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HomeMy WebLinkAboutMCCREADY MEADOWS Lots 1-11 S-10882McC ady Meadows Lots - #$-Z088 Lots 1-11 McCready S/D Soil Absorption System Nitrate Analysis This is a simplified nitrate analysis based on the High Rate Soil Absorption (HRSA) Task Force, Recommendations on Key Management Issues, Minnesota Pollution Control Agency, as presented by an ADEC short course on Analysis of Groundwater Nitrate Mathematical Models, October, 1989 and in accordance with 18AAC72.260 (a)(5). This is a simplified mass -balance analysis, and relies on some assumptions concerning hydraulic gradient and direction. For the purposes of this analysis, it was assumed that the groundwater flow was more or less perpendicular to the SAS, which is 150' by 3' by 10' effective for a total of 2920 feet square. It was also assumed that the nitrate concentration in the wastewater was approximately 60 mg/I, a reasonable assumption for domestic wastewater, and that the average hydraulic gradient in the aquifer was approximately 0.080 ft/ft. CO= Qb'Cb+Qs-CS+Qi'Ci Qb+Qs+Qi Qs = 6,600 gal/day Quantity of Sewage CS = 60 mg/I (NO3-N) Concentration of Sewage Qi = 19 inches/yr •ft2 Rain Fall (inches per year) Ci = 1 mg/I Rainfall Concentration of Nitrates Cb = 1 mg/I Groundwater nitrate concentration Ksat = 500 gal/day •ft2 (from Table 4 - Silt w/Gravel) i = 0.03 ft/ft (Hydralic Gradient, Assumed) A = 367,427 ft' Lot Area Factors for Determination of Ground Water Flow Area (assumes ground water flows diagonally to leach field) Leach Field Area = 870 ft2 Existing Well Depth = 0 ft Depth to Saturated Water Table = 5 ft Depth from Water Table to Well Intake = 0 ft CO= Ksat- i-A'Cb+Q.' C.+Qi' Ci Ksat I A + Qs + Qi 500 x 0.03 x 367426.5 x 1+ 6600 x 60 + 19 x 1 500 x 0.03 x 367426.5 + 6600 + 19 Of .«.»... = 5,907,417 � ' •.�, ��` 5,518,017 r ° r �•,i 1.07 mg/I (NO3-N) 4'Eh' em+ga.m e. +.a•f N . Steven R. Panna a ;. 'CE -049 49 r ` NITRATE.XLS Page 1 PERMIT N0: DESIGN P.I.D. N0: WASTEWATER DISP❑SAL SYSTEM LOT 1-11 McCREADY S/D 2 5 2 A O N 4 3 6 9 p r 7 v W3 8 �J L w S 0 2 5 h ? , 4 6 f E' 9 A 49TH :. ml. ... .......h., .... ...... ........... ........ !;Steven R. Pannone, •'•. No. CE 8149 REPARED FORE Susan McCready C/0 Alaska State Mortgage 6633 Brayton Drive Anchorage, AK 99507 5A 8A 2 a. 9A Zermatt PANN❑NE ENG. SVC, LLC P. ❑. BOX 102954 ANCHORAGE, ALASKA 99510 227-3522 P, 272-8218 Fax NTE: 9-7-02 DESIGN :ALE: 1'=50'1'=50' -- 9ff TeF. Pa £tae. .�. _� .._... •-2U` t3?IY.y £mR'eE.......r ? ti84 ....� ... j.±'OjJO! F 20A-2 LAKEWOOD i 33y�S• wi 1 iw N Ii to- P T? a { 14 € �' ±.: E L L S i i 13A S U E D€ V 1 S i 0 49TH :. ml. ... .......h., .... ...... ........... ........ !;Steven R. Pannone, •'•. No. CE 8149 REPARED FORE Susan McCready C/0 Alaska State Mortgage 6633 Brayton Drive Anchorage, AK 99507 5A 8A 2 a. 9A Zermatt PANN❑NE ENG. SVC, LLC P. ❑. BOX 102954 ANCHORAGE, ALASKA 99510 227-3522 P, 272-8218 Fax NTE: 9-7-02 DESIGN :ALE: 1'=50'1'=50' 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 13 19 20 B--lZO UIor� 1O CST - P F air C C) L:1 T F CI) ?i T Fr5'T P.O. BOX 102954 ANCHORAGE, ,0, W 272-8218 MED FOP— Sumn McCraoAy DATE PEMBIMM. 8-31-02 r r y r� •.,.� •Lot M .:<m ... y. r :rte • WAS GMUND WATUt �+ C•>n• IF TM, AT WHAT • r 1 • :P•• WATER AFTE. MONMENG? DATE- TZST BOLE �--- MZADM DAM Gam TM mm TM Dwmor W 8-31-02 1015 1035 1035 1105 1105 1135 0 30 0 30 0 30 6 7/8 5' 6' 4 1/8 6 1/4 4 3/8 --- 1 7/ --- 1 7/8 --- 1 7/8' iTA „T,I�I:H`.-,-.� i a a..... • t: yf� .'� � : . .a� c. ' z :.� . � .tom. .:a �� • .. �,. � . ra i. dam' � � bac: � �1M1� y• M'rI ., y:)�y '. : 'x ;r�::�• L` � S�TiL� I1C•)CT - PF:?f�C�C�t.31'�`tO� TI=s�T P.O. BOX 102954 ANCHORAGE, AK 99510 (907) 272-8218 1 4 3 4 5 6 9 a 9 10 11 13 13 14 15 16 17 18 19 20 IM — -r • • • •11,, ; FRAUM DA'Y'S ORM mm Mr Tm tamov WATM M DWP 8-31-02 1017 1037 1037 1107 1107 1137 0 30 0 30 0 30 6 1/8 4 1/4' 6' 4 1/8 6 4 1/8 --- 1 7/8 --- 1 7/8' --- 1 7/8' • .;:1;.151 : � s: �:.:c _ �. va'. •... r< t sorir..� i.c•�c�� - �r�ar:..cc•>rv�1rrc•�:� rrr�T BOX 102954 ANCHORAGE, 99510 (907) 272-8218 LEGALJ r: 1N'�1" ' • �cM «. 'fir '), ,:e • OR 1Topma 4 5 6 TM Tm W 7 8-31-02 1020 1050 1050 1120 1120 1150 0 30 0 30 0 30 6 5' 6 1/8 5 1/8 6 1/4 5 1/4' --- 1' --- 1' --- 1' 9 10 am Qnw aft CRAVE. 11 B181412- 13- 14 is— 16— BOH 17 1s 19 EFt" AT VIMT r :�t, � ' r i DEM TO WATER AFM • •wN TESTHOIZ W' MM EMVIrM 6 FT and 7 FT 0, ' 11 • . a_i Yt .".), �laiiYl;n 1;• Y.Si ' Y ra ! 9' • ; i #1 TM Tm W 8-31-02 1020 1050 1050 1120 1120 1150 0 30 0 30 0 30 6 5' 6 1/8 5 1/8 6 1/4 5 1/4' --- 1' --- 1' --- 1' W' MM EMVIrM 6 FT and 7 FT 0, ' 11 • . a_i Yt .".), �laiiYl;n 1;• Y.Si ' Y ra ! 9' • ; i #1 P.O. BOX 102954 ANCHORAGE, 99510 (907) 272-8218 FOR. Susan McCreadar DATE PERFORMED. B-31-02 n Ox• Loi 2 McCready S/D JLXWDJL HOLD 4 . OP. 1 B 3 4 S 6 7 a 9 10 11 12 13 14 15 16 17 13 19 20 D —et UND WATER ENCOUNTERED? IF ;,,, , AT WHAT DEPTH? DEPTH TO WATER AF72R MONITORING? DATE.,, D TZBT HOLE PEROLAITON TEST RUN BEWTEEN mm Tm W 8-31-02 1022 1052 1052 1122 1122 1152 0 30 0 30 0 30 6 5' 6 5 6 1/8' 5 1/8' --- 1' --- 1' --- 1' PEROLAITON TEST RUN BEWTEEN �-c•� rlr _� r,co c�, - r�r,r:: c�c•� r_.�� rr a � �r r�� �r P.O. BOX 0 . ANCHORAGE,r (907) 272-8218 PERFORMED FOR. Susan ;;.c .a` DATE PERFORMED�-8-31-02 t -U ► iz Ci•�IP• o DDD • 1 2 S 4 S 6 7 6 9 10 11 12 iS 14 iS 16 17 is 19 20 mow =71 e a U'l c -A • WATER IF ,, , AT WHAT DEPnP i ® DEPM TO AFTER MONITORING? -10 DATE, 10-1&D2 Tzsr Holz RZAUM nM GROSS TM IST mm OF VAM mr DIMP B-31-02 1025 1055 1055 1125 1125 1155 0 30 0 30 0 30 6 7/8 4" 6" 3 1/8 6 1/4 3 3/8 --- 2 7/8 --- 2 7/8 --- 2 7/8° 1. Sl' 6 rrr u.e TEST i! 5! 5 FT and 6 Fr SrC�71�LS LO Cr - Pi:�I.�•C�C�)t..1T`tOO � T%s�T • • BOX 102954 ANCHORAGE,0, (907) 272-8218 • ;iR• IM FOR. Susan McCres4y DATE PERFORIGM r LEGAL • -�i• • .�, r ih� • 1 2 3 4 5 6 7 a 9 10 11 12 13 14 15 16 17 18 19 20 ,ri ,. e e, c WAS GROUND WATER 1 • YES, • & • • • s' WATER AFTER MONIT-12 DATE. D TBT HOS. • ,,.I, :I :A ..� r r :+:�«r • -: 'e:• r � �,:, r `� � ,a, ..: ' r -• : • ..� .: ><�• • r w • =r r..z; PERFORM= Eff: Stevm'?L PE, HLT cw WAM HLT DMP 8-31-02 1027 1057 1057 1127 1127 1157 0 30 0 30 0 30 6 1/8 4 1/4' 6' 4 1/8 6 4 1/8 --- 1 7/8 --- 1 7/8' --- 1 7/8' • ,,.I, :I :A ..� r r :+:�«r • -: 'e:• r � �,:, r `� � ,a, ..: ' r -• : • ..� .: ><�• • r w • =r r..z; PERFORM= Eff: Stevm'?L PE, P.O. BOX 1029S4 ANCHORAGE, 99510 j. (907) 272-8218 FERFORMEDFOR: Busen McCmad3r DAT : 8-31-02 LEGAL D ON` Lot 4 McCmady 8/D Illal H®Lau ? OR/ Organfe 1 M. FUL W/ 2- 3- 4- 5- 6- 7— a- 9- 10 34S63910 w oft Q RAVE 11 12 — 13 14— is- 16- 17- BOH '415le1?BOH 13 19 i r. �• urr.h; a •y i' I& • K• DEPM TO WATER AFTER • •-N DATM 10-16-02 THO HOLE i AM •.. RATE 0 tl I I Mh HOLE • R,IE Inches, TWZ TWE W 8-31-02 1030 1100 1100 1130 1130 1200 0 30 0 30 0 30 6 5' 6 1/8 5 1/8 6 1/4 5 1/4' --- 1' --- 1' --- 1' i AM •.. RATE 0 tl I I Mh HOLE • R,IE Inches, 1 2 3 4 s 6 7 s 9 10 11 12 13 14 is 16 17 is 19 20 • 0 5014-. I.00t; F'£.R•C«O[_1'rIO1 TT:FtiT L!Z11W tl,LDV-2SIAIULaLoli P.O. BOX 102954 ANCHORAGE, AK 99510 (907) 272-8218 FKL w/ WAS GROUND ,. , E .• RM 1' YES, AT WHAT r DEPM TO WATER AFTER • •Rf t f DATE:t. FMADM DATE OWN tw tormov WAM m DWP 8-31-02 1032 1102 1102 1132 1132 1202 0 30 0 30 0 30 6 5' 6 5 6 1/8' 5 1/8' --- 1' --- 1' --- 1' • f. 1,,,I �l'a ♦ .+<t«� ... ITTT F•R&v 191 ivy:, roTae P.O. BOX 102954 ANCHORAGE, 99510 (907) 272-8218 ER • r FM FOR.��y DATE PERFORIMI 8-31-02 LEGAL 6 r ►:.<i 1 s 3 4 s 6 7 a 9 10 11 12 13 14 18 16 17 18 19 20 m Kn IF YES, AT VaUT D -0' TILT HOLZ mm r . 'TN 12 Ll .. 7Organio- 8-31-02 1215 1245 1245 1315 1315 1345 0 30 0 30 0 30 1 .592� 00 I ft50 z Powbr Graded.j '89-4.9'.5i9 "E 305.61. \TH10 . ' LOT 6 ao. N 8Gu 2 I' .,,E 1 72 c� C r� s 85.9 o _: �I �' 41.>__88 ; — - 488.30 NFj9"49' Fig "cwSandy In GMVEL �:. IF YES, AT VaUT D -0' TILT HOLZ �• �..L.I..N\�;� k-:! .,• ;:a.��. �•�;-.`c �;• ��e ��: . :r:. ,,_ l�.x.t �.; .,. � •�•1: �. •i,`..:. ;� . �. • atu�' , :a■ ..zn" Albl--IWhTzj mm TOM W 8-31-02 1215 1245 1245 1315 1315 1345 0 30 0 30 0 30 6 7/8 5' 6' 4 1/8 6 1/4 4 3/8 --- 1 7/8 --- 1 7/8 --- 1 7/8' �• �..L.I..N\�;� k-:! .,• ;:a.��. �•�;-.`c �;• ��e ��: . :r:. ,,_ l�.x.t �.; .,. � •�•1: �. •i,`..:. ;� . �. • atu�' , :a■ ..zn" Albl--IWhTzj �t•Oi1T_� T.C•?Ctr F'TaF2<<�O• L�iTTC7N TIr�T •� cl.' '1 • BOX 102954 ANCHORAGE,f (907) 272-8218 PFAMRIM FOR: Suwn McCreuW DATE PERFORIMM8.31-02 ®® ............ `6 W s-31-02 ®® SECM LEGAL . --- 1 7/8 --- 1 7/8' --- 1 7/8' ENCO ED? NO Tzar Holz 10 SEOM ^� IF YES, AT VMAT O t 0� .`�92 c� (D Y Topme . O D TO WATER AFTER Rrn�t 17 3 is DATE: 10-16-02 - - — 4 ; THS _` 3� 61' ORAVM wl h{ s .12"&boldereH �; ao: 6 LOT 6 N ? SSG+� 7 ' "F i 72 acres s li `r 1 2.88 Gm 10 -= 4-88.30 (`dFi9 49'Fi9 - � ft 12 0MVEL yvl em � Q 13 mm wT Tam W s-31-02 WAS GROUND NATER SECM 14 --- 1 7/8 --- 1 7/8' --- 1 7/8' ENCO ED? NO 15 IF YES, AT VMAT TWT HOIZ _--- BOH D TO WATER AFTER 17 MONITORING? -12 is DATE: 10-16-02 19 Ell • ,tl t . , t • .; • • • • .._..I. IFspZz Z4 •'1) 03 I, z & • mm wT Tam W s-31-02 1217 1247 1247 1317 1317 1347 0 30 0 30 0 30 6 1/8 4 1/4' 6' 4 1/8 6 4 1/8 --- 1 7/8 --- 1 7/8' --- 1 7/8' • ,tl t . , t • .; • • • • .._..I. IFspZz Z4 •'1) 03 I, z & • S O IIT.. S I: CJt�T I' I ?R K) T F'%4 ° I OO U `I"I r• T • t 1` Y P.O. BOX 102954 ANCHORAGE, 0 (907) 272-8218 19 0 0 FALMUM DATi WA WAS GROUND WATER 1222 1252 1252 1322 1322 11352 0 30 0 30 0 30 ENCOUNTERED? No --- 2' --- 2' --- 2' FYES, AT WHAT :• DEPM TO WATER AFTER MONITORMG? -13 DATE. 0:. 19 0 0 FALMUM DATi WA 8-31-02 1222 1252 1252 1322 1322 11352 0 30 0 30 0 30 6 4' 6 1/8 4 1/8 6 1/4 4 1/4' --- 2' --- 2' --- 2' �Oi�i.,� Tl(�{cx - PF;aR•CCr)fe:1'r'TOr'ti TrST P.O. BOX102954 ANCHORAGE, AK 99510 (907) 272-8218 FERMRMED POOR: Susan McCmady DAA FEMRIUM8-31-02 LEGAL DESCRIMOM, Lot 7 8/D MOLE 12 OR 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 0 iii =71- c F714�` . r :,TrT s ax .x Tzor HoLic FEROLAITON RATE 15 (min/inch) FERC HOLZ DIAMETER 6 TESr RUN BEWTHEN 7 FT and 8 FT • $,Ii,ID! '-7 7. r.- 7- . rte. 's �'. 7 c . . r ,.�. .: i a.43 t.7 Im TM TM WATM 8-31-02 122`-5 1255 1255 1325 1325 1355 0 30 0 30 0 30 6 4° 6 4 6 1/8° 4 1/8° --- 2' --- 2° --- 2" FEROLAITON RATE 15 (min/inch) FERC HOLZ DIAMETER 6 TESr RUN BEWTHEN 7 FT and 8 FT • $,Ii,ID! '-7 7. r.- 7- . rte. 's �'. 7 c . . r ,.�. .: i a.43 t.7 Im P.O. BOX 102954 ANCHORAGE, AK 99510 (907) 272-8218 13 14 is 1 16 BOH 17 is 19 20 IroW I EVA WAS GMUND WATER ENCOLINTERM? No IF YES, AT VMT DZPrH? PON =4# IMHOLE FSADM UM Grow TM M TM DEM(w WAM mr IwMP B-31-02 1230 1300 1300 1330 0 30 0 30 0 30 6 4 1/8' 6 1/4' 4 3/8 6 1/2 4 5/8 --- 1 7/8 --- 1 7/8 --- 1 7/8' —1330 -1400 0 �r. iifkkl:t.l w W. -I M IFA �w vv-lr m; MR S'CO IiT�S I�C)'CT - P T'�P�C«t� T�1 TT n iU TT�4T =M=77= BOX 102954 ANCHORAGE, 99510 W 272-8218 19 Kol WA= DRW WAS GROUND WATER 1235 1305 1305 1335 1335 1405 0 30 0 30 0 30 ENCOUNTERED? No --- 2' --- 2' --- 2' IF r: AT WHAT =• .. DEM TO WATER AFTER O . IN DATE: i.. 19 Kol [��j,.T �IJI��#�k�i�+� a.«at���>,'e._. y+ 1 ' . ..: r �• : z • �...x .. `..• • a •t ' •.._ .�a �� _ x 'Cs. i. K WA= DRW 8-31-02 1235 1305 1305 1335 1335 1405 0 30 0 30 0 30 6 1/8 4 1/8' 6' 4 6 1/8' 4 1/8 --- 2' --- 2' --- 2' [��j,.T �IJI��#�k�i�+� a.«at���>,'e._. y+ 1 ' . ..: r �• : z • �...x .. `..• • a •t ' •.._ .�a �� _ x 'Cs. i. K Sohl S LO+ C F'FaRC I' I. P.O. BOX r ANCHORAGE,99510 (907) 272-8218 IF YES, AT WHAT D -V OR TM 1Topom 9-1-02 1415 1445 1445 1515 1515 1545 Z 6 1/8 4 1/4' 6' 4 1/8 6 1/4 4 3/8 --- 1 7/8 --- 1 7/8 --- 1 7/8' S 4 PoodyGmded GRAVRLw/Smd op5 5 7 a- 9- 10- 1011 11 12 (MVEL GM W/Cabblw 81415 13- 14— is 16 BOH 91919 17— is- 19- 20 IF YES, AT WHAT D -V •G"1.,11 . e` .. a.. :... �� - •x . ti : � mm TM WAM 9-1-02 1415 1445 1445 1515 1515 1545 0 30 0 30 0 30 6 1/8 4 1/4' 6' 4 1/8 6 1/4 4 3/8 --- 1 7/8 --- 1 7/8 --- 1 7/8' •G"1.,11 . e` .. a.. :... �� - •x . ti : � 11%30fLS T,O C, P T aR C Or T..r1 T'T O V T P-~ T P.O. BOX 102954 ANCHORAGE,0 (907) 272-8218 17 18 19 20 N- ., -4 :A A 1 U. F' r: l M;d Em ,NI : . • ♦ �r_ FdLiDm ism GRM wr 9-1-02 1417 1447 1447 1517 1517 1547 0 30 0 30 0 30 6 1/8 4 1/4' 6' 4 1/8 6 4 1/8 --- 1 7/8 --- 1 7/8' --- 1 7/8' RUN BEWTSM 5 FT and 6 FSP VT mi �•0• ILLS LC!)Cr - F'I�P•CrUL:r1TIC��i TI=LT P.O. BOX 102954 ANCHORAGE,99510 (907) 272-8218 � 1 r -t r r. JI •Falk J + .Mr • 1 a 3 4 5 6 7 a 9 10 11 12 13 14 15 16 17 13 19 20 WAS GROUND WATER ENCOUNTERED? �. S WfMT r i • DEPTH TO WATER AFTER MONITORING? -14 DATM: 10-16-02 ME FSADM DAM GRAM TM M TMIM t WA= 9-1-02 142`'5 1455 1455 1525 1525 1555 �i 49,0 (6 6' 4 1/8' 6' 4 1/8 6 1/4 4 3/8 --- 1 7/8 --- 1 7/8 --- 1 7/8 8: 'S N g �, Ln to i G72 t7 :�:'£'S O - TH 1. - O O >, TH1 49024 ' �- — �s TH2 00 j TH 1 WAS GROUND WATER ENCOUNTERED? �. S WfMT r i • DEPTH TO WATER AFTER MONITORING? -14 DATM: 10-16-02 ME FSADM DAM GRAM TM M TMIM t WA= 9-1-02 142`'5 1455 1455 1525 1525 1555 0 30 0 30 0 30 6' 4 1/8' 6' 4 1/8 6 1/4 4 3/8 --- 1 7/8 --- 1 7/8 --- 1 7/8 'a-;L=i'MMe ezmvaW 17 Dm . t.Hole wesoaked be&m •<. ftoL SOTiI I,(�7Cx Pi�!T2•C«t•�LAl.,1T BOX 102954 ANCHORAGE, 99510 (907) 272-8218 PERFORMED FOR- Suanin McCready DATE :5-31-02........ `�, twMP 8-31-02 1427 1457 1457 1527 1527 1557 OSSrSS� i® LEGAL D ON• Iii 10 3 TEW HOLE 1S BLOM N sent., , O iTopud OR Lo TH 1 3Pow]* Graded { ��� C]C e 8 OP GRAMM / ` } 4 0 1� fi 4 8J°� 1 03:"W 6 y CSO i .{' / G. a res TH 1$� S p TH 17-� 9 w/alt. \ GM Imp cobbles 49ri 24 •.10 ...): TH2 12 00 l .' TH 1 r• •ik it zA z4 :oi r 19 0 TM KM � rr DEM TO WATER 4 - • 'J1 • t DATE: 1016-02 :r:;" 'vii• F65)7 17 1 :1 r i • ::+.tis :77. I M 4 7F.77 I-.. 777': .a'. `.1... 1r :i*"M T= Tom WA= twMP 8-31-02 1427 1457 1457 1527 1527 1557 0 30 0 30 0 30 6' 4 1/8' 6' 4 1/8 6 1/4 4 3/8 --- 1 7/8 --- 1 7/8 --- 1 7/8 :r:;" 'vii• F65)7 17 1 :1 r i • ::+.tis :77. I M 4 7F.77 I-.. 777': .a'. `.1... 1r :i*"M _SFTIM1430- , - 300 1 6 4 3/8 • _ ___';1400 __, __1530 __ __4600 �c�rir,s r1�c - �r�r�.c«car.;�Trc•��v Tr-��r P.O. BOX 102954 ANCHORAGE, AK 99510 (907) 272�8218 f WAM low WAS GROUND WATER •.,.,...1 MWORIM FOR: Susan Mccree4y DATE PEIMORIMM.9-1-08ti i' YES, ® p 0 •. • :•. DEPM TO WATER AFM ll6aESS �®� 0TWr LEGAL D ®Di• E.ai it $/D .t MONMORING? -14 DATE. 10-16-02 HOLE 20 Ai f 490.2 OR organics _ ----, — ., .. ,. . TH2 0\ �= TH 19� $Pomly graded(.0 4 GRAVEL W/ cobblm I �� �i ; Twr HM i,-- S:C3 �;�• ' Ell �'� 5- – 6 6- j L7 7 SMTIML s;; a (�. 9 R5Q' 10 es .. l Eam GMVEL obbbe r- 12 , r; 0 19 f WAM low WAS GROUND WATER 1432 1502 1502 1532 1532 1602 0 30 0 30 0 30 ENCO No --- 1' --- 1' --- 1' i' YES, •. • :•. DEPM TO WATER AFM MONMORING? -14 DATE. 10-16-02 19 ,'^:/ 77::` f WAM low 9-1-02 1432 1502 1502 1532 1532 1602 0 30 0 30 0 30 6 5' 6 1/8' 5 1/8' 6 1/8' 5 1/8' --- 1' --- 1' --- 1' ,'^:/ 77::` GREATER ANCHORAGE AREA BOROUGH DEPARTMENT OF ENVIRONMENTAL QUALITY Case # 3330 "C" Street REOEIV~D ANCHORAGE, ALASKA 99503 SEP ~ lgT~ Nil Performed For Philip Lockwood Legal Description: Lot 7 Bjock This Form Reports Soils Log ~:~ - Soil Test Must Be Logged TO 4' Depth Feet Soil Characteristics Tan gravelly silt Gray silty sand_ · laced with dipping seams of fine to coarse sand 4' to 12' (Mn) (MD) (SW) Was Ground Water Encountered? If Yes, At What Depth? Da ted · · NVIKONMer~iA~ Qu~L~ i t Subdivision Beaeon I!,£11s Percolation Test Below Proposed Seepage System - 1973 Reading Date Gross Time Net Time Depth to H20 Net Drop Percolation Rate Minute Proposed Installation: .Seepage Pit ~ Drain Field Depth of Inlet Depth'to Bottom of Pit.or Trench COMMENTS: 165 square feet of drainage area isrequiredper bedroom.' .... Test Performed BY e.E. Carlisle 'Date Certified BY: ALASKA MINERAL & MATERIALS LAB Date: $ ! 08 8 Z ~A~ ~ ~ FUTUI~E LBf 4 FUI'U~E LOT 3 ::i:!' N PENPDSED LOT ~?' UNFINI£1IEB/UN~CCUPIEZ! ----. 1 ~-~ LUT L RLOCK ~ HANP[DN HILL~ TOBBEN SPURKL~ND P.E. 205 · l$1'H. AI/ENUE ARCH. AK. 99501 (907) 279-5916 PERMIT # SEC. 15, TI2N RJW ROBERT FROHNE SEPTIC SYSTEt, t DESICN DALE: AUG, 12, 1997 SHEET: I/$ GRID: 2440 PIB ti 20313Ffgl.l}~/G $10 8 8 2 ~ ~ FLA'I-COP TECHNICAL SERVICES 14530 ECHO ST. AN CHORAG E, ALASKA 99516 SOILS LOG -- PERCOLATION TEST DATE PER.OR~.D:_ PERFORMED FOR: DEPTH --. (leer) --. 1-- 2:-- ,5-- _ pT SLOPE 5ICI' L .... / . to. ~. 11-- 13-- 14-- 16-- 17-- 18-- 19-- 20-- COMMENTS: ~P~RC ~OLE V~A*TERi~ SITE PLAN Date Re=ding Clock Net Time Percometer Net Drop 'I3me (minutes) Reading (inches) ........................ PERCOLATION RATE_ J ....... {minutes/inch) PERC HOLE DIAMETER TEST RUN ~E~EEN.._.2...~Z__ FT A~.___~ ...... ~T PERFORMED BY FLA'I=rOP TECHNICAL SERVICES. l_ ..,~_,~t~ ~ CERTIFY THAT THtS TEST WAS PERFORMED IN ACCORDANCE WITH ALL STATE AND MUNICIPAL GUIDELINES IN EFFECTON THIS DATE. DATE: $108 8 2 ~A~ ~ 2~m~ Municipality of Anchorage Page ._../___.o! ~.. DEPARTMENT OF HEALTH AND HUMAN SERVICES ENVIRONMENTAL SERVICE?, DIVISION P.O. Box 1.96650 · Anchorage, Alaska 99519-6650 · Telephone: 343-4744 On-Site Wastewater DisP0..sal System and/or Well Inspection Report Permit Number: ._~..'_.~' ~ '7 0 ~-'7 ~ RID Number: Name. F ~.o N l'J ~j ~ A ~"/ wastewater system: [] New ~;~*Upgrade ~"'°"~ c~°ir~[ [J, tL-l.-~ig)~ D ~ ABSORPTION FIELD Phone: IN°'°{ Be~.~oms: ~Deep Trench ~ Shallow Trench O ee~ 3 Mound O O~hor L E G A L D E S C R I P T I O N so. Raling:~ o ~ ~GPD/Sq. WELL: ~ New ~ Upgrade e~.~el ~iu,h: ~ SEPARATION DISTANCES o Septic a Holdin~ ~ S.T.~.P. I w.t~, ~/O t~ LIFT STATION Remarks: BENCH MARK ENGINEER'S SEAL 2nd. Department of Health and Human Services approval Reviewed and approved Dy: ~ d.~,4 Date PR~PO$£'~ LDT .2 Pg[]PDS£ZI LDT I $1¢1N6 TIES: $§.4 ~ ~ ~C 45.5 ~0 SLO BIO 6t.6 AE 55,7 ~E ~5 A[ 7~. 8 ~ 7~.0 -- E~CH ~K 4G 108.5 8G 87.5 '~':' r TOTAL DEPTH 9 £r · .'.', EFFECTIVE ROCK DEPTH 7 FT '"" \ TOTAL COVER 5 FT. / / / \ ~=~ ~ ~ ~ -.....:-..95... ~ : 4~h ~ & -.. '....'...:. ~,,,,,,~,,~~ ....... ~ / TOBBEN SPURKLANO P.E, 203 W 15TH. AVENUE ANCH. A~C 99~o~ (907) 279-$916 SEC. 13, TI2N ROBERT FROHNE SEPTIC SYSTEM AS BUILT DATE: SEPT, 11, 1997 SHEEh 2/3 GRID: 2440 PEI~MfT It SW970275 PI1} tl 015-092-50 ~O3!3f'R~.DI,/6 S t~ncl~r'ol Trenches: ~'E~ If~F r'ock Cover T 1500 90( Septic tank NU 90.2 ~EST END TB~BEN gPURKI,.AND P.E. 203 WlSi;h Ave Anchoroge A~' 995D! ~.l.., ,~,~ Icl,, 4, N~v],/4 2EC. 13, II2N, RS'V ~'0~ FROHNE BENCH MARK, ~OP OF PORCH A$$UH£']) ELEV, I00.00 SEPTIC SYSTEM AS BUIL. T DATE.~ SEPT. 1~ 1997 .<;NEE'I: .?/,~ GRID: ~d40 P£Rtdff // SW970275 PlO // 015-092-50 20513FR$,flWG Munlctpallly al Anchorage DEPARTMENT OF HEAL'TH & HUMAN SERVICES 825 "L" Street, Anchorage, Alaska 99502-0650 SOILS LOG -- PERCOLATION TEST PERFORMED FOR= Township. Range. Section: SLOPE SITE PLAN 8..- lo - WAe OROUNO WATS. s 11- , L tP YES, AT WHAT O DEPTH? p 12- Depth to Water After t 13 - fll~flil~r;flD? ~C~ Dire: . 14 [J .L ~la~ Data Time Tim0 19- Depth 1o Net Water Drop 20- COMMENTS PEFICOLATJON RATE _ TEST RUN BETWEEN ~'~.,~ ,, {rain,iDs/inch) PERC HOLE DIAMETER . ~:~ '1 ! PERFORME[~ BY; --- I CERTIFY THAT THIS TEST WAS PERFORMED IN ACCORDANCE WITH ALL STATE AND MUNICIPAL GUIDELINES IN EFFECT ON THIS DATE, DATE: 72-008 {Rev. 4185) PERFORMED FOR: LEGAL DESCRIPTION: 1- 2- 3- 4- Municipality of Anchorage DEPARTMENT OF HEALTH & HUMAN SERVICES 825 %" Street. Anchorage, Alaska 99502-0650 SOILS LOG -- PERCOLATION TEST /. tE~G~NEER's SEAL~,, -- DATE PER~(~RME6: SITE PLAN 7 10- 11- 12- 13- 14- 15- 16- 17- WAS GROUND WATER ENCOUNTERED? Oeplh.lo Waler kller 15A~nilo-'hiD? Date: F-eading Date Gross Net D~pth rD {:: ~ k ~ Time Time Water Net Drop 18- 19- 20- PEF ?OLATION RATE. ~'~) (mmutestmch] PERC HOLE DIAMETER TESI RUNBETWEEN 7 FTANO "7,~kFT COMMENTS ACCORDANCE WITH ALL STATE AND MUNICiPAl_ GUIDELINES IN EFFECT ON THIS DATE. DATE. 72-008 (Rev. 4/85J // FUTURE LOT 4 f'UTU£E LOT 3 NO WELL I-IN I. LI1 2/,/] l 1 N , i......T.~_// L[.IT L BI_LICK .7, HAMPTDN HILLS PEIZIP[}SEB LOT Z-' J UNFINISHED/UNDCCUPIED ----~.~ ~X~X' SCAL£': l' = IO0 FT. :::::.. PRDPD,SED LOT 1 / .ii~; ~ ~ X J ~i TO~N SPURKLANB , ~ l' ~ ...... '-" TOBBEIV SPURKLAND P.E. 205 W tSTH. AVENUE ANON. AK. 99501 (907) 279-.~9/6 SEC. 15, TI2N RSW ROBERT FROHNE SEPDC SYSTEIW DESICN DATE: AUG, 12, 1997 SHEET: I/$ GRID: 2440 PERMIT # PJD # P£OPDSEB LDT ~ N ABANDON CRIB F?DPDS£B LDT I A£ANDON b/ATER LINE -' INSTALL NEW TRENCH: s :ls~z TOTAL LENGTH 82 FT TOTAL DEPTH 9 FT ~ ~ ~ ~ " ~ EFFECTIVE ROCK DEPTH '::i:. ~, ~ TOTAL COVER J FT. 7 FT SCALE: 1' = 50 FT. '""-~ -/ ,/ TOBBEN SPURKLAND P.E. 203 I'K 15TH. AVENUE ANCH. AK. 99501 (907) 279-$916 SZ/2, SEC. 15, TI2N ROBERT FROHNE SEPTIC SYSTEit/I DESIGN DATE: AUG. 1.2, 1997 SHEET: 2/5 GRID: 2440 PERMIT # PI~ # ?0313FRS. DWG S t, ano!ard 1-~ench~s: 82' L on9 9' Deep 7' Fewer rock 3' Cover 1500 qal Septic tank NO SL'ALE . ~i~'i~ -.-.. 1500 hal_ CONCRETE TANK NO SCALE TD~B£N gPURKLAND P.E. ~03 Wt~th Ave Anchoroge Ak 9950I SI,,'~ S h/!/4, N ~ SEC. 12 112~ R3W RDB F'RBHNC BENCHMARK. ASSUMED EL£'~ I00.00 SEPTIC SYSTEM DESIGN ~^TE, MAY L I997 SHEET, 3/3 OR[n, 2440 Municipality of Anchorage Page I of DEPARTMENT OF HEALTH AND HUMAN SERVICES ENVIRONMENTAL SERVICES DIVISION P.O. Box 196650 · Anchorage, Alaska 99519-6650 · Telephone: 343-4744 On-Site Wastewater Disposal System and/or Well Inspection Report Permit Number: S&/ ~¥og~ PIDNumber: OhS'OPC.~ Wastewater System: O New [] Upgrade ABSORPTION FIELD [] Deep Trench [~ Shallow Trench [] Bed n Mound [] Other Soil Rating: Total Oepth.i~'om original grade: Name: I~ry Fr~ A,~ ~ ^ddrssa~ LEGAL DESCRIPTION Lot: Brock: Subdivision: Depth to pipe boltcm imm origleal grads: ~]. I¢~z$~ '/~, I,~ Ft. Range: / Section: Fill add~ above original grade: WELL: ~J O New O Upgrade Tolal Deplh: C~sed To: Total a~rpaon area: Dale Ddlisd: Slalic Wa~r ~vel: Installe~ I Pump ~1 at: ~sing Heighl Above Ground; ~.~ ~,. ~,. TAN K SEPARATION DISTANCES Material: - ~e/ ClessiticsUon (Private, A,EkC]: Driller: Yield; From w,~.- Surface Water Lot Line Foundation Curt~i~ Drain Gravel depth beneath pipe o.$- FL Gravel length: 1 1.3 Ft. N umber of lines: J' -- FI. Pipe material: ~) Cate installed: n Holding E3 S.T.E.P. Capacity in gallons: T~n ~ ( co 4~ Number of Co.~partrneats: LIFT STATION I "Pump on" level at: "Pump oft" level at: J High water alarm at: I Pumc Make & Model Electrical Inspections perlormed by: BENCH MARK Location and Description: Assumed S=.levetion: (oo, o ENG[NEER"S SEAL inspections performed by:~ 1~530 ~c~o St:~ Dates: 1st ~/~/~ Department of Heal~ ~man ~ervico, approval 72-013 (Rev. 9/gl) MOA25 Permit Page P_ of 3 Municipality of Anchorage DEPARTMENT OF HEALTH AND HUMAN SERVICES ENVIRONMENTAL SERVICES DIVISION P.O, Box 196650 · Anchorage, Alaska 99519-6650 · Telephone: 343-4744 On-Site Wastewater Disposal System and/or Well Inspection Report Legal Descdption: $1/~/5~ '/~ Nu.~'/¥/Sec I~/ T/z^~, /f$~, PID No.: o ~¢o ~83~ ~ - ~ ~ ~'~,,~'~ ~/l/ ...................................... ~ ............. hd ............... + ........................................ ~ ......................................... ~ .............. ~'~""'~'~'~/~ .................. ' ......................................... 1 ..'~PO N D Technical !Services ~4530 ~.cho S(reet ~chbrage, Alask~ 99518 W IT~ ,~EXtSTING EXtST. ENGINEER'S SEAL ~ ..... ,..~ Permit No..5' t~' ~ ¥ 0 ;Z E ~ Page 3' of '3 Municipality of Anchorage DEPARTMENT OF HEALTH AND HUMAN SERVICES ENVIRONMENTAL SERVICES DIVISION P.O. Box 196650 · Anchorage, Alaska 99519-6650 · Telephone: 343-4744 On-Site Wastewater Disposal System and/or Well Inspection Report Legal Description: 51/'~ Se '/~ N w.,,'/,,,/5'ac t3 ENGINEER'S SEAL / p~OPO~,E~ /) Flattop Technical Services 14530 Echo Street Anchorage, Alaska 99516 PLAN ARs FLATTOP TECHNICAL SERVICES 14530 ECHO ST. ANCHORAGE. ALASKA 99516 SOILS LOG -- PERCOLATION TEST LEGAL DESCRIPTION: DATE PERFORMED: __...~&'[~.~ ~ .... PERFORMED FOR: HAP.'/ ~ROHNE DEPTH . (leer) . pT ~-- 5t~ REbI315H SAab"/ LOAM SLOPE a- CLEAq~ ~RAV~L 10 - ' 11-- 12-- 13-- SITE pLAN / 14-- 15~ 16-- 17-- 18~ 19-- Cloct( Date Reading Time Net Time Percometer Net Drop (minutes) Re,~ding (l~ches) ., ttq~ ~l 31~ PERCOLATION RATE_ J ....... (minutes/inch) PERC HOLE DIAMETER TEST RUN BETWEEN.__~_.~...- FT AND___.~ ...... FT PERFORMED BY FLAi-roP TECHNICAL SERVICES. ] ..~..~.~~ CERTIFY THAT THIS TEST WAS PERFORMED IN ACCORDANCE WITH ALL STATE AND MUNICIPAL GUIDELINES IN EFFECTON THIS DATE. DATE: O"/' ~'7_/~ ~/ FLATTOP TECHNICAL SERVICES 14530 ECHO ST. ANCHORAGE, ALASKA 99516 SOILS LOG -- PERCOLATION TEST LEGAL DESCRiPTION: 592, 5WY~.~ NW~/~.~ Tt:Zt, I,R31v'~ 5£c ~'~ DATE PERFORMED: PERFORMED FOR: OEPTH (teet) PI' 2-- SLOPE : 13-- ~E£P5 Depth tp~Gror, md~.valer Date 14-- 15-- 16-- 17-- 18-- 19-- 20-- COMMENTS: Date 5T/~P.T +Hoo __~_J'~ Clock Net Time Reading Time (minutes) P~ESoR~. ......... 121 l'3. t )otlg 12~ 13',~ Per'corn eter Nat [~op Reading (inches) _ 2~ v~ '30 =3 _ __[~ -- PERCOLATION RATE_._I_,...~- ...... (minutes/~nch} PERC HOLE DIAMETER TEST RUN BETWEEN 2 [/3. FT AND ,.~ FT PERFORMED BY FLATI'OP TECHNICAL SERVICES. I _~.~ ..... CERTIFY THAT THIS TEST WAS PERFORMED IN ACCORDANCE WITH ALL STATE AND MUNICIPAL GUIDELINES IN EFFECT ON THIS DATE, DATE: O'"'//~, 7 //~l ~ Sent By: d A MunteP] 348 8692j Nov-5-02 12:40PM; Page FAX COVER SHEET Jo A. Munter Consulting, Inc, 5701 Penny Circle Anchorage, Alaska, 99516 email: jamunte~erctic, net phone,* (907) 345.0165 o~ 727-6310 fax.' (907} 345-~592 SEND TO Company name At~entio~ Fax n,;m~r ' " Totel ~,~i~, in¢ludlt)g cOveF: . ~ COMMENTS Sent By: J A Munten; 348 8692; Nov-5-02 12:40PM; Page 2 J, A. MUNTER CONSULTING, INC. November 5, 2002 VIA FACSIMILE: 344-7282 Ms, Suzan McCready Alaska State Mortgage Company 6633 Brayton Drive Anchorage, AK 99507 DRAFT Re: Evaluation of potential well impacts at McCready Meadows Subdivision, Anchorage Dear Ms, McCmady: This letter is to present the f'mdings of recent aquifer evaluation and testing perfomaed at MeCready Meadows Subdivision in Anchorage. The purpose of the testing is to show that "them is an adequate water supply to support the proposed subdivision and effects of the appropriation of water to serve this subdivision on stwrounding properties" (J. Cross, written eommun. Jan 28, 2002). Background ~.~d · Cp Ii' C~ , McCmady Mea,~ Subdivision has received preliminary plat approval and has been ref~wt:d to the Public Wo~rks De-~avnnent for approval subject to a finding that them are adequate reserv.,s of wa~er for the 12 pla~ted lots without affecting surrounding property owners. Water will be obtained t~om on-site wells at each lot, which is consistent with surrounding development. Mr. Cross provided guidance on performing aquifer testing at the subdivision to meet MOA requirements (see attached). Test pumping was performed between October 30, 2002 anti November 6, 2002, generally according to the MOA guidelines; ('resting of one well is in progress as of Nov. 5) Sources of Data and Methods The lbllowing sources ofinlbrmation and methods were used to conduct this evaluation: * Topographic maps sht~wing general slope and hydrography information. · Climatic information for estimating water budgets; * Report to agencies of any well problems; ,.. * Well logs for surrounding lots typically providing information on depth, yield, and water levels; · discussions with a local driller on conditions typically found in the area; · data from two newly drilled wells on the property and one pre-existing well; · aquifer test data coltecte~l from separate pumping of all three wells on the property. $701 P~qlqYCII~CLE, ANCHOaAG£, AK, 99516 j ~tnunteff~arctic.net PHO~q/~ (907) 345-0165; FAX (907) 348-8592 Sent By: J A Munter; 348 8692; Nov-5-02 12:40PMj Page 3 J. A, MUNTER CONSULTING, INC. Reports on Well Problems to Local Agencies Representatives of thc Municipality of Anchorage and the Alaska Departments of Natural Resources were contacted to determine whether there were any reports of well problems or concerns in the project area. Persons contacted were: Jim Cross, MOA Roy Ireland, ADNR Kelly Westphal, ADN-R Alt persons contacted reported that they were not aware of any reports of welI yield problems or concerns related to inadequate water in the area. This is au indication that aquit~r depletions are not oecmaSng in the project area. Hydrologic Setting Thc subdivision is located in the basin of the North Fork of Little Campbell Creek in Anchorage. The site is in the lower foothills of the Chugach Mountains at an elevation between 700 and 800 ft above sea level. Glacial drift d~osits arc generally between 200 and 300 1~ thick in the project area (Gltxss, 1988) and contain the primary aquifer at the site. Beneath the glacial drif~ aquifer is a fracture metamorphic rock aquil~r consisting of ar~llite, greywackc, and related rock tYl~S (Dearborn and Bamwell, 1975). Following is a summary table of information from 1 g representative well logs from surrounding lots obtained from State and MOA databases. Six of the wells tap a bedrock aquifer and 12 wells tap sand and gravel aquifers. '~e sand and ,gravel aquifers occur at a variety of depths ranging from 40 ft to over 200 feet below ground ~urface. Tmnsmissivities were estimated using thc formula: T---2000 x specific capacity, where specific capacity=reported yietd/dmwdown (Driscolt, 1986). Full drawdown is assumed where data were lacking, resulting in a conservative (low) estimate of T. Table I. Summary of well data near MeCready Meadows Subdivision Location depth Reported yi~i~""ia Estimated Aquifer Static water"ievei' gpm Transmi~sivity in feet below (gpd/ft) ground surface L. 2, Beacon 198 10 800 Cle~m 168 Hill Estates Gravel L. 7, Beacon 217 ................ 2400 Sand and" Hill Estates Gravel 5701 PE~¥ C~(:l.~, ANCHORAGE, AK, 995 t 6 jamu~ter~ie.net I~ON~ (907) 345-0165; F~.X (907) 348-8592 20 195 Sent By: J A Munten; 348 8692; Nov-5-02 12:41PM; Page 4 J. A. MUNTER CONSULTING,...I.NC, Location depth Reported yield gpm L. 1 B. 1, 143 Prospect Hts #5 Prospect Hts #5 L. 6, Beacon200 7 Hill Estates L SA, B. 17'0 Prospect Hts #5 L. 7A, B. 6, 40 25 Prospect I-Its #5 L. 9A, B. 6, 251 2.5 Pros.peet Hts #5 L. 4 B. 2, 93 15 Hampton Hills L, 2 B. 2, 201 4 Hampton Hills L, 1 B. 2, 1t8 10 Hampton Hills '~,. 'I5 B. 2, 139 Hampton Hills L. '14 B. 2, 340 7 ttampton Hills "L. '14 B. 2, 300 3.5 Hampton Hills L, 17A,' 206 40 Lakewood Hills L. $~ Nettle- 120 8 ton Acres # 1 Estimated Aquife~ Static water levei- Transmissivity in feet below (gpdtft) ............. ground surface 560 Bedrock 112 It0 ' Be~irock 110 470 Gravel 155 and Sand 570 Clean 130 gravel 12,500 sand and 9 Gravel 50 Decom- posed Bedrock 790 Gravel 100 Bedrock 710 Sand and Gm,el 10,000 Sand and Gravel 4,700 44 980 143'- 114 117 ...... Gravel, 1 Silty and Sandy (perf. 177- 184) Bedrock i 40 Sm~d and 124 Gravel 400 .... Gravel, "80 . silty .............. 5701 PI~NN¥ CIRCLE, ANt::IIOn^~E, AK, 99516 j amtmteff_&arct[~Tnet PHONE (907) 345-0 ! 65; F.,LX (907) 34g-gl92 Sent By: J A MunteP; 348 8692; Nov-5-02 12:41PM; Page 5/8 Location Wildwood Glen L. 3, B. 1, Wildwood Glen depth Reported gpm i95 I0 ._J. A. MUNTER CONSULTINGt INC. yield in 'Estimated Aquifer Static W~ier level Transmissivity ia feet below ......... (gpd/fl) ground surface clayey ......... 270 Silty 115 Gravel 404 !.5 Unknown Bedrock unknown Summary of Well Data Review Reported well yields range fi.om 1.5 gpm to 40 gpm, with the median well yield of 9 gpm. Static water levels range in depth from 9 fi to 195 fl below land surfhce. Well depths range from 40 ft to 340 ft. All wells show a reported well yield or greater thtm 1.5 gpm, which is equivalent to 2160 gqxl, which is approximately 'tbur times the typical daily demand for a single family residence, The median well yield of 9 gpm is approximately 27 times the typical daily demm~d for a home, The yield data presented in Table 1 show that wells in the project area are capable of supplying sufficient water ibr a single family home on an on-going basis. Estimated transmissivity values range from 44 to 12,500 gpd/sq ft. The median transmissivity value is 640 g-pd/g. Assuming a typical 10 foot aquifer thickness, this value is typical of silty sand aqui/~rs (Freeze and Cherry, p. 29). Water Budget, Groundwater Supply Potential, and Surrounding Development Regional data indicate that average annual precipitation in this part or Anchorage ia approximately 20 inches/year. Assuming approximately 20 percent of this amotmt recharges groundwater, then the 17.5 acre tract should be recharged by an average of approximately 5,200 gallons/day of water. This mount of water equates to 430 gallons per day each tbr the 12 planned homes on the tract, which is approximately equivalent to the mount of water that a typical home would use, Dearborn and Bamwell (1975) studied the Anchorage Hillside area to determine the long-term potential yield of water-supply aquifers. They conch:deal that the sustainable yield of groundwater aquifers in areas underlain by glacial drift aquifers was in the range of 2-4 million gallons .per day for their study area. This equates to 4,000-84000 gallons per day for a 17.5 acre tract, or 300 m 600 gallons per day for each of 12 homes on a 17.5-acre tract. Their study shows that grouadwater supplies in the project area are likely capable of supporting residential development as proposed. The proposed subdivision, with an. average lot size of 1.46 acres per lot, is consistent with surrounding residential development, which does not appear to have resulted in groundwater depletions in the area. This represents a small marginal hacrease in development of the area with 5701 PENNY Clac,;[,~, ANCHOP, AOE, AK, 00516 jamun~r~?areti¢,net PIIONE (907) 345-016~; FAX (907) 348-8592 Sent By: d A Muntep; 348 8692; Nov-5-02 12:41PM; Page 6/8 J. A, MUNTER CONSULTING, INC. on-site wells. Such a marginal increase in development in the area would not be expected to exert a significant effect on wells of surrounding property owners. Well Drilling and Aquifer Testing Two wells were drilled during October, 2002, as described on the attached well logs. For the pu~)ses of this report, the first well drilled, on Lot 3, is termed Well 3, and the second well drilled, on Lot 4, is termed Well 2. Well 2 was selected as the well for the first 24-hr aquifer test because it is in between the two observation wells. The pre-existing well on Lot 6 is termed Well I (see attached map). Well 3 is 42 ft from Well 2, and Well t is approximately 295 ft from well 2. It was intended to drill Well 2 more than 50 ft fi'om Well 3, however, difficult site access on the forested, sloping site with wet, silty, unfrozen soils prevented fig access beyond the location drilled. Wells 2 and 3 tap a silty sand and gravel aquifer at a depth of approximately 235-242 ft at well sites. Well 1 reportedly encountered bedrock at 300 ft and was drilled to a total depth o1' 340 ft. 'I]ae pumping and water level data were collected by Mr. Brian Wille and Mr. Joe Toiles ol'Aarow Pump and Well Service, LLC, and me. The pre-existing well (Well 1) is observed to have a marie water level of approximately 258 ff below land surface, peri, rated casing around 280 ft (t¥om a television camera inspection of the easing) and a easing depth of appro×imately 300 fi and a total depth of 340 ft (see attached log). The reported yield of the well is unknown. (Based on testing to date, the well yield appears to be I-2 gpm). Results of Testing Well 2 A 4 hr step drawdown test was pertbrmed at Well 2 at stepped flow rates of 6, 10.6, and 15.8 gpm (see attached data). The well exhibited 8.2 ft of drawdown at the end of the testing period. This represent~ approximately 75% of the available drawdown of 11 fl (235 ft to top of p!~mp minus 224 R static water level). B' 'asexl tm this test the 24-hr tea pump rate target was set at 15 gpm. Well 3 exhibited a maximum dmwdowa of 0.12 ft during the 24-hr test and was analyzed according to Jacob's method to yield a calculated transmissivity of 15,000 gpd/t't and a storativity of 0.00023, which are both reasonable values for a confined sand and gravel aquifer. The pumped well (Well 2) showed a maximum drawdown of 6.9 ft and the data were also analyzed by Jacob's method to yield an estimate transmissivty of 6600 gpd/ft. While somewhat lower than the vahxe calculated from the observation well d_a_ta, both values are reasonable and within the range of values estimated from the review of area well logs provided in Table 1. Storativity of thc aquif'¢r is not calculable with drawdown data from the production well. Data collected from Well ~ during (he test showed no evidence of drawdown, and according to the test protocol being followed, the well is being pumped for 24 hrs. 5701 PENNY Cme:L~, ANCIIORAGE, AK, 99516 jam~leff~arClic.net PHOI~£ (907) 345.0165; FAX(907) 3a8-8592 Sent By: J A Munten; 348 8692; Nov-5-02 12:41PM; Page 7/8 J, A. MUNTER CONSULTING, I,~C: The water level in Well 3 recovered and stabilized within 24 minutes of shutdown to a level 0.05 ff below the initial static water level. The water level in Well 2 recovered and stabilized within three minutes of shutdown. Transmissivity values calculated from the recovery data were 150,000 gpd/fi (Well 3) and 2300 gpd/fl (Well 2). While these values vary somewhat from values calculated during drawdown, they verify the general raage of' aquifer transmissivities present at the site. Results of Testing Well 3 Well 3 was tested on November 2, 2002, at a constant rate of 15.1 g~m (the maximum rate el'thc test pump) for 4 hours (see attached data). The well exhibited 0.78 ff of drawdown after 0.75 rain of pumping and stabilized for the remainder of the test. The well recovered to its pre- pumping water level after one minute o'f recovery. This indicates that the aquilL~r at this location is potentially capable of yielding over 100 gpm of water, although further testing would be reqtfired to confirm the sustainability of that rate. This test confirms the generally high value of transmissivity calculated from the recovery data from the Well 2 test for the aquifer at this well location. Results of Testing Well 1 (to be provided) Impa¢i Projections A Theis analysis is connnonly used 'to project the hnpacts of pumping a confined aquifer. Freeze and Cherry (1979) state that "if the aquifer properties, T (transmlssivity) and $ (storativity), and the pumping rate, Q, are known, it is possible to predict the drawdown in hydraulic head in a confined aquifer at any distance r from a well at any time t after the start of pumping". For projecting the effects of long-term pumping at a typical domestic use rate of 450 gpd, and the lower, more conservative value of T obtained From thc data from Well 2 (6600 gpd/fi), and S=0,00023, a calculated dmwdown 0,04 ft is calculated for a well that is 100 fi away lycra the pumping well after 30 years of pumping. This illustrates that the expected impacts from any single domestic well are expected to be negligible, even using very conservative assumptions. Even assuming that ail water f~om the 12-lot subdivision would be extracted t'mm one well near the center of the subdivision, only 0,9 ft of drawdown is calculated for a well located 300 ft away after 30 years of pumping. This assumes no recharge, which is highly conservative. Even at a distance of t00 fl, only 1.0 ft of drawdown is calculated. This is also a negligible amotmt of drawdown, considering the available drawdown in wells in the vicinity. Conclusions Groundwater conditions at McCready Meadows have been extensively studied using existing data sources and has been tested on-site with two newly drilled wells and one existing well. The 5701 PEIqi~Y ClRChE, ANC'IIORAGE, AK, 99516 iamtmtgr(alarct i~.ngt PHONtiO07) 345-0165; FaX (907) 348-8592 Municipality of Anchorage Development Services Department Building Safety Division MEMORANDUM O DATE: TO: FROM: SUBJECT: May 13, 2002 J _erry T. Weaver, Jr., Platting Officer, CPD s Cross, PE, Program Manager, On-Site Water & Wastewater Comments on Cases due May 16, 2002 2002 - 106 2002 - 107 2002 - t 13 The On-Site Water & Wastewater Program has reviewed the following cases and has these comments: A variance from AMC 21.40.080.G to allow structure(s) to encroach into the front, side and rear yard setbacks. No objections. A variance from AMC 21.40.030.G.1 to allow a deck/stairs to encroach into the front yard setback. No objections. A variance from AMC 21.40.0802F. 1.a to allow a lot to be smaller than required in the R-6 zone (Suburban Residential); Same comments as S - 10882 McCready Meadows. Case No. 2002-113 RETURN COMMENTS TO: DEPARTMENT OF PLANNING Zoning and Pla~ing Division P.O. Box 196650 Anchorage, Alaska 99519-6650 Phone 343-4215 A request for variance: A variance from AMC 21.40.080.F.1 .a to allow a lot to be smaller than required in the R-6 zone (Suburban Residential). S 1/2 SW 1/4 NW 1/4, less the SE 1/4 SE 1/4, Section 13, T12N R3W, S.M., AK and Beacon Hill Estates, Lot 7. Located at 9921 Hillside Drive and 7500 Beacon Hill Drive. CURRENT ZONE: R-6 Suburban residential district COMMENTS AND MEETING SCHEDULE: Zoning Board of Examiners and Appeals Public hearing Hearing Date: Thursday, June 13, 2002 Agency Comments Due: Thursday, May 16, 2002 Council Comments Due: Monday, June 03, 2002 DISTRIBUTION: STANDARD DISTRIBUTION Hillside East Community Council ZONING BOARD OF EXAMINERS & APPEALS Assembly Hall, Z. Jo Loussac Library 3600 Denali Street, Anchorage, Alaska Thursday, June 13, 2002 6:30 p.m. 2002 113 ~Map: Parcels N Scale 1:8000 Leclend: alcohol streetsano: Text parcels Municipality of Anchorage Department of Community Planning and Development P.O. Box 196650 Anchorage, Alaska 99519-6650 VARIANCE ZONING APPLICATION Case NumJ~er. I~-Io~l~l-I/ I/131 A. Please fill in the information requested below. Print one letter or number per block. 1. Petitionin~ for:. ! ~J,J,,. J~ J, LI J~ItHoI~J~I~L~ I I I I I II t~ I I III I 2. Abbreviated legal description fr12N R2W SEC 2 LOT 45 or SHORT SUB BLK 3 LOT 34) Full legal on bac~ Page. 3. Street address of petition site (1234 Main Street). [942][ ~i:l[l~icJelD~iJe]']5d0 IB~ac[o~[ ~iJl! 6rJv~ I I I I I II I I 4. Petitioner's Name(Last- First) Address: ;;3] ~ray~:oa D~rive City ~n,~hor~g~ State: Alaska Day Phone Zip: Numbec (907) 344-7283 99507 5. Petitioner's representative IE~t~r~r~s~ ~n~i~e~r~nJ ~n~. I I I I I I I 1 Address: ~335 A~ C~ Anchorage ~te: Ala~Wa Day Phone (907) 563-3835 ~P: 99503 Num~ R-9 pen~irq R-6 244£ OFFICE USE _ REC'D By: '-~,'~ Verify Own: Poster and Affidavit: Fee $ ~ Tentat~e Headng Da~ /~ 6. Current Zoning: 7. Petition Acreage: 8. Grid Number:. 9. Principal Tax Number:. 10. No. of T~x Pamels: 11. CommunityCquncili Hillside ~,~s~ Is this property under a contract for sale or transfer?. Yes [] . No ~ (If yes please fill out informa~on on last page co~c~ming buyer identity) B. I hereby certify that (I am)(I have been authorized to act for) owner of the property described above and that I desire a variance in ~onformance with T'~e 21 of the Anchorage Municipal, Code of Ordinances. I unde~and that payment of the variance application fee is nonmfundable end is to cover the costs associated with processing this application, and that it does not assure approval of the variance. I also understand that assigned hearing dates are tentative and may have to be postponed by Planning Departr~t Staff or the Zoning Board of Examiners and Date: ~'--///~/0 ~--- Signature: .Agont~ mu~t provi. ~witmn proof or ,,uUmriz~~ ~",~ L 2~A-~5/ ,F___~. 20-032 (Rev.8/cj4) MOA CPD PAGE 1 ...~.~.~,._~_ ~-~/~ C. Additional documentation submitted: ×X As-built or proposed site plan to scale Building floor plans to scale Building elevations Photographs D. Date discovered' variance needed: E. Code citations involved: AMC 21. AMC 21 AMC 21 AMC 21~ AMC 21 AMC 21 Topography map of site Building permit Other items F. The existing situation is: See a~tachod I Chapter Section Paragraph Sub-paragraph 21. F. 1. ~ G. Granting the variance will permit: H._.. Please indicate below if any of these events have occurred in the last thru= years on the property Rezoning Subdivision action Conditional use Zoning Variance Site plan review Enforcement action ' Building/Land use permit Case Number Case Number Case Number Case Number Case Number Case Number Permit Number G. The full legal description for legal advertisement (use separate paper if necessary): 1/7. qou+hw~t Northwest 1/4, Section 13. T12N, R3W, S.M.p-Lot 7 Beacon Hills Estates Subdivision I5/~A co~q I-t I 20-032 (Rev.8/94) MOA CPD PAGE 2 The Zoning Board of Examiners and Appeals may only grant a variance if the Board finds that all of the following six (S) conditions are met. Each COndition must have a response in as much detail as it takes to explain how you r petition meets the condition. Please use additional paper if there is not enough room here for your response. The applicant hereby alleges that: 1. Special conditions exist which are peculiar to the land, structure or building involved and which are not applicable to other land, buildings, or structures in the same district. These special conditions are: Strict interpretation of the provisions of the zoning ordinance would deprive the applicant of the rights COmmonly enjoyed by other properties in the same district under the terms of the zoning ordinance. These rights are: Special conditions and cimumstances do not result from the actions of the applicant and such COnditions and circumstances do not merely constitute a pecuniary (monetary) hardship or inconvenience in that: 4. Granting of the vadance will be in harmony with the objectives of the zoning ordinance and not injurious to the neighborhood or otherwise detrimental to the public welfare for the following reasons: 5. Granting the variance will not permit a use that is not otherwise permitted in the district in which the property lies in that: 6. The variance granted is the minimum variance that will make possible a reasonable use of the land, building or structure in that: 20-032 (Rev.8/94) MOA CPD PAGE 3 VARIANCE WITH PENDING SALE OR PROPERTY TRAI~ISFER Applications for variances, where the property is involved in a pending sale or transfer requires that the Zoning Board of Examiners and Appeals be advised of the identity of the buyer and the buyer's lender. The buyer and the buyer's lender wilt be advised of the Zoning Board of Examiners and Appeals's action on the variance. Address: City State: Day Phone Zip: Number. Buyer's lender Address: Day Phone Number. State: Zip: 20-032 (Rev.8/94) MOA CPD PAGE 4 Variance Narrative G. The existing situation is: When the petitioner purchased the property the area was zoned R-9 but was surrounded by R-6 zoned land. The petitioner submitted a rezoning.re~uest from R-9 to R-6. During the process the surrounding property owners received notice of the rezoning and who the petitioner was. The owner of lot 7, Beacon Hills Estates contacted the petitioner to inquire about purchasing a enough land to have a back up location for an on-site septic system. Lot 7 of Beacon Hill Estates Subd~visioni~a_nonconfcu-minglot ofr~ordin, the R-6 zone containing only 10,000 square feet. The owners of lot 7 had to replace a fal!?d septic tank in 1999. The septic drain field isa seepage git~instailed~in 1973. With only 10,000 square feet of lot area there is not a site for a replacement system if the existing one fails. Although the new lot is less than_the_54,_450 square feet required for a R-6 lot it is coming into a situation that is more conforming than the existing nonconforming lot. H. Grantingthe variance will per~-ait: The filing of the preliminary plat with the new Lot 1, McCready Meadows Subdivision being less than the 54,450 square required in the R-6 zone. The lot area of 0.614 (26,730 sq~uare feet) includes ~ ofthe abutting right of way which is permitted in the R-6 zoning district. As pointed out previously this request is a public health issue if the existing septic system fails there is no area for a replacement system. The Zoning Board of Examiners and Appeals may only grant a variance if the Board finds that all of the following six (6) conditions are met. Each condition must have a response in as much detail as it takes to explain how your petition meets the condition. Please use additional paper if there is not enough room here for your response. The applicant hereby alleges that: r Speciatconditions exist which are peculiar to the land involved and which are not applicable to other land in the same district. These special conditions are: Beacon Hills Estates Subdivision was platted prior to the area wide rezoning which rezone the area from U CLlnrestficted) to R-6 (Suburban residential district large-lot). This action made the lots in the subdivision nonconfomdng lots of record governed by Chapter 21.5 5 of Title 21 and more specifically Section 21.55.020 Nonconforming lots of record. Section 21.55.100 Nonconforming parking facilities, loading facilities, signs or other characteristics of use states: "If the characteristic of use, such as signs, off-street parking, off-street loading, lighting or other matters required by this title in relation to specified uses of land, water areas~ structures or premises are not in accord with the requirements of this title, no change shall be made in such characteristics of use which increase nonconformity with such requirements. Change shall be permitted in the direction of conformity to these requirements of this title." emphasis added e The addition of the amount of lot area for this nonconforming lot of record is going in the direction of conformity to these requirement of this title. Strict interpretation of the provisions of the zoning ordinance would deprive the applicant of the rights commonly enjoyed by other properties in the same district under the terms of the zoning ordinance. These rights are: The right to have a replacement area on the lot in ease the existing septic system fails as the tank has in the recent past. The septic drain field installed in 1973, is located under a driveway and has a variance for the encroachment on a property lane setback, due to space limitations on the lot. Special conditions and circumstances do not result from the actions of the applicant and such conditions and circumstances do not merely constitute a pecuniary (monetary) hardship or inconvenience in that: Petitioner did not create the subdivision that was later rezoned to a zoning district that made the lot a nonconfom~ing lot of record. This is not a pecuniary hardship, it is a matter of a public health concern if the existing septic system fails and the ability to have a replacement area. Granting of the variance will be in harmony with the objectives of the zoning ordinance and not injurious to the neighborhood or otherwise detrimental to the public welfare for the following reasons: Increasing the lot area for a nonconforming lot of record is going in the direction of confom-dty. Having an area for a replacement septic system is in the best interest of not only the petitioner but would benefit the neighborhood if and when the existing system fails. This request would be in the public interest. Granting the variance will not permit a use that is not otherwise 10ermitted in the district in which the property lies in that: This is a dimensional variance request and will not permit a use that is not otherwise permitted in the R-6 zone. The variance granted is the minimum variance that will make possible a reasonable use of the land in that: There will be no additional use associated with this variance request. The single family home will continue to exist. The only difference will be the additional land area that can be utilized for a replacement septic system. ! N~ J tt [ I ? ? ~SuB~EcT 10' Utility Esmt. ,/ LOT~ 5 SCALE: 1"-- 80' 1 PROPOSED LOT AREA=20,120 LOT AREA=26,750 LOT 1, S.F. (NET) S.F. (INCL. McCREADY 1/2 ROW) SUBDIVISION Charles Forbes See Connect Time logged in log off Anchorage Property detailed report Parcel ID 001509252 App 000 Landuse Residential 1-Family Property Information Vicinity Map Legal Description BEACON HILL ESTATES LT 7 Owner GORDON THOMAS R & KATHI,EEN J Address 7500 BEACON lqH,L DR ANCHORAGE, AK 99516 Card 01 of 01 Street Address 7500 BEACON HII,L DR Detail Map · ~11 i Zoom: In Out (also see Interactive Map) Recorder's Office Date 05/13/91 Book 2149 Page 0000790 Plat 64-94 (link) Assessed Value Land Building Total 2001 $ 34,000 $172,800 $ 206,800 2000 $ 24,400 $160,900 $185,300 1999 $ 20,000 $161,900 $181,900 Miscellaneous Blue Book Page 190 Zoning R6 Small Grid 2440 Living Units 1 Large Grid 51008 Unit Tax Dist 019 Lot Size 10000 Ownership 0 Leasehold 0 Site Information tli#y Topography Utilities Private Water Street Dirt/Ungraded Access Good Commo~ Traffic Low Wetlands Drainage Good Septic System N/A 0 Structure Information Construction Style 1/2 Story/Othr Ext Wall Wood Quality Grade Excellent Condition Normal Wear & Tear Custom Description Fact: Average ,~'eas Basement 336 Fin/Bsmnt 336 1st Floor 514 I/2 1,218 Floor Roont$ Total 10 Bedroom 3 Rec Room 0 Full Bath 3 1/2 Bath 0 Add~ Fixture 1 (not incl. RR or bath) Heating Type Hot Water System Central Fuel Natural Gas Condo Style Floor Fireplace Stacks 0 Openings 0 Freestand 0 Year Built 1974 Effect 1974 2nd 0 Attic 504 Floor 3rd Floor 0 Recroom 0 Bsmnt Garage 0 Total Living Area 2,016 Site Information Basement 1 st Floor Cov'rd Open Porch Attch/Blt-In Garage Wood Deck 2nd Floor Wood Deck 3rd Floor Feature Area 16 6O8 48 2O3 Ingens TM ,.,v t.725 ~) Copyright t997-2002 help on this page - contact information Publlo Knowledge Systems Chades Forbes See Connect Time Anchorage Property logged in log off detailed report Parcel ID 001509230 App 000 Card 01 of 02 Street Address 9921 HILLSIDE DR Landuse Residential 1-Fsmily Property Information Vicinity Map Legal Description T12N R3W SEC 13 S2SW4NW4 LESS SE4SE4 PARCEL 7 Owner MCCREADY SUZAN A Address 6633 BRAYTON DR ANCHORAGE, AK 99507 ,J Zoom: In Out Detail Map (also see Interactive Map) Recorder's Office Date 12/28/01 Book 2001 Page 0885200 Plat 000000 Assessed Value Land Building Total 2001 $174,600 $143,200 $ 317,800 2000 $174,600 $138,600 $ 313,200 1999 $153,700 $ 98,600 $ 252,300 Miscellaneous Blue Book Page 190 Zoning R9 Small Grid 2440 Large Grid 51008 Unit Tax Dist 002 Living Units 1 Lot Size 740956 Ownership 0 Leasehold 0 Site Information Level Topography Hilly Utilities Private Water Street Type Dirt/Ungraded Access Good Traffic Low Wetlands Drainage Good Commoa Septic System N/A Structure Information Construction S~yle 1/2 Story/Othr Ext Wall Wood Quality Grade Average Condition High Deferred Maint Custom Description Fact: Average Areas Basement 1,296 FilffBsmnt 864 Site Information Basement 1st 1,296 Floor 1/2 Floor 288 1 st Floor Enclosed Storage Coy'rd Open Porch Alea Rooms Total 6 Bedroom 3 Rec Room 0 Full Bath 2 1/2 Bath 0 Addq Fixture 2 (not incl. RR or bath) 2nd Floor 0 Attic 0 3rd Floor 0 Recroom 0 2nd Floor Heating Type Hot Water System Central Fuel Natural Gas Condo Style Floor Fireplace Stacks 0 Openings 0 Freestand 0 Year Built 1968 Effect 1968 Bsmnt Garage 0 Total Living Area 2,376 3rd Floor Feature Area 264 528 Ingens TM = Copyright t997.2002 Public Knowledge Systems help on this page - contact information 10/10/01 AI,A~F~ ST&TIi nlOlrl'GAGE 6633 BmTt, on Dd.v¢ Ancborag~ A.~ 99507 907-,230..5758 l~'002 C~I B~ssler 33:~!S Arctic Boulevard, Su~ 100 .A.nchora~ Alaska 995O3 Subject: Prolx~y ~ 9921 I--~ll~& Drive D~ar Mr. Bassler: April ~, 2002 Alii I ENTERPRISE ENGINEER)NG INCORPORATED - ALASKA Carl Bassler, P.E. Enterprise Engineering, Inc 3335 Arctic Blvd., Suite 100 Anchorage, AK 99503 Subject: · Property at 7500 Beacon Hill Drive Lot 7, Beacon Hill Estates Subdivision Dear Mr. Bassler: As affirmed by my signature below, I authOrize Enterprise Engineering, Inc. to pursue a variance and platting of the subject property. The subject property is proposed to be enlarged by incorporating a portion of the property, to the south, as indicated on the Preliminary Plat for Case No. 10882. lam (we are)the owner(s) of this property. This authorization shall extend from the below date through December 31, 2002. By Date By Date MUNICIPALITY OF ANCHOR. AGE OFFICE OF THE MUNICIPAL ATTORNEY MEMORANDUM DATE: April 2, 2002 TO: Je _r/'y weaver, Planning Supervisor 'an R Fison, Planning THRU: Director 3~k~/ Tm~u:/ William A. Greene, Municipal Attorne FROM: Dennis A. Wheeler, Deputy Municipal Attomey~/ SUBJECT: PLANNING CASE NO. 10882; LoT 7 BEACON I-IH.LS ESTATES; REPLAT OF NONCONFORMING LOT; VARIANCE FROM MINIIMUM LOT $I~i~ REQUIREMENT. QUESTION: You have requested we address the following question: Does a legal nonconfo~',,ing lot of 'record need a variance from the ¢~rrent minimum lot size requirements if the lot is replatted? . . BRIEF ANSWER: Subject to the followihg Background and Discussion, our Brief Answer is yes. BACKGROUND: Lot 7 is a legal nonconforming lot of record (Plat 69-64) consisting of approximately 10,000 sq. feet that is zoned R-6 (GAAB Ordinance 74-84A), which requires a minimum lot size of 1.25 acres (54,450 sq. feet). Lot 7 is currently proposed to be expanded to 26,745 sq. feet as part of a replat of a larger parcel that will, excluding lot 7, result in 11 lots that are each over the minim~]m lot requirement. Only lot 7 (to be redesignated as lot 1 of the new subdivision) will be undersized. DISCUSSION: Nonconforming lots of record are governed by Anchorage MuniciPal Code (AMC) section' 21.55.020, which allows residential construction on noncon-fol'J~,ing lots. The chapter on nonconfox'afities is silent as to whether replatting nonconforming lots requires full compliance with nninimnm lot size requirements. ~'erry Weaver April 2, 2002 Page 2 of 3 Nonconformities are not to .be perpetuated and are declared incompatible under AMC 21.55.0.10: Within the zoning districts established by this title or' amendments that may later be adopted, there may exist lots, structures, uses of land and structures, and characteristics of use which were lawful before the effective date of the .applicable regulations, but which would be prohibited, regulated or restricted under the terms of chapters 21.35 through 21.50 or future amendments. It is the intent of this chapter to pemdt these non- conformities to continue until they are removed, but not to encourage their perpetuation. It is further the intent of this chapter that nonconformities shall not be enlarged upon, expanded or extended, or be used as grounds for adding other structures or uses prohibited elsewhere in the same district. (Emphasis added.) In addition, the remainder of Title 21 clearly applies to resubdivisions. See, e.g. A1VIC 21.75.020 and the definition of resubdivision in AMC 21.75.030. The ieplat is a resubdivision, at least as to lot 7, which triggers compliance with both AMC 21.40 (zoning districts - lot size) and AMC 21.80.300, Design standards - lot dimensions (which cross-references AMC 21.40). ' Given the expression of intent in 21.55.010 and the lack of any provision expressly on- point allowing a nonconfomdng lot to move towards partial compliance, in what is otherwise a comprehensive land use regulatory scheme, the only conclusion to be drawn is that the variance procedure is the only available avenue to get approval for the proposed undersized lot.~ Otherwise, the petitioner must reconfigure the' lot so as to make it conforming under current code or not replat the lot. If the variance is applied for and received, the lot shall be deemed a conforming lot by virtue of the variance. It shall no longer be deemed nonconfom-dng. See, e.g. A/VIC 21.55.110. The variance should describe the loss of nonconforming rights regarding the lot size and should describe in detail the applicable setback standards (those of the R-6 district), Staff should address whether a variance is also required for the dimensional requirements in 21.80.300. Also, any existing slructures may' retain their status as nonconforming structures (if such status currently exists), at least as to certain attributes. For instance, the current structure(s) might be within a setback. They may be nonconfo, ming structures in that regard. t We express no opinion on whether the proposed lot meets the requirements for a variance. ", Jerry Weaver April 2, 2002 Page 3 of 3 CONCLUSION: ' A nonconforming lot may not be replat~ed unless the replat makes the proposed lot conforming or there is a variance from the minimum lot size reopirement(s). cc: Steve Ellis; Co{lc Enforcement Manager G:LMAT~OPEN/VIATTERSWariance for replat of nonconforming Iot\4-2 op~rdon. DOC Municipality of Anchorage P.O. Box 1 96650 Anchorage, Alaska 99519-6650 'Telephone: (907) 3434309 Fax: (907) 343-4220 http://ww~v.ci.anchorage.ak, us George F>. Wuerch, Mayor DEPARTMENT OF PLANNING March 12, 2002 Suzan McCready for the'Estate of Mary Robinson Fmnhe c/o 6631 Brayton Drive Anchorage, AK 99507 FILE COPY Dear Applicant: On Wednesday, March 06, 2002, the Platting Authority acted on your petition S 1 0882 T12N R3W Sect 13/McCready Meadows Subdivision (variances) The petitition was APPROVED. Special COnditions, in addition to those of Title 21, attached by the Platting Authority are. on the enclosed Summary of action. If you have any questions on these condition s or changes, please call our office at 343-4267. PRELIMINARY APPROVAL IS VALID ONLY FOR 18 MONTHS oras otherwise stated in the Summary of Action. Within that time, you must accomplish the following to finalize your request: 1. Negotiate a subdivision agreement with the Department of Public Works, if required. 2. Meet the conditions specified by the Plaffing Authority which are included in the attached Summary .of Action in addition to those of Title 21 of the AMC. 3. C.omply with all applicable provisions of the Municipal Land Subdivision RegUlations. 4. In the case of subdivision, submit to the Department of Planning a propedy executed final plat ready for filing. If you wish to appeal this decision or any of the condtions, we will furnish copies of our appeal procedures. Please note that all appeals must be made within fifteen (1 5) days of the Platting Board's action. Sincerely, DEPARTMENT OF PLANNING Zoning and Platting Section cc: Enterprise Engineering 3335 Arctic Blvd Suite 100 Anchorage, AK 995030000 Page 13 12. Obtaining ADEC approval for any- development on tht~'property. Entering into a Subdivision ,A~o'reement with Development Services for:.. Co_n.~t~-ction of Olympic Te~ce Circle to M-nicipaI standards. ConstruCtion of I0-foot walkway to M-nicipal standards and resolving, the need for any gating in the fence.. Street ~ame signs, street lighting and. tr~c control devises. S~nital'y. ~c-wer ~-nd .publtc ' water extensions and relocations. e.. 'Stoa,m, drainage. The final plat may not be recorded :until such _time ~.~ a sUbterranean sto~,~ drain system is inst~lled in East 72nd Avenue or ~v~other suitable ouffa]! is prqvided and aPproved'bY Project Management-and E~neering. f. S-10882 McCready Meadows Subdivision wlth variances The variance from the 1.25-acre minimum 10t size required by the R-6 zoning regulations for proposed' Lot 1, McCready Meadows Subdivision was. not addressed as the Platting Board does not h~ve jurisdiction to grant a variance from A1VIC 2i.40.080.F. Approval of the plat subject to: Resolvir~ with the Wetlands' Coordinator, planning Department the additional hydrol0gic~l and drainage information needed for development of this site as req~tred by the Anchorage Wetlonds Managemer~t Plan. e Modi~,'.. gthe preliminary pIat to; el~sure', that: Proposed Lot 6 meets the v~idth-to-dept~ ratio requirement of AMC 2~I.80,300. A~ variance from the Platting Board is rec,,ired in the alternative. The st~actures on proposed Lot 6 conf0~,~ to the reqntred 50-foot rear and 25~foot side yard setbaal~s of th~ R-6 zoning district. Va~nces from the Zonirlg Board Of ~.~nminers ad' Appenls are reqnired if encroa~-hments exist on the lot n-~ designed. The 'building foundation' .on proposed Lot t conf0i-ls to the 50-foot front yard setback of the. R-6 zonin~ district, ~ varinnce from Zontllg Board of Exnmtr~er~ .nnd Appe~l.~ ~ req?tred in the alternstlve..' Vehicular access from proposed'Lot 5 Will be provided to McCready Circle via a flag lot configuration as ADOT is prohibiting direct vehicular access to Hillside.Drive. Showing only- the area within the lot lines and providing a separate t~ble to show the lot areas including .the ~llowallces for dedicated ~ight-of-way' and lot variation nllowed by the R.6 zoning district regulations. Resolving with the planning Department' the need to meet the current R-6 mi~irn, m. lot area reqnirement to include existing Lot 7, .Beacon' Hill Estates in the pl'elirnirl~ry plat.. Resolving u~lity easements. Entering into a Subdivision agreement with the Private Development Section to: Sm~nary oil-Attire ~ March 6, 200~ .. '4 Resolving the following Wttl~ Pro~[ .e~. t Management a_. 'A site grading and 'drainage plan' and erosion and · sediment . coi!trol' .. pla~'t · :~ submitted to Public Works f'or appr.~al'.-' b. ' :Th6'ii6ed for dratnng~ tmpx-ov~_ments anc~ · ..: .:.!' Management and Engin. e.e .'.r!a:~r<?, . ?... .... ' . c... >The need.for we.tland~ prot~ct~o~ setbaelr~ '- appropriate . horizontal :. ,¢. mad !~ vertical ? , -eidratio ._-for : ."deC ot>i ent/to work.- for'a p' _ .... approved copies to b~"ffied with BUtIding ~fetY 'and the Planning Departmeht~ ee ~ Storm Water Treatment l~lan submitted to PUblic Works for review-~d' approval. Wastewate2/SerrlCes?!nf°,;;', ~dil~'~°i Sa~._~ithe ...- rec[ui~einent~ of AMC; 21.I5- anr~ AMC.-115.65 for each Iot ii/the Si~bdiviSi°n th~t~clude~;, but i;~i not necessarily limited to-the for .owtng~';i? momm~ 'mmtj~.b~ 99~d~ma ..d~ . Areas'~ d~s~_-ated' for, .*_the 'original - and replacement' .w. UStewater sites must be~ide=tt6ed and must m~etf criteria' split, ed in AMC !5.65. tncl~rli~g slope and slope setbaok req-trement~. Topographical info ~r!!a~ atlon must be submtttecL Supporting documentation on water availability must be provided. Placing the following notes on the plat: 'AcceSs to'i4tllsideDrlve is' p~ohi, bited from 'Lots 2';'314 ~ndl 5.'- A nbte": (S'.,~ting[':':~hat~' the ' p~0pe~tyl; fmpacteq by.Type B wetlands and. permit, that a permit from the A, of Engineers prior to any disturbance- within the wetlands including removal of vegetation., g~. dtrlg or flllirlg. 9. M~k-ing the followha_g drafting correctioxm: Street Names: Change Olympic Street to Conifer Street~ Also, the end Of I-l~mpton Drive, shown as a cul-de-sac in this platted area, will necessitate the street type change from Drive to Circle, for the portion of the street from McLure Circle to the cul-de-sac, This will require all address points along that portion to change their address, slightly, from Drive to' Circle. Plattlng~Boax'd~ ;.' Sunmm~ of Action Ce Street N~mes, vicinity m~p: Clarify where I-Itll,~ide Drive changes to Nettleton Drive. ~s it is not Iabeled on this plat. Als0, the portion east of Hillside is U~PER O'Malle3r R~ad. Map Info~,..~tion: Correct the spelling of Thaye~,..oore Heights (plat P-674), note the addition of Prospect Height~ Subdivision Addition'# 1 (pl~t 67.157), and the unit of H~mpton 14tlls Ullit # 1 {pht 76- 141). PERSONS TO BE HI~ARD REPORTS 1. Cb~ir The Board Members request that the monthly meeting with the .Director held on the 4m Monday of the -%~onth at 4:00 p,m. resume as it is a good forum for discussing issues that arise duri~4~ the public hearings and keeping 'up to date on the latest current planning developments. 'Mr. Weaver agreed and responded that the meetings v~-ll be held fro-,, now on. 2. Secretary Commu.ntty Adjotu- at 9:55 p.m. 9ent BY: J A MunteP; 348 8692; Nov-5-02 2:42PM; A1=,,,._.t~j_Op- O~:~_51p pm~-m'i't, Coun~t'e'v' Page 2 ....-,- pege 2 J~nusry 28. 2002 ~ slope tnfo~O~ m~ be ~b~. propo~ ~bat~, ~e ~f~ ~est ~h~ ~ one p~p~ we~t ~d ~ mi~m~ of ~o obs~e~ou w~ls. ~s ~ ~11 sh~ ~t th~ is ~ · e p~poe~ Sub~ ~ ~O ~C~ of t~ ~zo~ of wat~ ~ $~ ~s ~b~v~ou on s~o~n~ p~' 5. A ~t~ model ~ ~'s ~ sh~ be ~b~ued s~ t~t the d~elo~ of ~s sub~on will ~vu no a~s= effec~ on ~ exi~ng Sent By: J A Munter; 348 8692; Nov-5-02 2:42PM; Page 3 Three water wells shall be drilled on three adjacent lots within thc proposed subdivision. The hydrogeologist shall determine the separation distances between these wells, which shall be between 50 and 300 feet. Larger separation distances may be justified based on inlbnnation obtained when drilling the first well. Pinal well layout shall be approved by DSD, The middle well shall be pumped for a period of 2 to 4 hours to obtain data to determine the approximate transmissivity of this well. At, er allowing the well to recover at least 90% of the measured drawdown, a 24-hour pump test shall be conducted. Thc 24-hour pump test shall be conducted at a constant discharge rate that will cause 70% or greater drawdown in the well. During this pumping test, the remaining two wells shall be monitored and data shall be collected to determine the aquifer transmissivity, the storage coefficient (if possible), the long-term production capacity of the well and the likely or predicted impact on summnding wells. Following thc 24-hour pump test, each well shall be monitored during the first 24 hours of recovery. Data from the recover7 test shall be used to verify the aquifer transmissivity. [f either o[the other two wells does not draw down during the initial aquifer test, these wells will also be tested with a 24-hour drawdown test tbllowing the procedures above. Otherwise, the other two wells shall be pumped for a period ora to 8 hours to determine their approximate transmissivity and long-tem~ production capacity. All of the data obtained from these tests shalt he submitted to the Developmeot Services Depamx~ent along with a summary and inlerpretation done by the hydrogeologist. / 3 · ;5o...._~z// WE~DS '26~9 · _ ~._ ~ ,,' -. _ .... --" I~ N89 49 59 E 9&1.92' 20' Utility EsmL 20A-2 ~1 ~ R-6 .~[ LAKEWOOD HILLS l 66.89 ,o'--Te~'. ~ ~c. Sent By: J A MunteP; 348 8692; Nov-5-02 2:43PMj Page 5 Municipality of Anchor. age Department of Health and Human Services 825 "L" Street P,O. Box 196650 Anchorage, Alaska 99519-6650 Ric~ My~trom h~up: I/vN,flv. ci. a~,ct~or age ,ak, u ~ Mayor Permit Number: #SW ~ Date of Issue: ~ Parcel Identification Number: Date Started: 10-23-02 Date Completed: '10..2.4~02 ]s well located at approved pem~it location? [] Yes ~'~ Plo Legal Description; M¢Creedy Meadows ~J,~O ~ ~ Property Owner Name & Address: Susan M~Cready B0rohole Data: .... ' Depth (fl) Soil 'l~/pe, Thickness & Water St~a~ From To sClC, k-up 0 2 organics & silt 2 5 gravelly silt 5 32 silty gravel 32 4 7 gravel 47 65 silty gravel 65 77 sandy silt 7'7 84 sffty gravel 84 115 oobbly silty gravel 117 136 ~andy silt 136 164 grevelly silt 164 172 silt 172 185 c/ay 185 213 gravelly silt 213 235 silty water sand & gravel 235 24 t gravelly silt 241 262 bedrock 262 274 Method of Driilin r rotary [] cable tool Casing type: steel Wall 't'hickness: ,_2~0 inches Diameter: _6 inches Depth: ~ [bet Liner Type: __ . Diameter: inches Depth: ~ feet Casing stickup above gronnd: --2 feet Static water lc'vd (from ground level): 22f feet Pumping level: see vumo test.._fee~ after _2 hours pumping ,,f.,5+ gpm Recovery Rate: ~5+ gpm Method of Testing: eir lift Well Intake Opening Type: [] Open End [] Open Hole [] Screened Slart . fe~t Stopped ,,. feet [] Perforations Start ,~ feet Stopped 24J, feet Grout Type: .b. ent. on~t¢ Volume: 1 bg Depth: Start O fe~t Stopped ? Pump: Intake Depth. feet Pump size hp Brand Name Well Diaitlfectcd Upon Completion? [] Yes [] No Method .o.f Dislnfeefion:. chlorine Commenta: ,Vee pump test W~ll Driller: Alpine Drilling & Enterpdses PO Box 110496 Anchorage Alaska 995I 1 Attention: The well driller shall provide a welt Log to the property owner within 30 days of ~ompletiott and the property Sent By: J A Uuntep; 348 8692; Nov-5-02 2:44PM; Page Municipality of Anchor. age Department of Heaith and Human Serwces 825 "L' Street P.O. Box 196650 Anchorage, Alaska gg519~6650 ~ MystrO~ http:l~vww.ci,enchorege.ak, us Mayor Permit Number:. #SW ~ Date of ls~ue: _ Parcel Identification Number: Dat~ Started: t0-23-02 Date Completed:_!0-2.4-O2 Is well located at approved permit location? [] Yes [] No Legal Dmeripfion: McCre. adv Meadows Big 0 Lt. 4 Property Owner Name & Addresa: Susan McCready °"hole .*tai -- Depth Soil TYpe, Thickness & W~ter Stra~ From To ~t~.up 0 2 gravelly silt 5 35 sifly grovel 35 45 gmv~ 45 65 ~!~ gravet ~ ~n~ si~ 80 si~ gmvet 86 112 si~ 112 117 ~y si~ 140 ~63 ~avel~ 8~ 1~3 170 si~ ~70 day 185 215 gravelly si8 215 237 si~ water se~d &gmvet 237 242 grevel~ sift 242 2~ ~rock 263 274 Method of Drilling [] al~ rotary [] cable toot Casing type: ,s. tee! Wall Thicknc$~: .250 inches Diameter: 6 inches DqXh: 266 f~et Liner Type: , Diameter: inches Depth: feet Casing stickup above ground: ~ feet Static water level (from ground levcO: 2-~Lfeet Pumping level: see ou~o test fcc[ _2 hours pumping 1,§+ gpm Recovery Rate: 15+ gpm Method of Testing: e/r_f3~ Well Intake Opening Type: r-lo~n Ena [] Ope~ tiote [] Screened Start ........ feet Stopped fe~t [] Perforations Start 23,8,. feet Stopped ~42 fe~t Grout ~ype: .bentonite Volume: Depth; Start 0_. feet Stopp~d ~9 feet Pump: Intake Depth ,, feet Well Di~infeeted Upon Completion.* [] Yes [] No Method of Di~inf~tion: ch/odn~ tablets Comment~: See pump lest Well Driller: Alpine Ddtling & Enterprises PO Box 110496 Anchorage Alezka 995 ~ 1 Attention:, The well driliex shall provide a.w,?l log to the property owner within 30 days of completion and the proverty Sent By: d A Muntenj 348 8692; Nov-5-02 2:44P~; Page 7 Well Information r log Dot available This in~o~ation ob~aine~ fr~: ~ &¢5 .... Diameter of well: Location map (sketch): {:"'~"~'~' ~ 't Sent By: J A Munter; OC.T-:~I--ZI~IO~ ! 1:5? AM 348 8692~ N~v-5-02 2:44PM; Page 8 ,' 0 ~ent By: d A MunteP; Nov-5-02 2:44PM; Page 9 P.~ ~ent By: J A Uunten; 348 8692~ NOV-5-02 2:45Pt~; Page 10 NO%t-~-~O~2 11 ::~ gJl'J P,O1 I Sent By: ~ A I~unteP] 348 8~92j Nov-5-02 2:45PM; Page 11 P.~2 GPM, ' Sent By: J A Muntep; 348 8692; Page 12/21 "l Sent By: d A MuntePj Time Nov-5-02 2:45PM; Page 13/21 Sent By: J A Munter; 348 8692; Nov-5-02 2:45PM; Page 14/21 Nov-5-02 2:46PM; Page 15/21 I t4~l i GPM Sent By: J A MunteP; 348 8692; Nov-5-02 2:46PMj Page 16/21 WATI~RWELL - TEST PUMP REFORT I ) I , !L Sent By: d A Munteo; 848 8692; Nov-5-02 2:46PM; Page 17/21 Time GPM J I Sent By: J A Uunter; 348 8692; Nov-5-02 2:46P~; Page 18/21 ,._o~. ,. ~qent Ely: J A Munter; 348 BBg2; Nov-5-02 2:47P~; Page 19/21 nt,b, '~ ath Sent By: d A MunteP; 348 8692 Nov-5-02 2:47PM; Well Information: Total Depth: __ Depth ofCa~i~: _ .. ~ ~: ~ Diem: ,,, Time Page 20121 · -(-'g. ¢% ~ Front To Air l,l~e Depth: __CPM, Max Drawdwn: , Sent By: J A MunteP; 348 8692; Nov-5-02 2:47PM; Page 21/21 J. A. MUNTER CONSULTING, INC. November 6, 2002 Ms. Suzan McCready Alaska State Mortgage Company 6633 Brayton Drive Anchorage, AK 99507 Re: Evaluation of potential well impacts at McCready Meadows Subdivision, Anchorage Dear Ms. McCready: This letter is to present the findings of recent aquifer evaluation and testing performed at McCready Meadows Subdivision in Anchorage. The purpose of the testing is to show that "there is an adequate water supply to support the proposed subdivision and effects of the appropriation of water to serve this subdivision on surrounding properties" (J. Cross, written commun. Jan 28, 2002). Background McCready Meadows Subdivision has received preliminary plat approval and has been referred to the Department of Development Services for approval subject to a finding that there are adequate reserves of water for the 12 platted lots without affecting surrounding property owners. Water will be obtained from on-site wells at each lot, which is consistent with surrounding development. Mr. Cross provided guidance on performing aquifer testing at the subdivision to meet MOA requirements (see attached). Test pumping was performed between October 30, 2002 and November 6, 2002, generally according to the MOA guidelines. Sources of Data and Methods The following sources of information and methods were used to conduct this evaluation: · Topographic maps showing general slope and hydrography information. · Climatic information for estimating water budgets; · Reports to agencies of any well problems in the area; · Well logs for surrounding lots typically providing information on depth, yield, and water levels; · Data from two newly drilled wells on the property and one pre-existing well; · aquifer test data collected from separate pumping of all three wells on the property. Reports on Well Problems to Local Agencies Representatives of the Municipality of Anchorage and the Alaska Departments of Natural Resources were contacted to determine whether there were any reports of well problems or concerns in the project area. Persons contacted were: 5701 PENNY CIRCLE, ANCHORAGE, AK, 99516 j amunter~arctic.net PHONE(907) 345-0165; FAX (907) 348-8592 J. A. MUNTER CONSULTING, INC. Jim Cross, MOA Roy Ireland, ADNR Kelly Westphal, ADNR All persons contacted reported that they were not aware of any reports of well yield problems or concerns related to inadequate water in the area. This is an indication that aquifer depletions are not occurring in the project area. Hydrologic Setting The subdivision is located in the basin of the North Fork of Little Campbell Creek in Anchorage. The site is in the lower foothills of the Chugach Mountains at an elevation between 700 and 800 ft above sea level. Glacial drift deposits are generally between 200 and 300 fi thick in the project area (Glass, 1988) and contain the primary aquifer at the site. Beneath the glacial drift aquifer is a fracture metamorphic rock aquifer consisting of argillite, greywacke, and related rock types (Dearborn and Barnwell, 1975). Following is a summary table of information from 18 representative well logs from surrounding lots obtained from State and MOA databases. Six of the wells tap a bedrock aquifer and 12 wells tap sand and gravel aquifers. The sand and gravel aquifers occur at a variety of depths ranging from 40 ft to over 200 feet below ground surface. Transmissivities were estimated using the formula: T=2000 x specific capacity, where specific capacity=reported yield/drawdown (Driscoll, 1986). Full drawdown is assumed where data were lacking, resulting in a conservative (low) estimate ofT. Table 1. Summary of well data near McCready Meadows Subdivision Location depth Reported Estimated Aquifer Static water level yield in gpm Transmis- in feet below sivity (gpd/ft) ground surface L. 2, Beacon Hill 198 10 800 Clean Gravel 168 Estates L. 7, Beacon Hill 217 20 2400 Sand and 195 Estates Gravel L. 1 B. 1, 143 7 560 Bedrock 112 Prospect Hts #5 L. 5 B. 1, 205 5 110 Bedrock 110 Prospect Hts #5 L. 6, Beacon Hill 200 7 470 Gravel and 155 Estates Sand L. 5A, B. 6, 170 10 570 Clean gravel 130 Prospect Hts #5 5701 PENNY CIRCLE, ANCHORAGE, AK, 99516 j amunter ~(~,arctic .net PHONE(907) 345-0165; FAX (907) 348-8592 J. A. MUNTER CONSULTING, INC. Location depth Reported Estimated Aquifer Static water level yield in gpm Transmis- in feet below sivity (gpd/ft) ground surface L. 7A, B. 6, 40 25 12,500 Sand and 9 Prospect Hts #5 Gravel L. 9A, B. 6, 251 2.5 50 Decomposed 143 Prospect Hts #5 Bedrock L. 4 B. 2, 93 15 790 Gravel 50 Hampton Hills L. 2 B. 2, 201 4 100 Bedrock 114 Hampton Hills L. 1 B. 2, 118 10 710 Sand and 85 Hampton Hills Gravel L. 15 B. 2, 139 30+ 10,000 Sand and 117 Hampton Hills Gravel L. 14 B. 2, 340 7 4,700 Gravel, Silty 145 Hampton Hills and Sandy (perf. 177-184) L. 14 B. 2, 300 3.5 44 Bedrock 140 Hampton Hills L. 17A, 206 40 980 Sand and 124 Lakewood Hills Gravel L. 5, Nettle- ton 120 8 400 Gravel, silty,80 Acres # 1 clayey L. 6, B. I, 195 10 270 Silty Gravel 115 Wildwood Glen L. 3, B. 1, 404 1.5 Unknown Bedrock Unknown Wildwood Glen Summary of Well Data Review Reported well yields range from 1.5 gpm to 40 gpm, with the median well yield of 9 gpm. Static water levels range in depth from 9 fi to 195 ft below land surface. Well depths range from 40 ft to 340 fi. All wells show a reported well yield of greater than 1.5 gpm, which is equivalent to 2160 gpd, which is approximately four times the typical daily demand for a single family residence. The median well yield of 9 gpm is approximately 27 times the typical daily demand for a home. The yield data presented in Table 1 show that wells in the project area are capable of supplying sufficient water for single family homes on an on-going basis. Estimated transmissivity values range from 44 to 12,500 gpd/sq ft. The median transmissivity value is 640 gpd/ft. Assuming a typical 10 foot aquifer thickness, this value is typical of silty sand aquifers (Freeze and Cherry, p. 29). 5701 PENNY CIRCLE, ANCHORAGE, AK, 99516 iamtmter(~_ ,arctic.net PHONE (907) 345-0165; FAX (907) 348-8592 J. A. MUNTER CONSULTING, INC. Water Budget, Groundwater Supply Potential, and Surrounding Development Regional data indicate that average annual precipitation in this part of Anchorage is approximately 20 inches/year. Assuming approximately 20 percent of this amount recharges groundwater, then the 17.5 acre tract should be recharged by an average of approximately 5,200 gallons/day of water. This amount of water equates to 430 gallons per day each for the 12 planned homes on the tract, which is approximately equivalent to the amount of water that a typical home would use. Dearborn and Barnwell (1975) studied the Anchorage Hillside area to determine the long-term potential yield of water-supply aquifers. They concluded that the sustainable yield of groundwater aquifers in areas underlain by glacial drift aquifers was in the range of 2-4 million gallons per day for their study area. This equates to 4,000-8,000 gallons per day for a 17.5 acre tract, or 300 to 600 gallons per day for each of 12 homes on a 17.5-acre tract. Their study shows that groundwater supplies in the project area are likely capable of supporting residential development as proposed. The proposed subdivision, with an average lot size of 1.46 acres per lot, is consistent with surrounding residential development, which does not appear to have resulted in groundwater depletions in the area. This represents a small marginal increase in development of the area with on-site wells. Such a marginal increase in development in the area would not be expected to exert a significant effect on wells of surrounding property owners. Well Drilling and Aquifer Testing Two wells were drilled during October, 2002, as described on the attached well logs. For the purposes of this report, the first well drilled, on Lot 3, is termed Well 3, and the second well drilled, on Lot 4, is termed Well 2. Well 2 was selected as the well for the first 24-hr aquifer test because it is in between the two observation wells. The pre-existing well on Lot 6 is termed Well 1 (see attached map). Well 3 is 42 f-t from Well 2, and Well 1 is approximately 295 ft from well 2. It was intended to drill Well 2 more than 50 fi from Well 3, however, difficult site access on the forested, sloping site with wet, silty, unfrozen soils prevented rig access beyond the location drilled. Subsequent review indicated that the analysis of the aquifer test data was not adversely affected by the well spacing being less than planned. Wells 2 and 3 tap a silty sand and gravel aquifer at a depth of approximately 235-242 ft at both well sites. Well 1 reportedly encountered bedrock at 300 ft and was drilled to a total depth of 340 ft. The pumping and water level data were collected by Mr. Brian Wille and Mr. Joe Tolles of Aarow Pump and Well Service, LLC, and me. The pre-existing well (Well 1) is observed to have a static water level of approximately 258 fi below land surface, perforated casing around 280 ft (from a television camera inspection of the casing) and a casing depth of approximately 300 ft and a total depth of 340 ft (see attached lwell record). The reported yield of the well is unknown. 5701 PENNY CIRCLE, ANCHORAGE, AK, 99516 iamunter~,arctic.net PHONE(907) 345-0165; FAX (907) 348-8592 J. A. MUNTER CONSULTING, INC. Results of Testing Well 2 A 4-hr step~drawdown test was performed at Well 2 at stepped flow rates of 6, 10.6, and 15.8 gpm (see attached data). The well exhibited 8.2 ft of drawdown at the end of the testing period. This represents approximately 75% of the available drawdown of 11 fi (235 ft to top of pump minus 224 ft static water level). Based on this test the 24-hr test pump rate target was set at 15 gpm. Well 3 exhibited a maximum drawdown of 0.12 fi during the 24-hr test and was analyzed according to Jacob's method to yield a calculated transmissivity of 15,000 gpd/ft and a storativity of 0.00023, which are both reasonable values for a confined sand and gravel aquifer. The pumped well (Well 2) showed a maximum drawdown of 6.9 ft and the data were also analyzed by Jacob's method to yield an estimate transmissivity of 6600 gpd/ft. While somewhat lower than the value calculated from the observation well data, both values are reasonable and within the range of values estimated from the review of area well logs provided in Table 1. Storativity of the aquifer is not calculable with drawdown data from the production well. Data collected from Well 1 during the test showed no evidence of drawdown. The water level in Well 3 recovered and stabilized within 24 minutes of shutdown to a level 0.05 ft below the initial static water level. The water level in Well 2 recovered and stabilized within three minutes of shutdown. Transmissivity values calculated from the recovery data were 150,000 gpd/ft (Well 3) and 2300 gpd/ft (Well 2). While these values vary somewhat from values calculated during drawdown, they verify the general range of aquifer transmissivities present at the site. Results of Testing Well 3 Well 3 was tested on November 2, 2002, at a constant rate of 15.1 gpm (the maximum rate of the test pump) for 4 hours (see attached data). The well exhibited 0.78 ft of drawdown after 0.75 min of pumping and stabilized for the remainder of the test. The well recovered to its pre- pumping water level after one minute of recovery. This indicates that the aquifer at this location is potentially capable of yielding over 100 gpm of water, although further testing would be required to confirm the sustainability of that rate. This test confirms the generally high value of transmissivity calculated from the recovery data from the Well 2 test for the aquifer at this well location. Results of Testing Well 1 A 24-hr flow test was conducted on Well 1 on November 5 and 6, 2002. The pumping rate averaged 0.3 gpm, and a maximum drawdown of 18.0 ft was observed. After approximately 500 minutes of pumping, the drawdown essentially stabilized for the remainder of the test. These data suggest that the drawdown cone encountered a recharge-type boundary condition or experienced gravity drainage of water from pore spaces in the aquifer late in the test. No drawdown effects were observed in Well 2 or Well 3. 5701 PENNY CIRCLE, ANCHORAGE, AK, 99516 j amunter(&~arctic.net PHONE (907) 345-0165; F~x (907) 348-8592 J. A. MUNTER CONSULTING, INC. Analysis of drawdown data indicates that the transmissivity of the aquifer is approximately 13 gpd/ft, and analysis of the recovery data suggests that the transmissivity is approximately 72 gpd/ft. The difference in values calculated indicates that the aquifer or aquifers tested varied somewhat from the uniform conditions assumed for the calculations. Both observed transmissivity values, however, are near the Iow end of the range of values estimated from surrounding wells, and are consistent with typical values expected of bedrock aquifers in the area (see Table 1). There is some uncertainty regarding the condition of the well and the source of water into the well, s~nce a log of the well is not available, and the well appears to be perforated at a sand and gravel aquifer in addition to the bedrock penetration. Apparently drilled in the mid-1960s, the well may also be affected by encmstation or plugging of well openings, bedrock fractures, or pore spaces adjacent to the well. Impact Projections A Theis analysis is commonly used to project the impacts of pumping a confined aquifer. Freeze and Cherry (1979) state that "if the aquifer properties, T (transmissivity) and $ (storativity), and the pumping rate, Q, are known, it is possible to predict the drawdown in hydraulic head in a confined aquifer at any distance r from a well at any time t after the start of pumping". Wells 2 and 3 are centrally located in the subdivision, and it is expected that most of the wells in the subdivision will be tapping a sand and gravel aquifer similar to that tested by those wells. For projecting the effects of long-term pumping for this aquifer at a typical domestic use rate of 450 gpd, and the lower, more conservative value of T obtained from the data from Well 2 (6600 gpd/ft), and S=0.00023, a calculated drawdown 0.04 ft is calculated for a well that is 100 ft away from the pumping well after 30 years of pumping. This illustrates that the expected impacts from any single domestic well are expected to be negligible, even using very conservative assumptions. Even assuming that all water from the 12-lot subdivision would be extracted from one well near the center of the subdivision, only 0.9 ft of drawdown is calculated for a well located 300 ft away after 30 years of pumping. This assumes no recharge, which is highly conservative. Even at a distance of 100 ft, only 1.0 ft of drawdown is calculated. This is also a negligible amount of drawdown, considering the available drawdown in wells in the vicinity. Conclusions Groundwater conditions at McCready Meadows have been extensively studied using existing data sources and has been tested on-site with two newly drilled wells and one existing well. The two new wells are each capable of yielding in excess of 15 gpm, while the existing well is a lower-yielding well that appears to tap both a sand and gravel aquifer and a bedrock aquifer. Existing aquifer testing, water level, well yield, and water budget data all consistently indicate that adequate water supplies are available from wells at McCready Meadows Subdivision without adversely affecting nearby well users. The aquifer does not exhibit evidence of long- 5701 PENNY CIRCLE, ANCHORAGE, AK, 99516 jamttnter@,arctic.net PHONE (907) 345-0165; FAX (907) 348-8592 J. A. MUNTER CONSULTING, INC. term, area-wide stress from existing development. All new wells are expected to exceed MOA requirements for well yield. The aquifer testing requirements of the MOA have been met, and the required approvals for on- site wells for McCready Meadows Subdivision should be issued. Should you have any questions, please call me at 345-0165 or 727-6310. Thank you. Sincerely, J~nes A. Munter, Certified Ground Water Professional Principal Hydrogeologist References Cited: Dearborn, L.L., and W. W. Bamwell, 1975, Hydrology for Land-Use Planning, The Hillside area, Anchorage, Alaska, US Geological Survey OFR 75-105. Driscoll, Fletcher, 1986, Groundwater and Wells, Johnson Div., UOP, St. Paul Minnesota. Freeze, R. A., and J. A. Cherry, 1979, Groundwater, Prentice Hall, Englewood Cliffs, NJ, 604 p. Glass, R. L., 1988, Map Showing Depth to Bedrock, Anchorage, AK, U.S. Geological Survey Open File Report 88-198, scale1:25000, 1 sheet. Attachments MOA test guidance Site Map (1 sheet) Well Logs (2 p.) and ADNR well record (1 p.) Test Data Sheets (14 p.) 5701 PENNY CIRCLE, ANCHORAGE, AK, 99516 j amun ter _~,,arct lc.net PHONE (907) 345-0165; F;~X (907) 348-8592 Apr-~.9-02 03-:ZSP pe¥-mil; CoUnter 907 343 8250 Comment's on Ca.~es due 2/~/02 January~B, 2002 Pete 2 disposa! systems. Grotmd w~tcr monitoring mu~tbe conduct~ ~o~d wa~ s~on in rather th~ f~l (Octob~) or sp~ si~ m~t b~ idmfified ~d m~t m~ at1 cfi~a ~cc~fi~ in ~C IS ~cluding slop~ ~d s~ack teq~rem~. 3. Topo~hic~ sl~e info~agon m~ be sub,lite. 4. M ~uif~ test ~ h~olo~st's repo~ sh~l be conducted ~thi~ th~ propos~ subdi~, ~c ~ ~est sh~] i~cl~e one p~p~g well miuim~ of two obs~afion wells. T~s t~t ~11 show ~at there is ~ ~eq~te w~ ~pl~ to s~po~ the proposed sab~vidon ~d ~e the ~ropdat/on ofwaer to s~e ~s s~bdi~ision on s~o~ 5. A nitrate model oi ~noor's ~on shall be ~b~ed showin8 that ~volo~t oft~s subdivision will ~w no adverse e~ccts on ~c webs se~i~ ~ s~o~ prop~ies. Three water wells shall be drilled on three adjacent lots within the proposed subdivision. The hydrogeologist shall determine the separation distances between these wells, which shall be between 50 and 300 feet. Larger separation distances may be justified based on information obtained when drilling the first well. Final well layout shall be approved by DSD. The middle well shall be pumped for a period of 2 to 4 hours to obtain data to determine the approximate transmissivity of this well. After allowing the well to recover at least 90% of the measured drawdown, a 24-hour pump test shall be conducted. The 24-hour pump test shall be conducted at a constant discharge rate that will cause 70% or greater drawdown in the well. During this pumping test, the remaining two wells shall be monitored and data shall be collected to determine the aquifer transmissivity, the storage coefficient (if possible), the long-term production capacity of the well and the likely or predicted impact on surrounding wells. Following the 24-hour pump test, each well shall be monitored during the first 24 hours of recovery. Data from the recovery test shall be used to verify the aquifer transmissivity. If either of the other two wells does not draw down during the initial aquifer test, these wells will also be tested with a 24-hour drawdown test following the procedures above. Otherwise, the other two wells shall be pumped for a period of 4 to 8 hours to determine their approximate transmissivity and long-term production capacity. All of the data obtained fi.om these tests shall be submitted to the Development Services Department along with a summary and interpretation done by the hydrogeologist. Municipality of Anchorage Department of Health, and Human Services 825 "L' Street P.O. Box 196650 Anchorage, Alaska 99519-6650 Rick Mystrom http://www.ci.anchorage.ak .us Mayor Permit Number: #SW Date of Issue: Parcel Identification Number: Date Started: 10-23-02 Date Completed: 10-24-02 Is well located at approved permit location? [] Yes [] No Legal Description: McCreadv Meadows ~J,&O t./ $ Property Owner Name & Address: Susan McCready Borehole Data: Depth (ft) Soil Type, Thickness & Water Strata From To stick-up 0 2 organics & silt 2 5 gravelly silt 5 32 silty gravel 32 47 gravel 47 65 silty gravel 65 77 sandy silt 77 84 silty gravel 84 115 silt 115 117 cobbly silty gravel 117 136 sandy silt 136 164 gravelly silt 164 172 silt 172 185 clay 185 213 gravelly silt 213 235 silty water sand 8, gravel 235 241 gravelly silt 241 262 bedrock 262 274 Method of Drilling [] air rotary [] cable tool Casing type: steel Wall Thickness: .2,50. inches Diameter: _.6 inches Depth: 266 feet Liner Type: ~ Diameter: __ inches Depth: ~ feet Casing stickup above ground: 2 feet Static water level (from ground level): 22.1 feet Pumping level: see ottrnl~ test feet after _2 hours pumping 15+ gpm Recovery Rate: 15+ gpm Method of Testing: a~ir lift Well Intake Opening Type: [] Open End [] Open Hole [] Screened Start ~ feet Stopped ~ feet [] Perforations Start 237 feet Stopped 24! feet Grout Type: bentonite Volume: I bg Depth: Start 0__ feet Stopped ? feet Pump: Intake Depth ~ feet Pump size ~ hp Brand Name ~ Well Disinfected Upon Completion? [] Yes [] No Method of Disinfection: chlorino tablets Comments: See pump test Well Driller: Alpine Drilling & Enterprises PO Box 110496 Anchorage Alaska 99511 Attention: The well driller shall provide a well log to the property owner within 30 days of completi,on and the property Municipality of Anchorage Department of Health and Human Services 825 "L" Street PO. Box 196650 Anchorage, Alaska 99519-6650 Rick Mystrom http://www,ci,anchorage.ak.us Mayor Permit Number: #SW, Date of Issue: ~ Parcel Identification Number: Date Started: 10-23-02 Date Completed: 10-24-02 Is well located at approved permit location? [] Yes [] No Legal Description: McCreadv Meadows Blk 0 Lt 4 Property Owner Name & Address: Susan McCready Borehole Data: Depth (ft) Soil Type, Thickness & Water Strata From To stick-up 0 2 organics & silt 2 5 gravelly silt 5 35 silty gravel 35 45 gravel 45 65 silty gravel 65 80 sandy silt 80 86 silty gravel 86 112 silt 112 117 cobbly silty gravel 117 140 sandy silt 140 163 gravelly silt 163 170 silt 170 185 clay 185 215 gravelly silt 215 237 silty water sand & gravel 237 242 gravelly silt 242 263 bedrock 263 274 Method of Drilling [] air rotary [] cable tool Casing type: .s~teel Wall Thickness: ,.250. inches Diameter: 6 inches Depth: 266 feet Liner Type: ~ Diameter: ~ inches Depth: ~ feet Casing stickup above ground: --2 feet Static water level (from ground level): 222 feet Pumping level: see l~urnl~ test feet after _2 hours pumping ~5+ gpm Recovery Rate: 15+ gpm Method of Testing: air Well Intake Opening Type: [] Open End [] Open Hole [] Screened Start ~ feet Stopped ~ feet [] Perforations Start 238 feet Stopped 242 feet Grout Type: bentonite Volume: 1, bg Depth: Start O feet Stopped ? feet Pump: Intake Depth ~ feet Pump size ~ hp Brand Name Well Disinfected Upon Completion? [] Yes [] No Method of Disinfection: chlorine tablets Comments: See pump test Well Driller: Alpine Drilling & Enterprises PO Box 110496 Anchorage Alaska 99511 Well Information - log not available (Complete %his fo=m after amarchingWELTS and other sources for the missing log) This information obtained from: Data supplied by: ~6~/~ /~. ; Well location: .~)~-~-- ~% Well depth: ~ ~-, Static water level: Property description: Type of well: Diameter of well: ~'~ , Cased~ Screened? Location map (sketch): 0CT-~1-2~2 11:5? A~ P. 02 (;PM. M*x fl~wdq~q: ........... LI P.4~2 I")o, 0 '~?o, 0 '?0 2 F~.~ ,~,1..~<.), ] ? ed, 6 i)0 Remarks Z Time /~O 70.¢ Remar~ ~' ;oo 7~0 leto I I~I0 15' ,3o I I:zY 1:3o .6%/ Time R~marks Flew GPM WATERWELL - TEST PUMP REPORT Addr~s: .; , Z~I// j From ,,, To, Time Wafer l~v~q Fk~w GPM Remark~ ?,o 2,,?,s'z 63 o WATERWELL - TEST PUMP REPORT Well Infornmfion: Total Depth: Casing ~ize: R~marks: Pump h~fornmfi~m intake Depth: ~ Static Water Level: Pump On Depth of Casi~: ~ ~creen Diam: primp Size Av. Discharge: Pump Off: Screen From To Screen Slot: Air Line Depth: GPM, Max Drawdwn: Time 'b Time Flow GPM [ Tim~ ! Warn ~;~' '?5 ' ~zoo 0,5-5',e,~'7. ?/ s'.oo _.l;s"5' ;)-F'), ?~.. Ftow GPM Time P.02 NOV-8~-2~82 11:29 AM P.81 GPM I HOV--O~--2082 11:~ AM NOV~07--2002 08 :~! ~ P. 09 Time P~mp Skr~ Air Line Depth: .%x'. Dir~harga: ...... GPM+ Max Drawdw~: .... L~vtl GPM Remarks _ D~pCh of Casing: ~ Screen From ~creen Dtam: Scr~.eu Water~ Flow NOV--O?--2002 08:5! AM P~ 10 Time Water Flow ~el ,,/~ ~,,~_ ~/ ~/,*/ Remarks %67,6 ~.~ ~ ?, 2._ ............ I.~ ~6.?' ? ................... ~o,~o z.z NOV-O?-2002 08:~2 AM I',3° 300 f~5', 3... GPM B 60 ¢~,3 , ~o 'q~O (,00 ~',~ ~60 'r£ ~ ,3o P.11 ~Lo~ ,>~q 5: ~ 7Zo NOV--O?--2002 88 :~.2 AM 3zo 5'7z. ~7 :~7 :30' ... Time Wl~t~ Flow ,Level GPM ~mrb~ WATERWEI,I~ - TEST Pl.;MP ll. lt,~l¥~ NOV--1~?--21~102 08:~0 ~ P. 06 Time Water Flow Remarks Lgv~l GPM ~.o ~9.~+ ...... NOM--O?--200~ 0~30 A~ Time Water Level Flow GPM Remarlcs GPM Remarks P.05 WATERWEI,L - TEST PUMP REPORT Owner, We# t.oe-ation: Wt4[ !~,. ulat~n: Total Depth: __ Pump hfo~flon Prop ~ T~: lt., Address: I~pth of Casing: S~r~n From .... To ..... Screen Dinm: Screen Slot: ... ~mp Size ..... Ay, Discharge: Air L~ne Del~th: . . GPM, Max Drawdwn: .... Time I~low Remarks GPM Water L~vel 'I 1 I P.01 WATERWEI,L - '£E,~f PUMP I~PORT t~etllilfll,3 ~UV--~--2802 88:28 AM ~,~./I WATERW£LL - TE~[ PUM~ REPOI~T ,.15-0 ~:','° ! 21o