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 ....� ...
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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
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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 ..............
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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
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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.
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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
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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:
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PHONE(907) 345-0165; FAX (907) 348-8592
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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
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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
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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.
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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
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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
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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
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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):
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