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HomeMy WebLinkAboutMOUNTAIN AIR ESTATES #1 Tracts B-1C, B1D, B-1E S-5156 DEPARTMENT OF HEALTH AND ENVIRONMENTAL PROTECTION PLATTING OR PLANNING AND ZONING CASE REVIEW CASE NUMBER S-5156 PETITION FOR REZONING SPECIAL EXCEPTION VACATION RESUBDIVISION DATE RECEIVED May 2 r 1979 OF Tracts B-lC, B-iD, B-1E Mountain Air Estates COMMENT TO PLANNING BY May 18, 1979 COMM E N-F.S,: FOR MEETING OF of Cases ENVIRONMENTAL SANITATION: PUBLIC WATEI~,,LN~R~"~'~VAILABLE .-~ . ~.1/ PUBLIC SE ,WE~, NOT-"~VAILABLE TO SERVICE PETITION AREA, ENVIRONMENTAL ENGINEERING: 71-014 (9/76) ,/,---~( ~ MUNICIPALITY OF ANCHORAGE ENVIRONMENTAL HEALTH CASE REVIEW WORK SHEET ~ PLATTING BOARD [] PLANNING & ZONING CASE NUMBER NAME S-5156A Tracts B-lC, B-iD, B-1E Mountain Air Estates #2 DATE RECEIVED January 3, 1980 COMMENT TO PLANNING BY January 21, 1980 FOR MEETING OF CASE OF [] PUBLIC WATER~OT"AVAILABLE TO PETITION AREA [] PUBLIC SEWER ~ AVAILABLE TO PETITION AREA REVIEWER'S CQMMENTS: ,, 71-014 (Rev. 2/78) COi ,,STRUCTION DiVlSIO~ SOILS LOG iON__~,~ ~ ~ ' ........... HOLE NO, / DATE _~..-' ~:7 _ WATER TASLE z-~r u~t:Fl~O FROST DESCR!?TION CLASS CROUP 7 , 12 13 ..... LEGEND TEST HOLE WATER TABLE MATERIAL '~ BASED ON THE.,OZmm:50% j ......... 9~1~ NO. ~%.~ ..... ~ D~T,MErqT OF PUBLIC WORFe CON STRUCTtON DIVISION SOILS LOG HOLE NO. ~ _ WATER TP~9~E z_.~?~ i:~_~r.H UNIFieD FROST DESCRIPTION 0 2' :ATION SKETCH:, I FGEND ALL FROST CLAS31F~CATION BASED ON T)~![ ,02mm-~0% oF ~HE -~200 TEST October 5, 1979 R~t No. 951330 Municipality of Anchorage Pouch 6-650 Anchorage, Alaska 99501 Attention: Larry Pennington Subject: Soil Investigation for Tracts B-lC, B-ID, B-1E~ Motmtai~ Air Estates, Addition 2, Anchorage, Alaska Dear Mr. Pe~ington: At your request of August 8, 1979, we conducted a subsurface soils investi- ' gation for' proposed sanitary sewer systems on .the subject lots. The investigation complied with those procedures required by the ~lunicipality of Anchorage Department of Health and Environmental Protection. This investigation, which was accomplished on October 5, 1979, consisted of three test hol~s drilled to a depth of 20 feet below the existing ground surface. The 'test hole locations are sho~ in attached Drawing A-01. Drilling was accomplished with a rotary drill rig using a continuous flight hollow-stem auger with an outside diameter of six inches. Samples were taken at the depths shown on the soils logs in Drawings A-02 and A-03. The samples will be held in storage at our lab for approximately six months. In addition, all material brought to the surface by the augers was continuously monitored by an experienced engineering geologist. The topography at the drilling site is generally horizontal. At {he time of the investigation the site had original vegetation consisting of Black Spruce and grasses. The top of each test hole was located at original ground surface. The soils encountered in the bore holes are shown in the test hole logs in Drawings A-02 and A-03. These logs display specific conditions encountered at the test locations. However~ subsurface conditions may vary in other parts of the lot without any apparent surficial evidence of the change. G_r~gndwater was encountered in each test hole at the s~r~face. Bedrock was not encountered. At the time t~-e-ho%e was drilled, seasonal frost was not present. 'Permafrost was not encountered. ~'EACT TRACT E~-IE ti, TEST HOLE LOCAI'IO~iS ARE. APPROXIMAFE AHb HAVE iq£11 BEEH LOCAFED BY SURVEY METHODS. Sap, ~c,I, ...... 7o0~ SILT W/SOPiE SAND, SOH~ CLAY (ML-CL) ] A S lL(F W/SOME CLAY (HL-CL) Hoist, Gray 2 A 9,0' 20' T.D. 2 A S IL/' W/ SO,,= CLAY Gray, Very 14oisL (HL-CL) 20' T.D ~ ..... (p) O;.L~**;, ~r~ ,~,ATER i AL t Fibero:s, Brown, Saturated 1 A SiLT W/ SOHE CLAY Gray, Very Hoist 2A SILT W/ SOHE GRAVEL, SOHE SAND (HL) Gray, Moist, Occasional Cobbles ..... 12.0' SAmDY GRAVEL W/ SOME 3 A SILT (GM) ~ Gray. Slightly Moist T.D. 20' F~',~1 F~v. ~ .1 r ................................. MOUNTAIN AIP, ESTATES, ~ ,0~ ~][ ADD~TIOH 2 ~~:~:: - ~- % ,..-' ~ ...................... ,.~ PROJ, NO CLASS~ FICATIONt SOl LS CONSISTENCY AND ~Y~ ~EOLS CLASSIFICATION: Ident£f{cat{on and class{ficat{op~ o[ the sou accordance w{th the Un{lied SoL[ ClassLfica~ion S's~em. Normally, the grakn size distr{but{on determLnes class{f{cat[on of the so{1. 2~ne so,2 £~-; defLned acco=dLng to major and rnLnor constituents with ~he re{nor elements servLng as mod[~iers of the major elements. For cohes{ve soils, the claybeccme5 thepr~clpal other major so{! constituents used as mod{fief; i.e. S~l~y clay, when the c!aypart{cIes are such that the clay dominates so~ properties. ?.lLr~or so{1 constituents may be added to the classification breakdown {n accordance with the particle slze proportion listed below; i.e. sandy silt w/some gravel, trace clay. no c~1l - 0 - 3~ trace - 3 - I2% some - 13 - 30~ SOIL CONSISTENCY - CRITERIA: Soil consistency as delhi.ned below and determined by normal ~ield and laboratory methods applies only to ~on-frozen mater{al. For these mater4mls, the influence of such ~actors as so~ structure: {.e. fissure systems, shr{r~age cracks, slickensides, etc., must be taken into consideration. {n raak{ng any correlation with the consistency values listed below. In permafrost zones, the consistency an~ strength of ~rozen so{!s may vary s{g-n{~{cantly and unexplainably with ice content, thermal reg{rae and soil type. Cohes{onless Cohesive N*~low's/ft) Relative Density Loose 0 - 10 0 to 40% Medium Dense 10- 30 40 ~o 70% 'D~nse -- 30- 60 70 to 90%' Very Dense - 60 90 ~o 100% · *Standard Penetration "N": Blows per fool of a 140-pound harar~ er falling 30 inches on a 2-inch OD spl{tL'~poon except where noted. Very Soft 0 - 0.25 Soft 0.25 - 0.5 Stiff 0.5 -1.0 Firm 1.0 - 2.0 Very F~rm 2.0 -4.0 Hard - 4.0 DRILLING SY~B OLS WO: Wash Out WL: Water Level WCI: Wet Cave In DCI: Dry Cave In WS: While Sampling WD: BCR: ACR: AB: TD: While DrDling Before Casing Removal After Casing Removal After Bor'ing Total Depth NOte: Water levels {ndicate~ on the boring logs are the levels measured in the ~oring at the t~r~es indicated. In pervious unfrozen soils, the {nd{cared elevations are considered to represent actual ground water conditions. In impervious and ~ro'zen so~s, accurate determ~-nat~lms o~ ground water elevations cannot be oEta{ned within a l~mited per{od of observation and other evidence on ground water elevations an~ conditions are requ{_rea. GENERAL NOTES FP"OJ. i, lO GENERAL STANDARD SYM ';:JO L5 C~BLES & BOULDERS CONGLOMERATE SANOSTONE MUDSTONE LIMESTONE IG.';EOU2 ROCK f'-I FT~*,"JORPHIC ROCK ICE -SILT C.~GAN1C SILT SANDY SILT SILT GRADING TO SANDY SILT SANDY GRAVEL, SCATTERED CO~3LE S [ROCK FRAGMENTS) INTERLATEREO SA/iD ~ SANDY GRAVEL SILTy CLAY ~/'TR. SAND SAMPLER TYPE SYM5OL$ Si' ..... 1.4" SPLIT SPOON Ss ..... t,4" SPLIT SPOON SI ..... 2.5" SPLIT SPOON Sh ..... 2_5" SPLIT SPOON Sx ..... 2.0" SPLIT SPOON Sz ..... 1.4" SPLIT SPOON · Sp ..... 2.5" SPLIT SPOON, Hs ..... 1.4" SPLIT SPOON WITH 47-7~ HAMMER WITH 140~ HAMMER WITH 140# HAMMER Wt~ 3~ HAMMER WITH 140~ HAMMER WITH 340~ HAMMER ~SHED DRIVEN WITH AIR HA~MER · Ts .... SHELBY TUBE · Tm .... MODIFIED SHELBY TUBE Pb .... PITCHER BARREL Cs .... CORE tBARREL WITH SINGLE lUBE Cd .... CORE BARREL WITH DOUBLE TUBE Bs .... BULK SAMPLE A ..... AUGER SAMPLE G ...... GRAB SAMPLE HI ..... 2.5" SPLIT SPOON DRIVEN WITH AIR HAMMER NOTE; SAMPLER TYPES ARE EITHER NOTED ABOVE THE BORING LOG OFt ADJACENT TO IT AT .THE RESPE~CTIVE SAMPLE DEPTH. L.D.S. G.L.B. FEB. 1972 NONE --' TYPICAL BORING. LOg 80~?ING NU/AEE/?-..,~T' H. 30- 15 El er. 274.. 6 ~ ELE.'Vx~IZO/V IN DATE ~PILLED~iO.21.70 All Scrap;es Ss~'¢4MPLE~ TYPE d "~ Consi& Visible Ice ICE+ML ICE -SILT E~timat. 65% Visibt~lce SANDY SILT APPrOXImATE ~F~ATA Little toNoV~sible Ice 1~30' Vx ., IC~ D~SC~IPH~ ~ C~IFICAHON ~ 72,5~1% ,85.9~c¢, 28~GP (CO~PS OF ~ %_ _ 'V/ATEP CONTENT SAND~ G~AVE~ Cd 95 SCHIST ~ GEHE~ALIZ~ SOIL O~ LOC~TIO?I 30~DR/LL DEPTH GRAD,~TIONA~ CHANG~ -- FHOZEtl ~ W,O-WHILE DHILLI/VG, AB-AFTEP. BORING EXPLANATION OF SELECTED SYMBOLS /F~a N/A IG~ N/A ' J Lo',','G. No ICE Percen~a[2? o~ v,.'sLb!e [ce },~s been grouped for [:he puz-pose of des[gnat[ng the amount o~ soil ice content. These ~roups }uu'v'e a~o[trari!), been ~;e[ out ~s folio\va: >35% No Visible. !ce L{ttle Vis.la Ice Occasional Visible Ice Some Visible Ice Considerable Visible Ice The ice description system is based on that presented by K. A. Linell~ and C. W. l<aplar (t966). In this system, which is an extension of the Unified Soil ClassiJ~ication System: the amou~nt and physical c,%mracke-~stics of the soll ~ce are accounted for. The follow{nE t~ble is a brie~ summa-~y of the salient po{nts of their classification syske~ as modL~ied to meet the needs of this study. ICE DESCRIPTIONS GROUP SUBGROUP ICE VISIBILITY 8 CONTENT I__ SYMBOL -DESCRIPTION SYMBOL Poorly bonded Nf or fri~ble Nb ?" bonded I E-X cess I "'~ lice {Nbe Individual ice crystals or V~ inclusions lc. coatingn Vc on pcrticl~s V Ice visible, <50% ~'~dom or irregularl3 V oriented )ce r formations Strztifi~ or distin~ly oriented Vs ice formations V~S~'8~I IPl >500/0 Ice with soil ICE + Ice inclusions soll type ICE Individual layer >6" thick * tc~ without ICE soil i~clusions ~ In some cases where the soil is ice poor e thin ice layer' may be called out by special notation on the log, i.e. 2" ice lens at 7.' OarM 3~ I - 72 CONSULTANTS, INC. EXPLANATION OF 1CE SYMBOLS Plat Status: Final GkL&!l:h /'a,C ,,9,'&G,. ^REA ]:C OUt,',. ].04 {'?e .':; t ~ Amhorage, k]aM:a 9950~ c.;~: ..... $~ 2248 D!P,:e: 2/ld/71 BOROIJC~H: Engineer Sand l.ake l"ire Department School District Street Na;~ms Tax Assessor Ala~ka Depr~rt~mnt of Highways A]aska Railroad Anchorage N=tural go.s Corp, Cm~D:'al Alaska UtilJ'~ies Chuttach Electric Association Re: Subdivision / Description of Property: See attached plat. CITY OF ANCI-IORAGE: Fire Mtmicipa ! Li. gh t Property PublJ c 1gorks To lephoa~:, Utility Traffic Water Uti lity GAB 'r~ l~,c o~mmaicat i. ohs Matanuska }~ leci',ric Ma. tanuska ').'~ ] epho:m Assistant Suparlntendcut OWII 01': Wesley O. Michael a Estalee Michael G~nt le~,en: Peti'i'ion has been ..... ' -, ~..ce~.vud by the Greater A'uchorage Area l~,orot;gh Pitmn~ng and Zoniflg Commission for thc proposed Subdivision Of ~ubject proparty. Atta'~>'.ed is a copy of the proposed plat. i~'ill you please submit your ~n writing, specif},in.g any easements or other requirements that yoaz depmc't- me~'ttg or agency may need. If w=.do.nyt hear from you by .... ~5~71 , we wi]l asgume that you do nor W~Si] to submit any comaien'{~ If you have no furS:her u::e for the attached print, please return it with yOll~ CON~XOIILS, tile Planning DEPART, JT OF HEALTH AND ENVIRONMENTAL t,..JTECTION PLATTING OR PLANNING AND ZONING CASE REVIEW CASE NUMBER ~'- ~/~}~d-~/ PETITION FOR Rezoning Special Exception Date Received Comment to Planning by for meeting of 4040 'B" STREET, ANCHORAGE, -ALASKA 99503 PHONE: 907-279-2581 Decen~er 16, 1975 W.O. tt8758 Mr. Sewell Faulkner c/o Jack White Company 909 West Ninth Avenue Anchorage, AK 99501 Subject: Subsurface Investigation - Mountain Air Estates No. 3 Dear Mr. Faulkner: Transmitted herein, in accordance with Mr. Houk"s instructions, 'are the results of %he subsurface investigation performed between Nove~oer 28 and December 4, 1975. The primary scope of this project is investigation for suitability of on-site sewerage systems. As requested, a limited_ discussion of the peat deposit on the site is also included. Following the text of the report are: vicinity Map Test Hole Location Sketch Estimated Peat Depths Test Hole Logs Standard Explanatory Inform'. Figure 1 Figure 2 Figure 3 Table A Appendix A The exploration was conducted' using a "Mobile drill" model B-50 drill riq mounted on a Flextrack Nodwell tracked vehicle. The drill rig~was equipped with a continuous flight solid stem auger. This equipment is owned and operated by DenalJ Drilling Inc. Drilling was supervised and the test holes were logged by Mr. Wallace Oliver, staff technician with Alaska Testlab. The water depth was measured and the percolation tests were performed by Mark Hanson, engineer with Alaska Testlab. Mr~ Sew~].! Faulkner -2- December 16, 1975 The ~ight test holes were initially located on an aerial photograph by Mr. Jon Houk, Planner with DOWL Engineers. The test holes were then located in the field as interpretted from the aerial, photograph. After drillin% a stadia traverse was used to determine the actual test hole locations. S~vera] ]~(-)]es -.- partJcu]or]y hole tt6 .... were found to be at a somewhat different location than originally pi?oposed by Mr. Houk. The approximate locations of the test holes as drilled are shown on Figure 2. The logs of these holes are included as Table A of 'this report. For aid in interpretting the logs, standard explanatory information is contained in the back of the report (Appendix A). When drilling was completed, 3/4" slotted P.V.C. pipe was inserted in each test hole to determine the static free water level. After five to six days the water level, if any, in each hole was measured. Percolation tests were run where the water level was deep enough to allow, by regulation, t~e use of septic tanks with soil absorption systems. For the percolation tests, the test holes were filled with water and left overnight to saturate. On returning 'the next day, the hole was refJ. lled with water and the drop in the water level carefully ~lon~itored over the next 60 minutes. The above procedure is not a standardized percolation test, however, we understand that the Anchorage Department of Environmental Quality prefers tests performed in this manner to evaluate a site for proposed septic systems. Using the above test, percolation rates were as follows: Test ttole Test Hole ~2 Test Hole 3.5 minutes/inch 15 minutes/inch 3 minutes/inqh Due to the high water level, no percolation tests were attempted on the other five test holes. The Anchorage Department of Environmental Quality does not allow any septic tank absorption system to ]De placed within four feet of a water table. This precludes the use of septic tanks where the depth to water level, is less than 6 to 8 feet. Over much of this site, the water table appears to be in the peat (4 of the 5 test holes with high water levels are in the peat deposit)[ l[f the free water in the poa~: can be drained, larger portions of the si. to can then be ew~luated for suitability of sop-tic systems. The water level do]'>ths given should be used with caution as the water table tends to fluctuate with percipitation and with seasonal changes. Mr. Sewell Faulkner -3- December 16, 1975 Peat was encountered as the top layer in four of the eight test holes. As these holes were originally intended as percolation holes, a solid stem auger was used to drill then]. With a solid stem auger, soil from one layer often ~ ~ ~ .. . , , ....... ~ ........ k..~.~, ,e~., of peat sampling spoon were used. The observed thickness of the peat layer ranged from 0 feet in the high ground to '~5 feet in test hole [~3. The estimated extent of the peat deposit is shown in Figure 3. Because only four holes were c/tilled in the peat deposit, interpretation of an aerial photograph was used to estimate its extent. The contours shown in Figure 3 should be regarded as extremely rough and are intended to be used only for preliminary planning. If more accurate determination of the peat depths, is desired, additional test holes should be drilled. The discussion is limited to the percolation data and depth of organic overburden. Should you desire analysis of the data with regard to earthwork and foundation, please advise. We trust this report meets your present needs. If we can be of further to the project, please do not hesitate to contact us. Yours very truly, ALASKA TE S TLAB R. Mark Hansen ApprOved: / Attachments I ,© TesZ Hole No. 1 Depth in ~eet From To 0 2 O Bottom of Test Hole: Frost Line: Free Water Level: TABLE A SOIL DESCRIPTION 1 1/18175 Tech. W.O. WO~t8758 graded, occasional cobbles, subrounded particles to 1", damp 20 ft. None observed None observed SA. Type NO. De~h ~am~le I 5 '2 10 3 15 G NOTE: Hole caved @ 16 ft. Remarks: 1) Type of Sample, G=Grab, SP=Standard Penetration Test Hole No. 2 Depth in Feet From To SOIL DESCRIPTION 1~/28/75 Tech: W. 0. 0 8 8 20 F-l, Si]_t¥_ Sandy_ gj29v_~]__~, GM, brown, poorly graded, occasienal cobb].es, su])rouned partJ_cles to 2", damp F-4, San(~[. SJ.lt, ML, gray, occasional co]~bles · damp ....... , Bottom of Test IIole: Frost Line: Free Wa'Let Level: see · NO. Depth 1 5 2 10 3 15 4 20 . Remarks: 20 ft. None observed None observed wh:i_le drilling 9 ft. after 5 days Type G G N 1],: Test ttole No. 3 'Depth in Feet From To 0 15 15 20 Bottom of Test Hole: Frost Line: Free Water level: SA. NO. I 15 TABLE A SOIL DESCRIPTION 11/28/75 Tech: W. O. wott8758 NFS, Graveling.! .Sand., SP, gray saturated 20 ft. 0.0-1.5 ft 2 ft. after 5 days Type ~f ~Sample Test Hole No. 4 Depth in Feet From To 0 9 9 30 Bottom of Test Hole: Frost Line: Free Water Level: SA. NO. Depth 1 15- SOIL DESCRIPTION 11/28/75 Tech: F-4, _.Peat, Pt, brown, damp to wet F-l, Silty Gravel, GM, gray, poorly graded, saturated, sul~r'ounded particles to 1" 20 ft. 0.0-1.0 ft. 16 ft. while drilling, 2 ft. after 5 days Type of G NOTE: Remarks: Free water ].eve]. determined iu 3/4" observation we]_.]. 1) Type of Sample, G=Gra'b, SP~Standard Penetration Test Hole No. 5 Depth in Feet From To 0 8 8 15 Bottom of Test tIole: Frost Line: Free Water Level: SA. NO. Depth I 15 TABLE A SOIL DESCRIPTION 11/28/75 Tech~ W.O. wo~1~8758 F-4, Grave]iN. ~_ Silt, ML, gray, saturated 15 f~. 0.0-2.0 ft. 10 ft. while drilling, 2 ft. after 5 days Type of G Test Hole No. 6 Depict ~n Feet From To 0 20 Bottom of Test Hole: Frost Line; Free Water Level: SA. NO. Dephh 11/29/75 ~Tech: W.O. SOIL DESCRIPTION F-2, Silty____ Gravel]y~ _ Sand, SM, brown, poorly graded, occasional cobbles, subrounded particles damp, wet @ 15 ft. 20 ft. None observed None observed Type of Sample_q_ I 5 G 2 10. G 3 15 G 4 20 G Remarks: 1) Type of SampIe, G=Grab, SP=Standard Penetration Test IIo]_e No. 7 Dep'~h. in Feet From ' To .TABLE A SOIL DESCRIPTION ,1/29/75 Tech: W. 0. W0~18758 0 3 F-4, Peat, Pt, brown, damp 3 20 F-2, ~_~:.~l_tZ G?_:_3~_v_e~]_:~..Z ~n_d_' SM, brown, poorly qr~c?ed, occasio~w~] cobb)es, damp, wet ~ 17 ~ -- - , z t ,, Bottom of Test Hole: Frost Line: Free Water Level: 20 ft. 0.0-1.0 ft. None observed during drilling, 6.5 ft. after 5 days SA. .NO ._ D__e_.pth Type of Sample 1 5 G 2 10 G · .3 15 G 4 20 G NOTE: Free Water Level observed in 3/4" observation well] Test Hole No. 8 Depth in Feet From To 0 15 Bottom of Test Hole: Frost Li~e: Free Water Level: SA. NO. Depth 1 5 2 10 3 15 NOTE: 11/29/75 Tech: W.O. SOIL DESCRIPTION F-2, Silty Gravelly_ Sand, SM, brown, poorly graded, occasional cobbles, wet 15 ft. None observed 6 ft. Type of .~mp 1 e Free Wa'her Level observed in 3/4" observation well[ Remarks: 1) Type of Sample, G=Grab, S]?=Standard Pone[ration APPENDIX A Test ttole Log --- Description Guido The soil descriptions s]lown on the logs arc the best estilnate of the soil's characteristics at the time of field examination and as such (lo not achieve the precision of a laboratory tcstu)g procedure. If thc log includes soil~ samples, those samples receive an i:~dcpcndcnt textural c]assification in thc ]abolatoly to verify the field examination. The logs often include the fo]lowing items: pe~b Interval - usually shown to 0,1 foo w ~n that zone no ~ig/dfi~nt-~b--~-nge in sial type was observed tbr'ougb drill act o , direct observation or sampling. Frost Classification - NFS, Fl, F2, F3, F4, see "Soil Classification Chart~-- ........ Texture of Soil - An engineering classification of the soils by particle sizc-~.]JcT--pr~'portion see "Soil Classification Chart", note the proportions are apploxhnate and modifications to the soil group due to stratification, inclusions and changes in properties are included. Moi~D~rg_Cf~L~?n[ ~ rhis is a qualitative measure: ~,no ot little apparent stol, cc moisture, damp, moisture fmms portion of color, less than plastic Iimit, wet, no free w:de% often soft, if cohesive soil, ~A[?a~, free water may be squeezed out, if a free chaining soil; sand. (The Ino~stu~c coutcnt is fm tbcr del incd by Ic(e/ence to Pi, LW, NP, M%or dilatency.) mixtures with or witlmut a fine fraction, dcxivcd from chilling act[oll and/m s*mple data; usualIy described as: rely loose, h,ose, medium Stiffness. rcfms to mnre-o~-lcss cohesive soils and finet!~incd silt sof t}-T~Tc clay sift glotlps, l)c'li~cd flora cb ill action aud/or sample datL ~lC:')r soft, soft, stiff, very stiff aud ha~d arc commonly used toxins. Pa~jicl~siz~ The Lugcst particle ~ecovtucd by the split spoon is 1-3/8", SSclby tribe 3", atl[iP1 ~]ights (llllllUtC.illall) 2", AU~:Cl tlights (13-50 holk)w stem) 6"-8'. La~gcr pa~tkles arc described iadirectl> by action of the drilling alld arc ~etc~rcd t(* as c~ [/les Y' to S", or bouldms 8"4. Therefo]~ wi/ell rt ,ewinF the gradation shcels, if;my, the description on thu hole log must bc considc]cd Im an indication of larger pzu tit:les, Unified Soil Classificatitm This is a two I(ttcr code. See Unified FAA soil cIassificatiuns may bc shown as well as thc unified. At~}'_~_~.[t}_}:i~it~-- uscful for fine grained and other plastk: soils. t~]; natural moisture content bchcved to be less than pk~stjc hmit PI-lq natural moisture content believed to bc between pklatic and liqukl L~w-t; lUlttn'al moisture content bclicved to b( gloater than liquid limit _N_i.~.; non-plasth:, useful ils a mod fyi It, description o£ stone silty 12!J.&t½i. pyl' -.- is the ability of w.,tc, ~o milpatc lo thc s 'act of a S;llUl;llt'd OI IIt'.llJy Satllldlcd soil saJflplc when vilnatcd ur juhcd used as an aid to dctcrminc if ,i hue gr.,im, d ~oil i~ a :,lightly or romp ,IstJc silt o/a voh:.mk, ash, .Rgck flour- finclyg~otmdsoiltl'~atisnotplasticbutotherwiscal)pears ~ilniliiSvi. bwa clayey silt. Organic Content usuatIy described as Peat, F'F, sometimes JnckMcs ~-c~7c~i~Titj~lt7~ such as wood, coal, etc, as a modifier to an inorganic soil. Quantity described as; Uacc, or an cstilnatc of volume, or, ill case of all organic, -. ;is Peat. This may Jncludc tundra, muskeg and bog nlaterial, Muck - a'modifiet used to describe very soft, se i-o ganic deposits ~s-u-aJly occuring below a peat deposit. Amorp~[t_l~s l)eat ~ organic particles nearly or fully disintegrated. I_:ibro~u~s F'~ea__t - mganic particle's more-or-less intact. B~[?)2~f_T~st~?)e includes last sample interval. ?~9~t l,}n2 - seasonal flost depth'asdesc:/bcd bydd]lmgacti(mand/or samples at thc time of d~illmg. Frozcll (;Iotllld other than frost line, described by samples, usually i ~c ud'W~te~}-~it~don of icc contenl, often will inctudc modified Unilied Classification for fiozcn'so}ls - tiffs is a special case related to perlnafrosL studies. The rice water level noud dutingttr i~g. Thisis ]',Jo_~),~/~'_' . Thc nulnbc~ of bk)ws of a ] 40 weight ftc( f, g 30" to b5 dcfiuition, thc staml,ud pcuetration. :dfi£h - natulal m,'dstu~c ccmtcm of thc soil samph~, tlsuaH), Type of Sam ~[', ]cftqs to 2" split spmm dfiwn into d~c soil by 140 pound wcigbt,adistmbc{ s nplc ' ~, thin wall tube. "Shelby" used to obtain undisturbed salnp]cs offineg, a · soil ~, "grah' disturbcd s;unplc flora ilLl[}er flights m' wall of t't nth (~, CUt S;llllp]t', tmdistuJbcd Sillllplt, ~1o111 wall of trcllCb. l)r, gt 'ntth ._~ .... - a useful indi~atm' ofit soil's clayey flaclit)n, L=l.°w, M'-Mcdium, (~[j}t2p .- Thc samples arc placed into appaltql/Jy simiLJr g~oups Oil toIol and ICXlllle ,itld ;l['C illbitlaliJy ;isMjlllcd a tP'otlp disttubcd Icsts im:ludinl~ Atto ~'1}, I,imits, I',tMu ';if, c, IIIt)JMtHP dcuni~y reflect the ilt, He~,lJ di~;l~ t~J~ctt I~ "istk,; ~ f tJlt, s,dis assigm'd g~oup. This is illl impml.mt pll,U;L~ O{ tht' s-il ;lll,lJvr;i~; standauli/c thc v,ui,ms qu,dit,ttive dt'lcrmhhlli~m~; alU{ tu :('tJu¢c tJ)t. SOIL CLASSIFICATION CHART 30°/; GRAVEL oNo CLAY ,,,,/ .-k SAND % CLAYEY CLAYEY OR I~TY SILTY SI LTY SAND GI~AVEI_I_Y SAND ,let GRAVELLY SAND 0 10 CLAYEY X CI_AYEY ~- \f SANDY SILTY C~R/~,VEL /q.xGRAVEL \X\ O /5 SANDY GRAVI~.I_ G F~AVl]I_ 50 GO 70 80 90 1 O0 GRAVEl- (+,74 SCREEN) % BY WEIGHT NONFROST SUSCEPTIDI_E 5OI1.5 ARI INORGANIC SOILS CONTAINING LESS TIIAN 3% FINER GROLIPS OF Id,~OS'I-SUSCLI:'TII3LI: bOfl_L;: FI GRAVEI_I._Y SOIl.S CON'I AINING I]ETWLI:N 3 AND 20% FINFR TI.lAN 0.02 mm, F2 SANI)Y SOil ti CON'I AIMING UI] WttEN 3 ANI) lb% lINER I lIAN 0,O2 into. F3 a, GRAV[I.I Y SOll_'.;CONI/\ININ(; MORI fll/\N 20%1-1N1~1( 'I'tlAN I).02 mm. AND SANt)Y SOILS (EXCEIq I INI:SII.'fY, SANI)15) CONqAININ(; MOlll! TIIt\N ]5% I:INEll TIIAN 0.02 1), C.I_AYS\VIIIII'L/\STICITY INI)EXI SOl M()RI] TIIAN 12. lLXCEI~I V/\llVl~l.) CLAYS, a. AI_I..511.T5 IN{:I. tJI)IN('iStXNI)Y I), F:INI- $1I_IY SANI)S Et)NI/\ININ(i MURI III/\N lb% I'INI:I( TIIAN 0.02 ¢, LEAIxl (:1 t\YbWI'III I't/\S'IICII-Y INI)I )(1_'.;O! I.l'.~5 TII/\N 12, d. V/\t/VIiI) CI_/\YS, ~ r-' --.I ~Om mc~ zO I" m THIEL & ASSOCIATES ENGINEERS & SURVEYORS Elg WEST EIGHTH AVENUE ANCHORAGE, ALASKA 99501 (907) Mr. Rolf Strickland Dept. of Environmental Quality GAAB 3330 "C" Street Anchorage, Alaska Re: MOUNTAIN AIR ESTATES "ON SITE'~ WATER & SEWER FACILITIES Dear Rolf: This site was inspected on November 8, 1972 and found to be quite beautiful fom residential development. During the inspection it was discovered by the owner that the test holes had filled with water although each was dry upon the completion of the backhoe digging operation. A further look at the surrounding ground to the north showed that the draining of a high water table located in Storck Subdivision ( A Swamp) was occuring. The development of the roads within this subdivision will provide surface drainage which is anticipated to lower the ground water as noted on my trip. At the present time the ground water is high enough to preclude seepage pits in the areas represented by the test holes, hence, I show a general layout for all the lots with drainage field. At present I feel that the ground water will subside to allow seepage pits in specific areas therefore a layout for seepage pits is included for your information also. If there are any questions please contact me at 279-6508. Thank you. Sincerely, Ronald L. Thiel, P.E. ~,.,,-: .,..f,'~*JKan¢LN AFIUHURAUE AREA BOROUGH,---,, HEALT '-DEPARTMEflT 327 EAGLE STREF, T ANCHORAGEj ~ nLA.,KA 99B01 [,~gaL Descrlpti°n~ Lo~ BlockD~/S~d vJ~on ~n~s ro~ ~epo~ta al ~o~la go~__ . '. ·-Percolati~ 'rest -~ '" Depth ~ 1 ' ' ' ....... : ..... Feet Soil Charac'toristics '" ~ .......... =-~ .... -~:,~- ............... i,__,..f_:- ..... Location Sketch '' . ~ ~.'~ .: :.. ..-~ .. ,, ... ~: ~ ~'.u~. . .5.~. ., ..~ ~~ .... . ...... Readlng Date Gross Time Net Time Depth To H20' Net Drop' Proposed ~, ~"~ ...... ~ ..... ' ~nota. L~t~on: Seapage pi-~ DPa'in Field Dep%h Of In.l~qt . . TT= ~, -- , .... ,, ,, COHHE~ITS:~~':" -. ?~t,1. Fo ~ot.tom.Of Pit Or T~enc~-- Dat~ C.artlff~,d'Bv.~ ~t 9 z ~ ~:.--~ :,, ',. ~ · .' : ' : ~.'"::: ~-oS..p'~.o '; · · ~: . ~ . ~ · /'_.r.~/~ "., :. · .... , . .,...'.' , · Depth ' ..... HEALTll -DEPART~ENr 327 EAGLE STREET ANCHORAGE~ ALASKA 99501 This Soil Characteristics Location Sketch''' Yes, At What D~pth "~:) /-7,~ '9 Reading Date Gross Time Met Time ' ' ' ' ...... Proposed Instatlatxon: Seepage Pit Drain Field Depfh Of '_ ' l}ap~ To Bo'~ O'f Pi'~ Or Trench . minl~t ~ . ............ , .~w~ ~ ~~':: , . .: .:. . .. . . . c~i~.t~d ?:--L .~_ .-- / /~ .- :. ,,,.....,..,,... ,.., -,.... :., , : . ~ r, ~7 /~ ~ : '~ · ' ''-.',; ,~ - ' Da',.,a~ ~ ..... ' ............ ' ......... ' ....... ' ' "": ..... HEALTIt-DEPA?THENT CAS~ 327 EAGLg STREgT ANCHORAGE~ ALASKA 99501 Thio }o~ R~ports a~ So~ls Log ' ·-~'er fan 'ro~t '" - '' - ..... . . cola t Depth ' ~ ' ' . ~ .... Feet Soil Characteristics Was Ground Water ~ncountered? _.~. _'C ' tf Yes~ At What Dspth .... ~.~.. g__~ t/ Location Sketch' ' arco±atlon l<aCe I"/ ..... }ii'h~tb ProT'osed Installed-ion: Seepage Pit Drain Field Dop%h Of Inlet ...... . _ ~ ' Depth To Bottom Of Pit Or · ~,/ /~'~.~'. :' , '~ · ' ' ' ........... ~,~ ~'(( ' ,.. ~.~::' . ,..,~ .? . ~. ,',...;",~ ~'~ ~ f .... ~ r.~ ......... 22. ."' ' - -'t, . , .%-':. ' HEALTII'-DEPA~TMENT 327 EAGLE STREET ANCHORAGE, ALASKA 99501 Soil Cha~acteristlcs Was O~ound Watem Encountered?__ If Yes~ At What Depth Date Gross Time Reading Net Time Location Sketch''' Depth To H'20 Net Drop' Proposed Installa~on: Seepage Pit Drain Field Depth Of Inlet GREATER ANCHORAGE AREA BOROUGH 3500 Tudor Road Anchorage, Alaska 99507 2624 PLAT STATUS: BOROUGH: Platting Engineer Public Works Department Fire Department Street Names Tax Appraisers School District OTHER: Alaska Department of Highways Alaska Railroad Anchorage Natural Gas Corp. Central Alaska Utilities Chugach Electric Association CITY DATE: 2/9/72 OF ANCHORAGE: Fire Marshal Municipal Light & Power Department Property Management Officer Public Wor~s Department Telephone Utility Traffic Engineer Water Utility GAB Telecommunications, Inc. Matanuska Electric Association Matanuska Telephone Association Assistant Superintendent of Mails Alaska Department of Fish & Game DESCRIPTION OF PROPERTY: Vac. of portion of Mountain Air Drive Sub. Mountain Air Estates (to be Addition #2) OWNER: W. O. Mickael Gentlemen: A petition has been received by the Greater Anchorage Area Borough Planning Department for the proposed Sub & Vac~ of subject property for the 3/8/72 Planning Commission Meeting. Attached is a copy of the proposed plat. Will you please submit your comments in writing, specifying any easements or other requirements that your department or agency may need. If we do not hear from you by 2/25/72 , we will assume that you do not wish to submit any comments. If you have no further use for the attached print, please return it with your comments. Planning Department Enclosure MUNICIPALITY OF ANCHORAGE DEPT. OF HEALTH & ENVIRONMENTAL PROTECTION OCT t ! 1979 RECEIVED ~RACT B-lC TRACT B-] D TRACT B-iE TH 3 TEST HOLE LO~.ATIO,,~S ARE APPROXIMATE AND HAVE NOT BEEN LOCATED BY SURVEY METHODS. I DW N.. CKD. __ DATE' 10-6-79 SCALE. I '----'200 :~N $ U LTA N TS, INC. TEST HOLE LOCATION DIAGRAM MOUNTAIN AIR ESTATES ADDITION ? TEST HOLE SurFace WateF Table ORGANIC MATERIAL (Pt) Saturated, FibeFous, Brown W.D 7.0' SILT W/SOME SAND, SOME CLAY (ML-CL) Gray, Moist ' 9.0' ! A TEST HOLE 2 0.0I Surface Water Table ORGANIC MATERIAL (Pt) Saturated, Fiberous, Brown ORGANIC SILT W/ 3.5' 1 A SOME CLAY Wet, Gray '---5.0' ORGANIC MATERIAL (Pt) Wet, Brown, Fiberous 8.5' 2A 2 A S IL:F W/SOME CLAY (ML-CL) Moist, Gray SILT W/ SOME CLAY (HL-CL) Gray, Very Moist 20' T.D. 20' T.D. MUNICIPALITY OF ANCHORAGE DEPT. OF HEALTH & ENVIRONMENTAL PROTECTION OCT 1 1 1979 RECEIVED TEST HOLE LOGS MOUNTAIN AIR ESTATES ADDITION 2 TEST-HOLE 3 Surface ~,later ,~'bl~' ORGANIC MATERIAL (Pt) Fiberous, Brown, Saturated SILT W/ SOME CLAY Gray, Very Moist 7o5~ 2 A SILT W/ SOME GRAVEL, SOME SAND (ML) Gray, Moist, Occasional Cobb]es 12.0' SANDY GRAVEL W/ SOHE 3 A SILT (GH) Gray, Slightly Moist T.D. 20' MUNICIPALITY OF ANCHORAGE DEPT. OF HEALTH & ENVIRONMENTAL PROTECTION OCT 1. 1_ 1979 RECEIVED ~L M BONSIJLTANTS, INC,]I TEST HOLE LOGS MOUNTAIN AIR ESTATES ADDITION 2 o 95i SOILS CLASSIFICATION, CONSISTENCY AND SYt%IBOLS CLASSIFICATION: Identification and classification of the soil is accomplished in accordance with the Unified Soil Classification System. Normally, the grain size distribution determines classification of the soil. q~e soil is defined according to major and minor constituents with the minor elements serving as modifiers of the major elements. For cohesive soils, the clay becomes the principal noun with the other major soil constituents used as modifier; i.e. silty clay, when the clay particles are such that the clay dominates soil properties. ]%{inor soll constituents may be added to the classification breakdown in accordance with the particle size proportion listed below; i.e. sandy slit w/some gravel, trace clay. no cad.1 - 0 - 3% trace - 3 - 12% some - 13 - 30~0 SOIL CONSISTENCY - CRITERIA: Soil consistency as defined below and determined by normal field and laboratory methods applies only to non-frozen mater{al. For thesD materials, the influence of such factors as soil structure, i.e. fissure systems, shrlnkage cracks, slickensides, etc., must be taken into consideration in making any correlation with the consistency values listed below. In permafrost zones, the consistency and strength of frozen soils may vary significantly and unexplainably with ice content, thermal regime and soll type. Cohesionless N*Colow's/f t) Relative Density Loose 0 - 10 0 to 40% /VIedium Dense 10- 30 40 to 70% Defuse 3'0- 60 70 to 90% Very Dense - 60 90 to 100% *Standard Penetration "N": Blows per foot of a i40-pound hammer falling 30 inches on a 2~'inch OD split-spoon except where noted. Cohe sire T- (tsf) Very Sol t Soft Stiff t: Firm Very Firm Hard 0 - 0.25 0.25 - 0.5 0.5 -1.0 1.0 - 2.0 2.0 - 4.0 -4.0 DRILLING SYMBOI,S WO: Wash Out WD: WL: Water Level BCR: WCI: Wet Cave In ACR: DCI: Dry Cave' In AB: WS: While Sampling TD: While Drilling Before Casing Removal After Casing Removal After Boring Total Depth --Note: Water levels indicated on the boring logs are the levels measured in the boring at the times indicated. In pervious unfrozen soils, the indicated elevations are considered to represent actual ground water conditions. In impervious and frozen soils, accurate determinations of ground water elevations cannot be obtained within a limited period of observation and other evidence on ground water elevations and conditions are required. GENERAL NOTES STANDAR SYMBOLS COBBLES ~ BOULDERS CONGLOMERATE SANDSTONE MUDSTONE LIMESTONE IGNEOUS ROCK METAMORPHIC ROCK ICE, MASSIVE ICE - SILT ORGANIC SILT SANDY SILT SILT GRADING TO SANDY SI LT SANDY GRAVEL, SCATTER,~D COBBLES (ROCK FRAGMENTS) INTERLAYERED SAND ~ SANDY GRAVEL SILTY CLAY w/TR. SAND St ..... 1.4" SPLIT SPOON Ss ..... 1.4" SPLIT SPOON SI ..... 2.§" SPLIT SPOON Sh ..... 2.5" SPLIT SPOON Sx ..... 2.0" SPLIT SPOON Sz ..... 1.4" SPLIT SPOON Sp ..... 2.5" SPLIT SPOON, SAMPLER TYPE SYMBOLS WITH 47~ HAMMER WITH 140~ HAMMER WITH 140/~ HAMMER WITH 340# HAMMER WITH 140~ HAMMER WITH 340~ HAMMER PUSHED T-~ .... SHELBY TUBE Tm .... MODIFIED SHELBY TUBE Pb .... PITCHER BARREL Cs .... CORE BARREL WITH SINGLE TUBE Cd .... CORE BARREL WITH DOUBLE TUBE Bs .... BULK SAMPLE . A ..... AUGER SAMPLE Hs ..... 1.4" SPLIT SPOON DRIVEN WITH AIR HAMMER G ..... GRAB SAMPLE HI ..... 2.5" SPLIT SPOON DRIVEN WITH AIR HAMMER NOTE: SAMPLER TYPES ARE, EITHER NOTED ABOVE THE BORING LOG OR ADJACENT TO IT AT THE RES,:~CTIVE SAMPLE DEPTH. SAMPLER TYPE~.Ss WATER TABL~ GRADATIONAL -- TYPICAL BORING LOG BORING NUMBE~'-_~.ii H. 30-15 Elev. 274.6 ..+---ELEVATION I~ FEET DATE D/?ILLED~iO_ 21- 70 All Somples Ss~SAMPLE~ TYP~ O' ORGANIC MATERIAL I' Consid. Visible ~ce 0'-7' ICE+ML ICE -SILT Estimote 65% Visible Ice SANDY SILT ' ' I~' LJHle ~ NoVisible I~e ~0' V~ ~-tC~ DESCRIPTION ~ C~IFICARO~ ~ ~ ~ ~ ' TEMPERATUR~ °F ~ ~ ~ --DRY D~SITY ' ~ ~--V/ATE~ ~ BLO~S/FOOT . SAMPLE NUMBE~ SANDY GRAVEL 2G' Cd 95 SCHIST ~ ~ LOCATION 30' ~--DRILL DEPTH FROZEN WHILE DRILLING, AB-AFTER BORING ,, G.L.B. --'~J ~NSULTANTS, INC. TE: FEB. 1972 I .................................... --J LL_'"'i ....... 1FFB N/A J jLDWG ,,:0 - EXPLANATION OF SELECTED SYMBOLS EXPI.~\NATION OF ICE SYalBOLS Percentage of v£sib!e ice has been grouped for the purpose of designating the amount of so{i {ce content. These groups have arb{trarHy been set out as follows: 0% 1%- lo% 2~.%: 35% >35% No Visible Ice Little Visible Ice Occaslonal Visible Ice Some Visible Ice Considerable Visible Ice The ice descript{on system is based on that presented by K. A. L{nell~ and C. W. Kaplar (I966). In this system, which {s an extens{on of the Unified Soil Class{fi{cation System, the amount and physical characteristics of the soil {ce are accounted for. The foltowhng table {s a brief summary of the salient points of their class{ficatlon system as mod{fled to meet the needs of this study. GROUP SYMBOL V ICE DESCRIPT ICE VISIBII_JTY 8~ CONTENT Ice not visible Ice visible, <50% Ice visible, >50% ICE ONS SUBGROUP DESCRIPTION SYMBOL Poorly bonded ~' Nf or friable hqo excess [ Nbn Well- [~c_e_. _ _ _ Nb I---- bonded I Excess lice Il Nbe Individual ice cr~'st als or Vx inclusions Ice coatings Vc on porticlgs Random or irregularly V r oriented ice formations Stratified or distinctly oriented Vs ice formations Ice with soil ICE 4-- incIusions soil type Ice without ICE Individual layer >6" thick * son inclusions · In some cases where the soil is ice poor o thin ice layer may be coiled cut by special notation on the log, i,e. 2" ice tens at 7~ M tier, rE 3- I- 72 CONSULTANTS, INC. EXPLANATION OF ICE SYMBOLS ' l I SCALE N/A OWN BY LDS