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HomeMy WebLinkAboutT12N R3W SEC 23 NW4Co ry Club E S-2630 GP~]ATER B/~CHORAGE AREA BOROUGh~i~ 3500 Tudor Road Anchorage, Alaska 99507 PLAT STATUS: Final DATE: March 21, 1972 BOROUGH: Platting Engineer Public Works Department ~ep~Z_iim_aiz~ of Environmental Qu_q~ality Fire Department Street Names Tax Appraisers School District CITY OF ~%NCHO~\GE: Fire Marshal M~nicipal Light & Power Department Property Management Officer 9ublic Works Department Telephone Utility Traffic Engineer Water Utility OTHER: Alaska Department of Highways Alaska Railroad Anchorage Natural Gas Corp. Central Alaska Utilities Chugach Electric Association GAB Telecommunications, Inc. Matanuska Electric Association Matanuska Telephone Association Assistant Superintendent of Mails Alaska-Department of Fish & Game DESCRIPTION OF PROPERTY: Country Club Estates OWNER: Spencer Developement Corp. A petition has been received by the Greater Anchorage Area Borough Planning Department for the proposed Subdivision of subject property for the April 19, 1972 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 d~partment or agency may need. If ~..,e dd not hear from you by __~!1 ~1_9__72 do not wish to submit any comments. , we will assume that you If you 1lave no further ~se for the attached print, please return it with your Planning Department I!nclosure Av ~ >U~ 717 ['. 9th '~'~ .rw;chorage ~ A1 as~a ..... J c~: Col~ntry Club Estates. Ai:i:e~)~'~',..1,_,h; ',!ii!lam .... ~: ,lohnson The Greater Anchorage /!rea ~)ore,.Imh, !)er, ar'Sl~L'=,'~ of Lnv-Jro~l- m~ntal Ouality h~s receive?, ~.s ~niis r~?orts fm)m R ,:~ '~ 2. Potable Wat,.'~r Availability well site i~ the northern cul-de~.sac. !~!e will require that to all lots. 'Jo. will require a bimii~'~g l(qa! aqreem~nt te this effect mrom the dove]ophir prior tm nut r~pt~rovat 3. Sewage Disposal gecaus~ of the moor soils, high surface water table 2 below surface at testhol~s #1 and ~2) and the 'two streams runni~'~9 through this ~rea, we recommend a community sewerafi~ colt~ction and disoosal system. Like th~ communlt~ ~ater systenl, we will req~:iro ~reliminar,F ~r, gineerfnR olans he aooroved, a binding legal commitment from the devclo!)er provide this s(~rvtce, a~)d a defi))ite date by which this vicm will be ~rovided prior to our recommmndation of amproval for ~his plat. Our major concern is tha+,, there ,.~(. come? ,method whorei!~, wo can assurr~ the public that once the subdivision is approved, ~lilltam E. Johnston March 22, 1972 Page Two they will be able to build on e ootabl(> water supply and an disl~osal. Should yo(l have any Questions con~ (:t the undersigned $ircerely, these lots and have access to acceptable " ' . re¢;ard~ ,~ our r(~view, please Roll R. Strickl~)nd, Assistant Director c¢: Dick ~lasheen R&M Civil Engineers ENGINEERING & GEOLOGICA ' CONSULTANTS. TELEPHONE 907-279-0483 TELEX 090-35419 ~E~ Geologists Land Surveyor~ JAMES W. ROONEY, P. E. MALCOLM A. MENZIES, P,E., L,S. JAMES H. WELLMAN, P.E, February 22, 1972 RALPH R. MIGLIACClO Mr. William E. Johnson Alaska Planners, Engineers and Surveyors 71Z ]42asr Ninth Avenue Anchorage, Alaska 99501 Subsurface Soil investigation for Sewer Systezn Development. R & M Project Nc>. Z5102 Dear Mr. Johnson: We are sub~;~ittlng herewith the test boring results and our comments regarding sui] tondlt'ions encountered at the subject site. This investi- gat/on was perfor~rzed tu accordance with your verbal instructions of b'ebrnary 1Z, i1¢)7Z a:.l !hose ~rocedures outlined in a letter dated Septembe, J3. l:i~r] !~, ~ Mr, Roll Str~ckland of the Greater Anchorage Area Borough ])e]~artzuen[ of F~nvirmzmental Quality. A ,oral of three (3) test hc~:~ were put down within the plated area for Ibc purpose of defining general subsurface soil conditions. Drilling was accomplished usin~ a tr.ck-mounted highway anger having an 18 inch d~a~:~ete, single-JT~ght a ,gcc bit. Samples were recovered from repre- senta~ixe strata and .eta~ned ~o. ll~OJsture con~ent and grain size analysis. )".hal Jogs 1o~ Ih~ ~est bot'~:ag,; n:~ve been prepared and are included on J~)pav,,Jhj; A-O1 (}rani size aJ~;]l;:;Js curves for selected samples have also [)~ {.n plotlved a~ct are SitO'--n Otl Drawing A-OZ, The boring lot:arb,ns were se]et'ted with the inten(ion of defining the apparent major soil tulSis, l'k.se l~c:ations, as tu~erenced by Alaska ~)lanuers, F]ngi,teers and YSi~.x,(,,..,~)~s, are indicated on t:he subznitted plat, February 22, 1972 Mr. William E. Johnson Page 2 Test Hole No. 1 was located adjacent to Little Campbell Creek and is considered to represent the lowland area immediately adjacent to the creek. The material encountered in this boring consisted of an organic material (peat) which extended to a depth of 9.0 feet. At this depth a sandy silt was encountered; however, the boring was terminated at 10 feet below ground surface due to sloughing within the hole. In Test Hole No. 7. an organic material (peat) was found to extend from ground surface to a depth of 1.5 feet. Below this depth, a gravelly sand with some silt was encountered. This material transitioned with depth to a sandy gravel containing a trace of silt, The material encountered in Test Hole No. 3.was similar to that found in Test Hole No. 2. The organic layer was only 0.5 feet thick and the granular material transitioned from a sandy gravel with some silt to a gravelly sand having varying percentages of silt, Test Holes 2 and 3 were both terminated at a depth of 10 feet below ground surface. Seasonal frost was found to extend to depths of only 1.0 to 1. 5 feet below ground surface. Both the heavy snow and organic cover have served to minimize heat loss from the ground and thus limit frost penetration. Perched ground water was encountered in Test Holes No. 1 and No. 2. In Test Hole No. 1 the water was observed to be seeping from different levels in the organic material while in Test Hole No. 2 the water appeared to be seeping into the hole from the base of the organic layer. The soil conditions at the site are typical for the lateral moraine deposit which extends along the footslope of the Chugach Mountain Range. The material and the extent of this deposit has been generally described by Miller and Dobrovolny in the Geological Survey Bulletin 1093. The predominant till material, as found in Test Hole No. 2 and Test Hole No. 3, has been described as being looser in the upper brown weathered zone. This material normally transitions to an under- lying more dense light gray stoney till. The peat deposit generally appears to occupy a kettle or low area within an abandoned ice mar'gin channel. R&M ENGINEERING & GEOLOGICAL CONSULTANI~S February 22, 1972 Mr, William E. Johnson Page $ Because of frost conditions and the amount of snow and surface cover, it was not possible to define any transition zone between the deeper peat deposit found in Test Hole No. 1 and the shallow peat depth in Test Hole No. Z. This information could be obtained by probing with hand tools and would allow optimumizing placement of structures, driveways and sanitary facilities within designated lot areas. If you wish, we would welcome the opportunity to review plans or other related submittals after they are prepared for the subject project so that we might have a chance to comment on the effect of soil conditions upon the design. Very truly yours, ~__.~ ~_~w~ig,~'~: .... ~..~>...- R&M ENGINEERING & GEOLOGICAL CONSULTANTS T. II. 1 2-15-72 Toll. 2 2-15-72 0! ORGANIC MATERIAL (PEAT) Wate~ seeps at and below 2.0' 4&~f~ SANDY STT,T W/ORGANICS 9.-5'., 28% SANDY SILT 0t ORGANIC MATERIAL (PEAT) 1.5' Water seeps at 2. 0' (~) 14% GRAVELLY SAND W/SOME SILT 9' S^ND¥ SrLT W/ORGA r, S~, 9.5' , SANDY GRAVEL W/TRACE SILT 10'T. D T.H. 3 2-15-72 0~ ORGANIC MATER~AI, %P.~,AT) 10% SANDY GRAVEL W/SOME SILT 6.5' GRAVELLY SAND W/SILT 10'T. D. NOTE: Test borings were drilled utilizing a "Highway Auger" wi~h an 18" diameter single-flight auger bit. All samples recovered from auger cuttings returned ~o the surface. R ~ M ; ] Country Club Estates CONSULTANTS I~///~JL~n¢ no ray e, Alaska FAIRBANKS Ak[ASlKA JUNEAU I N',IBY %½~.D ]DATEZ-]7-72 IPROO. NO, ZS10Z :: : JCHKD. ~Y T~VR ]SCALE ]"=3' V~T~WG. NO. A-O1 · SOILS · CLASSIFICATION, CONSISTENCY AND SYMBOLS CLASSIFICATION: Identification an~ classification of the soil is accomplished in accordance with the Unified Soll Classification System. Normally, the grain size distribution determines classification of the so{1. The soll ls defined according to major and minor constituents with the minor ~Iements 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 part- {cles are such that the clay dominates soll properties. Minor soil constituents may be added to the classification breakdown in accordance with the particle size pro- portion listed below[ i.e. sandy silt w/some gravel, trace clay. no call- 0 - 3% trace - 3 - 12%.. some - 13 - 30% SOIL CONSISTENCY - CRITERIA: Soil consistency as defined below and deter- mined by normal field and laboratory methods appI{es only to non-frozen material. For these mater{ali, the influence of such factors as soil structure, i.e. fissure systems, shrh~<age cracks, sllckens{des, etc., must be taken into consideration in making any correlation with the consistency values listed below. In permafrost zones, the consistency and strength q~ frozen soils may vary significantly and unexplalnably with ice content, thermal regime and soll type. Cohesionless Cohesive N* (blows/Et Loose 0 - 10 Medium Dense 10 - 30 Dense 30 - 60 Very Dense - 60 *Standard Penetration "N" Relatlve Density T - (tsf) 0 to 40% Very Soft 0 - 0,25 40 to 70% Soft 0.25 - 0.5 70 to 90% Stiff 015 - 1,0 90 to 100% Firm l, 0 - 2.0 Blows per foot Very Firm 2, 0 - 4.0 Hard - 4, 0 of a 140-pound hammer falling 30 inches on a 12-{nth OD split-spoon except where noted. DRILLING SYMBOLS WO: Wash Out WD: WL: Water Level BCR: 'WCI: Wet Cave In ACR: DCh 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 tJanes indicated. In pervious unfrozen soils, the indicated elevat{ons are considered to represent actual ground water conditions. In impervious and frozen soils, accurate determinations of ground water elevations cannot be ob~ rained within a limited period of observation and o~her evidence on ground water elevations and conditions are required, I='NGIN~"n"RING AND GEOLOGICAL CONSULTANTS JUNEAU DATE GENERAL NOTES PROd. NO. GENERA[, 1-20-72 SCALE N/A DWG. NO. 8-OI STANDARO SYMBOLS SANDY SILT SILT GRADING TO SANDY SILT SANDY GRAVEL, SCATTERED COBBLES (BOCK FRAGMENTS) [NTERLAYEREO SAND ~ SANDY GRAVEL SILTY CLAY w/TR. SAND SAMPLER TYPE SYMBOLS SI ..... 1.4" SPLIT SPOON Ss,.. L4" SPLIT SPOON SI . .. 2.5" SPLIT SPOON Sh . . · 2.5" 'SPLIT SPOON Sx . . . B.O" SPLIT SPOON Sz... 1.4" SPLIT SPOON Sp... 2.5" SPLIT SPOON, Hs . . o 1.4" SPLIT SPOON NOTE: WITH 47-~ HAMMER Ts.. WITH 140~ HAMMER Tm.. WITH 140~ HAMMER Pb.. WITH ~,40-~' HAMMER Cs.. WITH 140# HAMMER Cd.. WITH 340/~ HAMMER Bs.. PUSHED DRIVEN WITH AIR HAMMER SHELBY TUBE MODIFIED SHELBY TUBE PITCHER 8ARPEL CORE BARREL WITH SINGLE TUBE CORE BARREL WITH DOUBLE TUBE BULK SAMPLE A ..... AUGER SAMPLE G ..... GRAB SAMPLE 2.5" SPLIT SPOON DRIVEN WITH AIR HAMMER SAMPLER TYPES ARE EITHER NOTED ABOVE THE BORING LOG OR ADJACENT TO IT AT THE RESPECTIVE SAMPLE DEPTH. SAMPLER 'T YPE'*,,S$ ~YA TER GP`ADATIONAL TYPICAL BORING LOG BOP`lNG NUfifBER.-~,,..~ H, ;50- 15 Elev. 2~?4.B '~ ~L~V~TION/N FE~T DATE DPILLED~io_ 21. 70 All Somples ORGANIC MATERIAL CO~sid VisJblelce 0'-~' ICE -SILT Estimete 65% V~siblelce SANDY SI LT /AppROXI~AT~ STRATA CHA~G~ Lilt~e to NoVisib~e Ice ~'-~0' Vx ~IC~, DE8CRIPTION ~ CLA~IFICARON ~ 72, 57~ °Jo, 85 99cf, ~8~ GP (CORPS OF E~GINEERS lP:THOD) Ss ~ ~ '~ ~ ~ ~ ~UNIFIED OR FAA CLASSIFICATION ~ ~ ~ ~ ~T~/~P~nATUR~°F ~-- ~LOV/S/FOO T SANDY GRAVEL ' Cd 95 SCHBT ~GENE~ALIZED ;AIHPLE LOCJT/ON ~O~ D~lLL DEPTH FROZEN ~ VZO.-Y/HILE DRILLING, A.L~-AFT£P` BOP. lNG Engineering & Geologlcal Consul ?ants EXPLANATION OF SELECTED 'SYMBOLS GLB [PROJ, NO. GENERAL !mwo NO. B-02 DATE 2-16-72 tSCAL~ NONE !OWN BY LDS 1CHKD DY M~J:I M£~ i© .<.,, g, I,i i 0 000£1 ,00