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Home My WebLink AboutSUE TAWN ESTATE #2 S-10780'l'Qwrl $1 py Hollow - 10780 Municipality of Anchor, age .Development Services Depart~hent Building Safety Division MEMORANDUM DATE: TO: FROM: SUBJECr: 06/13/01 SerryT. Weaver, Jr., Pla~ingOflicer, CPD James Cross, pE, ProgramManager, On-SiteWater&Wastewater .3mSients on Cases dueJune 14,2001 The On-Site Water & Wastewater Program has reviewed the following cases and has these comments: S - 10779 S - 10780 S - 10781 Skyhills Subdivision Phase I No objections. Sueta%vn Estate #2 / Sleepy hollow Subdivision #I No objections. BLM Lot 198, T15N, RIW, See 18 Information to satisfy the requirements specified by AMC 15.65 and AMC 21.15 must be submitted for each lot of this proposed subdivision. This information must include, but may not necessarily be limited to: 1. Supporting documentation on water availability must be provided. MUNICIPALITY OF ANCHORAGE COMMUNITY PLANNING AND DEVELOPMENT P.O. Box 196650 Anchorage, Alaska 99519-6650 PRELIMINARY PLAT APPLICATION OFFICE USE REC'D BY: A. Please fill in the information requested below. Pdnt one letter or number per block. 1. Tax Identification No. 2. Street Address ~.~-o~ I~o I~ ~'Hd~l~lslolllol~l ~_~ssl~,l I~-I~l~lel ~ I~ol01~1~,1~1~ I~1~. ~'o51 ~o t o~ 3. NEW abbreviated legal des~ption ~12N R2W SEC 2 LOT 45 OR SHORT SUB BLK 3 LOTS ~). 4. EXISTING abbreviated legal description (T12N R2W SEC 2 LOT 45 OR SHORT SUB BLK 3 LOTS 34) full legal on back page. IsLl~l~lel~l no,.l:-Iol~ I.Io[ I:l I~,~1~ Itl/~-Iol'r!-sl I"l I~1 Ist I I I I I I I 5. Petitioner's Name (Last - First) IIIIIIIIIIIII/lililll Address City ~ROGI Phone ~ ~ Zip I~/i~l I I I I I I Irlll Address Phone # P~X# Petitioner's Representative State 7. Petition Area Acreage 8. Proposed 9. Existing Number Lots Number Lots 10. Gdd Number Ilillll 11. Zone IIIIIII 12. Fees ~.~) o O O 13. Community Council B. I hereby certify that (I am) (I have been authorized to act for) the owner of the property described above and that I desire to subdivide it in conformance with Chapter 21 of the Anchorage Municipal Code of Ordinances. I understand that payment of the basic subdivision lee is nonrefundable and is to cover the costs associated with processing this application, that it does not assure approval of the subdivision. I also understand that additional fees may be assessed if the Municipality's costs to process this application exceed the basic fee. I further understand that assigned hearing dates are tentative and may have to be postponed by Planning Staff, Platting Board, Planning Commission, or the Assembly due to administrative reasons. Date: ~'~10/~O o I ~'"~. ~ ~ ,, st provide written proof of authorization. 20-003 (Rev. 6~00)* Front Co Please check or fill in the following: 1. Comprehensive Plan -- Land Use Classification , ~' Residenfial I.l/t,. I'.J//~ Commercial 14/~, Parks/Open Space kJ/A. ~t/f[ Transportation Related Marginal Land CommerciaFIndustdal Public Lands/Institutions I'.J/~¥ Alpine/Slope Affected · kt/~',' Industrial .I.[/p,,. Special Study 2. Comprehensive Plan -- Land Use Intensity / I,J//'k-' Special Study Dwelling Units per Acre /,,l//t Alpine/Slope Affected Environmental Factors (if any):/ a. Wetland I",J/1~ b. "c". ' c. 2. r4 d. Avalanche Floodplain Seismic Zone (Harding/Lawson . D. Please indicate below if any of these events have occurred in the last five years on the property, Rezoning Subdivision Conditional Use Zoning Vadance Case Number O~) -- O J ~,, . Enforcement Action For Building/Land Use P~rmit For Army Corp of Engineers Permit Case Number Case Number Case Number Legal description for advertising. Checklist ~J//~ 42 Copies of Plat (Long Plat) ~ 32 Copies of Plat (Short Plat) ~ Reduced Copy of Plat (8 ~ x 11 ) ~ Certificate to Plat I'J¢,~' ,l~Jk,Aerial Photo ~/~ Housing Stock Map ~ Zoning Map Fee Drainage Plan Topo Map 4 Copies Soils Report 4 Copies t',.J/~. Pedestrian Watkways I,J/J'~ Landscaping Requirements Waiver Water: Sewer: ~.oo3 Back (Rev. 6~0) ° Pdvate Wells Private Septic Community Well Community Sys. Public Utility Public Utility PERFORMED FOR: LEGAL DESCRIPTION: 1 3· 7 8 9- 11- 12- 13- 14- 15 18. COMMENTS Municipally DJ Anchorage DEPARTMENT OF HEALTH & HUMAN SERVICES 825 'L' Street, Anchorage. Alack,, 99502-0650 SOILS LOG --. PERCOLATION TEST ELOPE lITE PLAN WAS GROUND WATER ENCOUNTERED? DEPTH? PERCOLATION RATE ~ (mln~eMnch) PE~IC HOLE DIAMETER TEST RUN BETWEEN ~/? FT AND "/ FT PEF~O~MED aY: S & S ENGINEERING I CERTJFY THAT Tl*~S TE~T WAS PERFORMED IN , Rd)raj Ne. 204 EFFECT (:*~ TlaS DATE. DATE' ~/1~ 170~4 ~ Riv~' Loop N ACCO~DANC£ ~/1T~ ~~1. GUBOELINE$ IN ~24X~ (Rev. $,t0.7..8 0 J JN ! G 2001 CONSULTING ENGINEERS 1940 PO~T RO~D-.N4CHO~AGE, ALgSga'-99501 TELF. J~:)e~, 907-279-2581 R.8. O,NdS pr. WiT~t,.,I ~.~.L[~ ~'~. ~" AFFILIATEO ALASKA TESTLAB~ Assoc~A~[s R. t~ HUNT July 24, 1972 W.O. 11722 Gross Construction Company 841 West 74th Avenue Anchorage, Alaska 99502 $10780 JUN I 82001 SUBJECT: Soils, Sleepy Hollow Subdivision, Addition !1, Peters Creek, GAAB, Alaska Gentlemen: In accordance with your request, we are currently making a sub- surface investigation of the subject project; included herein is our preliminary report. Following the text are: Test-pit logs Sheets 1 to 5 Standard explanatory in£or~ation Sheets 6 and 7 Test-pit location sketch Attached The proposed subdivision is located within West 1/2 of Sec. 15, T. 15 N, R.1 W., S.H., Alaska, and totals approximately lO0 acres. The bulk o£ development will be confined to 27 parcels totaling about 80 acres; two tracts comprise the remaining 20 acres. In order ~o adequately evaluate the subsurface conditions within this subdivision, we have recommended that a minimum o£ ten test holes or test pits be made within the 100 acres. However, because of access problems due to steep grades at the present time, you were able to excavate by backhoe only four test pits to the recommended depth, t/forts were made to complete the remaining test pits by blasting, but these were not successful. As soon as access becomes satisfactory for.~rilling or backhoe equipment to reach the remainint localities, the subsurface investigation should be completed. All test pits were logged by Mr. Oztas Hatch, our senior tech- nician, on Suly 19, 1972. The writer visited the site on July 22, 1972. The five test pits, including one S-ft. test pit, indicate that the site soils consist of a thin ground cover of organic materials about six inches thick, and frost-susceptible sandy silt and silty sand, i to 2-1/2 £eet in thickness, all overlying extensive glacial deposits o£ nonfrost-susceptible (NFS) sandy gravel and gravelly sand to the depths o£ exploration. Gross Construction ~o, 2 W.O. 11722 With regard to subsurface conditions for the proposed development~ the only precaution item should be slope stability only in those areas with significant grades (not road grades) where residences are planned~ as the subdivision has a prominent blu££ area below the higher ground (plateau). If construction in these steep areas is the case, routine slope-stability analyses should be performed. In all other aspects~ tho granular soils (sandy gravel and gravelly sand) within the subdivision appear to be consistont~ we11-drained~ and su£fici~ntly dense to provide a ~ore-t~n-ade~uate pe~for~,ance for £oundat~on and development purposes. The sanay gravel aha gravelly sand deposits are su££iciently permeable, an~ thus are very suitable for percolation o£ individuaz seepage pits. Cor- relation between and consistency o£ the test pits is excellent, and we anticipate that th? remaining test pits will indicate similar subsurface condit~ons. In our opinion~ no foundation conditions have been found to date which are unsatisfactory or prohibitivo~ and which would warrant impedence to this pro~ect. As soon as site access is improved~ the remaining exploration can be completed. Very truly yours~ ACLW Consulting Bngineers Approved: P~t:ld CLIENT GROSb CONSTRUCTION~ PROJECT SLEEPY tlOLl,Ol~ ~EST PIT t ELE~ EXISTING GROUND SnEt:T [ or '7 W..0. NO, 11722 CLIENT GROSS CONSTRUCTION JULY Igc 1972 PROJECI' SLEEPY IIOI, LOr/ SUBD/~4~,dN W.O.NO._..!1727 .TEST PIT :/ ELEV.,I~XISTING GROUND - - - ~5 ~/~'' - - - _-- ~, r2, ~, ~,d,~.-~ ~,/~ ~ _-- - 0 4~' (tx) - -- ~ /o~ '.. crz ) _-- ELIENTGi~O$S CO.~!$T.RUCTION ~ pKoj£C~- S~oEEPY HOLI,Oit SUBD~N DATE JULY 19~ 1~72 ~ W.O.NO.~722 ~ .TEST PIT ~ ELEv. EXISTING GROUND CLIENT GROSb CONSTRUCTION ~-"~) DATE JIH,¥ ]9, PROJECT SLEE~Y tlOI, LOI~ SUBD/~[,~N W.O~NO. 11722 CLiENT.GROSS CONSTRUCTION DATE 3ULY ]9, 1972 PP, OJEC"I' SLI~I!PY IIOLLOI~[ SUBD~N W,O,NO,_ 11722 .TEST PIT ALASKA TESTLAB CONSULTATION · TESTING · EXPLORATION 0 CHEMICAL 0 MATERIALS 0 INSPECTION, SOIL CLASSIFICATION CHART $0% GRAVEL AVE L % 0 I0 t~O 30 40 50 60 70 80 90 I00 GRAVEl. 1+~4SCREENI % BY WEIGHT NONFROST SUSCEPTIBLE SOILS ARE INORGANIC SOILS CONTAINING LESS THAN $°/o FINER THAN O.02mm. GROUPS OF FROST-SUSCEPTIBLE SOILS~ FI GRAVELLY SOILS CONTAINING BETWEEN 3 AND 20% FINER THAN O.OZmm. F2 SANDY SOILS CONTAINING BETWEEN ~ AND 15°/o FINER THAN 0~2 mm. FS o. GRAVELLY SOILS CONTAINING HORE THAN 200/0 FINER THAN O.02mm. AND 9ANDY SOILS (EXCEPT FINE SILTY~ SANDS) CONTAINING MORE THAN IS°/o FINER THAN O.02mm. b. CLAYS WITH PLASTICITY INDEXES OF MORE THAN 12. EXCEPT VARVED CLAYS. F4 0. ALL SILTS INCLUDING BANOY SILTS. b. FINE SILTY SANDS CONTAINING MORE THAN 15% FINER THAN O.OZmm. c. LEAN CLAYS WITH PLASTICITY INDEXES OF LESS THAN 12. d. VARVED CLAYS. TEST HOLE LOGS ~OJL8 The soil d~scrtptlons shown on the leos are the best estimate of the soft charac- teristics at the time of field examination. Such examinations do not achieve the precision of laboratory tests for the various properties° 1. The relative type of soil and the frost classification is shown on the sheet "Soil Classification Chart." 2. Other criteria.' Boulder - greater than 8" Gobble - approximately 3" to 8~ Blow Count - blows/6" of 140 lb. weight falling 30"; 2" split spoon. (The standard penetration ts blows/12".) Density - estimated by the rate of drilling, type of soil, blow count and moisture range PL ' Plastic Limit, moisture content being approximated as; above (+) or below (-) plastic limit (PL) or liquid limit (Lw) as appropriate Lw - Liquid Limit, see PL Dilatency - is tho ability of water to migrate to the surface upon vibration or Jolting of a sample, an aid tn determining whether a soil is pro- dominately a clay or silt Well graded - uniformity coefficient greater than 7 Poorly graded - uniformity coefficient less than 7 (Uniform p~rticles, gap graded) Organic Content - estimated by volume, not particularly precise Clayey Soils - a field method now being used as an aid to identification of these soils as a combination ball drop, and rolled thread test in which a 2" diameter l~ll of the Sand-Silt-Clay fraction is dropped 2' until a 1" thick pat develops. The diameter of a .thread at crumbling rolled from the resultant pat determines whether cla,y or silt predominates. Dry Strength - a small sample of the soil is formed into a cube and air dried, and crushed between the fingers. High dry strength indi- cates clays and low indicates silts, Water Table .- the apparent water table at the time of observation. Often the actual water table may be higher unless tho hole is allowed to remain open or is converted to an observation well. Capillary Fringe - change from moist to very damp, or saturated soil, usually indicates that water table is close. Peat - Fibrous material of macroscopic and microscopic fragments of de- cayed vegetable matterl very compressible, unsuitable for founda- tion or embankment. Color light brown to black. Ao - The upper layer, surface soil or topsoil, containing humus and/or organic debris, not satisfactory for foundation. ALASKA TESTLAB