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HomeMy WebLinkAboutLot 02 - 05~uly"16, 1973 Greater Anchorage Area Borough Dept. Of Environmental Health 5500 Tudor Road, Pouch 6-650 Anchorage, Alaska 99502 Attn: Rolf Strickland Assistant Director Subject: Great Land Estates Subdivision Dear ~lr Strickland: The following is a brief description of soil conditions as they relate to Unit No. 3 of Great Land Estates Subdivision which is being revised and resubmitted to the Planning Commission. The general description as depicted by my letter of ~arch 27, 1973 (copy attached) continues to apply to the entire unit, but more specifically the ensueing information is provided to stay concern as to the ability of Lots 2 thru 5, Block 4 (as revised) to handle on site sewage facilities. Actual field information was derived from two excavations made at the locations shown on the attached plat. Each excavation was bottomed out at approximately 11'-12', it being difficult to proceed beyond this depth because of cave-in. The material encountered in both excavations was similar. In each case an organic/silt overburden approximately 12" in depth was underlain by glacial till which continued to the bottom of the excavation. Both excavations contained cobbles which varied in size from 6 to 12 inches in diameter. Excavation No. I consisted of brown sandy gravel containing some silt in the layer between 12 and 48 inches. Excavation No. 2 consisted of brown sandy gravel with "very" clean gray black sand from approximately the four foot level to the bottom of the excavation. Observations made of both excavations 48 hours after they were opened indicated no ground water. Based on this and the relief as depicted on the topography map submitted with the plat, no ground water problem is anti- cipated. As the minimum lot size along Peters Creek in Unit NO, 3 is approximately one and two-thirds acres, and as each lot contains over an acre of land suitable for on site sewage disposal no problems are anticipated. S- 2694 PLAT STATUS: Final GREATER A~ChOtb\G, AREA Anchorage, Ala'ska 99507 g DATE: ~May 2, 1972 BOROUGH: Platting Engineer Public Works Department D~e~ rt~rent of Environ~'.~fit~ Q~uality Fire Department' Street Names Tax Appraisers School District CITY OF ANCHORAGE: Fire Marshal Municipal Light & Power Department Property Management Officer Public Works Department Telephone 'Utility Traffic ~ngineer Water Utility O%HER: Alaska Department of Highways Alaska Railroad Anchorage Natural Gas Corp. Central Alaska Utilities Chugach Electric Association GAB Telecommunications, Inc. Matanuska Electric Association Matanuska Telephone Asseciation Assistant Superintendent of Mails Alaska Department of Fish & Game DESCRIPTION OF PROPERTY: G~'aat Land Estates OWNER: Marianna & wil'liam J.'Koehler Gentlemen: A pe·t~tion has been received by the Greater Anchorage Area Borough Planning Department for the proposed Subdivision of subject property for the May 31, 1972 Planning Comm~ission 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 h~ar from you by ~y 18.~ 1972 , we wiil assume that you do not wish to submit any comments. If you have no further usa for the attached print, please return it with your C omP,1 e n t s, Planning Department Enclosure ~rch 27, 1973 Greater Anchorage Area Borough Dept. Of Environmental Health 3500 Tudor Road, Pouch 6-650 Anchorage, Alaska 99502 Attn: Roll Strickland Assistant Director Subject: Great lands Estates Subdivision Dear Mr Strickland: The following is a brief description of soil conditions as they relate to Unit No. 3 of the above referenced subdivision, As previously related by memo dated September 4,1971 , the subdivision lies within "..- sorted and unsorted drift of the Naptowne glaciation..." which formed "... deposits of advance outwash, lateral and ground morraines, pitted outwash, and ice contacts, of sand and gravel.., advance of the Wisconsin ag~..." ( Dobrovolny and Miller, 1959 ). Actual field information was derived from five visual sources: l} Backslope of Bi~ Sky Drive adjacent to Lot 2, Block 5. 2) Back,lope of Gtlugacn par~ ~rive aa3acelit to Lot 2, BloCk 7. 3) Backslope of Great Land Circle adjacent to Lot 5, Block 3. 4)'Escarpment face in Lot 4, ~zoc,, 4. 5) Backslope of Creek Road adjacent to Lot 5, Block 5. Ail sources showed an organic/silt overburden of 12"-24" in depth under- lain by morraine and outwash deposits of gravel till. The glacial till in sources 1,2,4 & 5 consisted of sandy gravel to gravely sand. The glacial till in source 3 consisted of silty sandy gravel. Ail sources would exibit excellent perc characteristics. A sample from each source is available for your visual inspection should you so desire. Mr. Rolf Ro Strickland~ RoS. Environmental Health Supervisor GAAB Health Department 3500 Tudor Road Anchorage~ Alaska 99502 Dear Mtn Strickland RE: SOIL CONDITIONS Great Land Estates Subdivision SW ~t, Sec 10, T15N, R1W, S.Mo The following is a brief description of soil conditions as they relate to the above referenced subdivision. More detailed physiographic analysis can be obtained in Geologic Survey Bulletin ].093, "Surficial Geology of Anchorage and Vicinity Alaska" by Dobrov01ny and Miller~ and "Geologic Map of Alaska" by Dutro and Payneo The subdivision lies within "..o sorted and unsorted drift of the Naptowne glaciation ..." which formed "... deposits of advance outwash, lateral and .ground morraines~ pitted outwash, and ice contacts of sand and gravel ..o advance of the Wisconsin age .o." (Dobrovolny and Miller~ 1959)o Actual field information was derived from four visual sources:' Back slopes.along the old and new Glenn Highway in the immediate vicinity of Great Land Estates Subdivision° Examination of the escarpment face between Block 2 of Great Land Estates and Peters Creek Valley floor° ~/ Cut banks along the access road leading into the subdi- vision and also along Great Land Circle (a street within the subdivision. ~/ Test holes in Block 1 of the subdivision. Ali sources show an organic/silt overburden of 12"-24" in depth underlain by morraine and outwash deposits of glacial till consisting of sandy gravel, grave!~ and gravelly silt. Test hole depths of 11' revealed no change in the till strata. Permafrost conditions are not known to exist within the confines of the subdivision. Should you need any additional information., please do no hesitate to contact ibis // Anchol September 4, 1971 Flat Status; GREATER ANCHORAGE AREA BOROUGH Anchorage, Alaska 99S0~ Preliminary Date: 8-2446 July 7, 1971 BOROUGH: Engineer Public Works Department Sand lmke }:ire Department School District Street Names Tax Assessor Alaska Department of Highways Alaska Railroad Anchorage Natural Gas Corp, Central Alaska Utilities Chuga~ Electric Association CITY OF ANCHORAGE: Fire Marshal Mm~icipal Light fi Power Department Property Managemen~ Officer Public Works Departmant 1%lephone Utility Traffic 5zgineer Water Utility GAB Telecomnunica~ions, Inc. Matanuska Electric Association Matanuska T~lephono Association Assistant Superi~)tondent of ~dails Re: Subdivision / ~]~g_iJcbftlMlxxX Description of Property: Great Land Estates OwRer: Koehler Gentlemen: Petition has been received by the Greater Anchorage Area Borough Planning and ZoniBg Com~mission for the proposed _~Subdivision of subjec~ property. Atta~:Y. ed i~ a copy of the proposed plat. ~ill you p/ease submit your comments in writing, specifying any easements or other requirements that your depart- ment or agency may need. If we do not hear from you by July 23, 1971 , we will asst~ that you do not wish to submit any comnents. If you have no further use for the attached print, please return it with your co~l~ntso Enclosure Planning Department GREATER ANCHORAGE. AREA .,..~n~,m~r, .,~v...~ I Departme.ht of Environmental Quality ,~ E ~' '~ R A N D U h September 8, I~71 TO: PI ant,' i mg ~)tck Gl-ashecn F ROt:i: SUB J,~CT: Rolf Strickl~d, R.S. Assistant Oirector The e~gineer on this pa~ticul.ar subdi¥ision l~as pro,iided to this ge~:',~rti~)t:.')}t ~'~(~ici~:~r~t ~fn~:~iae:~:rinq o~ soils cortd'i~'i~}ns for o~r 3~.-partmc~t to ~ :,CO,,l~,,,.:,,d~ ~ ~'~, ap~>roval o~ thl~ su~),:J~visien' as GRE)~TER A}ICltORAGE AREA BOROUGII Oepartme~)t of Enviro]m~i~tal Ouality i-.i E N 0 R A N D U ~.~ ~ch 29, 1973 TO: FROH: SUBJECT: Al aJ') Scheen Planning Department Rolf Strickland, R.S. Ci)ief Sanitarian S~..,~°~"~', Great Land Esta(~es Subdivision Additional Infomation for Apri I 11, 1973, Neeting The engineer on this case )~as provided rids Department ~dth general soils data for t~e above unit. Soils data ~as derived froh) visual inspection of five cutbanks in t~e subdivision. Apparently tile en- gineer has ),et provided you t~ith this i~)formation so I have had a copy routed to you. Tile soils i,~ffori)iatio~ indicates that the lots in the subdivision wilt bo suitable for on--situ sev~age disposal. Tn~s subdi vi sion no~,~ ~eets our mi nimum requi rerr~nts.