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Home My WebLink AboutSection 23 MUNICIPALITY OF ANCHORAGE Department of Health and Human Services P.O. Box 196650 Anchorage, Alaska 9951%6650 Date: September 8, 1997 To: ~Zoning and Platting, CPD Fr°m~--t U :~(~mes Cross, P.E., Program Manager, On-Site/Water Quality Subject! Request for Comments on Subdivisions - September 12, 1997 Tie Envirom-ne k. ~'-- ~.~ o ~D -~ ~ following cases ; C/I /- . .. ~ . ~/a ~ . . . ~ : ,a. s-~o~so. Or~ ~ ~t~_ . ~ ~ S-10152: T12N R3W Section 15 Lots 100A, ]0lA No objections. S-10153: Dreamcatcher Information to satisfy the requirements specified by AMC 2 [. 15 and AMC 15.65 must be submitted for each lot of this proposed subdivision. This infmrnation must include, but may not necessarily be limited to: 1. Soils testing, percolation testing and gn'ound water monitoring to confirm the suitability for development using on-site wastewater disposal systems. Ground water monitoring must be conducted during high water season in either the fall (October) or spring (April - May). 2. Areas designated for the original and replacement wastewater disposal system sites must be identified and must meet all criteria specified in AMC 15.65 including slope and slope setback requirements. 3. Topographical information must be submitted. S-8386D: S-9864: 94-014: Supporting documentation on water availability must be provided. Michael No objections. Eastown (A.A. - T.E.) No objections. Dowling Subdivision Agreement (T.E.) No objections. MUNICIPAILITY OF ANCHORAGE COMMUNITY PLANNING AND DEVELOPMENT P.O. Box 196650 Anchorage, Alaska 99519-6650 PRELIMIINARY PLAT APPLICATION OFFICE USE FIEC'D BY: A. Please fill in the information requested below, Print one letter or number per block. 1. Vacation Code 2, Tax Identification No. 3. Street Address Fl 4. NEW abbreviated legal description (T12N R2W SEC 2 LOT 45 OR SHORT SUB BLK 3 LOTS 34). ~k~l~¼Mc¼bblM~--I~l I~P144 I¢~,Pl~l !4d41 /111111111111111 5. EXISTIING abbreviated legal description (T12N R2W SEC 2 LOT 45 OR SHORT SUB BLK 3 LOTS 34) full legal on back page, 14 Plckddz. bPl 1ol4 14d~l I~'k.'-Icl Izl.d I~l/Izlq 14slxt lad 14~! I I I 6. Petitioner's Name (Last - First) I~b~14,~--N Iv¼141llllllll IIIIIIIII1,11111111111 Address _.//,_~ .'"~0 City_,,'~V",,/~'~,z~'~-'_ State A~'o Phone # ~ -~:>~B Zip_ ,~'~'/~:~ 7. Petitioner's Representative Address .-~,--'~ ~ ~ ~---'~','~:~Y~o City _ ,,'~"'-/C~,4~ C~- State ,~. Phone// ~. 7,9 '-~(~ Zip__ 8, Petition Area Acreage IIIII1-1 9. Proposed 10. Existing 11. GridNumber 12. Zone Nudnl3er Lots ' Number L~ts 13. Fee $ 14. Community Council /q~/Z~)-/-///-/--~//'~ B. I hereby certify that (I am) (I have been authorized to act for) the owner of the properb/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 fee 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 assig ned hearing dates are tentative and may have to be postponed by Planning Staff. Platting Board. Planning (~mmission. or the Assembly due to administrative reasons. Date: 0~-'0~' -~'~7 - ~ of authorization. Please check or fill in the following: 1. Comprehensive Plan-- Land Use Classification Residential Commercial Parks/Open Space Transportation Related Marginal Land Commercial/Industrial Public Lands/Institutions Alpine/Slope Affected Industrial Special Study 2. Comprehensive Plan -- Land Use Intensity Special Study Dwelling Units per Acre Alpine/Slope Affected Environmental Factors (if any): a, Wetland 1. Developable 2, Conservation 3. Preservation b. Avalanche c. Floodplain d. 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 Variance Enforcement Action For Building/Land Use Permit For Army Corp of Engineers Permit Case Number Case Number Case Number Case Number E. Legal description for advertising. F. Checklist 40 Copies of Plat (Long Plat) 30 Copies of'Pl~t (Short Plat) Reduced Copy of Plat (81/~ x 11) Certificate to Plat Aerial Photo Housing Stock Map Zoning Map Water: Sewer: X Private Wells X Private Septic Fee Drainage Plan Topo Map 4 Copies Soils Report 4 Cop[es Pedestrian Walkways Landscaping Requirements Community Well Community Sys, Waiver Public Utility Public Utility Applicant: Municipality of Anchorage PLA'I-rING BOARD AUTHORITY APPLICATION FOR VARIANCE Address: ,,. Phone Numher: Legal Description of Pro~ Involve: ~ ~ ~~ ~~~ ~ . Present/F~um Use of Pmpe~: T~ Idemfficat~n Numar: This is a reque~ '°r a vadar~e fr°m So'ich A~&~ °f the ~nd ~'~Ms~n Re~'at'°ns' Tiffs widan~ Is ~r: A. The existing s~uat~n is: ~. B. The granting of this pet~ion Before a variance may be granted, the'applicant'must [)rove lhat each of the following four conditk)ns have been fuffilled. Answer each of the cot~itio/~s in detail, using additional sheets it necessary. The unde~Igned alleges that: 1. That there are such special clmumstances or conditions ~ecting said property that the strict application of the provisions of this ordinance would clearly be Impractical, unreasonable, or undesirable to the general p.u~lic.Thesa special circumjLtan,ca._s or condition are: ~?4./z~L/z&:=~7'7' ,z~,,a:N,~c:~'/, .Z'~.~' 2. That the granting of the specified vaflance will not be delflmental to the public welfare or injurious to other properly In the ama in which said properly Is eituated for the following masons: Z/T/~ 3. That such variance will not have the effect of nullifying the Intent and purpose of this ordinance or the Comprehensive Plan of the Municipality for the following reasons.' ',7"/-¢EE--- .-'~K-/'7-'/'/,,~./~' ~?.~,c:t~X;~ 4, The above listed special conditions or dkcumstanoes do not result from the action of the} applicant and such conditic"~s'o~r~'~' circumstances do not merely constitute a pecuniary (monetary) hardship or Inconvenience In that: ..2~/7X-A/_~"-{' /.~'i~a,~Q't~odz~l x~ent ~ignatum of La~d Owner f . Address Ad~re~ 2~-004 (Rev, lO/gl)° Sep-11-97 01:31P Community Plannirlg & Deve 907-343-4220 P.01 CIVIL & ENV1RONMENTA2L ENG[N'EERLNG - ENERGY CONSERVATION & ANALYSIS TH]EODORE F. MOORE, P.E. 1'~530 ECHO ST, PH: (907) 345-1355 ANCHORAGE, A12~q RA 99516 August 14, 1997 Hogan Smelker 12900 Mountain Place Anchorage, A/( 99516 Dear Mr. Smelker: Per your request I have conducted soils tests to assess the feasibility of oonstructing on-site wa~,'tewater disposal f~eilities on a new lot which you propose to create from a portion of the NW ~A, SE ',6, section 23, T12N, ROW, S.M. Soils logs for two test holes, including perc test and groundwater monitoring results, as well as a site, plan depicting the locations of the test holes and possible locations for an original and two replacm'aent soil absorption ~'enches are cmclosed. Much of the proposed lot is Iow lying and poorly drained and there is a sn~il dmina!&e ditch Ira.versing the southwestern portinn, however there is a knoll witt~ higher and better drained soils near the center of the proposed lot. Our soils ,nalysis efforts focused on assessing the fe, asibility of e, onstruethag on-site wastowater dispos~fl systems on this knoll. Two test holes were dug on August 6 to de~ths of 18 and 1 ?.3'. The soils encounter~ were generally silty sands, with cleaner materials encountered in mst hdc ~1, where we m~aanred a perc rate of 4 minutes per inch as opposed to 60 minutes per inch in test hole #2. No groundwamr was encountered in either test hole. On the site plan ! have depicted locations for one original and two repla~;ement trenches which are sized for a 3 bedroom house for soils with a perc rate of 60 minutes per inch. Care will have to be taken to maintain the required 100 foot s~back from surfic~ water and to not let the house footprint encroach on the area needed for the septic system and its future replacements. Please feel free lo give me a call if you have any questions on this report. Sin~rely, Ted Moore, P.E. Sep-11-97 01:31P TEST HOLE Community Planning & D~-~ve 907-343-4220 FLATTOP TECHNIGAL SERVICES 14530 ECHO ST. ANCHORAGE, ALASKA 99516 SOILS LOG -- PFRCOLATION TEST LEGAL DESCRIPTION: portion of NW 114.~SE 1/4, Section 23, T12N~ R3W, S.M. __ August6~ 1997 Hogan Sm_elker Pt. SM Reddish sandy loam ML/SM Gray gravelly silt SM Dense gray gravelly silty sand Many cobblea and boulders E-".asier digging below 7' Vadable composition of stream SM Silty sand Sidewalls smooth Faidy eaay digging DATE PERFORMED: PERFORMED FOR: (teat) 4 14" 20 SLOPE SI'rE PLAN ,10% ~ndwatar | 8/6/~-- ~u Morfrtor tube dry ! 8113/97 Clock I 1:23 Net 33me Reading (minUtes) 12" Presoak 33 30 30 1T55 2:25 C~3MMENTS: P.02 #3 PERCOLATION RATE TEST RUN BETWEEN 12" Presoak Start 5% ~----.~. 10% 10% 0% PercomMer Net Drop Reading (inche~,) 27 3/8 27 3lB 23 15116 23 3/~ ~71S 22 718 1/'2 23 11/16 23 1/8 9/16 60 (mlnute=/inoh) PERC HOLE DIAMETER 7.5 Frr AND 8.9 FT 5u The material encountered in the bench excavated for the parc test was siltier than that encountered in fl~e main teat hole, s0_~e~_rc teat results should be conservatively representative of the entire stratum between 4 feet and 17.3 feet below ground level PERFORMED BY FLATroP TECHNICAL SERV[CFS. I__~__¢,~/ "~'/~M..,..<~._ __ CERTIFY THAT THIS TEST WAS PERFORMED IN ACCORDANCE WITH ALL STATE AND MUNICIPAL GUIDELINES iN EFFEC"r ON THIS DATE. DATE; ~t///./,/¢ ~ CIVIL & ENVIRONMENTAL ENGINEERING * ENERGY CONSERVATION & ANALYSIS TI~ODORE F. MOORE, P.E. 14530 ECHO ST. PH: (907) 345-1355 ANCHORAGE, ALASKA 99516 August 14, 1997 Hogan Smelker 12900 Mountain Place Anchorage, AK 99516 Dew Mr. Sme~er: Per your request I have conducted soils tests to assess the feasibility of constructing on-site wastewater disposal facilities on a new lot which you propose to create from a pmtion of the NW ¼, SE ¼, section 23, T12N, R3W, S.M. Soils logs for two test holes, including pert test and groundwater monitoring results, as well as a site plan depicting the locations of the test holes and possible locations for an original and two replacement soil absorption trenches are enclosed. Much of the proposed lot is low lying and poorly drained and there is a small drainage ditch traversing the southwestern pm~don, however there is a knoll with higher and better drained soils near the center of the proposed lot. ()ur soils analysis efforts focused on assessing the feasibility of constructing on-site wastewater disposal systems on this knoll. Two test holes were dug on August 6 to depths of 18 and 17.3'. The soils encountered were generally silty sands, with cleaner materials encountered in test hole #1, where we measured a perc rate of 4 minutes per inch as opposed to 60 minutes per inch in test hole #2. No groundwater was encountered in either test hole. On the site plan I have depicted locations for one original and two replacement trenches which are sized for a 3 bedroom house for soils with a perc rate of 60 minutes per inch. Care will have to be taken to maintain the reqnimd 100 foot setback from surface water and to not let the house footprint encroach on the area needed for the septic system and its future replacements. Please feel free to give me a call if you have any questions on this report. Sincerely, Ted Moore, P.E. TEST HOLE LEGAL D~ESCRIPTION: DATE PERFORMED: PERFORMED FOR: DEPTH (feet) 1 FLATTOF) TECHNICAL SERVICES 14530 ECHO ST, ANCHORAGE, ALASKA 99516 SOILS LOG -- F)ERCOLATION TEST Portion ef NW 1/4, SE 1/4, Section 23, T12N, R3W, S.M. Au u.g~_6, 1997 Ho~qan Smelker Pt. SM Reddish sandyloarn SP/SM Brown, somewhat silty, gravelly sand Interspersed with lenses of ML SLOPE[ 10% 0% 25% .................... SITE PLAN T.H, / 67 CORRAL FENCE ML/SM Gray gravelly silt Large boulder Depth to Groundwater Date No 9reundwater 8/6/97 Monitortubed_ry __ 8113197 uJJ 5% 5% ~) 25 % .....~---~---~.10% 10% 14 15- 16- 17 18 19 20- SM Gravelly sil~ sand Dense, sidewalls cio not smear Clock Net Time Percometer Net Drop Date Reading Time (minutes) Reading (inches) 8/6 12" Presoak 27 3/8 -- Add water and start 3:24 23 3/8 Add water 3:29:20 23 3/8 #2 3:34:20 5 21 13/16 1 9/16 ~_Add water 3:34:40 23 1/2 __ I #3 3:39:40 5 21 15/16 1 9/16 PERCOLATION RATE 4 (minutes/Inch) PERC HOLE DIAMETER 7" TEST RUN BE'DWEEN 6.5 FT AND 7.0 FT COMMENTS: Test hole dug near high R_oint of knoll. PERFORMED BY FLA~q'OP TECHNICAL SERVICES. I ,"~..~.~ '~,~,-C_. CERTIFYTHAT THIS TEST WAS FERFORMED IN ACCORDANCE WITH ALL STATE AND MUNICIPAL GUIDELINES IN EFFECT ON THIS DATE. DATE: ~' / / 5/ / ~) ~ TEST HOLE LEGAL DESCRIPTION: DA'rE PERFORMED: _ PERFORMED FOR: DEPTH (feet) 4 5 6- 7 8- 9 10- COMMENTS: FLATTOP TECHNICAL SERVICES 14530 ECHO ST. ANCHORAGE, ALASKA 99516 SOILS LOG -- PERCOLATION TEST Portion of NW 1/4, SE 1/4, Sectbn 23, T12N, R3W, S.M. August 6, 1997 Hagan Smelker Pt. SM Reddish sandy loam ML/SM Gray gravelly slit SM Dense gray gravelly silty sand Many cobbles and boulders Easier digging below 7' Variable composition of stratum SLOPE 10% 0% 25% T.JI. / 67 __ . ' ~ ~.. I I FENCE SM Silty sand Depth to Groundwater Date No groundwater 8/6/97 -Monitor tube dry 8/13/97 u~ 5% 5% 0% Sidewalls smooth Fairly easy digging IDate / Reading ~[ 12" ~k 18/7 ~k PERCOLATION RATE TEST RUN BETWEEN Clock Net Time Percometer Net Drop Time (minutes) Reading (inches) 27 3/8 12:50 1:53 33 30 27 3/8 23 15/16 23 3/8 22 7/8 23 11116 9/16 1/2 -~:25 30 23 1/8 9/16 60 (minutes/inch) PFRC HOt. E DIAMETER 7.5 FTAND 8.0 FT The material encountered in the bench excavated for the perc test was ailtJer than that encountered in the main test hole, so the per? test results should be conservativel~presentative of the entire stratum between 4 feet and 17.3 feet below ground level. PERFORMED BY FLA~FOPTECHN[CALSERVICES. I .~,~' ~///~ __ CERTIFYTHATTHISTESTWASPERFORMEDiN ACCORDANCE WITH ALL STATE AND MUNICIPAL GUIDELINES IN EFFECT ON THIS DATE. DATE: ~'/'/'~//¢ _~ .J DT1002653 '31V~IXOWddV 3~¥ NMOH9 8NOI/VOO1 lq¥ 'l~qd G]A]A~]8 VION 81 ~IH& :3$ON Z66 !~ '.LSNDfl¥ !~3i AB NAAYMC] 'i4 00!, = HONI !. '~'S 'M~ 'N~!,l '£~ '.LO:IS '~/I,=19 "I'/I~N NOI..LMOcl 9I ¢66 V~SVgV '3OV}IOHDNV i;]331S OHOH S~OIA~I3S qVDINHD3J, (IO,LLVgJ 0 ~ .LOq HNVJ. 01/d39 3NI~ ±0~ M3N 9'IB/V~ OBSOdOS8 9991H S991H ~4~dVP~BgBi MWVRBq3/ ~ ±09 S/09 0/9 S9-11H N;WV~BqBi '~ 109