The URL can be used to link to this page

Home My WebLink AboutS-10397MUNICIPALITY OF ANCHORAGE Department of Health and Human Services P.O. Box 196650 Anchorage, Alaska 99519-6650 Date: January 20, 1999 To: . 7caning & Platting, CeD ~__/.vyames Cross, P.E., Program Manager, On-Site Water Quality From: Subject:~1' RequeSt for Comments on Subdivisions- January 21, 1999 The Environmental Services Division, On-Site Services Program, has reviewed the following cases and has these comments: S-10396: Bluebell Subdivision Information to satisfy the requirements specified by AMC 21.15 and AMC 15.65 must be submitted for each lot of this proposed subdivision. This information must include, but may not necessarily be limited to: 1. Soils testing, percolation testing and ground water monitoring must be conducted 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. 4. Supporting documentation on water availability must be provided. S-10397: Ashland Subdivision Information to satisfy the requirements specified by AMC 21.15 and AMC 15.65 must be submitted for each lot of this proposed subdivision. This information must include, but may not necessarily be limited to: 1. Soils testing, percolation testing and ground water monitoring must be conducted 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. 4. Supporting documentation on water availability must be provided. S-10398: Campbell Park Acres #2 Subdivision No objections. 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. Print one letter or number per block. 1. Vacation Code 2. Tax Identification No. 3. Street Address 4. NEW abbreviated legal description (T12N R2W SEC 2 LOT 45 OR SHORT SUB BLK 3 LOTS 34). 5. EXISTING abbreviated legal description (T12N R2W SEC 2 LOT 45 OR SHORT SUB BLK 3 LOTS 34) full legal on back page. 6. Petitioner's Name (Last - First) 7. Petitioner's Representative Address City ~r,/(..~+~, IL~(~~' State Phone# '~t~5'' ) ~ ~~''- Zip Address CityA,~ & H'6 ¢L/:~' (~'-~- State 8. Petition Area Acreage 9. )0 Proposed Number Lots 10. Existing 11. Grid Number 12. Zone Number Lots 13. Fee $ 14. Community Council 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 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 assigned hearing dates are tentative and may have to be postponed by Plannipg Staff, Platting Board, Planning Commission, or the Assembly due to administrative reasons. Signature *Agents must provide written proof of authorization. 20-003 Front (Rev, 4/95) * Please check or fill in the following: 1. Comprehensive Plan-- Land Use Classification I,/ Residential Commercial Parks/Open Space Transportation Related 2. Comprehensive Plan-- Land Use Intensity Special Study Marginal Land Commercial/Industrial Public Lands/Institutions Dwelling Units per Acre Alpine/Slope Affected Industrial Special Study Alpine/Slope Affected Environmental Factors (if any): a. W et la n d //"J/O,,~,-2t'~'~-~ 1. Developable 2. Conservation 3. Preservation Avalanche Floodplain Seismic Zone (Harding/Lawson) Please indicate below if any of these events have occurred in the last five years on the property. ~ Rezoning Case Number Subdivision Case Number Conditional Use Case Number Zoning Variance Case Number Enforcement Action For Building/Land Use Permit For Army Corp of Engineers Permit Legal description for advertising. F. Checklist 20-003 Back (Rev. 4/0S) ' 40 Copies of Plat (Long Plat) 30 Copies of Plat (Short Plat) Reduced Copy of Plat (8 1/2 x 11) Certificate to Plat Aerial Photo Housing Stock Map Zoning Map Water: Sewer: Private Wells Private Septic Fee Drainage Plan Topo Map 4 Copies Soils Report 4 Copies Pedestrian Walkways Landscaping Requirements Community Well Community Sys. Waiver Public Utility Public Utility $ ~ 0 ~ 9 7 JAN 2 5 1999 'ASHLAND SUBDIVISION TOPOGRAPHIC P LANTECH, INC. · SURVEYORS · PLANNERS · ENGINEERS 440 W. BENSON BLVD., SUITE 103 · ANCHORAGE, AK 99503 · (907) 562-5291 · FAX 561-6626 September 22, 1999 RECEIVED Municipality of Anchorage Department of Health and Human Services 825 "L" Street Anchorage, AK 99502-0260 SEP 22 1999 MunicIpality o~ ^~l(;norage Dept, Health & Human Servleea Subject: Ashland Subdivision - S10397 Septic System Reserve Areas Dear Jim: In January of this year more than 28 testholes were placed on Lots 1,2 and Tract A of proposed Ashland Subdivision to determine whether septic systems could be placed on the lots. The attached plan shows the location of the testholes and the septic system reserve areas for each lot. The proposed well locations are also shown. Percolation rates on the soils found in the testholes ranged from 2 to 8 minutes per inch with the vast majority under 5 minutes per inch. Unfortunately most of the testholes revealed bedrock at fairly shallow depths. The Municipal Ordinance allows for a septic system reserve area for each lot with the size dependant on the percolation rate or the establishment of three absorption systems for each lot. We were unable to find an area on Lot 1 of sufficient size to meet the ordinance requirement for septic system reserve areas. We have therefore established areas for three absorption beds on Lot 1. A total area of 5,000 square feet is highlighted. The standard size for an absorption bed with a bottomless filter is 12' wide x 30' long or 360 square feet. Several beds could be placed in the 5,000 square foot area. Testholes No. 21 and 22 are n or near this area. Bedrock was found at 10.5' beneath the surface in Testhole No. 21 and 5' below the surface in Testhole No. 22. Soils in both holes percolated at rates faster than 5 minutes per inch. Three testholes were found on Lot 2 which appeared workable. Testhole No. 23 revealed bedrock at 8'. Testhole No. 24 had bedrock at 9' and No. 25 at 8'. Soils in all holes percolated at faster than 5 minutes per inch. A 10,000 square foot area in the east section of the lot has been reserved for septic systems. Some grading may be necessary to reduce the ground slopes in the area of the final septic system site. It does appear, however, that all criteria can be met on each lot for construction of a septic system. Innovative type nitrate reducing systems will be required on these lots due to the shallow bedrock depth and the limited area available. Each bed will be 12' wide and 30' Ashland Subdivision September 21, 1999 Page 2 long to support either the bottomless sand filter system or the recirculating septic tank with upflow filter system. Standard gravity type systems are not acceptable for this property due to the size of the absorption bed required and the proximity of bedrock. A copy of the soils logs for the testholes developed on each lot are attached for your review. Please let me know if you have additional questions. Sincerely, Michael E. Anderson, P.E. Attachments $ 89'57'52" w '1 657.31' 5,000 Square 3 -12' X 30' Foot Area' For Absorption Beds. '-"-- ~ ~70~°o ~ ~ ~ ....... SCALE: 1 "= SEPTEMBER 9, 1999 LANO & CONSTRUCTION SURVEYORS-PLANNERS-ENGINEERS 4-40 EST BENSON BLVD. # I03 (fox) ,561-6626 ANCHORAGE, ALASKA 99505 (90.7) 562-5291 10,000 Square Foot Septic Reserve Area KENO HILLS SUB ADDITION ASHLAND SU TEST HOLE ILl I I I I I LOCATIONS Municipality of Anchorage. DEPARTMENT OF HEALTH & HUMAN SERVICES 825 'L" Street. Anchorage, Alaska 99502-0650 SOILS LOG -- PERCOLATION TEST PERFORMED FOR: LEGAL DESCRIPTION: John Berggren lot 1, Ashland Subdi¥ision SLOPE' ~0 11" 12 13- 14- 1 16 17 18 19 2O TESTHOLE NO. 22 WAS GROUND WATER ENCOUNTERED? S L I.F YES. AT WHAT .__..,~.," 0 DEPTH? p E Depm t0 Wae~ tater !I I I I. Date Gross · Net Depth to Net Reading I Time Time Water Drop PERCOLATION RATE "~ im,nutes~,nch) PERC HOLE DIAMETER ~:~ ~' TEST RUN BETWEEN __ FT AND __ FT COMMENTS 72-008 iRev. 4/&5~ PERFORMED FOR: Municipality of Anchorage. DEPARTMENT OF HEALTH & HUMAN SERVICES 825 "L" Street. Anchorage, Alaska 99502-0650 SOILS LOG -- PERCOLATION TEST John Berggren LEGAL DESCRIPTION: Lot 1, 10 11 12 13 14 15 16 17 18 19' 20 TESTHOLE COMMENTS Ashland Subdivision NO. I 1 SLOPE WAS GROUND WATER ~,~ ENCOUNTERED? ,, S IF YES. AT WHAT DEPTH? .__/~" 0 P E ~, · w~'/~e'/'/- '/~1 DATE PERFOR [ 72--008 (Rev. PERCOLATION RATE TEST RUN BETWEE~ ~ {mmutes,,nch) PERC HOLE DIAMETER ~ FT AN~' 3, 9w' .FT Reading Date Gross Net Depth to Net Time Time Water Drop .... ,.-- ~:~: %~ ~,7o ,~. ~ ~, o Municipality of Anchorage. DEPARTMENT OF HEALTH &' HUMAN SERVICES 825 "L" Street. Anchorage, Alaska 99502-0650 SOILS LOG -- PERCOLATION TEST PERFORMED FOR: John Berggren DATE PER FOR~' Lot LEGAL DESCRIPTION: ', 7 8 9 10- 1 1 - 12 13 14 15 Ashland TESTHOLE NO. Subdivision SLOPE 21 WAS GROUND WATER ENCOUNTERED? S L IF YES. AT WHAT 0 DEPTH? ~"~ ~ p E MoAitorinD? ~,~ it"~4~r Dam ~ II I Reading Date Gross Net Depth to Net Time Time Water Drop PERCOLATION RATE~' [m,nutes/,nCh) PERC HOLE DIAMETER TEST RUN BETWEEN ''''~ FT AND '''~/' FT COMMENTS PERFORMED BY: ACCORDANCE WITH ALL STATE AND MUNICIPAL GUIDELINES IN EFFECT ON THiS DATE. DATE: THA'[ THIS TEST WAS PERFORMED IN 72-008 ~Rev. 4n~%~ Municipality of Anchorage . DEPARTMENT OF HEALTH & HUMAN SERVICES 825 "L" Street. Anchorage, Alaska 99502-0650 SOILS LOG -- PERCOLATION TEST PERFORMED FOR: LEGAL DESCRIPTION: Lot 1, ~ ~o John Berggren Ashland Subdivision SLOPE 7-1 TESTHOLE NO. 18 9 10 11 12 13 14 15 16 17 18 19 20 I WAS GROUND WATER ENCOUNTERED~ S L IF YES. AT WHAT / 0 DEPTH? ~ p E Deptll lo WaterMoniIDrlnD? .iNStAnter i~r,,t,,) Reading Date Grow Net Depth to Net Time Time Water Dro'p PERCOLATION RATE '~ {mmuteS/,nch} PERC HOLE DIAMETER q J7 TEST RUN BETWEEN'' 1'''~ FT AND FT COMMENTS 72.-008 {Rev. 4/85) PERFORMED FOR: LEGAL DESCRIPTION: Municipality of Anchorage. DEPARTMENT OF HEALTH & HUMAN SERVICES 825 "L" Street. Anchorage. Alaska 99502-0650 SOILS LOG -- PERCOLATION TEST John Berggren Lot 2, Ashland Subdivision SEAL) t~ 1 4 5 6 7 8 9 10- 11- 12- 13- 14- 15- 16 I7 18- 19 2O COMMENTS ~"~:f~" ~-¢~, ~/-~r VV~ / / ~ TESTHOLE NO. SLOPE 23 WAS GROUND WATER ENCOUNTERED? SITE PLAIN_ S L IF YES. AT WHAT DEPTH? ~ O P E MOAqoring? Reading Oa~e Gross Net Depth to Net Time 'lqme Water Drop, PERCOLATION RATE TEST RUN BETWEEN / ~ (m,nutes/,nch) PERC HOLE DIAMETER - - FTAND~'~'~- FT ] ER'TIFY T T TEST WAS PERFORMED IN . 72-008 (Rev. 4/85) PERFORMED FOR: LEGAL DESCRIPTION: Municipality of Anchorage. DEPARTMENT OF HEALTH & HUMAN SERVICES 825 "L" Street. Anchorage. Alaska 99502-0650 SOILS LOG -- PERCOLATION TEST John Berggren Lot 2, Ashland Subdivision .. DATE 1 9 10- 11- 12 13 14 15 16 17 18 '19 20 COMMENTS TESTHOLE NO. 24 SLOPE 1 WAS GROUND WATER ~,/ ENCOUNTER ED? ; S IF YES, AT WHAT / ~ DEPTH? ~"-~' p E Dep~hmWaterA~r _,~_¢-' Da~F,~//~ SITE PLA__N .? t I 1 Gross Net I De~th to Net Reacting Date Time TimeI Water Drop PERCOLATION RATE ~'' I (m,nules/~nch) PERC HOLE DIAMETER ~ FT AND ~ FT PERFORMEDBY:/.~--~~ '' " I ~~*~' ~~RTIFY.THAT~,THIS. TEST. WAS ACCORDANCE WITH ALL STATE AND MUNICIPAL GUIDELINES IN EFFECT ON THIS DATE. DATE: (~/~-i~'/~,~ PERFORMED IN 72-008, (Rev. 4/85) PERFORMED FOR: LEGAL DESCRIPTION: Municipality o! Anchorage. DEPARTMENT OF HEALTH & HUMAN SERVICES 825 "L" Street. Anchorage, Alaska 99502-0650 SOILS LOG -- PERCOLATION TEST John Berggren Lot'2, Ashland Subdivision · 1 2 3 7 8 I0 12 13 14 15- 17 18 2O COMMENTS TESTHOLE NO. 25 SLOPE WAS GROUND WATER ENCOUNTERED? IF YES. AT WHAT DEPTH? ~ITE .PLAN I Gross Net I Oe13th to Net Reading 'Date Time Time Water Drol3 PERCOLATION RATE TEST RUN BETWEEN __ (m,nutes,,,nch) PERC HOLE DIAMETER __ FTAND ~- FT ACCORDANCE WITH ALL STATE AND MUNICIPAL GUIDELINES IN EFFECT ON THIS DATE. DATE; 72-008 (Rev. 4/85) THAT THIS TEST WAS PERFORMED IN MEMORANDUM DATE: TO: FROM: SUBJECT: September 29, 1999 Jim Cross, P.E. Mike Anderson, P.F.{}/~ Ashland Subdivision, S-10397 Septic System Reserve Sites Attached is the plat for Ashland Subdivision which shows the three locations proposed for the 12' X 30' absorption bed sites for the bottomless sand filter type septic systems. In addition, the reserve area and backup soil tests are enclosed for Tract A of the subdivision. It is my understanding Tract A will eventually be resubdivided to be served by City water and sewer. Sufficient surface area is available, however, for a 12,000 square foot reserve area to meet the Municipal Ordinance for subdivisions with septic systems. SEP-09-1999 THU 09:24 AM LANTEOH/SLANA S 89'57'52" w or 5,000 Square 3 -12' X 30' AbsorPtion` Beds. Plat For Exact Locations FAX NO. 5616626 P, 01 657.31' SEPTEMBER 9, 1999 LANO & CONSTRUCTION SURVEYORS-PLANNERS-ENGINEERS 440 WEST BEN$ON BLVD. # 103 (~ax) 561-6626 ANCHORAGE, ALASKA 99505 (907) 562-5291 Received Time'gep. 9.' 8'21AM \10,000 Square Septic Reserve Foot KENO HILLS AE)OITION N ASHLAND TEST HOEE LOCATIONS Municipality o! Anchorage. DEPARTMENT OF HEALTH & HUMAN SERVICES 825 "L" Street. Anchorage. Alaska 99502-0650 SOILS LOG -- PERCOLATION TEST PERFORMED FOR: John Berggren DATE pERFO} , Tract 'A' Ashland Subdivision p~/~;. SLOPE ~N 4 5 6 ! WAS GROUND WATER 10 - RI , ENCOUNTERED? 11 s L IF YES. AT WHAT ~,.-. O / O DEPTH? p 12 E Ii I i 13 Monitoring? N° Dale: Reading DaTe Gross Net Depth to Time Time Water 14 15 17 20- PERCOLATION RATE ~ (mmnuteS,'mch) PERC HOLE DIAMETER TEST RUN BETWEEN ~ FTAND __,FT 72-008 (Rev. 4/85) Municipality of Anchorage. DEPARTMENT OF HEALTH & HUMAN SERVICES 825 "L" Street. Anchorage. Alaska 99502-0650 SOILS LOG -- PERCOLATION TEST PERFORMED FoR: John Berggren DATE PER FORI Tract 'A', Ashland Subdivision SLOPE WAS GROUND WATER ENCOUNTERED? S L IF YES. AT WHAT DEPTH? --..---~-0 ~'~ 0 P E Depth to Water 14 15 16- 17- 18- 19- 20 Reading Date Gross Net Depth to Net Time Time Water Drop f ~ 72-008 (Rev. 4/85) PERFORMED FOR: L. EGA L DESCRIPTION: 2~ 6 -- 7 8 9 10 11- 12- 13 14 15 16 17 18 19 20 COMMENT. S John Municipality of Anchorage. DEPARTMENT OF HEALTH & HUMAN SERVICES 825 "L" Street. Anchorage. Alaska 99502-0650 SOILS LOG -- PERCOLATION TEST Berggren Tract 'A'; AShland Subdivision SLOPE WAS GROUND WATER ENCOUNTERED? S L IF YES. AT WHAT DEPTH? ~ C) f O P E Depth to Waer A~er .-,...,7 DATE PERFORMED: I ! I I Gross Net Depth to Net Reading Date Time Time Water Drop PERCOLATION RATE TEST RUN ~ (m,nutes/mch) PERC HOLE DIAMETER pERFoRMED BY:~.~~'~ l.~ ACCORDANCE WITH ALL STATE AND MUNICIPAL GUIDELINES IN EFFECT ON THIS DATE. DATE: 72-008 (Rev. 4/85; Municipality of Anchorage _ DEPARTMENT OF HEALTH & HUMAN SERVICES 825 "L" Street. Anchorage, ALaska 99502-0650 SOILS LOG -- PERCOLATION TEST PERFORMED-FOR: John Berggren DATE PERF~ LEGAL DESCRIPTION:' Tract 'A', Ashland Subdivision 12 13- SLOPE WAS GROUND WATER ENCOUNTERED? S L IF YES. AT WHAT O DEPTH? p E Depm lo Waler After Monitoring7 14- 15- 16- 17- 18 19 2O '' I ! Date Gross Net I Depth to Net Reading Time TimeI Water Drop i ,.../ ~ (mmute$/mCh.~ PERC HOLE DIAMETER PERCOLATION RATE TEST RUN BETWEEN FT AND FT 72-008 (Rev, 4/85) PERFORMED FOR: LEGAL DESCRIPTION: 1 2 4 5 6 7 8 9 10 12 13 15- 16 17 18 19 20 COMMENTS /~¢/ John Municipality o! Anchorage. DEPARTMENT OF HEALTH & HUMAN SERVICES 825 "L" Street, Anchorage, Alaska 99502-0650 SOILS LOG -- PERCOLATION TEST Berggren Tract 'A' , Ashland Subdivision WAS GROUND WATER ENCOUNTERED? IF YES. ATWHAT DEPTH? ~ SLOPE Depm to Water ~er Monitoring7 , I , Reading Date Gross Net J Depth to Net Time Time Water Drop I~;o~;'° Il, ~ I~, f~ ~ ~ PERCOLATION RATE ~ (m,nutes;,nch,~ PERC HOLE DIAMETER '4 ACCORDANCE WITH ALL STATE AND MUNICIPAL GUIDELINES IN EFFECT ON THIS DATE. DATE: ?/Z.~? 72-008 (Rev. 4/85) WAS PERFORMED IN October 1, 1999 Municipality of Anchorage Department of Health and Human Services 825 "L" Street Anchorage, AK 99502-0260 Attention: Jim Cross, P.E. Subject: Ashland Subdivision, S10397 Water Availability Study Dear Jim: We recently completed a study of the lots surrounding the proposed Ashland Subdivision to determine the depths and production rates of the wells and the overall water availability and quality. The results of the study vary and indicate the wells are between 38' and 170' deep. The depth of the wells appears to correlate with the depth of the bedrock. Water production from the wells was found to average between 2.5 and 20 gallons per minute. Recent studies of the nitrate content in the drinking water in the Keno Hills Subdivision near this property indicate concentrations less than 1 milligram per liter. This amount is well below the acceptable imit of 10 milligrams per liter. Based on the aforementioned information we conclude the wells to be placed on Lots 1 and 2 of Ashland Subdivision will be less than 150' below the surface and should produce between 2.5 and 5 gallons of water per minute depending on the depth of the well and level of development. The quality of the water should meet or exceed current drinking water standards. The estimated depth of the wells is based on the correlation seen between the depth of the bedrock and the depth of the wells in the Keno Hills Subdivision. Backup information concerning the wells in the area is included for your review. Please let me know if you have any questions. Sincerely, Michael E. Anderson, P.E. Attachments Well Owner. Location (address of: Township, Range, Sectfo'~, 'If known; or instance mare roau WELL Depth in feet from ground surface 1,'.). 5 17':) RACTOR GREATER ANCHORAGE EA BOROUGH Department of Envir( nn{ental.;.qual 3330 "c" Street, : .-27 ,y 4. 5. 6. ~ ;~i ' ~" .... ~ .... a ~" Approval requested b',': First National ank of Anchor g- ; , ,~ 9510"~,'~ ' t:~: Phone:,.; 279 Allyson 'GaZlagher :'%?r/? Phon~ , ~ Property Owner: '~homas P ~& ~ ,,~ Y,,;S~:;I¢;>~':~ ';";:' Mailing Address: 5ta[ Rout~ A BoX 475G~ Legal Description: I,ot ~ Block 2.'Keno H~llS'~:t Location: Type of facility tt> t:e inspected Well Data: I nd i vidv~al A. lype C. Construction Sewage Disposal System: A. Installed 7~1,-74 Bacter. f al. Analysf s ~ On'site syst~ - B. Inst C. Septic Tank: 1. Size D. SeeFage Pit: 1. Absorption Area. E. Disposal Field: Total length of lines! 8, Distances: J:,',~ ' A. Well to: Septic tank '~ ~, Nearest lot line "- , B. Foundation to sentic tank C. Absoeption area to nearest lot tQ-03,1 (1 I:'?,) -~ ".L ~ ' ,~,..,' ~. ~.~., ...... , :' . ~f,. .,.r ~ ,, ,,~,~ I~.~OUTINI Will ...... - __., _-- ,~' Size o! casing .... Off] __Depth o! Hole_ Screen ( ); Perforated ( ). { D, s" ibc screc 1 or perforation .~.~.~ ~,, ,.~.~..,~,~,,_ ..,L · ' ' ' /~ -allons -er (hour) '}{ml~tek~~y~- bout'with":~'' 'L~ .: Z_ ~ ' l)t'pH~ in ~eet lrom ~L~:":~;~';'~s~"~:'4/'~:~"~';"~m;''~'~''`; ; "'~ '~'~' ground surface Give delnils of formadona penetrated, ,lz~ of malerlah color ina narane*a