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Home My WebLink AboutSILVERWOOD HILL ESTATE Lots 1-4A S-10753Silver'wood Hill Estate Lots 4A #5-10753 20441 PTARMIGAN BLVD. EAGLE RIVER, AK 9957%8736 (907) 696-6111/FAX (907) 696-8111 July3,2001 James Cross, PE Program Manager, Municipality of Anchorage Development Services Department On-Site Water & Wastewater Program P.O. Box 196650 Anchorage, AK 99519-6650 RE: S-10753 Silverwood Hill S/D -- DSD COMMENTS Dear Jim: We are submitting the requested information for the above referenced property for your review and approval. Attached is the topographic information, proposed septic reserve areas with corresponding soils logs and water availability data of properties in the immediate vicinity. DSD well data shows the average yield for the surrounding area to be approximately 2.08 GPM, with a range from 0.5 GPM to 4 GPM. The property generally slopes towards the west and south at approximate grades of 15 to 30%. Although the property in general is steep, sufficient area exist to support original and replacement wastewater disposal systems that meet all criteria specified in AMC 15.65. We respectfully request approval and plat signoff of the above referenced plat. If you have any questions, please contact me at 696-6111/FAX 696-8111. Respectfully submitted, KND Engineering Attachments: Cc: Neff Nichols file As noted ~D ENGINEERING 20441 PTARMIGAN BLVD. EAGLE RIVER, AK 99577-8736 CE 7116 SOILS PERCOLATION TEST Performed for: Neil Nichols Date Performed: 6/15/01 Project: Silverwood Hills Lot 1 TEST HOLE # 2001-01 3- 4- 5- 6- 7- 8- 9- 10- 11- 12- 13- 14- 15- 16- 17- 18- 19- 20- Depth (Feet) Org/ML-black/red overburden w/organics, moist GMdGP -med dense, gray sandy silty gravel w/cobbles to 1' B.O.H.-Bedrock HOLE PRESOAKED PRIOR TO TEST SEE ATTACHED SITE PLAN FOR HOLE LOCATION Was Ground water encountered? NO What depth? NA Depth to water after monitoring? NO Date? 6/22/01 Reading Date Gross Net Depth to Net Time Time Water Drop 1 6/15/01 1:00 6' 2 1:10 10min 3 10/16' 26/16" 3 * 1:11 6' 4 1:21 10min 3 14/16" 22/16" 5 * 1:22 6' 6 1:32 10 min 3 14/16" 2 2/16" 7 * 1:33 6' 8 1:43 10 min 3 15/16" 2 1/16 9 * 1:44 6" 10 1:54 10 min 3 15/16" 2 1/16 11 * 1:55 6' 12 2:05 10 min 3 14/16" 2 2/16" · Water Added Percolation Rate 4.71 (min/in) Perc Hole Diameter 6" Test Run Between 2 feet and 3 feet I, Kenneth M. Duffus, certify that this test was performed in accordance with all State and Municipal guidelines in effect on this date. ~D ENGINEERING 20441 PTARMIGAN BLVD. EAGLE RIVER, AK 99577-8736 Performed for: SOILS PERCOLATION TEST Neil Nichols Date Performed: CE 7116 Project: Silverwood Hills Lot 2 TEST HOLE # 2001-02 3- 4- 5- 6- 7- 8- 9- 10- 11- 12- 13- 14- 15- 16- 17- 18- 19- 20- Depth (~eeO Org/ML-black/red overburden w/organics, moist GMfGP -med dense, gray sandy silty gravel w/cobbles to 1' B.O.H.-Bedrock HOLE PRESOAKED PRIOR TO TEST SEE ATTACHED SITE PLAN FOR HOLE LOCATION was Ground water encountered? NO What depth? NA Depth to water after monitoring? NO Date? 6/22/01 Reading Date Gross Net Depth to Net Time Time Water Drop 1 6/13/01 1:00 7" 2 1:10 10 min 4 3/16' 2 13/16" 3 * 1:11 7" 4 1:21 10min 45/16' 211/16" 5 * 1:22 7" 6 1:32 10 min 4 7/16' 2 9/16' 7 * 1:33 7" 8 1:43 10 min 4 7/16" 2 9/16 9 * 1:44 7" 10 1:54 10 min 4 8/16" 2 8/16 11 * 1:55 7" 12 2:05 10 min 4 7/16" 2 9/16" · Water Added Percolation Rate 3.90 (rain/in) Perc Hole Diameter 6" Test Run Between 3 feet and 4 feet I, Kenneth M. Duffus, certify tlxat this test was performed in accordance with all State and Municipal guidelines in effect on this date. ~D ENGINEERING 20441 PTARMIGAN BLVD. EAGLE RIVER, AK 99577-8736 SOILS PERCOLATION TEST CE 7116 Performed for: Neil Nichols Date Performed: 9/26/00 Project:. Silverwood Hills Lot 3 TEST HOLE # 2000-03 2- 3- 4- 5- 6- 7- 8- 9- 10- 11- 12- 13- 14- 15- 16- 18- 19- 20- Depth (~eet) Org/ML-red/brown overburden w/organics, moist GMJGP -med dense, gray sandy silty gravel w/cobbles to 8" 'B.O.H. - Bedrock HOLE PRESOAKED PRIOR TO TEST SEE ATTACHED SITE PLAN FOR HOLE LOCATION Was Ground water encountered? NO Depth to water after monitoring? NO What depth? NA Date? 6/13/01 Reading Date Gross Net Depth to Net Time Time Water Drop I 6/18/01 1:00 7" 2 1:10 10 rain 3 9/16' 3 7/16' 3 * 1:11 7" 4 1:21 10 min 4" 3- 5 * 1:22 7" 6 1:32 10 min 4 2/16" 2 14/16" 7 * 1:33 7" 8 1:43 10 min 4 3/16" 2 13/16 9 * 1:44 7" 10 1:54 10 min 4 4/16" 2 12/16 11 * 1:55 7' 12 2:05 10 rain 4 4/16" 2 12/16" · Water Added Percolation Rate 3.64 (min/in) Perc Hole Diameter 6" Test Run Between 2 feet and 3 feet I, Kenneth M. Duffus, certify that this test was performed in accordance with all State and Municipal guidelines in effect on tlxis date. ~%~D ENGINEERING 20441 PTARMIGAN BLVD. EAGLE RIVER, AK 99577-8736 CE 7116 SOILS PERCOLATION TEST Performed for: Neil Nichols Date Performed: 6/13/01 Project:. Silverwood Hills Lot 4 TEST HOLE # 2001-04 Depth (FeeO 3- 4- 5- 6- 7- 8- 9- 10- 11- 12- 13- 14- 15- 16- 17- 18- 20- Org/ML-red/brown overburden w/organics, moist GM/GP - med dense, gray sandy silty gravel w/cobbles ~o 8" B.O.H. - Bedrock HOLE PRESOAKED PRIOR TO TEST SEE ATTACHED SITE PLAN FOR HOLE LOCATION Was Ground water encountered? NO What depth? NA Depth to water after monitoring? NO Date? 6/22/01 Reading Date Gross Net Depth to Net Time Time Water Drop 1 6/13/01 1:00 7" 2 1:10 10 min 4 6/16" 2 10/16" 3 * 1:11 7" 4 1:21 10 min 4 8/16" 2 8/16" 5 * 1:22 7' 6 1:32 10min 410/16" 2 6/16' 7 * 1:33 7' 8 1:43 10 min 4 12/16" 2 4/16 9 * 1:44 7' 10 1:54 10 rain 4 12/16" 2 4/16 11 * 1:55 7" 12 2:05 10 min 4 12/16" 2 4/16" · Water Added Percolation Rate 4.44 (min/in) Perc Hole Diameter. 6' Test Run Between 2 feet and 3 feet I, Kenneth M. Duffus, certify that this test was performed in accordance with all State and Municipal guidelines in effect on this date. Preliminary Plat L~v~od Rill Subdivision (T14N R1W See. 6 SE4 I~W4 & W2 SW4 NE4 land is required lo be ~e! aside for schools, parks elc, poi*lion of the developmen! ~s in a flood plai~ Sca~e: 1 i~ch = 200 feet 20 foot road surface coa'~r EAGLE RIVER VICINITY R-2M T ~ j[ ~. Case L~io~ PLI R-8 . ~m~ ~t F~ Umi~ RESERVE AREA DETAILS BRALY HOMESTEAD LOTS 1,2,3,4 LB, L` 3 LFIT ~ LBT 4 OF ~ NEIL NICHOLS ,~ ~~ s*~,.* m~Eo: KMD 20441 PTARMIGAN BLVD. ~sstO~ ~,LT: OAm 7/5/0~ EAGLE RIVER, AK 99577-8736 A~,L~: 00060.DWG ~.o,: 00060 (907~696-6111~FAX (907}696-8111 18895 Timberline Drive Well Depth: 400 feet Flow rote: 0.5 gpm No Hydrofracfion per- formed. Utilize 500 gal. holding tank for h~gh demand. 18946 Timberline Drive Weli Depth: 400 feet Flow rate: 4.0 gpm Hydrofracfion done when well drilled 1997 19411 Timberline Drive Well Depth: 340 feet Flow rate: 2.5 gpm No hydmfraction done ~.%mbertine Ofive 19336 Timberline Drive Well Depth: 340 feet Flow rate: 1.3 gpm No hydrofraction done Page 2 of 2 Com arative Well Data Affix northern edge of page two to southern edge of page one Scale: I Inch = 200 feet Sllve~wood Hill Estates Subdivision Case $- 10753 June 6. 2001 Pa~e 9 Soils testing, percolation testing and ground water monitoring must be conducted to confirm the suitability of each proposed lot for development using on-site wastewater disposal systems. Ground water monitoring must be conducted during high ground water season in either the fall (October) or spring (April- May). 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, c. Topographical information must be submitted. Supporting documentation on water availability must be provided. Case $-10753 ~d WU£~:~$ $00E 88 'NRf : 'ON ~NOHa : WO~ RESERVE AREA DETAILS BRALY HOMESTEAD LOTS 1,2,3,4 4 LOT 1 NBTE, SEPTIC ~ESE~VE ABEAS A~E LBCATE~ BN LOT AREAS ~ITH SLOPES OF 25% OR LESS. 19336 TIMBERLINE DRIVE ScGte: NTS 'i EAOLE RIVER, AK, 99577 *~'~': "*~: 8/3/01 EAGLE RIVER, AK 99577-8736 *~[:O0060.DWG ~.o.: 00060 (907}696-6111/FAX (907)696-811t Municipality of Anchorage Development Services Department Building Safety Division MEMORANDUM DATE: 05/14/01 TO: Jerry T. Weaver, Jr., Platting Officer, CPD FROM: ~,~es Cross, PE, Program Manager, On-Site Water & Wastewater SUBJECT.~ Comments on Cases due May 18, 2001 The On-Site Water & Wastewater Program has reviewed the following cases and has these comments: S - 10517 Eklutna Heights Subdivision - with vacation of R-O-W. Did not receive. S - 10681 Frislie Subdivision (with vacations). Did not receive. S - 10712 Ship Creek Crossing Subdivision (with variances). Did not receive. S - 10753 Silverwood Hill Estate Subdivision (with variances). 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. Soils testing, percolation testing and ground water monitoring must be conducted to confirm the suitability of each proposed lot for development using on-site wastewater disposal systems. Ground water monitoring must be conducted during high ground 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. MUNICIPALITY OF ANCHORAGE COMMUNITY PLANNING AND DEVELOPMENT P.O. Box 196650 Anchorage, Alaska 99519-6650 PRELIMINARY PLAT APPLICATION A. Please fill in the information requested below. Print one letter or number per block. OFFICE USE REC'D BY: 1. Tax Identification No. 2. Street Address 3. NEW abbreviated legal description (T12N R2W SEC 2 LOT 45 OR SHORT SUB BLK 3 LOTS 34). 4. EXISTING abbreviated legal description (T12N R2W SEC 2 LOT 45 OR SHORT SUB BLK 3 LOTS 34) full legal on back page. 5. Petitioner's Name (Last - First)' Address 1~3~ --/-';/~::~-/"-~*~ ~)~ City Eo,~./~- Phone# ~,~ - 07 07 Zip FAX# 7. Petition Area Acreage 6. Petitioner's Representative Address City State Phone # Zip FAX # 8. Proposed 9. Existing Number Lots Number Lots 10. Grid Number 11. Zone 12. FeeS. 13. Community Council Date: /~ /'~Xr- ~ / 20-003 (Rev, 6/00)* Front 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, lalso 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. Signature' / r/ *Agents must p~ovide written proof 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 Comprehensive Plan -- Land Use Intensity Special Study Dwelling Units per Acre ~// Alpine/Slope Affected Environmental Factors (if any): a. Wetland 1. "C" $, "A" 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 Case Number Case Number Case Number Case Number Building/Land Use Permit For Army Corp of Engineers Permit Legal description for advertising. T +4/ F. Checklist 42 Copies of Plat (Long Plat) .32 Copies of Plat (Short Plat) Reduced Copy of Plat (8 1/~ x 11 ) Certificate to Plat Aerial Photo Housing Stock Map Zoning Map Water: Sewer: 20-003 Back (Rev. 6/00) * 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 Applicant: Address: Phone Number: ® Municipality of Anchorage PLATTING BOARD AUTHORITY APPLICATION FOR VARIANCE 0707 Present/Future Use of Property ~/O.C..c~' /~/F'-E~/'t:~C~/~/"~/ ~ (/~-~'j Tax Identification Number: O~5~-O - 7t~n ~- ~O.~ -- O O(~ / ~ This is a request for a vadance from Section .~1, ~00 OlO This variance is for: Pr;v'~J~( C:LCC¢~ ~ .~O;~'?de~ A. The existing situation is: B. The granting of this petition would permit: .-f Before a variance may be granted, the applicant must prove that each of the following four conditions have been fulfilled. Answer each of the conditions in detail, using additional sheets if necessary. The undersigned alleges that: 1. There are such special cimumstances or conditions affecting said property that the strict application of the provisions of this ordinance would clearly be impractical, unreasonable, or undesirable to the general public; These special circumstances or conditions are: T~e ~mnfin~ ~I the ~e~ ~e~ wrl~n~ w~ll n~t be ~etnmen~l t~ the ~ubhc w~l~re ~nju~u~ to o~er Wo~e~ in the ~ma ~n w~ch sa~ ~ro~e~ i~ ~tu~te~ f~r the reasons: P 31;c Page 2 ® Municipality of Anchorage PLA'FI'lNG BOARD AUTHORITY APPLICATION FOR VARIANCE 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: Undue hardship would result from the stdct compliance with specific provisions or requirements of the subdivision regulations. The applicant may supplement the form with supporting information: Signature of Authorized Agent Address Sig~ ~{'~ re o:~ L~a n~ Ow n e r "~ Address