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Home My WebLink AboutRAPTORS KNOLL LT 3Raptors Knolls Lot 3 #017-101-60 Permit Number: OSP161163 Tax Code Number: 01710160000 Work Type: WellSeptic Permit Effective Dates: June 21, 2016 On-Site Water & Wastewater System Permit MUNICIPALITY OF ANCHORAGE Development Services Department On-Site Water & Wastewater Program 4700 Elmore Road, PO Box 196650 Anchorage, AK 99519-6650 Telephone: (907) 343-7904 Initial to June 21, 2017 Design Engineer: ANDERSON ENGINEERING Subdivision: RAPTORS KNOLL Site LegalAddress: RAPTORS KNOLL LT 3 G:3037 Owner/Address: WINFREE MICHAEL ALEX & PAULA JEAN 3504 VASSAR DR ANCHORAGE AK 995080000 mrtment Site Mailing Address: 14093 RAPTORS KNOLL CIR, Anchorage Lot Size in Sq Ft: 54066 Total Bedrooms: 5 This permit is for the construction of: Y Disposal Field Y Septic Tank N Holding Tank N Privy Y Private Well N Water Storage All construction must be in accordance with: 1. The attached approved design. 2. All requirements specified in Anchorage Municipal code Chapters 15.55 and 15.65 and the State of Alaska Wastewater Disposal Regulations (18AAC72) and Drinking Water Regulations (18AAC80). 3. The wastewater code requires inspections during the installation. The engineer must notify the Development Services Department at least 2 hours prior to each inspection. Provide notification by calling (907) 343-7904 (24 hours). 4. From October 15 to April 15, a subsurface soil absorption system under construction during freezing weather must either: A. Open and Close on the same day. B. Covered, sealed, and heated to prevent freezing. MUNICIPALITY OF ANCHORAGE Community Development Department Development Services Division On-Si~ Water & Wastewater Program Phone: 907-343-7904 Fax: 907-343-7997 tjS¢~ O PERMIT APPLICATION~ UBMITTA ~SlTE SEWER/VVEL~ I,/ JUN ! ? ~016~ ~' ParcolI.D.017-101--6' __ i RUSH! Property owner(s) Harding Homes of Alaska, Inc. ~ay phone 350-1860 Mailing address 5771 Heritage Heights Drive Anchorage, AK 99516 Site address 14070 Raptors Knoll Circle Anchorage, AK 99516 Legal description (Sub'd., Block & Lot) Raptors Knoll, Lot 3 Legal description (Township, Range & Section) Lot Size 54,075 .Sq. Ft. Number of Bedrooms Five (5) APPLICATION IS FOR: APPLICATION IS AN: TYPE OF DWELLING: ([~ all that apply) Absorption Field [] Initial [] Single Family (SF) [] (w/wo ADU) Septic Tank [] Upgrade [] Duplex (D) [] Holding Tank [] Renewal [] Multiple Dwellings [] Privy [] (SF and/or D) Private Well [] Water Storage [] THIS APPLICATION INCLUDES A VARIANCE / WAIVER REQUEST FOR: Distance: I certify that the above information is correct. I further certify that this is in accordance with applicable Municipal Codes. (Signature of property owner or authorized agent) Permit/Rush Fees: Date of Payment: Receipt Number: Permit No. Waiver Fees: Date of Payment: Receipt Number: Waiver No. Permit App_9-1-12.doc ANDERSON ENGINEERING J p,O, BOX 240773 ~NCHORAGE; AK 99524 5227773 ~77,7766 (FAX) June 16,2016 Municipality of Anchorage Development Services Department On-Site Water and Wastewater Program 4700 South Bragaw Street Anchorage. AK 99519-6650 Subject: Lot 3. Raptors Knoll Subdivision Septic System Design and Permit Application Impacts to Adjacent Properties Dear Onsite Services Engineer: The owner of Lot 5. Raptors Knoll Subdivision intends to construct a five bedroom home on the lot. We are therefore requesting a permit be issued for the construction of the well and septic system to accommodate the home. The attached Site Plan and backup documentation identify the location and configuration of the proposed well and the proposed septic system along with the alternate site. Also identified on the plans are the existing wells on the lots surrounding this lot. No conflicts exist between the proposed septic system and well or septic systems and wells on adjacent lots. Drainage arrows and slope surface contours are shown on the site plan showing the grade and direction of flow on the lot. The drainage pattern will not be changed as a result of this project. The test holes placed on the lot in the area of the absorption trench and alternate site indicated silty gravel with sand (GM). The percolation rate of the soil was determined to be 6 to 15 minutes per inch. No groundwater was found during the placement of the test holes and none developed during the monitoring period. An application rate of .8 gallons per day per square foot was used in the design of the absorption system. We are proposing to place a new 1.500-gallon septic tank with an absorption trench 60' long x 3' wide x 8' effective depth. The elevation of the distribution line in the absorption trench will be 3' below the surface and the total depth will be 11'. A minimum of 3' of fill or 2" of insulation and 2' of fill will be placed over the absorption trench and 4' over the septic tank. The ground surface on the lot in the area of the septic system is neady flat with slight slopes to the southwest at a shallow grade. The new trench will be constructed parallel to the contours of the slope as much as possible in conformance with Municipal Lot 3, Raptors Knoll June 16, 2016 Page Two requirements. The new septic system will be constructed a minimum of 100' from all wells and any surface water and 10' the proposed and existing water services in the area. If the system is constructed in accordance with our design the following statements apply: The system, if constructed as designed, will have no adverse impact on the wells in the area or those to be constructed in the future. The system, if constructed as designed, will have no adverse impact on existing septic systems in the area or those to be constructed in the future. The system, if constructed as designed, will have no adverse impact on reserve space, either surface or subsurface, on any lots located in the area. The system, if constructed as designed, will have no adverse impact on drainage patterns in the area. The current drainage pattern will be maintained. Sincerely, Michael E. Anderson, P.E. Attachments ........ ~o' u~ ~. __~_ ............ - ......... / t ~ I o I < I EAST 142ND AVENUE LOT 3, RAPTORS KNOLL SUBDIVISION DESIGN FACTORS: SYSTEM REQUIREMENTS: Five Bedroom Home Deep Trench System Perc. Rate: 6-15 Min./Inch 1.500 Gallon Septic Tank Application Rate: .8 GPD/SF 8' Drainfield Rock 5 Bedrooms X 150 GPD/.8 GPD/SF (Application Rate) = 937.5 SF Absorption Area 937.5 SF/16 SF/LF = 58.59 LF Trench Length THEREFORE: Construct a 60' Long x 3' Wide x 8' Effective Depth Absorption Trench atthe Location Shown. Flow Line Elevation in Trench to be 3' Below Original Ground Surface. Total Depth to be 11' Below Existing Ground. Provide 4' Cover Over Septic Tank and 3' Cover Over Absorption Trench. Maintain 100' Separation from Wells in the Area. Natural Backfill Geotextile -- Fabdc 4" Perforated PVC (Holes Down) Drainfield Rock TYPICAL DEEP TRENCH SECTION NOTE Grade Area Over Trench to Dra~n Away . ~ . Minimum 6' Separation F~m Bedrock. ~....~;.~.~h......~.. M n mum 4' Separation From Groundwater ~ ~'~"~"'~' ~"~]~"~ ....... , ~ . , - ~..;.....~.....,~ i~lnl~u~ 1uu ~epa~tlon From Wells In the Area. ~ MIONAELE. ANDER~N Minimum 100'Separation From Sudace Water or Streams. ~:~,~ No. 4700 DEPTH (~¢0 1 2-- 3-- 4-- 5-- 6-- 7-- 8 9 11 MUNICIPALITY OF ANCHORAGE DEVELOPMENT SERVICES DEPARTMENT BRAGAW STREET ANCHORAGE, AK 99519-6650 SOILS LOG - PERCOLATION TEST LOT 3, RAPTORS KNOLL SUBDIVISION LEGAL DESCRIPTION: PERFORMED FOR: DATE: 6/7/16 PARCEL ID#: HARDING HOMES. INC. PROJECT No.: TECHNICIAN: TEST HOLE A ] OB/OG SILTY GRAVEL WITH SAND WAS GROUND WATER ENCOUNTERED? IF YES ~ WHAT DEPTH9 DEPTH OF WATER AFTER MONITORING: W. ROBERTS SLOPE NO DATE OF MONITORING: 6/16/16 BOH @ 18' SITE PLAN SEE SITE PLAN TEST HOLE PRESOAKED PRIOR TO TESTING: 6/7 1 5:14 2.13" 2 5:44 30 5.38" 3.25" 3 5:45 2.25" 4 6:15 30 5.50" 3.25" I 5 6:16 2.00" ' I6 6:4630 5.25",3.25" PERCOLATION RATE: 9.2 0VliNflNCH) PERC. HOLE DIA. 6" _¢NCHES) TEST RUN BETWEEN: 4.5 FT. and 5.5 FT. COMMENTS: TEST HOLE PRE SOAKED PRIOR TO TEST. TEST PERFORMED BY ANDERSON ENGINEERING. I, MICHAEL E. ANDERSON CERTIFY THAT THIS WAS PERFORMED IN ACCORDANCE WITH ALL STATE AND MUNICIPLE GUIDELINES IN EFFECT ON THIS DATE. 6/16/16 Municipality of Anchorage Development Services Department BuiJding Safety Division On-Site Water and Wastewater Program 4700 Eimore Road P.O. Box 196650 Anchorage, AK 99507 www.ci, anchor aqe.a k.us (907) 343-7904 Soils Log - Percolation Test Performed For: Ray Hi~kel LegaJ Description: Timber Trail Subdivision, Lot 3 Slope I Date Performed: Feb 8, Township, Range, Section: Site Plan WAS GROUND WATER ENCOUNTERED? F YES, AT WHAT DEPTH? L Depth to Water After O Monitoring? 0 ~J I~ E 4- 5- 6- 7- 8- 9- 10- 11- 12- 13- 14- 15- 16- 17- 18- Reading Date Gross Time Net Time Depth to Water Net Drop PERCOLATION RATE ,.~ (minu~es/inch) PERC HOLE DIAMETER TESTRUNBETWEEN ~,~ FT AND ~.~" FT COMMENTS Perc Cavity was presoaked PERFORMED BY: A. Harala [ CERTIFY THAT THiS TEST WAS PERFORMED IN ACCORDANCE WITH ALL STATE AND MUNiCiPAL GUIDELINES iN EFFECT ON THIS DATE. DATE: Municipality of Anchorage ~,~....F,.b~'~ ..S~..~,~,}. H Development Services Department · On-Sire Water4700 E{moreand WastewaterRoad Program / Soils Log - Percolation Test , ,, Pe~ormed For: mckel Date Pe~ormed: Feb 8, 201~ Legal Oesori~iJon2 Timber TmiJ SubdMsion, Lot 3 Township, Range, Sec[bn: Slope S{te Pman WAS GROUNDWATER ENCOUNTERED? F YES, AT WHAT DEPTH? Depth to Water After Monitoring? J~J~ ~' Reading Date Gross Time Net Time Depth to Water Net Drop PERCOLATION RATE I I (minutes/inch) PERC HOLE DIAMETER TEST RUN BETWEEN +~'FT AND ~1~"'~ 0 PT COMMENTS Perc Cavity was presoaked PERFORMED BY: A. Harala [ CERTIFY THAT THIS TEST WAS PERFORMED IN ACCORDANCE WITH ALL STATE AND MUNICIPAL. GUIDELINES IN EFFECT ON THIS DATE. DATE: