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HomeMy WebLinkAboutINLET VUE ESTATES LT 5Onsite File •t t 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 Permit Number: OSP161318 Tax Code Number: 05102112000 Work Type: WellSeptic Initial Permit Effective Dates: October 25, 2016 to October 25, 2017 Design Engineer: ANDERSON ENGINEERING Subdivision: T16N R1W SEC 32 Site Legal Address: T16N R1W SEC 32 LT 6 & 7 PTN G:1657 Owner/Address: EKLUTNA INC n part 111C111 I -17-1 fp L( - ( 14ell-1(ICP 16515 CENTERFIELD DRIVE #100 EAGLE RIVER AK 995777719 Site Mailing Address: 21371 CONLEY AVE, Chugiak Lot Size in Sq Ft: 747490 Total Bedrooms: y - lzmc 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. 12�7�6 co -Z07 Gt1e-1( /ocai7bn arc( 5erft, 4c.'4 y.7 c%a�eo� Received By: Issued By:7� (R (Q1Vt M 1 Date: 1011.2'11�1 Community Development Department Phone: 907-343-7904 Development Services Division Fax:,907r343-7.997 On -Site Water & Wastewater Program /yl 1�o t 1 ON-SITE SEWER/WELL PERMIT APPLICATION' j OCT 2 4 2016 1, 051-021-12 Parcel I.D. s Property owner(s) Troy Davis Homes Day phone 3310 2501' 1689 S. Knik Goose Ba Mailing address y Road #400 Wasilla, AK 99654 Site address 21371 Conley Avenue Chugiak, AK 99567 Legal description (Sub'd., Block & Lot) Legal description (Township, Range & Section) Lot 6, T16N R1 W Section 32 Lot Size 747,490 Sq. Ft. Number of Bedrooms Five -(5)_ Fput (y) -QC_ APPLICATION IS FOR: APPLICATION IS AN: TYPE OF DWELLING: IN all that apply) Absorption Field Q Initial � Single Family (SF) Q (w/wo AD U) Septic Tank El Upgrade ❑ Duplex (D) ❑ Holding Tank ❑ Renewal ❑ Multiple Dwellings ❑ Privy ❑ (SF and/or D) Private Well FI 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. y L E a, ,, , (Signature of property owner or authorized agent) PermiURush Fees: �254- C Waiver Fees: _ Date of Payment: 10 rr��/1 �151 it o Date of Payment: Receipt Number: o-IOVReceipt Number: Permit No. OSP I 120 IS' 0 Waiver No. Permit App_9-1-12.doc c©-91 November 20. 2016 Municipality of Anchorage Development Services Department On -Site Water and Wastewater Program 4700 South Bragaw Street Anchorage, AK 99519-6650 Subject: Lot 6, T1 6N R1 W Section 32 Proposed Lot 5, Inlet View Subdivision Septic System Design and Permit Application Impacts to Adjacent Properties Dear Onsite Services Engineer: Lot 6, T16N R1W Section 22 is currently being subdivided into 7 new lots. The owner of the parcel intends to construct a new four-bedroom home on proposed Lot 5. The remainder of the tract is currently vacant. We are therefore requesting a permit be issued for the construction of a new 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 septic system along with the alternate site. Also identified on the plans are the existing wells in the area and septic systems on surrounding lots. No conflicts exist between the proposed septic system and well or the proposed septic systems and wells on adjacent lots. Drainage arrows and ground 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 trenches and alternate site indicate well graded to poorly graded gravel (GP/GW). The percolation rate of the soil was determined to be 1 to 5 minutes per inch. No groundwater was found during the placement of the test holes but has recently been noted at 13.5' below the surface. The design depth of the groundwater is 12.5' as we are now 1 month past the typical high water level. An application rate of 1.2 gallons per day per square foot was used in the design of the absorption system. We are proposing to place a new 1,250 -gallon septic tank and a 58' long by 5' wide by 3' effective depth absorption trench to treat and dispose of the effluent generated in the house. The elevation of the distribution line in the absorption trench will be 5.5' below the surface and the total depth will be 8.5'. 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. We are requesting the trench distribution line be entered at the north end instead of the middle as the additional depth required by entering in the middle will result in the trench encroaching into the 4' separation Lot 6, T16N R1 W Section 32 November 20, 2016 Page Two distance from groundwater. We are confident no adverse impact will result rom entering the trench at the end due to the porosity of the underlying soils and the difference of only 8' in the length of the trench from the code mandated 50'. The ground surface on the lot in the area of the septic system is flat with only a very shallow shallow grade to the south. The north and south end of the proposed trench are at the same original ground elevation. The new trench will be constructed in conformance with Municipal 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: 1. 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. 2. 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. 3. 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. 4. 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, A4,E (,,-L, Michael E. Anderson, P.E. Attachments :.MAL .E....A.N..D..E.R.SO.N 77 S n No. CE—asst ? <. -------------- ---- 24- 24- ,26-- ,26-- CONTOUR CONTOUR INTERVAL - 2' LEGEND SV - Septic Vent CO - Clean Out MT - Monitor Tube TH - Test Hole E3 1 \ LOT 6, SECTION 32,, 16N9 R1 W, S.M., ALASKA PROPOSED LOT 5 INLET VIEW SUBDIVISION I 1 Proposed ' Well TH9 - - - - /Four Bedroom - - \ /Four ---` I � i C \ 1 I I CO Alt. 60 0) \ \ \ 1,250 Gallon \ Septic Tank i 1 \ 58' Long x 5' Wide x 3' Effective Depth Absorption Trench -------------- NOTE: No Conflicts with Wells or Septic Systems on Neighboring Lots. All Proposed Lots are Currently Vacant. N 90'00'00"W 'C, :. yS P 49th CONLEY AVENUE SITE PLAN SCIF 1" = 50' IAEL E. ANDERSON LOT 61 T1 6N R1 W SECTION 32 C 4 I PROPOSED LOT 5, INLET VIEW SUBDIVISION DESIGN FACTORS: Four Bedroom Home Perc. Rate: 1 - 5 Min./Inch Application Rate: 1.2 GPD/SF SYSTEM REQUIREMENTS: 5' Wide Trench System 1,250 Gallon Septic Tank 3' Drainfield Rock 4 Bedroom4 X 150 GPD/1.2 GPD/SF (A lication Rate) = 500 SF Absorption Area 500 SF/5 SF/LF*.58 (Red. Factor) = 58 LF Trench Length THEREFORE: Construct a 58' Long x 5' Wide x 4' Effective Depth Aborption Trench at the Location Shown. Flow Line Elevation in Trench to be 5.5' Below Original Ground Surface. Total Depth to be 8.5' Below Existing Ground. Provide Sof Cover Over Trench and 4' Over Tank or Provide 2" of Insulation and 2' of Cover. Maintain 10' Separation From Water Services in the Area. TYPI Natural Backfill 5'0" Geotextile Fabric 6" 4" Perforated PVC (Holes Down) 3'0" 5' Drainfield Rock DEEP TRENCH SECTION (NO SCALE) ���P� .... ""••`� NOTE: Grade Area Over Trench to Drain Away. Minimum 6' Separation From Bedrock. i „49th ff Minimum 4' Separation From Groundwater. 0 u Minimum 100' Separation From Private Wells in the Area. :"".;"'Niichaei...b;ndersc Minimum 100' Separation From Surface Water or Streams.. I� Minimum 10' Separation From Water Service Line. No. CE4381 -I -flf ••e' 3 MUNICIPALITY OF ANCHORAGE DEVELOPMENT SERVICES DEPARTMENT 4700 BRAGAW STREET ANCHORAGE, AK 99519-6650 SOILS LOG - PERCOLATION TEST LEGAL DESCRIPTION: LOT 5, INLET VIEW SUBDIVISION PERFORMED FOR: TROY DAVIs HOMES DATE: 3/9/16 PROJECT No.: PARCEL ID#: TECHNICIAN: L. BETTS DEPTII TEST HOLE 9 (feet) 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 a. d d. POORLY GRADED GRAVEL WITH SAND GP/GW COMMENTS: SLOPE SITE PLAN SEE SITE PLAN p t Y i WAS GROUND WATER ENCOUN'IFRHD4 No IF YES 0 WHAT DEPT Ii.1O 2% DEPTH OF WAT FR AFTER NIONHORING: NONE DATE 017 MONITORING: 10/15/16 p DATE READING GROSS TIME (MINUTES) NET TIME (MINUTES) DEPTH TO WATER (INCHES) NET DROP (INCHES) TEST HOLE PRESOAKED PRIOR TO TESTING: 3/9 1 11:17 1.00" 2 11:47 30 8.00" 7.00" 3 11:48 0.75" 4 12:18 30 7.81" 7.06" 5 12:20 1.001, 6 12:50 30 8.06" 7.06" PERCOLATION RATE:4.25(MIN/INCH) PERC. HOLE DIA. 611 (INCHES) TESTRUN 131 I'WEEN: 4.5 FT. and 5.5 FT. 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: 10/24/16 MUNICIPALITY OF ANCHORAGE DEVELOPMENT SERVICES DEPARTMENT 4700 BRAGAW STREET ANCHORAGE, AK 99519-6650 DEPTH (feet) I- 2 3 4 6 7 8 9 10- 11- 12- 13- 14- 15- 16- 17- 18- 19- SOILS 0-1I12- 13- 14- 15- 16- 17- 18- 19- SOILS LOG - PERCOLATION TEST LEGAL DESCRIPTION: LOT 5, INLET VIEW SUBDIVISION PERFORMED FOR: TROY DAvls HOMES DATE: 3/9/16 PROJECT No.: PARCEL ID#: TECHNICIAN: L. BETTS TEST HOLE 10 d O Q POORLY GRADED GRAVEL a WITH SAND GP/GW MICHAEL E. ANDERSON No. CE -1381 . SITE PLAN SEE SITE PLAN 8 WAS GROUND WATER ENCOUNTERED? NO IF YES @ WHAT DEPTH? DEPTH OF WATER AFTER MONITORING- X3.5 2% DATE OF MONITORING: 11/19/16 DATE READING GROSS TIME (MINUTES) NET TIME (MINUTES) DEPTH To WATER (INCHES) NET DROP (INCHES) TEST HOLE PRESOAKED PRIOR TO TESTING: 3/9 1 11:17 0.50" 2 11:47 30 9.75" 9.50" 3 11:48 0.63" 4 12:18 30 9.88" 9.25" 5 12:20 0.63" 6 12:50 30 9.88" 9.25" PERCOLATION RATE: 3.25 (MIN/INCH) PERC. HOLE DIA. 6" (INCHES) TEST RUN BETWEEN: 4.0 FT. and 5.0 FT. COMMENTS: TEST HOLE PRE SOAKED PRIOR TO TEST. TEST PERFORMED BY ANDERSON ENGINEERING. 1, MICHAEL E. ANDERSON CERTIFY THAT THIS WAS PERFORMED IN ACCORDANCE WITH ALL STATE AND MUNICIPLE GUIDELINES IN EFFECT ON THIS DATE: 12/5/2016