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Home My WebLink AboutHORIZON ESTATES LT 10Horizon Estates Lot 10 #051 - 324 - 30 Permit Number: Tax Code Number: Work Type: On-Site Water & Wastewater System Permit OSP141300 05132430000 WellSeptic 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 Permit Effective Dates: August 29, 2014 to August 29, 2015 Design Engineer: ANDERSON ENGINEERING Subdivision: HORIZON ESTATES Site LegalAddress: HORIZON ESTATES LT 10 G:0553 Owner/Address: TROY DAVIS HOMES lNG 165 E PARKS HIGHWAY STE 200 WASILLA AK 996540000 ~artment Site Mailing Address: 18280 FISH HATCHERY RD, Eagle River Lot Size in Sq Ft: 40070 Total Bedrooms: 3 This perm it 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 f_re_~g,~,.~,~.~ ....... Special Previsions: The entire subsurface disposal field and/or alternate is not within a 30 foot radius of a percolation test. The Engineer needs to do an additional percolation test prior to the construction of the septic field. Please submit stamped and signed results with the As-built Inspection Report. If the results require a design change, construction of the system will stop pending On-Site review and approval. AMC 15.65.060.B.3 MUNICIPALITY OF ANCHORAGE Community Development Department Development Services Division On-Site Water & Wastewater Program ON-SITE SEWER/WELL PERMIT APPLICATION Parcel I.D. 051-324-30 Phone: 907-343-7904 Fax: 907-343-7997 SUBM!TTAI AUG 042_014 ' Gretchen Stuller Property owner(s) Troy Davis Homes Day phone 310-2501 Mailing address 165 E. Parks Highway #200 Wasilla, AK 99654 Site address Fish Hatchery Road Eagle River, AK 99577 Legal description (Sub'd., Block & Lot) Horizon Estates, Lot 10 Legal description (Township, Range & Section) Lot Size 40,070 Sq. Ft. Number of Bedrooms Three APPLICATION IS FOR: APPLICATION IS AN: TYPE OF DWELLING: ([~ all that apply) Absorption Field [] Initial [] Single Family (SF) [] (w/wo ADD) 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_£- :.: £.Cc ~' ANDERSON ENGINEERING P.O. BOX 240773 ANCHORAGE, AK 99524 522;7773 677-7766 (FAX) August 4, 2014 Municipality of Anchorage Development Services Department On-Site Water and Wastewater Program 4700 South Bragaw Street Anchorage, AK 99519-6650 Subject: Lot 10, Horizon Estates Subdivision Septic System Design and Permit Application Impacts to Adjacent Properties Dear Onsite Services Engineer: The owner of Lot 10, Horizon Estates Subdivision intends to construct a new three- bedroom home on the lot. We are 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 proposed and existing wells in the area and septic systems on surrounding lots. No conflicts exist between the proposed septic system and the well or septic systems and wells on adjacent lots. Drainage arrows and ground 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. Storm drain easements are in place on the east and west sides of the lot. No surface water is currently seen in the easements and no evidence of past drainage was noted. The test holes placed on the lot indicated silty gravel with sand (GM). The percolation rate of the soil was determined to be 16 to 30 minutes per inch. No groundwater was found during the placement of the test holes, but groundwater was found during the monitoring period at 14.8' in Test Hole No. 20. An application rate of .6 gallons per day per square foot was used in the design of the absorption system. We are proposing to place a new 1,000-gallon septic tank and a 58' long by 3' wide by 7' 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 3' below the surface and the total depth will be 10'. 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 slopes to the north and northwest at a shallow grade with some cross sloping from the east. The new trenches will be constructed parallel with the contours of the slope as much as possible 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 Lot 10, Horizon Estates August 4, 2014 Page Two 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 ~mpact 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 tocated 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 · .- 49th GoYERNlgElqT LOT 6, TRACTS A, B, AND C NO CONFLICTS Well I0 '16,000 Square Septic Reserve Area 130 sq.ft LOT 10, HORIZON ESTATES SUBDIVISION 40,070 :~F TRACT B 450 ® Well 9 Well AREA NAP SCALE 1' = 100' LEGEND ~3 Te st I Well L Conto )le Designation and LocaUon cation with 100' Protective Radlu~ Interval - 2' NO CONFLICTS -/ ~ '~'hq)' / ~%,' SUBDIVISION , ~ ~ , ~Bedroom ~ / V Home LEGEND ~ g FCO- FoundoUon Cleon Out ] ~~ptn TH - Test Hole ~ / ' / // CO -- Cleon Out ~ / ~ FSV - Flow Splitter Valve ~ / ~ ~ / / /~ > ~ No Areos of / / / / ~ ~ Excessive Slope or /~ ~ / ~ I A ~ Within 100' of Any / ~- ~ / t ~ ~ PoA of the New w / ~ ~ / /~ Septic System. · '""V~i~g~L"~' ~;~;~;~"}'~ ~~ .. j~. SCALE 1 40 LOT 10, HORIZON ESTATES SUBDIVISION DESIGN FACTORS: SYSTEM REQUIREMENTS: Three ~edro~rn H~rn~ ...... '~e-~l:;~re~ch System Perc. Rate: '16-30 Min./Inch 1,000 Gallon Septic Tank Application Rate: .6 GPD/SF 7' Drainfield Rock 3 Bedrooms X 150 GPD/.6 GPD/SF (Application Rate) = 750 SF Absorption Area 750 SF/14 SF/LF = 53.57 LF Trench Length THEREFORE: Construct a 58' Long x 3' Wide x 7' Effective Depth Absorption Trench at the Location Shown. Flow Line Elevation in the Trench to be 3' Below Original Ground. Total Depth to Be 10' Below Existing Ground. Provide 4' of Cover Over Septic Tank and a Minimum of 3' Cover Over Absorpiton Trenches. Maintain 100' Separation from Wells in the Area. Natural Backfill Geotextile Fabric (~)__ 4" Perforated PVC (Holes Down) Drainfield Rock TYPICAL DEEP TRENCH SECTION /NO SCALE~ NOTE: Grade Area Over Trench to Drain Away. Minimum 6 Separation From Bedrock. a,:.~.~....,.,~,,,,,l...,~.,,~,A....~ Minimum 4' Separation From Groundwater. Minimum 100' Separation From Wells in the Area. ~SP~o~.s'~ . . . M~mmum 100 Separation From Sudace Water or Streams: &700 MUNICIPALITY OF ANCHORAGE DEVELOPMENT SERVICES DEPARTMENT BRAGAW STREET ANCHORAGE, AK 99519-6650 LEGAL DESCRIPTION: PERFORMED FOR: DATE: I0/I 1/13 PARCEL ID#: DEPTH (feet) OB/OG 1 2 3 SILTY GRAVEL WITH SAND 4 OH 5 6 7 8 9-- 20- SOILS LOG - PERCOLATION TEST LOT lO, HORIZON SUBDIVISION BOH @ 16' TROY DAVIS HOMES PROIECT No.: TECHNICIAN: WAS GROUND WATER ENCOUNTERED? A. HARALA SLOPE YES SITE PLAN SEE SITE PLAN DEPTH TO DATE READING GROSS TIHE NET TildE WATER NET DROP (HINUTES) (PIlNUTES) (INCHES) (INCHES) TEST HOLE PRESOAKED PRIOR TO TESTING: 10/12 1 14:29 5.69" 2 14:59 30 7.06" 1.25" 3 15:00 5.75" 4 15:30 30 6.94" 1.19" 5 15:31 5.69" 6 16:01 30 6.88" 1.19" PERCOLATION RATE:24 (MIN/INCH) PERC. HOLE DIA. 6" _(INCHES) 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: 10120113 �E • Municipality of Anchorage ` zE a On -Site Water and Wastewater Program (907) 343-7904 S q F E T Y CERTIFICATE OF ON-SITE SYSTEMS APPROVAL Parcel I.D. 051-324-30 1. GENERAL INFORMATION Complete legal description Horizon Estates, Lot 10 Expiration Date: (O ( R ^Z d2 Location (site address) 18280 Fish Hatchery Road, Eagle River, AK 99577 Current Property owner(s) Peter & Esther Bostick Day phone Mailing address Real Estate Agent 18280 Fish Hatchery Road, Eagle River, AK 99577 2. TYPE OF DWELLING: ® Single Family (w/wo ADU) ❑ Duplex ❑ Multiple Dwellings (Single Family and/or Duplex) 3. NUMBER OF BEDROOMS: 4. TYPE OF WATER SUPPLY: Individual Well Individual Water Storage ❑ Community Class Well ❑ Public Water System ❑ Waiver/Variance request for: Received by: 3 Day phone TYPE OF WASTEWATER DISPOSAL: Individual Holding Tank ❑ Community ❑ Public Sewer ❑ COSA to be released to the engineer, unless otherwise requested by the engineer. COSA Fee $ 550 Date of Payment : ; 1 % - 2 1 Receipt Number CQ -4 I % 6, COSA # Y 5C 2-11113 Date: Waiver Fee $ Date of Payment Receipt Number Waiver # istance: 5. STATEMENT OF INSPECTION BY ENGINEER C As certified by my seal affixed hereto and as of the validation date shown below, I verify that my investigation, based on procedures outlined in the Certificate of On -Site Systems Approval Guidelines for this application, shows that the on-site water supply and/or wastewater disposal system is (are) safe, functional and adequate for the number of bedrooms and type of structure indicated herein. 1 further verify that based on the information obtained from the Municipality of Anchorage files and from my investigation and inspection, the on-site water supply and/or wastewater disposal system is(are) in compliance with all applicable Municipal and State codes, ordinances, and regulations in effect at the time of installation. Name of Firm _ARCTERRA_CONSULTING,-INC. Phone 696-6111 _---------- _. Address 20441 PTARMIGAN BLVD., EAGLE RIVER, -AK 99577 / Engineer's Printed Name KENNETH M. DUFFUS Date Engineer's Comments: This investigation was completed in compliance with ADEC and MOA regulations. The assessment of the condition of the well and septic applies only to the conditions as of the day tested. The flow and absorption rates may change due to subsurface conditions that may not be observed from the surface, changes inland use, local soil characteristics, groundwater levels that may fluctuate during the year and the water usage of the family being served by the system. The operational life of all well and septic systems are subject to these various and dynamic characteristics and are outside the control of the evaluator of the well and septic system. Therefore, ArcTerra can not give any estimate of how long a system will function satisfactory for current or futureNk occupants or can ArcTerra guarantee that no unseen i�; C)ia' encroachments, deficiencies or discrepancies exist. / k / "I o 7'r-1 DSD SIGNATURE System #1 Approved for � System #2 Approved for a � bedrooms. � ;1KELNIN rt N. G ' !S16 � / bedrooms. TSSI�.Arl Disapproved.\s+-� �llllllt(t(ff//�� Conditional approval for bedrooms, with the f ila�i��` /7 - OW -SITE g m WATER ANp WASTE- v TATER z Jc` PROGFAM— JJ 0 J , B w. Original Certificate Date: 13 —1 01—Z-1 The Municipality of Anchorage Development Services Division (DSD) issues Certificates of On -Site Systems Approval (COSA) based only upon the representations given in paragraph 5 by an independent professional civil engineer registered in the State of Alaska. The Municipality of Anchorage is not responsible for errors or omissions in the professional engineer's work. 7. ATTACHMENTS: COSA Checklist Septic System Advisory Well Flow Advisory COSA blue sheet -1 0-10-12 doa X Nitrate Advisory Arsenic Advisory Other COSA Checklist Legal Description: Horizon Estates Lot 10 Parcel ID: If more than 1 septic system on lot: COSA Checklist # of Structure served by this system _ A. WELL DATA Well log is filed with Onsite (or attached) Date drilled 10/6/14 Total depth 125 ft Cased to 60 ft Sanitary seal is functioning correctly Wires are properly protected Casing height (above ground) 28 in. Date of flow test for COSA 3/9/21 Static water level at beginning of test 25 ft. B. TANK DATA Age of tank(s) 7 years Tank type/material Septic/Steel Measured operating fluid level in septic tank 49 Standpipes/foundation cleanout per record drawing Date of pumping 3/12/21 D. ABSORPTION FIELD DATA Which system tested (date installed) 8/30/14 ALL standpipes present per record drawing Total measured depth from grade 11.0 ft (max) Measured depth to pipe invert from grade 3.6 ft (min) ❑ N/A — pressurized field Monitor tubes go to bottom of effective. If not, state depth into effective Code -required soil cover over field ❑ System presoaked (Required if vacant for greater than 30 days prior to date of test) Gallons introduced gallons Comments/Deficiencies: COSA Checklist yellow sheet Well production at time of test 4.1 gpm Water storage tank volume gallons Well disinfected for coliform test? ❑ Yes ❑ No Coliform bacteria is Negative Nitrate mg/L 11 Nitrate less than MRL (ND) Arsenic 6.41 ug/L ❑ Arsenic less than MRL (ND) Collected by Areterra Consulting Date of Sample 3/8/21 STATION ❑ Requi aintenance completed Age of lift station years Lift station material Comments: Adequacy test date 3/9/21 Results Vd Pass For 3 bedrooms Fluid depth prior to test 4 in Water added 450 gal New depth 17 in Elapsed time 1200 min Final fluid depth 4 in Absorption rate 450+ gpd Any rejuvenation treatment (past 12 months) If yes, enter date E. SEPARATION DISTANCES From Private Well on Lot to: (Please enter distances if less than required or if community well) Septic Tank/Lift Station on Lot > 100' Yes if No Community Sewer Manhole/Cleanout > 100' ® Yes if No ft ® Yes if No Neighboring Tank > 100' 0 Yes if No ft Private Sewer/Septic Line > 25' ® Yes if No Absorption Field on Lot > 100' ® Yes if No ft Holding Tank > 100' ® Yes if No Neighboring Absorption Fields > 100' Surface Water > 100' Yes Animal Containment > 50' ® Yes if No ® Yes if No ft Manure/Animal Excreta Storage > 100' Community Sewer Main > 75' ® Yes if No ft ® Yes if No ft ft ft ft ft From Septic/Holding Tank on Lot to: (Please enter distances if less than required) Building Foundations > 10' ® Yes if No ft Surface Water > 100' ® Yes if No ft Property Line > 5' ® Yes if No ft Wells on Adjacent Lots: Absorption Field > 5' ® Yes if No ft Private Wells > 100' ® Yes if No ft Water Main > 10' ® Yes if No ft Community Wells > 200' ® Yes if No ft Water Service Line > 10' ® Yes if No ft If septic tank is under driveway comment below From Absorption Field on Lot to: (Please enter distances if less than required) Building Foundation > 10' Yes if No ft If absorption field is under driveway comment below Property Line > 10' ® Yes if No ft Wells on Adjacent Lots: Water Main > 10' ® Yes if No ft Private Wells > 100' ® Yes if No Water Service Line > 10' ® Yes if No ft Community Wells > 200' ® Yes if No Surface Water > 100' Yes if No ft F. ENGINEER'S COMMENTS G. ENGINEER'S CERTIFICATION I certify that I have determined through field inspections and review of Municipal records that the above systems are in conformance with MOA COSA guidelines in effect on this date. COSA Checklist yellow sheet ft ft