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Home My WebLink AboutBIRCH GROVE Lt 1 S11928Onsite File � Rooney P. Kinney Associates, inc. Consulting Engineers a Surveyors November 15, 2012 Municipality of Anchorage Onsite Water and Wastewater 4700 Elmore Road Anchorage, AK 99507 Attention: Deborah M. Wockenfuss Reference: Lot 1 Birch Grove Subdivision C I i a2� Dear Ms. Wockenfuss: 12 -CK -1660 Per your request, Rodney P. Kinney Associates, Inc. (RPKA) verified that the existing septic system meets the required separation to any foundation. The discussed shed shown on the surveyor's drawing has no foundation below ground, since it is built on cinder blocks and lumber placed on the ground surface. The house that was built after the septic system was built also meets the required separation distance. Its nearest corner is 11 feet away from the near edge of the 5 -wide trench, 13.5 feet from the line defined by the two cleanouts at the ends of the trench. A revised signed and sealed Plan View to scale is included with this letter. The revised plan view shows the following: • The reserved area meets required separations from property line, proposed well, existing well. • There are no other developments on the lot. • All slopes within 50 feet of the reserved area are approximately 10%. • The approximate locations of the existing house, well, and septic system relative to the reserved area. • There were no surface waters within 100 feet of the reserved area (or the subdivision line) at the time of the percolation test and upon revisiting the site on November 14, 2012. If you have any questions, please contact me at 694-2332. Sincerely, RODNEY P. KINNEY ASSOCIATES, INC. Greg Eberle, PE Project Engineer GAE:djm 16515 Centerlield Drive i Suite 101 s Eagle River, Alaska ! 99511 907.694.2332 0 Fax 907.694.1807 1 www.rpka.net Project �4t GLV-15-gh. Page of 2-- `&RPKA Job No. t 14 60. Ink2- S4& "'Fi % OL " l j Date� nevP, inney Associates, inc, TING ENGINEERS SURVEYORS Title: V1'5, -J By.K— L;.-L L i A 1 i vw� uu) A -L A-41 xc 11h, j-, 49, Fl . . ........ FF HERE Al 0. ROFES LOT j- p -L 1-14- J -,-j 1 1. j 1 i j. i 1 j it i� Ll 1, if Loll A J j J A I A II f J J-1 I i j J P0 ro a 5A.A— -LJ i — hA-1- r- 11 I -L J- A Iz C) —Fe it Lova1-& (0 JID 70 J + tA, YWVA.NL%ct 4t 1 so r 4ul N- (3-: 1 �� it J-1-1 &1l -7 1 l a-kL 1 2- C- I 4-vef 145 q� L- W-aAok, 0 ml,.O�—� 0"�L • Coal 1z q0, 6,l Me] L.. N �o �s o� sUd, 3 / LEGEND m .ry Isx i srmirsJv nwz i un o�a ,mavr aRu . sirsn•,sr R[Ruvnwznswe-uR. A RRCv s unnrN ew wmnR JPAe i rte+ � v ' is ON 'o ¢y K"Im O. v� l� O nL�- I _TTLCL 1]'LtH ilL(pNNR RES[RYA IMI 4 �Y AREA OEDICATEO TO ROW wrv+Rry SPRING STREET J�+ �N O O K / 1 00 5 SUNNY ww�i,v 'ain a wraw MLi 0 JI.vpIRl Rr�tLKc[stgim. 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A RRCv s unnrN ew wmnR JPAe i rte+ � v ' is ON 'o ¢y K"Im O. ww�i,v 'ain a wraw MLi 0 JI.vpIRl Rr�tLKc[stgim. SURVEYOR'S CERTIFICATE t RgMESSgNJ/.1AtO5l'gYEY00.4]MNC.T[WLT S,Hi :,I[P.ATOe 4AIRVC ILm [[11Nt7RlMf5C11T-VIOY dIILOS ATiIWLYSVR'fR0Ai0MRT1,EOfAA1tSSAI:IOCARIIGTARLS.Y�at t mRSCRI'Alll IiLLTAl R W SRMIii El l[RN R CSlItR0.lmltJ W tIL iEl L iM.R elmu4Nlcnoatta•Nns NMLinI sLSAw sT.RLawsTx¢[Mvtvzx 4ASSlliLl m SbMRYSGR A•.gISTIgfE IN[T Y.11 i[ SLIISSR4JIETI M SW SLSCTK®RA:MQ6NLlO1CONUStO1ESETM tIM,RRp1TSJOLLSRPr PLAT APPROVAL RlA7M'RMC.rOtt,kMVK RU11,16 J1CgN1T txT-OeTJ{. ,xL¢ A MUPo+RASOf 1F_AANOT SUtf➢fgM+CAO1.4 P11'[A 4,RSIAI1TIW l` p.r[RriRGm)xR.M:Auulri nss. ware ilAa e. rut,rertR[cmnmRacRtnaTuulmsulaot4tJamLr T " 1 a ACCEPTANCE OF OEDICATION 71!C NUGCPKOrt1ANO1¢gAG, N[FtLTK[E%f fON iLO1sCSSAN LCR CJLIK RlAamlt TN[AtAPR�1TSAt�U1tG311N1T R[AT MClOpin, PJINOI WLUOTOD[US[IQNIf•AVIi-¢I-Wr,RilCl� ROMIRYSTGi.YGW/A:LJJArAiRS41CYN LLtCMI m112ATAklMRAGr,A 9A tAS—_OAYOR—Wt A1'CST. nxtirKnuR Jw+m e.JeatRrt[ ML Municipality of Anchorage :°(ENGIN E,sEAL) ;°;� Development Services Department a -r 4. )IT P,'`A Building Safety Division • ° ° ° • • •} .s�• , ,°, , ,:� � On -Site Water and Wastewater Program 6' J4/��x� 4700 South Bragaw St. �'° ° •°• o : ° ° •r> P.O. Box 196650 Anchorage, AK 99519-6650 (t ��° ��,1L1: , AIN ted,.,,_• www.muni.org/onsite ii i') (907) 343-7904 ? ,> Performed For: Legal Description Soils Lo o Percolation Test �✓ l'� i� 't/�� Date Performed: Z_T Gmr, P Lot � y � E �� C''? V_c v e = Township, Range, Section: q r R ( it 5 Slope Site Olan ® Feet ooh \rVt P �o 2- 3- 4- 5- 6- 7- 8 - go -3 -5 -6- 7 -8 - go 10- 11- 12- 13- 14- 15- 16- 17- 18- 19- 20 - COMMENTS WAS GROUNDWATER ENCOUNTERED? ��%7 S ®t IF YES, AT WHAT DEPTH? , L� o Depth to Water After5&L _ � p P Monitoring? alL E Date: £ �� i' C Reading0t Date Gross Time Net Time Depth to Water Net Drop 07 lc) s r� t®°'s 6, �. PERCOLATION RATE (minutesAnch) PERC HOLE DIAMETER itit TEST RUN BETWEEN ° FT AND b FT e -�—, 4�✓— ® .6�, tT FD !2A— _. , L PERFORMED BY: Z r If I I CERTIFY THAT THIS TEST WAS PERFORMED IN ACCORDANC WITH ALLSTATE AND MUNICIPA GUIDELINES IN EFFECT ON THIS DATE. DATE: ZZ Z ® a9ilf • f7 I TLJ • ��' Water Availability Summary forGFcGO�?i'tMESERLE C`92'4 Subdivision of Lot I Birch Grove S®r�z. The proposed subdivision of Birch Grove Lot 1 into two lots, a north lot and a south lot, will not negatively impact surrounding water availability. The division line is shown in the attached drawing. The aquifer supplying the wells of the adjacent lots having developed utilities is adequate to also supply a subdivision south and down slope of the north half of Lot 1. There are 5 lots developed with on-site water and sewer services that lie adjacent to Lot 1. These are: (1) a 12 -acre lot to the northwest of Lot 1, (2) the 20 -acre Birch Grove Lot 2 just north, (3) Lot 19, (4) Lot 25, and (5) Lot 26, the three smaller lots of Sunny Valley Subdivision to the east. Well information about these lots from T14N, R1W is tabled below. Table 1 Using the MOA requirement of 150 gallons per day per bedroom and summing the bedrooms of all 6 designs (20 bedrooms), the aquifer requirement would be approximately 3000 gallons per day. Using the rounded down average well yield from the table of 27 gallons per minute, the aquifer recovery time would be 1.85 hours or nearly 2 hours. We conclude that the aquifer capacity is adequate to sustain the subdivision of Lot 1 Birch Grove. Approximate Location Static Water Casing Well Lot Legal Approximate Relative Well Log Level Depth Well Yield Depth Depth Number Description Size (acres) to Lot 1 (Yes/No) (feet) (GPM) (feet) (feet) 1 E2NE2NE4 12.6 northwes No 6 20 20 50 t Section 17 2 Lot 2 20 north Yes 45 20 85 86 Birch Grove 3 Lot 19 2 east Yes 61 25 152 153 Sunny Vally 4 Lot 25 3 east No 47 8.9 40 51 Sunny Vally 5 Lot 26 2 east Yes 16 40 80 80.5 Sunny Vally 6 Lot 1 48 same Yes 90 50 221 222 Birch Grove Using the MOA requirement of 150 gallons per day per bedroom and summing the bedrooms of all 6 designs (20 bedrooms), the aquifer requirement would be approximately 3000 gallons per day. Using the rounded down average well yield from the table of 27 gallons per minute, the aquifer recovery time would be 1.85 hours or nearly 2 hours. We conclude that the aquifer capacity is adequate to sustain the subdivision of Lot 1 Birch Grove.