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Home My WebLink AboutROBANNA Lots 1 & 2 S-8620 MUNICIPALITY OF ANCHORAGE DEPARTMENT OF HEALTH & ENVIRONMENTAL PROTECTION Environmental Health Division CASE REVIEW WORKSHEET CASE NUMBER: DATE RECEIVED: S-8620 March 26, 1987 SUBDIVISION OR PROJECT TITLE: Lots 1, 2 Robanna Subdivision with Vacation COMMENTS DUE BY: April 20, 1987 ) PUBLIC WATER AVAILABLE ( ) PUBLIC SEWER AVAILABLE ) COMMUNITY WATER AVAILABLE / / EAGLE RIVER ENGINEERING SERVICES Lou Butere, P.E. P.O. Box 773294 Eagle River, Alaska 99577 Telephone {907} 694-5195 May 11, 1987 Mr. Steve Morris Civil Engineer, On-site Services Municipality of Anchorage P.O. Box 196650 Anchorage, AK 99519 RE: Robanna Subdivision Health Approval MUNICIPALITY OF ANCHOP, AGI~ DEPT, OF HEALTH & ENVIRONMENTAL PROTECTION :MAI' 1 2 1987 RECEIVED Dear Mr. Morris: Attached, please find the results of our water monitoring of the 'test hole located on the above proposed subdivision. beyond the 5' filter. Our original measurement of water depth after a 7 day stabilization period was 8.58' below ground surface on February 25, 1987. The water table has been monitored at 8.2', 7.6' and 7.25' in the following months. We expect that at this time the readings are indicating the spring high water levels and will not rise drastically this level. It should be noted that a rise in water table to level would still allow a bed type septic system with sand I am recommending that any septic installation utilize a sand filter at a total depth of 4' rather then relying on the SM layer for filtration. I would expect that an additional text hole will be excavated at the site of the actual septic system location. The owner is attempting to build on this lot in June of 1987. If there are any questions or concerns, please feel free to call me at 694-5195. Sincerely, Leu Butera~ P.E. LB:bls attachment EAGLE RIV~'~ ENGINEERING SERVfCES INC. P. O. Box 773294 EAGLE RIVER, ALASKA 99577 Phone 694-5195 SHEET NO ~/ OF CALCULATED BY .~ ,, ~'~,~.,v~-~ DATE CHECKEO BY DATE SCALE '~'~'~ :~'PRELIMINARY PLAT APPLICATIC'--" OFFICE USE Municipality of Anchorage DEPARTMENT OF COMMUNITY PLANNING REC'D BY; P.O. BOX 6650 VERIFY OWN: Anchorage, Alaska 99502-0650 A. Please fill in the information requested below. Print one letter or number per block. Do not write in the shaded blocks. 0. Case Number (IF KNOWN) 1. Vacation Code New abbreviated legal description (T12N R2W SEC 2 LOT 45 OR SHORT SUB BLK 3 LOTS 34). IIII II I I:{ II t I I I1 tt I I I I I I~11 Existing abbreviated legal description (T12N R2W SEC 2 LOT 45 OR SHORT SUB BLK 3 LOT 34) full legal on back page. 4. Petitioner's Name (Last- First) 5. Petitioner's Representative MioiciLi'iNT00 K, Iw 'iLiL' ^!M! IIII III Address P.O. Box 772988 Address P.O. Box 671089 City Eagle River State AK City Chugiak State AK Phone No. 688-4086 Bill Me X Phone No. 688-4499 Bill Me __ 6. Petition Area 7. Proposed 8. Existing 9. Traffic 10. Grid Number 11. Zone Acreage Number Number Analysis Zone Lots Lots N 753, 12. Fee $ B. Date: ~ - '2.- ~, - ,~ 7 510 13. Community Council Bi rchw00d 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. I also 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 be have to postponed by Planning Staff, Platting Board, Planning Commission, or the Assembly due to administrative reasons. Signature X~.!l!~.n o!lqnd X~.!l!1.n o!lqnd · sX~ X~!unwwoo IlaAA Xl!unwwoo o!ldeS @~.l~A!Jd (uos~eg/bu!pJeH) euoz o!tus!as 'p U!eldpOOla eNOUele^V 'q XPnlS le!oads le!JlSnpul paloaHv adOlS/au!dlV palo@~l¥ @dolS/au!dlv a Joy Jad suun BU!lle~C] suo!InH~,SUl/Spue'q o!lqnd le!J~,snp u I/le!OJew uJ oo pue-] leU!OJe~ ~?' CATION OF RIGHT-OF-WAY OR~'~"/ OFFICE USE EASEMENT APPLICATION REC'D BY: Municipality ol Anchorage DEPARTMENT OF COMMUNITY PLANNING VERIFY OWN: P.O. BOX 6650 Anchorage, Alaska 99502-0650 A. Please fill in the information requested below. Print one letter or number per block. Do not write in the shaded blocks. 4. Petitioner's Name (Last- First) I I I:t ?!>1 0. Case Number (IF KNOWN) 1. Vacation Code 2. Abbreviated Description of Vacation {EAST 200 FEET SOME SIREET) ~. ~i~1i~ ~DDrevi~e~ le~l ~es~ri¢ion [TI~N ~ BEG R LOT 4~ O~ 8HO~T SUB BLK ~ LOT ~4~. 5. ~otitioner's Bopresontativo Address P.O. Box 772988 Address P.O. Box 671089 City Ea91e River State AK City Chuqiak State AK Phone No. 688-4086 Bill Me. X Phone No. 688-4499 Bill Me. 6. Petition Area Acreage 7. Proposed Number 8. Existing Number 9. Traffic Analysis Zone 10. Grid Number 11. Zone 12. Fees 100 13. Community Council Bi rchwood 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 vacate it in conformance with Chapter 21 of the Anchorage Municipal Code of Ordinances. I understand that payment of the basic vacation fee is nonrefundable and is to cover the costs associated with processing this application, that it does not assure approval of the vacation. I also 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, orthe Assembly dueto administrative reasons. Date: Signature *Aaents must Drovide written Proof or authorization. AWP, N o!lqnd 'sAS ,~,!unwwoo o!ldes elE~A!Jd X ,~,!I!~.N o!lqnd IIeAA ,~l!unwuJoo Slle/~ 9~E~A!Jd ---'-~-- 'N'S ':~saM g a6ue~j 'q~aON St d.Lqsut401 'c_;;~ uo.~oaS 'tS 3.ol ':~,A09 '6u!s!iJeApe ~ol uop, duosep leOaq '3 eqouele^¥ 'q pe~oe~lV adOlS/eU!dlV 8~0v Jsd sl!un 6U!lle~O Xpnis lU!oeds le!Jlsnpul Peloe,tl¥ edOlS/eu!dl¥ suo!ln],BSUl/Spue-I 3!lqnd le!Jlsn pu I/le!OJauJ woo pue-1 leU!§Je~ JUSTIFICATION FOR VACATION OF RIGHT-OF-WAY in ROBANNA SUBDIVISION The existing 50' roadway easement on the western portion of the lot is not needed. There is no connection for a road on the north in that the matching right-of-way to the north was vacated by plat 82-476. According to the topo map, this route is too steep to construct a road to municipal standards. All lots which abut this right-of-way are already subdivided down to the minimum lot size allowed for this zoning and primary access for each is already provided by existing constructed rights-of-way. The 50' roadway easement on the south should be vacated. It will be replaced by a 30' half-dedication of Carlisle Drive. The matching 30' half right-of-way was dedicated by plat 83-196. The 30' will also match that dedicated on the adjoining lot to the west (plat 83-144) and is the width normally required in the area. Carlisle Drive is a rural residential street and the total 60' right-of-way meets the municipal requirements for this street. U- ~3:.o AERIAL PHOTOGRAPHIC MaP WITH TOPOGRAPHY FO[{ RO:BA.N-NA S~BD~'V'LSION 1"=200' CONTOUR INTERVAL = 4' blUNICIPAUTY OF ANCHORAGE PHOTOGRAPHIC MAP OF EA~LE RIVER & VICINITY, GRID 28 EAGLE RIVER ENGINEERING SERVICES Lou Bntera P.E. P.O. Box 773294 Eagle River, Alaska 99577 Telephone (907) 694-5195 March 12, 1987 Mr. Steve Morris Civil Engineer, On-site Services Municipality of Anchorage P.O. Box 196650 Anchorage, AK 99519 REF: Proposed Subdivision: Lots 5lA and 5lB; TtSN,-q~W~, Sec. 25. Chugiak, Alaska Dear Mr. Morris: Attached please find a site plan and soil log data submitted for proposed subdivision approval. Our soil log with perc test is located on Lot 5lA as shown on the attached site plan. The soil on Lot 5lA has two distinct strata~ with the soil and topography on Lot 5lA being different from that on Lot 5lB. The lot designated as Lot 5lA has a topography that is sloping to the south with several large benches that are suitable for wide trench type systems. Lot 5lA soil contains an accepting layer of a GW type soil with <5 minutes per inch percolation, rate. This layer of GW 'type is underlain by an SM silty.sand layer, perc tested at 183 SQ. FT./BR, which contains a water table at the current monitored level of 8.58' The soil on proposed Lot 5lB, by contrast, contains only a GP-GW type with an absence of the SM layer to a depth of 13.6'; as per soil log dated June 30, 1983. The topography of Lot 5lB can be called level, with <5% slope. There was no ground water table indicated for the Lot 5lB soil. This soil type and G.W.T. are supported by excavations performed parallel to the south lot line in the road easement, as the Eklutna water pipeline was installed in 1986. As per subdivision standards 15.65.145, the two lots-exceed the 40,000 sq. ft. lot size requirements. There is sufficient area to construct an original and two replacement areas, as shown on the site plan. S 86 20 N AY PropoSed Subdivision: Lots 5lA and 5lB (Con't) Page 2 As the soil layer accepting the sewerage effluent on both lots is graded 85-125 Sq. Ft./ BR, the total reserve space requirement of 10,000 sq. ft. is met in both cases. Lot 5lA has some areas in excess of 25% and a topographic Survey has been performed with areas in excess of 25% slope being cross hatched on the site plan. The bench areas are of 6-12% slope. In order to achieve the reserve area-requirement for Lot 5lB, the existing well will be properly abandoned and a new private well will be drilled in the location shown on the site plan. Well yield tests can be accomplished after the well is drilled. A ground water monitor tube was installed in the test hole located on proposed Lot 5lA. This monitor has a current water level of 8.58' below the ground surface. As per our telephone discussion, I will monitor the water level monthly until June of 1987, in order to determine if there is any fluctuation of the water table and to establish a maximum level. We are then requesting approval at that time, in order to allow the owner to construct a residence on Lot 5lA in 1987. If there are any problems or concerns, please feel free to contact me at 694-5195. Sincerely, Lou Butera, P.E. LB:bls MUNICIPALITY OF ANCHORAGE DEPARTMENT OF HEALTH AND ENVIRONMENTAL PROTECTION 825 L. Street, Anchorage, Alaska 99501 264-4720 SOILS LOG- PERCOLATION TEST SOILS LOG PERCOLATION TEST PERFORMED FOR: LEGAL DESCRIPTION: DATE PERFORMED: SLOPE SiTE PLAN 'o ;.~ ..'. .... ) -.'~,~.~. ~/~ ~' ~ DEPTH? PERCOLA~ 1 2 3 4 5 7 8 9 10 ~WATER 11 ED? 12 TWHAT !3 Gross Net Depth to Net Reading Date Time Time Water Drop ~ ,, /; lq /~ ~,~ ~ '-~ %~ ' ~" 14 15 16 17 18 19 20- ~TION RATE / ~: 3 ~///~/~ //~ {minutes/inch) TEST RUN BETWEEN '~' FT AND ~ FT COMMENTS /C--~ ~- ~'~, ~ ~/~,, .¢' / ~ ~,.¢~ ,*' ~ ¢ ~/~, ~- 7z-~' ~ ,~" ~'/'/~-~' PERFORMED BY: Eagle River Engineering Services P. O, Box 7732¢4 Eagle River, AK 99577 694-5195 CERTIFIED BY: L 3 .L 59 ~ BENSEN y SUBDIVISIO/Iq N89°55'OO"W 527.75' BLM LOT 51A ~ANDONED ~ k CARLISLE N~9°54'OO"W 32B.02' I '~ L 58B I L ]~o' I- GILBERT [ SUBDIVISI L 1 0 YI~NT J SEPTIC SITE PLAN .E_GAL, BLH LOT 51, .T_I_5~SEC,25 OWN~JAN CHURCH EAGLE RIVER ENGINEERING SERVICES PO BX 773294 EAGLE RIVER, AK. 99577 694-5195 J