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Home My WebLink AboutSELKREGG Lots 4A & 5A-1 S-11865Selkregg Lots 4A & 5,4-1 511865 Pannone Engineering Services LLC Steven R. Pannone, Principal Registered Professional Engineer E-maih steve(~panengak.com November 3,2011 Sentec 2525 Gambell Street, Suite 200 Anchorage, Alaska 99503 Subject: Selkregg Subdivision, Lot 5A-1 Water Availability Report You contacted PES to determine if there is adequate water for the proposed subdivision. This report will detail my findings. PES researched the record information of the lots surrounding the proposed lot. The Selkregg & Vuetor Subdivisions are a remaining area that is on private water and wastewater systems. The wells in this area were mostly drilled in the early 1960's and 70's. The MoA did not have well logs for many of the lots, so PES performed a site investigation to determine depth and static water levels. The wells in these subdivisions are typically 100 to 175 feet deep. The static water levels range between 55 and 70 feet deep. The existing well flow data that was available showed that the wells with record data could produce approximately 15 gallons per minute. Based on the record research and field data we collected, there appears to be adequate water available for the proposed subdivision. The well will be approximately 175 feet deep and will produce between 10 and 15 gallons a minute, which is above the minimum requirement established by the MoA well Code (AMC 15.55). If you have any questions or concerns, please contact me at 227-3522 or 272-8218. Mailing: P.O. Box 100217, Anchorage, AK 99510-0217 Physical: 615 East g2~° Ave, Cuite g6, Anchorage, AK 99503 Telephone: (907) 272-8218 FAX: (907) 272-8211 Pannone Engineering Services LLC Steven R. Pannone, Principal Registered Professional Engineer E-mail: steve~Danen~ak.com November 3,2011 Sen/cc 2525 Gambell Street, Suite 200 Anchorage, Alaska 99503 Subject: Selkregg Subdivision, Lot 5A-1 Soils Investigation Your contacted me to log a soils test hole to determine the suitability of the lot for an on-site wastewater disposal system and to determine the on-site disposal reserved area required by the Municipality of Anchorage for a subdivision. The soils investigation was conducted on November 17, 2011. One test hole was excavated on the lot on that date. The attached soil log shows the soils that we encountered. The lot is currently vacant. The intent of the investigation was to determine if the soils are acceptable for an on-site wastewater disposal system. The soil we encountered in the test pit was a layer of silty sand and gravel, with pockets of silt, beneath this layer was a layer of gray silt. The silty sand at a depth between 4 and 5 feet was found to have a percolation rate of 17.5 minutes per inch. No groundwater was observed in the test hole and water monitoring is ongoing. We did not encounter bedrock in the test pit. The lot consists of a realitivly flat area above a steep slope approximately 20 feet high, and a lower area below the slope that with a grade approximately 5-7 percent to the west. Chester Lake is located approximately 190' from the western property line. In conclusion, the soils investigation shows that a conventional wastewater system and a wide trench type soil absorption system will be adequate for the this property based on the percolation test performed and the ground water monitoring conducted to date. I would recommend a deep trench 5' wide, with 4' of effective depth, by 100' long. A well will need to be drilled on the lot,. The septic system must be located at least 100' from any wells on this lot or the surrounding lots, and from any surface water. Municipality of Anchorage Wastewater Code, 15.65.180 Subdivision Standards for Lots to be Served by On-Site Disposal Systems requires 14,000 square feet of area to be reserved for a septic system on lots with a percolation rate from 12-24 minutes per inch.. If you have any questions or concerns, please contact me at 227-3522 or 272-8218. Sincerely, Steven R. Pannone, P.E. Civil Engineer Attachments: (1) Soils Log Mailing: P.O. Box 100217, Anchorage, AK 99510-,0217 Physicah 615 East 82nd Ave, Cuite B6, Anchorage, AK 99503 Telephone: (907) 272-8218 FAX: (907} 272-8211 ~ ~ ~ ~w~.. (E) // FOR MoA REVIEW ONLY P.O. BOX 100217 ANCHORAGE, AK 99,510 PHONE (907) 272-8218 FAX (907) 272-8211 ~." ~"~ fa Sco~e ........ P,I,~. NO SELKREOO S/D, LOT 5A GILLIAN 8RUBAKER ~ GLENN ARMSTRONG ~,~'. CE 8149 .~ =ER~IT NO. 2201 OTTER STREET ~I~.. ...~ xxxxxxxxx PLAN ANCHORAGE, AK 99504 ~l~-¢A~ Sh..t 10FX TEST HOLE i SOILS LOG - PERCOLATION TEST SLOPE / i/ i S'TEP ?i/'? / 1 ROOTMASS 100' OFFSET T0 ~KE SIL~ SANDY X WAS GROUND WATER SLOPE ~4 ~ ENCOUNTERED? ~ 15 ~ ML G~Y SiLT IF YES, AT W~T ~6 ~ DEPTH? -~' X ~ 7 DEPTH TO WATER A~ER BOH MONITORING? ~'~ 19 R~DING DATE CLOCK NET ~ME L~L NET DROP TIME READING 2 12:45 10 MIN 4,36 0.61 4 12:55 10MiN 4.35 0.60 6 1:05 10 MIN 4.32 0.57 PERO~TION ~TE 17.5 (Tin/inch) PERC HOLE DIAME~R 6 in.es TEST RUN BE~EEN 4 ~AND 5 COMMENTS: Test hole excavated by BEEK'S EXCAVATING. ~ec hole was preso~ed. Test ~n for one hour. Last 3 read~ reposed PERFORMED BY: Steven R. P~none~ P.E. I CERTIFY THAT THIS TEST WAS PERFORMED IN ACCORDANCE WITH ~L STATE AND MUNICIPAL GUIDLINES IN EFFECT ON THE DATE OF THIS TEST. FOR REVIEW ONLY P.O. BOX 100217 ANCH0~A~E, AK 995~0 ~ ....... ~ ~/a~/~2 PHONE (907) 272-82~8 FAX (907) 272-8211 NTS SELKRE~G, LOT SA-1~~~e-- ~.Lo. NO GILLIAN BRUBAKER AND GLENN ~ JULIANA A~MST~ONG ~'. CE e1~9 :~w~ ~M~ NO. 2201 OTTER STREET ~ ..... Sheet SOILS LOG ANCHORAGE, AK 99504 OF1 READING DATE CLOCK WA~R TIME NET TIME LEVEL NET DROP READING I 11/17111 12:35 --- 3.75 --- 2 12:45 10 MIN 4,36 0.61 3 12:45 ... 3.75 .- 4 12:55 10MIN 4.35 0.60 5 12:55 ... 3.75 E 1:05 10 MIN 4.32 0.57