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Home My WebLink AboutBIRCH HILLS ESTATES #1 Block 1 Lot 3 S-4013Birch Hills Estates #1 Block 1 Lot 3 4040 "B" STREET, ANCHORAGE, ALASKA 99503 PHONE: 907-279-2581 March 16, 1976 W.O. ~17622 Grid N~.~ 253 Mr. Robert C. Johnson P,O. Box 456' Eagle River, AK 99577 Subject: Subsurface Investigation - Lot 3, Block 1, Birch ttills Estates, Addition No. 1 Dear Mr. Johnson: Transmitted herein in accordance with your'instructions are the results of the'above referenced investigation as performed by us on Marqh 10 a~d 11, 1976. The scope of this project is investigation for suitability of an on-site sewerage system. Included in this transmittal are': Test Hole Location Sketch Figure Test Hole Log ~ Table A Explanatory info'rmation Sheets 1-3 The exploration was conducted using a track mounted ~obile Drill model B-50 drill r~ with a continuous flight solid stem auger. The rig is dwned and operated by Denali Drilling, 'Inc. Drilling was supervised, the test holes logged and the percolation test run by Mr. Terry Barber. Two test holes were placed at the approximate locations shown on the Figure 1. The logs of these test holes are included as Table A of this report. In interpreting the log it would be helpful to utilize the explanatory information contained in Sheets I to 3 of this report. When drilling was compieted a 3/4" slotted PVC pipe was inserted in the hole to aid in determining the free water level. For~ the percolation test, the test hole was filled with water and left overnight to saturate. On returning the hole was refilled with water and the drop ~n the water level carefully monitored over the next 60 minutes. This procedure is not a standardized percolation test, how- e~r, we understand that the Anchorage Department of Environ- mental Quality prefers tests performed in th'is manner'to evaluate a site for a proposed on-site sewerage system. Mr. Robert C. March 16, '1976 Page 2 Using the above test, the observed minimum perco!ation rate was 2.5 minutes/inch for test hole 1 and 5.0 minutes~inch for test hole 2. We hope this report meets your present needs. If we can be of further service, please do not hesitate to contact us. Very truly yours, ALASKA TESTLAB }~elvin R ~lichols, C.E. Laboratory Supervisor MRN:rb Enclosures Test Hole 1 Table A Date: 3/11/76 Logged By: TB W.O. ~17622 Depth in Feet From To 0.0' - 17.5' Bottom of Test Hole: Frost Line: Free Water Level: Soil DescriDtion F-l, brown very silt~ ~an~!y. ~ravel, GM, damp. -~-~· 17.5' 12.5' Test Hole 2 p.epth in Feet · From To 0.0' - 20.0' Soil Description F-l, brown very silty sand. y gravel, GM, many cobbles, damp. Bott'om of Test Hole: Frost Line: Free Water Level: 20.0' 4.0' None Observed R&M Civil Engineers EERING & GEOLOGIC' . CONSULTANTS 229 EAST 51st. AVE. - P.O. :BOX 6087 - ANCHORAGE, ALASKA 99503 TELEPHONE 907-279--0483 TELEX 090--35419 Geologists Land Surveyors JAMES W. ROONEY, P. E. MALCOLM A. MENZIES, P.E., L.S. JAMES H. WELLMAN, P.E. RALPH R, MIGLIACCIO Engineering Geologist. July 24; 1973 R & M~Project No. 36633 BECE~¥'EI) Mr. Howard Nugent Star Rt. 349A Wasilla, AK JUL b, 01973 (.%REATER ANCHORAGE AREA BOROUGH J~EPT, ~F EN¥It~eNNIENTAL GJUALITY Test Hole and Soil Log Report for Sanitary System Lot 3, Block 1, Birch Hills Estates Dear Mr. Nugent: We are submitting herewith the test boring results and our continents regarding soil conditions encountered at the subject site. This investigation was performed in accordance with your request of July 7, 1973, and those procedures outlined in a letter dated September 13, 1971 by Mr. Rolf Strickland of the Greater Anchorage Area Borough Department of Environmental Quality. A single test hole was put down Within the Lot 3 area for the purpose of defining general subsurface soil conditions for the proposed sanitary system. Excavation was accomplished with a tractor-mounted backhoe and the test hole was extended to a total depth of 7 feet below ground surface. The final log prepared for the test hole has been included in DYawing A-01. Ground water was not encountered in the test hole~. We appreciate being given this opportunity to be of service to you. Should you have any questions with regard to the above, please do not hesitate to contact us. Very truly yours, R & M ENGINEERING & GEOLOGICAL CONSULTANTS James W. Rooney JWR: ph xc: GAAB ANCHORAGE FAIRBANKS JUNEAU T.H.- I 7 -7 ~"0 ORGANIC SILT TRACE SAND AND GRAVEL O. OI 2.O~ SANDY GRAVEL, WITH COBBLES (GW) 7.0~ No Water Table T.D. Note 'Fest hole excavted with tractor mounted backhoe. Bedrock encountered at 7.0 feet. Engineering E~ Geological Consultants A ~ c~o~e¢, ~T~ANKS ALASKA Crawford Property LOG OF TEST BORING Eagle River Alaska aA-r-~ 7-26-75 [SCALE I" : I' ,tOWN BY B~R-$. t, CHKD BY W.E.D. ,1PROd-NO- 36635 tDWG NO. A-01 4040 ':B" STREET, ANCHORAGE, ALASKA c~9503 PHONE: 907-279-2581 Mr. Robert C. Johnson P.O. Box 456 Eagle River, AK 99577 April 5, 1976 W.O. 17652 Grid NW 253 Re: Subsurface Investigation - Lot 3, Blk 1, Birch Hills Estates, Addition No. 1 Dear Mr. Johnson: This report is an addendum to our report dated March 16, 1976, and previously sent to you. It covers a third test hole placed in the northern portion of the lot. It is about 50 feet west of Dee Lane and 100 feet south of the north boundary of the lot. .~ The hole was placed on March 31, 1976, using a Mobile Drill B-50 drill rig mounted on a Flextrac-Nodwell tracked vehicle owned and operated by Denati Drilling Inc. The drilling was supervised and the test hole logged by Mr. Terry Barber, staff geologist with Alaska Testlab. We were unable to run a percolation test in the hole. We ·placed over 100 gallons of water in the hole and could not get the water level above seven feet. We could not run a mechanical analysis of the soil either, because we could not obtain a representative sample off the auger flights. Using an assumed percolation rate of no more than 3 min./inch would be quite conservative. No water table was encountered during drilling. The water table will fluctuate, though, with seasonal and climatic changes. Very truly yours, ALASKA TE S TLAB Melvin R. Nichols, CE Laboratory Supervisor MRN:mm Attachment Lot 3, Block 1 TABLE A W0#17652 Date: 3/31/76 Logger: T.B. Depth in Feet From To 0.0 12.0 12.0 18.0 SOIL DESCRIPTION F-l, reddish brown Silty Sandy Gravel, GP/GM, cobbles, damp. F-l, brown Silty.. Sandy Gravel, GP/GM, damp. Bottom of Test Hole: Frost Line: Free Water Level: 18.0 ft. 6.0 ft. None observed NOTE: Broke through hard layer at 12.0 ft.