HomeMy WebLinkAboutTHOMAS L BOYLE BLK 2 LT 14AThomas L.
Boyle
Block
Lot
2
14A
#015-283-20
ARCTIC—SUBARCTIC /
• Geotmlimcdl Enginmring • Petrol.,,,., Geoloq, • Enginmrinp CcologV • orillinq rA,m,;;n..,iq
MICHAEL B. BERGMANN GEOCONSULTANT
BOX 161, STAR ROUTE A. ANCHORAGE, ALA -KA 99502
(9071344-9150
Mr. Michael Downs
P.O. Box 10-1523
Anchorage, Alaska 99511
May 11, 1979
Subject: Soils investigation for sanitary sewer system on Lot 14A, Block 2, Boyle
Subdivision, Anchorage, Alaska.
Dear Mr. Downs:
At your request of May 9, 1979, I conducted a soils investigation at the proposed
location of a sanitary sewer system on the subject lot. This investigation, which was
accomplished on May 10, 1979, consisted of the inspection of soils removed during the
drilling of two test holes, using 6 inch diameter solid flight augers, powered by a
Nodwell mounted CME 45 drill rig. Both hole were drilled to a total depth of 19.0 feet.
The soils encountered are graphically shown on the accompanying test hole boring logs.
The soils consisted of a layer of Organics and Peat 0.5 to 1.0 feet thick, overlying
Silty Clays and Clayey Silts with a trace Gravel to a total depth of 19.0 feet in each
of the test holes.
No water table was noticed during the drilling of the test holes, although the soils
moisture content varied from very moist to (slightly) wet. Test Hole No. 2 was completed
at 1445 hrs. Upon returning to the drill sites at 1736 hrs later that day, a water table
was observed in each of the test holes at a depth of 4.0 feet. On the morning of May 11,
I again returned to the drill site. This time the water tables were measured at 1.0 feet
at 1030 hrs.
It was noticed that upon taking a sample in hand and shaking that the soil liquefied.
The topography of the lot consists of a very gentle slope in awestward direction of
approximately 1 to 2 per cent.
Vegetation present on the subject lot consisted of dense moderately tall black spruce,
with occasional birch trees, some alders and willows and a low ground cover of mosses
and grasses.
An accompanying sketch shows the subject lot with the approximate locations of the test
holes in relation to the property lines.
It is unfortunate, but the presence of the very high water table combined with the
poor soil types encountered would seem to virtu111y-preclude construction of a sanitary
sewer system on this property. Please feel free to take this report to the Anchorage
Department of Health and Environmental protection and get their opinion.
I appreciate the opportunity to be of service to you. Please contact me if you have any
question regarding this soils investigation.
Very ur
Michael B. 11r
Consulting Ge ogist
x,7: n^nartmnnt of P-Alth .anei F.nvirnmm�ntal Pr^tnr•tinn
N U -U/- W
100-
1081
56'
46'
o
7T.
o. '2
T. It. No. 1
Lot 14A, Block 2, Boyle
Subdivision, Anchorage, Alaska
T. H. No. 1
0.01
-� Organics & Peat, loose,
moist, green - brn.
%.— — — ---0.5'
.4.0'AB 1736hrs 5-10-79
Silty Clay to Clayey Silt:
w/trc Gravel, vy moist to
wet, soft, gry, siltier
e zones are generally wetter,
e soil is liquefiable.
1
D (ML -CL)
D
19.0'TD I
on 5-11-79 @ 1030 hrs.
T. H. No., 2
5-10-79
y Organics & Peat, loose, 0.0'
a
e \moist, green - dk brn.
1.0'
4.0'AB 1736hrs 5-10-79
N 0007' W 165'
30' 30'
Gander Street
Silty Clay to Clayey Silt:
w/trc Gravel, vy moist to
wet, soft, gray, siltier
zones are generally wetter,
soil is liquefiable.
(ML -CL)
Distances are approximate and have not
been measured by surveying methods as
ON
to locations of test holes. 19.0'TD
Water table measured @ 1.0'
NOT TO SCALE on 5-11-79 @ 1030 hrs.
Michael B. Bergmann...
-Consulting Geologist';., :r'. ;;'^v^,;': ^ •; Test Hole'Boring Logs represent soils
Box 191, Star Route A encountered on Lot 14A, Block 2,
;j Anchorage, Alaska" 99502'' ":': Boyle Subdivision,'Anchorage, Alaska
(907)344-9150
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