HomeMy WebLinkAboutTRAILS END BLK 8 LT 2 'Ooo
3'
BORING NUMBER ! Date Completed: 6-2-78 LOCATION SKETCH No ScaLe
~ N T.H. 1
~ ~ ORGASMIC MATEP~IAL
~ ~ ~rk Bro~ Slightly ~ist ~ 2
4~
4 ~ 80'
-- ~ · 4.5,
'
SILT W/~CE S~D ~D ~TROGONOF
G~L (~)
BlUsh-gray, Slightly ~ist
-- ~ Moist,
~ Stiff ~ Fi~
~ NOTE: DISTANCES SHOWN AR~ APP~OXI~AT~ AN~ HAV~
& NOT 8[EH MEASURED BY SURVEYING
...... 11.0'
EXPLANATION
I~ ~ ORGANIC MATERtAL
~9-~ LittJe V~s~ble ice OHO
S~DY SILT (~SM) W/T~
~ ~ B[DROCK
-
.:,: Wet~ Black, Soft a ~u6~&
Water Table Enco~tered ~ 18' W.D.
SOIL SXMBOLS ~ =m
OAT[ 6 5 78 J ~[ ........................... T~ END S~DI~SION
[OWO.NO A 01
12:40
12:41
12:42
12:43
12:44
12:45
12:46
12:47
12:48
12:49
12:50
12:55
1:00
1:05
1:10
1~20
1:30
1:40
EIAPSED
1
2
3
4
5
6
7
8
9
10
15
25
3O
4O
5O
6O
PERCOLATION TES~
ERIK DYRUD
R & M NO. 851125
FEET
4.5
4.5
4.5
4.5
4.5
4.5
4.5
4.5
4.5
4.5
4.5
4.5
4.5
4.5
4.5
4.55
4.55
4.55
DROP IN INCHES
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0.6
0
0
0.6
100
Inches Total Drop
Minutes Per Inch
June 6, 1978 R&M I~o. 851125
Hr. £rik Dyrud
401 East 36th Avenue
Anchorage, Alaska 99503
Subject: Soil Investigation for Sanitary Sewer System, Lot 2, Block'8,
Trails End Subdivision, Anchorage, Alaska
Dear Hr. Dyrud:
At your request of May 26, 1978, we conducted a subsurface soils investi-
gation at the proposed location of the sanitary sewer system on the subject
lot. The investigation complied with those procedures required by the
Municipality of Anchorage Department of Health and Environmental Protection.
This investigation, which was accomplished on June 2, 1978, consisted of a
test hole drilled to a depth of 20 feet below the existing ground surface.
The test hole was sited according to your instructions and its location is
shown in attached Drawing AoO1. Drilling was accomplished with a rotary
drill rig using continuous flight solid-stem auger with an outside diameter
of 6 inches. A sample was taken at the depths shown on the soils log in
Drawing A~01. The sample will be held in storage at our lab for approxi-
mately six months. In addition, all material brought to the surface by the
augers was continuously monitored by an experienced engineering geologist.
The topography at the drilling site is generally gently-sloping. At the time
of the investigation the site had original vegetation consisting of alder and
grasses. The top of the test hole was located at original ground surface.
The soils encountered in the bore hole are shown in the test hole log in
Drawing A-01. This log displays specific conditions encountered at the test
location. However, subsurface conditions may vary in other parts of the
without any apparent surficial evidence of the change. Groundwater was
encountered in the test hole at a depth of 18.5 feet. Bedrock was ~ot
encountered. At the time the hole was drilled seasonal frost was not pre-
sent. Permafrost was not encountered.
A percolation test was performed within an additional 10 foot bore hole
located with 3 feet of the first hole at the depth shown in the attached
Table 1. All depths were measured from the top of the hole. The data in
Table 1 show average infiltration from the depths indicated to the bottom of
the hole. The measured percolation rate was 100 minutes per inch.
The 20 foot test hole log indicates that the water table was at 3 feet after
boring. This resulted from water rising to fill the test hole from the water
table encountered at 18.5 feet while drilling. The additional ten foot test
hole which was drilled for the pert test did not contain water as the bottom
of the boring was above the water table.
June ~, 1978
Mr. Eric Dyrud
Page -2-
We appreciated this opportunity to be of service to you. Please contact us
if you have any questions concerning this letter or if we can be of addi-
'tional service.
Very truly yours~
RF~ CONSULTANTS, INC.
Lynne Kosikowski
Staff Geologist
Jim HcCaslin Br~n, Ph.D.
Project Hauager
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