HomeMy WebLinkAboutDUHILL S-3620@
,5
ANCHORAGE, ALASKA 99503
PHONE: 907-279-2581
March 3~ 1975
Alaska Land Development
4546 Business Park Blvd.
Anchoragef Alaska 99503
Attention:
Subject:
W. Tucker
Kenworth*- Rumsey Propertyf Eagle River~ Soils
Gentlemen:
In response to your request we have reviewed the logs of the
6 test holes~ cut faces and pits in the subject area.
These data indicate the soil mass to be competent free
draining sands and cravels with mnuersperse cobbles and
boulders. Cobble a~d sand layers are common to the site.
A thin, several, foot, layer of silty gravelly-sands overlay
the site and supports vegetation.
The water table was encountered only in the well (test hole
~1) and then at 45' below grade. (It is our understanding
that water was intercepted at 119' and rose to 45' in the
drilled water well.)
The permeability of the NFS soils is very great and should
prove suitable to minimum size leaching pits. A value of 85
sq./ft./bedroom is reasonable to these materials.
The test holes, pits and cut faces were logged by~r. Ken-
worthy~ technician of our staff.
We trust the following is sufficient and complete to your
i~m~ediate needs.
Very truly yours,
ALAS~qA TESTLAB /Q
HRL: rb
Enclosures
Test Pit #1
Depth in Feet
From To
0.0' 1.5'
1o5' 20.0'
Bottom of Test Pit:
Frost Line:
Free Water Level:
Remarks:
W.O. #
Soil Des cri~tion
F-l, reddish-b, rown, ~il_t~ ~ ~rave~l with a few
cobbles, damp to dry, 4"-, C~i
NFS, brown, sand~v_ ~avel with cobbles and boulders
(cobble layer at 5°0' to 6~0'), dry to dampt
GP
20.0'
Not Recorded
(45')
1o Water well total depth 119.0'
Test Pit 92
Depth in Feet
From To
0o0'
1.0' 10.0'
Bottom of Test Pit:
Frost Line:
Free Water Level:
w.o. %
Soil Description
reddish-brown, silt~ ~and~ravel with a few
cobbles, damp~ 5"-, C~
NFS, brown, layered, sand~ ~ravel with occasional
cobbles and boulders, dry to damp (cobble layer
° 24"~ GP
at 4 0' to 5.0'), ,
10.0'
Not Applicable
None Observed
Remarks: 1. Basement excavations
Test Pit ~3
Depth in Feet
From T~
0.0' 1.5' ~
1.5' 14.0'
Bottom of Test Pit:
Frost Line:
t. ree Water Level:
Remarks:
soil Description
F-l, reddish-brown, sit_~t~ s~nd~ ~ravel, dry to
damp, 3"-f GM
NFS, brown, layered sandy nravel witch cobbles and
boulders, damp, 18''m, GP
14.0'
None
None Observed
1. Pit for leaching field
Test Face #4
Depth in Feet
Frcm To
0.0'
1o0' 12.0'
Bottom of Test Face:
Frost Line:
Free Water Level:
Remarks:
w.o. It
soil Descriotion
F-2, reddish-brown, ~ilty ~andy. ~rave]., dry to
d~npf 4"-, GM
NFS, brown, layered sand~ oravel with occasional
cobbles and boulders, dry to damp, GP, (includes
sand layers)
12.0'
Not Applicable
None Obsemved
1. Cut face along road
Test Face ~5
Depth in Feet
From To
0.0' 1o25'
1.25' 14.0'
w.o. tt
soil De s c_~_r.j.p t~j.o n __
F-i~ reddish-brown, silty sandy _qravel, drv to
damp, 3"-, GM
NFS~ brown~ sand)i eravel with occasional cobbles
and boulders, sam__~ layers, dr.v to damp, ].~"-, GP
Test Face I~5 (continued) WoO. t~
Bottom of Test Face:
Frost Line:
Free Water Level:
Remarks: ~ 1.
14.0'
Not Applicable
None Observed
Cut face along road
DEQ Comments
Page Three
March 19, 1975
This area is of concern to us as it was proposed for ~l-9 zoning
under the area G-5 plan~ Tile property is not exceedingly steep
but does have 25% slope. Water availability will be a problem
in this area and this is why we recommend a public water system
under development plan A. This area is sub, eot to high winds°
m~inly in the spring and fall, which leads to erosion
problems.
We feel this proposal deserves a closer scrutiny and ~ve recommend
that the ease be postponed until the engineer is able to provide
all the data as required o This case has been discussed several
times with the engineer and the developer's representative,
23. So3620 Duhill Subdivision
This property is served by individual utilities. The lot size, slope
and water availability are all adequate for single family residences,
The house on lot 3 has adequate area to replace the sewer system.
24. S-3621 Meadow Brook Subdivision
This property will be served by public water and on-site sewer.
The lots are adequate as submilted and this plat was approved at
the March 18 Platting Board Meeting~
25. S-3622 Spanish Hills Subdivison
This property will be served by individual utiltties~ The soils tests,
lot size end water information all show these lots are adequate for
single family residences°
26. $-3597 Seacliff Plaza Subdivision
This property will be served by public sewer and water. Both must
be covered under the subdivision agreement,
The water system is privately owned by the developer of Seaeliff
Subdivision. We have no assurance that this syslem is adequate
to serve all the lots in Seacliff Subdivision plus the proposed
P.U.Do We have asked for written assurance from the developer's
engineer and as of the date of this memorandum have not received
this statement,
We recommend that a eonditon be added to the approval that
~the P .U ,D. development be served by an approved public
water supply and that this supply be provided by the developer