HomeMy WebLinkAboutSTUCKAGAIN HEIGHTS Block 2 Lot 4 Soils InformationL. oT
$31/~~UG 1G 197:~
GEOLOGIC SOIL INVESTIGATION
OF
LOT 4, BLOCK 2, STUCKAGAIN HEIGHTS
~ Portion of the NE 1/4, Section 6,
Township 12 North, Range 2 West,
Seward Meridian, Alaska
June 29, 1973
PREPARED FOR:
Roger Bonnett
639 "I" Street
Anchorage, Alaska
PREPARED BY:
HEWITT V. LOUNSBURY & ASSOCIATES
723 W. 6th Avenue
Anchorage, Alaska 99501
W.O. #73-266
TABLE OF CONTENTS
INTRODUCTION
SITE INVESTIGATION
FIELD INVESTIGATION
SUB-SURFACE CONDITIONS
CONCLUSIONS AND RECONMENDATIONS
LOCATION HAPS
TEST LOGS
iNTRODUCTION
This report is a result of field investigations conducted on June
1 and June 22, 1973, on properties east of Anchorage known as Stuckagain
Heights Subdivision, Lot 4, Block 2. The area comprises about 2.0 acres.
The purpose of this investigation is to survey the surface and sub-sur-
face conditions and to determine the feasibility of the proposed rest-
dential development.
SITE DESCRIPTION
The property under investigation is in its natural state except
for the brushed trail on its south and east boundaries. There is only
one structure, located on the lot to the west (Lot 5, Block 2), adjacent
to the property. The adjoining lands are completely undeveloped. The
land is on the western slope of the Chugach Mountains and slopes at about
20 percent. It is irregular in topography and has a few good locations
for homes. The area is heavily wooded with large spruce and birch but
contains some open spaces covered by grasses. There is a natural drain-
age along the trail in the vicinity of Test Hole No. 2. (See Location
Maps).
FIELDINVESTIGATION
Soil investigations consisted of two test trenches dug with a
Drott 40 backhoe. Visual inspection was made of the trenches and logged
in this report. Trail cuts were also observed. Access was limited in
the northeast portion by steep ground immediately adjacent to the trail.
SUB-SURFACE CONDITIONS
The U. S. Geological Survey Bulletin 1093 defines the soils in
this area as glacial drift, undifferentiated and lateral moraine.
Observations of the test holes recealed materials generally assoc-
iated with the descriptions of glacial drift (i.e. partly till and partly
outwash composed of stratified sand, pebbles, and cobble gravel). This
is confirmed by the topography of the area, consistent slopes broken by
descending hummocks of the moraine. The gravels and sands encountered
were very slightly silty and overlain by organic layers. The only
moisture visible was surface runoff in the area of the drainage pre-
vi.ously described. It was not a consistent flow. Reports of other sub-
surface C~nditions are scarce but residents state that water well
levels are from 125 feet to over 200 feet in bedrock. On-site disposal
facilities are reported satisfactory.
CONCLUSIONS AND RECOMMENDATIONS
We conclude that the area under investigation is suitable for the.
proposed residential development. Adequate areas should be set aside
on each lot to develop on-site utilities in accordance with regulations
of the Greater Anchorage Area Borough and the State applicable at the
time of construction. Extension of public water distribution and
sewage collection systems into this area within the next several years
appears extremely remote.
A factor of approximately 90 square feet per bedroom is recommended
for design of on-site disposal systems for single'family residential use.
It is also recommended that disposal pits be located as deep as possible
and that the tops of pits be no shallower than 2' through 4' below the
existing surface depending on the organic and silty layers encountered.
R6spectful ly submitted,
HEWITT V. LOUNSBURY & ASSOCIATES
N
T.E%T t4o,,_E. LocA, TlOl4 t~AT~
I
I
L~T ~
£~G OF THST BORIIgG
Begun · ~ //ale No.
Engineers ~ Surveyors T~I~I Depth
P~.~I Na ~- ~ ~ Anchorage~ . Alaska
Met~od Used
· Field Party
we~e~
C--L--f:YfL~(' , Geolag/sl
Ground Water Table
DESCRIPTION Locah~n Notes £ Diagram:
SoU lype~ color~ tedure~
depths circu/aDDn lost, . . .
~te Completed
,%'olec! Name
Method U~ed
Field Porty.
Sampl£ng
ZOG OF TEST t~ORING
I-lewitt. V £ounsbury '~ Associates.
Engineers -- Surveyors
Anchorage, . Alaska
C~.~- ..
D~SCR IP Ti ON
Soil type~ color, tenure,
estimated ~artic/e size,
sampler driWn~ nates,
deaths circulation lost~
notee on drilling eas~,
bffs .used~ etc.
No/eNo
Sheet
Total Depth
I Ground Water Table
Location Notes 6 Diagram:
_Unl~e~s otk~r?~e~oted aH sa~np,'.~s are ta#~n w/L4 tO Standard .°u.~etrot/on Sump, e, driven w/Iq0 lb. ham, n.r JO drop.
!
'bi
~S8 !,001.10