HomeMy WebLinkAboutCOUNTRY PARK ESTATES Lots 1-4 S-7963 Expired 02-19-88
MUNICIPALITY OF ANCHORAGE
DEPARTMENT OF HEALTH & ENVIRONMENTAL PROTECTION
Environmental Health Division
CASE REVIEW WORKSHEET
CASE NUMBER: DATE RECEIVED: COMMENTS DUE BY:
S-7963 January 3, 1985 January 18,
SUBDIVISION OR PROJECT TITLE:
Country Lane Estates Subdivision, Lots 1 - 4 with Vacation
1985
.,O-PUBLIC WATER AVAILABLE
( Q~' ) COMMUNITY WATER AVAILABLE
PUBLIC SEWER AVAILABLE
71-014 (Rev. 5/83)
800 Cordova, Suite ]01
(907) 279-0673
Telex: 090-Z5227 Cable address: DAMEMORE
November 15, 1984
Mr. Robert W. Robinson
Municipality ct Anchorage
825 L Street
Mail Stop 6-650
Anchorage, AK 99502
Dear Mr. Robinson:
On November 1-2, 1984, we performed a soils investigation and four
percolation tests fbr Lot 14, Section 26, I13N, R3W which is located bet~en
Baxter Road and Campbell Field Airstrip Road in Anchorage, Alaska. The m,~er
plans to subdivide this lot into four lots,for development of single family
dwellings with onsi. te water and sewer. Four test pits were dug with a
backhoe on the lot and subsurface conditions were loqged at the locations
indicated on the attached site plan. A copy of the field coil logs is also
attached. All four holes encountered similar soil conditions ~Aich consisted
of a 1-3 foot peat layer over sands and gravels with a trace to some silt.
The silt content below 4 feet was estimated at less than 5 percent, and
subsequent percolation tests confirmed a relatively small silt content. The
soils below the peat layer were dry to slightly moist and there was no
evidience that the water table ever rises to the depth of the bottom of the
test pits. Frost penetration was noted at 1 lo 1-1/2 inches below the ground
surface at the time of the invesligation. 1-inch diameter PVC pipe (slotted)
was placed full depth in each test pit prior to backfilling.
Four percolation tests were run al a deplh of approximately 4 feet below
the ground surface, one near each of the test pits. The percolalion tests
were run in accordance with the specifications set Forth in the EPA design
manual entitled "Onsite Wastewater Treatment and Disposal Syalems", (Oclober
1980)..Table 1 presents the resulls off the pereolation tests, togelher with
lhe adjusted soil rating to be used For drain~ield design.
TABLE 1
PERCOLATION TEST RESULTS
Test Pit
No.
Percolation
Rate (minutes/inch)
1 29.6
2 9.5
3 9.2
4 14.1
Adjusted Soil Raking
(square Feet/bedroom)
'285
150
150
189
November 15, 1984
Mr. R.W. Robinson
Page 2
Dames & Moore
It should be noted, the apparent low percolation rate measured near feat
Pit No. 1 was caused by a local zone of silEier soil. Ihs soil at the same
depth within the test pit (approximately 3 feet form the perc test) was
logged as a relatively clean sand and gravel mix. We believe this locally,
less permeable zome~ may be an anomoly within a strata of' relatively pea'me-
able soil. Approximately 24 hours after the investigation was completed, the
standpipe pi~ometWrs were aLl--nd to be dry:---
Based on our findings, we believe that adequate sanitary drain fields can
be designed for the development described above. The ov~er is directed by
copy of this letter to comply with the following Municipal requirments:
o Drain fields must be located within 10 feet of the percolaLion
tests
~ o Individual wells for on-site potable water must be located at least
~ 100 feet away from the drain field
o A community well muse be located at lea [~O~t away from a drain
field
o other requirements as appropriate
We hereby request approval for on-site sewage disposal for the develop-
ment described herein. If you have any questions regarding the.cootents of
this letter or if we can be of assistance to you in the FuLure, please
Sincerely,
DAMES & MOORE
Thomas ~. Krzewinski~ P:E.
Associate
l~edore A. Hammer
Staff Engineer
TGK:TAH:dlg
Enclosures
xc: Hr. Erv Terry
~)
MUNICIPALITY OF ANCHORAGE
DEPARTMENT OF HEALTH AND ENVIRONMENTAL PROTECTION
825 L. Street, Anchorage, Alaska 99501 264-4720
SOILS LOG -- PERCOLATION TEST
SOH.S LOG
PERCOLATION
TEST
LEGAL DESCRIPTION: ,~'~c'~'oL'''I '~
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18-
20-
WAS GROUND WATER
ENCODNTERED?
, , /
IF YES. AT WI4AT
DEPTR?
Reading Date Time
?v
PERCOLATION RATE
TEST RUN BETWEEN
'¢ ¢".;\ No. dE.472t .::~iB
~,,. I ._,'~'"
'(L~?,~"'..-[ ...... :"~.;.~
FT AND i ~ ~' FT
72.008 (6/79) ·
MUNICIPALITY OF ANCHORAGE
DEPARTMENT OF HEALTH AND ENVIRONMENTAL PROTECTION
825 L, Street, Anchorage, Alaska 99501 2G4-4720
SOILS LOG - PERCOLATION TEST
[-7'~'- oOiLS LOG
PERFORMED FOR:
LEGAL DESCRIPTION:
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
20
7' ,.
/
WAS GROUND WATER
ENCOUNTER ED?
COMMEN'rS
TEST RUN OETWEEN ' FT AND Fir
PERFORMED BY:
72-008
MUNICIPALITY OF ANCHORAGE
DEPARTMENT OF HEALTH AND ENVIRONMENTAL PROTECTION
SOILS LOG - PERCOLATION TEST
{ ~'"'" Pr RCOL;,T~ON
PERFORMED FOR: (~.'"' v
LEGA DESCRIPTION:
10
11
12
13-
14-
15-
16
17-
18-
19-
20-
~. ,-/- /;2.. /
/
WAS GROUND WATER
/vr.o
ENCOUNTERED?
S
IF YES, AT WNAT
DEPTH?
i
~......:...-~.~=.........- - .
· 1~ ~to. CE-4721
PERCOLATION RATE (minul~s/inch)
RUNIETWEEN FT AND ~ FT
)top
PERFORMEO BY: ~ {
MUNICIPALITY OF ANCHORAGE
DEPARTMENT OF HEALTH AND ENVIRONMENTAL PROTECTION
825 L. Street. Anchorage, Alaska 99501 264-4720
SOILS LOG - PERCOLATION TEST
PEREO*MEO FOR: ~--~-,"¢'
LEGAL DESCRIPTION: .~?~'..r'/,O~J
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15-
16
17,
18-
20
WAS GROUND WATER /~) iS.
ENCOUNTERED? - ?
E
IF YES, AT WHAT
Reading Date Time Time .~. Wal,~r'; '~." . Drop
..'i',' s. '.~ ,';-
5':.'~," ~, "? ~" ~-
PERCOLATION RATE Imirlules/in,:h) //~f~ ,/
TEST RUN BEIWEEN 'X/X/ FT AND /-7//'~' FT
PERFORMED BY: '-'7--~'~
72-008 (6/79)
Susan Oswal t
Dept. of~1~I-~.~.~u~. &EEnv. Prot.
SUBJECT S-'79~3 Countr,y LaneEEstates S/D DATE 1 / 18 / 85
ME55A(~E Our comments on %he above preliminary plat are amended to read
as follows: This Department will reguire that prior to final, plat aDproval,
~he sewer system serving tl~e ex~st~ng d~ell~ng shall }De aban~oned and that
a S~ate of Alaska Dept. of Env. Conservation Certificate to Operate .a Class
C well [,e obtained. ~he well on Lot 4 (serving the existing dwelling) ~,*~111
also be abandoned.
RETURN TO ~ SIGNED z/~ ~~'
RE~LY
(F~EIDIFOFIMI® 4S 47'2
SIGNED DATE /
S~JD PARTS I AND 3 INTACT - POLY PAR (50 SETS) 4P472
PART 3 WILL BE RETURNED WITH REPLY.
Economic Development & Planning
Attn: Jerry Weaver
Municipality of Anchorage
Dear Mr. Weaver:
We would appreciate an extension on the completion of our subdivision
agreement which is due in April.
As you know, the economy is still not condusive to our being able to
sell lots which would enable us to hire'a civil engineer for road
construction, etc. In fact, we are hoping to be able to pay taxes
on the lots within the next several weeks. At this point they are
delinquent.
Please let us know if there is anything further you need.
Sincerely,
Dolores M. Graybill
& John L. Grayb~ill
P.O. Box 670358
Chugiak, Alaska 99567
Phone: 688-9116 (home)
271-5015 (work)
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