HomeMy WebLinkAboutHAMPTON HILLS Soil Information
PHONE {907)
i}r, .!,crop/ Reid ~ Jr ~
Ipi_recLo;r' of ]zJ;aviroi]men'La]. Oua].i'h.y
3330 "C" S'h}i'eet;
f-,.l~chorage, Alaska 99503
S U_bO. 1V 1 r, 1 el
SJ_kjec'~: Ha'm.Dix)i'~ I]!L}_]s - '~" '"" '
19'/5
for OL~'SJ.t=o Sewer Sysfems
Dear Dr~ ReJ.d~,
Per mi~ d:i. scu;;sion,~; wi'lin, you and your s'i;aff~ On June I4
and 16r 'i975~we performed additonal soils i.n~esL;i, gation
work i~o deterred.ne v/h('.ther the ].o%s wiChJn P)amp~en Hills
Subdivi. sion have ~he required land. area and soil. to suppor'L
on.-siLe sewer absorpt;ion systems., Approv~iL was ob%aiDed
for aJ.1 loLs excepL T,o'b 10, for w]zich we failed to ge'b
pe.~'col!.abion reading during oL~r ini'hial
'l'ode_/ i ]:'eceived bhe re,qu]_ts of ~\he percolaL~.on [~es'L on
],Oi: '[0~ which ii.:'-, 20 mjnuhes/J~nch~ asau. s'~cto-r!7 '~ead]uc~
I have noLJ.fied hhe ]?lannJ. l~g Departzme.~rL that; sat.:Ls~ac',kory
soil t3esbs on alA ].o'13s have been. obtained .-i_i~ accordauce wi'Eh
Deparhmenh of Bnvironmental Qualihy requirements~ iti~
L.hey here any quesl;io~ls~ they wil.]. ¢:al]~ you~
I:L: you have an)/ question~ please do not hesi'La'he 'Lo cai]_
).cte iii }ppreciate your ta]d.n.g l;l~e c...me Eo review hhe
sksod.Lv..,.,, .On on
for l~his ~' ' '-~ ~ . s~:tch short
Very 'hru~J.y youzs~
7
Borough Assembly Mf,~E]NG D/IT~; April 25,. 1974
Borough Mayor SUB,IdFF£F.D BY: Environmental Quality
Soils Conditions and Water Availability In'Formation in 'the Area Around O'Malley
Road and Hillside Drive
Assembly Member Mary Frohne has asked that the Department of Environmental Quality
evaluate soil conditions and water availability in the neighborhood of O'Malley
Road and Hillside Drive, particularly Hampton Hills Subdivision and associated areas
for' Assembly consideration.
Tile soils information for the Hampton Hills Subdivision, which was'approved three
years ago indicates the soils have a high silt and clay content with random sandy
gravel pockets in some areas of the subdivision. The soil rating (see attached
'letter from Alaska Testlab dated September 10, 1971) indicates that the soils are
mainly 'From 225 to 250 square feet per bedroom on our rating scale. Soils rating
above 250 square feet are not recommended 'For use with on-site waste disposal systems.
It has been our experience in this area that sewer systems will have to be replaced
at least every five to seven years because of this type of .soil condition and because
it leads to clogging of the seepage area. :
Water availability in this area as reported by the United States Geological Survey
and our reports from well drillers and property owners indicates 'that wells can be
expected to produce in the neighborhood o'F one-half gallon per minute to five gallons
per minute, which is minimal for residential development. The Federal Housing Admin~
istration requires that an individual well produce five gallons per minute to meet
their approval.
At the present time, it would be our reco~nendation that in this area the property
be zoned R-9. R-9 creates the lower density necessary to protect both on-site wells
and sewer systems. Available data shows that, even on acre and a quarter lots with
greater than 60 percent development, public sewer will be necessary in order to alle-
viate sewer l~roblems. Acre and a quarter density development will also require that
public water be imported for domestic use in this area. Since public water and sewer
are not available in 'this area and not programmed for the immediate future, we feel
that the R-9 zoning is appropriate.
Respectfully submitted.,
Borough~ M~yor
Attachment
GREATER ANCHORAGE AREA BOROUC. H
Department of Environmental Quality
September 13, 1971
TO: Dick Glast)een
Plafmlng
FRO~
SUBJECT:
i~olf Strickland,
Assistan ~, D'i r,)ctor
Humpton Hills Subdivision
The e[)gine~ring firm on the subject project h~s provided this
Department uith ~l)gtneerJng r~PO~ts and 3oils tnforr~lation.
'3as~d upon our r~vl~.~w of this data .e reOom)))eF)d ,)pproval of
this subdivision ~s sUbu,'Jtt~d,
~ako[) RQdbird ~ ^s~sociate~
st
Redbird &Associates September 10, 1971
640 West 36thAvenue WO: 12045
Anchorage, -Alaska
SUBJECT: Soils exploration~Hills Subdivision
Gentlemen:
Enclosed are results of subject exploration -- 10 test holes unifonT, ly
over the siteo
Material is predominately silty sandy gravels (GM) or silty sands (SM).
These soils then per CJ~AB seepage requirements (cha.~ attached) are. in
the range of 225 'to 250 square feet per bedroom.
At 250 square feet per bedroom, the health department has recommended
personal consultation with respect to on-si~e disposal systems.
Test hole location sketch;sells information charts are also attached.
Sincerely,
/
P.E,
clw
. WATER LEVEL W ..... DATE~'~ ~- ~ STAI'~ON ,~z ~. ~ / ,,
HOLE NO .... ~ " " AD ...... DRILL TIME ~E ..... FN.._GR. COVER ...............
EI_E'V J / ~' '~, ~.,~ " " 24hr CAS/NS _ SIZE TECH ~-~z
FROST .... ~ / ~ ~'~ ........ PIEZOMETER YES NO DRILL USE'D ...~:_~?~_ DRIVER ~.._
STD. F'~'N.
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DATE Ce~T 197/ ~
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