HomeMy WebLinkAboutHANSEN SAND LAKE ADDITION S-11570Hansen Scind
Lake Addition
5-11570
August 20, 2008
Municipality of Anchorage
Building Safety Division
On-Site Water and Wastewater Program
4700 Elmore Road
Anchorage, AK 99507
Attention: Dan Roth
Su~e~:
Hansen Sand Lake Subdivision, Lots 12A1 and 12A2
S-11570-1 ·
Water Availability Study
Dear Dan:
We have collected information on the wells on several lots surrounding the proposed Lot 12A
Hansen Sand Lake Subdivision to estimate the possible depths and production rates of a
future well to be constructed on Lot 12A2. Much of the surrounding area has AWWU sewer
and water so little information is available on wells. A Class C Well is currently on site on Lot
12A1 approximately 97' from the proposed well on Lot 12A2. The home to be constructed
on Lot 12A2 could connect to the existing water system on Lot 12A1 or a new private well
could be constructed. An 8" ductile iron sewer main currently fronts the lot and a new service
will be extended to Lot 12A2.
Wells studied vary in depth from 90' to 100' below the surface with casing the entire depth.
The static water level vades from 70' to 80' below the surface. Bedrock was not noted in any
of the wells with primarily sandy gravel and silt found at all locations. The wells are all lined
with 6" steel casing the entire depth with the pumping level near the bottom of the well. The
production rates noted on the well logs and flow tests varied from 2 to 10 gallons per minute
with the majority of the wells more than 6 gallons per minute.
In conclusion, it is highly likely the well to be constructed Lot 12A2 will be shallow and
probably less than 120' in depth, It will be constructed in unconsolidated soil formations and
require casing the entire depth. The production rate from the well will be between 2 and 8
gallons per minute.
· Lot t2A, Hansen Sand Lake Subdivision
August 20, 2008
Page 2
Actual water system production will depend on the size of the pump placed in the well and
the interior plumbing in the house. It is apparent, based on our study and the results
achieved on the wells surrounding this property that sufficient water is available for the
development of Lot 12A2, Hansen Sand Lake Subdivision.
Please let me know if you have further questions.
Sincerely,
Michael E. Anderson, P.E.
~'~"-1"'"'~'~'"..~:....~
8" DIP Sewer Main
WEST 74-TH AVE
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SITE PLAN
SCALE 1' = 50'
JE
HANSEN
SAND LAKE
SUBDIVISION
S-11570-1
08/20/08 12:56 FAX 9072697650 DEC DW&WW ~002
~AN-10-~ MON D4:45 ID; TEL NO: :, ~0:15
~j.~
Location (address of; Township, Range, & Se~ion, if l~%own; or dietmnoe fr~m main .road:
~x ~ '_.~.' _~ ~. .......... ' ~~:
, · , II
one) Opoa,ead ( ); gcresn ~;..Perfora[e~"'/ ..) ...... :' ~ .~, ..
Sc ' e Soreen or perforations. ~:
/~ ..2,f**% of drawdown from s~tio level.
me~rxs ...... ~ · .-: ......... ~. .......'_..'j.%.. · ........ i ....................
RUS-13-2008(WED) 12:30
LRN6 RND RSSOEIRTES
(FRX)9075Z~46~5
P. O07/O07
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Municipality of Anchorage
Development Services Department
On.Site Water & Wastswat~' Program
HEALTH AUTHORITY APPROVAL CHECKLIST
Legal De~dplton: HNCS~ S,~,ND I.N~E S/D; LOT 12~ Patrol ID:,
A, ~ DATA
We#type ~ IfA, a,m'Cpro,adePWS~l~ N/A,
Totaldep~ 74+ ft. Ca~dt~ 40+ It.
012-153-61
We, L~g (Y/N), NO
~.m~ pmm~y ~ (Yn~) YEs
c.~g ~ ¢.~m g.=um) 12:+
FROM W~J. LOG
AT INSPECTION
1/29/01
67 lt.
Date of ~mtlde: 1/29/01
SEFTtCMO~ nlNG TJU4K DATA
O.5 lag. A_
PUBLIC
AWWC, INC.
SEWER
MUNICIPALITY OF ANCHORAGE (MOA).
.7 ...~ HE',~LTH AUTHORITY APPROVAL (HAA)
~,ey .~,. ~'~ ~'i: CHECKLIST- FEBRUARY 1984
~) -..: ~. ~, ~ 2~-4720
~ ~- ~0 ~ ~al Descri~tion' Lo~ 12A~ ~ansea Sand Lake
~ ~%: ~'~?o' Su~"~., Se~2,'T12N, R4W, Cri8 2126
Well Cla~ification ~: ]~ ~ ': ..: ~ ~/~ I~A, B, C, D.~C. Approved (Y/N) ~ ~ --
Weft Log Pre~nt (Y/N) ~o Dine ~om~e~e~ ~ ~72 Y~el~ ]20 ~h ~
Total Depth ~ 00 ~ ~e~ ~o ~0 ~+ Dept~ of Grouting ' ~ 0 '
Static Water Levet
Casing Height Above Ground 2 '
Electrica! Wiring in Conduit (Y/N) Yes
Separation Distances from Well:
To Septic/Holding Tank on Lot .......
Pump Set At 90+
Sanitary Seal on .Casing {Y/N) Yes
DepresSion Around Wellhead (Y/N) ~o* 4.~
; On Adjoining Lots N/A .
To Nearest Public Sewer
To Nearest Sewer Service Line on Lot 50+
; Date 8/27/86 '-"'
To Nearest Edge of Absorption Field on Lot ...... ; On Adjoining Lots
To Nearest Public Sewer Line 120 ---+
Cleanout/Manhole 125+-' '
Water Sample Collected by N. t.indhol~.
· Water Sample Test Results Attached
Date Installed
Standpipes (Y/N) ,
Depression over Tank (Y/N)
Comments *Nine-foot deep reinforced concrete structure with wo0d-fra~ed roof houses
casin~ a~d conduit. Top of casin~ 2' above surrounding ground.
c. oncrete structure is drained.
SEPTIC/HOLDING TANK DATA
PUBLIC SElF. IR ~
Size ~-~ No. of Compartments
Air-tight Caps (Y/N)
Pumping/Maintenance Contract on File (Y/N)
Holding Tank High-Water Alarm (Y/N)
Separation Distances from Septic/Holding Tank:
To Water-Supply Well
To Property Line
To Water Main/Service Line
Course
Casing is welded and
Foundation Cleanout (Y/N)
Date Last Pumped
; for
Temporary Holding Tank Permit (Y/N)
To Building Foundation
To Disposal Field
To Stream, Pond, Lake, or Major Drainage
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