HomeMy WebLinkAboutVALLEY HAVEN S12661Onsite File
A L L
AN Alk A&
rIAVE
March. 1, 2023
Municipalities of Anchorage
On -Site Water and Waste Water Section
4700 Elmore Rd
Anchorage, Alaska
Phone 343-7904
Re: Proposed Benson Subd. Lots 1 & 2 Soils and Nitrite Report
Legal: East 495' of NE'/ of NE Y4, Section 17, T14N, R1W, SM, Alaska
To Whom it may concern:
The letter is to answer the questions concerning the possible On-site septic design on the
above referenced new subdivision. Lot 2 has an existing septic system which was
installed in 1985. The soils log from the septic installation showed well graded sand (SW)
for the entire sixteen -foot depth. A new test hole was completed and found poorly graded
gravels with sand (GP) for the entire sixteen -foot depth. No water was observed during
excavation of after the 7 -day monitoring period. The perc rate was measured at 2 minutes
per inch.
A new test hole was completed on the proposed new lot 1 and found poorly graded sand
(SP) for the entire depth with no water observed during excavation of after the 7 -day
monitoring period. The perc rate for lot 1 was 2 minutes per inch, the same as lot 2.
The new proposed lots (1&2) are large (five acre plus) and will support a single-family
residence, see the attached site plan. All of the surrounding wells have been located to
verify that the new lots will not impact the neighboring lots. All of the known wells also
show the total depth and flow rates if this data was available on the MOA web site. The
average flow rates vary between 4 and 50 gallons per minute and the depth is 86 to 221
feet deep. A review of the MOA nitrate map for the area shows low levels on all of the
surrounding properties. Nothing above 2.0 mg/L.
The soils and well flows are good and will support an on-site septic and well system for
this new proposed subdivision. Please call me with any questions or comments
concerning this proposal.
Sincerely,
Michael N. Anderson, P.E.
4661 Natrona Ave.
Anchorage, Alaska 99516
Phone 727/8864
Municipality of Anchorage
Development Services Department
On -Site Water and Wastewater Section 0�I
4700 Elmore St. : ` 9 7 M •° ``, ¢ t
P.O. Sox 196650 Anchorage, AK 99519-6650 ........
www.muni.org/onsite , .. , . ......... _'
(907) 343 79Q4,MICHA[L N. ANDERSON 4
EI,CE - 9d 9 •` `�Y
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Soils Log - Percolation Test t°Ea •'•ft �. • • • ���,�
Performed For: t f fs onn -.0 t Date Performed:
L on`..`' L,t9 �i. �'rsOs t 5/C{. , Township, Range, Section:
Slope Site Plan
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1-
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7- -50
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WAS GROUND WATER
9- ENCOUNTERED?
10- IF YES, AT WHAT DEPTH?
Depth to Water Atter
11- Monitoring? r(
12- Date:
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COMMENTS f { {%[ r , ,.�-1) r jl,- ,c
PERFORMED BY: I CERTIFY THAT THIS TEST WAS
PERFORMED IN ACCORDANCE WITH ALLSTATE AND MUNICIPAL GUIDELINES IN EFFECT ON THIS DATE. DATE:
Municipality of Anchorage
Development Services Department
On -Site Water and Wastewater Section
4700 Elmore St.
P.O. Box 196650 Anchorage, AK 99519-6650
www.muni.org/onsite
(907)343-7904
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CE- 9469 .dv
Soils Log Percolation Test
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Performed For: eh y 0,7r Date Performed: 7
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Slope Site Plan
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COMMENTS
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Net Time
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IF YES, AT WHAT DEPTH?
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PERFORMER BY: M jam}, i CERTIFY THAT THIS TEST WAS
PERFORMED IN ACCORDANCE WITH ALLSTATE AND MUNICIPAL GUIDELINES IN EFFECT ON THIS DATE. DATE:
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JOHNSON HEIGHTS
I PHASES 2, LOTT11
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JOHNSON HEIGHTS
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JOHNSON HEIGHTS
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-EAGLE RIVER ROAD- -��
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EXISTING WELL
DEPTH
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T14N1R W
SECTION 17
SE4 NE4 PTN
EXISTING WELL
/ 165' DEEP, 5
/ GPM, NO
rt ' NITRATE DATA
` EXISTING WELL
LJ 82' DEEP, 3.2
PROPOSED GPM,
/ WELL LOCATION NITRATE
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T14N R1 W / NITRATE DATA
SECTION
1111/ 111111 1 /1S2 NE4
1 11 I I I
C1 PROPOSED WELL/SOILS LAYOUT
MICHAEL N. ANDERS(
No. CE 9469
;•.,2-15-23
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T14N1R W
SECTION 17
SE4 NE4 PTN
EXISTING WELL
/ 165' DEEP, 5
/ GPM, NO
rt ' NITRATE DATA
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LJ 82' DEEP, 3.2
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SECTION
1111/ 111111 1 /1S2 NE4
1 11 I I I
C1 PROPOSED WELL/SOILS LAYOUT
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No. CE 9469
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