HomeMy WebLinkAbout1983-05-30 Site Evaluation Report.a
SITE EVALUATION REPORT
FOR WILLOW PROPERTIES
( GARY PETERSON )
OROSC, MINNESOTA
5-30-63
On Kay 4-30, 1963 six percolation holes were tested on
each of 10 lots and 3 soil borings taken on each lot as well
in accordance with the provisions of Individual Sewage Sys
tem Treatment Standards (WPC-40) adopted in 1976 by the Minn
esota Pollution Control Agency. In addition, other soil bor
ings were taken in lower areas to determine the possibility
of obtaining more than 10 loti but water tables were found
to be very high and ^;£he soils were found to be very slowly
permeable.
According to the soils maps and the information we
found in'the field, the higher areas had very good soils for
dralnfields while the lower areas and swales had extremely
poor soils for dralnfields. Thus, we tended to stick to the
higher areas while still leaving room for ample building
sites. However, once houses are proposed to be constructed
it mighc be desired to shift some of the drainfield areas.
Then n w testing would be required and it would be advise-
able to keep i;s high u? o:i the knCbr as was previously tes
ted.-.
Each site testeu w.nuld be ucoeptable for either a stan
dard or shallow trench drainfield system and is noted on the
attached drawing. It also night be necessary to use inter
ceptor drains to divert runoff water but this would be men-’
tioned in the system design for the Individual houses once
they are ready for construction. If any additional infoxTia-
tion is needed, please contact me.
Sincerely,
PERCOR, IKC.
'^Mark S. Gronberg, T.E
■ -j
Ipr 3
Hole No»
Percolation Results
Material Percolation Rate
F-l Brown Loam 15.0 Kin./In
F-2 Brown Sandy Loam 6.7 II
F-3 Brown Sandy Loam 10.0 It
P-4 Brown Sandy Loam 10.9 n
P-5 Brown Sandy Loam • 6.7 n
P-6 Brown Loam 13.3 It
The average percolation rate is lO.U minutes per inch.
Soil Borings
S.B. # 1
Depth(ft.)
0.0-0.3
0.3-3.6
3.6-5.5
5*5-8.0
Material
Mottled soil
table at 5.3
Black Loan
Yellow Brovm Loam
Brown Loam
Brown Clay Loam
at 5.0 feet and water
feet after 2k hours.
S.B. it 3
DegtMft.)
O.C-2.0
2.0-4.5
4.5-C.O
Mottled soi
water table
24 hours.
Material
Black Loam
Yellow Brown Loani
Brown Clay Loom
’^C3.6^feet and
------'feet after
S.B. #2
Depth(ft.)
0.0-0.5
0.5-4.0
4.0-8.0
Material
Black Loam
Brown Sandy Loam
Brown Clay Loam
Mottled soil at 4.5 feet and
water table at 4*5 feet after
24 hours.