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McCOMBS-KNUTSON ASSOCIATES, INC.
CONSULTING ENGINEEAS 8 LAND SURi IYORS Y SITE PLANNERS `
September 11, 1975
Mr. Mike Schiller
Building Inc.pEctor
City of Orono
P.O. Box 66
Crystal gay, Minnesota 55323
Subject: Percolation Tests
Lot 6, Johnson's Rearrangement of
Abbey's Long Lake Addition
Dear Mike:
We have reviewed the percolation tests submitted on the
sutject project, and it appears to be acceptable for the design
of a drainfield. We would, however. caution you that when
inspection is made of this to ascertain that it is constructed
with no core than the proper amount of slope across the drain -
field. The area is rather hilly and care will need to be ex-
ercised to insure that this is done properly.
If you have any further questions, please do not hesitate
to contcct us.
Very truly ycurs, I
McCOMBS-KNUTSON ASSOCIATES, INC.
Williah H. McCombs j
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I 12005 OLSON MEMOMAL HIGHWAY, MINNEAPOLIS. MINNESOTA 55441 TELEPHONE (612) 559.3700
I 36 NORTH MA114 STREET. HUTCIIINSON. MINNESOTA 55350 TELEPHONE 1612► 879-U )29
SOUTHWEST ENGINEERING DIVISION. MARSHALL. MINNESOTA 5(U5A Tf LEPHONF '507) 512 1820
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November S, 1974
545 Indian Mound
Wayzata Minnesota 55391
(612) 473-42'4 Soto
Raskob Construction
14816 County Road 6
Minneapolis, Minnesota 55441
Re: Percolation test - Orono
Dear Mr. Raskob:
On November 6 and 7, 1974 percolation tests were run on
Lot 6 of Johnston's rearrangement of Albee's Long Lake
Addition property in Orono at locations shown on the
enclosed sketch map.
Tests consisted of one soils boring to eight feet in
depth and six holes 24 to 36 inches in depth. Soils
encountered were: top soil, brown clay, brown sandy
clay, and red brown clay. No water was observed.
• Percolation rates averaged 26 minutes per inch. At
this rate the drain field required is 234 square feet
• for each proposed bedroom. Suggested alternate drain
field sites are shown. tie would recommend use of the
area southwest of the proposed house as the first
alternative.
Tho proposed primary drain Meld has its upper and east
side approximately two feet below the proposed house
whilatha lower end is apprr '-ely six feet below the
proposed house level.
The stated percolation rat n average of rates at
the locations shown and no —rantee is implied or
expressed that these conditYor,:; exist for the entire
proposed drain field area.
If we can be of further assls'anc., please advise.
Sincerely,
E. A. HIC(K�O�K AND ASSOCIATES
JL,,
lorin3n C. Wcnck, P.E.
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Enclosures
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I W
Scholler
McCombs
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ALLOWABLE LOADING RATES OF SOILS UNDER MOUNDS
M/ A � Allowable loading
rate
Ratio of
Percolation
, `
bosal width
S /Z
rate
min/in
to rock
gpd/ft2
in/day
am/day
layer width
g�
0.1 - 5
1.20
2.00
5.00
1.00
I,t—►
6 - 15
0.79
1.26
3.21
1.52
C07
16 - 30
0.60
0.96
2.44
2.00
i
31 - 45
0.50
0.80
2.03
2.40
46 - 60
61 - 120
0.45
0.24
0.72
0.38
1.83
0.98
2.6L _
5.00
teec-S 2_ MP I u si" C� �/L� & 0
eASAt
444-X
-p24-,w (pOO C-.PD
! s ? ?_U X
� � = >> Cl ('ou-fvb iti! L
L P2vP,fy3!'1
EARTH
OF VARIOUS
SIZED
CRAWLER
tttin u O A,,;
TRACTORSa
P16(,t-n,
CA, �/c(-�
/ 5 /'S�De::)
s.
Model
Weight,
Ground
Pressure on
Sof'ur.6
lbs
contact area,
ground,
sq. in.
lbs/sq. ft.
TD-25E
71,700
5,456
1,892
TD-20E
49,172
4,774
1,483
TD-20E LGP#
49,750
8,245
869
TD-15C
31,520
3,463
1,311
TD-15C LGP*
38,666
8,506
655
TD-12
28,000
2,912
1,385
TD-8E
17,150
2,393
1,032
TD-7E
13,900
2,)70
922
dInformation fr
ernational
Construction Equipment
Buyer's Guide, 1982.
;LGP means low ;,
pressure.
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