HomeMy WebLinkAboutPrivate Road - 1983 No Address # SEPTIC SYSTEM INFORMATION
STREET ADDRESS
LOT BLOCK SUBDIVISION A4Db fTW'AJ
MONTH AND YEAR TESTING DONE
ITEMS ALREADY COMPLETED _ C<� f� C T 3 y'S ; = se,ice
NEED TO COMPLETE BEFORE ISSUING BUILDING PERMIT ;
OBORINGS
OPERC TESTS
SYSTEM DESIGN
SITE PLAN
O OTHER
T�
SUBDIVISION FILE NO.
DATE THIS SHEET FILED %��JJ BY /"� " .
SITE, FWALUA TION REPORT
'�`OR HARRISON R. JOHNST011 , JR.
(MONO, MINNF,30TA
10-22-80
During October 17-220 1980 all five proposed lots in the sub-
division of Harrison Johnston, Jr. were tested for the suitability
of supporting; on-site drainfield systems. Six percolation holes
were tested on each lot and three soil borings taken on each iot
to deteimiino both primary and alternate drainfield sites. the
percolation holes were dug 6 inches in diareter to the 4 foot depth
except the alternate site on lot 10 block 2 where holes 5-6 were
dug 2 feet deo -, to test for a shallow trench system. The holes were
dug with both pourer and hand augers.
"he soil borings were dug with hand augers and were 6 inches
in diameter to the 4 foot depth and 3 inches in diameter to the re-
r,:ainin- depth. Some very permeable soils were found on most lots
enc? all lot:; 'Pa(I sufficient percolation rates to qualify for stan-
dard drainfield systems. The alternate site on lot 1, block 1 will
require shallower trenches to avoid the water table. "i-Tie trenches
on the primary site of lot 19 block 3 will also need to be const-
ructed fairly shallow and an interceptor drain should be used to
divert runoff water from this site since the lot is bowl shaped
and coll,,cts runoff water.
Better soil was encountered shallower on the alternate site
of lot 1. , block 2 so shallow trenches should be used here. In lot
3 of block 1 a pump will probably be needed since the best soils
exist on ton of the hill.. It also might be necessary to use pumps
on other lots depending on t'r-j@ placement of the houses. Additional
design information for the individual houses will be needed prior
to construction. It is imperative that these tested area not be
disturbed since there are some steep sidehill slopes on some lots
e•
and some prohibitive soils and water tab ,. :: near tli- marshes which
may nreclude any other areas being used for drainfields.
If any additional information is needed, please► contact me.
JO 1143
JOHNSTON PROP:sRTY
O ,
BLOCK 1
Percolation Results
iiole ]io, Matorj al Percolation Rate
11-1 Coarse band 1.1 Min. /inch
P-2 Coarse Sand 1.0
V-3 Lt. Brn, rine Sand l. (
t'-4 Lt. Brn. Dine Sand 2.5
f -5 Coarse Sand 1.3
P-6 Lt. Brn. Iled. :>and 2.9
'I°rne av,-, percolation rate for holes 1-1i(prinary site ) = 1.6 1ipi.
The ave;. percolation r=ate for holes 5-6(alt, site ) _ 12.1 I.
Soil Borings
� .B. 1 1
Depth(ft. ) Material
0.0-1.0 Black Loam
1.0-2.0 Gray Brown Loam
Brown Medium Sand
3,5-6. 0 It. Brn. Medium wand
6.0-8.0 Lt. Gray Brn. Fine Sand
No mottled soil or water table after 24 hours.
3.B. 2
�e-pth(ft, ) 1 aterial
0. J-1. 2 Black Loam
1. 2-1.5 Hard Brown Clay
1.5-1.7 Brown Clay Loam
1.7-3.0 Brown Loam
3.0-3, 6 Brown Medium Sand
3. 8-5. 0 Lt. Brown Fine Sand
5.0-6.5 Coarse Sand( Rock encountered)
ito mottled soil or water table after 24 hours.
B. 3
Denth(ft. ) I-laterial
Black Loam 5. 5-8. 0 Gray Brn. Coarse Send
1. 3-2.6 Brown Clay Loam pjo mottled soil or water table
2.6-3. 7 Brown Loam after 24 hours.
? 7- � '; Brown Medium Sand
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TO: Jeanne Mabusth, Zoning Administrator
FROM: Michael Gaffron, On-Site Systems Manager
DATE: October 30, 1930
SUBJECT: #582 H. R. Johnston, 925 Willow Drive South - SUBDIVISION
On-Site Systems Review
On October 28 , 1980 , I reviewed the five proposed new building sites
for the above referenced subdivision as per the attached survey.
Each lot (save Lot 4 , Block 1 with existing house) appears to have
2. 0 acres of dry buildable land. However, due to proximity to adjacent
wetlands and the accompanying water table a portion of each lot is
unsuitable for use as drainfield. All lots had areas tested which meet
the requirements for standard trench drainfield systems . These designated
tested drainfield areas on certain lots are the only available acceptable
sites for drainfield. In every case, assuming a long terra water table
exists at approximately the 930 ' elevation, no drainfield trenches
(2 ' depth standard) should be allowed below elevation 935 ' in order to
ensure a 3 ' separation between trench bottoms and water table. In
addition, where individual lot testing indicates a water table depth,
the above 3' separation must be adhered to. Following is a detailed
review of each lot.
Lot 1, Block 1
Testing indicates soil and water table conditions are suitable for a
standard trench drainfield system. This lot has some alternate house
location possibilities. However, the tested site and in fact the entire
lot should be left undisturbed until a final house location is determined.
Lot 2 , Block 1
As in Lot 1, testing found sandy soils suitable for a standard drainfield
system. Various house locations may be possible. An excavation crossing
the lot has not severely damaged drainfield areas, but no further excavation
or disturbance should be allowed until final house location is determined.
women
Lot 3, Block 1
This is probably the most critical lot of the subdivision in that a limited
area is available for use as drainfield. The tested area is at the highest
point of the lot due to extreme slopes. An excavation near the northwest
corner of the lot may have affected the extent of the area available for
drainfield. By creating an outlet for sidehill seepage from trenches above
the excavation. However, due to the extremely fast percolation rates and
sandy soils and the existence of untested but probably suitable area for
drainfield to the east on the lot, the effect of this excavation is only
slight.
,x
October 30, 1980
#582 H.R. Johnston
925 Willow Drive South
Page 2
Lot 3, Block 1 (Cont. )
When this lot is developed, care must be taken to make sure the house
location does not encroach on the area to be preserved for drainfield.
I suggest that for this lot (and for all subdivisions in the City) that
the tested drainfield sites be somehow entered on the title or deed for
the property so that prospective buyers are made aware of the restrictions
on the lot.
Lot 4 , Block 1
This lot contains the existing H. R. Johnston home. Although the lot
as proposed contains only 1. 64 acres, adequate area has been Previously
tested and exists for use as future drainfield. A relocation of the lot
line between Lots 3 and 4 to give each property approximately 1. 8 acres
would serve no purpose as far as drainfield sites are concerned.
Lot 1, Block 2
The soils on this lot are considerably different than those of the
westerly lots. Loam and clay loam soils are indicated, and the percolation
rates were understandably slower. This lot contains 2 . 4 acres and has a
somewhat limited number of possible house locations which would allow a
gravity-flow drainfield system. The lot is acceptable for a standard
trench drainfield. Care must be taken during development of the lot
that drainfield trenches are kept away from the pothole in the center
of the lot.
Lot 1 , Block 3
This lot has loamy soils with a fairly good percolation rate. The tested
drainfield sites are to the immediate southwest of the existing paved
driveway and due to slope conditions appear to be the only likely sites
for use as drainfield. Again, care must be taken to preclude disruption
of these sites prior to development. It appears that the suggested location
of the house would be on the north end of the lot approximately on the
existing driveway.
Summary
Each of the five proposed new lots should be acceptable for standard trench
drainfield systems. Fortunately, this is one of the few areas of Orono
having sandier soils. Certain lots as indicated may have limiting sites
due to water table and slope constraints. As the engineer ' s report states,
it is imperative that the tested sites not be disturbed by further
excavation, grading or filling until permits are issued for specific
house locations . I recommend approval of the subdivision as per preliminary
plan with the above recommendations .
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Date: March 28 , 1983
OFFICIAL NOTICE OF PRIVATE ROAD NAME
Road Name : French Lake Road File No . qg2 —
Post Office : Wayzata Fire Department: Long Lake School District: Oro,
Location: (see attached map)
911 information - Series 2100 - 2500 East-west grid
Status : Existing Road (Former Name )
New Road: completed under construction
Public Street to be accepted
XXX Private Road to be maintained and serviced by the property
owners and/or hom'oowner' s association. The City of Orono
has no obligation or intention to acquire or open this
road as a public street
Addresses:
Lot 1, Block 3 , Johnston ' s French Lake 2nd Addition - 2195 French Lake Road
Lot 1, Johnston ' s French Lake (formerly 925 Willow Drive) 2245 French Lake Rd.
Lot 1, Block 2 , Johnston ' s French Lake 2nd Addition 2250 French Lake Road
Lot 4 , Block 1, Johnston ' s French Lake 2nd Addition - (formerly 935 Willow
Drive) -- 2285 French Lake Road
Lot 3 , Block 1, Johnston ' s French Lake 2nd Addition - 2355 French Lake Road
Lot 2 , Block 1 , Johnston ' s French Lake 2nd Addition - 2375 French Lake Road
Lot 1, Block 1 , Johnston ' s French Lake 2nd Addition - 2465 French Lake Road
Please change all records to the new names and numbers.
Sincerely,
Jeanne A. Mabusth
Zoning Administrator
,TAM: dh
cc: Property Owners, Post Office, Fire Dept. , School Dist. , Orono Police
Dept. , Orono City Depts. , NSP (Excelsior) , Minnegasco, N.W. Bell (Wayzata) ,
Hennepin County Finance Department, Hennepin County Sheriffs Radio
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