HomeMy WebLinkAboutCherry Lane Golf Course Pond Liner.~ ~-~~
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April 16, 1980
Great Falls, MT
Billings, MT
Boise, ID
Pocatello, ID
Gillette, WY
Casper, WY
Tri-Cities, WA
J-U-B Engineers
212 10th Avenue South
Nampa, Idaho 83651
ATTENTION: Mr. Gary Smith, P.E.
Subject: Pond Liner, Cherry Lane
Village Golf Course
Meridian, Idaho
Gentlemen:
Specializing in:
• Geotechnical Engineering
• Quality Control of
Constructon
•Construction Observation
and Management
• Coal Analysis and Mining-
Related-Soils Analysis
• Chemical and
Environmental Consulting
Services
370 Benjamin Lane
This will confirm our conversations of April 15, 1980
concerning the use of silty clay materials for a
pond liner
at the Cherry Lane Village Golf Course. We have already
transmitted to you information pertaining to-the liner thick-
ness required to control seepage. This information was based
on permeability tests on selected samples of the material ob-
tained by our personnel. We understand that further questions
have been raised by the owner concernin
as opposed to bentonite or liypalon line9 materialsf tSomelay
concern has also bee expressed about the behavior of the
material during construction.
Based on the materials that we have tested, the proposed
clay liner material will restrict seepage from the proposed
pond equally as well as either a soil bentonite mixture or a
Hypalon liner assuming proper installation. The clay will be
slightly more difficult to install than a powdered bentonite
or the Hypalon, but we suspect the low cost of the clay will
offset this disadvantage as compared to the other two materials.
In regard to durability and weathering during the winter months,
the clay and the bentonite liner will behave in a similar manner.
There may be some minor surface cracking and fluffing as the
result of freeze-thaw cycles, but with a -liner_of sufficient
thickness, these phenomenon should not effect the integrity.
against seepage and may be easily repaired by slight grading
before the spring water season. ,
As we discussed, construction difficulties can be eased
and a conservative design achieved by placin the cla
one foot thick over the ent-ire g Y at least
of the clay must be very carefuPlydcontrolledlwithenc+n2epercent
of optimum moisture. Compaction should be accomplished with a
sheep's foot type roller after placing the cla
inch or one-foot thick lifts.- A Y In either six-
constructed at the start of clay placementttoedetermineuthebe
optimum lift thickness, which may depend on the size of the
size of the equipment used,-the optimum moisture content of
the clay and the type of soil on which the clay liner will be
• P.O. Box 7867 • Boise, Idaho 83707 •
208-377-21~
__ - ~
J-U-B Engineers
Nampa, Idaho
Northern Testing Laboratories
April 16, 1980
Page two
supported. It is essential for minimum seepage losses that the clay be
compacted to at least 95 percent of the maximum dry density as determined
by the standard proctor (ASTM D-698),
Because of the complexities involved in obtaining proper moisture con-
tent and density during placement of the clay, it is our opinion that full
time quality control observation and testing should be provided. We feel
this is the only way the owner can attain-the high quality liner he desires.
If you have any questions on the above, or if we may be of further
service in this matter, please contact us at your convenience.
Sincerely,
/~~
Steven A. Narkiewicz, P.E.
Area Geotechnical Engineer
SAN:crc