Kansas Administrative Regulations
Agency 5 - DEPARTMENT OF AGRICULTURE-DIVISION OF WATER RESOURCES
Article 40 - DESIGN OF EARTH DAMS
Section 5-40-43 - Cutoff trench
Universal Citation: KS Admin Regs 5-40-43
Current through Register Vol. 43, No. 39, September 26, 2024
(a) Each dam shall have a cutoff trench. The cutoff trench shall meet all of the following requirements:
(1) Have side slopes no steeper
than one horizontal unit to one vertical unit;
(2) have a bottom width of 10 or more feet as
necessary to meet the compaction requirements of K.A.R. 5-40-44;
(3) be constructed to the depth justified in
the design report based on the findings in the geotechnical report, unless
observations by the inspecting engineer during construction justify a different
depth;
(4) be backfilled with the
most impervious material available at the site. If no impervious material is
available at the site, then this material shall be procured off-site;
(5) be backfilled with material
that is contiguous to and homogeneous with the most impervious zone within the
dam, if the dam is designed as a zoned fill;
(6) be constructed in lifts that shall not
exceed nine inches for each lift; and
(7) be constructed of a material that has
been brought to acceptable moisture content.
(b) The material placed in the cutoff trench shall be placed according to the same specifications as those required for the embankment in K.A.R. 5-40-44.
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