SECTION 239 - TEMPORARY SLOPE DRAINS
239.01 Description. This work consists of furnishing materials for, constructing and
maintaining temporary slope drains, to include berms, pipe and riprap, as directed by the Engineer in accordance with the requirements shown on the plans and these specifications to control soil erosion and water pollution. Also, the work includes removing and disposing of the temporary slope drains. This temporary erosion control provision shall be coordinated with the permanent erosion control features to assure economical, e ffective and continuous erosion control throughout the construction period. Measurement and payment for temporary slope drains will be made only when a pay item is included in the bid schedule of the propo sal. The quantity is estimated for bidding purposes only and may vary depending upon actual construction requirements.
239.02 Materials. The temporary shoulder berm may be constructed from embankment
material. The temporary pipe shall be 8-inch minimum diameter and leak proof. The temporary riprap shall be hard, durable stones or broken concrete, angular in shape and shall be of sufficient size to prevent scour where installed.
239.03 Construction Requirements. Temporary slope drains shall be constructed at
the intervals and locations designated or deemed appropriate by the Contractor and approved by the Engineer for channeling runoff waters down embankment slopes and according to the requirements shown on the plans. Slope drains shall be adequately anchored to the slopes and their outlets constructed or placed to prevent erosion. Berms may be constructed from embankment material using the heel of a motor grader, bulldozer blade or other approved equipment and compacted using the wheels or tracks of same equipment. Riprap shall be placed in ac cordance with the plans where the pipe outlet location is subject to scour. The riprap may be end dumped. Pipe shall be placed in accordance with the plans and extended as required to coincide with the height of embankment by the end of each work day. Prior to the suspension of grading operatio ns each day, the Contractor shall shape the earthwork in a manner that will direct storm water runoff to the temporary slope drain installations. The temporary slope drains shall be operated and maintained by the Contractor in an acceptable functional condition until the slopes are protected with permanent erosion control measures. When the temporary erosion and pollution control installations are no longer required, the Contractor shall remove and dispose of all materials and restore the areas by establishing growth and coverage of vegetative items as required for the remainder of the project.
239.04 Method of Measurement. Temporary slope drains will be measured by the
linear foot of temporary pipe, which includes berms, riprap, and pipe including elbows or special sections. Measurement shall be alo ng the line and grade of the pipe installation from end to end along the centerline of the pipe installed and accepted. Temporary shoulder berms and temporary riprap will not be measured for separate payment. Their costs shall be included in the per linear foot price bid for temporary slope drains.
239.05 Basis of Payment. Temporary slope drains, measur ed as prescribed above, will
Temporary Slope Drains in other states
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