310 — CONCRETE SLOPE AND CHANNEL PROTECTION 2026 STANDARD SPECIFICATIONS FOR CONSTRUCTION AND MATERIALS CATEGORY 300 DRAINAGE SECTION 310 — CONCRETE SLOPE AND CHANNEL PROTECTION
310.01 Description
Protect slopes and channels with cast in place concrete and cutoff walls.
310.02 Materials
Crusher Run Aggregate CR-6 901.01 No. 57 Aggregate 901.01 Curing Materials 902.07 Form Release Compound 902.08 Portland Cement Concrete 902.10, Mix No. 2 Welded Steel Wire Fabric 908.05 Joint Sealer 911.01 Preformed Joint Fillers 911.02 Roofing Paper 911.07 Borrow Section 916
310.03 Construction
310.03.01 Excavation. Excavate, including excavation for cutoff walls, as specified in
310.03.02 Cast In Place Concrete. Construct cast in place concrete slope protection in alternate
strips so that construction joints are all in one direction and that tooled joints run perpendicular to the construction joints. The result shall be a checkerboard pattern having squares of at least 3 ft but not more than 5 ft. The Engineer will determine the size of the squares and the size of squares around curved surfaces. Construct joints and cutoff walls as specified.
310.03.03 Forms. As specified in Section 603.
310.03.04 Concreting. Mix concrete as specified in 915.03.04. Volumetric batching and
continuous mixing will be permitted. Prior to placing the concrete, use acceptable methods to dewater areas that are subject to the infiltration of water. Spread and tamp, or otherwise 310 — CONCRETE SLOPE AND CHANNEL PROTECTION 2026 STANDARD SPECIFICATIONS FOR CONSTRUCTION AND MATERIALS consolidate the concrete. Strike it off with an approved screed and give the surface a broomed finish. Do not plaster the surface. Use a 1/4 in. edging tool on all edges and joints.
310.03.05 Cold Weather Construction and Curing. Refer to 520.03.02 and 520.03.12
respectively.
310.03.06 Backfill. After removing the forms, place and compact the backfill.
310.04 Measurement and Payment
The payment will be full compensation for all concrete, forms, excavation, curing, joint sealer and filler, backfill, compaction, disposal of excess or unsuitable material, and for all material, labor, equipment, tools, and incidentals necessary to complete the work.
310.04.01 Concrete Slope and Channel Protection and Concrete Slope Protection for Streams will
be measured and paid for at the Contract unit price per square yard of finished surface.
310.04.02 Cutoff Walls will be measured and paid for at the Contract unit price per linear foot.
310.04.03 The removal and disposal of unsuitable material below the subgrade will be measured
and paid for at the Contract unit price per cubic yard for Class 2 Excavation.
310.04.04 When Borrow or Selected Backfill using No. 57 Aggregate or Selected Backfill using
Crusher Run Aggregate CR-6 is approved by the Engineer as replacement material for the Class 2 Excavation, it will be measured and paid for at the Contract unit price per cubic yard for the pertinent item specified in the Contract Documents.
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