422DRAINAGE FABRIC PROTECTION FOR CAST IN PLACE REINFORCED CONCRETE BOX CULVERTS

422.1 Description

This work consists of placement of drainage fabric protection around the outside of all cast in place reinforced concrete box culvert joints.

422.2 Materials

Drainage Fabric: Drainage Fabric will conform to Section 831, Type A.

422.3 Construction Requirements

Drainage fabric will be placed entirely around each joint in the box culvert barrel. The fabric will be placed to provide a minimum of 2 1/2 feet of fabric centered on the joint. Where required, transverse joints in the fabric will be overlapped a minimum of 2 feet. During bottom slab construction the fabric will be placed prior to concrete placement. Sufficient adhesive will be required along the edges of the fabric to hold it in place during backfilling.

422.4 Method of Measurement

Separate measurement will not be made.

422.5 Basis of Payment

Separate payment will not be made. The cost of providing drainage fabric will be incidental to other contract items. Page 294423 TEMPORARY WORKS

423.1 Description

This work consists of the design, construction, and subsequent removal of all temporary works including, but not limited to; falsework, formwork, cofferdams, work berms and platforms, temporary traffic and stream diversions, and temporary retaining structures.

423.2 MATERIALS (Not Specified)

423.3 Construction Requirements

A.Design of Temporary Works: The design of falsework, formwork, temporary retaining structures, and other related temporary works is the responsibility of the Contractor. The design will conform to the latest edition of the AASHTO "Guide Design Specification for Bridge Temporary Works." All temporary works in waters of the US are required to be covered in the Corp of Engineers 404 Permit. At the time of the preconstruction meeting, the Contractor will submit documentation for all temporary works for the purpose of complying with the 404 Permit requirements. The documentation will include at a minimum: 1.A written description of the proposed temporary works including types of materials to be used, how the temporary works will be installed, removed, and what portion, if any, will remain in place after construction; 2.Details showing approximate size and location of the temporary works. Details will include at a minimum, a plan view and a cross-section view of the temporary works. Details will provide sufficient dimensions such that the approximate size of the temporary works and location of the temporary works from a known point is shown; and, 3.Estimated quantities of all temporary fill material below the ordinary high water elevation. If the temporary fill is to be placed in a wetland, the estimated quantity will be the amount of temporary fill below the ordinary high water elevation and the amount of wetland loss (in acres). If during the course of construction there is a need for additional temporary works, the documentation will be submitted to the Engineer at that time. The Engineer will submit the documentation to the Corp of Engineers for approval. Construction of temporary works below the ordinary high water mark or in wetlands may not begin until Corps of Engineers approval is attained by the Engineer. B.Structure Falsework: 1.Substructure Falsework: Plans and design calculations for substructure falsework will be prepared by a Professional Engineer registered in the State of South Dakota. Falsework will be constructed in accordance with the falsework plans.