570Minor Drainage Structures for Detours

570.1 General Description

This work includes selecting, constructing, and maintaining minor structures used on detours for cross drains or side drains. Remove these structures when the detour is no longer needed. This Item covers only the use of minor structures. When the plans call for constructing, maintaining, and removing a detour bridge, apply Section 541.

570.1.01 Definitions

General Provisions 101 through 150.

570.1.02 Related References

A. Standard Specifications Section 541—Detour Bridges B. Referenced Documents AASHTO HS-15

570.1.03 Submittals

If using a bridge-type structure instead of one or more pipes, present plans of the proposed structure to the Engineer for approval before beginning construction.

570.2 Materials

All selected materials are subject to the following requirements: A. Bridge- Type Structure Ensure that each bridge-type structure roadway width is at least 2 ft. (600 mm) greater than the approach pavement width or 24 ft. (7.2 m), whichever is greater. Ensure that load capacity is equivalent to AASHTO HS-15. Provide suitable hub guards and handrails. B. Pipe Culvert Use pipe culverts long enough to accommodate the detour grade and cross section shown on the plans.

570.2.01 Delivery, Storage, and Handling

General Provisions 101 through 150.

570.3 Construction Requirements

570.3.01 Personnel

General Provisions 101 through 150.

570.3.02 Equipment

General Provisions 101 through 150.

570.3.03 Preparation

General Provisions 101 through 150.

570.3.04 Fabrication

General Provisions 101 through 150.

570.3.05 Construction

Have the Engineer approve selected construction methods. Use structures that have adequate openings and are suitable for the purpose intended. Unless otherwise modified by a special provision, provide for an uninterrupted flow of traffic over the existing highway or the completed detour, as the case may be. Assume all risks involved in the design, construction, maintenance, and removal of each structure, including any damage from any cause.

570.3.06 Quality Acceptance

General Provisions 101 through 150.

570.3.07 Contractor Warranty and Maintenance

General Provisions 101 through 150.

570.4 Measurement

The entire structure at the location specified is measured for payment. Multiple lines of pipe used instead of a bridge- type structure or a single larger diameter pipe is considered one structure.

570.4.01 Limits

General Provisions 101 through 150.

570.5 Payment

This Item will be paid for at the Lump Sum price bid for each structure. This price includes the materials, labor, equipment, and small tools necessary to construct, maintain, and remove the structure and to dispose of the materials. Upon removal, materials become the property of the Contractor. Sixty percent of the Lump Sum price will be paid when the structure is complete in place. The remaining 40 percent will be paid when the maintenance period is complete, the structure removed, and the materials disposed of. Payment will be made under: Item No. 570 Construct, maintain, and remove detour drainage structure no.___ Per lump sum

570.5.01 Adjustments

General Provisions 101 through 150.