534CLEANING EXISTING DRAINAGE STRUCTURES

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CLEANING EXISTING DRAINAGE STRUCTURES

534.01Description

This Section shall cover the work of cleaning existing drainage structures including all types of pipes, reinforced box culverts, underdrain outlets and other drainage structures shown on the plans.

534.02Materials

There will be no material requirements other than the hardware cloth for the rodent screens on underdrain outlets shown on the plans.

534.03Construction Requirements

Pipes, box culverts, catch basins, manholes, drop inlets, pipe underdrain outlets and other drainage structures shown on the plans shall be cleaned of all dirt, leaves, limbs, roots, grass, sludge, grease, trash and other debris. Obstructions within a 5 foot distance outside of the inlet and outlet ends of the drainage structures shall also be removed as a part of cleaning the structures. All materials removed during cleaning shall be disposed off of the right-of-way in accordance with the requirements for disposal given in Section 206. The Contractor shall implement the "Best Management Practices" (BMP's) noted in Section 107 for the control of sediment that will be removed during the cleaning. The Contractor shall perform the work so that there is always adequate drainage of the roadway at all times. The Contractor shall repair all damage to drainage structures that result from cleaning methods and procedures that are used without consideration for the protection of the drainage system. The Engineer will not allow the use of any cleaning method or equipment that may result in damage to the structure or damage to the areas adjacent to the structure. Rodent screens shall be fabricated and installed as shown on the plans or as directed by the Engineer.

534.04Method of Measurement

The cleaning of existing pipes, box culverts, catch basins, manholes, drop inlets, pipe underdrain outlets and other drainage structures will be measured per each drainage structure or per foot along the length of the drainage structure. Measurement will be made only once for each item cleaned unless severe conditions result in the need for repeated cleaning and the repeated cleaning is not caused by the activities of the Contractor. All recleaning due to the activities of the Contractor shall be done at no additional cost to the Department. Pipes, culverts and other drainage structures measured for cleaning along the length of the structure will be classified for payment based on the horizontal opening of the drainage structure. The diameter of round pipe and the span of "span and rise" pipe will be shown as a horizontal opening classification for payment. Each pipe will be measured separately for payment regardless of the number of pipes adjacent to each other at one location. The horizontal opening of a culvert will also be shown as a classification for payment. The horizontal opening of a culvert shall be the horizontal opening in a single barrel culvert or the sum of the horizontal openings in a multiple barrel culvert. Two classifications of horizontal opening will be given for the purpose of measurement for payment. The first classification of horizontal opening shall be structures with an opening less than or equal to 48 inches. The second classification of horizontal opening shall be structures with an opening greater than 48 inches. If separate pay items are not shown on the plans for cleaning catch basins, manholes, and other appurtenances to the structures measured by linear feet (pipes and culverts), the cleaning of these appurtenances will be measured for payment by including the length through the appurtenances in the total number of linear feet of the attached drainage structure. The length through an appurtenance will be added to the length of the largest structure connected to the appurtenance. SIDE DRAIN PIPE 416

534.05Basis of Payment

The contract unit price for cleaning existing drainage structures shall be full compensation for all materials, tools and labor required for cleaning the structures, disposing of all materials that are removed from the structure and installing new rodent screens.

534-A Cleaning Pipe Underdrain Outlets - per each 534-B Cleaning Existing Catch Basin - per each 534-C Cleaning Existing Manhole - per each 534-D Cleaning Existing Drop Inlet - per each 534-E Cleaning Existing * (Less Than Or Equal To 48" Horizontal Opening) - per linear foot 534-F Cleaning Existing * (Greater Than 48" Horizontal Opening) - per linear foot * Pipe, Culvert, etc. SIDE DRAIN PIPE

535.01Description

This Section shall cover the work of furnishing and installing side drain pipe in conformity with these specifications. The word "pipe" in this Section shall include both round and arch pipe. It shall cover only those pipes specifically designated on the plans as side drain; it shall not apply to other pipes laid parallel to the roadway. The kind, type, and size of each side drain pipe will be shown on the plans or in the proposal. The location of each will be shown on the plans or designated. This Section shall include furnishing and constructing such joints and necessary cutting to provide connections to other drainage facilities, and other incidentals necessary for completion of the work.

535.02Materials

Materials furnished for use shall conform to the appropriate requirements of Division 800, Materials, with specific reference made to Sections 831, 846 and 851.

Side Drain SD Concrete PC for Plain Concrete Pipe RC for Reinforced Concrete Pipe Vitrified Clay VC Corrugated Metal CM for Plain Corrugated Metal CCM for Coated Corrugated Metal Corrugated Aluminum CA for Plain CCA for Coated Corrugated Steel CS for Plain CCS for Coated Plastic ABS for Acrylonitrile Butadiene Styrene HDPE for High Density Polyethylene PP for High Performance Polypropylene PVC for Polyvinyl Chloride

Provided a specific type of pipe is not specified by the plans or proposal, the Contractor will be permitted to install any of the optional types of pipe herein. Substitutions will only be allowed with hydraulically equivalent pipes. The hydraulic equivalence of optional types of pipes will be shown on the plans. Optional types of pipe shall meet the following criteria:  Diameters less than or equal to 24 inches {600 mm} – P.C.; V.C.; 16 gage {1.6 mm} C.M. with greater than or equal to 24 inches {600 mm} of cover, 14 gage {2.0 mm} CM with less than 24 inches {600 mm} cover; or P.V.C., A.B.S. or HDPE, or PP pipe (HDPE and PP