533STORM SEWERS

414

without extra compensation, except as herein provided. Whenever excavation is made for installing sewer pipe across private property, the topsoil disturbed by excavation operations shall be replaced as nearly as possible in its original position. Bedding, placing, and backfilling of storm sewers within roadway limits shall be as provided in

Compaction and density requirements shall meet that specified by Article 530.03. Ramming of material over, around, and to within 1 foot {300 mm} above the top of the sewer shall be done by careful use of approved mechanical tampers.

After completing the backfill, the Contractor shall immediately remove all surplus material, dirt, rubbish, and all tools and other equipment or material, leaving the entire site and the whole area involved in the construction operations in a neat and presentable condition. All pipe lines shall be thoroughly cleaned out prior to final acceptance.

P.V.C. HDPE, and PP pipe shall be tested for excessive deformation. The test shall be performed by the Contractor in the presence of the Engineer. Testing shall be conducted no fewer than 30 days after the completion of the compaction of all fill over the pipe. The Contractor shall conduct the test by pulling a nine point mandrel through the entire length of the pipe by hand. The mandrel shall meet the following requirements:  It shall be made of steel or aluminum;  It shall have an effective diameter of 95 % of the nominal inside diameter of the pipe;  It shall be at least as long as the diameter of the pipe;  It shall be fitted with pulling rings at each end;  It shall be stamped or engraved on some segment other than a runner with the pipe size and mandrel outside diameter. Prior to testing, the Contractor shall provide the Engineer with a proving ring to verify the mandrel size. The deformation is unacceptably excessive if the mandrel cannot be pulled through the pipe by hand without damaging the pipe. If the deformation is unacceptably excessive, the pipe shall be replaced without extra compensation. There will be no direct payment for testing.

533.04Method of Measurement

Storm sewer pipe, excavation, and foundation backfill will each be measured in the same manner as specified in Article 530.04.

533.05Basis of Payment

The accepted length of a storm sewer pipe, measured as specified above, will be paid for at the respective contract unit price for the sizes and types of pipe provided in the proposal, complete in place, which shall be payment in full for all materials, equipment, labor, and incidentals necessary to complete the work, except that excavation and backfill will be paid for as provided in Section 214.

533-A ___ inch {mm} Storm Sewer Pipe ( * ) - per linear foot {meter} 533-B ___ inch {mm} Span, ___ inch {mm} Rise Storm Sewer Pipe ( * ) - per linear foot {meter} * Show specific type, if required. Example: P.C. or V.C., or Class ____ R.C., or Class ____ C.S.L.C.S., or Class ____ C.S.L.C.A., C.S.F.C.S., C.S.F.C.A., or C.C.L.C.S. CLEANING EXISTING DRAINAGE STRUCTURES 415

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.