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General Provisions (00100-00999)

236Temporary Silt Basins

MS · 2017 Standard SpecificationsBook pages 199199View official source ↗

Section 235 Section 235 After securing in place, a sufficient quantity of the excavated material shall be placed around the erosion check and comp acted to prevent undermining.

235.03.2 Maintenance and Removal . The Contractor shall maintain the erosion checks

and remove and dispose of silt accumulations as directed by the Engineer. When the erosion checks are no longer needed , they shall be removed and the Contractor shall dispose of silt accumulations and treat the disturbed areas in accordance with the contract requirements. 235.04--Method of Measurement . Erosion check will be measured per each by actual count of the total bales used in constructing, replacing and maintaining the erosion checks.

235.05 Basis of Payment . Erosion check, measured as prescribed above, will be paid

for at the contract unit price per each, wh ich price shall be full compensation for completing, maintaining and removal of the erosion checks and the removal and disposal of silt accumulations. Payment will be made under: 235-A: Temporary Erosion Check - per each SECTION 236 - TEMPORARY SILT BASINS

236.01 Description . This work shall consist of excavation and satisfactory disposal of

all materials excavated in the construction, clean out, and maintenance of silt basins. This work may also consist of maintenance and removal of existing silt basins constructed on previous projects. The Contractor shall construct earth dikes and overflow spillways, furnish and install outfall pipe, perforated elbows, perforated ri sers, and trash racks in silt basins where shown on the plans or as directed by the Engineer. The quantity of silt basins to be placed will be affected by the actual conditions that occur during the construction of the project. It is understood that measurement and payment for silt basins will be made only when shown on the plans or ordered by the Engineer, and a pay item is included in the bid schedule of the proposal. The quantity is es timated for bidding purposes only and will be dependent upon actual needs during construction of the project.

236.02 Blank .

236.03 Construction Requirements.

236.03.1 General. The Contractor shall excavate silt basins to the dimensions and at the

locations shown on the plans or as directed by the Engineer. The silt basins, new or existing, shall be cleaned out as frequently as necessary to have at least 50% of the basin capacity available at all times. The silt basins shall be completely cleaned out and the slopes shaped and dressed for seeding and mulching prior to completion of the project unless otherwise directed by the Engineer. Grassing shall be done in accordance with the provisions contained in the contract for the roadway and will not be measured as a separate item.

236.03.2 Maintenance and Removal. The silt basins shall be maintained so they will

function properly until the Contractor is released from maintenance, all as determined by the Engineer. All excavated materials shall be utilized in the construction of basins or roadway embankments except where otherwise directed by the Engineer. Materials not used shall be disposed of as directed by the Engineer. Upon removal of a silt basin, the pipe, elbows, risers and trash racks may be used at other locations provided they are in condition acceptable to the Engi neer. Pipe, elbows, risers and trash racks will become the property of the Department upon completion of the project.

236.04 Method of Measurement . Silt basin will be measured per each. Once a silt

basin has been constructed, it shall be paid for at the unit price per each. Maintenance and removal of existing silt ba sin will be measured per each. Once an existing silt basin has been cleaned out, it sh all be paid for at the unit price per each. Additional clean outs or maintenance may need to be performed on that silt basin throughout the length of the project.

236.05 Basis of Payment . Silt basin will be paid for at the contract unit price per each,

which price shall be full compensation for construction, maintaining, removal unless noted otherwise, grassing and any other work required to make the basin function. Maintenance and removal of existing silt basin will be paid for at the contract unit price per each, which price shall be full compensati on for maintaining, removal, grassing and any other work required to complete the work. Payment will be made under: 236-A: Silt Basin, Type - per each 236-B: Maintenance and Removal of Existing Silt Basin * - per each * Type may be specified SECTION 237 - WATTLES

237.01 Description . This work consists of furnishing, constructing and maintaining

wattles for the retention of soil around inlets, swale areas, small ditches, sediment basins and other areas as necessary. Also, the work includes removing and disposing of the wattles and silt accumulations. Measurement and payment for wattles will be made only when a pay item is included in the bid schedule of the proposal. The quantity is estimated for bidding purposes only and will be dependent upon actual conditions that occur during construction of the project.

Source: Mississippi Standard Specifications for Road and Bridge Construction, 2017 Edition. Pages 199199 of 1,113.