556 SECTION 641 MITIGATION DEVICES
641.1 -GENERAL : These devices include deflectors, weirs, random bolder placements, and rootball placements. These deflectors are to be built in accordance with the details contained in the plans and at the location as noted on the plans.
641.2 -PLACEMENT : Log deflectors and weirs are to be tied together as shown on the details or by a means approved by the Engineer. Double deflectors may be either log or rock and are indicated in the plans. The random boulder pl acements are to be sized in accordance with the data on the detail sheet. Placement of these boulders is to be such as to allow free movement of water through and around them. Rootball placements are to be as shown on the details contained within the pla ns. All the devices with the exception of the rootballs all other devices are to be placed in a manner that they raise above normal flow approximately 1 -2 feet, unless otherwise noted on the plans.
641.3 -BASIS OF PAYMENT : The payment for this work shall include all the materials, doing the work in a workmanlike and acceptable manner, labor, tools, equipment, supplies and incidentals necessary to complete the work and will be paid for at the Contract Unit Price Bid for the items below.
641.4 -PAY ITEMS : ITEM DESCRIPTION UNIT 641001 -* Deflector “type” Each 641002 -* Weir Each 641003 -* Random Boulder Placement Each 641004 -* Rootball Placement Each
* Sequence number
557 SECTION 642 TEMPORARY POLLUTION CONTROL
The Contractor shall exercise every reasonable precaution throughout the life of the project to control water pollution. Construction of permanent drainage facilities as well as performance of other contract work which will contribute to the control of si ltation shall be accomplished at the earliest practicable time during the life of the Contract. Pollutants such as chemicals, fuels, lubricants, bitumens, raw sewage, and other harmful waste shall not be discharged into or alongside of rivers, streams, im poundments (lakes, reservoirs, etc.) or into natural or manmade water courses leading thereto. The Contractor shall also comply with the applicable regulations of the Department of Natural Resources and other statues relating to the prevention and abateme nt of pollution. The purpose of these Specifications is to set forth certain temporary water pollution control measures which shall be required by the Contract in addition to the above.
642.1 -DESCRIPTION : This work shall consist of temporary control measures performed during the life of the Contract to control water pollution through use of berms, rock check dam, sediment structures (traps or basins), mulches, fiber mats, seeding slope drains, and other erosion control devices or construction methods, in accordance with these Specifications and in reasonably close conformity with the lines, grades, thickness and typical cross sections shown on the Plans or established by the Engineer. The temporary pollution control provisions contained shall be coordinated with the permanent erosion control features specified elsewhere in the Contract to the extent practical to keep total erosion control costs to a mi nimum. These provisions shall also apply to work conducted outside the project right -of-way, such as operations in a borrow pit or waste site, where such work occurs as a result of the construction of the project. These temporary water pollution control measures shall be continued until; permanent controls have been established; the need has been eliminated as determined by the Engineer; or the project has been accepted.
642.2 -MATERIALS : Materials will be considered acceptable when they are capable of accomplishing the intended purpose, do not in themselves contribute to pollution and comply with the following:
mater ial acceptable to the Engineer. Mulch materials shall be reasonably free of noxious weeds. Chemical mulch binders shall conform to the requirements in subsection
715.27.1
ii. Slope drains may be constructed of pipe, fiber mats, rubble, Portland cement concrete, bituminous concrete, or other material that will adequately control erosion and is acceptable to the Engineer. iii. Temporary seed, such as annual ryegrass (Italian ryegrass), weeping lovegrass, cereal rye or wheat, barley or oats, and mi llet, used in temporary seed mixture or seed mixtures B or D, shall be of a commercial grade meeting requirements of the State Seed Law, Temporary seed labeled with the notation "germination below standard" will not be acceptable for use on projects. Temp orary seed shall not be used on the project after one year from the date of germination test shown on the label. Seed other than that specified above shall meet the requirements of subsection 715.28.