642.6.6 -Super Silt Fence: Fence shall be in accordance with the latest specifications for Section 608: Right -of-Way Fence. The details shall be as shown in the latest version of the standards detail book: Standard Detail F4 (Sheet 1 of 2) except as noted below: Once sedimentation has reached half of the Super Silt Fence height, all accum ulated sediment shall be removed and disposed of as directed by the Engineer. The Contractor shall inspect all super silt fences after each rainfall event of at least 0.5 inches or greater. Any deficiencies or damage shall be repaired by the Contractor. If the Super Silt Fence is damaged or inadvertently moved during the sedimentation removal process, the contractor shall immediately replace and/or repair any Super Silt Fence after the damage occurs. The Contractor shall be responsible for all details, d evices, accessories and special construction necessary to properly furnish, install, adjust and place in continuous satisfactory service and complete the work in an acceptable manner. 642.7 -METHOD OF MEASUREMENT : The work will be measured for payment at the unit bid prices for the items specified in 642.9. Berms constructed prior to suspension of construction operations and slope drains will be measured in linear feet; sediment traps, sediment basins, and sediment removal will be measured by the cubic yard; for sediment basins, risers will be measured by the unit and conduit for principal spillway under the dam will be measured in linear feet and included under Item 642008 -*; seed will be measured by the pound; straw, hay and wood cellulose fiber mulch will be measured by the ton; fertilizer and agricultural limestone will be measured by the ton; matting will be measured by the square yard; contour ditching will be measured by the linear foot. Measurements will be made on the surface of the work done when applicable. Anchoring for mulch or other chemical binde rs will not be measured separately, but their cost shall be included in the unit price bid for mulch. Temporary pipe will be measured by the linear foot complete and in place. If the Contractor elects to utilize a series of small pipes in lieu of one lar ge pipe, measurement for payment will be made only for a length necessary to extend one conduit under the haul road or sediment basin. Berms constructed at the end of each day's operation will not be measured for payment but their cost shall be included in the unit bid price for Item 207001 -*, "Unclassified Excavation." Rock check dams will be measured by the unit. Inlet Protection and Dewatering Device will be paid per each device used. Wood chips or bark will be measured by the cubic yard. It is assumed that 17.5 cubic yards of chips or bark are equal to one ton of straw for seeding. Wood chips or bark mulch will be measured by the truck load or other loose volume measurement, and payment will be made on a one ton equivalent of straw for ea ch 17.5 cubic yards of wood chips or bark mulch. Quantities reseeded, refertilized, or remulched will be measured and included for payment. The bid price for fertilizer shall be based on 10 -20-10 ratio. When other ratios of fertilizer are used, pay quan tities will be determined using the following table: 565 Type of Fertilizer Actual Quantity Used Pounds Pay Quantity Pounds
5-10 5 100 50
8-16 8 100 80
10-20 10 100 100
12-24 12 100 120
15-30 15 100 150
When fertilizer ratios other than those shown above are used, the relationship between the pay quantity and the actual quantity used will be established by the Engineer. Silt fence will be measured by the linear foot at the bottom of the fence, excluding laps. Decomposed or ineffective fabric in the silt fence which is required to be replaced after six months from the installation date will be measured and paid for, however, such replacement prior to six months after installation will not be measured for payment. In the event that temporary er osion and pollution control measures are required due to the Contractor's negligence, carelessness, or failure to install permanent controls as a part of the work as scheduled, or as ordered by the Engineer, such work shall be performed by the Contractor a t their own expense. Temporary erosion and pollution control work required, which is not attributed to the Contractor's negligence, carelessness or failure to install permanent controls, shall be performed as ordered by the Engineer. Where the work to be performed is not attributed to the Contractor's negligence, carelessness or failure to install permanent controls and falls within the Specifications for a work item that has a contract price, the units of work will be paid for at the proper contract pric e. Should the work not be comparable to the project work under the applicable contract items, the Contractor shall perform the work in accordance with 104.3. In case of repeated failure on the part of the Contractor to control erosion, pollution, or siltation, the Engineer reserves the right to employ outside assistance or to use their own forces to provide the necessary corrective measures. Such incurred direct costs plus project engineering costs will be charged to the Contractor and appropriate deduct ions made from the Contractor's monthly progress estimate. Temporary pollution control may include construction work outside the right -of-way where such work is necessary as a result of roadway construction such as borrow pit and waste site operations, ha ul roads and equipment storage sites. Super Silt Fence will be measured by the linear foot complete and in place. 642.7.1 -Temporary Pollution Control, Unit’s Value Method: For “Temporary Pollution Control” for which a number of units are established i n the contract, will be measured by each temporary pollution control device used and accepted. Unless listed elsewhere within the Contract Documents, the relative value of each temporary pollution control device shall be calculated from the table poste d at: https://transportation.wv.gov/highways/TechnicalSupport/specifications/642.7UnitValueMet hod/Pages/default.aspx . The total units of temporary pollution control shown in the Contract is an estimated amount only and may be adjusted up or down by the Engineer in accordance with the project needs. 642.8 -BASIS OF PAYMENT : Except where provided for elsewhere in these specifications, the quantities determined as provided above, will be paid at the contract unit prices bid for the items listed below, which prices