2−50 for the dewatering basin.
208.04 METHOD OF MEASUREMENT. "Dewatering Basins" and "Filter Fabric Retention Basins"
will be measured by the number of square feet of each such basin actually provided in accordance with the Plans and/or as directed by the Engineer. Area will be computed based on the outside dimensions of the basin enclosures. 208.05 BASIS OF PAYMENT. The accepted quantities of "Dewatering Basins" and "Filter Fabric Retention Basins" will be paid for at their respective contract unit prices per square foot as listed in the Proposal. The prices so-stated constitute full and complete compensation for all labor, materials, and equipment, including installation, subsequent removal, and restoration of basin areas, and all incidentals required to finish the work, complete and accepted by the Engineer. 208.05.1 Cleaning and Maintenance. The cleaning and maintenance of Dewatering Basins and Filter Fabric Retention Basins will be paid for under the provisions of SECTION 212; MAINTE- NANCE AND CLEANING OF EROSION AND POLLUTION CONTROLS.
209.01 DESCRIPTION. This work consists of the provision of temporary storm drain protection
facilities constructed in reasonably close conformity with the dimensions and details indicated on the Plans or as directed by the Engineer, all in accordance with these Specifications. Storm drain protection facilities consist of the following three types. 209.01.1 Sandbag Gutter Inlet Sediment Barrier. This work consists of placing a sandbag barrier upstream of a gutter inlet prior to the pl acement of roadway pavement. Sediment barriers shall be constructed as indicated on the Plans. 209.01.2 Silt Fence Catch Basin Inlet Protection. This work consists placing a temporary filter fabric fence around inlet grates. Silt fence inlet protection shall be constructed as indicated on the Plans. 209.01.3 Baled Hay Catch Basin Inlet Protection. This work consists of placing baled hay around catch basin inlets. Baled hay inlet protection shall be constructed as indicated on the Plans. 209.02 MATERIALS. 209.02.1 Sandbag Gutter Inlet Sediment Barrier. The sandbags and the sand material shall be of a quality acceptable to the Engineer. 209.02.2 Silt Fence Catch Basin Inlet Protection. The filter fabric shall be a material suitable for 2−51erosion control applications and shall be one of those included on the Department’s Approved Materials List. Wood posts shall be oak, 2-inch by 2-inch in section, and at least 4½ feet in length. Support netting shall be heavy-duty plastic mesh. For prefabricated silt fence, 1-inch by 1-inch wood posts will be permitted. 209.02.3 Baled Hay Catch Basin Inlet Protection. Baled hay or straw and wood stakes shall conform to the requirements of Subsection 206.02.1 of these Specifications.
209.03 CONSTRUCTION METHODS . Those erosion and pollution controls indicated on the Plans
shall be installed and approved by the Engineer before the commencement of any drainage, roadway, or bridge construction. 209.03.1 Sandbag Gutter Inlet Sediment Barrier.
a.Installation. Sandbag sediment barriers shall be constructed as indicated on the Plans. The following stipulations shall also apply:
1.The sandbags will be placed in a curved row extending from the curb or berm. The row shall be at least 6 feet upstream of the inlet and should overlap the curb or berm.
2.Place several layers of sandbags over the first layer to a height of at least 1 foot. The bags shall be overlayed and packed tightly together.
3.A gap of one sandbag should be left in the middle of the top row to serve as a spillway. The spillway shall be a least 8 inches high.
4.Additional sediment storage capacity can be obtained by constructing a series of these barriers along the gutter upstream of the inlet.
b.Removal. The sandbag sediment barrier will be removed prior to the completion of the project at a time designated by the Engineer. Prior to such removal, however, all silt, mud, and debris entrapped by the sediment barrier shall be removed and the area cleaned up in accordance with the applicable provisions of SECTION 212 of these Specifications.
209.03.2 Silt Fence Catch Basin Inlet Protection.
a.Installation. The silt fence inlet protection shall be constructed as indicated on the Plans. The following stipulations shall also apply:
1.Posts shall extend at least 1 foot below grade. 2. The filter fabric shall extend to a height at least 12 inches above the top of the inlet grate, but shall not exceed 3 feet in height.
3.The support netting shall extend to the full height of the filter fabric.
4.A trench shall be excavated approximately 6 inches wide and 6 inches deep around the outside perimeter of the stakes. The filter fabric and support netting shall extend at least 6 inches into the trench. After the fabric and support netting are fastened to the stakes the trench should be 2−52 backfilled and compacted to original grade.
5.The filter fabric and support netting fence shall be securely fastened to the stakes using heavy duty wire staples at least 1 inch long. Ends of the filter fabric must meet at a stake, be overlapped, folded and stapled to the stake.
b.Removal. The silt fence inlet protection shall be removed and the area prepared for pavement construction once the contributing drainage area is free from future uncontrolled discharges. Prior to such removal, however, all silt, mud, and debris entrapped by the silt fence shall be removed and the area cleaned up in accordance with the applicable provisions of SECTION 212 of these Specifications.
209.03.3 Baled Hay Catch Basin Inlet Protection.
a.Installation. The baled hay inlet protection shall be constructed as indicated on the Plans. The following stipulations shall also apply:
1.The bales shall be entrenched and backfilled. The trench shall be excavated the width of the bale and the length of the check to a minimum depth of 3 inches. After the bales are staked and chinked, the excavated soil shall be backfilled against the check. Backfill shall conform to the ground level on the inside and shall be built up to 4 inches around the outside.
2.The bales are to be installed so that the bindings are oriented around the sides of the bales rather than along their tops and bottoms.
3.Each bale shall be securely anchored by at least two stakes driven through the bale. The first stake in each bale should be driven toward the previously laid bale to force the bales together.
4.The gaps between bales shall be chinked (filled by wedging) with straw to prevent water from escaping between bales.
b.Removal. The baled hay inlet protection shall be removed and the area prepared for pavement construction the contributing drainage area is free from future uncontrolled discharges. Prior to such removal, however, all silt, mud, and debris entrapped by the baled hay shall be removed and the area cleaned up in accordance with the applicable provisions of SECTION 212 of these Specifications. 209.04 METHOD OF MEASUREMENT. 209.04.1 Sandbag Gutter Inlet Barrier. "Sandbag Gutter Inlet Sediment Barriers" will be measured by the number of sandbags actually prov ided in accordance with the Plans and/or as directed by the Engineer. 209.04.2 Silt Fence Catch Basin Inlet Protection. "Silt Fence Catch Basin Inlet Protection" will be measured by the number of linear feet of such protection actually installed in accordance with the Plans and/or as directed by the Engineer. 209.04.3 Baled Hay Catch Basin Inlet Protection. "Baled Hay Catch Basin Inlet Protection" will be measured by the number of linear feet of hay bal es actually installed in accordance with the 2−53Plans and/or as directed by the Engineer.
209.05 BASIS OF PAYMENT. 209.05.1 Sandbag Gutter Inlet Sediment Barriers. The accepted quantity of "Sandbag Gutter
Inlet Sediment Barriers" will be paid for at the contract unit price per each bag as listed in the Proposal. The price so-stated constitutes full and complete compensation for all labor, equipment and materials, including bags, sand, the subsequent removal of sandbags, and all incidentals required to finish the work, complete and accepted by the Engineer. 209.05.2 Silt Fence Catch Basin Inlet Protection. The accepted quantity of "Silt Fence Catch Basin Inlet Protection" will be paid for at the contract unit price per linear foot as listed in the Proposal. The price so-stated constitutes full and complete compensation for all labor, materials, and equipment including excavation, stakes, support netting, filter fabric, backfill, the subsequent removal of the entire temporary facility, and all in cidentals required to finish the work, complete and accepted by the Engineer. 209.05.3 Baled Hay Catch Basin Inlet Protection. The accepted quantity of "Baled Hay Catch Basin Inlet Protection" will be paid for at the contract unit price per linear foot as listed in the Proposal. The price so-stated constitutes full and complete compensation for all labor, materials, and equipment including excavation, haybales, stakes, backfill, the subsequent removal of the entire temporary facility, and all incidentals required to finish the work, complete and accepted by the Engineer. 209.05.4 Cleaning and Maintenance. The cleaning and maintenance of Sandbag Gutter Inlet Sediment Barriers, Silt Fence Catch Basin Inlet Protection, and Baled Hay Catch Basin Inlet Protection will be provided and paid for under the provisions of SECTION 212; MAINTENANCE AND CLEANING OF EROSION AND POLLUTION CONTROLS. SECTION 210 STILLING BASINS FOR WATER POLLUTION CONTROL
210.01 DESCRIPTION. This work consists of the provision of temporary and/or permanent stilling
basins in reasonably close conformity with the dimensions and details indicated on the Plans or as directed by the Engineer, all in accordance with these Specifications. 210.02 MATERIALS. The various materials required for the construction of stilling basins will be indicated on the Plans. 210.03 CONSTRUCTION METHODS. The stilling basins will be constructed in such a manner to allow any material which may cause a natural water course or the surrounding environment to be damaged to be retained in the basin. During the life of the Contract, the Contractor will be required to periodically clean the pool and to maintain the basin, both as directed by the Engineer. If the basin is temporary, the Contractor will be required to fill the basin with suitable material and to
Source: Rhode Island Standard Specifications (Bluebook), 2024 Edition. Pages 160–163 of 826.