2−38 sheeting or permanent steel sheeting is specified on the Plans or Special Provisions.
a.Steel Sheeting. If specifically called for on the Plans, the accepted quantities of "Temporary Steel Sheeting," “Temporary Steel Sheeting Abandoned in Plac e,” and/or "Permanent Steel Sheeting" will be paid for at their respective c ontract 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 driving, bracing, cutting and removal of excess quantities, removal of temporary steel sheeting, and all incidentals required to finish the work, complete and accepted by the Engineer.
b.Timber Sheeting. If specifically called for on the Plans, the accepted quantities of "Temporary Timber Sheeting" and/or "Permanent Timber Sheeting" 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 com pensation for all labor, materials, and equipment, including driving, bracing, cutting off, and removal in the case of temporary sheeting, and all incidentals required to finish the work, complete and accepted by the Engineer. 205.05.5 Bedding and Backfill Borrows. If specifically called for on the Plans, or if required to replace unsuitable materials, "Bedding and Backfill Borrows" will be paid for at their respective contract unit prices per cubic yard as listed in the Proposal. The prices so-stated constitute full and complete compensation for all labor, materials, and equipment and all incidental s required to finish the work, complete and accepted by the Engineer. If no such unit price is listed in the Proposal and if such material is required, then "Bedding and Backfill Borrows" will be paid for under the provision of Subsection 104.05; Extra Work , of these Specifications.
206.01 DESCRIPTION. This work consists of the provision of perimeter erosion controls 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. Perimeter erosion controls consist of the following four types.
206.01.1 Baled Hay Erosion Checks. Baled hay erosion checks shall consist of baled hay or
straw, each bale of which is embedded and attached to the ground with wood stakes, and are constructed as indicated on the Plans. 206.01.2 Silt Fence. Silt fencing shall consist of oak fence posts to which are attached industrial support netting and sediment control filter fabric, and are constructed as indicated on the Plans.
206.01.3 Baled Hay Erosion Check and Silt Fence Combined. Baled Hay Erosion Checks and
silt fence combined shall consist of baled hay erosion check installed abutting the filter fabric side of a silt fence, with a minimum of six (6) inches along the bottom edge of the silt fence toed in under the baled hay erosion check as indicated on the Plans. 2−39206.01.4 Compost Filter Sock. Compost filter sock shall consist of a flexible mesh tube filled with composted material and staked to the ground with wooden stakes, and constructed as indicated on the plans. 206.02 MATERIALS. 206.02.1 Baled Hay Erosion Checks. Baled hay or straw shall be baled within twelve months of use. Bindings shall be sufficiently strong to act as handles when placing bales in position by hand. The minimum dimension of any bale shall be 18 inches. Wood stakes shall be oak, 1-inch by 1-inch in section, and at least 3 feet in length. 206.02.2 Silt Fence. The filter fabric shall be a material suitable for erosion 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 4.5 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.
206.02.3 Baled Hay Erosion Check and Silt Fence Combined. Baled Hay or straw shall
conform to the requirements of Subsection 206.02.1 above. Silt fencing shall conform to the requirements of Subsection 206.02.2 above.
206.02.4 Compost Filter Sock. Compost filter sock material s hall be in accordance with AASHTO
Designation: MP 9-06 (2007 or latest revision). Compost filter material shall be in accordance with AASHTO Designation: MP 9-06 (2007 or latest revision). Compost material shall also meet all applicable Federal and State Regulations. For compost filter socks 18 inches or less in diameter, wooden stakes shall be 1 inch by 1 inch, at 10 foot intervals on center, and of a length that shall project into the soil 1 foot leaving 3 inches to 4 inches protruding above the filter sock. For compost filter socks greater than 18 inches in diameter wooden stakes shall be 2 inch by 2 inch, at 10 foot intervals on center, and of a length that shall project into the soil 1 foot leaving 3 inches to 4 inches protruding above the filter sock. 206.03 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. 206.03.1 Baled Hay Erosion Checks.
a.Installation. Baled hay erosion checks shall be constructed at the locations, and in accordance with the details indicated on the Plans, or as directed by the Engineer. The following stipulations also apply:
1.Bales shall be placed in a single row, lengthwise on the contour, with ends of adjacent bales tightly abutting one another.
2.The erosion check 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 ba ckfilled against the check. Backfill shall conform to the ground level on the downhill side and shall be built up to 4 inches against the uphill side.
3.The bales are to be installed so that the bindings are oriented around the sides of the 2−40 bales rather than along their tops and bottoms.
4.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.
5.The gaps between bales shall be chinked (filled by wedging) with straw to prevent water from escaping between bales. Loose straw shall be scattered over the area immediately uphill from the bale erosion check to increase efficiency.
6.At approximate intervals of 100 feet, one bale is to be placed against those bales positioned along the limit of clearing. This bale is to be placed at a right angle to the line of the toe of slope, all as indicated on the Plans.
b.Removal. All stakes must be removed from the haybales at a time designated by the Engineer. In general, the bales will be allowed to rot in place. If the Contract requires the haybales to be removed, they may be removed only when the adjacent exposed area has been stabilized, i.e., the area has an established grass or stone cover or has been paved, and is free from future uncontrolled discharges. Prior to such removal, however, all silt, mud, and debris entrapped by the haybales shall be removed and the area cleaned up in accordance with the applicable provisions of SECTION 212 of these Specifications. Immediately upon removal of the bales the remaining exposed areas (under the bales) will be backfilled, raked, and graded as necessary to match the surrounding grade and then seeded.
206.03.2 Silt Fence.
a.Installation. Silt fence shall be constructed at the locations, and in accordance with the details indicated on the Plans, or as directed by the Engineer. The following stipulations also apply:
1.A 6-inch deep by 1-foot wide minimum trench shall be dug where the fence is to be installed.
2.The fence shall be positioned in the trench with the fence posts set at 8 feet on center (maximum) in wetland areas and 4 feet on center (maximum) in wetland ravine, gully or drop-off areas, as indicated on the plans.
3.The sedimentation control fabric and the industrial netting shall be stapled to each post. When joints are necessary, filter fabric shall be spliced together only at support posts. Splices shall consist of a 6-inch overlap, and shall be securely sealed.
4.Each wood post with industrial support netting and filter fabric attached shall be driven into the undisturbed soil in the trench as indicated on the Plans.
5.The trench shall be backfilled and the soil compacted over the filter fabric.
6.The installed height of the fence shall be 2½ feet (minimum). However, height shall not exceed 36 inches since higher barriers impound volumes of water sufficient to cause failure of the fence structure.
b.Removal. This work will include the removal of the silt fence erosion checks and posts. Silt fence will not be left to rot in place. The silt fence may be removed only when the adjacent
Source: Rhode Island Standard Specifications (Bluebook), 2024 Edition. Pages 148–150 of 826.