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214.03 CONSTRUCTION METHODS . At least thirty (30) days prior to starting hydrodemolition
operations, the Contractor shall submit for the Engineer’s approval the proposed storage area and maintenance plan for the hydrodemolition runoff. The submission shall consist of two elements: the containment/sedimentation system and the maintenance procedures. 214.03.1 Containment System for Control of Hydrodemolition Runoff . If the project is within the jurisdiction of the Rhode Island Department of Environmental Management (RIDEM) or the Coastal Resources Management Council (CRMC), the containment system must be constructed in accordance with permit conditions and approved plans. Otherwise, the Contractor shall be responsible for obtaining the necessary approvals prior to beginning hydrodemolition activities. Copies of all such approvals shall be provided to the Department.
a.Minimum Requirements . The containment system shall meet the following minimum requirements:
1.It shall be one of the following structures:
a.An open basin formed of natural topography lined with an impermeable fabric.
b.An area where excavated material can be placed to form a temporary earth berm, lined with an impermeable fabric.
c.A manmade, portable structure which can be placed on-site for the duration of the hydrodemolition process.
2.The submittal shall consist of comput ations accompanied by the hydrodemolition equipment’s operating specifications, demonstrating that the sedimentation area is capable of holding the maximum discharge from eight (8) hour s of hydrodemolition operations and a minimum of three thousand (3,000) gallons.
3.The containment system sha ll be located within the available infield(s) of the project, and shall not encroach on the pedestrian or travel ways . The location of the fa cility shall be surrounded by a temporary snow fence to discourage unauthorized entry.
4.If disturbance of the original soil is required for the establishment of the containment system, a row of haybales shall be placed five (5) feet downslope from the edge of disturbance, and shall remain in place through the hydrodemolition process. Subsequent site restoration shall be required. 214.03.2 Maintenance and Dispo sal of Hydrodemolition Runoff . The Contractor shall develop a method by which the temporary sedimentation basin is to be maintained, cleaned and emptied prior to the start of any work. No work within areas of RIDEM or CRMC jurisdiction, or which is outside of approved limits of disturbance, will be authorized by the Engineer.
a.Requirements . The disposal of the liquid and solid discharge elements of the hydrodemolition operations shall conform to the following requirements:
1.The Contractor shall not commence hydrodemolition operations on a given workday until the containment system has been cleaned to the satisfaction of the Engineer.
2.Liquid runoff may be removed and discharged in accordance with RIDEM or CRMC 2−62 approval only after a settling period of not less than six (6) hours. Hydrodemolition runoff may not be discharged into any area of RIDEM or CRMC jurisdiction, or into any storm drain which outfalls to any such area, without prior approval of RIDEM or CRMC. The Contractor shall be responsible for obtaining all such approvals and forwarding copies to the Department. The water may not drain across unpaved surfaces, but shall be pumped, siphoned or conducted along a temporary paved waterway. Haybales shall be required for any pr ocess requiring disturbing earth or discharge over unpaved surfaces.
3.Any solid debris collected in the bottom of the basin shall be removed and legally disposed of by the Contractor.
b.Damaged Facilities . The Contractor shall be required to replace, rebuild or repair the basin, or any part thereof, which is damaged or other wise rendered inoperative to the extent that it does not perform its intended function, at no additional cost to the State. Such efforts include but are not limited to snow fence repair, structure repair, and maintaining haybales. 214.04 METHOD OF MEASUREMENT .
214.04.1 “Containment System for Control of Hy drodemolition Runoff” does not require a
measurement for a lump sum payment. 214.04.2 “Maintenance and Disposal of Hydrodemolit ion Runoff” will be measured by the number of days where actual hydrodemolition takes place in accordance with the Plans and/or as directed by the Engineer. 214.05 BASIS OF PAYMENT .
214.05.1 “Containment System for Control of Hy drodemolition Runoff” will be paid for at the
contract lump sum price as set forth in the Proposal. The price so-stated constitutes full compensation for establishing a suitable sedimentation basin for the hydrodemolition runoff, all materials, labor, tools, equipment, and earthwork associated with providing the basin, erosion control, snow fence, removal of all materials and restoration of all ground surfaces disturbed in the installation and operation of the system, and all incidentals necessary for the proper completion of the work specified and shown on the Plans, complete and accepted by the Engineer. 214.05.2 “Maintenance and Disposal of Hydrodemolition Runoff” will be paid for at the contract unit price per day as listed in the Proposal. The price so-stated constitutes full compensation for transportation and disposal of the hydrodemolition wast ewater, all materials, labor, tools, vehicles, any necessary permits and approvals required to complete the disposal, and all incidentals necessary for the proper completion of the work specified and shown on the Plans, complete and accepted by the Engineer. 3−1PART 300 AGGREGATE AND GRAVEL BASE AND SUBBASE COURSES SECTION 301 AGGREGATE AND GRAVEL BASE COURSES
301.01 DESCRIPTION. This work consists of providi ng one or more courses of graded aggregate
or gravel borrow and fillers, if required, on prepared subgrade surfaces in reasonable close conformity with the dimensions and details indicated on the Plans, all in accordance with these Specifications.
301.02 MATERIALS. The following materials shall conform to the applicable requirements of the
indicated Subsections of SECTION M; MATERIALS:
a.Gravel Borrow; Subsection M.01.09, Table I, Column I. b. Crushed Stone or Gravel; Subsection M.01.09, Table I, Column II. c. Fillers; Subsection M.01.08, Fine Aggregate. All materials shall conform to all applicable specification requirements prior to final placement on the project. The practice of culling deleterious or out of specification material after placement and/or grading in-place will not be allowed.
301.03 CONSTRUCTION METHODS. 301.03.1 Placing. If the required compacted depth of the base course exceeds 12 inches, the
base shall be constructed in two or more layers of approximate equal thickness. The maximum compacted thickness of any one layer shall not exceed 12 inches. The maximum size of stone in the gravel borrow or aggregate placed, shall not exceed 3/4ths of the depth of the layer after compaction. This restriction determines the maximum size of stone in the gravel borrow specification of Subsection M.01.09; Gradation of Aggregate .
301.03.2 Shaping and Compaction. Compaction of each layer shall continue until a density of
not less than 95 percent of the maximum densit y determined in accordance with AASHTO T180 has been achieved. The surface of each layer shall be maintained during the co mpaction operations in such a manner that a reasonable uniformity is produced. The compacted surface shall have a tolerance of ½-inch, plus-or-minus, to the grades shown on the Plans or as directed. However, no plus or minus deviation may continue for more than 100 feet in any direction. Field moisture content for Gravel Borrow shall be adjusted, if necessary, to be no greater than two percent (+2%) above the optimum moisture content.
301.04 METHOD OF MEASUREMENT. "Aggregate Base Course" and/or "Gravel Borrow Base
Course" will be measured by the number of cubic yard s or the number of tons, as the case may be,
Source: Rhode Island Standard Specifications (Bluebook), 2024 Edition. Pages 171–173 of 826.