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General Provisions (00100-00999)

704RECONSTRUCT CATCH BASINS AND MANHOLES

RI · 2024 Standard SpecificationsBook pages 319320View official source ↗

7−13vibratory compactor.

e.Outlets. Outlet pipes shall be placed in trenches with all ends securely jointed by methods recommended by the manufacturer of the particular type of pipe. After inspection and subsequent approval of the outlet pipe installation by the Engineer, the trench shall be backfilled with approved granular material. This material shall be placed in 12-inch layers and compacted with moderate compactive effort by use of approved vibratory equipment. 703.03.3 Unauthorized Excavation. If the bottom of any trench has been excavated below the grade indicated on the Plans, or as directed by the Engineer, it shall be brought back to grade by refilling with a well-compacted bedding material of a type selected by the Engineer. No payment will be made for unauthorized excava tion. Moreover, the Contractor shall furnish, place, and compact the bedding material used to refill the trench to grade at no additional cost to the State. 703.04 METHOD OF MEASUREMENT. "Underdrains" and "Combination Drains" of the various types and sizes indicated on the Plans, together with their respective outlets, will be measured in linear feet of continuous runs of such drains and outlets actually installed in accordance with the Plans and/or as directed by the Engineer. 703.05 BASIS OF PAYMENT. The accepted quantities of the various types and sizes of "Underdrains" and "Combination Drains" will be paid for at their respective contract unit prices per linear foot as listed in the Proposal. The prices so-stated constitute full and complete compensation for all labor, materials, and equipment for providing said underdrains and combination drains including all trench excavation (except Trench Excavation - Rock and Trench Rock Excavation/Mechanical), bedding, filter stone, filter fabric, placing and compacting backfill, and all incidentals required to finish the work, complete and accepted by the Engineer. "Trench Excavation - Rock" and "Trench Rock Excavation/Mechanical" will not be included in the contract unit prices for the various types of underdrains and combination drains but will be paid for separately as set forth in Subsection 205.05.1 of these Specifications.

704.01 DESCRIPTION . This work consists of reconstructing existing catch basins and manholes

in accordance with the dimensions and details indicated on the Plans or as directed by the Engineer, all in accordance with these Specifications. 704.02 MATERIALS. Materials used in reconstructing existing drainage structures shall conform to the requirements of Subsection 702.02.1; Masonry Unit Construction , of these Specifications. 7−14 704.03 CONSTRUCTION METHODS. Manholes and catch basins shall be reconstructed in the following sequence: First the structures shall be thoroughly cleaned. Next, the cast iron frames and covers (or grates) are carefully removed and stockpiled on the site for subsequent reuse. Then, the tops of the structure immediately below the castings are removed. Subsequently, a portion of the vertical walls of the structure is removed to a depth sufficient for the reconstructed unit to make the transition to the lines, grades, and dimensions indicated on the Plans, or as directed by the Engineer. Any excavation required around the existing drainage structure shall be carried out in such manner as to cause the least disturbance to both the surrounding area and those portions of the existing structure that are to remain. Actual reconstruction of the drainage structures shall then commence in accordance with the details indicated on the Plans or as directed by the Engineer. Construction methods to be employed in this effort shall conform to the applicable requirements as set forth in Subsection

702.03.1 of these Specifications.

704.04 METHOD OF MEASUREMENT. "Reconstruct Catch Basin and Manhole/Corbel Cones"

will be measured by the number of the tops of such units actually reconstructed. "Reconstruct Catch Basin and Manhole/Vertical Walls" will be measured by the vertical height in linear feet of drainage structure walls actually reconstructed in accordance with the Plans and/or as directed by the Engineer. 704.05 BASIS OF PAYMENT. The accepted quantity of "Reconstruct Catch Basin and Manhole/Corbel Cones" will be paid for at the contract unit price per each such cone as listed in the Proposal. The accepted quantity of "Reconstruct Catch Basin and Manhole/Vertical Walls" will be paid for at the contract unit price per vertical linear foot as listed in the Proposal. The prices so-stated constitute full and complete compensation for all labor, materials and equipment for reconstructing drainage structures including removing, stockpiling and resetting castings, excavation and backfill, examining and cleaning the existing basin before and after reconstruction, the legal disposal of all surplus excavated and/or unsuitable materials, and all incidentals required to finish the work, complete and accepted by the Engineer. SECTION 705 RECONSTRUCT EXISTING TYPE "D" CATCH BASIN TO CATCH BASIN WITH GUTTER INLET

705.01 DESCRIPTION. This work consists of reconstructing existing Type "D" catch basins, either

square or round, into catch basins with gutter inlet conforming to the details and at the locations indicated on the Plans, or as directed by the Engineer, all in accordance with these Specifications. 705.02 MATERIALS. Materials used in reconstructing existing Type "D" catch basins shall conform to the requirements of Subsection 702.02.1; Masonry Unit Construction , of these Specifications.

Source: Rhode Island Standard Specifications (Bluebook), 2024 Edition. Pages 319320 of 826.