R L Alia Company 12/7/2020 - Laserfiche WebLink

CITY OF EVERETT SPECIAL PROVISIONS loose and disturbed materials below pipe grade to undisturbed earth and recompact the material in accordance with Division 2. 8-31.3(5)C Control of Alignment and Grade Employ appropriate equipment and methods to attain the specified alignment and grade and to prevent over-mining or excessive jacking friction. Allowable grade deviations in horizontal and vertical alignments will be no greater than 0.2 feet per 100 feet in the vertical or horizontal direction over the length of the jacking and boring to a maximum deviation of 0.5 feet. Upon completion of installation of the steel casing, allow the Engineer to inspect the alignment and grade. If Engineer notes irregularities, then implement corrective measures to re-establish design grade and alignment of the carrier pipe. 8-31.3(6) Installation of Carrier Pipe Install carrier pipe in the casing pipe using heavy duty casing spacers at spacing not less than that recommended by spacing manufacturer. 8-31.3(7) End Seals Provide water and soil tight end seals using synthetic rubber sleeves. Attach one sleeve to the casing pipe at one end and another sleeve at the carrier pipe at the other end. Use stainless steel band clamps for attaching sleeves. 8-31.3(8) Subsurface Obstructions In preparing the Bid and planning and executing the boring and jacking work, assume that subsurface obstructions other than those shown on the Plans may be encountered during the Work. Be prepared to remove or otherwise address such obstructions at no additional cost to the City. In the event the Contractor, through diligent effort, is unable to advance the boring and jacking due to significant or impassable obstructions, Contractor may abandon the cased hole and Engineer may direct Contractor to either relocate the alignment or to terminate the boring and jacking effort. Failure to advance the boring and casing jacking due to adverse soil or groundwater conditions, mechanical failures, undersized equipment or inept operator actions will not be considered an impassable obstruction. 8-31.3(9) Jacking and Receiving Pits The access pit locations and sizes for the boring and jacking work are shown on the Plans for planning and bidding purposes and are not intended to be binding on the Contractor. The Contractor may utilize alternative locations and sizes for access pits to the extent the Work is accomplished without adding complications or cost. Minimize, to the extent possible, the number and size of access pits used for boring and jacking work. Detour vehicle traffic and pedestrians safely around access pits in accordance with approved traffic control plans. Use concrete barriers, fences, or steel plates as necessary for safety. Backfill access pits in accordance with the requirements defined for trench backfill. 8-31.4 Measurement Bid items of Work completed pursuant to the Contract Documents will be measured as described in Division B - Bid Item Descriptions and Section 1-09 MEASUREMENT AND PAYMENT of the Standard Specifications. 8-31.5 Payment Payment for Bid items of Work completed pursuant to the Contract Documents will be as described in Division B - Bid Item Descriptions and Section 1-09 MEASUREMENT AND PAYMENT of the Standard Specifications. Jackson Park Area Stormwater Separation September 2020 WO No. - UP3703 Division 8—MISC CONSTRUCTION SP-181