Interwest Construction Inc 2/8/2019

CITY OF EVERETT SPECIAL PROVISIONS Core drill for pipe connections less than 28-inch O.D. Line drill or wall saw an opening for pipe connection greater than 28-inch O.D.to accommodate the size of pipe to be inserted. Interconnect drilled holes where line drilling is the method used. Use a small core drill to accomplish line drilling. Jackhammer or rotary hammer shall not be used. For line drilling provide minimum 1-inch and maximum 2-inch clearance around the circumference of the pipe. Core drill opening to accept a watertight flexible pipe to manhole connection in accordance with manufacturer's recommendations. Place upstream pipes, except PVC and HDPE pipe, penetrating the manhole walls with the bell facing out and snug against the outside wall of the structure as the angle of penetration allows. Provide a flexible joint within 1/2 of a pipe diameter or 12-inches, whichever is greater for pipe, except PVC and HDPE pipe, leaving or entering manholes. Place pipes entering or leaving the manhole on firmly compacted bedding. Take particular care in compacting bedding within the area of the manhole excavation that is normally deeper than the sewer trench. Take special care to ensure the annual opening around each pipe entering the manhole is completely and firmly rammed full of non-shrink grout to ensure water tightness. Non-shrink grout shall conform to requirements of 9-03.20.3(2) of the Standard Specifications. Provide a watertight flexible pipe to manhole connector for pipe diameters less than or equal to 24-inches for PVC or HDPE pipes connecting to manhole. Place no PVC or HDPE pipe joint within 10-feet of the outside face of the manhole. 7-05.3(4) Drop Manhole Connections Delete the first paragraph in 7-05.3(4) and substitute the following: Construct outside drop connections where shown on Plans in accordance with these Special Provisions and 7-04, 7-05, and 7-17 of the Standard Specifications and COE Standard Drawing No. 608. Construct inside drop connections where shown on the Plans, or as approved by Engineer, in 54-inch diameter manholes or larger in accordance with these Special Provisions and 7-04, 7-05, and 7-17 of the Standard Specifications and COE Standard Drawing No. 609. Provide factory installed holes for drop connections for new manholes and core drill holes for existing manholes. Impact tools shall not be allowed for making holes in manhole walls. Supplement 7-05.3 by adding the following: I 7-05.3(5) Furnish and Install Solid Lid for Catch Basins (******) Provide new solid lids on existing catch basins where shown on the Plans. Provide solid lids conforming to 9-05.15 of the Standard Specifications, 9-05.15(1) of these Special Provisions, and to COE Standard Drawing No. 405 and 406B for Type A. and B Catch Basins and COE Standard Drawing 607 for Type 2 Catch Basins. 7-05.4 Measurement Delete all paragraphs of 7-05.4 and substitute the following: , Cleveland Avenue Division 7—DRAINAGE STRUCTURES, November 2018 Sewer System Replacement and STORM SEWERS,SANITARY SEWERS, Storm Water Separation WATER MAINS,AND CONDUITS Work Order No. UP3398 SP-172