The culvert replacements and new pipe installation on this project shall be set to the grades as shown on the plans or as otherwise established herein and the City Drainage Superintendent or the Consulting Engineer may make minor changes to the bridge alignment as they deem necessary to suit the site conditions. All work shall be carried out in general accordance with the items in the “STANDARD SPECIFICATIONS FOR ACCESS BRIDGE CONSTRUCTION” attached to this report and labelled Appendix “REI-C”.

lX. CONCRETE BRIDGE INSTALLATION

The new concrete pipe to be installed on this project is required to be reinforced precast concrete Class 65-D. The Contractor shall connect the pipe sections together by use of a rubber gasket bell and spigot joint installed in accordance with the manufacturer’s recommendations. All joints shall be installed to ensure a positive seal against soil migration through the joints. The reinforced concrete pipe shall be placed on a bedding of not less than 150 mm of Granular "A" compacted to 95% Standard Proctor Density (S.P.D.) and shaped to suit the bottom contour of the pipe. The Granular "A" bedding and cover shall extend from 150 mm (min.) below pipe bottom to 300 mm (min.) above the top of the pipe. In the boulevards the pipe shall be backfilled with inorganic native material compacted to 95% S.P.D. The top 100 mm shall be topsoil and the area shall be seeded and mulched. Backfill material shall be placed to finished grade elevation. In the roadway and at driveways, the pipe shall be backfilled with Granular “A”, “B” or recycled granular material meeting the requirements of Granular “A” or “B”, compacted to 100% S.P.D. Driveways shall be restored with a minimum of 300 mm thick Granular “A”. Roads shall be restored with a minimum of 450 mm thick Granular “A”, 65 mm thick HL-4 and 40 mm thick HL-3 asphalt or Superpave equivalent, or as noted in the schedule of items and on the plans. Where “NR” is noted in the schedule of items and prices or on the plans only non-recycled material shall be used.

The new precast concrete box culvert structure to be installed on this project is required to conform to the most recent Canadian Highway Bridge Design Code (C.H.B.D.C.) truck loading standards and adhere to the Ontario Provincial Standard Specification (O.P.S.S.) 1821. The minimum cover over the reinforced concrete box culvert O.P.S.S. 1821 shall be 600mm minimum. The installation of this precast concrete box culvert shall comply with O.P.S.S. 904, and any additional references identified within the said Standards Specification. The precast concrete box culvert unit shall include reinforcing steel, dowels, grouting and curing of joints, waterproofing, and shear plate connections in accordance with O.P.S.S. 422. Bonding agents such as “Intralok” by W.R. Meadows manufacturer, or equal, shall be used for joint connections and on exposed lifting sockets on the precast concrete box culvert. Curing and sealing compounds such as “Cure N’ Seal CS309” by W.R. Meadows manufacturer, or equal, shall be applied to all joints and exposed concrete. Waterproofing membrane such as “MEL-ROL”, a roll on self-adhering heavy-duty membrane made by manufacturer W.R. Meadows, or equal, shall be applied to the joint connections following bonding agents and cure and seal applications. Stainless steel shear connection plates and anchor rods are to be installed on the precast concrete box culvert at all joints as seen on the plans in Appendix “REI-E”. The contractor shall obtain shop drawings showing the fabrication, assembly, and steps for installation and provide said drawings to the Consulting Engineer for approval prior to the construction of the bridge. The shop drawings shall have the seal and signature of a Professional Engineer licensed in Ontario certifying that the design meets minimum design standards and includes fabrication details, hardware, and reinforcing schedules which are to be strictly followed.

The Contractor shall note that the placement of any new culvert shall be performed totally in the dry and it shall be prepared to take whatever steps are necessary to ensure same, all to the full