8.0 Disposal of Earthen Material

All excavated material shall be disposed of off-site. A portion of the material will be used to fill the existing drain. Suitable excess material will be incorporated into other fill locations associated with the bridge plaza or disposed of as directed by the Engineer.

9.0 Rock Protection at Outfalls

OPSS Form 407, 511, 1004 and 1860 shall apply and govern except as amended or extended herein. This work shall include installation of rip rap erosion protection on geotextile fabric at all locations where outfalls tie into the new drain as detailed on the Drawings. Geotextile fabric shall be non-woven and must meet the following minimum standards:

Grab Tensile (kN) 1.0

Mullen Burst (kPa) 2900

Tear Strength (kN) 0.4

The Contractor shall submit proof to the Engineer in advance of the work that the product supplied meets the above minimum standards.

10.0 Rock Sheeting

OPSS Forms 511 and 1004 shall apply and govern except as amended or extended herein. The Contractor shall supply and place the rock sheeting for erosion protection purposes to the lines and grades depicted on the drawings and as specified. The rock shall be supplied from an approved source, and shall consist of 300mm nominal rip rap ranging in size from 200mm to 450mm (8” to 18”), with the majority of material being in the 300 mm (12”) range. The rock sheeting shall be placed in such a manner as to provide a uniform mat thickness and surface as shown on the Drawings, and in the locations indicated on the Drawings.

11.0 Culverts and Headwalls

OPSS Forms 180, 422, 501, 902, 1002 (MUNI), 1010, 1350 (MUNI), 1440 and 1821 shall apply and govern except as amended or extended herein. The Contractor supply and install the 3.5m x 3.0m x 10m and 3.5m x 3.0m x 16m precast box culverts as detailed in these Contract Drawings including shop drawings, layout, delivery, excavation, backfill and compaction. The culvert invert shall be embedded 500mm below the upstream and downstream channel inverts. After installation of the concrete culvert sections, the culvert bottom shall be infilled with 200mm of granular material.