1. The temporary flow control shall be constructed or installed according to the design submitted to the Contract Administrator. Upstream and downstream plugs separating the original waterbody channel and the temporary water conveyance device shall remain in place.

2. The downstream plug shall be opened to allow water into the temporary water conveyance device and water pressure shall be allowed to equalize between the original waterbody channel and the temporary water conveyance device.

3. The upstream plug shall be opened to allow water to flow through both the original waterbody channel and the temporary water conveyance device.

4. A plug shall be installed in the original waterbody channel, at the inflow confluence of the original waterbody channel and the temporary water conveyance device, to fully divert the water to flow through the temporary water conveyance device.

5. A plug shall be installed in the original waterbody channel, at the outflow confluence of the temporary water conveyance device and the original waterbody channel, to prevent backflow into the original waterbody channel.

6. The original waterbody channel isolated by the temporary waterbody channel shall be dewatered and any stranded fish shall be rescued as required.

7. If cover material is specified in the design, it shall be applied immediately after exposure of soils.

185.07.10.02           Installation of a Temporary Flow Control Within a Waterbody

At a minimum, temporary flow control within a waterbody shall be deployed according to the following sequential steps:

1. The temporary flow control shall be constructed or installed according to the design submitted to the Contract Administrator. An upstream temporary flow control device shall be installed to divert water flow into the temporary flow control according to the design.

2. A plug shall be installed in the original waterbody channel, at the inflow confluence of the original waterbody channel and the temporary water conveyance device, to fully divert the water to flow through the temporary water conveyance device.

3. A plug shall be installed in the original waterbody channel, at the outflow confluence of the temporary water conveyance device and the original waterbody channel, to prevent backflow into the original waterbody channel.

4. The original waterbody channel, isolated by the temporary waterbody channel, shall be dewatered and any stranded fish shall be rescued as required.

5. If cover material is specified in the design, it shall be applied immediately after exposure of soils.

185.07.11                 Removal

185.07.11.01            Removal of a Temporary Flow Control Outside of a Waterbody

As a minimum, temporary flow control outside of a waterbody shall be removed according to the following sequential steps:

1. All Work in the Working Area shall be completed and the temporary flow control, isolated by the temporary waterbody channel, shall be stabilized according to the Contractor’s design prior to returning the flow of water to the original waterbody channel.