West Channel Sand Bar Relocation February 6~7

Current Opened Gate: #1, #2, #3 (half), and #20.

On 6-Feb-07, the gates remained in the same opening configuration since last Friday (2-Feb): #1~#3 and #20 lowered.

The upstream water depth is maintained 3.1 ft on the PLC screen.

Gate #3 was down halfway on 7-Feb-07 for maintaining design water depth 3 ft (water depth was slightly decreased 2.95 ft this morning) (figure 1).

Measured water levels were 4995.29 ft upstream and 4993.42 ft downstream.

Gate #3

half down

Figure 1 [EB3] Figure 2

At the middle of the channel, sand bars were still existed (figure 2). However, most of sand bars at the west side of the channel have been relocated (figure 3).

West bank erosion was not in progress (figure 4). No specific change was found in the fish passage flow (figure 5).

Gate #20

Figure 3 [WB5] Figure 4 [WB2]

Figure 5 [FP2]