Gate Operating Schedules.pdf

1. Regular Gate Operation Schedule. The regular gate operation schedule is shown in Table 1. It is included for reference purposes but will not be used during the contract.

Table 1 Dam No. 4 Monongahela River

Regular Gate Operating Schedule dated 1 June 1994 (Gate Flows Recomputed based on Hydraulic Model Data)

Upper Pool El. 743.5, Min Lower Pool El. 726.9 (Dam 3) Upper Gage, 9.0 ft; Minimum Lower Gage, 9.0 ft

River Lower Pool Gate Types and Number Total Maxwell

Discharge Gage Double Double Single Single Double ft opening (cfs) Elevation (ft) 1 2 3 4 5 open in ft

130 726.9 9.0 Gates Closed 0 0 2110 727.8 9.9 0 0 1 0 0 1 1 4520 728.7 10.8 0 0 2 0 0 2 2 8050 729.8 11.9 0 0 2 2 0 4 3

10970 730.7 12.8 0 2 2 2 0 6 4 13850 731.5 13.6 0 2 2 2 2 8 5 16760 732.2 14.3 2 2 2 2 2 10 7 20420 733.0 15.1 2 2 4 2 2 12 8 26570 734.3 16.4 2 4 4 4 2 16 11 31150 735.3 17.4 4 4 4 4 4 20 14 35940 736.3 18.4 4 4 6 6 4 24 18 40520 737.1 19.2 4 6 6 6 6 28 21 44480 737.8 19.9 6 6 8 6 6 32 23 47720 738.4 20.5 6 8 8 8 6 36 26 50550 738.9 21.0 8 8 8 8 8 40 28 53360 739.4 21.5 8 8 10 10 8 44 30 55760 739.8 21.9 8 10 10 10 10 48 32 59370 740.4 22.5 10 10 12 12 10 54 36 61950 740.8 22.9 12 12 12 12 12 60 39 63520 741.1 23.2 12 12 F 12 12 64 41 65060 741.3 23.4 12 12 F F 12 68 42 66420 741.6 23.7 12 F F F 12 72 44 67700 741.8 23.9 12 F F F F 76 45 68820 742.0 24.1 F F F F F 80 47

Gate openings (ft) are shown below gate numbers; these are measured from crest of dam to the bottom of gates

Any operation shown may be made in parts for closer control

Two feet is the minimum desirable difference in opening of available gates

Openings at Maxwell, shown above, correspond to discharges shown for Dam # 4

Flow over 43 ft of fixed weir, crest el. 742.5, would be about 130 cfs

Effective opening raised clear of water is assumed to be 16 ft Desirable minimum lower pool elev for 1 gate fully open is 739.5 (21.6 gage) RP 3/17/2003

2. Gate Operation Schedule during River Wall Construction. The gate operation schedule to be used during the contract is shown in Table 2. This schedule will continue to replace the regular schedule until the new lower guard wall is installed in a later contract.

Table 2 Dam No. 4 Monongahela River

Gate Operating Schedule During River Wall Construction Three gates available, two gates restricted

(Gates 1 & 2 will be lagged to reduce velocities & eddy near the lock & fixed weir will be bulkheaded)

River Lower Pool Gate Number Total Maxwell Discharge Gage Restricted Available ft opening

(cfs) Elevation (ft) 1 2 3 4 5 open in ft

0 726.9 9.0

Gates Closed 0 0 1990 727.8 9.9 0 0 0 1 0 1 1 4390 728.6 10.7 0 0 2 0 2 2 7660 729.7 11.8 0 0 1 2 1 4 3

10870 730.7 12.8 0 0 2 2 2 6 4 12360 731.1 13.2 0.5 0.5 2 2 2 7 5 16400 732.1 14.2 0.5 0.5 2 4 2 9 6 19770 732.8 14.9 0.5 0.5 3 4 3 11 8 23340 733.6 15.7 0.5 0.5 4 4 4 13 10 24390 733.9 16.0 1 1 4 4 4 14 10 27140 734.5 16.6 1 1 4 6 4 16 12 28160 734.7 16.8 1.5 1.5 4 6 4 17 12 30800 735.3 17.4 1.5 1.5 4 6 6 19 14 31720 735.4 17.5 2 2 4 6 6 20 15 33870 735.9 18.0 2 4 4 6 6 22 16 35830 736.2 18.3 4 4 4 6 6 24 17 38180 736.7 18.8 6 4 4 6 6 26 19 40440 737.1 19.2 6 6 4 6 6 28 21 42590 737.5 19.6 6 6 6 6 6 30 22 44410 737.8 19.9 6 6 6 6 8 32 23 46110 738.1 20.2 8 6 6 6 8 34 24 47660 738.4 20.5 8 6 6 8 8 36 26 49100 738.7 20.8 8 8 6 8 8 38 27 50500 738.9 21.0 8 8 8 8 8 40 28 51950 739.2 21.3 8 8 8 8 10 42 29 53310 739.4 21.5 10 8 8 8 10 44 30 54540 739.6 21.7 10 8 8 10 10 46 31 56830 740.0 22.1 10 10 10 10 10 50 33 58220 740.2 22.3 10 10 10 10 12 52 35 60320 740.6 22.7 12 10 10 12 12 56 37 61960 740.8 22.9 12 12 12 12 12 60 39 63520 741.1 23.2 12 12 12 12 F 64 41 65050 741.3 23.4 12 12 12 F F 68 42 66400 741.6 23.7 F 12 12 F F 72 44 67660 741.8 23.9 F 12 F F F 76 45 68840 742.0 24.1 F F F F F 80 47

Effective opening raised clear of water is assumed to be 16 ft

RP 4/7/2003