COE Update ~ White River Chain of Lake, July 13

[Phil Lilley]

MONDAY Afternoon UPDATE, 7/13.

Precipitation/Forecast. No rainfall over the weekend. Light rainfall
forecasted over the next 3-days. 2-Day QPF forecasts light rain over White
River Basin (0.5" or less); 3-Day QPF forecasts moderate trace, no runoff.
No rainfall in the forecast after Wednesday night. Temps forecasted to be
hot this week.

1-3-Day QPF: http://www.wpc.ncep.noaa.gov/qpf/d13_fill.gif?1436792675192

Reservoirs with 50% flood storage in use. LITTLE RIVER SYSTEM. None.
WHITE RIVER SYSTEM. Norfork.
ARKANSAS RIVER SYSTEM. Blue Mtn, Nimrod.

Reservoirs with 75% flood storage in use. (Revised)
LITTLE RIVER SYSTEM. None.
WHITE RIVER SYSTEM. Beaver, Table Rock, Bull Shoals.
ARKANSAS RIVER SYSTEM. None.

Reservoirs with 100% flood storage in use. (No change)
LITTLE RIVER SYSTEM. None.
WHITE RIVER SYSTEM. None.
ARKANSAS RIVER SYSTEM. None.

WHITE RIVER SYSTEM. All lakes remain in their respective flood pools;
Greers Ferry is falling; Table Rock, Bull Shoals and Norfork are rising,
Beaver is steady. Bull Shoals is above elevation 684.0 requiring storage
balancing between Table Rock and Bull Shoals. Downstream stages are steady
allowing increased releases from Bull Shoals up to allowable channel
capacity (regulating to 14' at Newport due to 4-Lake system using more than
70% flood storage). The three most critical projects are Beaver, Table
Rock, and Bull Shoals with less than 0.26", 0.8", and 0.6" of runoff storage
remaining in their respective flood pools. Table Rock blocked open vacuum
breaker vents because the dissolved oxygen dropped below 6 ppm in its
tailwater.

Beaver: elev 1129.48 and steady (93.7% fs); target firm power (950 dsf).
Table Rock: elev 927.66 and rising (74.6% fs); 18-hour operation
releasing 10k dsf.
Bull Shoals: elev 692.29 (90.6% fs); releasing 9.5k dsf.
Norfork: elev 570.32 (56.5% fs); target firm power (1.35k dsf), using
siphon to meet minimum flow requirement.
Greers Ferry: elev 469.74 (27.0% fs) target 3k dsf.

Current stage at Newport is 13.36' and steady (start operating to 14'
regulating stage).

Current stage at Georgetown is at 13.89' and steady (13' regulating stage).

Jim Sandberg
Operations Project Manager
Table Rock Lake