Daily Reservoir and Pass-Thru Status Report
July 22, 2021
Reservoir Supply (AcFt); Stream Flow (AcFt); Evaporation (AcFt); Elevation (Ft); Rainfall (Inches); Temperature (°F); Gage Height (Ft MSL)
RESERVOIR STATISTICS
Effective June 24, 2017, updated total reservor capacities for Choke Canyon Reservoir (2012 TWDB Volumetric Survey) and
Lake Corpus Christi (2016 TWDB Volumetric Survey) are being reflected in the Daily Reservoir System and Pass-Thru Status Report
  Choke Canyon Reservoir Lake Corpus Christi CCR/LCC Combined Lake Texana
Date Elevation Volume % Capacity Elevation Volume % Capacity Volume % Capacity Elevation Volume % Capacity
FULL 220.5 662,821 100% 94.0 256,339 100% 919,160 100% 44.0 161,085 100%
07/22/2021 204.9 334,048 50.4% 93.1 238,806 93.2% 572,854 62.3% 44.0 161,085 100.0%
07/21/2021 204.9 334,048 50.4% 93.1 238,806 93.2% 572,854 62.3% 44.0 161,085 100.0%
06/22/2021 204.3 323,977 48.9% 91.7 212,485 82.9% 536,462 58.4% 44.0 161,085 100.0%
07/22/2020 200.8 268,186 40.5% 88.8 162,385 63.3% 430,571 46.8% 43.7 158,306 98.3%
LAKE TEXANA WATER SUPPLY*
* The split between Non-Interruptible and Interruptible amounts are updated monthly, usually the first working day of the month, so they reflect the total and remaining amounts as of the end of the previous month
Date Daily Intake MTD Non-Interuptible Interruptible
June YTD Remaining June YTD Remaining
07/21/2021 73 1,968 348 6,844 24,596 3,816 12,000 0
COLORADO RIVER WATER SUPPLY (CRWT)
Date Daily
Intake
MTD YTD Daily Flow MTD Flow Date Time Gage Height
07/21/2021 67 597 6,622 1,717 110,312 07/22/2021 7:15 AM 9.47
WEATHER RELATED INFORMATION
  Choke Canyon Reservoir Lake Corpus Christi CCR/LCC Combined
  07/21/2021 MTD YTD 07/21/2021 MTD YTD 07/21/2021 MTD YTD
Air Temp 90     90        
Evaporation 325 4,986 37,218 448 4,695 34,151 773 9,681 71,369
Rainfall 0.00 6.16 23.28 1.13 8.93 28.86      
Stream Flows
Gauging Station 07/21/2021 MTD
NTRT Nueces River at Three Rivers, Texas 526 27,822
NRTT Nueces River at Tilden, Texas 136 3,684
FRTT Frio River at Tilden, Texas 9 3,227
SMTT San Miguel Creek at Tilden, Texas 38 6,878
ARWT Atascosa River at Whitsett, Texas 49 13,639
CCR Release from Choke Canyon Reservoir 58 1,171
NRMT Nueces River at Mathis, Texas (La Fruta Bridge) 142 6,749
NCAT Nueces River at Calallen, Texas 35 17,805
RBP Rincon Bayou Pipeline 0 2,296
Reservoir InFlow
Computed as: (NTRT+FRTT+SMTT)-Release from Choke Canyon 516 36,756
ESTUARY INFLOWS AND PASSTHRU REQUIREMENTS
Target Passthru Monthly Target 4,500   1,125
Salinity Relief Credit 3,375 Effective 07/19/2021
Credit / -Deficit From Previous Month Date Deficit Satisfied   -6,416
Return Flow Credit Effective   500
Required Passthru Monthly Target 1,125   1,125
Reservoir Inflow 36,756
Estuary Inflows (NCAT + RBP) 20,100
Passthru Surplus / -Deficit 13,059
Report Generated 7/22/2021 at 9:00:22 AM