Daily Reservoir and Pass-Thru Status Report
May 21, 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%
05/21/2021 200.8 268,186 40.5% 87.8 146,723 57.2% 414,909 45.1% 44.0 161,085 100.0%
05/20/2021 200.3 260,689 39.3% 87.4 140,670 54.9% 401,359 43.7% 44.0 161,085 100.0%
04/21/2021 197.0 214,890 32.4% 85.3 111,076 43.3% 325,966 35.5% 42.5 147,442 91.5%
05/21/2020 201.9 285,141 43.0% 89.5 173,834 67.8% 458,975 49.9% 43.9 160,156 99.4%
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
April YTD Remaining April YTD Remaining
05/20/2021 132 2,173 2,289 6,497 24,943 0 4,500 7,500
COLORADO RIVER WATER SUPPLY (CRWT)
Date Daily
Intake
MTD YTD Daily Flow MTD Flow Date Time Gage Height
05/20/2021 0 494 4,937 45,854 184,653 05/21/2021 7:15 AM 27.41
WEATHER RELATED INFORMATION
  Choke Canyon Reservoir Lake Corpus Christi CCR/LCC Combined
  05/20/2021 MTD YTD 05/20/2021 MTD YTD 05/20/2021 MTD YTD
Air Temp 86     83        
Evaporation 229 4,674 21,303 160 3,923 19,447 389 8,597 40,750
Rainfall 0.00 8.28 11.23 0.00 7.87 11.76      
Stream Flows
Gauging Station 05/20/2021 MTD
NTRT Nueces River at Three Rivers, Texas 5,379 24,172
NRTT Nueces River at Tilden, Texas 776 2,112
FRTT Frio River at Tilden, Texas 6,292 26,607
SMTT San Miguel Creek at Tilden, Texas 780 11,047
ARWT Atascosa River at Whitsett, Texas 2,978 15,783
CCR Release from Choke Canyon Reservoir 22 1,116
NRMT Nueces River at Mathis, Texas (La Fruta Bridge) 322 4,041
NCAT Nueces River at Calallen, Texas 2,124 6,746
RBP Rincon Bayou Pipeline 243 481
Reservoir InFlow
Computed as: (NTRT+FRTT+SMTT)-Release from Choke Canyon 12,430 60,710
ESTUARY INFLOWS AND PASSTHRU REQUIREMENTS
Target Passthru Monthly Target 10,551   10,551
Salinity Relief Credit 0 Effective  
Credit / -Deficit From Previous Month Date Deficit Satisfied   85
Return Flow Credit Effective   500
Required Passthru Monthly Target 10,551   10,551
Reservoir Inflow 60,710
Estuary Inflows (NCAT + RBP) 7,227
Passthru Surplus / -Deficit -2,739
Report Generated 5/21/2021 at 8:02:03 AM