Daily Reservoir and Pass-Thru Status Report
May 15, 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%
05/15/2021 197.4 220,142 33.2% 85.7 116,400 45.4% 336,542 36.6% 44.0 161,085 100.0%
05/14/2021 197.5 221,467 33.4% 85.7 116,400 45.4% 337,867 36.8% 44.0 161,085 100.0%
04/15/2021 197.2 217,506 32.8% 85.4 112,393 43.8% 329,899 35.9% 42.6 148,332 92.1%
05/15/2020 201.9 285,141 43.0% 89.3 170,521 66.5% 455,662 49.6% 43.6 157,385 97.7%
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
05/14/2021 68 1,559 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
05/14/2021 67 314 4,757 1,227 122,185 05/15/2021 7:15 AM 8.69
WEATHER RELATED INFORMATION
  Choke Canyon Reservoir Lake Corpus Christi CCR/LCC Combined
  05/14/2021 MTD YTD 05/14/2021 MTD YTD 05/14/2021 MTD YTD
Air Temp 85     84        
Evaporation 254 3,412 20,041 212 2,918 18,442 466 6,330 38,483
Rainfall 0.00 1.09 4.04 0.00 2.34 6.23      
Stream Flows
Gauging Station 05/14/2021 MTD
NTRT Nueces River at Three Rivers, Texas 124 8,129
NRTT Nueces River at Tilden, Texas 0 0
FRTT Frio River at Tilden, Texas 756 4,321
SMTT San Miguel Creek at Tilden, Texas 44 6,035
ARWT Atascosa River at Whitsett, Texas 34 8,165
CCR Release from Choke Canyon Reservoir 58 806
NRMT Nueces River at Mathis, Texas (La Fruta Bridge) 118 2,138
NCAT Nueces River at Calallen, Texas 148 1,077
RBP Rincon Bayou Pipeline 0 0
Reservoir InFlow
Computed as: (NTRT+FRTT+SMTT)-Release from Choke Canyon 867 17,679
ESTUARY INFLOWS AND PASSTHRU REQUIREMENTS
Target Passthru Monthly Target 1,200   1,200
Salinity Relief Credit 0 Effective  
Credit / -Deficit From Previous Month Date Deficit Satisfied   85
Return Flow Credit Effective   500
Required Passthru Monthly Target 1,200   1,200
Reservoir Inflow 17,679
Estuary Inflows (NCAT + RBP) 1,077
Passthru Surplus / -Deficit 462
Report Generated 5/15/2021 at 8:43:07 AM