Daily Reservoir and Pass-Thru Status Report
May 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%
05/22/2021 201.2 274,279 41.4% 88.1 151,341 59.0% 425,620 46.3% 44.0 161,085 100.0%
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%
04/22/2021 197.1 216,196 32.6% 85.3 111,076 43.3% 327,272 35.6% 42.4 146,555 91.0%
05/22/2020 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
05/21/2021 138 2,311 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
05/21/2021 0 494 4,937 35,532 220,184 05/22/2021 7:15 AM 28.44
WEATHER RELATED INFORMATION
  Choke Canyon Reservoir Lake Corpus Christi CCR/LCC Combined
  05/21/2021 MTD YTD 05/21/2021 MTD YTD 05/21/2021 MTD YTD
Air Temp 87     84        
Evaporation 214 4,888 21,517 190 4,113 19,637 404 9,001 41,154
Rainfall 0.00 8.28 11.23 0.24 8.11 12      
Stream Flows
Gauging Station 05/21/2021 MTD
NTRT Nueces River at Three Rivers, Texas 4,327 28,499
NRTT Nueces River at Tilden, Texas 158 2,270
FRTT Frio River at Tilden, Texas 6,551 33,157
SMTT San Miguel Creek at Tilden, Texas 232 11,280
ARWT Atascosa River at Whitsett, Texas 4,228 20,011
CCR Release from Choke Canyon Reservoir 0 1,116
NRMT Nueces River at Mathis, Texas (La Fruta Bridge) 46 4,087
NCAT Nueces River at Calallen, Texas 1,411 8,158
RBP Rincon Bayou Pipeline 225 706
Reservoir InFlow
Computed as: (NTRT+FRTT+SMTT)-Release from Choke Canyon 11,110 71,820
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 71,820
Estuary Inflows (NCAT + RBP) 8,864
Passthru Surplus / -Deficit -1,102
Report Generated 5/22/2021 at 9:27:27 AM