Daily Reservoir and Pass-Thru Status Report
June 30, 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%
06/30/2021 204.2 322,313 48.6% 91.4 206,995 80.8% 529,308 57.6% 43.8 159,229 98.8%
06/29/2021 204.3 323,977 48.9% 91.4 206,995 80.8% 530,972 57.8% 43.9 160,156 99.4%
05/30/2021 201.7 282,012 42.5% 88.5 157,605 61.5% 439,617 47.8% 44.0 161,085 100.0%
06/30/2020 201.4 277,357 41.8% 89.4 172,173 67.2% 449,530 48.9% 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
May YTD Remaining May YTD Remaining
06/29/2021 115 4,023 0 6,497 24,943 3,684 8,184 3,816
COLORADO RIVER WATER SUPPLY (CRWT)
Date Daily
Intake
MTD YTD Daily Flow MTD Flow Date Time Gage Height
06/29/2021 66 1,049 5,985 1,413 324,151 06/30/2021 7:15 AM 8.96
WEATHER RELATED INFORMATION
  Choke Canyon Reservoir Lake Corpus Christi CCR/LCC Combined
  06/29/2021 MTD YTD 06/29/2021 MTD YTD 06/29/2021 MTD YTD
Air Temp 82     86        
Evaporation 116 8,233 32,067 286 7,649 29,265 402 15,882 61,332
Rainfall 0.06 2.21 17.1 1.31 4.9 19.49      
Stream Flows
Gauging Station 06/29/2021 MTD
NTRT Nueces River at Three Rivers, Texas 172 63,358
NRTT Nueces River at Tilden, Texas 4 21,219
FRTT Frio River at Tilden, Texas 9 35,000
SMTT San Miguel Creek at Tilden, Texas 12 7,775
ARWT Atascosa River at Whitsett, Texas 34 41,507
CCR Release from Choke Canyon Reservoir 58 1,457
NRMT Nueces River at Mathis, Texas (La Fruta Bridge) 723 16,152
NCAT Nueces River at Calallen, Texas 445 8,977
RBP Rincon Bayou Pipeline 230 5,797
Reservoir InFlow
Computed as: (NTRT+FRTT+SMTT)-Release from Choke Canyon 136 104,676
ESTUARY INFLOWS AND PASSTHRU REQUIREMENTS
Target Passthru Monthly Target 23,000   23,000
Salinity Relief Credit 0 Effective  
Credit / -Deficit From Previous Month Date Deficit Satisfied   619
Return Flow Credit Effective   500
Required Passthru Monthly Target 23,000   23,000
Reservoir Inflow 104,676
Estuary Inflows (NCAT + RBP) 14,774
Passthru Surplus / -Deficit -7,107
Report Generated 6/30/2021 at 9:15:29 AM