Daily Reservoir and Pass-Thru Status Report
June 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%
06/21/2021 204.4 325,645 49.1% 91.7 212,485 82.9% 538,130 58.5% 43.9 160,156 99.4%
06/20/2021 204.4 325,645 49.1% 91.8 214,326 83.6% 539,971 58.7% 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%
06/21/2020 201.5 278,904 42.1% 89.5 173,834 67.8% 452,738 49.3% 43.3 154,639 96.0%
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
06/20/2021 120 2,974 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
06/20/2021 67 443 5,379 1,872 306,351 06/21/2021 7:15 AM 9.53
WEATHER RELATED INFORMATION
  Choke Canyon Reservoir Lake Corpus Christi CCR/LCC Combined
  06/20/2021 MTD YTD 06/20/2021 MTD YTD 06/20/2021 MTD YTD
Air Temp 88     91        
Evaporation 243 5,750 29,584 268 5,081 26,697 511 10,831 56,281
Rainfall 0.00 1.61 16.5 0.00 2.49 17.08      
Stream Flows
Gauging Station 06/20/2021 MTD
NTRT Nueces River at Three Rivers, Texas 274 61,549
NRTT Nueces River at Tilden, Texas 64 21,046
FRTT Frio River at Tilden, Texas 17 34,920
SMTT San Miguel Creek at Tilden, Texas 5 7,638
ARWT Atascosa River at Whitsett, Texas 58 41,142
CCR Release from Choke Canyon Reservoir 58 939
NRMT Nueces River at Mathis, Texas (La Fruta Bridge) 703 9,772
NCAT Nueces River at Calallen, Texas 351 5,745
RBP Rincon Bayou Pipeline 231 3,739
Reservoir InFlow
Computed as: (NTRT+FRTT+SMTT)-Release from Choke Canyon 238 103,168
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 103,168
Estuary Inflows (NCAT + RBP) 9,484
Passthru Surplus / -Deficit -12,397
Report Generated 6/21/2021 at 8:48:11 AM