Daily Reservoir and Pass-Thru Status Report
October 13, 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%
10/13/2021 203.4 309,146 46.6% 92.1 219,887 85.8% 529,033 57.6% 42.6 148,332 92.1%
10/12/2021 203.4 309,146 46.6% 92.2 221,752 86.5% 530,898 57.8% 42.7 149,224 92.6%
09/13/2021 203.8 315,698 47.6% 92.3 223,623 87.2% 539,321 58.7% 43.4 155,551 96.6%
10/13/2020 199.4 247,569 37.4% 87.8 146,723 57.2% 394,292 42.9% 43.8 159,229 98.8%
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
September YTD Remaining September YTD Remaining
10/12/2021 139 1,694 3,474 16,318 15,122 0 12,000 0
COLORADO RIVER WATER SUPPLY (CRWT)
Date Daily
Intake
MTD YTD Daily Flow MTD Flow Date Time Gage Height
10/12/2021 0 0 9,327 1,018 25,474 10/13/2021 7:15 AM 8.03
WEATHER RELATED INFORMATION
  Choke Canyon Reservoir Lake Corpus Christi CCR/LCC Combined
  10/12/2021 MTD YTD 10/12/2021 MTD YTD 10/12/2021 MTD YTD
Air Temp 89     89        
Evaporation 275 2,637 64,024 250 2,551 56,403 525 5,188 120,427
Rainfall 0.00 0.02 26.94 0.00 1.6 35.6      
Stream Flows
Gauging Station 10/12/2021 MTD
NTRT Nueces River at Three Rivers, Texas 84 1,581
NRTT Nueces River at Tilden, Texas 0 0
FRTT Frio River at Tilden, Texas 0 1
SMTT San Miguel Creek at Tilden, Texas 0 0
ARWT Atascosa River at Whitsett, Texas 16 619
CCR Release from Choke Canyon Reservoir 58 691
NRMT Nueces River at Mathis, Texas (La Fruta Bridge) 123 2,618
NCAT Nueces River at Calallen, Texas 0 4,233
RBP Rincon Bayou Pipeline 0 0
Reservoir InFlow
Computed as: (NTRT+FRTT+SMTT)-Release from Choke Canyon 26 891
ESTUARY INFLOWS AND PASSTHRU REQUIREMENTS
Target Passthru Monthly Target 9,000   9,000
Salinity Relief Credit 0 Effective  
Credit / -Deficit From Previous Month Date Deficit Satisfied 10/01/2021 164
Return Flow Credit Effective   500
Required Passthru Monthly Target 9,000   891
Reservoir Inflow 891
Estuary Inflows (NCAT + RBP) 4,233
Passthru Surplus / -Deficit 4,006
Report Generated 10/13/2021 at 8:25:00 AM