Daily Reservoir and Pass-Thru Status Report
October 18, 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%
10/18/2021 203.3 307,518 46.4% 92.2 221,752 86.5% 529,270 57.6% 43.8 159,229 98.8%
10/17/2021 203.3 307,518 46.4% 92.3 223,623 87.2% 531,141 57.8% 43.7 158,306 98.3%
09/18/2021 203.6 312,414 47.1% 92.3 223,623 87.2% 536,037 58.3% 43.3 154,639 96.0%
10/18/2020 199.3 246,145 37.1% 87.8 146,723 57.2% 392,868 42.7% 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
September YTD Remaining September YTD Remaining
10/17/2021 138 2,382 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
10/17/2021 0 0 9,327 24,217 97,628 10/18/2021 7:15 AM 21.77
WEATHER RELATED INFORMATION
  Choke Canyon Reservoir Lake Corpus Christi CCR/LCC Combined
  10/17/2021 MTD YTD 10/17/2021 MTD YTD 10/17/2021 MTD YTD
Air Temp 73     74        
Evaporation 171 3,928 65,315 261 3,705 57,557 432 7,633 122,872
Rainfall 0.00 0.47 27.39 0.00 2.75 36.75      
Stream Flows
Gauging Station 10/17/2021 MTD
NTRT Nueces River at Three Rivers, Texas 230 3,071
NRTT Nueces River at Tilden, Texas 0 0
FRTT Frio River at Tilden, Texas 0 2
SMTT San Miguel Creek at Tilden, Texas 44 44
ARWT Atascosa River at Whitsett, Texas 92 1,306
CCR Release from Choke Canyon Reservoir 58 979
NRMT Nueces River at Mathis, Texas (La Fruta Bridge) 122 3,256
NCAT Nueces River at Calallen, Texas 26 4,286
RBP Rincon Bayou Pipeline 0 0
Reservoir InFlow
Computed as: (NTRT+FRTT+SMTT)-Release from Choke Canyon 217 2,138
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   2,138
Reservoir Inflow 2,138
Estuary Inflows (NCAT + RBP) 4,286
Passthru Surplus / -Deficit 2,812
Report Generated 10/18/2021 at 8:17:41 AM