Daily Reservoir and Pass-Thru Status Report
September 17, 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%
09/17/2021 203.6 312,414 47.1% 92.3 223,623 87.2% 536,037 58.3% 43.3 154,639 96.0%
09/16/2021 203.7 314,054 47.4% 92.3 223,623 87.2% 537,677 58.5% 43.3 154,639 96.0%
08/17/2021 204.5 327,318 49.4% 93.1 238,806 93.2% 566,124 61.6% 44.0 161,085 100.0%
09/17/2020 199.9 254,794 38.4% 88.5 157,605 61.5% 412,399 44.9% 42.6 148,332 92.1%
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
August YTD Remaining August YTD Remaining
09/16/2021 145 1,450 2,987 12,844 18,596 0 12,000 0
COLORADO RIVER WATER SUPPLY (CRWT)
Date Daily
Intake
MTD YTD Daily Flow MTD Flow Date Time Gage Height
09/16/2021 0 865 9,327 1,501 17,436 09/17/2021 7:15 AM 8.88
WEATHER RELATED INFORMATION
  Choke Canyon Reservoir Lake Corpus Christi CCR/LCC Combined
  09/16/2021 MTD YTD 09/16/2021 MTD YTD 09/16/2021 MTD YTD
Air Temp 91     91        
Evaporation 305 5,259 56,682 295 4,436 50,282 600 9,695 106,964
Rainfall 0.00 0.27 24.29 0.00 1.54 31.91      
Stream Flows
Gauging Station 09/16/2021 MTD
NTRT Nueces River at Three Rivers, Texas 80 1,554
NRTT Nueces River at Tilden, Texas 0 1
FRTT Frio River at Tilden, Texas 0 14
SMTT San Miguel Creek at Tilden, Texas 0 0
ARWT Atascosa River at Whitsett, Texas 8 167
CCR Release from Choke Canyon Reservoir 58 921
NRMT Nueces River at Mathis, Texas (La Fruta Bridge) 189 4,965
NCAT Nueces River at Calallen, Texas 6 173
RBP Rincon Bayou Pipeline 0 1,893
Reservoir InFlow
Computed as: (NTRT+FRTT+SMTT)-Release from Choke Canyon 22 647
ESTUARY INFLOWS AND PASSTHRU REQUIREMENTS
Target Passthru Monthly Target 11,500   11,500
Salinity Relief Credit 0 Effective  
Credit / -Deficit From Previous Month Date Deficit Satisfied 09/12/2021 -1,693
Return Flow Credit Effective   500
Required Passthru Monthly Target 11,500   647
Reservoir Inflow 647
Estuary Inflows (NCAT + RBP) 2,065
Passthru Surplus / -Deficit 226
Report Generated 9/17/2021 at 9:04:56 AM