Daily Reservoir and Pass-Thru Status Report
October 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%
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%
10/16/2021 203.4 309,146 46.6% 92.3 223,623 87.2% 532,769 58.0% 43.4 155,551 96.6%
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%
10/17/2020 199.3 246,145 37.1% 87.9 148,255 57.8% 394,400 42.9% 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
10/16/2021 138 2,243 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
10/16/2021 0 0 9,327 32,554 73,411 10/17/2021 7:15 AM 25.31
WEATHER RELATED INFORMATION
  Choke Canyon Reservoir Lake Corpus Christi CCR/LCC Combined
  10/16/2021 MTD YTD 10/16/2021 MTD YTD 10/16/2021 MTD YTD
Air Temp 73     73        
Evaporation 237 3,757 65,144 207 3,444 57,296 444 7,201 122,440
Rainfall 0.00 0.47 27.39 0.00 2.75 36.75      
Stream Flows
Gauging Station 10/16/2021 MTD
NTRT Nueces River at Three Rivers, Texas 570 2,841
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 195 1,214
CCR Release from Choke Canyon Reservoir 58 921
NRMT Nueces River at Mathis, Texas (La Fruta Bridge) 122 3,134
NCAT Nueces River at Calallen, Texas 27 4,261
RBP Rincon Bayou Pipeline 0 0
Reservoir InFlow
Computed as: (NTRT+FRTT+SMTT)-Release from Choke Canyon 512 1,922
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   1,922
Reservoir Inflow 1,922
Estuary Inflows (NCAT + RBP) 4,261
Passthru Surplus / -Deficit 3,003
Report Generated 10/17/2021 at 12:07:35 PM