Daily Reservoir and Pass-Thru Status Report
October 6, 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%
10/06/2021 203.6 312,414 47.1% 92.3 223,623 87.2% 536,037 58.3% 42.9 151,018 93.8%
10/05/2021 203.6 312,414 47.1% 92.3 223,623 87.2% 536,037 58.3% 43.0 151,919 94.3%
09/06/2021 204.0 318,997 48.1% 92.6 229,272 89.4% 548,269 59.6% 43.7 158,306 98.3%
10/06/2020 199.6 250,439 37.8% 87.9 148,255 57.8% 398,694 43.4% 43.9 160,156 99.4%
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
10/05/2021 142 717 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
10/05/2021 0 0 9,327 2,759 14,074 10/06/2021 7:15 AM 9.63
WEATHER RELATED INFORMATION
  Choke Canyon Reservoir Lake Corpus Christi CCR/LCC Combined
  10/05/2021 MTD YTD 10/05/2021 MTD YTD 10/05/2021 MTD YTD
Air Temp 88     88        
Evaporation 258 916 62,303 240 1,037 54,889 498 1,953 117,192
Rainfall 0.00 0.02 26.94 0.00 1.6 35.6      
Stream Flows
Gauging Station 10/05/2021 MTD
NTRT Nueces River at Three Rivers, Texas 141 938
NRTT Nueces River at Tilden, Texas 0 0
FRTT Frio River at Tilden, Texas 0 0
SMTT San Miguel Creek at Tilden, Texas 0 0
ARWT Atascosa River at Whitsett, Texas 46 480
CCR Release from Choke Canyon Reservoir 58 288
NRMT Nueces River at Mathis, Texas (La Fruta Bridge) 161 1,656
NCAT Nueces River at Calallen, Texas 186 3,999
RBP Rincon Bayou Pipeline 0 0
Reservoir InFlow
Computed as: (NTRT+FRTT+SMTT)-Release from Choke Canyon 83 650
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   650
Reservoir Inflow 650
Estuary Inflows (NCAT + RBP) 3,999
Passthru Surplus / -Deficit 4,012
Report Generated 10/6/2021 at 8:12:44 AM