Daily Reservoir and Pass-Thru Status Report
September 30, 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%
09/30/2021 203.6 312,414 47.1% 92.0 218,027 85.1% 530,441 57.7% 42.8 150,120 93.2%
09/29/2021 203.4 309,146 46.6% 91.9 216,174 84.3% 525,320 57.2% 42.8 150,120 93.2%
08/30/2021 204.2 322,313 48.6% 92.8 233,068 90.9% 555,381 60.4% 43.7 158,306 98.3%
09/30/2020 199.7 251,884 38.0% 88.1 151,341 59.0% 403,225 43.9% 44.0 161,085 100.0%
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
09/29/2021 143 3,330 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
09/29/2021 0 865 9,327 1,110 24,447 09/30/2021 7:15 AM 7.77
WEATHER RELATED INFORMATION
  Choke Canyon Reservoir Lake Corpus Christi CCR/LCC Combined
  09/29/2021 MTD YTD 09/29/2021 MTD YTD 09/29/2021 MTD YTD
Air Temp 85     95        
Evaporation 258 9,716 61,139 54 7,832 53,678 312 17,548 114,817
Rainfall 1.60 1.87 25.89 0.40 2.23 32.6      
Stream Flows
Gauging Station 09/29/2021 MTD
NTRT Nueces River at Three Rivers, Texas 112 2,543
NRTT Nueces River at Tilden, Texas 0 1
FRTT Frio River at Tilden, Texas 0 15
SMTT San Miguel Creek at Tilden, Texas 0 0
ARWT Atascosa River at Whitsett, Texas 18 257
CCR Release from Choke Canyon Reservoir 58 1,669
NRMT Nueces River at Mathis, Texas (La Fruta Bridge) 153 7,322
NCAT Nueces River at Calallen, Texas 21 372
RBP Rincon Bayou Pipeline 0 1,893
Reservoir InFlow
Computed as: (NTRT+FRTT+SMTT)-Release from Choke Canyon 54 888
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   888
Reservoir Inflow 888
Estuary Inflows (NCAT + RBP) 2,265
Passthru Surplus / -Deficit 184
Report Generated 9/30/2021 at 8:52:15 AM