Daily Reservoir and Pass-Thru Status Report
September 23, 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%
09/23/2021 203.5 310,778 46.9% 92.1 219,887 85.8% 530,665 57.7% 43.0 151,919 94.3%
09/22/2021 203.6 312,414 47.1% 92.2 221,752 86.5% 534,166 58.1% 43.1 152,823 94.9%
08/23/2021 204.4 325,645 49.1% 93.0 236,887 92.4% 562,532 61.2% 43.8 159,229 98.8%
09/23/2020 199.8 253,336 38.2% 88.4 156,028 60.9% 409,364 44.5% 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
09/22/2021 145 2,321 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
09/22/2021 0 865 9,327 401 21,714 09/23/2021 7:15 AM 7.38
WEATHER RELATED INFORMATION
  Choke Canyon Reservoir Lake Corpus Christi CCR/LCC Combined
  09/22/2021 MTD YTD 09/22/2021 MTD YTD 09/22/2021 MTD YTD
Air Temp 84     83        
Evaporation 400 7,519 58,942 358 6,295 52,141 758 13,814 111,083
Rainfall 0.00 0.27 24.29 0.00 1.62 31.99      
Stream Flows
Gauging Station 09/22/2021 MTD
NTRT Nueces River at Three Rivers, Texas 72 2,002
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 6 209
CCR Release from Choke Canyon Reservoir 58 1,266
NRMT Nueces River at Mathis, Texas (La Fruta Bridge) 177 6,161
NCAT Nueces River at Calallen, Texas 38 319
RBP Rincon Bayou Pipeline 0 1,893
Reservoir InFlow
Computed as: (NTRT+FRTT+SMTT)-Release from Choke Canyon 15 750
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   750
Reservoir Inflow 750
Estuary Inflows (NCAT + RBP) 2,212
Passthru Surplus / -Deficit 269
Report Generated 9/23/2021 at 9:26:32 AM