Daily Reservoir and Pass-Thru Status Report
May 11, 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%
05/11/2021 197.4 220,142 33.2% 85.7 116,400 45.4% 336,542 36.6% 44.0 161,085 100.0%
05/10/2021 197.4 220,142 33.2% 85.6 115,055 44.9% 335,197 36.5% 43.9 160,156 99.4%
04/11/2021 197.3 218,822 33.0% 85.5 113,719 44.4% 332,541 36.2% 42.6 148,332 92.1%
05/11/2020 202.0 286,713 43.3% 89.4 172,173 67.2% 458,886 49.9% 40.1 126,918 78.8%
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
April YTD Remaining April YTD Remaining
05/10/2021 92 1,286 2,289 6,497 24,943 0 4,500 7,500
COLORADO RIVER WATER SUPPLY (CRWT)
Date Daily
Intake
MTD YTD Daily Flow MTD Flow Date Time Gage Height
05/10/2021 44 48 4,491 2,819 116,103 05/11/2021 7:15 AM 10.29
WEATHER RELATED INFORMATION
  Choke Canyon Reservoir Lake Corpus Christi CCR/LCC Combined
  05/10/2021 MTD YTD 05/10/2021 MTD YTD 05/10/2021 MTD YTD
Air Temp 90     89        
Evaporation 239 2,486 19,115 267 2,122 17,646 506 4,608 36,761
Rainfall 0.04 0.4 3.35 1.30 1.7 5.59      
Stream Flows
Gauging Station 05/10/2021 MTD
NTRT Nueces River at Three Rivers, Texas 95 7,736
NRTT Nueces River at Tilden, Texas 0 0
FRTT Frio River at Tilden, Texas 270 2,934
SMTT San Miguel Creek at Tilden, Texas 19 5,096
ARWT Atascosa River at Whitsett, Texas 29 8,006
CCR Release from Choke Canyon Reservoir 58 576
NRMT Nueces River at Mathis, Texas (La Fruta Bridge) 195 1,496
NCAT Nueces River at Calallen, Texas 49 144
RBP Rincon Bayou Pipeline 0 0
Reservoir InFlow
Computed as: (NTRT+FRTT+SMTT)-Release from Choke Canyon 327 15,190
ESTUARY INFLOWS AND PASSTHRU REQUIREMENTS
Target Passthru Monthly Target 1,200   1,200
Salinity Relief Credit 0 Effective  
Credit / -Deficit From Previous Month Date Deficit Satisfied   85
Return Flow Credit Effective   500
Required Passthru Monthly Target 1,200   1,200
Reservoir Inflow 15,190
Estuary Inflows (NCAT + RBP) 144
Passthru Surplus / -Deficit -471
Report Generated 5/11/2021 at 9:55:04 AM