Daily Reservoir and Pass-Thru Status Report
May 12, 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%
05/12/2021 197.4 220,142 33.2% 85.8 117,754 45.9% 337,896 36.8% 44.1 161,085 100.0%
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%
04/12/2021 197.2 217,506 32.8% 85.5 113,719 44.4% 331,225 36.0% 42.6 148,332 92.1%
05/12/2020 201.9 285,141 43.0% 89.3 170,521 66.5% 455,662 49.6% 40.0 126,098 78.3%
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
05/11/2021 68 1,354 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
05/11/2021 68 116 4,559 2,045 118,147 05/12/2021 7:15 AM 9.74
WEATHER RELATED INFORMATION
  Choke Canyon Reservoir Lake Corpus Christi CCR/LCC Combined
  05/11/2021 MTD YTD 05/11/2021 MTD YTD 05/11/2021 MTD YTD
Air Temp 91     90        
Evaporation 247 2,733 19,362 261 2,383 17,907 508 5,116 37,269
Rainfall 0.69 1.09 4.04 0.64 2.34 6.23      
Stream Flows
Gauging Station 05/11/2021 MTD
NTRT Nueces River at Three Rivers, Texas 86 7,821
NRTT Nueces River at Tilden, Texas 0 0
FRTT Frio River at Tilden, Texas 106 3,040
SMTT San Miguel Creek at Tilden, Texas 19 5,115
ARWT Atascosa River at Whitsett, Texas 24 8,030
CCR Release from Choke Canyon Reservoir 58 633
NRMT Nueces River at Mathis, Texas (La Fruta Bridge) 202 1,698
NCAT Nueces River at Calallen, Texas 59 203
RBP Rincon Bayou Pipeline 0 0
Reservoir InFlow
Computed as: (NTRT+FRTT+SMTT)-Release from Choke Canyon 154 15,343
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 15,343
Estuary Inflows (NCAT + RBP) 203
Passthru Surplus / -Deficit -412
Report Generated 5/12/2021 at 9:00:28 AM