Daily Reservoir and Pass-Thru Status Report
May 10, 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%
05/10/2021 197.4 220,142 33.2% 85.6 115,055 44.9% 335,197 36.5% 43.9 160,156 99.4%
05/09/2021 197.3 218,822 33.0% 85.6 115,055 44.9% 333,877 36.3% 43.9 160,156 99.4%
04/10/2021 197.2 217,506 32.8% 85.6 115,055 44.9% 332,561 36.2% 42.6 148,332 92.1%
05/10/2020 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
05/09/2021 135 1,194 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
05/09/2021 0 4 4,447 3,355 113,284 05/10/2021 7:15 AM 10.79
WEATHER RELATED INFORMATION
  Choke Canyon Reservoir Lake Corpus Christi CCR/LCC Combined
  05/09/2021 MTD YTD 05/09/2021 MTD YTD 05/09/2021 MTD YTD
Air Temp 98     94        
Evaporation 293 2,247 18,876 281 1,855 17,379 574 4,102 36,255
Rainfall 0.00 0.36 3.31 0.00 0.4 4.29      
Stream Flows
Gauging Station 05/09/2021 MTD
NTRT Nueces River at Three Rivers, Texas 108 7,640
NRTT Nueces River at Tilden, Texas 0 0
FRTT Frio River at Tilden, Texas 461 2,664
SMTT San Miguel Creek at Tilden, Texas 24 5,076
ARWT Atascosa River at Whitsett, Texas 39 7,976
CCR Release from Choke Canyon Reservoir 58 518
NRMT Nueces River at Mathis, Texas (La Fruta Bridge) 195 1,301
NCAT Nueces River at Calallen, Texas 27 95
RBP Rincon Bayou Pipeline 0 0
Reservoir InFlow
Computed as: (NTRT+FRTT+SMTT)-Release from Choke Canyon 534 14,863
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 14,863
Estuary Inflows (NCAT + RBP) 95
Passthru Surplus / -Deficit -520
Report Generated 5/10/2021 at 9:58:26 AM