Daily Reservoir and Pass-Thru Status Report
May 3, 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%
05/03/2021 197.2 217,506 32.8% 85.2 109,768 42.8% 327,274 35.6% 44.0 161,085 100.0%
05/02/2021 197.1 216,196 32.6% 85.3 111,076 43.3% 327,272 35.6% 43.9 160,156 99.4%
04/03/2021 197.4 220,142 33.2% 85.7 116,400 45.4% 336,542 36.6% 42.8 150,120 93.2%
05/03/2020 202.0 286,713 43.3% 89.5 173,834 67.8% 460,547 50.1% 41.0 134,434 83.5%
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
05/02/2021 131 257 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
05/02/2021 0 4 4,447 16,317 27,075 05/03/2021 7:15 AM 17.12
WEATHER RELATED INFORMATION
  Choke Canyon Reservoir Lake Corpus Christi CCR/LCC Combined
  05/02/2021 MTD YTD 05/02/2021 MTD YTD 05/02/2021 MTD YTD
Air Temp 96     95        
Evaporation 245 329 16,958 334 349 15,873 579 678 32,831
Rainfall 0.00 0.36 3.31 0.00 0.4 4.29      
Stream Flows
Gauging Station 05/02/2021 MTD
NTRT Nueces River at Three Rivers, Texas 522 589
NRTT Nueces River at Tilden, Texas 0 0
FRTT Frio River at Tilden, Texas 4 5
SMTT San Miguel Creek at Tilden, Texas 2,362 2,588
ARWT Atascosa River at Whitsett, Texas 1,544 1,717
CCR Release from Choke Canyon Reservoir 58 115
NRMT Nueces River at Mathis, Texas (La Fruta Bridge) 99 216
NCAT Nueces River at Calallen, Texas 31 42
RBP Rincon Bayou Pipeline 0 0
Reservoir InFlow
Computed as: (NTRT+FRTT+SMTT)-Release from Choke Canyon 2,831 3,068
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 3,068
Estuary Inflows (NCAT + RBP) 42
Passthru Surplus / -Deficit -573
Report Generated 5/3/2021 at 2:50:31 PM