Daily Reservoir and Pass-Thru Status Report
May 18, 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%
05/18/2021 198.9 240,518 36.3% 86.7 130,369 50.9% 370,887 40.4% 44.0 161,085 100.0%
05/17/2021 198.7 237,738 35.9% 86.2 123,267 48.1% 361,005 39.3% 44.1 161,085 100.0%
04/18/2021 197.2 217,506 32.8% 85.4 112,393 43.8% 329,899 35.9% 42.6 148,332 92.1%
05/18/2020 202.0 286,713 43.3% 89.5 173,834 67.8% 460,547 50.1% 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
April YTD Remaining April YTD Remaining
05/17/2021 90 1,783 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
05/17/2021 44 494 4,937 1,278 125,688 05/18/2021 7:15 AM 8.65
WEATHER RELATED INFORMATION
  Choke Canyon Reservoir Lake Corpus Christi CCR/LCC Combined
  05/17/2021 MTD YTD 05/17/2021 MTD YTD 05/17/2021 MTD YTD
Air Temp 87     87        
Evaporation 236 3,977 20,606 191 3,228 18,752 427 7,205 39,358
Rainfall 0.18 5.79 8.74 1.33 5.91 9.8      
Stream Flows
Gauging Station 05/17/2021 MTD
NTRT Nueces River at Three Rivers, Texas 3,275 14,644
NRTT Nueces River at Tilden, Texas 576 830
FRTT Frio River at Tilden, Texas 3,196 8,623
SMTT San Miguel Creek at Tilden, Texas 623 9,394
ARWT Atascosa River at Whitsett, Texas 1,673 11,099
CCR Release from Choke Canyon Reservoir 58 979
NRMT Nueces River at Mathis, Texas (La Fruta Bridge) 377 3,155
NCAT Nueces River at Calallen, Texas 846 2,036
RBP Rincon Bayou Pipeline 0 0
Reservoir InFlow
Computed as: (NTRT+FRTT+SMTT)-Release from Choke Canyon 7,037 31,682
ESTUARY INFLOWS AND PASSTHRU REQUIREMENTS
Target Passthru Monthly Target 10,551   10,551
Salinity Relief Credit 0 Effective  
Credit / -Deficit From Previous Month Date Deficit Satisfied   85
Return Flow Credit Effective   500
Required Passthru Monthly Target 10,551   10,551
Reservoir Inflow 31,682
Estuary Inflows (NCAT + RBP) 2,036
Passthru Surplus / -Deficit -7,930
Report Generated 5/18/2021 at 8:31:17 AM