Daily Reservoir and Pass-Thru Status Report
May 20, 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%
05/20/2021 200.3 260,689 39.3% 87.4 140,670 54.9% 401,359 43.7% 44.0 161,085 100.0%
05/19/2021 199.5 249,001 37.6% 87.0 134,734 52.6% 383,735 41.7% 44.0 161,085 100.0%
04/20/2021 197.1 216,196 32.6% 85.3 111,076 43.3% 327,272 35.6% 42.5 147,442 91.5%
05/20/2020 201.9 285,141 43.0% 89.4 172,173 67.2% 457,314 49.8% 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
05/19/2021 126 2,040 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
05/19/2021 0 494 4,937 11,434 138,799 05/20/2021 7:15 AM 13.87
WEATHER RELATED INFORMATION
  Choke Canyon Reservoir Lake Corpus Christi CCR/LCC Combined
  05/19/2021 MTD YTD 05/19/2021 MTD YTD 05/19/2021 MTD YTD
Air Temp 74     72        
Evaporation 234 4,445 21,074 201 3,763 19,287 435 8,208 40,361
Rainfall 1.62 8.28 11.23 1.92 7.87 11.76      
Stream Flows
Gauging Station 05/19/2021 MTD
NTRT Nueces River at Three Rivers, Texas 2,025 18,792
NRTT Nueces River at Tilden, Texas 298 1,336
FRTT Frio River at Tilden, Texas 5,042 20,314
SMTT San Miguel Creek at Tilden, Texas 476 10,267
ARWT Atascosa River at Whitsett, Texas 1,201 12,806
CCR Release from Choke Canyon Reservoir 58 1,094
NRMT Nueces River at Mathis, Texas (La Fruta Bridge) 407 3,719
NCAT Nueces River at Calallen, Texas 1,866 4,622
RBP Rincon Bayou Pipeline 189 238
Reservoir InFlow
Computed as: (NTRT+FRTT+SMTT)-Release from Choke Canyon 7,485 48,280
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 48,280
Estuary Inflows (NCAT + RBP) 4,861
Passthru Surplus / -Deficit -5,105
Report Generated 5/20/2021 at 11:51:51 AM