Daily Reservoir and Pass-Thru Status Report
March 31, 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%
03/31/2021 197.5 221,467 33.4% 85.8 117,754 45.9% 339,221 36.9% 42.9 151,018 93.8%
03/30/2021 197.5 221,467 33.4% 85.7 116,400 45.4% 337,867 36.8% 42.9 151,018 93.8%
03/03/2021 197.9 226,815 34.2% 86.2 123,267 48.1% 350,082 38.1% 43.4 155,551 96.6%
03/31/2020 202.4 293,042 44.2% 89.8 178,868 69.8% 471,910 51.3% 38.1 111,156 69.0%
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
March YTD Remaining March YTD Remaining
03/30/2021 131 2,412 1,664 1,664 29,776 1,230 4,500 7,500
COLORADO RIVER WATER SUPPLY (CRWT)
Date Daily
Intake
MTD YTD Daily Flow MTD Flow Date Time Gage Height
03/30/2021 0 1,379 2,949 1,006 30,771 03/31/2021 7:15 AM 8.41
WEATHER RELATED INFORMATION
  Choke Canyon Reservoir Lake Corpus Christi CCR/LCC Combined
  03/30/2021 MTD YTD 03/30/2021 MTD YTD 03/30/2021 MTD YTD
Air Temp 87     90        
Evaporation 162 5,521 10,705 190 5,060 10,761 352 10,581 21,466
Rainfall 0.00 0.62 2 0.00 0.58 2.28      
Stream Flows
Gauging Station 03/30/2021 MTD
NTRT Nueces River at Three Rivers, Texas 57 1,732
NRTT Nueces River at Tilden, Texas 0 0
FRTT Frio River at Tilden, Texas 0 4
SMTT San Miguel Creek at Tilden, Texas 0 0
ARWT Atascosa River at Whitsett, Texas 1 78
CCR Release from Choke Canyon Reservoir 58 1,727
NRMT Nueces River at Mathis, Texas (La Fruta Bridge) 141 4,121
NCAT Nueces River at Calallen, Texas 0 15
RBP Rincon Bayou Pipeline 0 0
Reservoir InFlow
Computed as: NRTT+FRTT+SMTT+ARWT 1 46
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   449
Return Flow Credit Effective   500
Required Passthru Monthly Target 1,200   46
Reservoir Inflow 46
Estuary Inflows (NCAT + RBP) 15
Passthru Surplus / -Deficit 0
Report Generated 3/31/2021 at 8:16:50 AM