Daily Reservoir and Pass-Thru Status Report
May 23, 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%
05/23/2021 201.5 278,904 42.1% 88.4 156,028 60.9% 434,932 47.3% 44.0 161,085 100.0%
05/22/2021 201.2 274,279 41.4% 88.1 151,341 59.0% 425,620 46.3% 44.0 161,085 100.0%
04/23/2021 197.0 214,890 32.4% 85.2 109,768 42.8% 324,658 35.3% 42.4 146,555 91.0%
05/23/2020 201.9 285,141 43.0% 89.4 172,173 67.2% 457,314 49.8% 43.9 160,156 99.4%
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
05/22/2021 138 2,449 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
05/22/2021 0 494 4,937 13,141 233,325 05/23/2021 7:15 AM 17.58
WEATHER RELATED INFORMATION
  Choke Canyon Reservoir Lake Corpus Christi CCR/LCC Combined
  05/22/2021 MTD YTD 05/22/2021 MTD YTD 05/22/2021 MTD YTD
Air Temp 85     83        
Evaporation 208 5,096 21,725 101 4,214 19,738 309 9,310 41,463
Rainfall 0.01 8.29 11.24 0.12 8.23 12.12      
Stream Flows
Gauging Station 05/22/2021 MTD
NTRT Nueces River at Three Rivers, Texas 3,255 31,754
NRTT Nueces River at Tilden, Texas 68 2,338
FRTT Frio River at Tilden, Texas 3,831 36,988
SMTT San Miguel Creek at Tilden, Texas 107 11,386
ARWT Atascosa River at Whitsett, Texas 701 20,712
CCR Release from Choke Canyon Reservoir 22 1,137
NRMT Nueces River at Mathis, Texas (La Fruta Bridge) 101 4,188
NCAT Nueces River at Calallen, Texas 399 8,557
RBP Rincon Bayou Pipeline 200 906
Reservoir InFlow
Computed as: (NTRT+FRTT+SMTT)-Release from Choke Canyon 7,171 78,992
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 78,992
Estuary Inflows (NCAT + RBP) 9,463
Passthru Surplus / -Deficit -503
Report Generated 5/23/2021 at 7:28:49 AM