Daily Reservoir and Pass-Thru Status Report
April 21, 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%
04/21/2021 197.0 214,890 32.4% 85.3 111,076 43.3% 325,966 35.5% 42.5 147,442 91.5%
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%
03/21/2021 197.6 222,797 33.6% 85.9 119,118 46.5% 341,915 37.2% 43.1 152,823 94.9%
04/21/2020 202.2 289,869 43.7% 89.9 180,563 70.4% 470,432 51.2% 40.6 131,068 81.4%
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
March YTD Remaining March YTD Remaining
04/20/2021 50 1,645 2,543 4,208 27,232 0 4,500 7,500
COLORADO RIVER WATER SUPPLY (CRWT)
Date Daily
Intake
MTD YTD Daily Flow MTD Flow Date Time Gage Height
04/20/2021 67 899 3,848 1,933 16,962 04/21/2021 7:15 AM 9.30
WEATHER RELATED INFORMATION
  Choke Canyon Reservoir Lake Corpus Christi CCR/LCC Combined
  04/20/2021 MTD YTD 04/20/2021 MTD YTD 04/20/2021 MTD YTD
Air Temp 84     85        
Evaporation 273 3,971 14,806 260 3,146 14,081 533 7,117 28,887
Rainfall 0.00 0.07 2.07 0.00 0.08 2.36      
Stream Flows
Gauging Station 04/20/2021 MTD
NTRT Nueces River at Three Rivers, Texas 55 1,115
NRTT Nueces River at Tilden, Texas 0 0
FRTT Frio River at Tilden, Texas 0 1
SMTT San Miguel Creek at Tilden, Texas 0 0
ARWT Atascosa River at Whitsett, Texas 0 11
CCR Release from Choke Canyon Reservoir 58 1,151
NRMT Nueces River at Mathis, Texas (La Fruta Bridge) 156 3,109
NCAT Nueces River at Calallen, Texas 13 68
RBP Rincon Bayou Pipeline 0 0
Reservoir InFlow
Computed as: NRTT+FRTT+SMTT+ARWT 0 10
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   15
Return Flow Credit Effective   500
Required Passthru Monthly Target 1,200   10
Reservoir Inflow 10
Estuary Inflows (NCAT + RBP) 68
Passthru Surplus / -Deficit 0
Report Generated 4/21/2021 at 8:36:50 AM