Daily Reservoir and Pass-Thru Status Report
December 18, 2020
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%
12/18/2020 198.5 234,978 35.5% 86.9 133,270 52.0% 368,248 40.1% 44.0 161,085 100.0%
12/17/2020 198.6 236,355 35.7% 86.9 133,270 52.0% 369,625 40.2% 44.0 161,085 100.0%
11/18/2020 198.8 239,125 36.1% 87.3 139,175 54.3% 378,300 41.2% 42.8 150,120 93.2%
12/18/2019 202.9 301,045 45.4% 90.8 196,197 76.5% 497,242 54.1% 39.6 122,849 76.3%
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
November YTD Remaining November YTD Remaining
12/17/2020 134 1,985 2,559 27,600 3,840 0 4,500 7,500
COLORADO RIVER WATER SUPPLY (CRWT)
Date Daily
Intake
MTD YTD Daily Flow MTD Flow Date Time Gage Height
12/17/2020 0 300 12,846 778 15,946 12/18/2020 7:15 AM 8.03
WEATHER RELATED INFORMATION
  Choke Canyon Reservoir Lake Corpus Christi CCR/LCC Combined
  12/17/2020 MTD YTD 12/17/2020 MTD YTD 12/17/2020 MTD YTD
Air Temp 63     64        
Evaporation 96 1,499 76,634 26 1,665 68,086 122 3,164 144,720
Rainfall 0.00 0.03 23.62 0.00 0.06 31.03      
Stream Flows
Gauging Station 12/17/2020 MTD
NTRT Nueces River at Three Rivers, Texas 58 1,110
NRTT Nueces River at Tilden, Texas 0 0
FRTT Frio River at Tilden, Texas 0 0
SMTT San Miguel Creek at Tilden, Texas 0 0
ARWT Atascosa River at Whitsett, Texas 5 168
CCR Release from Choke Canyon Reservoir 58 979
NRMT Nueces River at Mathis, Texas (La Fruta Bridge) 132 2,422
NCAT Nueces River at Calallen, Texas 2 188
RBP Rincon Bayou Pipeline 0 0
Reservoir InFlow
Computed as: (NTRT+FRTT+SMTT)-Release from Choke Canyon 1 150
ESTUARY INFLOWS AND PASSTHRU REQUIREMENTS
Target Passthru Monthly Target 4,500   4,500
Salinity Relief Credit 0 Effective  
Credit / -Deficit From Previous Month Date Deficit Satisfied   221
Return Flow Credit Effective   500
Required Passthru Monthly Target 4,500   150
Reservoir Inflow 150
Estuary Inflows (NCAT + RBP) 188
Passthru Surplus / -Deficit 0
Report Generated 12/18/2020 at 10:06:08 AM