Daily Reservoir and Pass-Thru Status Report
December 31, 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%
12/31/2020 198.4 233,606 35.2% 86.8 131,815 51.4% 365,421 39.8% 44.0 161,085 100.0%
12/30/2020 198.4 233,606 35.2% 86.8 131,815 51.4% 365,421 39.8% 43.9 160,156 99.4%
12/01/2020 198.9 240,518 36.3% 87.2 137,687 53.7% 378,205 41.1% 43.8 159,229 98.8%
12/31/2019 202.9 301,045 45.4% 90.6 192,663 75.2% 493,708 53.7% 39.2 119,655 74.3%
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
December YTD Remaining December YTD Remaining
12/30/2020 67 3,095 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
12/30/2020 68 945 13,491 1,028 28,485 12/31/2020 7:15 AM 8.14
WEATHER RELATED INFORMATION
  Choke Canyon Reservoir Lake Corpus Christi CCR/LCC Combined
  12/30/2020 MTD YTD 12/30/2020 MTD YTD 12/30/2020 MTD YTD
Air Temp 76     78        
Evaporation 88 2,811 77,946 144 3,215 69,636 232 6,026 147,582
Rainfall 0.34 0.37 23.96 0.66 0.83 31.8      
Stream Flows
Gauging Station 12/30/2020 MTD
NTRT Nueces River at Three Rivers, Texas 65 1,896
NRTT Nueces River at Tilden, Texas 0 0
FRTT Frio River at Tilden, Texas 0 2
SMTT San Miguel Creek at Tilden, Texas 0 0
ARWT Atascosa River at Whitsett, Texas 5 238
CCR Release from Choke Canyon Reservoir 58 1,727
NRMT Nueces River at Mathis, Texas (La Fruta Bridge) 168 4,088
NCAT Nueces River at Calallen, Texas 0 231
RBP Rincon Bayou Pipeline 0 0
Reservoir InFlow
Computed as: (NTRT+FRTT+SMTT)-Release from Choke Canyon 7 189
ESTUARY INFLOWS AND PASSTHRU REQUIREMENTS
Target Passthru Monthly Target 3,745   3,745
Salinity Relief Credit 0 Effective  
Credit / -Deficit From Previous Month Date Deficit Satisfied   221
Return Flow Credit Effective   500
Required Passthru Monthly Target 3,745   189
Reservoir Inflow 189
Estuary Inflows (NCAT + RBP) 231
Passthru Surplus / -Deficit 0
Report Generated 12/31/2020 at 9:14:21 AM