Daily Reservoir and Pass-Thru Status Report
December 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%
12/31/2021 202.2 289,869 43.7% 91.2 203,365 79.3% 493,234 53.7% 43.7 158,306 98.3%
12/30/2021 202.2 289,869 43.7% 91.2 203,365 79.3% 493,234 53.7% 43.7 158,306 98.3%
12/01/2021 202.5 294,634 44.5% 91.6 210,649 82.2% 505,283 55.0% 43.9 160,156 99.4%
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%
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
12/30/2021 128 3,871 3,960 24,564 6,876 0 12,000 0
COLORADO RIVER WATER SUPPLY (CRWT)
Date Daily
Intake
MTD YTD Daily Flow MTD Flow Date Time Gage Height
12/30/2021 0 0 9,327 1,300 #N/A 12/31/2021 7:15 AM 8.47
WEATHER RELATED INFORMATION
  Choke Canyon Reservoir Lake Corpus Christi CCR/LCC Combined
  12/30/2021 MTD YTD 12/30/2021 MTD YTD 12/30/2021 MTD YTD
Air Temp 81     79        
Evaporation 111 3,693 76,349 32 3,708 68,990 143 7,401 145,339
Rainfall 0.00 0.11 28.46 0.00 0.38 38.57      
Stream Flows
Gauging Station 12/30/2021 MTD
NTRT Nueces River at Three Rivers, Texas 57 #N/A
NRTT Nueces River at Tilden, Texas 0 #N/A
FRTT Frio River at Tilden, Texas 0 #N/A
SMTT San Miguel Creek at Tilden, Texas 0 #N/A
ARWT Atascosa River at Whitsett, Texas 7 #N/A
CCR Release from Choke Canyon Reservoir 58 #N/A
NRMT Nueces River at Mathis, Texas (La Fruta Bridge) 150 #N/A
NCAT Nueces River at Calallen, Texas 0 #N/A
RBP Rincon Bayou Pipeline 0 #N/A
Reservoir InFlow
Computed as: NRTT+FRTT+SMTT+ARWT 7 #N/A
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 12/01/2021 1,974
Return Flow Credit Effective   #N/A
Required Passthru Monthly Target 4,500   #N/A
Reservoir Inflow #N/A
Estuary Inflows (NCAT + RBP) #N/A
Passthru Surplus / -Deficit #N/A
Report Generated 12/31/2021 at 8:38:03 AM