Sabine River Authority of Texas

To: Interested Parties

From: Water Resources Branch

RE: OCTOber 2006 monthly Water Quality Report

This is the Sabine River Authority Water Quality Report for October 2006. Water quality sampling was performed October 9th through October 12th. Recent weather (previous seven days) in the Sabine River Basin was hot, with daytime highs in the low 80s to mid 90s at Lake Tawakoni and at Lake Fork. Toledo Bend Reservoir and Orange had daytime highs from the low 80s to the low 90s. Lows ranged from the high 40s to high 60s at Lake Tawakoni and at Lake Fork. Toledo Bend and Orange had lows ranging from the low 50s to the high 60s. During the 28 days prior to the sample run, the Upper Basin received 1.47 and 1.19 inches of rainfall as recorded at Lake Tawakoni and at Lake Fork, respectively. Lake Tawakoni and Lake Fork received no rainfall in the week preceding the sample run. Toledo Bend and Orange received 1.31 and 3.90 inches of precipitation during the 28 days prior to the sample run.

 

Upper Sabine Basin Above Toledo Bend Including Lake Fork and Lake Tawakoni

Water quality parameter measurements at the Upper Basin sites were consistent with water of high quality for the October sample run. The level of Lake Fork was recorded at 397.93 feet msl with 33 cfs releases and the level of Lake Tawakoni was recorded at 426.33 feet msl with 6 cfs releases at the time of sampling. The drought throughout the upper basin has kept lake levels low and reduced flow in the river. Stations SR11 and SR10 exceeded the recommended screening criteria for sulfate and chloride. SR17 exceeded the numeric criteria for the stream standard for E. coli.

 


 

Lower Sabine Basin Including Toledo Bend to Morgan Bluff

The October monthly sampling results were indicative of water of high quality at most sites. The area received 1.31 inches of rainfall during the week of sampling. The level of Toledo Bend Reservoir was recorded at 161.53 feet with 174 cfs discharge at the time of sampling. Most reservoir stations were stratified with dissolved oxygen and temperature differences throughout the water column. The stream standards numeric criteria were not met at station TB8 for chloride, and sulfate. Stations SR5 and BCC1 exceeded the criteria for E. coli, station TB6H for pH, and station BA4 for sulfate.

Tidal Section of the Sabine Basin below Morgan Bluff

Most sites sampled in the tidal portion of the Sabine Basin had values that are consistent with water of high quality. The tidal stations received 0.73 inches of rainfall in the day prior to the sample event. Surface salinities were found at each of the tidal stations. The largest salinity value, 16 ppt, was found at station SRT1 at a depth of 9.9 meters. Stations ICW1, BB1, SRT1B, SRT1A, and SRT1 did not meet the standards criteria for Enterococcus. Rainfall in the tidal section of the basin the day prior to sampling could account for the higher bacteriological results.

 

This Report and additional data for these monitoring stations are available on our World Wide Web site (www.sratx.org). If you have any questions or comments concerning this report, please contact:

 

  Upper Sabine Basin
Terry Wilson, Upper Basin Field Office Coordinator
903-878-2420 (twilson@sratx.org)

  Lower and Tidal Sabine Basin
Jerry Wiegreffe, Lower Basin Field Office Coordinator
409-746-3284 (jwiegreffe@sratx.org)

  If above are unavailable
John Payne, Special Projects Administrator
409-746-2192 (jpayne@sratx.org)
or
Miles Hall, Environmental Services Division Manager
409-746-3284 (mhall@sratx.org)

 

Printed Monday, March 19, 2007 at 15:06