To: Interested Parties

From: Water Resources Branch

RE: NOVEMber 2006 monthly Water Quality Report

This is the Sabine River Authority Water Quality Report for November 2006. Water quality sampling was performed November 6th through November 9th. Recent weather (previous seven days) in the Sabine River Basin was cool, with daytime highs in the upper 50s to low 80s at Lake Tawakoni and at Lake Fork. Toledo Bend Reservoir and Orange had daytime highs from the low 60s to the low 80s. Lows ranged from the low 30s to low 60s at Lake Tawakoni and at Lake Fork. Toledo Bend and Orange had lows ranging from the mid 30s to the low 60s. During the 28 days prior to the sample run, the Upper Basin received 6.10 and 4.14 inches of rainfall as recorded at Lake Tawakoni and at Lake Fork, respectively. Lake Tawakoni received 3.52 inches of rain and Lake Fork received 2.03 inches of rain the week preceding the sample run. Toledo Bend and Orange received 22.62 and 21.75 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 November sample run. The level of Lake Fork was recorded at 397.97 feet msl with 33 cfs releases and the level of Lake Tawakoni was recorded at 426.01 feet msl with 6 cfs releases at the time of sampling. Station LT23C exceeded the stream standards numeric criteria for pH. SR22, SR21, LF20, SR19, BS9, SR17, SR16, SR15, SR14 exceeded the numeric criteria for the stream standard for E. coli. All of these sites exhibited increased flows, elevated turbidity and decreased secchi disk transparency due to runoff from area wide rainfall.

 


Lower Sabine Basin Including Toledo Bend to Morgan Bluff

The November monthly sampling results were indicative of water of high quality at most sites. The area received 1.37 inches of rainfall during sampling and the week prior. The level of Toledo Bend Reservoir was recorded at 164.95 feet with 174 cfs discharge at the time of sampling. Most reservoir stations were only slightly stratified with small dissolved oxygen and temperature differences throughout the water column. No anoxic conditions were found at any of the lake stations. The stream standards numeric criteria were not met at station TB8 for chloride, sulfate, and pH. Close to half of the stations in this section of the basin exceeded the criteria for bacteria, most likely due to runoff from the heavy rains received during the week of sampling.

 

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 0.84 inches of rainfall in the seven days prior to the sample event. Surface salinities were found at only one of the Tidal stations. The largest salinity value, 6 ppt, was found at station SRT1 at a depth of 9.6 meters. All parameters measured in the tidal section of the basin fell within the stream standards criteria.

 

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, April 09, 2007 at 11:31