To: Interested Parties

From: Water Resources Branch

RE: DECEMber 2006 monthly Water Quality Report

This is the Sabine River Authority of Texas Water Quality Report for December 2006. Water quality sampling was performed December 11th through December 14th. Recent weather (previous seven days) in the Sabine River Basin was cold, with daytime highs in the upper 30s to mid 60s at Lake Tawakoni and at Lake Fork. Toledo Bend Reservoir and Orange had daytime highs from the mid 40s to the upper 70s. Lows ranged from the upper teens to low 40s at Lake Tawakoni and at Lake Fork. Toledo Bend and Orange had lows ranging from the low 20s to the mid 50s. During the 28 days prior to the sample run, the Upper Basin received 0.67 and 0.92 inches of rainfall as recorded at Lake Tawakoni and at Lake Fork, respectively. Lake Tawakoni received 0.14 inches of rain and Lake Fork received 0.30 inches of rain the week preceding the sample run. Toledo Bend and Orange received 1.5 and 0.45 inches of precipitation, respectively 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 at most sites for the December sample run. The level of Lake Fork was recorded at 397.62 feet msl with 31 cfs releases and the level of Lake Tawakoni was recorded at 425.08 feet msl with 6 cfs releases at the time of sampling. Station BS9 exceeded the numeric criteria for the stream standard for E. coli. Station SR11 exceeded the recommended screening criteria for sulfate.

Lower Sabine Basin Including Toledo Bend to Morgan Bluff

The December monthly sampling results were indicative of water of high quality at most sites. The area received 1.38 inches of rainfall during the sampling week. The level of Toledo Bend Reservoir was recorded at 165.03 feet with 174 cfs discharge at the time of sampling. Several 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, pH, and E. coli. In addition to TB8, six other lower basin sites exceeded the numeric stream standards for E. coli. Heavy rains received in the lower basin during the week of sampling are the most probable cause for these higher than normal bacteriological results.

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 0.16 inches of rainfall in the seven days prior to the sample event. Surface salinities were found at all but one of the Tidal stations. The largest salinity value, 18 ppt, was found at stations SRT1 and SRT1B at their deepest depths. All parameters measured in the tidal portion of the basin met 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 Friday, April 27, 2007 at 15:37