To: Interested Parties

From: Water Resources Branch

RE: January 2006 monthly Water Quality Report

This is the Sabine River Authority Water Quality Report for January 2006. Water quality sampling was performed January 9th through January 12th. Recent weather (previous seven days) in the Sabine River Basin was mild, with daytime highs in the upper 50s to upper 70s at Lake Tawakoni and at Lake Fork. Toledo Bend Reservoir and Orange had daytime highs from the mid 50s to the upper 70s. Lows ranged from the low 30s to low 50s at Lake Tawakoni and at Lake Fork. Toledo Bend and Orange had lows ranging from the low 30s to the low 60s. The waters of Lake Tawakoni and Lake Fork were thermally mixed. During the 28 days prior to the sample run, the Upper Basin received 0.32 and 0.22 inches of rainfall as recorded at Lake Tawakoni and at Lake Fork, respectively. Lake Tawakoni and Lake Fork received no rain the week preceding the sample run. Toledo Bend and Orange received 3.57 and 2.57 inches of precipitation during the 28 days prior to the sample run.

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

Most water quality parameter measurements at the Upper Basin sites were consistent with water of high quality for the January sample run. The level of Lake Fork was recorded at 398.76 feet msl with 8 cfs releases and the level of Lake Tawakoni was recorded at 429.35 feet msl with 6 cfs releases at the time of sampling. Stations LT23C, LT23D, LT23A, LF3, SR22 and SR19 exceeded the recommended screening criteria for chlorophyll a. Station SR21 exceeded the stream standards numeric criteria for chloride.

Lower Sabine Basin Including Toledo Bend to Morgan Bluff

The January monthly sampling results were indicative of high quality water at most sites. The area received 0.05 inches of rainfall the week prior and during sampling. The level of Toledo Bend Reservoir was recorded at 162.82 feet msl with 174 cfs discharge at the time of sampling. Most reservoir stations were slightly stratified with only small dissolved oxygen and temperature differences throughout the water column. No anoxic conditions were found at any of the lake stations. Stations TB8 and TB7A recorded a chloride and sulfate result above the stream standards numeric criteria, and a nitrate value above the recommended screening criteria. Stations TB6R and SR5 recorded a chlorophyll a result and stations TB8, TB7A, TB6Q, and TB6S recorded a dissolved oxygen percent saturation result above the recommended screening criteria levels.

Tidal Section of the Sabine Basin below Morgan Bluff

Most sites sampled in the tidal portion of the Sabine Basin had values consistent with high quality water. The tidal stations received 0.03 inches of rainfall during the seven days prior to the sample event. Most stations in this section of the Basin showed stratification, but no anoxic conditions were found at any of the stations. Surface salinities were found at all tidal stations. The largest salinity value, 19 ppt, was found at station SRT1 at a depth of 9.8 meters. All parameters measured in the tidal section were within all stream standards numeric criteria and recommended screening criteria.


This Report and additional data for these monitoring stations are available on our World Wide Web site ( 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 (

      Lower and Tidal Sabine Basin
Jerry Wiegreffe, Lower Basin Field Office Coordinator
409-746-3284 (

      If above are unavailable
John Payne, Special Projects Administrator
409-746-2192 (
Miles Hall, Resource Management/ Project Development Division Manager
409-746-2192 (


Printed Thursday, May 11, 2006 at 14:11