To: Interested Parties
From: Water Resources Branch
This is the Sabine River Authority Water Quality Report for August 2007. Water quality sampling was performed August 13th through August 15th. Recent weather (previous seven days) in the Sabine River Basin was hot, with daytime highs in the low 90s to low 100s at Lake Tawakoni and at Lake Fork. Toledo Bend Reservoir and Orange had daytime highs from the low 90s to the low 100s. Lows ranged from the low 70s to upper 70s at Lake Tawakoni and at Lake Fork. Toledo Bend and Orange had lows ranging from the low 70s to upper 70s. During the 28 days prior to the sample run, the Upper Basin received 1.33 and 2.19 inches of rainfall as recorded at Lake Tawakoni and at Lake Fork, respectively. Lake Tawakoni and Lake Fork received 0.0 inches of rain the week preceding the sample run. Toledo Bend and Orange received 2.57 and 6.92 inches of precipitation during the 28 days prior to the sample run. Reservoir profiles indicated thermal stratification of the water column at deeper reservoir sites in Lake Tawakoni, Lake Fork and Toledo Bend reservoirs.
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 all sites for the August sample run. The level of Lake Fork was recorded at 403.54 feet msl with 19 cfs releases, and the level of Lake Tawakoni was recorded at 437.41 feet msl with 7 cfs releases at the time of sampling. Station LT23D exceeded the stream standards numeric criteria for temperature. Stations LT23A, LT23C, LT23D, LF2, LF3, and LF4 exceeded the stream standards numeric criteria for pH. Elevated pH values in conjunction with higher surface temperatures and increased dissolved oxygen levels often indicate algal bloom conditions. All reservoir and stream sites were within the numeric criteria for the stream standards for E. coli.
The August monthly sampling results were indicative of water of high quality at most sites. The area received no rainfall during the week prior and during the sampling week. The level of Toledo Bend Reservoir was recorded at 171.77 feet with 204 cfs discharge at the time of sampling. Toledo Bend Reservoir stations were stratified in vertical profile samples. Stations TB6K and TB6Q had pH values above the standards criteria.
Section of the
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 no rainfall in the seven days prior to the sample event. Surface salinities were found at only two of the Tidal stations. The largest salinity value, 13.0 ppt, was found at station SRT1 at 10.3 meters. All parameters measured were within the stream standards numeric 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:
Ø Upper Sabine Basin
Terry Wilson, Upper Basin Field Office Coordinator
Ø Lower and Tidal Sabine Basin
Jerry Wiegreffe, Lower Basin Field Office Coordinator
above are unavailable
John Payne, Special Projects Administrator
Miles Hall, Environmental Services Division Manager
Printed Wednesday, February 06, 2008 at 08:45