To:††††† Interested Parties
From:††††† Environmental Services division
This is the Sabine River Authority Water Quality Summary for February 2002. Water quality sampling was performed February 12th through February 14th. Recent weather was cool with a general warming trend towards the end of the 7-day period prior to the sample run.† The Upper Basin received 3.97 Ė 2.99 inches of rainfall during the 28 days since the previous sample run as recorded at Lake Tawakoni and Lake Fork respectively.† Toledo Bend and Orange received 3.6 and 2.04 inches of rain respectively during the 28 days preceding the sample run.† Daytime high air temperatures during the most recent seven days prior to the sample run at Lake Tawakoni and Lake Fork were in the 30ís and 40ís early in the week, rising to the 50ís and 60ís toward the end of the week.† During this same period, Toledo Bend and Orange reported temperatures slightly warmer with daytime highs in the 50ís and 60ís.† The Upper Basin recorded nighttime lows in the 20ís and 30ís while the Lower Basin recorded lows in the 30ís and 40ís.
Upper Sabine Basin Above Toledo Bend Including Lake Fork and Lake Tawakoni
For the February sample run, most of the parameterís values seen at the Upper Basin sites were consistent with water of high quality.† The most recent rains occurred six to seven days prior to sampling.† Water clarity was generally good and, with the cooler temperatures, dissolved oxygen values were at least 10mg/l at all sites.† Bacteriological counts exceeded stream standards at SR19, SR16, SR14 and SR11.† Nitrate/Nitrite concentration was slightly elevated at LT23D on Lake Tawakoni.† This site was also very muddy.† Lake Fork and Lake Tawakoni were completely mixed.
Lower Sabine Basin Including Toledo Bend to Morgan Bluff
The February monthly sampling results were indicative of water of high quality at most sites.† That last significant rainfall occurred about one week prier to the sampling event.† The level of Toledo Bend Reservoir was recorded near pool level at just over 170.2 ft msl, and all the lake sites showed some degree of thermal stratification.† E. coli results that were above stream standards were found at stations TB8, TB6J, and TB6F.
Tidal Section of the Sabine Basin below Morgan Bluff
Stations sampled in the tidal portion of the Sabine Basin had values that were consistent with water of high quality at most sites.† Thermal stratification was not seen at any of the tidal stations as they were all well mixed.† No surface salinities were recorded at any of the sites, but station SRT1 did record a value of 4 ppt at 7 meters and 12 ppt at 10.4 meters, displaying a definite saltwater wedge.† Bacterial values were found to be high at all stations. †Station SR1 recorded an E. coli value above stream standards, and stations ICW1, BB1, SRT2, and SRT1 had Enterococcus values above stream standards.
This Report and additional data for these monitoring stations are available on our World Wide Web site (www.sra.dst.tx.us). If you have any questions or comments concerning this report, please contact:
ō Upper Sabine Basin
John Payne, Upper Basin Field Office Coordinator
ō Lower and Tidal Sabine Basin
Jerry Wiegreffe, Lower Basin Field Office Coordinator
If above are unavailable
Miles Hall, Assistant Division Manager Environmental Services
Printed Wednesday, April 17, 2002