To: Interested Parties

From: Water Resources Branch

RE: November 2004 monthly Water Quality Report

This is the Sabine River Authority Water Quality Report for November 2004. Water quality sampling was performed November 8th through November 11th. Recent weather (previous seven days) in the Sabine River Basin was mild, with daytime highs from the mid 50s to the low 80s at Lake Tawakoni and at Lake Fork. Toledo Bend Reservoir and Orange had daytime highs from the low 60s to the mid 80s. Lows ranged from the low 40s to the mid 50s at Lake Tawakoni and at Lake Fork. Toledo Bend and Orange had lows ranging from the mid 40s to the upper 60s. The waters of Lake Tawakoni and Lake Fork were mixed, exhibiting no thermal stratification. During the 28 days prior to the sample run, the Upper Basin received 3.38 and 4.45 inches of rainfall as recorded at Lake Tawakoni and at Lake Fork, respectively. Lake Tawakoni and Lake Fork received 0.41 and 0.37 inches of rainfall the week preceding the sample run. Toledo Bend and Orange received 6.27 and 7.97 inches, respectively, 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 November sample run. The level of Lake Fork was recorded at 401.64 feet msl with 8 cfs releases and the level of Lake Tawakoni was recorded at 436.41 feet msl with 6 cfs releases at the time of sampling. LF3, LT23A, LT23C, LT23D and SR19 exceeded the screening criteria for chlorophyll a. LT23C and LT23D also exceeded 100% saturation for dissolved oxygen. High chlorophyll a levels in conjunction with dissolved oxygen saturation values exceeding 100% often indicate algal bloom conditions. All reservoir and stream sites were within stream standard levels for E. coli.


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 only trace amounts of rainfall during the seven days prior to sampling, but over 4 inches just beyond that timeframe. The level of Toledo Bend Reservoir was recorded at 168.75 feet msl with 7,244 cfs discharge at the time of sampling. All reservoir stations were slightly stratified, with pH and dissolved oxygen differences throughout the water column, but no anoxic conditions were found. Station TB6LN had a dissolved oxygen percent saturation that was above the screening criteria. Chlorophyll a results above the screening criteria were also found at stations TB6R and TB6F.

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 7.01 inches of rainfall during the seven days prior to the sample run. Most of the sites in this section of the Basin were well mixed with only slight stratification. No anoxic conditions were found at any tidal station. Surface salinities were only found at two tidal stations with the highest value of 5 ppt found at station BB1. A salinity of 5 ppt was also found at stations ICW1 and SRT1 at their deepest depths. All but two tidal stations recorded Enterococcus results that were above the stream standard criteria. This could be linked to the very heavy rainfall prior to the sample run.

 

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:

 

      Upper Sabine Basin
Terry Wilson, Upper Basin Field Office Coordinator
903-878-2420 (twilson@sra.dst.tx.us)

      Lower and Tidal Sabine Basin
Jerry Wiegreffe, Lower Basin Field Office Coordinator
409-746-3284 (jwiegreffe@sra.dst.tx.us)

      If above are unavailable
John Payne, Special Projects Administrator
409-746-2192 (jpayne@sra.dst.tx.us)
or
Miles Hall, Resource Management/ Project Development Division Manager
409-746-2192 (mhall@sra.dst.tx.us)

 

Printed Monday, May 23, 2005 at 11:24