To: Interested Parties

From: Water Resources Branch

RE: December 2004 monthly Water Quality Report

This is the Sabine River Authority Water Quality Report for December 2004. Water quality sampling was performed December 13th through December 16th. Recent weather (previous seven days) in the Sabine River Basin was cool, with daytime highs from the low 50s to the low 70s at Lake Tawakoni and at Lake Fork. Toledo Bend Reservoir and Orange had daytime highs from the high 50s to the mid 70s. 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 high 20s to the low 50s. 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 5.63 and 4.89 inches of rainfall as recorded at Lake Tawakoni and at Lake Fork, respectively. Lake Tawakoni and Lake Fork received 0.38 and 0.39 inches of rainfall the week preceding the sample run. Toledo Bend and Orange received 9.29 and 6.07 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 Upper Basin sites were consistent with water of high quality for the December sample run. The level of Lake Fork was recorded at 402.48 feet msl with 8 cfs releases and the level of Lake Tawakoni was recorded at 437.63 feet msl with 126 cfs releases at the time of sampling. LT23A, SR22, and SR19 exceeded the recommended screening criteria for chlorophyll a. LT23A, LT23C and LT23D had over 100% saturation for dissolved oxygen. High chlorophyll a levels in conjunction with dissolved oxygen saturation values exceeding 100% often indicate algal bloom conditions. LF2 exceeded the recommended screening criteria for orthophosphate. All reservoir and stream sites were within approved Stream Standards levels for E. coli.


Lower Sabine Basin Including Toledo Bend to Morgan Bluff

The December monthly sampling results were indicative of water of high quality at most sites. No rainfall was measured during the seven days prior to sampling. The level of Toledo Bend Reservoir was recorded at 170.29 feet msl with 14,844 cfs discharge at the time of sampling. Most reservoir stations were well mixed with similar readings throughout the water column. All parameters measured were within the Stream Standards criteria.

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 only trace amounts 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, and no anoxic conditions were found at any tidal station. No surface salinities were found at any tidal station and only two stations recorded a salinity value above 1 ppt at any depth. The greatest salinity measured was 13 ppt, found at station SRT1 at a depth of 10.8 meters. All parameters measured were within Stream Standards criteria.

 

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 11:29