To: Interested Parties

From: Water Resources Branch

RE: January 2005 monthly Water Quality Report

This is the Sabine River Authority Water Quality Report for January 2005. Water quality sampling was performed January 10th through January 13th. Recent weather (previous seven days) in the Sabine River Basin was cool, with daytime highs from the low 30s to the low 70s at Lake Tawakoni and at Lake Fork. Toledo Bend Reservoir and Orange had daytime highs from the low 40s to the upper 70s. Lows ranged from the mid 20s to the mid 60s at Lake Tawakoni and at Lake Fork. Toledo Bend and Orange had lows ranging from the upper 30s to the mid 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 2.76 and 2.85 inches of rainfall as recorded at Lake Tawakoni and at Lake Fork, respectively. Lake Tawakoni and Lake Fork received 1.07 and 1.31 inches of rainfall the week preceding the sample run. Toledo Bend and Orange received 2.42 and 1.87 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. The level of Lake Fork was recorded at 402.89 feet msl with 2,073 cfs releases and the level of Lake Tawakoni was recorded at 438.00 feet msl with 506 cfs releases at the time of sampling. Stations LT23A, LT23D, LT23C, SR22 and SR19 exceeded recommended screening criteria for chlorophyll a, station LT23D exceeded the recommended screening criteria for orthophosphate, and stations LF20, BS9, SR21, SR19, SR17, SR16, SR15, SR14 and SR10 exceeded Stream Standards numeric criteria for E. coli. The sites that exceeded numeric criteria for E. coli also exhibited higher than normal turbidities and low secchi depths due to suspended sediment from rainfall runoff. An increase in E. coli numbers is usually accompanied by higher turbidity values and low secchi depths.


Lower Sabine Basin Including Toledo Bend to Morgan Bluff

The January monthly sampling results were indicative of water of high quality at most sites. The area received 0.38 inches of rain during the seven days prior to sampling. The level of Toledo Bend Reservoir was recorded at 168.87 feet msl with 7,744 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 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 consistent with water of high quality. The tidal stations received only trace amounts of rainfall during the seven days prior to the sample run, but 0.5 inch was recorded during the actual sampling day. Most sites in this section of the Basin were well mixed with only slight stratification, and no anoxic conditions were found at any tidal station. A surface salinity of 2 ppt was found at Stations BB1 and SRT1. The greatest salinity measured was 4 ppt, found at station SRT1 at a depth of 10.6 meters. Station BB1 displayed bacteriological results that were above 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 Friday, June 03, 2005 at 07:20