To: Interested Parties

From: Water Resources Branch

RE: February 2005 monthly Water Quality Report

This is the Sabine River Authority Water Quality Report for February 2005. Water quality sampling was performed February 7th through February 10th. Recent weather (previous seven days) in the Sabine River Basin was cold, with daytime highs from the low 40s to the low 60s at Lake Tawakoni and at Lake Fork. Toledo Bend Reservoir and Orange had daytime highs from the mid 40s to the upper 60s. Lows ranged from the low 30s to the low 50s at Lake Tawakoni and at Lake Fork. Toledo Bend and Orange had lows ranging from the mid 30s to the upper 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 1.72 and 1.69 inches of rainfall as recorded at Lake Tawakoni and at Lake Fork, respectively. Lake Tawakoni and Lake Fork received 0.52 and 0.42 inches of rainfall the week preceding the sample run. Toledo Bend and Orange received 6.12 and 4.68 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 402.71 feet msl with 8 cfs releases and the level of Lake Tawakoni was recorded at 437.78 feet msl with 236 cfs releases at the time of sampling. Stations LT23A, LF3, SR22 and SR19 exceeded recommended screening criteria for chlorophyll a and stations BS9, SR19, SR17, SR16, SR15, SR14, SR11, 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 run off. 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 February monthly sampling results were indicative of water of high quality at most sites. The area received 2.66 inches of rain during the week of sampling. The level of Toledo Bend Reservoir was recorded at 170.24 feet msl with 15,279 cfs discharge at the time of sampling. Most reservoir stations were well mixed with similar readings throughout the water column. Due to heavy rains during the sample run, stations TB8, TB7A, TB6J, BA4, SR5, SR3, and BCC1 had E. coli results above Stream Standards numeric criteria and station SR5 had a chlorophyll a result above the recommended screening 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 1.33 inches of rainfall during the seven days prior to the sample run, with most falling on the two days prior to sampling. 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. Only one site, BB1, recorded salinity values over 1 ppt. All tidal stations except ICW1 and BB1 displayed high bacteriological results due to the recent rainfall.

 

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 Wednesday, June 08, 2005 at 10:13