To: Interested Parties

From: Water Resources Branch

RE: March 2005 monthly Water Quality Report

This is the Sabine River Authority Water Quality Report for March 2005. Water quality sampling was performed March 7th through March 10th. Recent weather (previous seven days) in the Sabine River Basin was cool, with daytime highs from the low 50s to the mid 70s at Lake Tawakoni and at Lake Fork. Toledo Bend Reservoir and Orange had daytime highs from the low 50s to the low 70s. Lows ranged from the low 30s to the low 60s at Lake Tawakoni and at Lake Fork. Toledo Bend and Orange had lows ranging from the mid 30s 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 2.47 and 1.17 inches of rainfall as recorded at Lake Tawakoni and at Lake Fork, respectively. Lake Tawakoni and Lake Fork received 0.22 and 0.06 inch of rainfall the week preceding the sample run. Toledo Bend and Orange received 5.59 and 5.65 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 402.69 feet msl with 8 cfs releases and the level of Lake Tawakoni was recorded at 437.51 feet msl with 6 cfs releases at the time of sampling. Stations LT23A, LT23D, SR22, and SR19 exceeded recommended screening criteria for chlorophyll a, and station LT23A had a high level of dissolved oxygen with greater than 100 percent dissolved oxygen saturation. Elevated chlorophyll a levels and high dissolved oxygen with greater than 100 percent dissolved oxygen saturation indicates algal bloom conditions. All reservoir and stream sites were within Stream Standards numeric critera for E. coli.


Lower Sabine Basin Including Toledo Bend to Morgan Bluff

The March monthly sampling results were indicative of water of high quality at most sites. The area received 0.74 inch of rain during the week of sampling. The level of Toledo Bend Reservoir was recorded at 169.85 feet msl with 7,449 cfs discharge at the time of sampling. Most reservoir stations were well mixed with similar readings throughout the water column. Stations TB7A, BA4, SR3, and BCC1 had E. coli results greater than Stream Standards numeric criteria and station TB6R had a chlorophyll a result above recommended screening criteria. Station TB6Q had over 100% saturation of dissolved oxygen, possibly indicating an algal bloom at that location.

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 0.27 inch 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 salinity values over 1 ppt were recorded at any of the tidal stations, and all parameters measured in this section of the basin were within the 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 Wednesday, June 08, 2005 at 10:32