Sabine River Authority of Texas


Date: Friday, May 15, 1998
To: Interested Parties
From: Environmental Services
RE: April 1998 Water Quality Monitoring Report

Please find attached the Sabine River Authority Water Quality Report for April 1998. Note that this report is in transition and may be changed from month to month. Any suggestions or comments that you may have are welcome. This report contains three sections an Upper Basin Section (LT23C through SR10), a Lower Basin Section (TB8 through SR2) and a Tidal Section (SRT2 through BLB1).

A table is included with the Report that describes the monitoring stations. Each section of this report includes a table with April data for each station. Also included are graphs of Dissolved Oxygen and Percent Saturation, Fecal Coliforms and Fecal Streptococci, Ammonia and Nitrite & Nitrate. The Report also lists profile data for all lake and tidal sites. At each lake the profile data from one site near the dam is shown graphically and profile data from Pendleton Bridge site at Toledo Bend is also graphed. Weather and flow values for each section show raw daily values and graphs demonstrate rainfall, flow and sampling event. Maps illustrating the sampling locations are also included.

Upper Basin Section (Lake Tawakoni, Lake Fork, and Sabine River Above Toledo Bend)

All values for these stations appear to be within normal ranges and no outstanding values were noted. These values are consistent with water of high quality. All lake sites in Upper Basin have not shown any stratification and are still mixed.

Lower Basin Section (Toledo Bend and Sabine River to Morgan Bluff)

Most values in this area of the Basin exhibited high water quality. Dissolved Oxygen values were high with the exception of Bayou Scie (TB6N). Fecal coliform numbers were also low throughout the Basin, only one site (TB6N) had values above the numerical criteria for stream standards. Ammonia and nitrate & nitrite values were also slightly elevated at Bayou Scie and Anacoco Bayou. However, the highest value for nitrate & nitrite (0.82 mg/L) was at Station TB6F, Sunshine Bay at FM 3121. Monitored main lake sites at Toledo Bend are beginning to stratify. Most secchi disk numbers were high throughout the basin indicating good water transparency. Bayou Anacoco had the lowest secchi disk value, turbidity was also the highest at this location. Chloride and TOC values were also elevated at this site.

Tidal Section (Below Morgan Bluff)

Values for stations in the tidal portion of the Sabine Basin were in a range that was normal and consistent with waters of a high quality. No salinity was detected at any location in this area, and flow at ICW1 Intracoastal Waterway was Orange eastward toward Lake Charles. These facts are probably due to the high flow in the Sabine River.

Additional data for these monitoring stations is available on our World Wide Web site ( If you have any questions or comments concerning this report please contact: