To: Interested Parties

From: Environmental Services Division

RE: MAy 2008 monthly Water Quality Report

The Environmental Services Field Offices conducted water quality monitoring in the Sabine Basin from May 12^th through 14^th. The results of the field monitoring are presented in this report and additional laboratory results will be included in the annual Sabine Basin Water Quality Report.

Sabine Basin Tidal (Including Tributaries)

Weather - Weather conditions in the Tidal Basin were warm with highs from the upper 70s to the upper 80s. Low temperatures ranged from the low 50s to the low 70s. The Tidal stations received 0.23 inches of rainfall in the seven days prior to the sampling event.

Tidal Conditions - Surface salinities were found at three of the Tidal stations. The largest salinity value, 7.23 ppt, was found at Sabine River station SRT1B at 10.2 meters.

Lower Sabine Basin (Toledo Bend Reservoir and Below)

Weather - Weather conditions in the Lower Basin were warm with highs from the low 70s to the low 90s. Low temperatures ranged from the upper 40s to low 70s. Toledo Bend received 0.14 inches of rainfall during the seven days prior to the sampling event.

Lake Level - The level of Toledo Bend Reservoir was recorded at 171.81 feet with 204 cfs discharge at the time of sampling. Toledo Bend has a conservation pool level of 172ft msl. Reservoir profiles indicated stratification of the water column.

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

Weather - Recent weather (previous seven days) in the Sabine River Basin was mild, with daytime highs in the low 70s to upper 80s with lows in the mid 40s to mid 60s at Lake Tawakoni and at Lake Fork. Lake Tawakoni received 0.52 inches of rain and Lake Fork received 0.38 inches of rain the week preceding the sample run.

Lake Level - The level of Lake Tawakoni was 438.63 feet msl with a 120 cfs release and the level of Lake Fork was 402.72 feet msl with a 8 cfs release at the time of sampling. Lake Tawakoni and Lake Fork have conservation pool levels of 437.5 msl and 403 msl, respectively. Reservoir profiles indicated thermal mixing of the water column at Lake Tawakoni and Lake Fork.

This Report and additional data for these monitoring stations are available on our World Wide Web site (www.sratx.org). If you have any questions or comments concerning this report, please contact:

Ø Miles Hall, Environmental Services Division Manager
409-746-3284 (mhall@sratx.org)

Ø Lower and Tidal Sabine Basin
Jerry Wiegreffe, Lower Basin Field Office Coordinator
409-746-3284 (jwiegreffe@sratx.org)

Ø Upper Sabine Basin
Terry Wilson, Upper Basin Field Office Coordinator
903-878-2420 (twilson@sratx.org)

SABINE RIVER AUTHORITY OF TEXAS

Monthly Water Quality Report

Table of Contents

Fixed Monitoring Stations. 4

Segment 0501 – Sabine River Tidal 5

Segment 0502 - Sabine River Above Tidal 7

Segment 0503 - Sabine River Above Caney Creek. 8

Segment 0504 – Toledo Bend Reservoir. 9

Segment 0505 - Sabine River Above Toledo Bend Reservoir. 13

Segment 0506 - Sabine River Below Lake Tawakoni 14

Segment 0507 - Lake Tawakoni 18

Table of Figures

Toledo Bend Reservoir Profiles. 11

Segment 0504. 12

Segment 0505. 13

Lake Fork Reservoir Profiles. 15

Segment 0506. 17

Lake Tawakoni Profiles. 18

Segment 0507. 20

Sabine Basin Map

Fixed Monitoring Stations

Segment	Station TCEQ ID (SRA-TX ID	Location
501	10391 (SRT1)	SABINE RIVER AT CHANNEL CAN 3
501	15654 (BB1)	BLACK BAYOU IN CAMERON PARISH
501	10393 (SRT1A)	SABINE RIVER AT CHANNEL LIGHT 13
501	18055 (SRT1B)	SABINE RIVER AT CHANNEL LIGHT 20
501	15653 (ICW1)	INTERCOASTAL WATERWAY AT PERRY RIDGE
501	18056 (SRT1C)	OLD HWY 90
501	10394 (SRT2)	SABINE RIVER AT IH 10
501	10395 (SR1)	SABINE RIVER 12.00 KM UPSTREAM OF IH 10
502	10397 (SR2)	SABINE RIVER AT SH 12 NORTH OF DEWEYVILLE TX.
513	10465 (BCC1)	BIG COW CREEK AT FM 1416 SOUTH OF BON WIER
503	10398 (SR3)	SABINE RIVER AT US 190 EAST OF BON WIER TX.
503	10340 (BA4)	ANACOCO BAYOU AT LOUISIANA HWY 111 CROSSING SOUTHWEST OF KNIGHT LA
503	10399 (SR5)	SABINE RIVER AT SH 63 EAST OF BURKEVILLE TX.
503	10401 (TB6S)	SABINE RIVER BELOW TOLEDO BEND RESERVOIR AT RIGHT ABUTMENT OF SPILLWAY FOR DAM
503	15660 (BT1)	BAYOU TORO AT LA SH 392 IN SABINE PARISH SW OF HORNBECK LA
504	10404 (TB6A)	TOLEDO BEND RESERVOIR MAIN LAKE ABOVE THE DAM AT THE OLD RIVER CHANNEL
504	10407 (TB6CN)	TOLEDO BEND RESERVOIR IN SIX MILE BOAT LANE AT SH87
504	18054 (TB6Q)	TOLEDO BEND RESERVOIR IN NEGREET BAYOU
504	10411 (TB6F)	TOLEDO BEND RESERVOIR IN SUNSHINE BAY NEAR FM3121 BRIDGE
504	10402 (TB6H)	TOLEDO BEND RESERVOIR AT SH 21 NORTHEAST OF MILAM
504	15659 (TB6K)	TOLEDO BEND RESERVOIR IN LANANA BAYOU AT LOUISIANA SH 191 IN SABINE PARISH LOUISIANA WEST OF MANY
504	15655 (TB6J)	TOLEDO BEND RESERVOIR PATROON BAYOU BRANCH AT FM 276
504	18053 (TB6LN)	TOLEDO BEND RESERVOIR SAN MIGUEL ARM BOAT LANE
504	18052 (TB6R)	TOLEDO BEND RESERVOIR AT RAGTOWN
504	10403 (TB8)