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Clean Water Act: Final Agency Action on 32 Total Maximum Daily Loads (TMDLs) in Louisiana

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This notice announces final agency action on 32 TMDLs prepared by EPA Region 6 for waters listed in Louisiana's, Lake Pontchartrain Basin, under Section 303(d) of the Clean Water Act (CWA). Documents from the administrative record file for the 32 TMDLs, including TMDL calculations and responses to comments, may be viewed at The administrative record file may be examined by calling or writing Ms. Diane Smith at the address below. Please contact Ms. Smith to schedule an inspection.


Diane Smith, Environmental Protection Specialist, Water Quality Protection Division, U.S. EPA Region 6, 1445 Ross Avenue, Dallas, TX 75202-2733, (214) 665-2145.


In 1996, two Louisiana environmental groups, the Sierra Club and Louisiana Environmental Action Network (plaintiffs), filed a lawsuit in Federal Court against the EPA, styled Sierra Club, et al. v. Clifford et al., No. 96-0527, (E.D. La.). Among other claims, plaintiffs alleged that EPA failed to establish Louisiana TMDLs in a timely manner. EPA established 32 of these TMDLs pursuant to a consent decree entered in this lawsuit.

EPA Takes Final Agency Action on 32 TMDLs

By this notice EPA is taking final agency action on the following 32 TMDLs on waters located within the Louisiana Lake Pontchartrain Basin:

SubsegmentWaterbody namePollutant
040102Comite River—Wilson-Clinton Hwy to entrance of White Bayou (East Baton Rouge Parish) (Scenic)Fecal Coliform
040103Comite River—Entrance of White Bayou to Amite RiverFecal Coliform.
040201Bayou Manchac—Headwaters to Amite RiverFecal Coliform.
040302Amite River—LA Hwy 37 to Amite River Diversion CanalFecal Coliform.
040304Grays Creek—Headwaters to River AmiteFecal Coliform.
040305Colyell Creek System (includes Colyell Bay)Fecal Coliform.
040503Natalbany River—Headwaters to Tickfaw RiverFecal Coliform.
040504Yellow Water River—Origin to Ponchatoula CreekFecal Coliform.
040505Ponchatoula Creek and Ponchatoula RiverFecal Coliform.
040603Selsers Creek—Origin to South SloughFecal Coliform.
040703Big Creek and Tributaries—Headwaters to confluence with Tangipahoia RiverFecal Coliform.
040909W-14 Main Diversion Canal—from its origin in the north end of the City of Slidell to its junction with Salt BayouFecal Coliform.
040910Salt Bayou—Headwaters to Lake Pontchartrain (Estuarine)Fecal Coliform.
041302Lake Pontchartrain Drainage CanalsFecal Coliform.
041401New Orleans East Leveed Waterbodies (Estuarine)Fecal Coliform.
040501Tickfaw River—From MS State Line to LA Hwy 42 (Scenic)TDS.
040504Yellow Water River—Origin to Ponchatoula CreekTDS.
040301Amite River—MS State Line to LA Hwy 37 (Scenic)TSS.
040401Blind River—From Amite River Diversion Canal to mouth at Lake Maurepas (Scenic)TSS.
040903Bayou Cane—Headwaters to U.S. Hwy 190 (Scenic)TSS.
040303Amite River—Amite River Diversion Canal to Lake MaurepasMercury.
040401Blind River—From Amite River Diversion Canal to mouth at Lake Maurepas (Scenic)Mercury.
040403Blind River—Source to confluence with Amite River Diversion Canal (Scenic)Mercury.
040501Tickfaw River—From MS State Line to LA Hwy 42 (Scenic)Mercury.
040701Tangipahoa River—MS State Line to Interstate Hwy 1-12 (Scenic)Mercury.
040801Tchefuncte River and Tributaries—Headwaters to confluence with Bogue Falaya River (Scenic)Mercury.
040905Bayou Liberty—Headwaters to LA Hwy 433 Mercury.
040906Bayou Liberty—LA Hwy 433 to confluence With Bayou Bonfouca (Estuarine)Mercury.
040505Ponchatoula Creek and Ponchatoula Dissolved RiverOxygen.
041201Bayou LabrancheDissolved Oxygen.
041805Lake Borgne Canal (Violet Canal)Dissolved Oxygen.
041401New Orleans East Leveed WaterbodiesDissolved (Estuarine) Oxygen.

EPA requested the public provide to EPA any significant water quality related data or information that might impact the 32 TMDLs in the Federal Register Notices: volume 76, number 219, pages 70442 and 70443 (November 14, 2011), volume 76, number 234, page 76161 (December 6, 2011), and volume 76, number 247, page 80366 (December 23, 2011). The comments which were received, EPA's response to comments, as well as the TMDLs may be found at

Dated: March 28, 2012.

William K. Honker,

P.E., Acting Director, Water Quality Protection Division, EPA Region 6.

[FR Doc. 2012-8496 Filed 4-9-12; 8:45 am]