Regional Board 6 - Lahontan Region	CATEGORY 4A	Draft 2008 California 305(b)/303(d) Integrated Report
7/2/09
2008 CALIFORNIA LIST OF WATER QUALITY LIMITED SEGMENTS
BEING ADDRESSED BY USEPA APPROVED TMDLS

Category 4A Criteria: 1) A water segment where ALL its 303(d) listings are being addressed; and 2) at least one of those listings is being addressed by a USEPA approved TMDL.

* USGS HUC = US Geological Survey Hydrologic Unit Code. Calwater = State Water Resources Control Board hydrological subunit area or even smaller planning watershed.

** "Addressed By" is defined as: B = Being addressed by USEPA approved TMDL and C = Being addressed by action(s) other than a TMDL

REGION	WATER BODY NAME	WATER TYPE	WATERSHED* CALWATER / USGS HUC	POLLUTANT POTENTIAL SOURCES Relevant Notes	ESTIMATED AREA ASSESSED	FIRST YEAR LISTED	ADDRESSED BY**	USEPA TMDL APPROVAL DATE
6	Indian Creek Reservoir	Lake & Reservoir	63220010  /  1.60502e	Phosphorus Erosion/Siltation Flow Regulation/Modification Internal Nutrient Cycling (primarily lakes) Pasture Grazing-Riparian and/or Upland Wastewater	164 Acres	2002	B	2003
				Reservoir is eutrophic. Most significant source of nutrient loading is release of phosphorus from sediment. The USEPA approved the TMDL in 2003. Reductions in internal phosphorus loading from the sediment are expected to ameliorate other problems associated with eutrophication.
6	Squaw Creek	River & Stream	63520011  /  16050102	Sedimentation/Siltation Construction/Land Development Drainage/Filling Of Wetlands Highway Maintenance and Runoff Hydromodification Natural Sources Nonpoint Source Other Urban Runoff Recreational and Tourism Activities (non-boating)	5.8 Miles	1998	B	2007