Draft 2008 California 303(d)/305(b) Integrated Report

Supporting Information

Regional Board 6 - Lahontan Region

Water Body Name: Lee Vining Creek
Water Body ID: CAR6010003519980804142227
Water Body Type: River & Stream
 
DECISION ID
5560
 
Pollutant: Flow alterations
Final Listing Decision: Delist from 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision: Delist from 303(d) list (TMDL required list)(2006)
Revision Status Original
Reason for Delisting: State determines water quality standard is being met
Impairment from Pollutant or Pollution: Pollution
 
Weight of Evidence: Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification in favor of removing this water segment-pollutant combination from the section 303(d) list in the Water Quality Limited Segments category. This conclusion is based on the staff findings that the original listing basis is faulty due to the fact that the listing was not for a pollutant. Additionally, minimum flow requirements are being implemented as mandated by Decision 1631 [Decision And Order Amending Water Right Licenses To Establish Fishery Protection Flows In Streams Tributary To Mono Lake And To Protect Public Trust Resources At Mono Lake And In The Mono Lake Basin, SWRCB, September 28, 1994]
 
RWQCB Board Decision / Staff Recommendation: This is a decision made by the State Water Resources Control Board and approved by the USEPA in 2006 . No new data were assessed by the Regional Board for 2008. The decision has not changed.
 
SWRCB Board Decision / Staff Recommendation:
 
USEPA Decision:
 
 
Lines of Evidence (LOEs) for Decision ID 5560
 
LOE ID: 2837
 
Pollutant: Flow alterations
LOE Subgroup: Testimonial Evidence
Matrix: Not Specified
Fraction: None
 
Beneficial Use: Wildlife Habitat
 
Number of Samples: 0
Number of Exceedances: 0
 
Data and Information Type: Not Specified
Data Used to Assess Water Quality: The original basis for the listing of this water body was data and information contained in the 1993 Mono Basin Water Rights EIR. These data indicated that the long period of little or no flow in Lee Vining Creek, from which Los Angeles Department of Water and Power diverts water, resulted in losses to riparian vegetation and other deterioration of channel conditions.

As a result of Decision 1631 (SWRCB, 1994), minimum flows were mandated in Lee Vining Creek, and considerable restoration work was completed under the supervision of the Restoration Technical Committee at the direction of the El Dorado County Superior Court. Communication with State Board's Division of Water Rights staff (personal communication with Jim Canady, February 3, 2005), indicate that flow requirements are being implemented as mandated. Additionally, listing is not for a pollutant, and no pollutants have been identified. Regional Board staff is not aware of evidence to indicate beneficial use impacts related to this listing.
Data Reference: Placeholder reference 2006 303(d)
 
Water Quality Objective/Criterion:
Objective/Criterion Reference:
 
Evaluation Guideline:
Guideline Reference:
 
Spatial Representation:
Temporal Representation:
Environmental Conditions:
QAPP Information: QA Info Missing
QAPP Information Reference(s):