| Water Body Name: | Rush Creek (below Grant Lake) |
| Water Body ID: | CAR6010004620020530110624 |
| Water Body Type: | River & Stream |
DECISION ID |
32277 |
Region 6 |
Rush Creek (below Grant Lake) |
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| Pollutant: | Temperature, water |
| Final Listing Decision: | Do Not List on 303(d) list (TMDL required list) |
| Last Listing Cycle's Final Listing Decision: | New Decision |
| Revision Status | Revised |
| Impairment from Pollutant or Pollution: | Pollutant |
| Regional Board Staff Conclusion: | This pollutant is being considered for placement on the section 303(d) list under section 3.2 of the Listing Policy. Under section 3.2 a single line of evidence is necessary to assess listing status.
One line of evidence are available in the administrative record to assess this pollutant. 525 of the samples exceed the water quality objective. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the section 303(d) list in the Water Quality Limited Segments category. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. 525 of 8822 samples exceeded the objective and this does not exceed the allowable frequency listed in Table 3.2 of the Listing Policy. 4. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met. |
| Regional Board Staff Decision Recommendation: | After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list because applicable water quality standards are not being exceeded. |
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| LOE ID: | 31957 | ||||
| Pollutant: | Temperature, water | ||||
| LOE Subgroup: | Pollutant-Water | ||||
| Matrix: | Water | ||||
| Fraction: | None | ||||
| Beneficial Use: | Cold Freshwater Habitat | ||||
| Number of Samples: | 8822 | ||||
| Number of Exceedances: | 525 | ||||
| Data and Information Type: | PHYSICAL/CHEMICAL MONITORING | ||||
| Data Used to Assess Water Quality: | There were 525 out of 8,822 samples that exceeded the evaluation guideline for temperature in this water body. | ||||
| Data Reference: | Data for temperature in Rush Creek (below Grant Lake) and Lee Vining Creek, Oct. 1999-Oct. 2008 | ||||
| SWAMP Data: | Non-SWAMP | ||||
| Water Quality Objective/Criterion: | The natural receiving water temperature of all waters shall not be altered unless it can be demonstrated to the satisfaction of the Regional Board that such an alteration in temperature does not adversely affect the water for beneficial uses.(Water Quality Control Plan for the Lahontan Region) | ||||
| Objective/Criterion Reference: | Water Quality Control Plan for the Lahontan Region (as amended) | ||||
| Evaluation Guideline: | Inland Fishes of California (Moyle 1976) states that for rainbow trout the optimum range for growth and completion of most life stages is 13-21 degrees C (page 129). | ||||
| Guideline Reference: | Fish introductions in CA: History and impact on native fishes. Davis, CA: University of CA, Davis | ||||
| Spatial Representation: | Samples were collected at the following locations: -Rush Creek - 395 (At old Highway 395 bridge) -Rush Creek - At Narrows (Main channel of Rush Creek below the Narrows) -Rush Creek - County Road (Main channel of Rush Creek just above the washed out dirt road ford above the County Road) -Rush Creek - MGORD (Approximately 100 ft downstream of footbridge at lower end of MGORD) | ||||
| Temporal Representation: | Samples were collected daily from 10/10/1999 through 10/21/2008. | ||||
| Environmental Conditions: | |||||
| QAPP Information: | Data collection methodology clearly detailed on pages 20-29 in the report titled: Effects of Flow, Reservoir Storage,and Water Temperatures on Trout in Lower Rush and Lee Vining Creeks, Mono County, California (May 2009) Prepared by: Brad Shepard, Ross Ta | ||||
| QAPP Information Reference(s): | |||||