Our new Biological Assessment is out - Klamath Basin Crisis

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Table 2-7. Upper Klamath Basin Nutrient Loading 2002. Klamath Project Operations Biological Assessment Endangered Suckers: Environmental Baseline for Suckers Location Ammonia NO 2 +NO 3 TKN Ortho P Total P Metric Tons Metric Tons Metric Tons Metric Tons Metric Tons Nutrient Load from UKL (UKL) to the Klamath River UKL at Link Dam 107.0 26.3 778.4 41.4 81.6 Nutrient Load diverted to the Klamath Project from UKL and the Klamath River A-Canal 87.7 24.3 678.6 39.6 70.6 LRDC 16.3 4.7 131.0 5.8 14.2 North Canal 11.9 0.8 55.7 4.2 6.9 Ady Canal 17.4 2.2 113.7 8.0 14.2 Total Load to KP 133.2 32.1 978.9 57.6 105.9 Nutrient Load Returned to the Klamath River from the Klamath Project KSD at Hwy 97 22.3 10.0 147.3 21.8 28.2 Nutrient Load Reduction Within the Klamath Project Net Reduction -110.9 -22.1 -831.6 -35.8 -77.7 All nutrient loads, except for nitrate plus nitrite, are estimates for the period of mid-April 2002 through October 2002. Estimated nitrate plus nitrite (NO 2 +NO 3 ) loads are for the period of mid-April through mid-August. Source: Reclamation, unpublished data Lost River Watershed Clear Lake: Much of the Lost River watershed upstream of Clear Lake is publicly owned under the jurisdiction of the U.S. Forest Service (Modoc National Forest) and the USFWS (Clear Lake National Wildlife Refuge). The condition of the watershed is relatively good because of the management focus of the two agencies on water quality and habitat protection. Several riparian restoration projects have been implemented upstream of Clear Lake, improving stream habitat and water quality. Extremely poor water quality isn’t observed within Clear Lake and its tributaries, therefore this portion of watershed is not currently listed as water quality impaired. However, low DO conditions have been observed during late summer in the East Lobe of Clear Lake near the outlet when lake levels are low and water depth is shallow (Reclamation, unpublished data). These low DO conditions near the outlet occur infrequently and persist for short durations. Figure 2-15 shows daily average DO and temperature for Clear Lake East and West Lobes during 2005 when lake levels were low. 81
Klamath Project Operations Biological Assessment Endangered Suckers: Environmental Baseline for Suckers Figure 2-15. Graph of daily average DO and temperature in the West and East Lobes of Clear Lake. 10 Dissolved Oxygen (mg/L) 8 6 4 5/1/2005 6/1/2005 7/1/2005 8/1/2005 9/1/2005 Clear L East Lobe Clear L West Lobe 10/1/2005 30 Temperature (°C) 25 20 15 10 5/1/2005 6/1/2005 7/1/2005 Source: Reclamation, unpublished data 8/1/2005 9/1/2005 10/1/2005 Gerber Reservoir: In the Gerber Reservoir watershed, about 3/4 of the land is publicly owned under the jurisdiction of the U.S. Forest Service (Fremont National Forest) and the Bureau of Land Management (BLM) (Klamath Resource Area). Severe water quality impairment has not been observed within Gerber Reservoir and its tributaries, but some undesirable water quality conditions do exist. The condition of the watershed upstream of Gerber Reservoir is relatively good because management focuses on the agencies to protect water quality and riparian areas, although Barnes Valley and Lapham creeks are listed for exceeding temperature criteria (ODEQ 1998). The impaired temperature regimes of these creeks are a symptom of degraded riparian and floodplain conditions generally resulting from overgrazing. During summer and early fall, stratification of the water column develops periodically in a small portion of Gerber Reservoir where depth is greatest near the reservoir outlet at the dam. When the reservoir is stratified, DO concentrations of less than 4 mg/L can be observed at depths greater than 5 meters. This stratified condition, and associated hypoxia, typically persists for a short duration over a small portion of the reservoir (Reclamation, unpublished data). Figure 2-16 shows observed DO values in Gerber Reservoir. 82
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Biological Assessment The Effects o
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Biological Assessment The Effects o
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Klamath Project Operations Biologic
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EXECUTIVE SUMMARY This biological a
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Part 1 INTRODUCTION, ACTION AREA, A
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Part 3 COHO SALMON Information abou
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Environmental Baseline Klamath Proj
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T&C 5 T&C 6 T&C 7 T&C 8 Fund instre
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Description Part 5 BALD EAGLES A la
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Figure 5-1. Bald Eagle range in Nor
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Part 7 CONSULTATION HISTORY Section
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Part 9 LITERATURE CITED Agrawal, A.
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Accomplishment Report, Winter 2007.
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