WRIA | County or Counties | Waterbody Name | Designation Boundary | Tier III(A) or III(B) |
4 - Upper Skagit | Skagit | Cascade River and tributaries within the designation boundary. | Upstream from the west boundary of Mount Baker Snoqualmie National Forest (latitude 48.5324, longitude -121.3078) at the west section line of Section 07, Township 35 North, Range 12 East, to headwaters, including tributaries. | Tier III(A) |
26 - Cowlitz | Skamania | Green River and tributaries within designation boundary. | Upstream from the boundary of the Gifford Pinchot National Forest (latitude 46.3484, longitude -122.0938) at the west section line of Section 17, Township 10 North, Range 06 East, to headwaters, including tributaries. | Tier III(A) |
42 - Grand Coulee | Grant | Soap Lake | Latitude 47.4068, longitude -119.4969. | Tier III(B)1 |
45 - Wenatchee | Chelan | Napeequa River and tributaries within the designation boundary. | Upstream from the boundary of the Okanogan-Wenatchee National Forest and private land near river mile 1 (latitude 47.9269, longitude -120.8870) within Section 17, Township 28 North, Range 16 East, to headwaters, including tributaries. | Tier III(A) |
Notes for Table 332 | ||
1 Notes for Soap Lake: | ||
a. Soap Lake measurable change is defined as a decrease in salinity as measured by conductivity of 639 microsiemens per centimeter (µS/cm) or greater. | ||
b. In addition, human actions must not cause lake conductivity to decrease below 19,843 µS/cm as calculated as a seasonal average more than once in 10 years. | ||
c. Seasonal average conductivity is calculated as the arithmetic average of seven or more samples collected April through October. Sampling should be distributed throughout this period. | ||