SURFACE WATER TARGETS. It appears that the TCE plume is localized and has not migrated northeast towards the Willamette River. However, the plume is undefined to the west and northwest of the Site and groundwater may be impacting the Mary’s River. There is a drinking water intake for the City of Corvallis on the Willamette River about 2 miles upstream of the Site. There is another drinking water intake for Oregon Department of Fish and Wildlife on the Willamette River about 8 miles downstream of the Site and within the 15 mile TDL. According to the Oregon Division of State Lands there are two probable wetlands identified within 7 miles of the Site. Squaw Creek probable wetland is located 2 to 3 miles northwest of the Site and Xxxxxxx-Xxxxxxx probable wetlands is located 6 to 7 miles north of the Site. (See Appendix E for Wetlands Maps) The major use of river water within the 15-mile TDL is for irrigation and recreation. A variety of fish populate the Mary’s River, including threatened anadromous Coho salmon (Oncorhynchus risutch), threatened anadromous spring Chinook salmon (Oncorhynchus tshawytscha), and threatened anadromous winter steelhead (Oncorhynchus mykiss). A variety of fish populate the Willamette River, including threatened anadromous Coho salmon (Oncorhynchus risutch), threatened anadromous spring/fall Chinook salmon (Oncorhynchus tshawytscha), and threatened anadromous spring/winter steelhead (Oncorhynchus mykiss). The Mary’s and Willamette Rivers are not commercially fished but are fished recreationally. The Mary’s and Willamette Rivers are also heavily used for other recreational activities such as boating and swimming.
SURFACE WATER TARGETS. There are no drinking water surface water intakes along the 15-mile TDL. According to the WRD water- rights database (20), there are 3 points of diversion on the Bear Creek downstream of the Site, with use for irrigation or industrial purposes. Primary uses of river water within the 15-mile TDL are for irrigation and recreation. Recreational activities include boating, fishing, swimming, and picnicking. There are several access areas along the Rogue River above and below the Cold Ray Dam, near the extent of the TDL. According to the Oregon Natural Heritage Information Center (21), there are local wetlands designated near the Bear Creek and Rogue River, and in other areas near the Site (See below). Table 4.2.1 Wetland Inventory along TDL 15-mile Total Distance Limit Wetland Frontage Along River (from ORNHIC) Total channel length included in 15-mile TDL (includes side channels and irrigation canals) miles kilometers miles kilometers 15.34 24.68 41.96 67.53 Additional Wetlands are present within the 4-mile radial distance.
SURFACE WATER TARGETS. It appears that the PCE plume in groundwater is localized and is migrating towards the Willamette River. The Willamette River is the presumed discharge point for groundwater at the site. As of 2008, one domestic well located approximately 250 feet from the Willamette River contained PCE at a concentration of 29.5 g/L. The concentration of PCE that may be entering the river from groundwater was not evaluated during this SI. There are no public drinking water intakes in the 15-mile TDL. However, according to WRD there are surface water intakes used for irrigation along this stretch of the river. The major uses of river water within the 15-mile TDL are for irrigation and recreation. Recreational activities include boating, fishing, swimming, and picnicking. There are several access areas along this stretch of the Willamette River including Xxxxxxx Marine Park, Rivers Edge Park, Xxxxxxxxx’x Bar Access, Xxxxxx Rocks Landing, Xxxxxx Bar Access, and Lincoln Access. (See the Willamette River Recreation Guide for part locations at xxxx://xxx.xxxxxxxxxxxxxxxx.xxx/images/pdf/will_river_guide.pdf.) A variety of fish populate the Willamette River, including threatened anadromous coho salmon (Oncorhynchus risutch), threatened anadromous spring/fall chinook salmon (Oncorhynchus tshawytscha), and threatened anadromous summer/winter steelhead (Oncorhynchus mykiss). Within the approximately 300-mile catch reporting area, the annual harvest is comprised of approximately 26,564 fall and spring chinook salmon, 10,645 summer and winter steelhead, and 80 of the other salmonid species. The Willamette River is fished recreationally.
SURFACE WATER TARGETS. The Grande Ronde River is the primary surface water target identified in the site vicinity (Figure 3). The Grande Ronde River is approximately 100 feet north of the site. The Grande Ronde River is considered the primary target because of the potential for groundwater to flow underground to the Grande Ronde River. There are no drinking water intakes on the Grande Ronde River within a distance of 15 miles downstream of the site (EPA SiteInfo Report). No wetlands were identified within 5 miles of the site. The major use of the river water is for irrigation and recreation. A variety of fish populate the Grande Ronde River, including threatened anadromous spring Chinook salmon (Oncorhynchus tshawytscha), threatened anadromous summer steelhead (Oncorhynchus mykiss), and resident threatened bull trout (Salvelinus confluentus). The Grande Ronde River in not commercially fished but is fished recreationally. The Grande Ronde River is also heavily used for other recreation activities such as boating and swimming.
