USGS Scientific Investigations Report 2013–5001  - Sources and Characteristics of Organic Matter in the Clackamas River, Oregon, Related to the Formation of Disinfection By-Products in Treated Drinking Water 

Table 2. Description of continuous monitors and sites sampled during monthly sampling and basin-wide surveys, Clackamas River basin, Oregon. 

[Sampling sites–short name: Site locations are shown in figure 1. Abbreviations: NWIS, National Water Information System; CRW, Clackamas River Water; LO, City of Lake Oswego; DWTP, drinking-water treatment plant; USFS, U.S. Forest Service; ~, approximately; –, not applicable] 

Sampling activity				Sampling sites—short name	River mile	NWIS site No.	NWIS site name	Dominant land cover
Monthly	Basin-wide surveys	Continuous water-quality monitor	Streamflow gage	Sampling sites—short name	River mile	NWIS site No.	NWIS site name	Dominant land cover
Main-stem Clackamas River / CRW / LO DWTP sites
			X	Clackamas River at Two Rivers Campground		450156122033100	Upper Clackamas River at Two Rivers C.G., OR	Forested (fir-hemlock dominant); USFS land
			X	Clackamas River agove Three Lynx Creek	47.8	14209500	Clackamas River above Three Lynx Creek, OR	Forested (fir-hemlock dominant); USFS land
X	X	X		Clackamas River at Carter Bridge	40.8	14209710	Clackamas River at Carter Bridge, near Estacada, OR	Forested (fir-hemlock dominant); USFS land
X	X	X	X	Clackamas River at Estacada	23.1	14210000	Clackamas River at Estacada, OR	Mix of forest, rural residential, and urban
	X			Clackamas River at Barton	13.4	452255122244500	Clackamas River near Barton (QW site), OR	Mix of forest, rural residential, and urban
	X			Clackamas River at Carver	7.9	452335122294500	Clackamas River at Carver, OR	Mix of forest, rural residential, and urban
X	X	X		CRW DWTP–Source water	3.1	14211005	Clackamas River at Clackamas, OR (source)	Mix of forest, rural residential, urban, and industrial
X	X			CRW DWTP–Finished water	–	14211006	Clackamas River at Clackamas, OR (finished)	Mix of forest, rural residential, urban, and industrial
		X	X	Clackamas River near Oregon City	1.6	14211010	Clackamas River near Oregon City, OR	Mix of forest, rural residential, urban, and industrial
X	X			LO DWTP–Source water	0.9	14211023	Clackamas River at Gladstone, OR (source)	Mix of forest, rural residential, urban, and industrial
X	X			LO DWTP–Finished water	–	14211024	Clackamas River at West Linn, OR (finished)	Mix of forest, rural residential, urban, and industrial
Tributary sites
			X	Oak Grove Fork near Government Camp	15.5	14208700	Oak Grove Fork near Government Camp, OR	Forested (fir-hemlock dominant); USFS land
			X	Oak Grove Fork above powerplant intake	6.1	14209000	Oak Grove Fork above powerplant intake, OR	Forested (fir-hemlock dominant); USFS land
	X			Eagle Creek	16.7	14210150	Eagle Creek at Bonnie Lure State Park, OR	Forested (alder-fir dominant), regrowth forests/Christmas trees, rural residential
	X			Deep Creek	12.1	452340122251000	Deep Creek at Hwy 224, OR	Agricultural (nurseries, Christmas trees, berries, other crops); regrowth forests
	X			Clear Creek	8	14210750	Clear Creek at Carver, OR	Forested (alder-fir dominant) and rural residential, Christmas trees; regrowth forests
	X			Rock Creek	6.4	14210850	Rock Creek near Carver, OR	Agricultural (nurseries, berries), rural residential
	X			Sieben Creek	5.8	14210900	Sieben Creek at Hwy 224, OR	Residential, industrial
North Fork Reservoir sites
	X			1 - Surface (0.5 foot depth)	31.2	451438122164001	North Fork Res at Boom  Station 1 (Depth 1), OR	Forested (fir-hemlock dominant)
	X			2 - Metalimnion (mid-depth)	31.2	451438122164002	North Fork Res at Boom  Station 1 (Depth 2), OR	Forested (fir-hemlock dominant)
	X			3 - Release depth (~80 feet)	31.2	451438122164003	North Fork Res at Boom  Station 1 (Depth 3), OR	Forested (fir-hemlock dominant)
	X			4 - Hypolimnion (off bottom)	31.2	451438122164004	North Fork Res at Boom  Station 1 (Depth 4), OR	Forested (fir-hemlock dominant)