USGS Scientific Investigations Report 2010–5154 - Use of Stable Isotopes of Carbon and Nitrogen to Identify Sources of Organic Matter to Bed Sediments of the Tualatin River, Oregon

Table 1. Summary of sample collection at each sampling site, Tualatin River basin, Oregon.

[Location of map No. is shown in figure 2. Gray shading indicates collection of sample. BS, bed sediment; SS, suspended sediment; Ses, seston. Access: C, canoe; B, Bridge; W, wading; T, terrestrial; O, other. RM, river mile]

Map No.	Site name	Access	Late-summer 1998			Mid-summer 1999			Late-summer 1999			Winter 2000			Early-summer 2000			Other
Map No.	Site name	Access	BS	SS	Ses	BS	SS	Ses	BS	SS	Ses	BS	SS	Ses	BS	SS	Ses	Other
Mainstem sites
1	Tualatin River at RM 5.5 (Stafford Road)	C, B
2	Tualatin River at RM 8.7 (Boones Ferry Bridge)	C
3	Tualatin River at RM 9.4 (Basalt sill)	C
4	Tualatin River at RM 9.9 (Cook Park)	C
5	Tualatin River at RM 16.2 (Elsner Bridge)	B
6	Tualatin River at RM 20.3	C
7	Tualatin River at RM 24.5	T
8	Tualatin River at RM 26.9 (Scholls)	C, B
9	Tualatin River at RM 38.4 (Rood Bridge)	C, B
10	Tualatin River at RM 58.8 (Dilley)	W, B
11	Tualatin River at RM 67.8 (Cherry Grove)	T
Tributary sites
12	Fanno Creek at Durham Road	B
13	Fanno Creek at Durham City Park	W
14	Rock Creek at Highway 8	W, B
15	Dairy Creek at Highway 8	W, B
16	Gales Creek at old Highway 47	W, B
17	Henry Hagg Lake	C
Other sites
18	Durham Wastewater Treatment Facility	O
19	Onion Flat (Cipole Road and Highway 99W)	T
20	Tualatin Nature Park	T
21	Oregon Graduate Institute (near Bronson Creek)	T
22	Rock Creek Wastewater Treatment Facility	O
23	Jackson Bottom (between Miller Swale and holding pond)	T
24	Zurcher Farm (Fernhill Road near Tualatin River)	T
25	Patton Valley Road (north side, 1 mi east of Cherry Grove)	T