Skip Links

USGS - science for a changing world

Scientific Investigations Report 2010–5154

>> Pubs Warehouse > 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 6. Mean values and confidence intervals of stable isotope compositions (δ13C, δ15N) and C/N ratios for samples collected in the Tualatin River basin, Oregon.

[Abbreviations: RM, river mile; n, number of splits used in calculation of mean and confidence interval; 95% CI, 95-percent confidence limit of mean; low-N n, number of splits that contained less than 1 micromole N; 1-sf n, number of splits in which the percent nitrogen value had only 1 significant digit; WWTF, wastewater treatment facililty; µm, micrometer; na, not applicable]

ID Site name Sample type Sample detail Date δ13C δ15N C/N atomic ratio
Mean 95%CI n Mean 95%CI n low-N 
n Mean 95%CI n 1-sf 
n
Late-Summer 1998
401 Tualatin River at RM 5.5 (Stafford Road) Seston, >80 μm – 08-13-98 -35.03 0.11 6 9.34 0.33 6 0 5.39 0.38 6 0
402 Tualatin River at RM 5.5 (Stafford Road) Periphyton Species not identified 08-13-98 -33.15 0.75 4 12.90 1.04 4 0 4.95 1.34 4 0
403 Tualatin River at RM 20.3 Periphyton Species not identified 08-18-98 -18.42 0.22 3 5.80 0.44 3 0 11.68 1.12 3 0
404 Henry Hagg Lake Seston, >80 μm – 08-11-98 -26.34 0.24 4 6.90 0.46 4 0 10.33 1.09 4 0
405 Tualatin River at RM 24.5 Duckweed Duckweed sorted from mat 09-29-98 -29.44 0.12 4 6.82 0.34 4 0 11.85 0.94 4 0
406 Tualatin River at RM 5.5 (Stafford Road) Suspended sediment – 09-17-98 -33.08 0.28 3 7.38 0.44 3 0 7.69 1.53 3 0
407 Tualatin River at RM 26.9 (Scholls) Suspended sediment – 09-17-98 -27.95 0.21 4 4.93 0.50 4 0 11.40 1.45 4 0
408 Tualatin River at RM 5.5 (Stafford Road) Bed sediment – 08-20-98 -28.03 0.36 9 4.32 0.67 9 2 16.22 2.43 9 4
409 Tualatin River at RM 26.9 (Scholls) Bed sediment – 08-18-98 -27.52 0.29 9 3.79 1.02 9 0 17.52 3.29 9 4
410 Jackson Bottom (between Miller Swale and holding pond) Soil Chehalis soil 10-06-98 -26.64 0.18 4 5.44 0.41 4 0 12.38 0.84 4 0
411 Zurcher Farm (Fernhill Road near Tualatin River) Soil Wapato soil 10-06-98 -26.06 0.09 7 5.08 0.83 7 0 12.81 1.03 7 0
412 Oregon Graduate Institute (near Bronson Creek) Soil Woodburn soil 10-06-98 -27.20 0.13 3 -0.87 0.93 3 0 24.60 1.63 3 0
413 Jackson Bottom (between Miller Swale and holding pond) Leaf litter Oregon Ash leaf litter 10-06-98 -30.41 0.14 4 2.19 0.25 4 0 29.08 2.72 3 0
414 Tualatin River at RM 67.8 (Cherry Grove) Coniferous litter Western Red Cedar litter 10-06-98 -26.80 0.39 3 -0.20 0.98 3 0 46.53 8.83 3 0
415 Tualatin River at RM 67.8 (Cherry Grove) Leaf litter Alder leaf litter 10-06-98 -29.50 0.13 4 -1.64 0.10 4 0 32.93 2.29 4 0
416 Patton Valley Road (north side, 1 mi east of Cherry Grove) Coniferous litter Douglas Fir litter 10-06-98 -27.41 0.14 4 -0.55 0.23 4 0 67.04 2.10 4 0
417 Patton Valley Road (north side, 
1 mi east of Cherry Grove) Woody material Douglas Fir twigs 10-06-98 -26.48 0.42 4 -2.87 0.14 4 1 77.75 27.70 4 0
418 Rock Creek Wastewater Treatment Facility WWTF effluent particulate – 10-06-98 -26.64 0.16 4 11.61 1.03 4 0 5.47 1.77 4 0
419 Tualatin River at RM 5.5 (Stafford Road) Bryozoan – 08-13-98 -35.36 0.32 4 16.13 1.34 4 0 4.24 1.34 4 0
Mid-Summer 1999
1 Henry Hagg Lake Seston, >80 μm – 07-09-99 -29.06 0.38 4 7.04 0.48 4 0 5.41 0.86 4 0
2 Henry Hagg Lake Seston, 80–202 μm – 07-09-99 -28.91 0.34 3 6.33 0.53 3 0 5.83 0.18 3 0
3 Tualatin River at RM 20.3 Seston, >80 μm – 07-14-99 -30.46 0.16 3 7.77 0.63 3 0 11.35 1.07 3 0
4 Tualatin River at RM 20.3 Seston, 80–202 μm – 07-14-99 -30.70 0.15 4 7.75 0.93 4 0 10.19 1.02 4 0
5 Tualatin River at RM 20.3 Duckweed Duckweed sorted from mat 07-14-99 -28.65 0.14 3 10.48 0.81 3 0 14.61 1.00 3 0
6 Tualatin River at RM 20.3 Woody material Twigs sorted from duckweed mat 07-14-99 -29.03 0.78 3 2.65 0.48 3 0 31.62 5.83 3 0
7 Tualatin River at RM 20.3 Suspended sediment – 07-14-99 -32.24 0.31 4 8.99 0.52 4 0 7.61 1.16 4 0
8 Tualatin River at RM 20.3 Bed sediment – 07-14-99 -27.46 0.12 3 5.63 3.01 2 0 14.67 1.74 3 2
10 Tualatin River at RM 20.3 Coniferous litter Cones sorted from duckweed mat 07-14-99 -27.25 0.35 3 0.16 3.34 3 3 110.57 25.40 3 0
12 Tualatin River at RM 20.3 Leaf litter Oregon Ash seed pods from river surface 07-14-99 -25.55 0.31 4 1.51 0.75 4 1 64.88 15.43 4 0
13 Tualatin River at RM 20.3 Leaf litter Oregon Ash leaves from river surface 07-14-99 -27.06 0.40 3 0.88 0.75 3 0 30.96 3.81 3 0
14 Tualatin River at RM 26.9 (Scholls) Seston, >80 μm – 07-14-99 -28.51 0.13 3 6.67 0.60 3 0 16.55 2.43 3 0
15 Tualatin River at RM 26.9 (Scholls) Seston, 80–202 μm – 07-14-99 -28.27 0.18 3 6.24 0.57 3 2 17.23 0.99 3 0
16 Tualatin River at RM 26.9 (Scholls) Suspended sediment – 07-14-99 -28.55 0.28 4 6.81 0.91 4 2 9.47 1.33 4 0
17 Tualatin River at RM 26.9 (Scholls) Bed sediment – 07-14-99 -27.51 0.38 3 5.89 0.70 3 0 14.73 2.24 3 0
18 Tualatin River at RM 26.9 (Scholls) Duckweed Duckweed sorted from mat 07-14-99 -28.48 na 1 9.32 na 1 0 12.00 na 1 0
19 Tualatin River at RM 26.9 (Scholls) Woody material Twigs sorted from duckweed mat 07-14-99 -26.45 0.84 3 5.36 0.81 3 0 28.31 2.00 3 0
20 Tualatin River at RM 38.4 
(Rood Bridge) Suspended sediment – 07-14-99 -28.14 0.11 4 6.41 0.35 4 0 10.49 0.92 4 0
21 Tualatin River at RM 38.4 
(Rood Bridge) Bed sediment – 07-14-99 -26.74 0.46 3 4.81 0.61 3 0 13.66 1.20 3 3
22 Gales Creek at Old Highway 47 Suspended sediment – 07-16-99 -26.39 0.14 3 4.60 0.48 3 0 8.60 1.30 3 0
23 Gales Creek at Old Highway 47 Bed sediment – 07-16-99 -27.15 0.15 4 2.62 0.63 4 4 14.61 4.16 4 4
24 Dairy Creek at Highway 8 Suspended sediment – 07-16-99 -29.59 0.18 3 6.17 0.36 3 0 8.91 1.32 3 0
25 Dairy Creek at Highway 8 Bed sediment – 07-16-99 -26.92 0.46 3 4.30 0.51 2 1 16.50 2.52 3 2
26 Tualatin River at RM 58.8 (Dilley) Suspended sediment – 07-16-99 -27.63 0.53 3 4.10 0.74 3 3 11.08 3.22 3 3
27 Tualatin River at RM 58.8 (Dilley) Bed sediment – 07-16-99 -27.06 0.33 3 2.71 0.69 3 3 15.35 2.75 3 3
28 Rock Creek at Highway 8 Suspended sediment – 07-16-99 -29.21 0.31 3 5.22 1.69 3 1 10.31 1.66 3 0
29 Rock Creek at Highway 8 Bed sediment – 07-16-99 -27.98 0.13 3 5.81 0.69 3 0 15.31 1.05 3 0
30 Tualatin River at RM 5.5 (Stafford Road) Suspended sediment – 07-16-99 -35.41 0.18 3 9.11 0.73 3 0 5.78 1.41 3 0
31 Tualatin River at RM 5.5 (Stafford Road) Seston, >80 μm – 07-19-99 -37.46 0.23 3 9.01 0.63 3 0 5.87 1.39 3 0
32 Tualatin River at RM 5.5 (Stafford Road) Seston, 80–202 μm – 07-19-99 -37.64 0.05 4 9.22 0.57 4 0 5.92 0.44 4 0
33 Tualatin River at RM 5.5 (Stafford Road) Bed sediment – 07-19-99 -27.41 0.72 4 5.74 1.17 3 0 12.35 1.96 4 0
34 Tualatin River at RM 5.5 (Stafford Road) Periphyton Spirogyra 07-19-99 -17.36 0.22 3 6.87 0.55 3 0 10.64 1.03 3 0
35 Tualatin River at RM 9.9 
(Cook Park) Seston, >80 μm – 07-19-99 -35.05 0.20 3 8.25 0.54 3 0 7.29 1.33 3 0
36 Tualatin River at RM 9.9
(Cook Park) Seston, 80–202 μm – 07-19-99 -34.99 0.33 3 9.10 1.01 3 3 6.92 1.41 3 0
37 Tualatin River at RM 9.9 
(Cook Park) Suspended sediment – 07-19-99 -34.98 0.12 4 7.29 0.82 3 0 6.86 0.78 5 0
38 Tualatin River at RM 9.9 
(Cook Park) Bed sediment – 07-19-99 -28.16 0.22 6 5.48 0.29 6 6 13.97 1.54 6 6
39 Tualatin River at RM 9.9 
(Cook Park) Duckweed Unsorted duckweed mat 07-19-99 -28.50 0.33 4 3.20 0.33 4 0 27.21 1.32 4 0
40 Tualatin River at RM 9.9 
(Cook Park) Duckweed Duckweed sorted from mat 07-19-99 -29.85 0.06 3 6.90 0.39 3 0 11.25 1.00 3 0
41 Tualatin River at RM 9.9 
(Cook Park) Woody material Twigs sorted from duckweed mat 07-19-99 -27.82 1.11 6 2.30 0.15 6 0 29.96 0.41 6 0
42 Tualatin River at RM 9.9 
(Cook Park) Coniferous litter Cones sorted from duckweed mat 07-19-99 -26.55 0.05 3 0.72 1.03 3 3 90.52 16.79 3 0
43 Tualatin River at RM 9.9 
(Cook Park) Soil A-horizon from bank with slump 07-19-99 -26.10 0.22 3 1.38 1.12 3 0 29.92 3.08 3 0
44 Tualatin River at RM 9.9 
(Cook Park) Soil Bottom of slump at water edge 07-19-99 -27.12 0.28 3 5.29 1.71 4 4 14.29 3.14 4 4
45 Tualatin River at RM 8.7 
(Boones Ferry Bridge) Seston, >80 μm – 07-19-99 -34.88 0.21 3 10.58 0.99 3 0 7.61 1.24 3 0
46 Tualatin River at RM 8.7 
(Boones Ferry Bridge) Seston, 80–202 μm – 07-19-99 -34.83 0.26 3 10.88 1.15 3 3 7.65 1.45 3 0
47 Tualatin River at RM 8.7 
(Boones Ferry Bridge) Suspended sediment – 07-19-99 -35.82 0.13 4 12.19 1.11 4 0 6.96 1.16 4 0
48 Tualatin River at RM 8.7 
(Boones Ferry Bridge) Bed sediment – 07-19-99 -27.84 1.00 4 5.57 1.59 4 4 13.77 2.12 4 4
49 Tualatin River at RM 16.2 (Elsner Bridge) Suspended sediment Fraction that settled after 24 hours 07-21-99 -29.79 0.68 4 5.55 1.31 3 0 9.06 0.87 4 0
50 Tualatin River at RM 16.2 (Elsner Bridge) Seston, >80 μm Aphanizomenon floating on sample 07-21-99 -34.42 0.32 3 7.58 0.64 3 0 4.37 1.63 3 0
51 Tualatin River at RM 16.2 (Elsner Bridge) Seston, >80 μm – 07-21-99 -29.36 0.39 7 na na 0 0 12.35 0.53 7 0
52 Tualatin River at RM 16.2 (Elsner Bridge) Seston, 80–202 μm – 07-21-99 -30.45 0.49 3 5.98 0.94 3 3 10.07 1.27 3 0
53 Tualatin River at RM 16.2 (Elsner Bridge) Bed sediment – 07-21-99 -27.18 0.87 3 5.20 0.62 3 1 17.02 4.70 3 3
54 Tualatin River at RM 16.2 (Elsner Bridge) Woody material Twigs removed from bed sediment 07-21-99 -27.01 0.62 4 4.56 0.47 4 4 91.83 12.02 2 0
55 Fanno Creek at Durham 
City Park Suspended sediment Fraction that settled after 24 hours 07-21-99 -29.01 0.54 4 4.82 1.42 4 0 13.52 0.54 4 0
56 Fanno Creek at Durham 
City Park Seston, >80 μm – 07-21-99 -28.74 0.64 6 6.26 1.00 6 6 13.06 1.29 6 0
57 Fanno Creek at Durham 
City Park Seston, 80–202 μm – 07-21-99 -28.41 0.47 3 5.37 0.45 3 3 14.43 1.02 3 0
58 Fanno Creek at Durham 
City Park Bed sediment – 07-21-99 -28.01 0.18 4 3.57 0.78 4 4 14.58 4.04 4 4
59 Fanno Creek at Durham 
City Park Bed sediment Top 10 cm, both oxic and anoxic fractions 07-21-99 -27.99 0.30 3 3.56 0.88 3 0 17.42 4.00 3 0
60 Fanno Creek at Durham 
City Park Leaf litter Redtwig dogwood leaves in stream 07-21-99 -29.60 0.17 3 4.46 0.53 3 0 33.94 2.90 3 0
61 Fanno Creek at Durham 
City Park Leaf litter Oregon Ash leaves in stream 07-21-99 -26.80 0.10 3 3.17 0.54 3 0 51.42 9.59 3 0
62 Fanno Creek at Durham 
City Park Decomposed terrestrial detritus Decomposed leaves & twigs in stream 07-21-99 -27.85 0.43 3 4.92 0.74 3 0 22.21 4.13 3 0
63 Fanno Creek at Durham 
City Park Leaf litter Oregon Ash leaves from trail 07-21-99 -27.29 0.91 3 0.88 0.37 4 0 19.95 5.21 2 0
64 Fanno Creek at Durham 
City Park Leaf litter Oregon Ash seed pods from trail 07-21-99 -26.80 0.95 5 0.80 0.44 5 0 46.79 4.19 5 0
65 Fanno Creek at Durham 
City Park Periphyton Cladophera 07-21-99 -39.69 0.11 3 4.56 0.31 3 0 8.00 1.21 3 0
67 Tualatin River at RM 9.4 
(Basalt sill) Periphyton Cladophera 07-19-99 -34.14 0.15 3 5.50 0.39 3 0 11.02 1.10 3 0
68 Onion Flat (Cipole Road 
and Highway 99W) Soil Agricultural field, tilled, not planted 07-21-99 -27.87 0.13 2 4.81 1.02 3 0 17.40 1.58 3 0
69 Jackson Bottom (between Miller Swale and holding pond) Soil Chehalis soil 08-04-99 -27.21 0.31 3 6.12 0.90 3 0 11.14 1.41 3 0
70 Jackson Bottom (between Miller Swale and holding pond) Leaf litter Oregon Ash leaves 08-04-99 -25.06 0.48 3 2.02 0.98 3 0 66.10 7.82 3 0
71 Tualatin Nature Park Coniferous litter Mixed Western Red Cedar litter 08-04-99 -24.91 0.29 3 -2.53 1.09 3 0 37.02 3.89 3 0
72 Tualatin Nature Park Coniferous litter Mixed Douglas Fir litter 08-04-99 -27.83 0.29 3 -2.62 1.12 3 0 31.90 2.20 3 0
73 Rock Creek Wastewater Treatment Facility WWTF effluent particulate – 07-14-99 -24.77 1.13 6 10.46 0.84 6 0 6.14 0.90 6 0
74 Durham Wastewater Treatment Facility WWTF effluent particulate – 07-14-99 -26.01 0.10 3 9.26 0.71 3 3 5.31 1.47 3 3
76 Tualatin River at RM 16.2 (Elsner Bridge) Suspended sediment Fraction remaining suspended after 24 hours 07-21-99 -33.86 0.09 3 6.60 0.38 3 0 5.57 1.42 3 0
77 Fanno Creek at Durham 
City Park Suspended sediment Fraction remaining suspended after 24 hours 07-21-99 -28.41 0.17 3 5.06 0.38 3 1 10.14 1.25 3 3
Late-Summer 1999
101 Henry Hagg Lake Seston, >80 μm – 09-10-99 -30.18 0.16 3 8.46 0.79 3 0 4.47 1.54 3 0
102 Henry Hagg Lake Seston, 80–202 μm – 09-10-99 -31.22 0.16 3 6.58 0.50 3 0 6.16 1.37 3 0
103 Tualatin River at RM 38.4 
(Rood Bridge) Suspended sediment – 09-10-99 -31.08 0.28 3 4.12 0.43 3 0 13.92 0.90 3 2
104 Tualatin River at RM 38.4 
(Rood Bridge) Bed sediment – 09-10-99 -27.88 0.46 8 3.95 0.10 8 0 16.13 1.03 8 1
105 Tualatin River at RM 9.9 
(Cook Park) Seston, >80 μm – 09-11-99 -33.19 0.62 3 8.05 0.59 3 0 8.24 1.23 3 0
106 Tualatin River at RM 9.9 
(Cook Park) Seston, 80–202 μm – 09-11-99 -33.00 0.36 3 7.59 0.60 3 0 8.85 1.23 3 0
107 Tualatin River at RM 9.9 
(Cook Park) Suspended sediment – 09-11-99 -34.06 0.14 4 7.35 0.41 4 0 8.71 1.04 4 0
108 Tualatin River at RM 9.9 
(Cook Park) Bed sediment – 09-11-99 -30.58 0.74 4 5.16 1.48 4 4 17.26 1.51 3 4
109 Tualatin River at RM 9.4 
(Basalt sill) Periphyton Cladophera 09-11-99 -35.50 0.13 3 4.28 0.59 3 0 10.03 1.13 3 0
110 Tualatin River at RM 20.3 Seston, >80 μm – 09-13-99 -29.53 0.39 4 4.17 0.30 4 0 12.63 1.62 4 0
111 Tualatin River at RM 20.3 Seston, 80–202 μm – 09-13-99 -30.86 0.41 3 5.88 0.93 3 0 11.91 2.31 3 0
112 Tualatin River at RM 20.3 Suspended sediment – 09-13-99 -30.80 1.35 3 6.73 0.77 3 0 14.84 2.21 3 0
113 Tualatin River at RM 20.3 Bed sediment – 09-13-99 -29.30 0.35 5 5.49 0.44 4 0 15.86 1.38 5 0
114 Tualatin River at RM 20.3 Bed sediment Anoxic blue-gray fraction 09-13-99 -28.72 0.27 4 5.37 0.77 4 4 14.75 1.17 4 4
115 Tualatin River at RM 16.2 (Elsner Bridge) Suspended sediment – 09-13-99 -32.27 0.98 3 7.08 2.60 2 0 11.86 1.22 3 0
116 Tualatin River at RM 16.2 (Elsner Bridge) Seston, >80 μm – 09-13-99 -31.07 0.51 3 5.96 0.37 3 1 10.05 1.17 3 0
117 Tualatin River at RM 16.2 (Elsner Bridge) Seston, 80–202 μm – 09-13-99 -31.41 0.53 4 6.69 0.40 4 4 10.75 1.24 4 0
118 Tualatin River at RM 16.2 (Elsner Bridge) Bed sediment – 09-13-99 -28.72 0.08 3 6.05 0.36 3 0 16.45 0.99 3 0
119 Tualatin River at RM 26.9 (Scholls) Seston, >80 μm – 09-15-99 -28.93 0.17 3 6.38 0.52 3 2 14.03 0.90 3 0
120 Tualatin River at RM 26.9 (Scholls) Seston, 80–202 μm – 09-15-99 -29.00 0.13 4 5.75 0.32 4 0 14.47 0.89 4 0
121 Tualatin River at RM 26.9 (Scholls) Suspended sediment – 09-15-99 -28.47 1.23 4 7.12 1.07 3 0 14.47 0.84 4 0
122 Tualatin River at RM 26.9 (Scholls) Bed sediment – 09-15-99 -29.55 0.14 7 5.66 0.21 5 1 17.45 1.50 7 4
123 Tualatin River at RM 5.5 (Stafford Road) Suspended sediment – 09-15-99 -33.68 0.30 3 12.79 1.29 3 0 9.54 1.18 3 0
124 Tualatin River at RM 5.5 (Stafford Road) Seston, >80 μm – 09-15-99 -37.66 0.08 4 16.71 1.39 4 0 5.69 1.23 4 0
125 Tualatin River at RM 5.5 (Stafford Road) Seston, 80–202 μm – 09-15-99 -38.23 0.50 3 17.36 2.39 2 0 5.31 1.46 3 0
126 Tualatin River at RM 5.5 (Stafford Road) Bed sediment – 09-15-99 -29.42 0.08 3 6.29 0.57 3 0 13.05 1.21 3 0
Winter 2000
201 Tualatin River at RM 38.4 
(Rood Bridge) Suspended sediment – 02-08-00 -30.71 0.85 3 4.89 1.38 3 0 12.12 2.46 3 3
202 Tualatin River at RM 5.5 (Stafford Road) Suspended sediment – 02-04-00 -32.01 0.46 5 4.05 1.06 5 5 16.19 1.51 5 5
203 Tualatin River at RM 26.9 (Scholls) Suspended sediment – 02-04-00 -31.01 0.35 5 4.29 0.51 3 3 17.83 1.76 5 3
204 Tualatin River at RM 26.9 (Scholls) Bed sediment Woody debris removed 02-04-00 -27.64 0.18 6 4.83 0.67 6 3 32.43 2.39 6 0
206 Tualatin River at RM 16.2 (Elsner Bridge) Suspended sediment – 02-04-00 -30.96 0.42 3 3.86 1.70 3 2 15.36 2.55 3 3
207 Tualatin River at RM 16.2 (Elsner Bridge) Bed sediment – 02-04-00 -28.55 0.31 4 4.07 0.42 4 4 27.11 2.24 4 4
208 Gales Creek at Old Highway 47 Suspended sediment – 02-07-00 -28.88 1.91 3 3.60 0.80 2 2 33.00 5.73 3 2
209 Dairy Creek at Highway 8 Suspended sediment – 02-07-00 -31.57 0.64 5 3.87 0.40 4 4 15.19 1.27 5 4
210 Tualatin River at RM 58.8 (Dilley) Suspended sediment – 02-07-00 -29.55 0.72 6 3.61 0.69 6 4 16.51 1.44 6 6
211 Rock Creek at Highway 8 Suspended sediment – 02-07-00 -32.51 0.79 4 4.59 0.44 4 4 17.58 2.33 4 4
212 Fanno Creek at Durham Road Suspended sediment – 02-07-00 -31.66 0.71 6 4.34 0.53 6 6 16.11 1.19 6 6
Early-Summer 2000
301 Henry Hagg Lake Seston, >80 μm – 06-03-00 -26.37 0.17 4 3.38 0.24 4 0 11.49 0.43 4 0
302 Henry Hagg Lake Seston, 80–202 μm – 06-03-00 -26.34 0.80 4 3.03 0.14 4 1 10.07 0.56 4 0
303 Tualatin River at RM 38.4 
(Rood Bridge) Suspended sediment – 06-05-00 -31.14 0.13 4 5.39 0.18 4 0 11.56 0.55 4 0
304 Tualatin River at RM 38.4 
(Rood Bridge) Bed sediment – 06-05-00 -28.12 0.12 3 4.06 0.49 3 0 15.81 1.23 3 0
305 Tualatin River at RM 9.9 
(Cook Park) Seston, >80 μm – 06-03-00 -32.55 0.20 3 9.02 0.49 3 0 8.87 0.22 3 0
306 Tualatin River at RM 9.9 
(Cook Park) Seston, 80–202 μm – 06-03-00 -32.56 0.15 4 8.68 0.48 4 0 8.95 0.22 4 0
307 Tualatin River at RM 9.9 
(Cook Park) Suspended sediment – 06-03-00 -35.07 0.17 3 9.50 0.08 3 0 7.82 0.35 3 0
308 Tualatin River at RM 9.9 
(Cook Park) Bed sediment – 06-03-00 -28.67 0.40 3 5.27 0.62 3 3 15.79 0.74 3 3
309 Tualatin River at RM 9.9 
(Cook Park) Duckweed Decomposed duckweed 06-03-00 -28.73 0.88 4 7.08 1.63 3 0 12.73 0.54 4 0
310 Tualatin River at RM 9.4 
(Basalt sill) Periphyton Cladophera 06-03-00 -36.21 0.04 4 6.81 0.27 4 0 9.66 0.32 4 0
311 Tualatin River at RM 8.7 
(Boones Ferry Bridge) Seston, >80 μm – 06-03-00 -32.61 0.18 3 9.99 0.13 3 0 9.56 0.20 3 0
312 Tualatin River at RM 8.7 
(Boones Ferry Bridge) Seston, 80–202 μm – 06-03-00 -32.64 0.06 3 9.15 0.64 3 0 10.17 0.27 3 0
313 Tualatin River at RM 8.7 
(Boones Ferry Bridge) Suspended sediment – 06-03-00 -35.22 0.97 3 11.46 1.08 3 3 7.70 0.10 3 0
314 Tualatin River at RM 8.7 
(Boones Ferry Bridge) Bed sediment – 06-03-00 -28.81 0.16 3 5.92 0.34 3 3 15.49 0.94 3 3
315 Tualatin River at RM 20.3 Seston, >80 μm – 06-05-00 -29.61 0.29 3 8.04 0.93 3 0 15.27 1.37 3 0
316 Tualatin River at RM 20.3 Seston, 80–202 μm – 06-05-00 -29.77 0.02 4 7.63 0.69 4 0 15.43 0.40 4 0
317 Tualatin River at RM 20.3 Suspended sediment – 06-05-00 -32.55 0.32 3 8.77 0.12 3 0 10.20 0.18 3 0
318 Tualatin River at RM 20.3 Bed sediment – 06-05-00 -28.29 0.20 3 5.47 0.29 3 0 15.09 0.49 3 0
319 Tualatin River at RM 16.2 (Elsner Bridge) Suspended sediment – 06-02-00 -30.24 0.48 3 10.63 1.35 3 0 12.93 0.56 3 0
320 Tualatin River at RM 16.2 (Elsner Bridge) Seston, >80 μm – 06-02-00 -29.21 0.34 3 10.25 0.25 3 0 12.99 1.08 3 0
321 Tualatin River at RM 16.2 (Elsner Bridge) Seston, 80–202 μm – 06-02-00 -31.62 0.18 3 10.37 0.77 3 2 10.99 0.15 3 0
322 Tualatin River at RM 16.2 (Elsner Bridge) Bed sediment – 06-02-00 -27.93 0.44 3 5.22 0.13 3 0 15.17 1.27 3 0
323 Tualatin River at RM 26.9 (Scholls) Seston, >80 μm – 06-02-00 -28.93 0.13 4 6.23 0.57 4 2 17.79 0.30 4 0
324 Tualatin River at RM 26.9 (Scholls) Seston, 80–202 μm – 06-02-00 -29.11 0.07 3 5.55 1.47 3 3 17.81 0.25 3 0
325 Tualatin River at RM 26.9 (Scholls) Suspended sediment – 06-02-00 -31.13 0.66 3 7.05 0.08 3 0 6.94 0.69 3 0
326 Tualatin River at RM 26.9 (Scholls) Bed sediment – 06-02-00 -27.80 0.55 4 5.26 0.27 4 0 9.48 1.32 4 0
327 Tualatin River at RM 5.5 (Stafford Road) Suspended sediment – 06-02-00 -33.51 0.44 3 12.10 0.29 3 0 10.63 0.44 3 0
328 Tualatin River at RM 5.5 (Stafford Road) Seston, >80 μm – 06-02-00 -37.81 0.23 3 13.58 0.22 3 0 7.51 0.02 3 0
329 Tualatin River at RM 5.5 (Stafford Road) Seston, 80–202 μm – 06-02-00 -37.99 0.20 3 13.74 0.10 3 0 7.14 0.13 3 0
330 Tualatin River at RM 5.5 (Stafford Road) Bed sediment – 06-02-00 -28.15 0.16 4 5.77 0.23 4 0 9.22 0.57 3 0
331 Gales Creek at Old Highway 47 Suspended sediment – 05-31-00 -29.72 0.10 3 3.02 0.44 3 0 9.68 1.20 3 0
332 Gales Creek at Old Highway 47 Bed sediment – 05-31-00 -27.61 0.23 3 1.72 0.29 3 0 12.64 3.63 3 0
333 Tualatin River at RM 58.8 (Dilley) Suspended sediment – 05-31-00 -30.62 0.59 4 4.64 0.20 4 0 10.50 0.39 4 0
334 Tualatin River at RM 58.8 (Dilley) Bed sediment – 05-31-00 -27.77 0.17 3 2.48 0.21 3 0 13.10 3.56 3 0
335 Dairy Creek at Highway 8 Suspended sediment – 05-31-00 -31.34 0.14 3 3.71 0.02 3 0 8.94 3.36 3 0
336 Dairy Creek at Highway 8 Bed sediment – 05-31-00 -27.77 0.11 4 3.69 0.26 4 0 18.09 2.05 4 0
337 Dairy Creek at Highway 8 Grass Grass growing in stream 05-31-00 -31.09 0.13 3 4.64 0.15 3 0 16.92 1.35 3 0
338 Rock Creek at Highway 8 Suspended sediment – 05-31-00 -32.01 0.15 3 5.61 0.14 3 0 7.71 1.27 3 0
339 Rock Creek at Highway 8 Bed sediment – 05-31-00 -28.79 0.29 3 5.56 0.03 3 0 17.31 1.47 3 0
340 Rock Creek at Highway 8 Periphyton Species not identified 05-31-00 -42.84 0.22 4 3.54 0.03 4 0 8.08 0.08 4 0
341 Rock Creek at Highway 8 Decomposed terrestrial detritus Decomposed non-woody plant material in stream 05-31-00 -28.92 1.24 3 5.00 0.07 3 0 23.13 2.41 3 0
342 Fanno Creek at Durham 
City Park Suspended sediment – 05-31-00 -31.82 0.18 3 4.43 0.46 3 0 8.86 0.68 3 0
343 Fanno Creek at Durham 
City Park Bed sediment – 05-31-00 -28.58 0.49 4 4.13 0.19 4 0 13.00 1.40 4 0
344 Rock Creek Wastewater Treatment Facility WWTF effluent particulate – 06-01-00 -27.41 0.77 3 10.14 0.21 3 2 8.04 2.83 3 2
345 Durham Wastewater Treatment Facility WWTF effluent particulate – 06-01-00 -27.94 1.18 3 7.15 0.60 3 0 7.44 0.89 3 2

First posted August 17, 2010

  • Podcast

For additional information contact:
Director, Oregon Water Science Center
U.S. Geological Survey
2130 SW 5th Ave.
Portland, Oregon 97201
http://or.water.usgs.gov

Part or all of this report is presented in Portable Document Format (PDF); the latest version of Adobe Reader or similar software is required to view it. Download the latest version of Adobe Reader, free of charge.

Accessibility FOIA Privacy Policies and Notices

Take Pride in America logo USA.gov logo U.S. Department of the Interior | U.S. Geological Survey
URL: http://pubsdata.usgs.gov/pubs/sir/2010/5154/table6.html
Page Contact Information: GS Pubs Web Contact
Page Last Modified: Thursday, 10-Jan-2013 19:15:30 EST