USGS Scientific Investigations Report 2010–5153 - Thermal Effects of Dams in the Willamette River Basin, Oregon

Table 3. Minimum and maximum streamflows for conditions with and without upstream dams at 12 dam sites in the Willamette River basin, Oregon, 2001–02.

[Streamflow statistics are rounded to three significant digits. Measured flows at the Foster dam site were obtained by subtracting the flows from Wiley Creek (14187000) from the downstream South Santiam flows (14187200). Measured flows at the Green Peter Dam site were obtained from the U.S. Army Corps of Engineers. GPR, flow gage at Green Peter Dam]

Dam site	Streamflow, in cubic feet per second								Station ID for the measured with-dam data
	Maximum		95th percentile		5th percentile		Minimum
	Without dams	With dams	Without dams	With dams	Without dams	With dams	Without dams	With dams
Big Cliff / Detroit	16,400	10,100	4,100	4,690	700	851	641	807	14181500
Blue River	4,500	2,990	1,330	1,170	26.5	49.1	21.2	45.6	14162200
Cottage Grove	1,790	1,570	509	635	23.9	43.0	22.5	40.0	14153500
Cougar	6,590	4,590	1,580	1,990	243	217	231	186	14159500
Dexter / Lookout Point	21,700	9,970	6,000	5,100	709	1,090	633	1,020	14150000
Dorena	7,170	4,160	2,000	1,780	28.2	95.6	24.0	87.8	14155500
Fall Creek	4,910	3,070	1,390	1,420	22.9	38.0	20.9	34.0	14151000
Fern Ridge	9,680	3,030	2,090	2,090	53.8	37.9	36.6	25.8	14169000
Foster	23,700	12,300	7,170	7,400	133	647	99.6	588	14187200 - 14187000
Green Peter	13,500	9,840	4,660	4,580	80.2	50.0	58.0	50.0	GPR
Hills Creek	7,780	3,090	2,190	2,070	304	282	276	83.1	14145500
River Mill	20,700	17,400	5,040	5,250	724	680	639	589	14210000