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

Table 2. Evaporation rates from selected reservoirs owned and operated by the U.S. Army Corps of Engineers in the Willamette River basin, Oregon.

[USACE, U.S. Army Corps of Engineers; maximum evaporation rates from July measurements by USACE; minimum evaporation rates were assumed]

Reservoir	Evaporation rate (inches per month)		Full-pool area (acres)	Evaporative loss (cubic feet per second)
Reservoir	Maximum	Minimum	Full-pool area (acres)	Maximum	Minimum
Blue River	4.36	1.00	1,009	6.0	1.4
Cottage Grove	4.49	1.00	1,156	7.0	1.6
Cougar	5.53	1.00	1,280	9.6	1.7
Detroit	4.59	1.00	3,500	21.8	4.7
Dorena	4.75	1.00	1,749	11.3	2.4
Fall Creek	4.94	1.00	1,820	12.2	2.5
Fern Ridge	5.10	1.00	9,000	62.2	12.2
Foster	4.65	1.00	1,220	7.7	1.7
Green Peter	4.82	1.00	3,720	24.3	5.0
Hills Creek	6.22	1.00	2,735	23.1	3.7
Lookout Point	4.55	1.00	4,360	26.9	5.9