USGS Scientific Investigations Report 2012–5231  - Simulating Potential Structural and Operational Changes for Detroit Dam on the North Santiam River, Oregon, for Downstream Temperature Management  

Table 5. Operational scenario group descriptions, Detroit Dam, North Santiam River, Oregon. 

[ft³/s, cubic foot per second; NA, not applicable] 

Operational scenario groups	Minimum outflow rules			Important dates
Operational scenario groups	Rules governing total outflow	Minimum outflow to power  (percent)	Outflow rule for floating outlet	Refill begins	Drawdown begins
“base”	Existing operational rules following BIOP minimum flow requirements	40	NA	Feb. 1	Sept. 1
“10ppmin”		10	No minimum	Feb. 1	Sept. 1
“20ppmin”		20	No minimum	Feb. 1	Sept. 1
“noppmin”		No minimum	No minimum	Feb. 1	Sept. 1
“nomins”		No minimum	No minimum	Feb. 1	Sept. 1
“400fmin”		No minimum	400 ft³/s minimum	Feb. 1	Sept. 1
“400f”		40	400 ft³/s fixed	Feb. 1	Sept. 1
“fixed_elevation”	Decreased minimum flow requirements June 1–Dec. 31; constant pool elevation of 1,440 feet year-round	40	NA	NA	NA
“late_refill”	Decreased minimum flow requirements during the summer	40	NA	June 1	Sept. 1
“early_dd”	Decreased minimum flow requirements June 1–Sept. 1	40	NA	Feb. 1	Aug. 15
“delay_dd1”	Decreased minimum flow requirements May 1–Oct. 15	40	NA	Feb. 1	Sept. 1
“delay_dd1_noppmin”	Decreased minimum flow requirements May 1–Oct. 15	No minimum	NA	Feb. 1	Sept. 1
“delay_dd2”	Decreased minimum flow requirements Sept. 1–Oct. 15	40	NA	Feb. 1	Oct. 15
“delay_dd2_noppmin”	Decreased minimum flow requirements Sept. 1–Oct. 15	No minimum	NA	Feb. 1	Oct. 15