Chief Joseph Dam & Rufus Woods Lake

May 2026

Day of Month	Total Generation MWh	Average Generation MW	Station Use MWh	Inflow kcfs	Total Outflow kcfs	Generation Flow kcfs	Spill kcfs	Midnight Reservoir Elevation	Average Forebay Elevation	Average Tailwater Elevation	Average Head feet
1	35146	1464	23	162.80	160.50	114.60	45.90	955.20	954.10	785.80	168.30
2	43789	1825	23	135.80	145.90	142.20	3.70	952.60	953.20	785.10	168.10
3	40813	1701	22	128.90	131.20	131.20	0.00	952.00	952.50	783.40	169.10
4	42563	1773	24	144.40	135.90	135.90	0.00	954.20	952.70	783.70	169.00
5	45309	1888	24	140.10	149.00	149.00	0.00	951.90	951.70	785.00	166.70
6	28814	1201	23	97.20	90.60	90.60	0.00	953.60	952.80	781.30	171.50
7	31121	1297	25	98.30	97.10	97.10	0.00	953.90	952.70	780.30	172.40
8	35914	1496	24	107.60	113.00	113.00	0.00	952.50	953.10	782.50	170.60
9	38634	1610	24	123.00	122.60	122.60	0.00	952.60	952.50	782.60	169.90
10	37709	1571	24	119.70	118.20	118.20	0.00	953.00	952.50	782.40	170.10
11	38685	1612	24	123.60	122.00	122.00	0.00	953.40	952.60	782.70	169.90
12	43735	1822	23	141.60	139.60	139.60	0.00	953.90	953.00	784.50	168.50
13	37480	1562	24	113.70	119.10	119.10	0.00	952.50	952.60	784.00	168.60
14	39643	1652	24	124.10	126.40	126.40	0.00	951.90	952.30	784.40	167.90
15	36497	1521	24	123.00	115.30	115.30	0.00	953.90	952.80	783.10	169.70
16	38673	1611	24	117.10	122.50	122.50	0.00	952.50	953.90	783.50	170.40
17	34393	1433	24	109.60	109.20	109.20	0.00	952.80	952.60	782.80	169.80
18	40714	1696	23	136.20	129.60	129.60	0.00	954.30	953.20	783.40	169.80
19	46622	1943	22	146.30	153.30	153.30	0.00	952.70	953.90	785.30	168.60
20	41951	1748	23	133.70	134.10	134.10	0.00	952.60	952.50	784.60	167.90
21	38677	1612	23	127.10	122.40	122.40	0.00	953.80	952.40	782.80	169.60
22	41383	1724	23	128.20	131.70	131.70	0.00	952.90	952.80	783.40	169.40
23	35119	1463	23	108.20	111.70	111.70	0.00	952.00	952.60	783.30	169.30
24	30810	1284	24	101.90	98.00	98.00	0.00	953.00	952.40	781.40	171.00
25	36788	1533	22	112.60	116.10	116.10	0.00	952.10	952.50	782.70	169.80
26	37494	1562	23	120.70	118.80	118.80	0.00	952.60	952.30	782.60	169.70
27	36018	1501	24	116.30	113.20	113.20	0.00	953.40	953.00	781.80	171.20
28	44953	1873	24	148.30	143.60	143.60	0.00	954.50	954.00	784.50	169.50
29				108.50	121.30	121.30	0.00	951.30	952.50	783.40	169.10
30				107.20	105.30	105.30	0.00	951.80	952.60	782.70	169.90
31				126.20	124.70	124.70	0.00	952.20	951.80	783.70	168.10

TOT	1079447		657
AVG	38552	1606	23	123.61	123.93	122.33	1.60	952.95	952.78	783.31	169.46

MAX	46622			162.80	160.50	153.30	45.90	955.20	954.10	785.80	172.40
MIN	28814			97.20	90.60	90.60	0.00	951.30	951.70	780.30	166.70