McNary Dam & Lake Wallula

June 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	6651	277	120	224.50	216.20	53.00	158.50	338.05	337.71	266.25	71.46
2	6688	279	120	229.50	236.10	53.20	178.20	337.70	337.75	266.31	71.44
3	6708	280	120	245.80	241.30	53.20	183.40	337.94	337.74	266.43	71.31
4	6876	287	120	247.50	215.90	53.80	157.40	339.66	338.81	266.14	72.67
5	7084	295	120	230.00	236.40	55.60	176.10	339.29	339.68	266.74	72.94
6	7057	294	120	195.20	214.20	55.60	153.90	338.28	338.77	266.05	72.72
7				221.60	221.20	54.80	161.60	338.31	338.49	266.03	72.46
8				229.00	224.20	52.50	167.00	338.60	338.42	266.06	72.36
9				212.20	208.90	51.70	152.50	338.73	338.60	266.10	72.50
10				200.50	198.40	51.20	142.50	338.83	339.08	265.80	73.28
11				193.60	195.40	51.20	139.40	338.75	338.79	265.68	73.11
12				180.90	186.20	51.10	130.40	338.49	338.55	265.38	73.17
13				176.20	179.50	51.00	123.80	338.29	338.58	265.19	73.39
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TOT	41065		720
AVG	6844	285	120	214.35	213.38	52.92	155.75	338.53	338.54	266.01	72.52

MAX	7084			247.50	241.30	55.60	183.40	339.66	339.68	266.74	73.39
MIN	6651			176.20	179.50	51.00	123.80	337.70	337.71	265.19	71.31