McNary Dam & Lake Wallula

July 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	9627	401	120	183.30	183.60	75.10	103.80	339.01	338.75	265.76	72.99
2	10306	429	120	188.20	190.10	80.10	105.20	338.92	339.05	265.73	73.32
3	7873	328	120	179.20	172.50	60.40	107.40	339.26	339.32	265.23	74.09
4	7931	330	120	162.50	163.90	61.00	98.20	339.20	339.17	265.05	74.12
5	9090	379	120	171.40	167.80	69.80	93.30	339.35	339.42	265.27	74.15
6	9654	402	120	170.40	174.90	74.50	95.70	339.13	339.32	265.52	73.80
7	7362	307	120	167.40	161.90	56.20	101.00	339.41	339.39	265.22	74.17
8	6685	279	120	136.90	133.70	50.60	78.40	339.49	339.32	264.71	74.61
9	7752	323	120	127.00	139.10	59.00	75.50	338.84	339.29	264.70	74.59
10	7784	324	120	141.50	143.40	59.80	78.90	338.75	338.73	264.68	74.05
11	6978	291	120	120.40	138.30	53.70	79.90	337.74	338.31	264.60	73.71
12	6764	282	120	133.70	121.80	52.10	65.00	338.41	338.12	264.18	73.94
13	7624	318	120	146.00	132.20	58.30	69.20	339.16	338.80	264.36	74.44
14	7451	310	120	127.80	136.30	56.80	74.80	338.72	339.06	264.48	74.58
15	6784	283	120	141.00	134.90	52.00	78.20	339.03	338.79	264.42	74.37
16	8344	348	120	145.50	146.00	64.20	77.10	339.01	339.04	264.83	74.21
17	6695	279	120	118.70	117.20	51.20	61.30	339.09	339.08	264.36	74.72
18	6728	280	120	104.10	108.90	51.40	52.90	338.84	338.94	264.23	74.71
19	6969	290	120	118.20	119.70	53.20	61.80	338.76	338.74	264.39	74.35
20	7100	296	120	135.50	127.40	53.80	68.80	339.23	339.04	264.50	74.54
21	7035	293	120	125.40	130.90	53.10	73.10	338.92	339.15	264.46	74.69
22	6735	281	120	129.90	122.50	50.80	67.00	339.27	339.10	264.32	74.78
23	8358	348	120	137.00	138.30	63.30	70.30	339.24	339.21	264.59	74.62
24	8021	334	120	140.90	143.70	60.90	78.10	339.07	339.24	264.84	74.40
25	7199	300	120	126.60	124.90	54.50	65.70	339.14	339.10	264.60	74.50
26	6855	286	120	110.00	109.90	51.30	53.80	339.14	339.19	263.90	75.29
27	7761	323	120	121.60	126.20	58.50	63.00	338.92	339.08	264.18	74.90
28	6623	276	120	124.50	127.20	50.10	72.40	338.76	339.02	264.35	74.67
29	6834	285	120	127.80	128.30	51.80	71.80	338.75	338.58	264.18	74.40
30	6706	279	120	117.30	119.90	51.10	64.10	338.63	338.83	264.25	74.58
31				120.10	120.20	51.80	63.70	338.61	338.53	264.23	74.30

TOT	227629		3600
AVG	7588	316	120	138.70	138.89	57.75	76.43	338.96	338.99	264.65	74.34

MAX	10306			188.20	190.10	80.10	107.40	339.49	339.42	265.76	75.29
MIN	6623			104.10	108.90	50.10	52.90	337.74	338.12	263.90	72.99