Bonneville Dam & Lake on Columbia River

May 2022

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	Project Average Tailwater	2nd Powerhouse Total MWh	2nd Powerhouse Flow kcfs
1	3278	137	96	169.20	172.20	31.40	128.40	74.40	74.60	15.10	59.50	15.20	3210	30.50
2	3285	137	96	157.70	161.70	31.40	117.80	74.10	74.10	14.60	59.50	14.70	3218	30.50
3	3321	138	96	171.70	160.70	31.50	116.80	75.30	74.50	14.40	60.10	14.40	3254	30.60
4	3317	138	96	169.30	170.30	31.50	126.40	75.10	75.00	14.90	60.10	15.00	3250	30.60
5	3614	151	96	179.00	182.00	34.80	134.90	74.80	74.80	15.60	59.20	15.70	3547	33.90
6	5391	225	96	217.10	214.10	53.40	148.20	75.20	75.00	17.70	57.30	17.70	5324	52.50
7	7063	294	96	225.60	232.60	72.00	148.30	74.40	75.00	19.10	55.90	19.10	7012	71.30
8	8726	364	96	248.30	253.30	92.90	148.00	74.00	74.10	20.60	53.50	20.50	8456	89.90
9	8173	341	96	247.70	247.70	87.30	148.00	73.90	73.80	20.40	53.40	20.40	7889	84.10
10	6763	282	96	232.00	232.00	71.60	148.10	73.90	73.40	19.50	53.90	19.50	6675	70.40
11	8730	364	96	255.80	253.80	93.20	148.20	74.10	73.80	20.30	53.50	20.20	7438	79.30
12	8593	358	96	250.60	251.60	90.90	148.40	74.00	74.20	20.30	53.90	20.30	7697	81.30
13	8545	356	96	249.70	251.70	91.00	148.30	74.10	73.70	20.20	53.50	20.20	7722	82.20
14	9311	388	96	272.20	259.20	98.30	148.50	75.10	74.50	20.70	53.80	20.60	8144	86.20
15	9182	383	96	259.30	257.30	96.10	148.80	75.30	75.10	20.90	54.20	20.80	8000	83.80
16	8362	348	96	245.90	247.90	86.50	148.90	75.10	75.10	20.60	54.50	20.50	7111	73.80
17	9562	398	96	257.20	262.20	100.90	148.90	74.50	74.40	21.20	53.20	21.00	6907	73.40
18	10662	444	96	268.60	276.60	115.10	149.10	73.80	73.90	22.00	51.90	21.70	6406	69.90
19	10332	430	96	266.60	275.60	114.20	149.00	72.90	73.00	21.90	51.10	21.60	7314	81.40
20	11978	499	96	307.20	297.20	135.70	149.00	73.80	72.60	22.70	49.90	22.30	7444	85.10
21				295.70	290.70	128.90	149.40	74.20	74.30	22.30	52.00	22.00		83.60
22				274.30	284.30	122.20	149.80	73.20	73.70	22.00	51.70	21.70		82.60
23				274.60	260.60	98.50	149.70	74.80	74.40	20.80	53.60	20.60		74.80
24				257.60	256.60	94.10	150.10	74.90	74.90	20.20	54.70	20.20		70.50
25				274.00	280.00	117.80	149.90	74.30	73.90	21.40	52.50	21.20		73.30
26				280.30	285.30	123.40	149.50	73.70	73.90	21.80	52.10	21.60		81.70
27				296.10	298.10	136.50	149.20	73.50	73.10	22.60	50.50	22.20		82.80
28
29
30
31

TOT	148188		1920
AVG	7409	309	96	244.57	245.01	88.19	144.43	74.31	74.18	19.77	54.41	19.66	6301	69.26

MAX	11978			307.20	298.10	136.50	150.10	75.30	75.10	22.70	60.10	22.30	8456	89.90
MIN	3278			157.70	160.70	31.40	116.80	72.90	72.60	14.40	49.90	14.40	3210	30.50