Table B-5.   Historic levels (in ft, relative) in Barrett reservoir at the beginning of the month.1

Year	JUL	AUG	SEP	OCT	NOV	DEC	JAN	FEB	MAR	APR	MAY	JUN	Mean
1921-22	47.90	47.95	48.04	48.35	49.10	49.90	101.82	108.56	132.30	149.25	159.40	162.63	92.10
1922-23	161.68	160.43	159.56	158.97	163.65	165.95	168.41	167.35	167.04	167.76	168.35	168.47	164.80
1923-24	168.25	167.81	167.27	166.81	163.63	161.43	158.56	155.47	153.19	153.38	154.50	154.19	160.37
1924-25	153.60	152.92	152.27	151.69	149.02	146.15	143.48	140.10	137.12	134.68	134.00	133.86	144.07
1925-26	133.54	132.86	132.20	131.64	129.37	124.86	120.88	116.18	117.25	117.38	128.84	129.24	126.19
1926-27	128.77	127.95	127.28	126.67	125.43	121.75	121.68	119.68	164.30	171.25	172.09	171.78	139.89
1927-28	170.89	169.91	168.22	167.72	165.73	163.58	163.37	164.26	166.00	167.14	167.25	167.07	166.76
1928-29	166.56	165.96	165.37	164.87	164.62	164.61	164.63	161.93	159.86	157.80	157.62	156.56	162.53
1929-30	155.71	153.79	151.71	149.93	149.90	146.18	143.16	144.73	145.08	146.75	146.95	149.24	148.59
1930-31	147.33	146.35	144.34	139.98	135.70	131.97	130.98	131.45	133.00	133.05	133.21	132.96	136.69
1931-32	132.46	131.93	132.71	132.97	130.14	125.98	125.58	127.18	150.30	155.02	156.57	157.06	138.16
1932-33	156.96	156.38	155.73	155.19	154.90	154.67	155.30	157.05	158.17	158.69	159.04	156.90	156.58
1933-34	153.77	149.86	145.81	141.56	137.20	132.66	128.28	123.10	123.49	123.49	120.26	113.76	132.77
1934-35	107.21	98.29	92.80	92.80	90.95	79.75	80.69	82.61	90.00	95.19	114.32	106.15	94.23
1935-36	95.78	82.47	67.15	59.40	61.70	62.50	63.37	64.21	76.76	80.38	79.46	78.43	72.63
1936-37	80.31	82.40	70.75	112.74	111.60	110.52	111.66	113.17	116.58	120.23	121.60	120.07	105.97
1937-38	116.78	114.51	112.04	165.90	164.53	162.10	159.81	160.02	162.56	168.93	169.81	170.10	152.26
1938-39	168.50	167.94	167.73	167.51	165.65	163.49	163.77	163.86	167.70	168.93	168.62	167.35	166.75
1939-40	165.86	164.20	162.55	163.31	163.36	163.39	163.70	164.65	166.58	167.55	167.70	166.76	164.97
1940-41	165.25	163.70	161.29	159.86	159.83	161.00	164.62	163.37	164.45	169.40	169.30	168.88	164.25
1941-42	168.29	166.15	164.28	163.53	163.46	161.98	168.00	168.47	168.96	168.90	168.57	166.48	166.42
1942-43	163.68	160.78	112.04	155.82	155.83	155.19	155.21	158.21	158.23	161.00	168.65	168.77	156.12
1943-44	165.68	162.49	159.38	156.41	153.63	151.04	149.40	150.30	158.52	166.70	168.10	167.02	159.06
1944-45	164.92	162.10	159.77	158.33	158.44	160.08	158.85	159.96	161.42	166.04	165.71	163.36	161.58
1945-46	161.80	158.62	155.58	152.07	151.19	146.97	154.02	152.36	150.77	151.00	153.06	152.83	153.36
1946-47	150.51	146.77	142.44	138.51	134.26	131.56	127.97	123.18	118.88	114.38	107.52	98.90	127.91
1947-48	115.32	109.62	104.95	116.37	110.66	104.58	103.22	104.08	113.17	107.03	116.74	110.55	109.69
1948-49	104.06	104.60	102.51	101.25	91.85	76.67	63.98	70.72	76.69	82.21	78.30	62.57	84.62
1949-50	60.07	60.02	59.91	59.72	60.05	60.68	61.63	63.40	60.41	61.11	61.16	61.83	60.83
1950-51	61.74	61.49	61.09	60.95	60.89	61.22	61.59	62.78	63.52	59.91	58.09	43.77	59.75
1951-52	41.97	42.27	42.31	42.19	42.52	43.25	58.61	84.68	72.70	116.40	119.46	114.51	68.41
1952-53	105.62	103.12	89.80	81.08	81.12	81.82	83.65	85.85	86.89	89.20	90.04	90.39	89.05
1953-54	90.09	89.54	89.01	88.57	88.30	88.31	88.29	89.97	102.61	111.72	103.46	89.64	93.29
1954-55	67.37	62.18	62.27	62.26	62.48	62.95	63.49	65.00	66.20	67.30	67.60	68.10	64.77
1955-56	67.70	67.60	67.20	66.90	66.70	66.90	67.30	67.80	73.80	60.70	62.70	62.90	66.52
1956-57	62.60	62.10	61.70	61.30	61.20	61.10	61.30	60.90	59.20	60.40	60.80	61.70	61.19
1957-58	61.40	60.80	60.30	60.00	60.10	60.20	60.40	60.60	62.80	79.70	105.60	96.00	68.99
1958-59	81.60	62.40	62.50	62.40	62.30	62.60	63.00	63.50	66.40	66.90	67.00	66.80	65.62
1959-60	66.40	65.90	65.40	65.10	64.80	64.70	65.00	65.50	67.30	68.10	68.30	68.30	66.23
1960-61	67.80	67.20	66.60	66.10	65.90	66.00	66.00	66.10	66.10	66.20	65.90	65.50	66.28
1961-62	64.90	64.30	63.70	63.30	63.00	62.90	63.10	63.50	64.90	71.50	72.10	71.90	65.76
1962-63	71.40	70.70	70.10	69.60	69.20	69.00	69.00	68.90	69.20	69.20	69.10	68.70	69.51
1963-64	68.20	67.40	66.80	66.60	66.50	66.50	66.40	66.60	66.60	66.80	66.70	66.40	66.79
1964-65	65.90	65.20	64.60	64.00	63.70	63.70	63.90	63.90	64.00	64.00	70.50	70.10	65.29
1965-66	69.70	69.10	68.50	68.10	67.70	75.70	79.56	83.01	88.21	90.56	90.87	87.18	78.18
1966-67	68.30	60.86	60.52	60.22	60.07	60.16	85.89	81.17	72.02	61.20	70.03	72.31	67.73
1967-68	72.45	71.89	71.30	70.90	70.47	70.67	64.75	60.95	61.68	60.34	61.07	60.90	66.45
1968-69	60.44	59.96	59.38	58.90	58.67	58.66	58.86	78.77	107.72	125.11	124.16	120.55	80.93
1969-70	115.35	110.79	104.29	104.04	103.84	103.91	104.00	104.24	104.56	105.74	98.55	88.40	103.98
1970-71	76.68	60.74	60.78	60.47	60.46	60.96	66.06	68.10	69.55	70.59	71.18	71.50	66.42
1971-72	71.12	70.59	70.15	69.71	69.51	69.47	70.35	70.72	71.04	70.93	70.72	67.18	70.12
1972-73	61.07	60.58	60.04	59.70	59.86	62.50	65.62	67.08	72.33	89.90	89.30	83.56	69.30
1973-74	73.80	61.17	60.10	59.82	59.68	59.90	60.05	65.30	65.86	62.66	60.60	60.42	62.45
1974-75	59.95	59.52	58.98	58.56	58.64	58.60	58.99	59.12	59.70	62.14	60.66	60.44	59.61
1975-76	60.11	59.60	59.04	58.59	58.34	58.45	58.56	58.88	65.80	63.75	60.30	59.91	60.11
1976-77	59.46	59.10	58.58	61.18	60.92	60.88	60.88	62.01	62.21	62.96	62.90	63.04	61.18
1977-78	62.52	61.86	61.54	61.07	60.80	60.63	60.87	73.80	97.07	149.06	154.59	156.00	88.32
1978-79	154.08	151.50	148.28	146.30	143.75	142.10	141.26	144.08	151.64	163.88	163.88	164.70	151.29
1979-80	163.56	161.80	159.86	157.78	156.86	156.96	157.22	161.62	161.90	161.54	164.22	168.74	161.01
1980-81	168.12	166.96	164.82	163.12	161.46	159.76	158.60	157.48	157.48	161.02	161.92	161.22	161.83
1981-82	159.38	157.22	155.20	153.12	151.16	149.44	149.62	151.90	154.70	159.86	161.60	160.96	155.35
1982-83	159.58	159.26	157.64	155.92	154.56	155.52	161.06	161.34	161.86	161.86	161.58	161.26	159.29
1983-84	161.10	160.86	160.93	160.52	160.93	161.02	161.10	161.00	160.94	160.32	159.10	157.47	160.44
1984-85	156.72	155.76	154.80	152.68	151.74	151.12	153.34	154.59	154.92	154.58	153.62	151.88	153.81
1985-86	149.84	148.04	146.18	144.14	142.50	142.52	142.10	140.76	142.62	147.48	147.88	146.11	145.01
1986-87	144.04	141.94	139.90	138.30	136.96	135.48	134.10	132.94	132.84	133.06	131.98	130.02	135.96
1987-88	128.71	127.44	125.30	122.73	120.68	118.89	117.20	117.75	116.72	114.61	114.32	112.85	119.77
1988-89	108.21	103.87	103.80	100.18	93.83	93.07	99.52	104.45	104.68	111.01	116.55	122.71	105.16
1989-90	125.11	121.32	116.70	112.17	109.58	105.22	100.58	101.14	101.50	115.87	113.84	110.26	111.11
1990-91	106.54	103.90	101.02	96.22	92.72	92.72	92.94	93.21	99.98	123.88	127.66	127.96	104.90
1991-92	127.68	127.23	126.77	126.41	126.12	125.93	126.13	126.74	129.07	131.44	132.50	132.26	128.19
1992-93	131.76	131.19	130.70	130.20	129.92	129.64	129.98	161.28	161.55	161.26	163.51	166.17	143.93
1993-94	167.04	166.34	165.80	162.60	158.82	159.58	160.46	161.00	161.02	161.03	161.06	161.00	162.15
1994-95	160.92	160.92	160.90	160.93	160.95	160.94	160.96	161.04	160.98	161.23	165.82	167.40	161.92
1995-96	164.80	161.56	158.46	157.60	158.02	155.86	153.80	151.91	153.31	154.68	152.62	150.77	156.12
1996-97	150.88	151.00	151.05	151.18	151.45	151.96	152.52	153.48	151.96	148.56	144.90	141.24	150.02
1997-98	136.72	132.25	127.46	123.16	116.66	110.64	111.56	110.88	134.46	146.20	162.29	165.94	131.52
1998-99	166.42	164.44	161.76	161.08	158.85	156.78	156.14	155.28	153.92	152.17	151.33	149.40	157.30
1999-00	147.14	144.84	141.92	138.74	135.66	132.86	129.52	128.55	133.30	135.19	135.58	135.00	136.53
Media	117.66	115.36	112.87	113.57	112.40	111.29	111.79	113.23	116.38	119.86	121.60	120.07	115.42

1  The first 10 months were not included in the calculation of the mean due to the initial filling of the reservoir. The mean mean monthly level (115.42 ft) and the maximum mean monthly level (121.6 ft) (May) are shown in bold in the last line of the table.