Salt Lake City Public Utilities
					Hydrology Department
			Catch this report on the WEB at :   www.slcgov.com/utilities/snow_survey.htm
					Snow Survey for May 1st
					by Dan Schenck & Larry Alserda
					Little Cottonwood Watershed
Alta Central snow course     elevation 8800'     19 years of record							Snowbird snotel     elevation 9160     26 years of record
water content		snow depth	density	percent	date of		water content		snow depth	density	percent	date of
year	(inches)	(inches)	(percent)	of normal	sampling		year	(inches)	(inches)	(percent)	of normal	sampling
2002	33.2	66	50	98.5%	2-May		2002	41.9	96	44	111%	2-May
2001	22	51	22	65.3%			2001	32.2	83	39	86%
2000	24.4	54	45	72.4%			2000	28.6	66	43	76%
1999	33.5	81	42	99.4%			1999	36.9	103	36	98%
1998	41.7	93	45	123.7%			1998	41.9	101	41	111%
1997	46.7	109	43	138.6%			1997	48.6	124	39	129%
1996	46.2	102	45	137.1%			1996	57.1	124	46	152%
1995	48.4	108	45	143.6%			1995	60.6	150	41	161%
1994	23.7	61	39	70.3%			1994	28.8	80	36	77%
1993	48.4	106	46	143.6%			1993	56.2	133	42	149%
1992	10.8	22	48	32.0%			1992	15.8	30	55	42%
1991	23.6	52	45	70.0%			1990	35.0	79	44	93%
1990	28.5	68	42	84.6%			1989	32.2	77	42	86%
1989	19.5	43.0	46.0	57.9%			1984	44	114	39	117%
1984	54.1	133.0	41.0	160.5%			1977	9.6	23	42	26%
average	33.7						average	37.6
	Little Cottonwood % of normal			105%
					Parleys watershed
Parleys Summit snow course     elevation 7700'     69 years of record							Lambs snow course     elevation 7600'      31 years of record
water content		snow depth	density	percent	date of		water content		snow depth	density	percent	date of
year	(inches)	(inches)	(percent)	of normal	sampling		year	(inches)	(inches)	(percent)	of normal	sampling
2002	9.7	23	43	78%	1-May		2002	1.2	3	40	14%	1-May
2001	6.8	16	43	55%			2001	1.9	4	47	23%
2000	1.2	3	39	10%			2000	0	0	0	0%
1999	15.4	39	40	124%			1999	10.5	25	43	127%
1998	16.2	35	47	131%			1998	12.2	27	45	147%
1997	17.2	40	43	139%			1997	10.7	26	41	129%
1996	19.6	46	42	158%			1996	11.5	26	44	139%
1995	17.6	45	39	142%			1995	10.9	28	40	131%
1994	8.9	24	37	72%			1994	3.3	9	36	40%
1993	16.1	38	42	130%			1993	8.3	17	48	100%
1992	0.1	0	25	1%			1992	0	0	0	0%
1991	16.4	64	26	132%			1991	10.6	46	23	128%
1990	0.7	3	22	6%			1990	0.3	2	17	4%
1984	26.6	65	41	215%			1989	2.5	7	35	30%
1983	23.2	62	37	187%			1984	21.9	55	40	264%
1977	0.0	0	0	0%			1983	20.4	48	36	246%
1952	23.1	43	54	186%			1977	0.0	0	0	0%
average	12.4						average	8.3
		Parleys % of normal		46.3%
Millcreek snow course     elevation 7000'      29 years of record							Killyon snow course     elevation 6300'    16 years of record
water content		snow depth	density	percent	date of		water content		snow depth	density	percent	date of
year	(inches)	(inches)	(percent)	of normal	sampling		year	(inches)	(inches)	(percent)	of normal	sampling
2002	19.9	46	44	109%	1-May		2002	0	0	0	0%	29-Apr
2001	12.8	31	41	70%			2001	0	0	0	0%
2000	8.9	21	42	49%			2000	0	0	0	0%
1999	20.7	53	39	114%			1999	0	0	0	0%
1998	24.2	57	43	133%			1998	0	0	0	0%
1997	24.5	61	40	135%			1997	0	0	0	0%
1996	23.8	54	44	131%			1996	0	0	0	0%
1995	22	55	40	121%			1995	0	0	0	0%
1994	17.9	44	41	98%			1994	0	0	0	0%
1993	20.3	48	42	112%			1993	0	0	0	0%
1992	1.2	3	43	7%			1992	0	0	0	0%
1991	20.0	67	30	110%			1991	2.1	7	29	2100%
1990	5.7	15	39	31%			1990	0.0	0	0	0%
1988	10.0	26	39	55%			1989	0.0	0	0	1%
1984	28.1	73	38	154%			1988	0.0	0	0	1%
1983	27.4	71	38	151%			1987	0.0	0	0	1%
1977	0.0	0	0	0%			1986	0.0	0	0	1%
average	18.2						average	0.1
			Snow Survey report May first            Page   2
Big Cottonwood watershed								City Creek watershed
Brighton Cabin snow course     elevation 8700'     81 years of record								City Creek Lakes snow course     elevation 7550'     19 years of record
water content		snow depth	density	percent	date of			water content		snow depth	density	percent	date of
year	(inches)	(inches)	(percent)	of normal	sampling			year	(inches)	(inches)	(percent)	of normal	sampling
2002	15.9	36	44	65.7%	2-May			2002	18.9	40	47	97%	30-Apr
2001	18.3	47	44	75.6%				2001	21.4	43	50	110%
2000	12.8	29	44	52.9%				2000	6.9	14	49	36%
1999	26.6	67	40	109.9%				1999	19.4	44	44	100%
1998	29.3	63	47	121.1%				1998	33.4	65	51	172%
1997	31.9	75	43	131.8%				1997	28.2	64	44	145%
1996	33.8	77	44	139.7%				1996	30.1	67	45	155%
1995	36.4	83	44	150.4%				1995	26.7	60	45	138%
1994	18.6	54	35	76.9%				1994	17.3	39	45	89%
1993	33.8	87	39	139.7%				1993	26	51	50	134%
1991	21.0	52	40	86.8%				1992	0	0	0	0%
1988	0.3	1	43	1.2%				1991	26.1	75	35	135%
1984	32.5	84	39	134.3%				1990	0	0	0	0%
1983	36.2	103	35	149.6%				1989	13.1	24	55	68%
1977	10.6	44	24	43.8%				1988	4.2	9	47	22%
1952	43.2	130	31	178.5%				1984	43.2	89.0	49.0	223%
average	24.2							average	19.4
Silver Lake snow course     elevation 8700'     68 years of record								Louis Meadow snow course     elevation 6700'     26 years of record
water content		snow depth	density	percent	date of			water content		snow depth	density	percent	date of
year	(inches)	(inches)	(percent)	of normal	sampling			year	(inches)	(inches)	(percent)	of normal	sampling
2002	20.8	40	53	78.2%	2-May			2002	2.2	5	43	51%	30-Apr
2001	26.7	58	46	100.4%				2001	7.2	16	45	167%
2000	18.7	33	57	70.3%				2000	0	0	0	0%
1999	27.9	61	46	104.9%				1999	8.3	18	46	193%
1998	31.8	66	48	119.5%				1998	18.6	39	47	433%
1997	35.4	70	50	133.1%				1997	6.1	18	33	142%
1996	35.2	69	51	132.3%				1996	14.9	31	48	347%
1995	34.1	76	45	128.2%				1995	12	25	48	279%
1994	22.6	52	43	85.0%				1994	1.7	5.6	30	40%
1993	37.1	84	44	139.5%				1993	9.6	20	49	223%
1992	7.7	12	63	28.9%				1992	0	0	0	0%
1991	28.6	61	47	107.5%				1991	10.4	36	28	242%
1990	17.0	36	47	63.9%				1990	0.0	0	0	0%
1989	19.4	46	42	72.9%				1989	0.0	0	0	0%
1988	14.2	32	45	53.4%				1988	0.0	0	0	0%
1984	32.9	78	43	123.7%				1987	0.0	0	0	0%
1983	36.2	89	40	136.1%				1986	3.3	7	45	77%
1977	0.1	1	10	0.4%				1985	0	0	0	0%
1952	37.7	77	49	141.7%				average	4.3
average	26.6
Mill D snow course     elevation 7400'     68 years of record								Hidden Springs snow course     elevation 5500'     21 years of record
water content		snow depth	density	percent	date of			water content		snow depth	density	percent	date of
year	(inches)	(inches)	(percent)	of normal	sampling			year	(inches)	(inches)	(percent)	of normal	sampling
2002	5.8	12	50	45.3%	2-May			2002	0	0	0	0%	30-Apr
2001	8.3	20	41	64.8%				2001	0	0	0	0%
2000	2	5	40	15.6%				2000	0	0	0	0%
1999	12.4	29	43	96.9%				1999	0	0	0	0%
1998	15.6	33	47	121.9%				1998	0	0	0	0%
1997	15.5	36	43	121.1%				1997	0	0	0	0%
1996	20.8	48	43	162.5%				1996	0	0	0	0%
1995	16	37	43	125.0%				1995	0	0	0	0%
1994	6.1	19	32	47.7%				1994	0	0	0	0%
1993	13.7	29	47	107.0%				1993	0	0	0	0%
1992	0	0	0	0.0%				1992	0	0	0	0%
1991	13.6	42	32	106.3%				1991	1.1	4	26	550%
1990	0.3	2	17	2.3%				1990	0.0	0	0	0%
1989	1.1	10	11	8.6%				1989	0.0	0	0	0%
1988	2.8	8	35	21.9%				1988	0.0	0	0	5%
1984	25.5	61	42	199.2%				1984	3.0	9	33	1500%
1983	26.0	63	41	203.1%				1983	0.0	0	0	5%
1977	0.0	0	0	0.1%				average	0.2
1952	16.2	39	42	126.6%
average	12.8			Big Cottonwood % of normal			63%
					City Creek % of normal		74%
		Entire Snowpack Percent of Normal
		above 7500 feet :		77.7%
		7500 feet and lower :		68.6%
		Total snowpack:		75.0%
Narrative:
	The May 1 snow course measurements are highly variable due to the fact that some
snowcourses are melting off and others have not yet felt the affects of the warmer melt temperatures.
This is very much the case in 2002.  The lower snowcourses have been depleted of snow and the
high elevation snow pack is just now starting to lose water.
Emigration stream has peaked at 98 % of normal and about 2 1/2 weeks early due to
record breaking temperatures in mid April.  This peak however was twice that of runoff in 2001.
Predictions for the remainder of the 5 streams to peak and general flow volumes for 2002 remain
optimistic at 75% to 90% of normal.  The runoff temperatures as of now has been fairly cool and volumes have
not had a good chance to come up for any extended time period.  I expect our peaks to be about a week earlier
than normal based on the extremely high densities measured this month and the lower amount of water available to peak.
Dan Schenck / Hydrologist - SLC Public Utilities