Table 1

Table 1.--Snowmelt-season landslide events.

Event no.

Date

Type of landslide

Reference area or town

Estimated volume (m³)

Elevation
(m)

Reference

1*

6/23/25

Debris avalanche

Jackson Hole, Wyoming

40 x 10⁶

2740
Voight, 1978

2

4/19/79

Debris slide/flow

Mesa Verde National Park, Colorado

<1 x 10³

2375
Montezuma Valley Journal, 4/20/79

3

4/29/79

do.

do.

2 x 10³

2390

do.

4

4/30/79

do.

do.

1.2 x 10³

2375

do.

5*

5/24/79

Debris flow

Pagosa Springs, Colorado

2 x 10³

2990
The Pagosa Springs Sun, 5/31/79

6

5/21/82

do.

Steamboat Springs, Colorado

<1 x 10³

2286
Steamboat Pilot, 5/27/82

7

5/27/83

do.

Redstone, Colorado

<1 x 10³

2710
Glenwood Post, 5/31/83

8*

5/30/83

Rock and soil slide

Glenbrook, Nevada

7.2 x 10⁵

2500
Watters, 1983

9*

5/30/83

Debris flow

Farmington, Utah

?

2110
Kaliser, 1983; Wieczorek, 1989

10

5/12/84

do.

Steamboat Springs, Colorado

<1 x 10³

2075
Steamboat Pilot, 5/17/84

11*

5/13/84

do.

Fairview, Utah

?

2620
Fleming and Schuster, 1985

12

5/13/84

Debris flow

Telluride, Colorado

?

2925
Telluride Times, 5/17/84

13

5/14/84

Slide/flow

Oak Creek, Colorado

<1 x 10³

2225
Steamboat Pilot, 5/17/84

14*

5/14/84

Slide/debris flow

Layton, Utah

1 x 10³

2225
Olson, 1985

15*

5/23/84

do.

Farmington, Utah

<9 x 10³

2110
McCarter and others, 1985

16

6/1/84

Slide/debris flow

Silverthorne, Colorado

?

2680
Summit County Journal, 6/14/84

17

4/16/85

Slump/debris flow

Granby, Colorado

4 x 10³

2490
Schuster, 1986

18

4/26/85

Slump/earthflow

DeBeque, Colorado

?

1950
Umstot, 1989

19

4/30/87

Slides/debris flows

Telluride, Colorado

2.5 x 10⁴

2745
Stover and others, 1987

20

5/19/93

Debris flow

Steamboat, Colorado

?

2500
Steamboat Pilot, 5/27/93

21

5/27/93

do.

Aspen, Colorado

?

2925
Aspen Daily News, 5/28/93

22

5/8/96

do.

Silverthorne, Colorado

4 x 10³

2650
Chleborad, unpublished field notes, 1996

23

5/13/96

Debris flow

Aspen, Colorado

3.8 x 10³

2955
Chleborad, 1996; Chleborad and others, 1997

24*

4/29/97

do.

Clark, Colorado

<1 x 10³

2205
Steamboat Pilot, 4/30/97

25*

5/18/97

Slump/debris flow

Jackson Hole, Wyoming

4.6 x 10⁵

2180
G. Michael Hager, Wyoming Department of Transportation personal comm., 1997

26*

5/26/97

Earthflow

Moran, Wyoming

1.1 x 10⁵

2500
U.S. Forest Service, internal memorandum, 5/28/97

27*

5/26/97

Debris flow

Aspen Colorado

<1 x 10³

2940
Chleborad and others, 1997

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Event no.	Date	Type of landslide	Reference area or town	Estimated volume (m³)	Elevation (m)	Reference
1*	6/23/25	Debris avalanche	Jackson Hole, Wyoming	40 x 10⁶	2740	Voight, 1978
2	4/19/79	Debris slide/flow	Mesa Verde National Park, Colorado	<1 x 10³	2375	Montezuma Valley Journal, 4/20/79
3	4/29/79	do.	do.	2 x 10³	2390	do.
4	4/30/79	do.	do.	1.2 x 10³	2375	do.
5*	5/24/79	Debris flow	Pagosa Springs, Colorado	2 x 10³	2990	The Pagosa Springs Sun, 5/31/79
6	5/21/82	do.	Steamboat Springs, Colorado	<1 x 10³	2286	Steamboat Pilot, 5/27/82
7	5/27/83	do.	Redstone, Colorado	<1 x 10³	2710	Glenwood Post, 5/31/83
8*	5/30/83	Rock and soil slide	Glenbrook, Nevada	7.2 x 10⁵	2500	Watters, 1983
9*	5/30/83	Debris flow	Farmington, Utah	?	2110	Kaliser, 1983; Wieczorek, 1989
10	5/12/84	do.	Steamboat Springs, Colorado	<1 x 10³	2075	Steamboat Pilot, 5/17/84
11*	5/13/84	do.	Fairview, Utah	?	2620	Fleming and Schuster, 1985
12	5/13/84	Debris flow	Telluride, Colorado	?	2925	Telluride Times, 5/17/84
13	5/14/84	Slide/flow	Oak Creek, Colorado	<1 x 10³	2225	Steamboat Pilot, 5/17/84
14*	5/14/84	Slide/debris flow	Layton, Utah	1 x 10³	2225	Olson, 1985
15*	5/23/84	do.	Farmington, Utah	<9 x 10³	2110	McCarter and others, 1985
16	6/1/84	Slide/debris flow	Silverthorne, Colorado	?	2680	Summit County Journal, 6/14/84
17	4/16/85	Slump/debris flow	Granby, Colorado	4 x 10³	2490	Schuster, 1986
18	4/26/85	Slump/earthflow	DeBeque, Colorado	?	1950	Umstot, 1989
19	4/30/87	Slides/debris flows	Telluride, Colorado	2.5 x 10⁴	2745	Stover and others, 1987
20	5/19/93	Debris flow	Steamboat, Colorado	?	2500	Steamboat Pilot, 5/27/93
21	5/27/93	do.	Aspen, Colorado	?	2925	Aspen Daily News, 5/28/93
22	5/8/96	do.	Silverthorne, Colorado	4 x 10³	2650	Chleborad, unpublished field notes, 1996
23	5/13/96	Debris flow	Aspen, Colorado	3.8 x 10³	2955	Chleborad, 1996; Chleborad and others, 1997
24*	4/29/97	do.	Clark, Colorado	<1 x 10³	2205	Steamboat Pilot, 4/30/97
25*	5/18/97	Slump/debris flow	Jackson Hole, Wyoming	4.6 x 10⁵	2180	G. Michael Hager, Wyoming Department of Transportation personal comm., 1997
26*	5/26/97	Earthflow	Moran, Wyoming	1.1 x 10⁵	2500	U.S. Forest Service, internal memorandum, 5/28/97
27*	5/26/97	Debris flow	Aspen Colorado	<1 x 10³	2940	Chleborad and others, 1997