References
America’s Byways. N/D. America’s Byways website. http://www.byways.org/browse/byways/10390/before_you_go.html
California Department of Transportation (“CALTRANS”). 1999. “Snow and Ice Control Operations, Avalanche Control Areas.” Pp. 13-14. www.dot.ca.gov/hq/roadinfo/snwicecontrol.pdf
Colorado Avalanche Information Center. N/D. “US & World Avalanche Statistics.” CAIC Web Site. http://geosurvey.state.co.us/avalanche/
Committee on Ground Failure Hazards Mitigation Research. 1990. "Snow Avalanche Hazards and Mitigation in the United States." National Academy Press. 1990.
Intelligent Transportation Systems. N/D. “Corridor Management During Avalanches.” Joint Program Office. U.S. Dept of Transportation web site.: http://itsdocs.fhwa.dot.gov/inform/p25.htm
Ketchum, ID. N/D. “Avalanche Zone District (A).” Zoning Code Section 17.92. http://www.ketchumidaho.org/pdf/zone17.92Avalanch.pdf
Mears, Arthur. 2002. Avalanche Zoning. http://www.avalanche.org/~moonstone/zoning/AVALANCHE%20ZONING.htm.
Merriam-Webster. N/D. Merriam-Webster Website.www.m-w.com
Michigan Technological University. N/D. Department of Geological/Mining Engineering & Sciences web site. http://www.geo.mtu.edu/department/classes/ge404/rhsawall/passive.html
National Avalanche Center. N/D. US Forest Service Website. http://www.avalanche.org/~nac/basics/sled_index.html
National Snow and Ice Data Center. N/D. “Avalanche Awareness .” NSIDC Website. http://nsidc.org/snow/avalanche/index.html
Orator.com. 2003. “108th CONGRESS, 1st Session,
S.931 - Federal Land Recreational Visitor Protection Act of 2003.” Orator.com Website. http://www.theorator.com/bills108/s931.html
Washington State Department of Transportation. N/D. “I-90, Snoqualmie Pass East.” http://www.wsdot.wa.gov/projects/I90SnoqualmiePassEast/
STATE
|
85-86
|
86-87
|
87-88
|
88-89
|
89-90
|
90-91
|
91-92
|
92-93
|
93-94
|
94-95
|
95-96
|
96-97
|
97-98
|
98-99
|
99-00
|
00-01
|
01-02
|
02-03
|
03-04
|
19-winter totals
|
CO
|
4
|
11
|
5
|
4
|
4
|
6
|
9
|
12
|
1
|
9
|
7
|
1
|
6
|
6
|
8
|
4
|
8
|
6
|
3
|
114
|
AK
|
0
|
6
|
2
|
1
|
1
|
1
|
2
|
7
|
2
|
6
|
8
|
4
|
3
|
12
|
5
|
4
|
11
|
4
|
3
|
82
|
UT
|
5
|
2
|
0
|
0
|
1
|
0
|
5
|
3
|
1
|
5
|
2
|
6
|
2
|
5
|
2
|
6
|
3
|
1
|
4
|
53
|
MT
|
2
|
1
|
0
|
0
|
1
|
0
|
1
|
1
|
6
|
3
|
3
|
1
|
7
|
2
|
2
|
7
|
10
|
4
|
0
|
51
|
CA
|
2
|
0
|
0
|
0
|
1
|
0
|
2
|
1
|
0
|
2
|
0
|
0
|
1
|
1
|
0
|
2
|
1
|
1
|
1
|
15
|
WA
|
2
|
0
|
1
|
0
|
0
|
0
|
2
|
0
|
0
|
1
|
0
|
5
|
2
|
4
|
1
|
3
|
0
|
1
|
7
|
29
|
WY
|
2
|
0
|
0
|
0
|
0
|
0
|
2
|
1
|
1
|
1
|
3
|
2
|
1
|
2
|
0
|
7
|
1
|
7
|
1
|
31
|
ID
|
0
|
1
|
0
|
0
|
0
|
0
|
0
|
2
|
0
|
0
|
3
|
3
|
3
|
0
|
2
|
0
|
1
|
3
|
4
|
22
|
OR
|
0
|
0
|
0
|
1
|
0
|
0
|
0
|
1
|
2
|
0
|
0
|
0
|
1
|
0
|
0
|
0
|
0
|
0
|
0
|
7
|
NV
|
0
|
0
|
0
|
1
|
0
|
0
|
1
|
0
|
0
|
0
|
0
|
0
|
0
|
0
|
0
|
0
|
0
|
1
|
0
|
3
|
NH
|
0
|
0
|
0
|
0
|
0
|
1
|
0
|
0
|
0
|
0
|
3
|
0
|
0
|
0
|
1
|
0
|
0
|
2
|
0
|
7
|
NY
|
0
|
0
|
0
|
0
|
0
|
0
|
0
|
1
|
0
|
0
|
0
|
0
|
0
|
0
|
1
|
0
|
0
|
0
|
0
|
2
|
AZ
|
0
|
0
|
0
|
0
|
0
|
0
|
0
|
0
|
0
|
1
|
0
|
0
|
0
|
0
|
0
|
0
|
0
|
0
|
0
|
1
|
NM
|
0
|
0
|
0
|
0
|
0
|
0
|
0
|
0
|
0
|
0
|
1
|
0
|
0
|
0
|
0
|
0
|
0
|
0
|
0
|
1
|
total
|
17
|
21
|
8
|
7
|
8
|
8
|
24
|
29
|
13
|
28
|
30
|
22
|
26
|
32
|
22
|
33
|
35
|
30
|
23
|
416
|
http://geosurvey.state.co.us/avalanche/Default.aspx?tabid=49
Sidebar 3.2.2: Avalanche Fatalities in the World (by IKAR* countries), 1985/86 - 2003/04
|
85-86
|
86-87
|
87-88
|
88-89
|
89-90
|
90-91
|
91-92
|
92-93
|
93-94
|
94-95
|
95-96
|
96-97
|
97-98
|
98-99
|
99-00
|
00-01
|
01-02
|
02-03
|
03-04
|
19-year totals
|
Switzerland
|
34
|
15
|
24
|
16
|
28
|
38
|
13
|
28
|
21
|
20
|
17
|
24
|
13
|
36
|
20
|
32
|
24
|
21
|
11
|
435
|
France
|
40
|
24
|
24
|
17
|
22
|
47
|
28
|
23
|
23
|
23
|
44
|
23
|
35
|
44
|
28
|
30
|
29
|
26
|
26
|
556
|
Austria
|
43
|
31
|
37
|
14
|
12
|
20
|
9
|
23
|
13
|
24
|
37
|
27
|
11
|
50
|
39
|
22
|
17
|
34
|
8
|
471
|
Italy
|
27
|
16
|
38
|
11
|
14
|
38
|
10
|
24
|
24
|
12
|
10
|
13
|
14
|
12
|
16
|
29
|
7
|
24
|
22
|
361
|
Germany
|
2
|
3
|
0
|
0
|
1
|
8
|
1
|
3
|
1
|
1
|
3
|
4
|
0
|
3
|
0
|
1
|
3
|
3
|
0
|
37
|
Liechtenstein
|
0
|
0
|
0
|
0
|
0
|
0
|
0
|
0
|
0
|
0
|
0
|
0
|
0
|
0
|
0
|
0
|
2
|
0
|
0
|
2
|
Slovenia
|
7
|
1
|
0
|
0
|
0
|
1
|
0
|
0
|
3
|
1
|
6
|
0
|
1
|
1
|
0
|
1
|
0
|
2
|
2
|
26
|
Slovakia
|
nr
|
nr
|
nr
|
nr
|
nr
|
nr
|
0
|
nr
|
nr
|
4
|
4
|
2
|
5
|
0
|
2
|
5
|
5
|
4
|
6
|
37
|
Spain
|
4
|
1
|
0
|
7
|
6
|
21
|
6
|
2
|
0
|
6
|
2
|
4
|
0
|
nr
|
0
|
nr
|
nr
|
1
|
3
|
60
|
Andorra
|
nr
|
nr
|
nr
|
nr
|
nr
|
nr
|
nr
|
nr
|
nr
|
nr
|
nr
|
nr
|
nr
|
3
|
0
|
0
|
nr
|
nr
|
nr
|
3
|
U.K.
|
2
|
2
|
0
|
0
|
0
|
1
|
0
|
0
|
1
|
0
|
nr
|
nr
|
0
|
5
|
0
|
0
|
2
|
1
|
0
|
16
|
Croatia
|
nr
|
nr
|
nr
|
nr
|
nr
|
nr
|
nr
|
nr
|
nr
|
3
|
0
|
0
|
0
|
nr
|
0
|
0
|
nr
|
0
|
0
|
3
|
Norway
|
22
|
7
|
4
|
4
|
3
|
1
|
4
|
1
|
5
|
3
|
2
|
4
|
6
|
1
|
6
|
9
|
4
|
2
|
4
|
92
|
Poland
|
1
|
4
|
5
|
0
|
0
|
0
|
1
|
1
|
1
|
0
|
5
|
5
|
2
|
5
|
0
|
1
|
2
|
8
|
9
|
49
|
Czech Republic
|
0
|
1
|
4
|
0
|
0
|
1
|
nr
|
4
|
0
|
0
|
0
|
0
|
2
|
0
|
0
|
0
|
nr
|
nr
|
nr
|
12
|
Bulgaria
|
0
|
0
|
1
|
0
|
0
|
0
|
1
|
1
|
0
|
0
|
2
|
4
|
2
|
0
|
2
|
0
|
nr
|
nr
|
nr
|
13
|
Sweden
|
nr
|
nr
|
nr
|
nr
|
nr
|
nr
|
nr
|
nr
|
nr
|
nr
|
nr
|
nr
|
nr
|
nr
|
2
|
1
|
nr
|
nr
|
1
|
4
|
Canada
|
9
|
7
|
7
|
6
|
9
|
12
|
6
|
12
|
8
|
15
|
9
|
16
|
21
|
16
|
10
|
12
|
13
|
29
|
11
|
228
|
U.S.A.
|
17
|
21
|
8
|
7
|
8
|
8
|
24
|
29
|
13
|
28
|
30
|
22
|
26
|
32
|
22
|
33
|
35
|
30
|
23
|
416
|
TOTALS
|
210
|
133
|
152
|
81
|
101
|
196
|
103
|
151
|
112
|
140
|
171
|
148
|
138
|
208
|
147
|
176
|
143
|
184
|
126
|
2821
|
*IKAR = International Commission for Alpine Rescue nr = no report
http://geosurvey.state.co.us/avalanche/Default.aspx?tabid=109
Illustrations 3.2.1 and 3.2.2 – Examples of Snow Bridges
www.fao.org/docrep/ x5376e/x5376e04.htm
Illustration 3.2.3: Snow Fence
www.photolib.noaa.gov/ historic/nws/wea01920.htm
Illustration 3.2.4: Controlled Avalanche Explosive Detonation
www.explosives.org/ Uses.htm
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