Table A4. Number of respondents using various data collection methods, by Division (as
of 1995).
Missouri North
North
New
North
Ohio
South
South-
River
Atlantic
Central
England
Pacific
River
Pacific
western
Total
From shore
or structure
29
8
24
1
5
4
1
0
72
From motor vehicle
20
7
10
1
3
2
0
0
43
From boat
1
0
0
0
2
0
1
0
4
From aircraft
4
2
4
1
1
1
0
0
13
From ice surface
9
0
15
1
1
0
0
0
26
DCP
10
6
4
1
4
0
1
0
26
Satellite imagery
0
1
2
0
0
0
0
0
3
Other agency
9
7
3
1
6
0
1
0
27
Volunteer observers
4
1
3
1
0
0
0
0
9
Corps personnel
28
9
26
1
6
4
2
0
76
Other
7
0
4
0
1
1
0
0
13
Table A5. Number of respondents using various instrumentation, by Division (as of 1995).
Missouri North
North
New
North
Ohio
South
South-
River
Atlantic
Central
England
Pacific
River
Pacific
western
Total
Ice thickness kit
4
3
17
1
1
0
0
0
26
Thermistor
1
0
0
0
0
0
0
0
1
Thermometer
7
0
12
0
1
3
0
0
23
Velocity meter
0
0
2
0
0
0
0
0
2
Camera
4
6
3
1
1
2
0
0
17
Video camera
4
2
2
1
0
2
0
0
11
Other
6
2
6
0
3
2
0
0
19
Table A6. Frequency of ice impacts to structures or operations, by Division (as of 1995).
Missouri North
North
New
North
Ohio
South
South-
Structure or
Number of
River
Atlantic
Central
England
Pacific
River
Pacific
western
operation
respondents
31
11
32
11
10
4
2
1
Navigational
Every year
0
0
13
0
0
0
0
0
locks
Most years
0
0
3
0
1
1
0
0
Rarely
0
1
3
0
2
3
0
0
Navigational
Every year
0
0
4
0
0
0
0
0
structures
Most years
0
0
6
0
1
0
0
0
Rarely
1
2
2
0
1
2
0
0
Navigation
Every year
0
0
10
0
2
0
0
0
traffic
Most years
2
1
6
0
1
1
0
0
Rarely
0
1
1
0
2
3
0
0
Hydroelectric
Every year
1
0
1
1
0
0
0
0
power
Most years
0
0
3
0
0
0
0
0
generation
Rarely
4
1
0
0
6
2
0
0
Municipal water
Every year
0
0
0
0
0
0
0
0
supply intakes
Most years
1
0
0
0
0
0
0
0
Rarely
6
2
3
1
2
2
0
1
Every year
2
0
1
1
0
0
0
0
water intakes
Most years
1
0
1
0
0
0
0
0
Rarely
2
2
1
0
5
2
0
0
Flood control
Every year
5
1
10
0
1
0
0
0
structures
Most years
4
1
4
1
1
1
0
0
Rarely
11
8
7
0
6
3
1
1
38
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