Table 3. Analysis of major ice jam events, Fort Fairfield, Maine.
Ice
Snow
FDD*
thickness
Dmax
Qmax W
Qmax FF
DQmax
DQ10
DQ10Dmax
DQmaxDmax
Q10
(F)
(ft3/s)
(ft3/s)
Year
(in.)
(J.D.)†
(J.D.)
(J.D.)
(J.D.)
(J.D.)
(in.)
1932
--
--
--
20,900
28,215
196
192
--
--
--
10,700
14,445
192
192
1936
--
--
--
37,000
49,950
174
171
--
--
--
13,500
18,225
171
171
1940
1874
26
190
26,100
35,235
197
197
7
7
63
16,600
22,410
200
197
7
10
1973
371
12
81
14,000
18,900
85
84
3
4
32
14,000
18,900
85
84
3
4
1976
2440
30
174
31,000
41,850
188
182
8
14
131
27,600
37,260
186
182
8
12
1991
1790
25
183
35,800
48,330
194
181
2
11
93
14,200
19,200
196
189
6
13
* Freezing degree-days.
† Julian Days.
essarily correspond to the actual river discharges
on other rivers. Not all proved useful on the
present during peak flooding, but they are un-
Aroostook, however. For example, the calculated
questionably closer to the correct values than
ice thickness varies modestly between 24 and 31
peak discharges for the entire events.
in., and three out of the four major floods in Ta-
The variables selected for review in Tables 2
ble 3 for which data were available had below-
and 3 are those that we have found to be signifi-
average ice thickness. Similarly, while the very
cant indicators of river behavior during breakup
large ice jam flood of 1976 happened during a
Table 4. Field trips.
Date
Sites visited
Date
Sites visited
Mountain
Mid-November St. John River (Fort KentNine Mile).
gaging station. Also Grand Isle to Fort Kent
Aroostook River (Fort FairfieldMasardis).
and 10 miles of Allagash River.
12 Dec 91
Aerial flight from Tinker Dam to the
Aroostook River: Washburn to Fort Fair-
Oxbow on Aroostook River and to split
field.
between Northwest and Southwest
2425 Mar 92
Aroostook River: Fort Fairfield to the
Branches of St. John River.
Oxbow.
16 Dec 91
Repeat of 12 Dec aerial flights.
29 Mar 92
Aroostook River: The Oxbow to Washburn.
17 Dec 91
Overland visit of Nine Mile site.
3031 Mar 92
Aroostook River: Fort Fairfield, Masardis.
2223 Dec 91
Overland: Nine Mile to Big Black River on
1 Apr 92
Public meeting at Fort Kent.
St. John River.
4 Apr 92
Aroostook River.
30 Dec 91
St. John River: Allagash to Seven Islands.
7 Apr 92
Aerial Flight: Source of Aroostook River to
79 Jan 92
St. John River: Nine Mile to DickeyVan
Fort Fairfield, then up the St. John River to
Buren to Fort Kent.
about Nine Mile.
Aroostook River: Fort Fairfield to Wash-
burn.
9 Apr 92
Aroostook River: Masardis to Fort Fairfield.
2124 Jan 92
St. John River: Dickey to Baker Branch.
13 Apr 92
Aroostook River.
Aroostook River: Washburn to Ashland.
1718 Apr 92
Aroostook and St. John Rivers.
2426 Feb 92
St. John River: Nine Mile (installation of ice
Aerial flight: Frenchville to Daaquam River
motion detector) to Seven Islands, Big Black
and Baker bridge.
River gage near Depot Mountain.
21 Apr 92
Aroostook River: Fort Fairfield to Caribou.
27 Feb 92
Aerial video: Caribou to Fort Fairfield on
St. John River: Flight from Fort Kent to
Aroostook River then up St. John River to
Northwest Branch.
Nine Mile.
22 Apr 92
St. John River: Daaquam River to Nine Mile.
1112 Mar 92
St. John River: Daaquam River to Fort
23 Apr 92
Nine Mile to Big Black, Depot Mountain
Kent, and up Big Black River to Depot
gage to Fort Kent.
6
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