Table 2. Overview of discharge-based reaches.
Reach
Upstream
Downstream
Known jam initiation
River
no.
station
station
points within reach*
mile
1
Yankton
Sioux City
Scotland
797
2
Sioux City
Omaha
Decatur
691
Blair
648
3
Omaha
Nebraska City
South Bend
596
4
Nebraska City
Rulo
Randolph
548
Hamburg
542
Brownville
535
5
Rulo
St. Joseph
Falls City
495
White Cloud
488
Verdun
491
Clarind
474
Burlington Junction
470
Maryville
466
St. Joseph
448
6
St. Joseph
Kansas City, Mo.
Atchison
422
Leavenworth
396
Diagonal Creek
395
Agency
393
Smithville/Platte City
392
Kansas City, Ks.
374
Kansas City, Mo.
370
Bonner Springs/DeSoto
368
Kansas City, Mo.
366
7
Kansas City
Waverly
Grand Ave
365
Choteau Brook
362
Lake City
339
Sibley
336
Napoleon
329
Richman
312
Waverly
293
8
Waverly
Booneville
Sumner
250
Prairie Hill
239
Glasgow
226
Valley City
217
Clifton Creek
202
9
Booneville
Hermann
Fayette
186
Booneville West
178
Moniteau Creek
158
Jefferson City/
Capital City WW
144
Bagnell Dam
130
Chamois
117
Rich Falls
104
Hermann
98
*Initiation points from MRD ice data sheets
Approximate river mile of initiation points shown
major tributaries between Gavins Point Dam and the
reach decreased below the discharge at the upstream
gage at Yankton. Therefore, for this analysis, changes
station (a "dip"), an ice event was assumed to have
in discharge at Gavins Point Dam are assumed to
occurred in the intervening reach beginning on that
cause corresponding changes in discharge at
date.
Yankton.
Some ice jam events may have caused a decrease
The plots of discharge data were used to estimate
in discharge large enough to cause problems al-
ice jam events in the following manner: If the dis-
though still not decreasing discharge enough to
charge of the station at the downstream end of the
cause a dip between upstream and downstream
4