Table 6. Maximum waterlevels expected upstream of the ICS

Figure 21. Ice-jam profiles induced by the ICS at three discharges, with ice volume limited according to Figure 16.

DISCUSSION - TR00-140028

TR00-14
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WS 15600 cfs - Plan 90

WSWS00 cf60Plans6

100 15s - 0 cf 8 -

WS 9000 cfs - Plan 86

WS 10000 cfs - Plan 86

WS 7000 cfs - Plan 84

WS 9000 cfs - Plan 86

WS 7000 cfs - Plan 84

Figure 22. Maximum waterlevels expected upstream of

the ICS, showing the governing discharge for various sec-

tions of the river. All profiles are for ice jams except 15,600-

cfs profile (100-year open water).

Main Channel Distance (ft)

Table 6. Maximum waterlevels expected upstream of the ICS. Note that the ICS has no

effect beyond about 9600 ft upstream, where the 100-year open-water profile dictates maximum

waterlevels. The ICS is located at the site originally proposed for the weir-with-pier ICS (USACE

1986a, 1986b), identified as RS 337.27 in Cazpfe HEC-2 deck.

Maximum water

upstream of ICS

surface elevation

Open water or

ice conditions

Winspear Subdivision

Winspear Subdivision

Leydecker House

Western Governors University

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