Figure 44. Discharge from the Fort Peck Dam with measurements from the Wolf Point and Culbertson gages

Figure 43. Ice conditions at the Culbertson site on 17 March 1999 in the early stages of breakup

FINDINGS AT SURVEY SITES

TR02-14
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ERDC/CRREL TR-02-14

Figure 44. Discharge from the Fort Peck Dam with measurements from the Wolf Point and

Culbertson gages.

survey sites; the USGS gages otherwise closest to the sites (Wolf Point and

Culbertson) were ice-affected and could not be used to determine flow rate, but

the provisional data from these gages are included in Figure 44.

The Fort Peck data in Figure 44 show that the flow rate in the river increased

with the onset of winter, attained a peak that was sustained for almost two

months during winter, and then decreased during late winter and into spring.

Freeze-up at the Culbertson and Pipal sites, which occurred on 20 and 21

December, respectively, coincided with river flows of about 10,000 cfs.

Throughout much of January and February, flow at those sites was almost 12,000

cfs. During the melt-out and gradual breakup of the ice cover in the reach, the

flow release from Fort Peck was on the order of 12,000 cfs. At the end of Febru-

ary and into the first few days of March, the flow rate dropped rapidly to less

than 9,000 cfs.

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