FLOOD03677

• County: Larimer
• Community: Fort Collins
• Stream Name: Dry Creek
• Basin: South Platte
• Title: Major Drainageway Planning Dry Creek Technical Addendum
• Date: 4/1/1980
• Prepared For: Larimer County
• Prepared By: Gingery Associates, Inc.
• Floodplain - Doc Type: Floodplain Report/Masterplan

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operation season, which coincides with the cloudburst flood

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season. The irrigation canals most likely to affect flood flows
along Dry Creek are the Larimer and Weld Canal (Eaton Ditch),
the Larimer County Canal, Terry Inlet, the Poudre Valley Canal
and the North Poudre Ditch. Only the canals downstream of

Douglas Reservoir, i.e., the Larimer and Weld Canal, the Larimer

County Canal and the Terry Inlet, would contribute to a reduction

in peak flows in Fort Collins.

The approximate normal operating and bankful discharges for

these canals are shown in Table I.

Table I. Approximate Ditch Capacities

Normal Bankful Flood Interception
Canal Capacity Capacity Capacity
Larimer and Weld 700-cfs 1,000-cfs 300-cfs
Terry Inlet 100-cfs 200-cfs 100-cfs
Larimer County 575-cfs 700-cfs 125-cfs

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