FLOOD02128

• County: Morgan
• Community: Weldona
• Basin: South Platte
• Title: Weldona Flood Hazard Mitigation Feasibility Study
• Date: 9/23/1998
• Prepared For: Morgan County
• Prepared By: Consultants
• Floodplain - Doc Type: Community File

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COMMUMITYOF WELDONA
MORGAN COUNTY, COLORADO

Conceptual Flood Hazard Mitigation Alternatives

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The basic flood hazard mitigation opportunities that exist for Weldona are presented in the
following table.

'DesCti6tion'ofAltemative:~~,ijiY~::i~ttW;+1:ii4 . jiilEStimatedCOStij'j j~.!FeliSibilitvjUVefhl'!
Relocate Weldona $3,000,000 Low
Floodproof or elevate structures $1,000,000 High
Structural Flood Control Measures $600,000 High
Do nothing $0 Low

The cost estimates shown above are very preliminary and should be used for comparison
purposes only. Detailed cost estimates should be established prior to selection and
implementation of the desired mitigation alternative. On behalf of Morgan County, the CWCB is
developing conceptual design plans for the "Structural Flood Control Measures" alternative. The
structural alternative may consist of the following features:

· Improve capacity of existing drainage channel that runs parallel to the railroad embankment.

· Construct new drainage channel from Highway 144 to the South Platte River along CR 9
(R.O.w. acquisition will be required).

· Remove existing undersized culverts at several locations and replace with larger culverts.
Add new culverts at two locations to increase flow capacity.

· Construct a flow channel along Warren Street by lowering the street, inverting the crown, and
paving the street surface.

. Construct a ring levee to protect the school buildings.

· Construct a diversion dike to direct upstream flows to the Warren Street flow channel.

· Raise the elevation of two roadways and provide culverts to the improved drainage ditch.

. Remove the existing railroad trestle bridge (east of Weldona).