Text / Conecpt Design Report, Brown Bridge Dam Removal

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Title: Conecpt Design Report, Brown Bridge Dam Removal
Creator: Inter-Fluve Inc.
Date Created and/or Issued: 1/31/12
Contributing Institution: UC Riverside, Library, Water Resources Collections and Archives
Collection: Clearinghouse for Dam Removal Information (CDRI)
Rights Information: Copyrighted
Transmission or reproduction of materials protected by copyright beyond that allowed by fair use requires the written permission of the copyright owners. Works not in the public domain cannot be commercially exploited without permission of the copyright owner. Responsibility for any use rests exclusively with the user.
Description: Scope/Content: Abstract: This report presents a final conceptual plan for the restoration for the Boardman River within the Brown Bridge impoundment following the removal of the Brown Bridge Dam located near Traverse City, Michigan. Design for the removal and restoration of the Brown Bridge impoundment has progressed along a pragmatic path and is supported by data collection and field observation. Based on the observations to date, three concepts have been developed for review by the project stakeholders and all interested parties. Concepts were developed along a gradient from active to passive restoration of the former impoundment. Active restoration involves the construction of a restored channel within a short time period following removal. All attendant features are constructed in place for the development of a functioning river channel, with shortterm vegetation management supporting long-term succession goals. In contrast, passive restoration includes limited, if any, active restoration within the channel, and typically limited management of the resulting colonizing vegetation. The passive approach allows the river itself to act as the mechanism to re-establish a river channel and its attendant floodplain. A number of options lie between these two extremes that borrow elements of both active and passive restoration. It is important to note that the outcome of dam removal is similar regardless of the restoration approach pursued - a return to the functions and features of a river channel. The difference among these approaches is the time and cost in arriving at this common endpoint. Specific levels of cost and features inherent in the restoration approaches along the gradient between active and passive are presented as well. This information provides a foundation for understanding and informed discussion of the benefits and drawbacks of various approaches; resulting ultimately in the decision to move forward into final design with a preferred approach for restoration.
Scope/Content: Dam type: earthen
Scope/Content: Dam type: embankment
Scope/Content: Length: 1,800 ft feet.
Scope/Content: Date constructed: 1921.
Type: text
Identifier: ark:/86086/n2rx9bpm
1415
Subject: Ecology and river restoration
Dams
Dam retirement
Place: Boardman River, MI
Brown Bridge Dam

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