Text / PRELIMINARY RESULTS OF A DAM-REMOVAL ANALYSIS ON BREWSTER CREEK NEAR ST. CHARLES, ...

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Title
PRELIMINARY RESULTS OF A DAM-REMOVAL ANALYSIS ON BREWSTER CREEK NEAR ST. CHARLES, ILLINOIS, 2002-2004
Creator
D.P. Roseboom
G.P. Johnson
K.M. Kosky
T.D. Straub
Kane County Department of Environmental Management
USGS
Date Created and/or Issued
2004
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: The benefits of gradually removing a dam (through multiple notches) are to reduce the total project cost and reduce possible environmental effects by allowing the impounded sediment to slowly move downstream, and a stable stream and revegetated floodplain to form upstream. Notching, in this study of a dam on Brewster Creek, near St. Charles, Illinois, involves cutting a given height (in five 12--18 inch notches over approximately a 9 month period) across the length (or some portion of the length) of the dam. Brewster Creek is a tributary of the Fox River in northeastern, Illinois. Sediment, dissolved oxygen, and geomorphic response are being monitored before, during, and after a gradual (notching) removal of the dam. The study area includes the creek reach immediately below the dam and above the lake. Preliminary data analysis indicate that during and after the removal, the relation between the sediment transported to the study area from upstream and the sediment transported out of the study area remained relatively stable. This preliminary result indicates that the notching system created a fairly slow and predictable sediment transport response to storms, when compared to known upstream sediment loads. This result corresponds to the slow geomorphic response at the site since inception of the notching sequence in 2003. The creek responded to the five notches removed over the course of 9 months by gradually cutting through the former lakebed sediment to establish a meandering channel. Notchings did not appreciably affect dissolved oxygen concentrations in Brewster Creek.
Scope/Content: Date removed: 2003.
Type
text
Form/Genre
digital copy
Identifier
ark:/86086/n25q4vrg
493
Language
English
eng
Subject
Sediment and channel dynamics
Dams
Dam retirement
Place
Brewster Creek, IL
Fox River, IL
United States

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