Call number:
ZSP-201-88/1
In:
CRREL Report, 88-1
Description / Table of Contents:
The Cornish-Windsor bridge is the longest covered bridge in the United States and has significant historical value. At a large peak flow, dynamic ice breakup of the Connecticut River can threaten the bridge and cause flood damage in the town of Windsor, Vermont. Throughout the 1985-86 winter we regularly monitored ice conditions, including a midwinter dynamic ice breakup on 27 January. We conducted controlled release tests over the operating range of the turbines at Wilder Dam upstream during both open water and ice cover conditions. These data and observations were analyzed in light of more than 60 years of temperature and discharge records. Our analysis indicates that river regulation presents alternatives for ice management that would minimize the probability of bridge damage and flooding during breakup. The flow can be regulated early in the winter to promote the growth of a stable ice cover, minimizing the total ice production in the reach. In the weeks prior to breakup, sustained releases and above-freezing air temperatures cause melting, weakening and gradual breakup of the ice, greatly reducing the flooding potential. Also, it is possible to produce a controlled ice breakup prior to an imminent natural event at lower stage and discharge. All of these ice control alternatives have associated power production costs.
Type of Medium:
Series available for loan
Pages:
iii, 21 Seiten
,
Illustrationen
Series Statement:
CRREL Report 88-1
URL:
https://apps.dtic.mil/dtic/tr/fulltext/u2/a195329.pdf
URL:
https://hdl.handle.net/11681/9026
Language:
English
Note:
CONTENTS
Abstract
Preface
Introduction
Background
Analysis of historical data
Field observations
Controlled release tests
January 1986 ice breakup
Connecticut River ice control
Minimizing ice production
Hydrothermal melting
Controlled ice breakup
Conclusions
Literature cited
Appendix A: Detailed ice breakup chronology
Location:
AWI Archive
Branch Library:
AWI Library
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