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Effects of channel relocation and proposed bridge construction on floodflows of the Catawba River near Marion, North Carolina

Water-Resources Investigations Report 88-4207
By:
https://doi.org/10.3133/wri884207

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Abstract

The relocation of a part (about one-half a mile) of the Catawba River near Marion, North Carolina, and the proposed addition of a main bridge and an overflow bridge of U.S. Highway 221 have created the need for a current evaluation of the effects of these physical changes on floodflow in the river. The 100-year flood discharge, elevation-discharge relations, flood profiles, floodway, and flooding effects were determined for 1988 and for proposed bridge conditions. Analysis of data indicates that for the 100-year flood, the maximum amount of backwater effect from the proposed bridges would be 1.2 feet, and backwater would extend upstream about 6,800 feet. The 100-year flood elevation in the relocated channel reach will be about 6 feet lower than elevations determined in a 1983 U.S. Soil Conservation Service flood study.

Suggested Citation

Stamey, T.C., 1989, Effects of channel relocation and proposed bridge construction on floodflows of the Catawba River near Marion, North Carolina: U.S. Geological Survey Water-Resources Investigations Report 88-4207, iii, 16 p., https://doi.org/10.3133/wri884207.

Study Area

Publication type Report
Publication Subtype USGS Numbered Series
Title Effects of channel relocation and proposed bridge construction on floodflows of the Catawba River near Marion, North Carolina
Series title Water-Resources Investigations Report
Series number 88-4207
DOI 10.3133/wri884207
Year Published 1989
Language English
Publisher U.S. Geological Survey
Contributing office(s) South Atlantic Water Science Center
Description iii, 16 p.
Country United States
State North Carolina
City Marion
Other Geospatial Catawba River
Additional publication details