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Bridge-Site Study Data for Selected Highway Crossings in Mississippi, 2023

June 18, 2024

The U.S. Geological Survey (USGS) works closely with the Mississippi Department of Transportation (MDOT) to provide information to be used by the MDOT for design of highway-drainage structures. MDOT spends millions of dollars annually for highway construction. Streamflow records, hydrologic analyses of basins, and hydraulic analyses of flooding potential at proposed highway crossings help the MDOT to make more informed decisions on the use of highway construction funding. Flood-frequency and hydraulic characteristics at highway crossings are determined from historical flood-elevation data recovered by the USGS, cross-section data, and correlations with data from nearby gaging stations. Additional streamflow data are collected for ungaged sites when substantial flooding occurs in an area of interest to MDOT. This information not only provides the basis for the design of highways and drainage structures, but is also used by local agencies and the public as a guide in flood-plain management. Data for twenty-eight sites in Mississippi that were studied during the State fiscal year 2023 (July 1, 2022, to June 30, 2023) are provided in this data release. The geospatial dataset includes one point feature class shapefile with associated FGDC-compliant metadata representing selected basin characteristics and estimates of eight flood-frequency peak streamflows with corresponding stages, or water-surface elevations for twenty-eight sites in Mississippi. Flood-frequency streamflows were determined using methods described by Anderson (2018). Water-surface elevations were determined using methods described by Rantz (1982a, 1982b). Also included are input files of the step-backwater model described by Shearman (1990).

Publication Year 2024
Title Bridge-Site Study Data for Selected Highway Crossings in Mississippi, 2023
DOI 10.5066/P13RCNQK
Authors John B Storm
Product Type Data Release
Record Source USGS Digital Object Identifier Catalog
USGS Organization Lower Mississippi-Gulf Water Science Center - Nashville, TN Office