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Bridge-Site Study Data for Selected Highway Crossings in Mississippi, 2021

Metadata Updated: October 28, 2023

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 also is used by local agencies and the public as a guide in flood-plain management. Data for eleven sites in Mississippi that were studied during the State fiscal year 2021 (July 1, 2020, to June 30, 2021) 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 eleven 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). Anderson, B.T., 2018, Flood frequency of rural streams in Mississippi, 2013: U.S. Geological Survey Scientific Investigations Report 2018–5148, 12 p., [Also available at]. Rantz, S.E., and others, 1982a, Measurement and Computation of Streamflow--vol.1, Measurement of Stage and Discharge: U.S. Geological Survey Water-Supply Paper 2175, p. 1-284, [Also available at]. Rantz, S.E., and others, 1982b, Measurement and Computation of Streamflow--vol.2, Computation of Discharge: U.S. Geological Survey Water-Supply Paper 2175, p. 285-631, [Also available at:]. Shearman, J.O., 1990, User’s manual for WSPRO—A computer model for water-surface profile computations: U.S. Department of Transportation Publication No. FHWA–IP–89–027, Hydraulic Computer Programs HY–7, 177 p. [Also available at:].

Access & Use Information

Public: This dataset is intended for public access and use. License: No license information was provided. If this work was prepared by an officer or employee of the United States government as part of that person's official duties it is considered a U.S. Government Work.

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Metadata Created Date June 1, 2023
Metadata Updated Date October 28, 2023

Metadata Source

Harvested from DOI EDI

Additional Metadata

Resource Type Dataset
Metadata Created Date June 1, 2023
Metadata Updated Date October 28, 2023
Publisher U.S. Geological Survey
Identifier USGS:61d5c8bdd34ed79293ffa3a1
Data Last Modified 20220802
Category geospatial
Public Access Level public
Bureau Code 010:12
Metadata Context
Metadata Catalog ID
Schema Version
Catalog Describedby
Harvest Object Id 8329963b-ba26-4dcd-8ae9-68229432817c
Harvest Source Id 52bfcc16-6e15-478f-809a-b1bc76f1aeda
Harvest Source Title DOI EDI
Metadata Type geospatial
Old Spatial -91.7373,30.139,-88.0958,35.0055
Publisher Hierarchy White House > U.S. Department of the Interior > U.S. Geological Survey
Source Datajson Identifier True
Source Hash fab7b26bc6c89923be8727cc0e70a7c81ebde89eefd472a6d114095584e67ded
Source Schema Version 1.1
Spatial {"type": "Polygon", "coordinates": -91.7373, 30.139, -91.7373, 35.0055, -88.0958, 35.0055, -88.0958, 30.139, -91.7373, 30.139}

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