Bridge-Site Study Data for Selected Highway Crossings in Mississippi, 2020

Dates

Start Date: 2019-07-01
End Date: 2020-06-30
Publication Date: 2022-02-22

Citation

Storm, J.B., and Baldwin, W.T., 2022, Bridge-Site Study Data for Selected Highway Crossings in Mississippi, 2020: U.S. Geological Survey data release, https://doi.org/10.5066/P9CA4O8I.

Summary

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 [...]

Summary

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 five sites in Mississippi that were studied during the State fiscal year 2020 (July 1, 2019, to June 30, 2020) 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 five 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 https://doi.org/10.3133/sir20185148].

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 https://doi.org/10.3133/wsp2175].

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: https://doi.org/10.3133/wsp2175].

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: https://water.usgs.gov/software/WSPRO/].

Contacts

Point of Contact :: William T Baldwin
Process Contact :: William T Baldwin
Originator :: John B Storm, William T Baldwin
Metadata Contact :: John B Storm
Publisher :: U.S. Geological Survey
Data Owner :: Lower Mississippi-Gulf Water Science Center
Distributor :: U.S. Geological Survey - ScienceBase
SDC Data Owner :: Lower Mississippi-Gulf Water Science Center
USGS Mission Area :: Water Resources

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MDOT_Bridge-Sites_WY2020.xml Original FGDC Metadata	View	39.9 KB	application/fgdc+xml
WSPRO_2020.zip		15.69 KB	application/zip
WSPRO_Readme.txt		1.71 KB	text/plain
MDOT_Bridge-Sites_2020.csv		1.4 KB	text/csv
MDOT_Bridge-Sites_2020.shp.zip		9.9 KB	application/zip

Purpose

The purpose of this data release is to present selected basin characteristics and estimates of eight flood-frequency peak streamflows with corresponding water-surface elevations for exceedance probabilities of 50, 20, 10, 4, 2, 1, 0.5, and 0.2 percent that correspond to recurrence intervals of 2, 5, 10, 25, 50, 100, 200, and 500 years, respectively, for five sites in Mississippi that were studied during the State fiscal year (July 1, 2019, to June 30, 2020). Bridge-site studies are funded by a cooperative program with the Mississippi Department of Transportation.

Bridge-Site Study Data for Selected Highway Crossings in Mississippi, 2020

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