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These data are high-resolution bathymetry (riverbed elevation) and depth-averaged velocities in ASCII format, generated from hydrographic and velocimetric surveys near highway bridge structures over the Missouri River in Kansas City, Missouri, in August 2019, as well as special surveys at two of the sites in August and October 2020 before and after installation of scour countermeasures. Hydrographic data were collected using a high-resolution multibeam echosounder mapping system (MBMS), which consists of a multibeam echosounder (MBES) and an inertial navigation system (INS) mounted on a marine survey vessel. Data were collected as the vessel traversed the river along planned survey lines distributed throughout...
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Scouring of streambed material surrounding bridge structures is a leading cause of bridge failure in the United States. Damages resulting from bridge failure oftentimes lead to financial burdens and loss of life. To date, there has been no comprehensive evaluation of the current (2016) effectiveness of the guidance or overall long-term performance of bridge-scour countermeasures provided in the Federal Highway Administration, Hydraulic Engineering Circular No. 23, Bridge Scour and Stream Instability Countermeasures. To that end, the U.S. Geological Survey, in cooperation with the Federal Highway Administration, obtained bathymetric, topographical, and other data at 20 of the surveyed sites across the United States...
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Scouring of streambed material surrounding bridge structures is a leading cause of bridge failure in the United States. Damages resulting from bridge failure oftentimes lead to financial burdens and loss of life. To date, there has been no comprehensive evaluation of the current (2016) effectiveness of the guidance or overall long-term performance of bridge-scour countermeasures provided in the Federal Highway Administration, Hydraulic Engineering Circular No. 23, Bridge Scour and Stream Instability Countermeasures. To that end, the U.S. Geological Survey, in cooperation with the Federal Highway Administration, obtained bathymetric, topographical, and other data at 14 of the surveyed sites across the United States...
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The US Fish and Wildlife Service has been petitioned to list the regal fritillary butterfly under the Endangered Species Act (ESA) with decision due in FY 2022. Population and species viability are directly related to genetic diversity, yet direct measures of genetic diversity are rare for any species, let alone a species of conservation concern. Previous research revealed regal fritillary populations show a reduction in genetic diversity from west to east, as potential habitat patches become smaller and more isolated. Genetic information will inform the species status assessment and the 12-month finding for this species.PI: Sara Oyler-McCance, sara_oyler-mccance@usgs.govPI/Funding recipients organization: US Geological...
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Sicklefin and sturgeon chub in Missouri and Mississippi Rivers were petitioned and Species Status Assessments (SSA) are due by 2023. This project will characterize population structure using tissue samples collected and genetically analyzed to assess trend of populations throughout their range.Objectives are: 1) Describe population structuring (degree of genetic isolation or mixing) taken from species range 2) describe Effective Population Size (Ne) 3) Describe population trends. Samples provided by participating state wildlife agencies and federal agencies. Cost of sampling is subsidized by ongoing Missouri and Mississippi sampling.PI: Dr Ed Heist Edheist@siu.eduPI/Funding recipients organization: Southern Illinois...


    map background search result map search result map Geospatial Data for Bridge Scour Countermeasure Assessments at Select Bridges in the United States, 2014–16 Geospatial Data for Bridge Scour Countermeasure Assessments at Select Bridges in the United States, 2016–18 Sicklefin and Sturgeon Chub Population Genetics Study for SSAs Genetic sampling to expand the phylogeographic analysis for understanding the genetic diversity at continental and regional scales for the regal fritillary butterfly, a species petitioned for listing under the ESA Bathymetry and Velocity Data from Surveys at Highway Bridges crossing the Missouri River in Kansas City, Missouri, in August 2019, August 2020, and October 2020 Genetic sampling to expand the phylogeographic analysis for understanding the genetic diversity at continental and regional scales for the regal fritillary butterfly, a species petitioned for listing under the ESA Sicklefin and Sturgeon Chub Population Genetics Study for SSAs Geospatial Data for Bridge Scour Countermeasure Assessments at Select Bridges in the United States, 2014–16 Geospatial Data for Bridge Scour Countermeasure Assessments at Select Bridges in the United States, 2016–18