Archive

FHWA NHI Bridge Training

Ayres develops and presents Federal Highway Administration (FHWA) National Highway Institute (NHI) training courses to state departments of transportation and other bridge owners nationwide. Ayres’ fourth indefinite delivery indefinite quantity (IDIQ) contract is the latest in a total of 22 years of teaching hundreds of courses. Ayres is also responsible for developing many of the… Read More »

Hastings Bridge Hydraulic Design

As part of the design-build team for this project, Ayres provided hydraulic and scour analysis in support of this design-build project to replace the US 61 bridge over the Mississippi River in Hastings, Minnesota. The project involved detailed floodplain hydraulics using HEC-RAS, bridge scour analysis, and scour countermeasure design. An important aspect of the hydraulic… Read More »

Atlanta Emergency Inspections

In September 2009, rain started falling in the Atlanta area and didn’t stop for days, far exceeding the 100-year flood mark. Many area bridges and drainage structures were damaged by the flooding. Damage included large amounts of debris, scour and erosion, structural damage due to impact, and actual failure caused by water velocity. The City… Read More »