Alderpoint RD PM 40.5 pending geotech report, repair slope failure with reinforced embankment, geogrid, permeable material blanket with underdrain, T

The Federal Highway Administration (FHWA) awarded a Project Grant of $189,100 to the California Department of Transportation (Caltrans) on July 17, 2025, under the Highway Planning and Construction program (CFDA 20.205) to repair a slope failure on Alderpoint Road at post mile 40.5 in California. The project deliverables include geotechnical assessment and analysis, slope stabilization using a reinforced embankment with geogrid reinforcement, installation of a permeable material blanket with underdrain system, construction of a trenched underdrain for drainage management, and replacement of the existing culvert and inlet riser.

This infrastructure improvement project addresses highway safety and pavement preservation objectives consistent with the Highway Planning and Construction program's mandate to support construction and improvement of highways and related transportation infrastructure. The work will stabilize the failed slope and enhance drainage infrastructure to prevent future failures and ensure the long-term integrity of the roadway.

Project description

Alderpoint RD PM 40.5 pending geotech report, repair slope failure with reinforced embankment, geogrid, permeable material blanket with underdrain, trenched underdrain, and replace culvert and inlet riser.