Field Notes
Precipitation and Landslide Occurrence
By Craig F. Erdman, LG, CEG, PG – Nov 10, 2016
Rain always brings an increased risk of landslides, but extremely high precipitation rates throughout the Pacific Northwest in October have geologists, engineers and owners of vulnerable infrastructure on alert for geologic hazards.October typically receives a lot of rainfall, but last month’s...

Fingers in the Dam: Managing Risk in a Crumbling Dam Network
By Lindsay Flangas, PE – May 31, 2016
The United States relies on a vast network of dams to power our homes, fill our tubs, and protect our communities from flooding. Many of these dams were built during the infrastructure boom of the ‘50s and ‘60s, or even earlier, and are now in desperate need of modernization or replacement. It’s...

Washout: Roads at Risk During Storm Events
By Jennifer E. Aguettant, PE – Mar 22, 2016
Culvert washouts occur when turbulent water forces its way around the edges of a culvert, potentially causing the collapse of the road above.Between March 8 and March 10, 2016 a large storm slowly made its way across North Louisiana. As this massive storm inched eastward, it dropped between 17 and...

Risky Air: The Threat of Chemical Vapor Intrusion
By Neil Morton – Mar 16, 2016
GeoEngineers' staff test for chemical vapors in the crawlspace of a home above a contaminated site.Soil and groundwater contaminated with volatile chemicals, such as fuels and cleaning solvents, can threaten the health of people in homes or other buildings above or near the contamination. Typical...

Sinkholes a Threat after Heavy Rains
By Gary Pendergrass, PE, RG – Jan 13, 2016
In the wake of recent rain events and flooding throughout Missouri, it’s important to think about the increased risk of sinkholes and other hazards following storms. Karst systems, which form within soluble rocks like limestone, are especially affected by sudden significant rainfall. If you live or...