Flooding and erosive flows following a 2004 rainstorm caused this bridge collapse in El Paso County. East Sand Creek had been
Flooding and erosive flows following a 2004 rainstorm caused this bridge collapse in El Paso County. East Sand Creek had been "channelized" upstream of this structure - possibly concentrating the flows and resulting in this damage. Photo credit: Colorado Geological Survey.|Bank erosion (cut bank caving) along the North Fork of the Gunnison River in Paonia

Hazards, Water

Case study: Fluvial Hazard Zone

“The Fluvial Hazard Zone (FHZ) is defined as the area a stream has occupied in recent history, may occupy, or may physically influence as it stores and transports water, sediment, and debris.” The CGS often collaborates with local, state, and federal agencies on projects concerning emergency preparedness and community…

Check dams along drainage ditch
Check dams along drainage ditch

Hazards, Water

Case Study: stormwater

Stormwater runoff is excess water associated with a rain or snow storm event that flows over the land surface and is measurable in a downstream river, stream, ditch, gutter, or pipe. From a regulatory perspective, stormwater is managed through some sort of engineered conveyance and is focused…