Might be worth mentioning, there was pretty bad flooding in Colorado in September 2013 including in Jefferson County. I just noticed the landslides while looking at the area.
coloradonewsline.com
(this is around the White Ranch Park)

'Almost unimaginable': The 2013 Colorado flood, 10 years later • Colorado Newsline
On this anniversary of the 2013 Colorado flood, communities are reflecting on lessons of the flood and its story of resilience amid tragedy.
