The Twin Springs river gauge has been providing valuable information since 1911. This one is located deep in a forest landscape next to a narrow dirt road.
credit:
Aaron Kunz
Dave Evetts with USGS is one of several people who check on the gauges every 6-weeks. But today they are equipped with satellite technology that allows hourly data to be collected and viewable on the web.
credit:
Aaron Kunz
Greg Clark of USGS talks about the history of river gauges as colleague Tim Merrick looks on. Even though monitoring is automated, employees still take measurements by hand every 6-weeks. Sometimes during uncomfortable conditions.
credit:
Aaron Kunz
Twin Springs was installed in 1911. It was constructed to monitor water flow for the soon to be constructed Arrowrock Dam.