Gross Dam is currently overflowing, leading to high/fast waters in South Boulder Creek. Rain storms and/or additional snow melt could make the water levels even higher. Fishermen, Bikers, Hikers and others near the water (primarily running through Walker Ranch) should respect this swift water, and stay clear.

http://forecast.weather.gov/showsigwx.php?warnzone=COZ039&warncounty=COC013&firewxzone=COZ239&local_place1=Boulder+CO&product1=Short+Term+Forecast#.VXC7SWBWLKc

FLOOD ADVISORY
NATIONAL WEATHER SERVICE DENVER CO
1251 PM MDT THU JUN 4 2015

...The Flood Advisory continues for the following rivers in Colorado...

  South Boulder Creek near Eldorado Springs affecting Boulder
  County.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Persons with interests along these rivers are urged to use caution.
Avoid flooded areas and stay clear of river banks that could become
unstable due to the high flows. Keep children away from fast
flowing streams.