re rather graphic but if you go out to most of these reservoirs it looks nothing like the pictures," said Larsen. "We have fences around these things. We can't keep ducks out, of course, but there are precautions taken so that if e coli (bacteria) does get into the system, the chlorine is added as it leaves the reservoir to solve that potential threat." EID's water system, centered around Sly Park Reservoir, was built in the 1950s by the U.S. Bureau of Reclamation for drinking water and agricultural use. ...