Here is a photo taken on Saturday 5-16-15. It's hard to make out the measurements embedded in the concrete, but I marked the 608' mark with an arrow. My son, standing in the photo, is about 5' tall. So my best guesstimate is that the top of dam it around 613' or so?
The water level at this time was 598.12'. This was before they closed the road going down to the parking lot on the South side. If any one witnessed the cluster that had become, they will understand the decision to close it. That one lane road was a disaster. While we were there, at any given time there were 3 to 4 cars at the top and bottom vying for who could travel up or down the road! Saw a couple of stalemates, as one or the other had to back up or down the road...
Maybe they could post someone at the top and only let people with fishing equipment down there. It appeared that about 98% of the traffic was looking and taking photos, not fishing.
