Smelter is a class III wave. I only really know the DGO/Farmington NM area w/rivers so... CO cup probably will make life hard on playboaters until the rodeo (2 pm saturday) because all of the slalom boaters are out there getting ready for their race but our locals are still out there playboating. there is a chance to use it today because there is a downriver race today starting @ smelter. According to the boaters down here from golden, the water moves faster. We have flows between 1000 cfs and 1500 cfs right now... yeah
You could probably do all you wanted on smelter right now
if your coming down through silverton - Once you hit DGO, go all the way through town to like Southwest white water/Buger King, there will be a really weird intersection, go right and get on Camino del Rio . After the light by Wells Fargo/Albertsons/Double Tree, keep going straight, you'll be able to see the waste water treatment plant (sadly, in the park) and at one point you'll be able to see everything up to smelter.
If coming through moab/cortez - once you hit the light by double tree, take a right and follow directions below
Both - At the next light by the park hang a right and go into the parking lot behind the train engine. once you're there, you can walk up. Smelter is just below the weird little anouncers stand and is the furthest wave up that you can get to w/o leaving the park. The waves below are also pretty good, the one after smelter, center wave, is harder to get into, but the one below there, Corner pocet is pretty good.
Hope this helps