last time we were there they were running

We highly recommend the GYPSY Guided tour of the Hoover dam and drive from Las Vegas via Hoover Dam to the Grand Canyon. It entertains you with facts on the dam, where to park, where to view all for a $6 app on your smartphone. The "Gypsy" app tour is like having an expert tour guide that tells you where to turn, what to see and fills you in on history, geology and funny tid bits. It is the right amt of information and silence. definitly check it out when visiting Hoover Dam and get the history.

The Hoover dam is opposite the Grand Canyon direction

No you will not be able to see it

Best to check directly with them as things could have changed.

We live in Vegas so it is easy for us to take the 45-min drive from our home. After you leave the security checkpoint, watch for a small parking lot on the right with lots of stairs leading up to the bypass bridge. A long walk, but the view of the dam is spectacular. Return to the parking lot and drive down to the dam's on-site parking facility that is favorable if you have difficulty walking. I recommend you bypass the parking facility and drive across to the Arizona side where parking is free but hard to find. Then you take the pedestrian walkway back to the Nevada side and purchase your tickets at the Visitor Center. You can judge the walking distance, in 100-120 degree sunshine, and decide if you should drive back over to the Nevada side and park in the multi-level parking lot for $10. There is plenty to see outside of the Visitor Center. The guides inside the Visitor Center will describe the available tours. Take a wide brim hat, social mask, and plenty of water when you are walking outside. On your return trip, follow the signs from the dam to Boulder City for an ice cream cone and a glimpse of history in a charming small town. On the way back to Las Vegas, you can stop in Henderson for fast food or Walmart shopping.

I have seen discount tickets on groupon.

I honestly would say "no". They will not fully understand. Sorry. I mean even as an adult I was just amazed at it.

hello alishjan, re hover dam... first time out there? it was mine and let me tell ya, there really is not many choices on roads or scenery, lol. once you leave vegas heading toward Hoover Dam, not much except Boulder, which would have places to eat. We didn't stop but the little town did leave an impression as "quaint", think we passed a "train ride" passing thru and 1 grocery store. the scenery is everywhere, the expanse with nothing, the mountain tops looming near and far.... then suddenly you spot a lake (or is that a mirage?) and there it is.... Grand, man made and inspiring, the dam and the surrounding infrastructure show what extreme measures it took to harness nature, for better or worse as you will see by the visual water lines, +100's of feet above the current water level which our driver states is as much or perhaps even more a result of poor water management as any natural event. Be that as it may, seeing that line does give a dramatic perspective, especially in photos.