You might get 1% of the water on target, probably less.

The slightest breeze would send the entire stream of target by 10s if bit hundreds of yards. Air resistance at the boundary of the stream would create turbulence the surface, extracting droplets from the edge of the flow the whole way. The amount of energy required to accelerate water (which is heavy) to those speeds would be stupendous. Just build a pipe that goes around or over the mountain.

Wind would blow that shit for miles. Could you in theory do something like this? Probably... Is it at all practical or beneficial? Probably not...

Fuck off, the Arch is our thing.

Water moving at 400mph? Over 1 mile? Seems highly unlikely. Even with no winds, the stream would degrade far too much to be anywhere near practical.

No. The system is unchanged, the amount of water the system has is the same. Welcome to grade 4.

I recall water displays in the local malls and at the zoo. The water would shoot out of little holes in the floor and arc over the concourse to a receptacle on the other side.

The reason the blast of water held its form as it shot across was due to an additive to the water. I think it may have been oil-based.

I haven't been to a mall in forever - because niggers. Not sure if there even are any malls still up in the cities - because niggers.

I suppose the water launched over the mile distance could have an additive that helps the blast to maintain its composure. The water could then have the additive removed prior to its intended usage.