just wondering, is Hoover dam like a "secret" armory full of enclave tech or what?

we all know that if you pursue and bring McNamara the vegetation enhancer in veronica's companion quest, he says it will not get them Hoover Dam, but all i know is that the dam gives off electricity, and Helios does not have to power a weapon.

Is that a typo or what?

Well Helios one does a have "super power" Elijah wanted that power to thats why he stayed. The dam has nothing in it other than its use for electricity.

Brotherood arn't interested in the Dam. Enclave have nothing to do with the Dam.