Yes, that helps a bunch. So the 6-7 feet of drop is over a 75 yard distance. If the culvert wasn't plugged the water would just go under your driveway. From that point it continues another 1000 feet to the far end of your property and it drops an unknown amount over that distance.
That sounds like a pretty decent situation for irrigation. If you can hold water at the high end of the property you have the potential for distributing it however you want.
As for electricity, I'm not a hydro expert unfortunately. Most small systems I've seen are for low flow but high head. If the unknown drop from the driveway to the far end of the property is significant (>40'?) you may have some micro hydro options. Personally I'd love to see a small water wheel next to the driveway churning away with a 6' wheel on it. I'm not sure if that would generate any electricity but it would look cool
