Check with an appraiser in the Amarillo/Lubbock area. There's wind farms out there. There's talk of some down along the Gulf Coast, but none yet. I do know that there's a company just north of here that does part of the fabrication (powder coating, etc). These things require oversize permits to move just one prop. Long suckers.
The one in your area is, as I recall from the news, supposed to be off-shore somewhere. The key is the effect on the tourist views, etc. Possible damage to shellfish industry, fishing industry. However, oil platforms serve as artificial reefs, increasing fish, etc, so that's not a good argument.
Sounds like a very high-dollar appraisal. I'd charge per day on this one.