[BC] lpfm question

[bmc1956 at aol.com]

Thanks to all who offered information on us moving from 100 watts at 100' to 15 watts at 250'.

I have a couple of more questions to ask, if I may.

We are in Lake Charles, LA, flat land, 20 miles from the Gulf.? Tropospheric Ducting is a big problem here. 

Would transmitting from a higher HAAT with less wattage help with this problem?

Also, what signal db is required to penetrate houses, apartments, commerical buildings, and mobile homes?

Thanks
Barry McCall?? www.kelbradio.com