To answer your last question, yes they can take up to 120 days. But if you will check the deadline it is the 11th of April. Those permits that are considered contriversial take longer. The deadline has been set for SFRX and it was the short timeframe as the concerns were negligable.
Here's the contact info for the Lantana site permit
QUESTIONS concerning this application should be directed to the project manager, Melody White, in writing at the Palm Beach Gardens Permits Section, 4400 PGA Boulevard, Suite 500, Palm Beach Gardens, Florid 33410, by electronic mail at Melody.J.White@usace.army.mil, by fax at (561) 626-6971, or by telephone at (561) 472-3508.