I'm sure you've looked at:
http://www.offshoreblue.com/cruising/okeechobee-bridges.php
One of the biggest hurdles for sailboats using the Okeechobee Waterway is the Port Mayaca RR Bridges’ 49’± vertical clearance. Unfortunately, with this portion of the waterway being non-tidal that means there is no waiting for low water to squeeze a possible few extra feet under the bridge.
However, lower water levels may often present an opportunity! Any time that the St. Lucie Canal is below its normal pool level of 14.5’; the result will be an equal increase in vertical clearances at all affected bridges.
Okeechobee Limbo
Still not enough? If your MHH is still a little too much to make it under the bridge, all is not lost. Bring in the "Okeechobee Limbo." Simply put, a crew out of the Indiantown Marina will meet your boat at the bridge and by use of plastic 50 gallon drums lined up along your rail and filled with water, list your vessel enough to pass under the Port Mayaca RR Bridge. Once through, the drums are emptied and removed from your boat and you are on your way. The whole process generally takes less than an hour.
While this method will not work on some broad beamed vessels, the majority of sailboats can benefit with a MHH reduction of up to 5 or 6 feet. With every boat having their own characteristics, results differ. For more information or reservations, contact the Indiantown Marina to discuss your requirements.
https://www.sailmagazine.com/cruising/a-boat-delivery-via-the-okeechobee-waterway
