How to Sequence a Marina Repair So Slips Stay Rentable

By Ed Brannigan, Marine contractor. Reviewed by Amanda McCallister, editor.

Dock & Pier Repair | Pile Driving & Piling Repair October 2017, Marco Island. The water was the color of coffee, and the smell of dead mangroves hung on everything. Hurricane Irma had just gutted the marina's fuel dock and torn loose twenty-odd slips. The owner, a retired airline captain named Bob, stood next to me with a clipboard and a face like a kicked dog. His first question wasn't about repair costs. He asked, 'How fast can I get people back in these slips?' That's when I learned the difference between fixing a marina and keeping it making money. They're not the same job. That first winter I tried to do things the logical way: rebuild the fuel dock first because it was the biggest revenue line, then move to the slips. Bad call. We spent six weeks on the fuel dock while the whole south pile field sat closed. Bob's rent roll bled dry. By the time we got to the slips, the snowbirds had already booked elsewhere, and we lost a full season. The right way to sequence a marina repair is to think like a landlord, not an engineer. Every slip that's closed is a slip that's not generating rent. Every day the fuel dock is down is a day the bait shop loses customers. You don't just stack up the hardest job first. You stack up the job that gets paying boats back in the water fastest. Here's how I do it now.

Survey the Damage and Tag Every Slip

Before you write a single work order, put a boat in the water and walk every pile, finger, and cleat. Use a paint pen to mark each problem: 'L' for load-bearing, 'S' for cosmetic, 'C' for critical. No one does this on big commercial jobs because it costs a day. But a marina is not a seawall. You need to know exactly which slips are unusable, which are marginal, and which are fine. On that Marco Island job, we found six slips that looked fine from the launch ramp but had cracked pile caps that would fail the first time a 40-foot sportfisher tied up. Those slipped become 'rentable' only after a quick cap repair. If we'd surveyed first, we would have saved Bob two months of lost rent on those six slips.

Phase by Slip Type, Not by System

Contractors look at electrical, water, and pile systems. Renters look at location, depth, and shelter. Sequence the work by slip type: first fix the deep-water slips that hold the big boats, then the T-head slips that are easiest to get in and out, then the lower-value finger slips. On one job in St. Augustine, the client wanted to replace all the electrical pedestals at once because it was cheaper. I told him no. We re-powered the short row of eight 50-amp slips first, while the rest of the marina stayed on old 30-amp service. Those eight slips rented out two weeks later at a premium, and the new electrical paid for itself before we even touched the next row. If you close a whole section to save on mobilization, you're giving up a month's rent to save a few hundred bucks in crew moving costs.

Use the Weather Window and Know Your Season

Every marina has a season. In the Gulf, it's October through April for snowbirds, and summer for locals. On the Atlantic side, you've got north-bound traffic in spring and south-bound in fall. You have to schedule the big disruptive work — like pile driving and deck demolition — for the shoulder months when slips are empty anyway. On a job in Savannah, we did all the underwater pile splicing in August because the transient slips sat empty during the heat. The locals didn't mind the hammer barge noise because their air conditioners ran over it. By October, we had 12 rebuilt slips ready for the fall migration. If you try to do that work in January, you're paying overtime and losing rent. Know the tide too. Pile driving on a negative low tide is a gift. It saves you from having a diver under every cut.

Stage Everything Before You Knock Anything Down

This is the one I still screw up on sometimes. You can't just show up with a barge and a crane. You need the replacement pilings delivered to the dock, the new deck panels pre-fabricated off-site, the fasteners sorted and labeled, and the electrical conduit pre-run in sections. If you stage right, you can tear out ten slips and rebuild them in three days. If you don't, you tear out the slips on Monday and then wait until Thursday for the pile truck to show up. Every day of waiting is a day the slip is closed. On that Marco Island job, we lost a full week because the pre-cast pile caps went to the wrong yard in Homestead. That was a lesson in logistics. Now I get delivery confirmations in writing, and I store materials on the site before I take a single free pile out of the ground.

Never Close the Whole Marina at Once

I've seen contractors come in and say, 'We need to close all 150 slips for a month to get this done safely.' That's garbage. You can work around an active marina if you use the right equipment. Use a barge-mounted crane instead of a tracked excavator on the deck. Set up temporary walkways and safety zones so boaters can still walk their dogs and carry groceries. And when you absolutely have to close a section, do it in the middle of the week, not a Friday afternoon. We know from experience that Friday is when the boats come out. If you're going to shut down a fuel dock, do it on a Tuesday morning. Bob's clients had a good laugh at me for that one, but the first Tuesday shutdown went so smooth, he asked if we could do the next one on a Monday too. You can't make everyone happy, but you can make most of them happy enough to renew their annual lease.

Frequently Asked Questions

Can I keep my boat in the slip while repairs are happening? Depends on the work. If we're only replacing a pile cap or an electrical pedestal, you might be able to stay tied up with a crew working around you. But if we're driving new piles within ten feet of your hull, the vibration and underwater noise can scare fish but not damage your boat — the bigger risk is falling debris. We'll usually tell you to move to a temporary slip if we have one open. That's part of the sequencing we plan out. How long will the repair take from start to finish? For a typical marina with 100 slips, you're looking at four to six months of total work if you phase it right. But that doesn't mean all slips are closed the whole time. The key is to keep at least half open continuously. If a contractor tells you it'll take a year, they're probably planning to close everything at once. Ask them how they plan to phase it. Is it cheaper to do all repairs in one big batch? On paper, yes. One mobilization, one crew, one crane. But when you count lost rent, it's usually more expensive. Spreading the work over three seasons might add 10-15% to the labor cost. It also saves you 30-50% of your annual revenue. I've seen a marina lose more in one month of full closure than they saved on a bid. Always calculate the rent loss into your decision.