Scoping a Job From Shore: What a Good Contractor Sees First

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

Marine Construction | Boat Lift Installation March 14, 2021. Port Aransas, Texas. A norther had blown through the night before, and the water was still coffee-colored and running high. The client, a retired charter captain named Ray, met me at the end of Oak Shore Drive. He pointed at his failing timber bulkhead—a thirty-foot section where the cap was gone and the piles were leaning seaward like a row of drunk sailors. I didn't say a word for about thirty seconds. I was reading the waterline, the mud, the way the tide was moving, and the two houses on either side of his lot. Ray said, 'Well? How bad is it?' I said, 'Ray, I can't tell you yet. But I can tell you what I'm looking at.' That morning, the water wasn't just murky—it was full of sand from the north wind. The beach slope had a sharp notch in front of his bulkhead, like a bite taken out of a sandwich. On the neighbor's lot, an old palmetto had exposed roots hanging over the edge. I'd seen that pattern before. The sand was washing out faster on Ray's side, and the water was giving me a story before I ever put a probe down.

The Water Itself

Color and clarity tell you more than any sonar readout. That day it was brown and opaque—a hard read. When it's clear, I look for grass, buried shell, or a dark line of low-oxygen mud. That tells me what the piles are going to drive into. But even murky water gives you a story: the way it moves, the trash line, the foam. A lot of suspended sand means the system is grinding down the coast. If I see black mud at the water's edge, I know the bottom is soft and the piles will have to go deeper. If I see shells, I'm thinking about pre-drilling or jetting. I'll get the real answer from a soil probe, but the water tells me where to start looking.

The Tide Clock

I check the tide chart before I get in the truck, but on site I look for the wet/dry line on existing piles or rocks. That clean, sharp line tells me the working window. High tide means barges can come in, but if it's a spring tide, I might only have a few hours of deck time before the mud flats shut me down. The number of hours of water coverage determines how much I can pre-drive before setting the template. On Ray's job, the wet/dry line was six inches above the boot-line on his old piles. That told me the tide range was moderate—maybe 2.5 feet—which meant I could work through most of the day but had to be careful about getting a loaded barge out on the low end. Timing is everything, and the tide clock is the one you never reset.

What's Already There and Falling Down

Every failed structure is a spec sheet written in decay. Ray's bulkhead had piles that were rotten at the mudline—I could see the taper where the crabs had been at them. The fasteners were galvanized, but the heads were rusted through, which told me the original builder used the wrong grade for marine exposure. That's a red flag. But more important, I saw what was built wrong originally. The bulkhead was tied back with a single line, no deadmen. That's why it gave out. The material failures are obvious—what you're looking for is the engineering mistake. When I see a bulkhead that failed the same way as its neighbor, I know the problem is systemic, not just old age. That means the replacement has to do something the original didn't, or I'll be back in ten years.

Where the Cranes Can Go

The first thing I do after looking at the water is turn around and count the width of the lot. Can a 90-ton crane get back there? Is there an overhead utility line? Is the ground soggy where the access mat has to go? On a pile job, the crane is the whole show. If you can't get the crane and the vibratory pile driver to the water's edge, you're adding two days of pipe staging or a crane barge. That will double the price. On Ray's lot, the ground was sandy and dry—easy access. But I saw the neighbor's fence was tight to his property line, and there was a power line running low right over the only approach. I knew I'd have to call the utility company and maybe rent a boom truck with a shorter stick. That's a cost and a schedule hit, and it gets baked in before I give a number.

The Neighbors Watching You

I always look at the properties on either side. If the neighbor has a riprap slope that's holding, that tells me the problem is isolated. If they've got a new seawall, I know the county has been pushing people to a certain spec, and I'd better match it. But that also tells me about logistics—where can I stockpile old piles, where's the laydown yard. And it tells me about the audience. Every neighbor is watching your first move. They're already on the phone asking if the noise will be constant, if the barge will block their view. On a five-day job, one neighbor can shut you down with a single call if you're not careful. So I count them, I wave to them, and I know their names before we start. It's not just manners. It's a means of production.

Frequently Asked Questions

How do you know if the bottom is soft just from looking from shore? You don't for sure—that's why you probe. But you can look for clues. If the water is muddy and shallow, and the shoreline shows a gentle slope with fine sand, it's probably soft. If you see shells, beachrock, or an old reef, it's likely firm. On a scoping visit, I'll take a long steel rod and push it into the bottom from a skiff if the water is shallow enough. That tells me a lot without paying for a soil boring. Do you always send a diver down before giving a quote? Not always. If the water is clear and the structure is simple, I can often see what I need from a boat or by wading the shoreline. But if it's a repair on an existing pile where I can't see the mudline or the condition of the pile below water, I'll budget in a quick dive survey. It's cheap insurance compared to finding out after the crane is on site that the pile is completely gone underneath. What's the biggest mistake a homeowner makes when scoping a job before hiring a contractor? Hiring someone who never looks at the water—just quotes from the back of the truck in the driveway. A good contractor has to read the site, check the tide, ask about access and neighbors. If they don't do that, they're either guessing or planning to lowball you and change order later. Take it from someone who's had to rescue more than one of those jobs.