Insured 20+ years across Texas, Illinois & Indiana USACE/permits handled
Last Updated: June 2026 — current crib dock materials and pricing.
Dock Types Guide
A crib dock stands on rock-filled timber boxes — cribs — that rest on the lakebed and hold the dock in place by sheer weight, with no driven pilings at all. That makes it the answer for rocky, hardpan, or boulder bottoms where piles can't be driven, and one of the most permanent, immovable docks you can own on a stable-level lake. It's also the most expensive dock we build, starting around $100 per square foot of deck area. We build, replace, and repair crib docks on freshwater lakes across Texas, Illinois, and Indiana — from our Houston base (base #1, Houston + 120 miles) and our Chicago base serving all of Illinois and Indiana.
Best for: rocky / hard-bottom freshwater lakes where piles can't be driven.
Lifespan: 30–40+ years — the rock-filled cribs are extremely stable.
Type: fixed (gravity crib on the bed) — the most permanent, immovable dock.
Rock-filled crib docks for rocky and hard-bottom freshwater lakes — the most permanent dock where pilings can't be driven.
A crib dock is a gravity structure. We build open timber cribs — boxes of heavy treated logs or timbers — and set them on the lakebed where the dock bents would normally be. Each crib is then filled with rock or stone, and the combined weight pins it to the bottom so it can't shift, float, or heave. Framing spans from crib to crib, decking finishes the top, and mooring hardware turns it into a slip. Nothing is driven into the bed, which is exactly why the crib works where piles fail: on rock, hardpan, or boulder bottoms the rock-filled box simply sits and stays. The result is about as solid and permanent as a residential dock gets.
A crib dock is the right answer in one specific situation: a hard or rocky bottom that won't take a driven pile, on a lake whose level stays reasonably stable. It rewards you with unmatched permanence and rigidity. The downsides are cost and footprint — it's the priciest dock we build and it places rock fill on the bed, which draws closer permitting. If your bottom is soft enough to drive piles, a wood piling dock costs a fraction as much; if levels swing or ice is a problem, a floating or lift-up dock is the better fit. Compare every option on our dock & boathouse hub.
Per square foot of deck, a standard crib dock is built from the following components:
| Component | Typical spec | Role |
|---|---|---|
| Timber crib | Heavy treated logs/timbers, open box | Gravity foundation set on the lakebed |
| Rock fill | Clean stone / riprap, tons per crib | Weight that pins the crib to the bottom |
| Framing | 2×10 / 2×12 treated, crib to crib | Carries the deck between cribs |
| Decking | 5/4×6 or 2×6 treated (or composite) | Walking and boarding surface |
| Mooring hardware | Cleats, bumpers, ladder | Berths the boat and protects the hull |
Our crews follow a methodical, heavy-equipment sequence so the cribs seat true and the dock stands for decades:
Crib docks take longer than most types — figure a couple of weeks to several weeks on site once permitting clears, given the barge or crane work.
A crib dock lasts 30–40+ years, with the rock-filled cribs outlasting everything above them. Maintenance focuses on the parts you can see and touch: re-seal or replace decking, keep mooring hardware tight, and watch the crib timbers at the waterline for rot. Every few years it's worth checking that the cribs haven't settled unevenly and topping up rock if any has shifted. Below the waterline, the gravity foundation essentially takes care of itself.
On crib-dock inspections, the warning signs are mostly above the water:
Most of this is a targeted repair — replace crib timbers, top up rock, re-level the framing, re-deck — rather than a rebuild, because the cribs themselves so rarely fail. For sites where the real issue is water level or ice rather than the bottom, compare a floating or aluminum pipe dock.
Crib docks run about $100 per square foot of deck area (labor and materials) — the highest of any dock type, because each crib is fabricated, positioned with a barge or crane, and filled with tons of rock. The shore approach is priced separately at about $175 per linear foot. The premium buys a dock that is effectively immovable and lasts decades on a bottom that won't take piles. Water depth, the number and size of cribs, rock haul distance, and access drive the final number. Demolition of an old structure is a separate line item.
For a full breakdown by lake and dock size, see a local cost guide or run the numbers yourself:
Every crib dock follows the same disciplined sequence: bottom survey and design, crib fabrication, positioning, rock fill, then framing, decking, and the shore approach. Because a crib places fill in the water and occupies a footprint on the bed, it almost always requires a thorough review — federal review (USACE Section 10 / Section 404) plus state and local approval, such as TCEQ/GLO in Texas, the IDNR Office of Water Resources in Illinois, and the Indiana DNR — and some jurisdictions limit new crib construction. We assess the rules for your water body and handle the permitting and agency coordination before any rock goes in.
Crib docks are a freshwater, hard-bottom solution, classic on rocky northern lakes. We run two regional bases so crews stay close to the job and to the permitting authorities that review it:
Where the bottom will take a pile, a wood piling dock is far more economical; where levels swing, a floating dock serves better.
Common questions we answer for lakefront owners — what a crib dock is, lifespan, cost per square foot, when to choose crib over piling, lakebed and permitting, repairs, and build time.
A crib dock is a fixed dock built on a "crib" — an open timber box that sits on the lakebed and is filled with rock or stone. The weight of the rock holds the crib in place by gravity, so no pilings are driven. The deck is framed across the tops of the cribs. It's the go-to dock for rocky or hard bottoms where piles simply can't be driven.
A well-built crib dock is one of the longest-lived docks there is — the rock-filled cribs are extremely stable and can last 30–40+ years, with the timber framing and decking above the water refreshed sooner. Because the structure rests on the bed by its own weight, it shrugs off the loads that loosen driven piles.
Crib docks run about $100 per square foot of deck area installed — the most expensive dock type we build, because each crib is fabricated, floated or craned into position, and filled with tons of rock. The shore approach is priced separately at about $175 per linear foot. The payoff is a rock-solid, decades-long dock on a bottom that won't take piles.
Choose a crib dock when the lakebed is rock, hardpan, or boulders and you can't drive pilings, or when you want the most permanent, immovable dock possible on a stable-level lake. If the bottom is soft enough to drive piles, a wood piling dock is far cheaper; if water levels swing, a floating dock serves better.
Because a crib dock occupies a real footprint on the bed and places fill (rock) in the water, it often draws closer regulatory review than a piling dock, and some jurisdictions restrict new crib construction. We assess the rules for your water body up front and handle the USACE and state/local permitting before any rock goes in.
Yes. The timber framing and decking above the water are repaired or replaced like any dock. The cribs themselves rarely fail, but if one settles or a corner timber rots at the waterline, we can top up the rock fill, replace failed crib timbers, or re-level the framing without rebuilding the whole dock.
Crib docks are primarily a freshwater, rocky-lake solution — common on northern glacial lakes. In saltwater the submerged timber is attacked by marine borers, and most coastal sites are better served by a concrete- or steel-piled structure. We build cribs on freshwater lakes with hard bottoms.
Crib docks take longer than most dock types — fabricating the cribs, positioning them, and filling them with rock is heavy, methodical work that often needs a barge or crane. Figure a couple of weeks to several weeks on site once permitted, plus the permitting time that comes before mobilization.
Yes, and usually a thorough one. Placing rock-filled cribs in the water is regulated as fill plus structure, triggering federal review (USACE Section 10 / 404) and state and local approval. We manage the permitting and agency coordination for you.
Whether it's a rocky-bottom lake within 120 miles of Houston, an inland Illinois lake, or a northern Indiana glacial-lake shoreline, contact Shore Protect Construction for a site evaluation and a clear, itemized crib dock estimate.
At Shore Protect Construction, we take pride in our recent projects, where we've built and renovated bulkheads, seawalls, piers, docks, and boardwalks. Our latest work includes custom-designed waterfront structures that blend durability with aesthetics, protecting properties from erosion while enhancing their value. Whether it's a brand-new installation or a complete renovation, our team delivers top-notch craftsmanship tailored to your shoreline needs.
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