Power only dispatch, explained: pools, drop loads and the reload

Power only looks simple from the outside: you have a tractor, someone else has a trailer, you put them together and drive. In practice it is a system of trailer pools, drop yards, interchange agreements and timing. This guide walks through how that system works from the tractor's side, who is responsible for what, and how a dispatcher strings power only drop loads together into a week that pays. If you need the basic definition first, start with what power only is.

The life of a pool trailer

The easiest way to understand power only is to follow one trailer for a week. Tap through each step to see who is responsible for it and what to watch for.

That cycle is why power only works for both sides. The shipper keeps its trailers loaded ahead of time, so trucks don't wait at docks. The carrier skips the cost of owning a trailer and most of the dock time. What the carrier gives up is choice: you can only haul what the pools near you have ready.

Trailer pool loads vs regular freight

Power only freight comes in a few forms, and they plan differently:

• Trailer pool loads. Preloaded trailers that belong to a shipper or carrier program. The program approves you first, then offers loads.
• Broker power only. Brokers post loads as power only when the shipper or another carrier provides the trailer. You see them on boards and through broker contacts.
• Drop and hook at shipper yards. A shipper keeps a lot full of trailers and swaps them with each visit.
• Intermodal containers. Container and chassis moves to and from rail ramps and ports, under the UIIA, often with extra gate credentials.

Each one has its own approvals, its own yards and its own rules, which is what makes power only feel complicated. Listing which programs you are approved for, and where their yards are, is the first job a dispatcher does. Our power only trailer pools and drop yards directory covers the common setups.

How dispatch strings pool loads together

A single power only load is easy to find. A week of them, back to back, is the hard part. Here is the method we use.

1. Map the yards you can use

We start with the programs you are approved for and the yards they use near your home base. A yard that has trailers but sits 90 minutes from your lanes is worth less than a closer one with fewer.

2. Plan from drop to hook

The question after every delivery is: where is the nearest loaded trailer I can hook next? We look for the next load before the current one delivers, ideally at a yard close to the drop. Every empty mile between the drop and the next hook goes into the all-in rate of the next load.

3. Mix sources

Relying on one program leaves you stuck when it slows down. We combine pool loads, broker power only and drop and hook freight so a quiet program doesn't park your tractor.

4. Count the waiting

Drop loads usually mean less waiting, not none. Yard check-in, finding the trailer and paperwork take time, and some yards are slow. We note which yards run fast and plan around the slow ones.

Paperwork and insurance

Power only runs on paperwork that dry van carriers rarely see. Before your first hook, expect to have:

• A trailer interchange agreement with each program or equipment owner. It sets who is responsible for the trailer while you have it, how damage is handled and when it must be returned. Intermodal equipment uses the industry-standard UIIA. Read more in trailer interchange and dispatch.
• Trailer interchange or non-owned trailer coverage, at the limits each program requires, on top of your liability and cargo policies.
• Clean inspections and an ELD, since programs check your safety record before approving you.

At the hook itself, three habits protect you more than anything else: photograph every side of the trailer, check the seal number against the paperwork, and note any existing damage before you pull out. If it isn't written down at the yard, it is very hard to prove later.

Is power only right for your tractor?

Power only suits carriers who want to haul without a trailer payment, day cab owners who want regional work, and new carriers building a record. It suits you less if there are few pools near your home base, or if you want the freedom to take any van load you see.

The way to decide is with numbers: your lanes, the yards near you, what power only pays there compared with van freight, and what a trailer would cost you. Our power only dispatch page has a planner that compares the two side by side with your own inputs.