What a Legacy Biomass Plant Is Actually Worth

A legacy biomass plant usually shows up in a data room as a tired merchant generator. The energy margin is thin and the fuel bill is exposed. Enviva, the largest wood-pellet supplier in the country, filed for Chapter 11 in March 2024, a reminder of the counterparty risk in biomass fuel supply chains. So buyers price these plants on the power they sell, and the number comes out small.

That number may capture only one layer of the asset's value.

The scarce asset is the energized site, and its limits

An operating biomass plant is connected. It may hold a generation interconnection with export rights, a switchyard and substation, market qualifications, and transmission proximity that a new project would have to reproduce. Few new projects have that combination. At the end of 2025 roughly 2,061 GW of generation and storage were waiting to connect to the US grid, and Lawrence Berkeley National Laboratory found recent completions took a median of more than four years from request to operation. Most proposed capacity is never built: of the capacity requesting interconnection from 2000 through 2020, only 13 percent had reached commercial operation by the end of 2025, and 75 percent had withdrawn.

So that export right is genuinely scarce and has value of its own. Where unused capacity exists, storage or new generation may qualify for an expedited Surplus Interconnection Service process to inject, subject to studies and the existing limit. But an injection right is not a withdrawal right, and the existing interconnection does not by itself make the site data-center ready.

The site is worth more than the boiler

Strip out the generation and the site is still an industrial parcel that took years to permit. Many operating biomass sites carry some mix of industrial land, water access, air permits, cooling, fuel handling, and rail or road access. Rebuilding that on a greenfield can take years and is sometimes blocked. For a buyer who needs a site with power and water already attached, the boiler may be only part of the value.

The options, and what co-location really requires

Repowering is the clean option. Add or replace generation and the site is still injecting power, so its existing interconnection is directly on point, subject to re-study if the injection profile changes.

Storage is more tractable than a data center, but not purely export-side. A battery discharges through the injection right the plant has, then charges by withdrawing, which is the same import-side question a data center raises. The difference is degree: charging can be held to the existing limit, curtailed, timed off-peak, or fed from the co-located generator, so it is a smaller and more flexible ask. It still has to be studied.

The data-center option is different again. A biomass site is not data-center ready just because it has a generator interconnection. The generator was studied to inject power, and a data center must be studied and served as load. What the site offers is existing generation for some onsite load, electrical infrastructure, and transmission proximity. A workable strategy still turns on load-service rights, import capability, backup for when the plant trips, network upgrades, and who pays. Connections for large projects in parts of Northern Virginia have been quoted at up to seven years, so a site that shortens part of that path is worth studying. The value is a head start, not a finished import right.

The regulation is unsettled, which is both the risk and the upside

How much co-location value a buyer can capture is being decided now, and it turns on exactly that load-service question. In November 2024 FERC rejected an amended PJM agreement that would have raised co-located load at Talen's Susquehanna nuclear plant from 300 to 480 MW, leaving open questions of transmission service, reliability, capacity obligations, and cost allocation. That fight is about co-located load, not generation, and its outcome sets how much of a biomass site's co-location potential is real. Until it settles, price the range, not the top.

The framework

Value the asset in layers, not as a single cash flow. The operating economics set the base case, discounted for fuel risk, and a plant with heavy maintenance, environmental, or fuel liabilities may not even clear zero. On top sit the generator interconnection, the reusable industrial site, and the large-load development potential, the last subject to a separate load-service assessment and hair-cut for the regulatory range. On the right site that upside may be the larger share of value.

This is a screen, not a blanket thesis. The electric power sector holds only about 5 GW of biomass across a few hundred mostly small plants, and many sit at the wrong voltage or too far from load. For those the plant is the whole story. The work is finding the minority where it is not.

Update, July 2026

Berkeley Lab's latest data shows approximately 2,061 GW remaining in US interconnection queues at year-end 2025. FERC also directed the six regional grid operators under its jurisdiction to justify or reform their treatment of large loads, co-location, and behind-the-meter generation. These developments reinforce the need to distinguish generator export rights from large-load import service.

Methodology and the public data that runs it

Every input here is public. Plant location, capacity, interconnection voltage, and capacity factor come from EIA Forms 860 and 923. Queue and withdrawal data come from Lawrence Berkeley National Laboratory's Queued Up reports. Generation-interconnection value is benchmarked against ISO auction results, such as PJM's Base Residual Auction, and each ISO's public queue. Large-load import capability, upgrade cost, and co-location terms are a separate question, assessed from ISO large-load studies and FERC filings, including the Susquehanna docket (ER24-2172). Site attributes sit in county land and GIS records, air permits in EPA's ECHO database, and the Enviva Chapter 11 in the Eastern District of Virginia bankruptcy court.

All data compiled by Tafel Power from public sources, informed by the firm's transaction advisory work in ERCOT and cross-ISO markets.