A more thorough explanation:

Definition: Boomage is a fee that a company charges for collecting and distributing logs that have accumulated in its boom. A boom is a line of sawed logs that are collected and stored on the surface of a stream.

Example: A logging company charges boomage to other companies that need to collect logs from their boom. For instance, if a paper mill needs logs to make paper, they will pay boomage to the logging company to collect the logs from their boom.

Explanation: The example illustrates how boomage works in the logging industry. The logging company charges a fee for collecting and distributing the logs that have accumulated in their boom. Other companies that need the logs will pay the boomage fee to the logging company to collect the logs from their boom. This helps the logging company to make money and the other companies to get the logs they need.