Which of the following is a type of self-liquidating municipal utility?

A self-liquidating municipal utility is one that generates enough revenue to cover its expenses, including operational costs and any necessary repayments of debt. A Water Authority fits this definition because water service can be structured as a utility that charges users based on their consumption. The fees collected from residents and businesses for water usage are typically designed to cover the costs related to the procurement, treatment, and delivery of water, along with maintaining infrastructure.

This model allows the Water Authority to operate independently from the municipal budget, as it is funded through its own revenues, thus making it self-liquidating. Such authorities ensure that they can sustain their operations financially without needing ongoing subsidies from the municipality.

In contrast, other options, such as an Electric Authority and Transportation Authority, while they may also operate similarly, don't align as closely with the concept of self-liquidation through user fees on a specific utility like the Water Authority does. The Parks and Recreation Department often relies on municipal funding and may not generate sufficient revenue to cover all expenses, making it less of a self-liquidating entity compared to a Water Authority.