After conducting research, it has been found that Gallagher Canyon SRA is a boat ramp located in Lincoln County, Nebraska. It is situated at latitude 40.73665237 and longitude -99.97304535. This boat ramp is managed by the Nebraska Game and Parks Commission.

Gallagher Canyon SRA is a concrete boat ramp that is open year-round, providing access to a 2,500-acre reservoir known as Lake Maloney. The boat ramp is approximately 4 lanes wide, allowing for multiple boats to launch or retrieve at the same time. It also features a courtesy dock for loading and unloading passengers and gear.

As for the types of watercraft that are permitted on Lake Maloney, it is stated on the Nebraska Game and Parks Commission website that powerboats, sailboats, kayaks, canoes, and paddleboards are all allowed on the water. However, there is a 5 mph speed limit for boats on the lake. Additionally, all boats must have current registration and adhere to all safety regulations set forth by the state of Nebraska.

In summary, Gallagher Canyon SRA is a concrete boat ramp located in Lincoln County, Nebraska that provides access to Lake Maloney. It is approximately 4 lanes wide and is open year-round. Powerboats, sailboats, kayaks, canoes, and paddleboards are all permitted on the lake, with a 5 mph speed limit in place.