Prince of Wales Engine House at Phoenix United Mine

The Prince of Wales Engine House is part of the Phoenix United Mine, built in 1910. It is constructed of granite rubble with red brick dressings.

The engine house is rectangular with a chimney attached to its south-west corner. It stands on a plinth and has a gable end facing forward. The chimney has a square base, rising to the same height as the engine house and topped with a circular, tapered brick chimney with a cornice. The front gable has a wide round brick arch at ground floor, with two narrower round-arched brick openings above. The right side has two round-arched openings at ground floor, one at first and second floors. The lower ground level features a round-arched opening. The left side has a round-arched opening at first floor, and an oculus at second floor. The rear has a round-arched bob opening that leads to a trench at a right angle to the engine house.

Attached to the left side of the engine house is a rectangular building with an arcade of three round brick arches to the front, two of which are blind, with smaller arches within the larger ones; the central arch is open. Approximately 10 metres from the rear left is another single-storey rectangular building with gable ends, and three round-arched brick openings to the side. One gable end has a bob opening flanked by round arches and an oculus at the apex. The other gable end features a round-arched doorway on either side. Remains of two further single-storey buildings, also with gable ends and round-arched openings, are attached to the side of this building.

A further two-storey building, 50 metres from the rear, likely housed the six head of pneumatic stamps and has a gable end with seven segmental-headed window openings on the front and three similar openings in the gable end to the right. It contains a housing for an engine at the left end and full-height openings to the front and rear at the same end.

In 1910, a new 80-inch pumping engine was installed, manufactured by Eolman Brothers Ltd of Camborne. The mine also included a Robey two-speed horizontal winding engine and a six-head pneumatic stamp mill. Drainage difficulties led to the work being abandoned in 1914.