Broom Colliery is shown as "Broom Pit (Disused)" on the first and second edition Ordnance Survey 25in mapping of 1889 and 1907, including tips, a shaft and an 'Old Engine House'. Re-constructed and re-opened in 1933, the mine enjoyed a brief renaissance, closing again in 1939; improvements inccluded a 600-yard electrically-hauled narrow-gauge tramway (nprn 400202) to carry coal to the Saunderfoot Railway (nprn 43052). Features extending to the Saundersfoot Railway c.400m to the southwest may be associated tips (nprn 400203).
Sources include: The Saundersfoot Railway, M R C Price, Oakwood Press, 3rd edition 1978.
J.Wiles, RCAHMW, 26.04.2004 & B.A.Malaws, RCAHMW, 17 March 2014.