73116 is as yet unamed.
This view is westwards (Up) from just south of Bridge 221, Corfe Mullen Bridge (carrying Brickyard Lane).

In the background is the coal powered Admiralty pumping station at Corfe Mullen. Served by sidings laid in 1915 by the S&DJR while the waterworks were being constructed in 1915-16, it provided water to the Royal Naval Cordite Factory at Holton Heath, some 8 miles away.