Wikipedia has an informative writeup on this aqueduct:
Mathur Aqueduct or Mathur Hanging Trough, is an Aqueduct in Southern India, in Kanyakumari District of Tamilnadu state.
Mathur Aqueduct itself carries water of the Pattanamkal canal for irrigation over the Pahrali river, from one hill to another, for a distance of close to one kilometer. This Aqueduct is necessitated due to the undulating land terrain of the area, which is also adjacent to the hills of the Western Ghats.
Mathur Aqueduct is a concrete structure held up by 28 huge pillars, the maximum height of the pillars reaching 115 ft. The trough structure is 7 ft in height, with a width of 7.5 ft. The trough is partly covered on top with concrete slabs, allowing people to walk on the bridge and also see the water going through the trough. Some of the pillars are set in rocks of the Pahrali river, though some of the pillars are set in hills on either side.
As you descend down to the river, you can see rubber trees planted, with rubber sap extraction in process. It is a pity that I was not patient enough to snap a photo of a drop actually falling... There is not likely to be a next time any time soon I am afraid.
© 2009, Abhinav Agarwal. All rights reserved.