Jutting out from the bluff and into a sort of bay/lagoon is a corrogated metal pipe ~7' in diameter. It is quite easy to access and all the times I have visited, it has little waterflow as is typical of bluff drains. Further back into the metal pipe there is a concrete wall with an arched passageway in further, extending into this passageway is two cables, which mount onto the corrogated pipe and on the other end in the concrete passage. The passage appears to be constructed of concrete sections, each made up of three seperate parts, being the arch and the two walls, the floor appears to be seperate and not sectioned. The passage is short and teminates in a pool style basin, made up of end facing bricks, with an arched cut out connecting it to the passage. Fig 1. Inner opening shape. ___ __/ \__ _/ \_ / \ / \ | | / \ | | | | \ / | | | | \ / | | | | | | \______________/