After review, Tempe may stick with rubber dams at Town Lake

Inflatable rubber dam

Four bladders can be lowered or raised quickly by adjusting air pressure. This is the current system in place at Tempe Town Lake.

Hinged crest gates, hydraulic operation

Steel gate panels are hinged at the bottom and are adjusted with overhead pier-mounted hydraulic cylinders

Hinged crest gates, electric operation

Steel gate panels are hinged at the bottom and are operated with a wire rope on electric motor hoist

Fusegates

A row of concrete buckets fill when the lake rises and wash out when overtopped.

Obermeyer crest gates

Steel gate panels are supported on the downstream side with small inflatable air bladders. The lake level can be adjusted by controlling air pressure in the bladders.

[Tim Hacker/Tribune]

Tempe Town Lake Dam Bladder

A sprinkler system mounted below the new bridge built over the west end rubber dam bladder at Tempe Town Lake, Monday, September 19, 2011. [Tim Hacker/ Tribune]

[Tim Hacker/Tribune]

Tempe Town Lake Dam Bladder

A sprinkler system mounted below the new bridge built over the west end rubber dam bladder at Tempe Town Lake, Monday, September 19, 2011. [Tim Hacker/ Tribune]

[Tim Hacker/Tribune]

Tempe Town Lake Dam Bladder

A sprinkler system mounted below the new bridge built over the west end rubber dam bladder at Tempe Town Lake, Monday, September 19, 2011. [Tim Hacker/ Tribune]

[Tim Hacker/Tribune]

Tempe Town Lake Dam Bladder

A sprinkler system mounted below the new bridge built over the west end rubber dam bladder at Tempe Town Lake, Monday, September 19, 2011. [Tim Hacker/ Tribune]

[Tim Hacker/Tribune]

Tempe Town Lake Dam Bladder

A sprinkler system mounted below the new bridge built over the west end rubber dam bladder at Tempe Town Lake, Monday, September 19, 2011. [Tim Hacker/ Tribune]

[Tim Hacker/Tribune]

Tempe Town Lake Dam Bladder

A sprinkler system mounted below the new bridge built over the west end rubber dam bladder at Tempe Town Lake, Monday, September 19, 2011. [Tim Hacker/ Tribune]

[Tim Hacker/Tribune]

Tempe Town Lake Dam Bladder

A sprinkler system mounted below the new bridge built over the west end rubber dam bladder at Tempe Town Lake, Monday, September 19, 2011. [Tim Hacker/ Tribune]