17' x 12' x 53'9" Deep Diversion Box - COH Upper Brays

Project Location
Houston, Texas
Construction cost
$684,000
Construction Start/End
2017 - 2018

Details

When was it constructed and how long has it been in service:
This new diversion structure was installed in 2017 as part of a larger project that extended over 3 miles to the Upper Brays WWTP. A guided weir channel was added during construction to allow the 108” to be isolated from the incoming 72” and 78” lines for future inspection, maintenance and cleaning.
Dimensions:

14' x 12' x 53'9" CAST-IN-PLACE BOX STRUCTURE

Depth of structure:
Diversion box was a finished ID of 53'9"
Health and safety:
Used conventional confined space entry program and trench shoring.
Has any re-inspection been performed? What was the condition of the structure?
Yes, the structure was in perfect condition.

Methodology

Danby Panel Lok III-E Panels to create a cast-in-place box structure.

Method of flow bypass or diversion, if used:
A combination of bypassing flow through plugs and pump diversion was used to gain access to the tunnel.

Hurdles

Problems encountered during construction:
None
Problems encountered after construction:
None