Daily Journal of Commerce / AGC News-Update
Monday, March 7, 1994

The new soda ash storage facility at Terminal 4 in Portland is getting its start at the bottom of a 40 foot sandy berm. The diamond shaped building will eventually rise to more than 100 feet high. Colamette Construction is the civil contractor on the project.

Colamette hits home run with
HalI-Buck Marine project

A diamond will soon be rising from the sandy soil at Terminal 4 in North Portland. The baseball diamond shaped concrete and steel building will be used as a bag house and storage for soda ash for Hall-Buck Marine.

The concrete slab being poured will be the floor of a tunnel and conveyor system at the base of the building. With the excavation being so close to the Willamette River, de-watering has been a big part of the job.
Colamette Construction, the civil subcontractor on the project, is working with Spantec Constructors, a Canadian general contractor, to build the unique 31,000-square-foot structure. It gets its shape from having a tunnel and conveyor system at home plate or the bottom of the building. The sides then rise at 45-degree angles along a sand berm to first and third base. The diamond is enclosed more than 100 feet above home plate at the second base, the keystone.

The concrete slab now being poured at the base of the building will become the floor of the tunnel. The fact that it is 22 feet below grade and below the crest of the river, has meant that de-watering is a major element of the project so far. The berm is a combination of excavation material and trucked-in river sand. When completed it will rise 20 feet above grade.

Ten-foot sections of pipe will eventually become an access route to the tunnel section of the storage facility.

"This is a good project for us," says Colamette Project Manager Greg Whitaker. "Having worked with Spantec on another project at Terminal 4, we have experience with the conditions at the site.

"Our company has done quite a lot of specialty contracting projects over the years. This unique and challenging building fits that category very well."
Relocation of some of the storm sewers on the site are a part of Colamette Construction's work on the job.
return to journal section