September 21, 2016
June 15, 2016
Sixty goats were on the grounds at the Sellwood Bridge project in Portland, Oregon.
Some of our subcontractors at the Sellwood Bridge project have horns, hooves and a healthy appetite for brush. They prefer night work, take daily power naps together and never request time off.
That’s because they’re goats. No kidding.
The goats were tasked with removing brush from the site and they will come back in the spring for more work.
The Slayden/Sundt Joint Venture transportation project in Portland, Oregon, has had a commitment to green measures from the beginning. Having 60 goats working together to get rid of brush eliminated waste that would be generated by humans thinning the thicket by hand. The City of Portland asked the team to clear the trail on the east side of the Willamette River on the $228 million project.
The lively livestock spent a couple of weeks onsite this month and are returning in the spring to eat blackberry vines.
The animals are owned by Goat Power, a husband and wife who travel the Willamette Valley with their four-legged friends in a refurbished bus. The goats go from one job to the next, working months at a time.
But the bearded wonders won’t completely replace humans on the Sellwood cleanup crew: People will still remove old vines and trim trees.
March 2, 2016
Parts of the old Sellwood Bridge are being recycled at a Portland steel plant.
Pieces of Portland, Oregon history are being shipped down the Willamette River to find new life. The Slayden/Sundt Joint Venture has started removing massive steel truss spans from the old Sellwood Bridge, which opened in 1925, and transporting them via barge 10 miles downriver to a plant for recycling.
The joint venture team has been working with its subcontractor, an independent design firm and the owner’s design team for more than six months planning the “shoofly” removal. Before the removal could start the team had to add strengthening to the temporary piers and truss section at specific locations to counter the forces applied to the remaining sections during lowering.
The truss will be taken down in a total of nine pieces. The four main sections, measuring 200 feet apiece, will be lowered onto a barge using four 250-ton strand jacks. Each will take approximately a week to remove.
The remaining five smaller sections above each temporary bent will be hoisted onto a barge using a derrick crane. Once the shoofly truss and substructure are dismantled, a marine subcontractor will remove the 80-pipe pile from the river.
“The riveted-steel truss will be processed and sold on the open market as a scrap commodity to a steel mill or foundry for use in the production of new steel,” said Senior Project Engineer Matt Fisher. “Recycling the old bridge contributes significantly to the sustainability characteristics of this important infrastructure project.”
December 16, 2015
Thousands of Portland residents turned up Feb. 27 for the grand opening of the new Sellwood Bridge.
Ladies and gentlemen, start your engines. Bring your bikes, too.
The new and greatly improved $227 million Sellwood Bridge is open in Portland, Oregon. The Slayden/Sundt Joint Venture team celebrated with the community at a grand opening for pedestrians this past weekend. Motorists were allowed to start using the bridge Tuesday.
The public had been using a detour bridge during the construction period, resulting in no more than 20 days of closures over four years. The JV’s contract with Multnomah County called for 30 days at most.
When the bridge opened in 1925, it was a welcome upgrade from a ferry service that shuttled passengers across the river. But the narrow two-lane bridge had fallen into disrepair and scored only a two out of 100 on a federal bridge sufficiency rating scale.
It was one of the more complex heavy civil jobs the company has undertaken with issues to be expected from an outdated bridge used by 30,000 vehicles every day in an earthquake-prone area all while sticking to a budget funded by taxpayers.
“The complexity, the bridge translation, procurement method and size of the project puts Sundt in the league of premier bridge builders in the country,” said Sundt Business Development Manager Cade Rowley.
While the public is traveling on the main bridge, more work has to be completed. The rest of the year’s schedule includes removing the temporary bridge structure used for the detour, getting rid of work bridges and associated piling in the river, constructing a pedestrian bridge and trolley line on the west side, as well as finishing Phase 2 of a condo project on the east side. That work involves reconstructing small garages, storage buildings and a parking lot under the new bridge.
Even the wrap-up work has its share of unique challenges. The team will cut the old bridge into four 400-foot-long pieces and float them to Schnitzer Steel 10 miles downriver. Pilings must be removed during the in-water work window of July 10 to Oct. 15 so salmon swimming through the Willamette River won’t be disturbed.
To get a sense of the project scope, please take about four minutes to watch a time-lapse video recently posted by Multnomah County.
The Transcendental Brass Band was among entertainers at the opening.
October 28, 2015
Sundt’s work on Sellwood Bridge in Portland, Oregon took a major step toward completion earlier this month when the last major deck pour was completed on the main structure. This is a huge milestone for the project that allows the team to start sidewalks and parapet construction in preparation for opening early next spring.
The first deck pour was performed Oct. 20. Sundt and joint venture partner Slayden Construction are replacing the present Sellwood Bridge, a 2,000-foot structure that crosses the Willamette River.
In order to place a concrete deck, the specifications requires less than a 30 percent chance of rain before, during and after the pour, which required a 12-hour window. Finding this window in Portland during the winter is a challenge, requiring pours to start as early as 3 a.m. The specifications additionally require the concrete to be above 60 degrees, posing a problem when temperatures dropped into the 20s, requiring the concrete to be heated to remain within specifications.
Rather than rebuilding the bridge in sections and shifting traffic back and forth between the old structure and newly completed segments, the team created a ”shoofly” (detour) bridge to keep traffic flowing throughout the project. The approach involved lifting the old bridge deck and truss with hydraulic jacks and moving it to one side, then placing it on a set of temporary piers and connecting it to temporary approach spans so that traffic could continue using it while the new bridge is constructed.
Sellwood Bridge crosses the Willamette River in Portand, Oregon.
The first of 11 deck pours for the main span of the Sellwood Bridge was a self-performed success for Sundt on Oct. 20.
Sundt’s joint venture team self-performed the concrete work on the first of 11 pours on the bridge span.
The placement took 8.5 hours and involved 470 cubic yards of 4,000 PSI high-performance concrete with fiber. Fifteen craft employees used a 61-meter concrete pump to do the job.
The work required extensive coordination among the concrete supplier, concrete pump subcontractor, the joint venture quality control, Multnomah County quality assurance and Oregon Department of Transportation inspection teams.
Self-performing concrete construction enables Sundt to further ensure quality craftsmanship and save clients money.
Sundt and joint venture partner Slayden Construction are constructing the new Sellwood Bridge over the Willamette River in Portland, Oregon using a unique “shoofly” approach.The structure replaces a 2,000-foot-long, aging bridge.
The project is scheduled to wrap next year.