A highway project that consisted of innovative concrete pipe work has won a national award.

The Veterans Parkway project in Sioux Falls, South Dakota, is the winner of the 2021 Project Achievement Award from the American Concrete Pipe Association.

The $55.6 million six-lane divided-highway project between I-90 and Rice Street involved the placement of:

More than 17,000 feet of Class II, III, IV and V reinforced concrete pipe.680 feet of 60-inch Class IV and Class V RCP jacking pipe.382 feet of box culvert with a 90-degree bend.More than 150 precast inlets and junction boxes.

One of the more innovative aspects of the project involved protecting a historic wooden truss railroad bridge from erosion. To accomplish this, a box culvert was constructed with a 90-degree bend to collect multiple outlet pipes from a detention pond and release them to one location, according to ACPA.

The project also built a drainage system, while not interrupting traffic on I-90, to prevent flooding on the highway. Crews jacked twin 60-inch reinforced concrete pipes under the interstate, which handles about 25,000 vehicles a day, to save time and money.

Hancock Concrete Products of Sioux Falls, HDR Engineering and the South Dakota Department of Transportation collaborated on the project. Their innovative designs also led to cost savings, ACPA says.

“The adaptability and dependability of the reinforced concrete pipe on this project provided a way to solve complex drainage solutions, and Hancock Concrete Products is proud to have contributed to its success,” says Ray Pierson of Hancock Concrete Products. “By choosing concrete pipe, SDDOT has provided taxpayers with a drainage solution with long-term strength, longevity and durability, that’s also produced locally and supports our region’s economy.”

Riley Brothers Construction of Morris, Minnesota, is the contractor on the project. T&R Contracting of Sioux Falls paved the concrete highway’s surface.

ACPA’s Project Achievement Awards recognize agencies that have demonstrated creative and innovative accomplishments through projects that use precast concrete pipes or boxes.

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A post popped up on an online forum on the Historical Construction Equipment Association’s website.

“Unit backhoe for sale,” it read. “It runs good.”

“And that’s all it says,” recalls Cliff Bridgford of the post that came up about 20 years ago. “I didn’t pay much attention to that.”

Six or so months before, Cliff had been at an antique engine show in Connecticut when a collector arrived with a 5/8-yard Unit 617 with a backhoe attachment, also called a trenchhoe, pullshovel or hoe.

“I’ve always wanted one of these, ever since I was a kid,” Cliff told his friend Ed.

“I know this guy who’s got two of them,” Ed replied. “I don’t have his name with me, but I’ll get back to you.”

The late-1950s cable shovels had been a common sight when Cliff was growing up in New Hampshire, just before hydraulic equipment began to take over. He recalls getting a toy Unit 357 shovel as a boy. “It came with a clamshell and crane hook and boom,” he says. “And I ended up making all the different attachments for it with my Erector Set.”

Unit shovels can trace their history back to Henry Ford’s brother William, who formed the Wilford Shovel Company in Detroit in 1925. It became the Universal Power Shovel Company in 1927. A year later, Universal was acquired by Unit Corporation of America. The shovel segment of the company was sold in 1937 and continued as the Unit Crane & Shovel Corporation.

Two Units for the price of one 

A few months after Cliff’s talk with Ed, Ed called back with the Units’ owner’s phone number. When Cliff called, he learned the machines had already been sold.

A few months later, he was on the HCEA forum when the Unit backhoe post appeared.

After Cliff dismissed the post, someone else joined the forum.

“You know,” the post read, “it’d be a lot easier to sell your Unit backhoe if you told us where the thing was.”

The owner then responded with his contact information, and several months later, Cliff was in New York having a look at the machines. Turns out, the same Unit machines his friend Ed told him about were now with the owner in New York – a 1955 Unit 357 shovel and a 1958 Unit 614 backhoe.

“So this was the guy that bought the machines from the guy that Ed had talked to, which was really kind of remarkable,” Cliff recalls.

The Unit 357 shovel wouldn’t start, but the Unit 614 backhoe would. “It didn’t run good at all,” Cliff says. “But it ran.”

The owner gave Cliff a reasonable price for the Unit 614 backhoe, but Cliff wasn’t sure about it. He really wanted the Unit 357 shovel. He said he’d think about it, and started to leave.

“Wait a minute,” the owner said. “I’ll tell you what. If you really want the shovel, I’ll sell you both of the machines for the price of the one.”

“My two treasures” 

When the Units were delivered to his home in Litchfield, New Hampshire, he focused on restoring the Unit 614 backhoe, since it still ran.

“I basically took pretty much everything off the machine that I could lift off,” he says.

He overhauled the engine, a 2-cylinder Detroit Diesel 2-71, made new control linkages and bushings. He overhauled the clutches. He performed all the welding, machining and mechanical repair. He sandblasted and painted it.

He restored it over seven years, after work, on weekends and on days off.

“It came out pretty decent,” he says. “Not too bad for a one-man restoration.”

It made its debut at the 2007 national show of the Historical Construction Equipment Association at the Zagray Farm Museum in Connecticut. A friend who is an expert operator taught him how to run it. The 614 still resides at the museum, where Cliff brings it out for three shows a year.

Cliff Bridgford restored his 1958 Unit backhoe by himself over a seven-year period.Submitted by Cliff BridgfordLearning to operate it took some time. He had run equipment in his teens for a residential contractor. He later graduated from diesel engine mechanic school. He was drafted and served as a mechanic in Vietnam during the war. After the war, he opened his own auto transmission business, which he operated for 45 years.

“I never lost my fondness for construction equipment,” he says.

But he had never operated the cable machines. The 614 has a fixed-angle, half-yard bucket. The machine weighs about 15 tons.

A drag cable is used to pull the bucket in to dig. A hoist cable raises the boom and bucket. That’s controlled by two clutches and two brakes. A swing clutch is used to swing left and right.

“They’re a pretty quick, efficient machine,” Cliff says. “It’s actually faster than any 1958 hydraulic backhoe was.”

Over the years, Cliff learned to operate the 614 efficiently, but he doesn’t consider himself an expert.

“A hydraulic excavator is a lot easier to operate,” he says. “If you were running a hydraulic excavator, and all of a sudden you got confused and you let go of all your controls, the thing would just stop right where it was. The bucket would remain in the air.

“If you got confused on a cable machine, gravity’s going to take over.”

The bucket comes crashing down.

“There’s a lot more skill involved in a cable machine.”

Cliff Bridgford with his 1955 Unit 357 shovel at his home in New Hampshire.Submitted by Cliff Bridgford 

 

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Vermeer added a new midsize model to its truck-mounted vacuum excavator line with the introduction of the VXT300 truck vac. Outfitted with an eight-cubic-yard spoils tank and a six-inch dig tube, the new vacuum excavator can carry up to 800 gallons of water.

With an overall height of 11.5 feet, the new machine is one of the lightest truck vacs on the market and is designed for contractors who drill multiple holes per setup and need large volumes of drilling fluid. The VXT300 also represents a new generation of vac trucks for Vermeer which will replace the VXT8 Mega series.

A Kenworth T370 truck chassis with a 350-horsepower diesel engine and 6-speed 3000 RDS Allison transmission undergird the vacuum system. The truck’s PTO powers a Roots 624 vacuum blower that generates a maximum flow of 3,500 cfm and suction pressure of 18 inches/mercury. For crew efficiency, the PTO also allows the vac to keep running while repositioning the truck between holes on jobs where multiple holes are being excavated.

The spoils tank cam-over-hydraulic door and in-tank washout keep things clean with the VXT300. Optional features include a winter package with a water heater as well as an onboard PTO driven air compressor.

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Caterpillar and Champion Iron have signed a letter of intent to develop advanced drilling technologies based on artificial intelligence.

Over time the two companies intend to develop a remote-controlled and fully autonomous Cat electric drilling fleet to create a “drill-to-mill” system that will automate the entire process from drilling to loading to hauling to the mill. Once implemented, the process will increase efficiency and lower costs at the drilling and blasting site, the loading and haul segments and downstream processing.

Champion is a Canadian mining company and through its subsidiary Quebec Iron Ore, owns and operates the Bloom Lake Mining Complex, an iron ore mine located near Fermont, Québec. Caterpillar’s independent dealer, Toromont Cat, will provide aftermarket support for the collaboration.

Caterpillar’s integrated technology will use real-time data, artificial intelligence and analytics, to assess the status of machines, technologies, and material to enable more timely and accurate operational decisions and consistent execution across Champion’s mining value chain. The goal is to deliver a fully integrated technology solution powered by data connectivity and advanced analytics. This will improve workflow between the mine and plant and provide a more efficient end-to-end process that delivers more consistent raw material.