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ENR Midwest’s 2020 Best Projects


BOLD Transmission Line Project, Indiana
Marion, Ind.
Best Project

Owner: American Electric Power
Lead Design Firm: American Electric Power
General Contractor: Cianbro
 

The 35-mile project marks the debut of BOLD (Breakthrough Overhead Line Design), an innovative low-profile double-circuit transmission line system designed to maximize power delivery capacity while also minimizing visual impacts. The project replaced a vintage 138-kV, double-circuit line with a double-circuit, 345-kV/138-kV hybrid line without the need for additional right-of-way.

As the BOLD structure design required a different approach from conventional tower construction processes, the project team collaborated with the owner and material manufacturers to review component specifications and develop work packages. To ensure adherence to the owner’s exacting installation standards, the team also spent many hours reviewing, developing and refining quality plans.

This extensive review turned challenges arising from the new tower structures’ curved arm design and compact conductor spacing into opportunities to complete the two-year project below budget and ahead of schedule.

Transporting BOLD tower components using a combination of 48-ft and 25-ft flat-deck trailers substantially reduced the number of staging trips to each location. Tapping expert rigging assistance, the team assembled the unique curved arms using custom-length slings and designated pick points. This process minimized the number of new crane setups, allowing new structures to be set concurrent with removal of existing lattice towers. Changing the sequence of assembling conductor hardware and insulators provided a safer environment for helicopter crews to assist with installing conductor pulling ropes.

Other costs- and labor-saving innovations further expedited the installation process, including establishing a new structure arm tie-down and a method that allowed two conductors to be pulled simultaneously.

Originally published in ENR Midwest, November 10, 2020

NOTE: DDIN Stringing Blocks were used for this project which is why we re-published this article.

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All the best tools & Equipment Linemen need every day

At Tallman Equipment, our priority is to set the standard in the electrical transmission and distribution industry with an all-inclusive approach to serving our customers. We carry the best lineman tools and equipment from many of the top manufacturers in the business today. Our vision to deliver a trio of quality, convenience, and reliability is driven by listening and adapting to our customers’ needs. We work with our clients to ensure they find the right lineman tools and equipment for the job. For more information on any of the products we sell, give us a call today at 877-860-5666.

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Tool & Equipment Rental

When new equipment purchases aren’t an option, Tallman Equipment’s tool rental department is here to meet your shorter-term needs! We house a large inventory of the most commonly used equipment for the construction and maintenance of electrical transmission and distribution systems.

Tool & Equipment Repair

We consider no tool to be outside the experience and training of our technicians. Some examples of commonly repaired tools include hydraulic, pneumatic, gas, and battery-powered equipment, stringing blocks, dynamometers, chain hoists, strap hoists, capstan hoists, and rope products.

Grounds & Jumpers
Manufacturing, repair and refurbishment 

Tallman Equipment has a full-service assembly department skilled in building and repairing custom grounds and jumpers. We can build customized grounds and jumpers to your specifications as quickly as a day. Our testing process meets ASTM standards

Transformer Sling

Manufaturing & Rope Repair

Tallman leads the industry in developing and manufacturing transformer slings. Whatever your need may be, our trained and certified Master Splicer can build custom rope assemblies for unique applications, along with winch lines for buckets, diggers, bumper winches, and high strength tow ropes.

Fiberglass

Testing, Repair & Refinishing

Tallman offers complete repair and reconditioning of your fiberglass tools compliant with OSHA and ASTM standards. Our technicians can tackle all brands of hot sticks, conductor and support gins, ladders, extension arms, shotgun sticks, fixed sticks, and much more.

Rubber Goods
Cleaning & Testing 

Tallman is now offering rubber goods testing and cleaning of linemen’s rubber gloves, blankets, sleeves, hoods, line hose, and hardcover. All testing and procedures conform to ASTM standards and involve thorough washing, visual inspection, dielectric testing, and date stamping.