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Construction

Schedule
Construction Schedule
Description
A: Stake for final structures and right of way
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Task Description: Survey crews stake the final structures, edge of right of way, clearing and access locations, wetlands or other environmentally sensitive areas

Timeframe: Fall 2015 through 2018

Where task will occur: Entire right of way 

Access type and equipment: Foot and vehicle (Pickups, ATVs)

Visits to location: 1 to 3

Visit duration: 1 to 3 days per visit 

B: Build access points and laydown yards
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Task Description: Crews build access points and laydown yards for construction. This includes installing road approaches, improving existing roads, clearing trees, blading rough terrain, laying wood timber matting in wet areas, and installing gates.

Timeframe: Fall 2015 through spring 2019

Where task will occur: Right-of-way and non-right-of-way access may be required.

Access type and equipment: Heavy equipment (Pickups, ATVs, Skid steers, Backhoes, Bulldozers, Dump trucks, Tractors and trailers, Matting, Straight trucks (2.5 Ton Flat Bed), Wheel loaders)

Visits to location: multiple as required

Visit duration: 1 to 5 days per visit depending on property

C: Install foundations
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Task Description: Crews drill holes for the foundation, set steel cages, pour and cure concrete, and remove forms.

Timeframe: Summer 2016 through 2018

Where task will occur: Foundation work will occur at the structure locations. Right-of-way and non-right-of-way access may be required.

Access type and equipment: Heavy equipment (Pickups, Drill rigs, Straight trucks (2.5 Ton Flat Bed), Skid steers, Dump trucks, Tractors and trailers, Wheel loaders, Small cranes, Concrete trucks)

Visits to location: 2 to 5

Visit duration: 3 to 15 days per visit

D: Haul structures
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Task Description: Crews haul structure sections (pole shaft sections, davit arms, insulators, etc.) to the structure location.

Timeframe: Fall 2016 through fall 2018

Where task will occur: Right-of-way and non-right-of-way access may be required.

Access type and equipment: Heavy equipment (Pickups, Tractors and Trailers, Wheel loaders)

Visits to location: 1 to 3

Visit duration: 1 day per visit 

E: Frame structures
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Task Description: Crews assemble the structure by bolting the pole shaft sections together, attaching the davit arms, and installing parts of the insulator assemblies.

Timeframe: Winter 2016 through fall 2018

Where task will occur: Framing work will occur at the structure locations. Right-of-way and non-right-of-way access may be required

Access type and equipment: Heavy equipment (Pickups, Cranes, Air compressors)

Visits to location: 1

Visit duration: 1 day per visit 

F: Set structures
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Task Description: Crews pick up, set, and bolt the assembled structure to the foundation.

Timeframe: Winter 2016 through fall 2018

Where task will occur: Structure work will occur at the structure locations. Right-of-way and non-right-of-way access may be required.

Access type and equipment: Heavy equipment (Pickups, Cranes)

Visits to location: 1

Visit duration: 1 day per visit 

G: String wire
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Task Description: Because conductor is too heavy for a helicopter to lift, the helicopter first carries a rope from the ground to the top of the structure. Hovering between 30 and 80 feet from the structure, the helicopter sets the rope into the traveler, which looks like a pulley. The traveler has a trap door to allow the rope in but to prevent it from falling out, securing it in place. The helicopter continues on to the next structure, pulling the rope as it goes. After the helicopter installs the rope, crews connect the rope to the conductor. Crews then use a machine on the ground to pull the rope and set the conductor.

Timeframe: June 2017 through October 2018

Where task will occur: Right-of-way and non-right-of-way access may be required.

Access type and equipment: Heavy equipment, including pickups, ATVs, bulldozers, stringing equipment, tractor trailers, wheel loaders, and helicopters

Visits to location: 2-3

Visit duration: 5 to 20 days per visit 

H: Clip wire
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Task Description: Crews will use bucket trucks to attach the wire to the structure.

Timeframe: Winter 2017 through winter 2018

Where task will occur: Wire work will occur at the structure locations. Right-of-way and non-right-of-way access may be required.

Access type and equipment: Heavy equipment (Pickups, Bucket Trucks)

Visits to location: 1

Visit duration: 1 day per visit 

I: Clean up and restoration
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Task Description: Depending on the right-of-way condition, crews may decompact the ground, reseed pasture, grade roads, remove road approaches and debris, and restore laydown yards by grading and removing all material and debris. Crews will restore roads per county road-use agreements.

Timeframe: Winter 2017 through spring 2019

Where task will occur: Right-of-way and non-right-of-way access may be required.

Access type and equipment: Heavy equipment (Pickups, ATVs, Tractors with blade/ripper, Skid steers, Dozers, Seeding equipment)

Visits to location: multiple as required

Visit duration: 1 to 5 days per visit depending on property

 

J: Inspection
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Task Description: Inspectors will monitor the right-of-way and construction throughout the project.

Timeframe: Fall 2015 through summer 2019

Where task will occur: Right-of-way and non-right-of-way access may be required.

Access type and equipment: Foot and vehicle (Pickups, ATVs)

Visits to location: multiple as required

Visit duration: as required

©2017 Otter Tail Power Company and Montana-Dakota Utilities Co.

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