4-6 inch power duct bank in North Sioux City, South Dakota

4-6 inch power duct bank in North Sioux City, South Dakota

Construction workers installing underground utility cables using miniature excavators, with train cars and a train track in the background on a cloudy day.

Construction workers installing underground utility cables using miniature excavators, with train cars and a train track in the background on a cloudy day.

Construction workers install underground utility lines next to a highway, with train tracks and freight cars in the background.

Construction workers install underground utility lines next to a highway, with train tracks and freight cars in the background.

Large construction vehicle with coiled black pipes on its flatbed, parked outdoors on a grassy field under cloudy skies, with power lines in the background.

Large construction vehicle with coiled black pipes on its flatbed, parked outdoors on a grassy field under cloudy skies, with power lines in the background.

A flatbed truck carrying large coiled pipes parked on a grassy field near train cars and utility poles under a cloudy sky.

A flatbed truck carrying large coiled pipes parked on a grassy field near train cars and utility poles under a cloudy sky.