First Ones In, Last Ones Out
Building tunnels is grueling work and so is finding a company with the know-how and dedication to get it done safely, on time, and within budget. You will experience what it’s like working with people, equipment, and material committed to providing unrivaled best-in-class service. Our job isn’t done until you get the recognition you deserve for the win.
Constructing ground support systems near the excavation point, inside the tunnel, and behind the shield or TBM to erect man-sized tunnels.
Tunnel construction using hydraulic jacks to directly install pipe by pushing the pipe through the ground behind a tunnel boring machine or shield.
Installing steel casing by means of a rotating cutting head. Spoil is removed back to the drive shaft by helical wound auger flights rotating in a steel casing.
Meet The Team
Superintendent & Partner
Dispatch & Safety Director
Oversees Equipment, dispatch, shop operations, and Safety
Accounts Receivable & Payroll
Meet The Founders
James was raised in the Central Valley. He attended Manning Elementary School near Easton where his mother was a teacher, and he graduated from Washington Union High School in 1962 with David.
In 1978, David and James began working together at a horizontal drilling company. During their time there, they met Calistro Terrasas, or “Cal,’’ as he was known by friends.
Cal lived most of his life in Clovis, California before serving in the United States Army for six years. The summer he returned home, Cal joined his father working at the same company David and James were employed at.
David Cline was born in Selma, California and attended high school at Washington Union High School in Easton. It was there that he met his lifelong friend and future business partner, James Gardner.
After high school, David served in the Navy as a medical corpsman for four years.
He returned to the Central Valley, worked as a surgical technician at Saint Agnes hospital, then attended Fresno State where he graduated with a degree in business.
From The Ground Up
Photo | (Above) Left: James Gardner, Center: Cal Terrasas, Right: David Cline
What kind of a person works in grueling temperatures, builds tunnels through all kinds of difficult soil conditions, and endures icy tunnels 100 feet under the Pacific Ocean? Who would live without heat in their own home so they can ensure their employees are taken care of? Who would risk everything in an attempt to build something revolutionary from the ground up? You might think that a man must have an ounce of crazy in his blood to subject himself to such conditions…you would not be far from the truth.
40 years ago, Pacific Boring began as a simple vision shared by three men who had the kind of grit and radical disposition to start building the vision into a reality.
The trio worked together for three years at a horizontal drilling company before one day Cal says to David, “You know, we could do this. We could run our own company.”
In 1981, Pacific Boring was born. The three men built Pacific Boring from the ground up. Cal directed the crew as the general superintendent, James ran the auger-boring side of the company as shop foreman, and David managed daily operations and bookkeeping as Pacific Boring’s president.
Over the next four decades, Pacific Boring would become a leading tunneling contractor in the United States. Through incredible determination, great partners, tremendous sacrifice, and a people-first mentality guiding every decision.
“What set them apart was their willingness to take a chance. They risked everything, every day.”
About Pacific Boring’s Founders
Boreman Hall Of Fame
Time Is Not A Thing To Waste
Making the most of every moment given to you is the lifeblood of success. That same blood runs through our veins, and the hearts of our founders. Battling the elements, enduring harsh tempratures, confronting dangerous situations… all for the good of humankind. Where would we be without people like these?
Since the beginning, Pacific Boring has been about taking risks, buidling new things, taking care of each other, fulfilling needs, believing we can do it, overcoming fear, and learning every day.
It has led to where we are today. It is defining our future, as we stand on the shoulders of giants.
Partnerships That Stand The Test Of Time
“We learned a lot from Pacific Boring about what to put into a machine and why. They know how to match the right equipment with the right project.”
– Maynard Akkerman
“With Pacific Boring, it seems like the tougher the project, the better they do. Great crews and owners.”
– Mladen Buntich Jr.
“Class A, hard working people who take care of their employees. I always recommend Pacific Boring because they are honest, they meet your schedule, and they are very price competitive.”
– Greg Streicher