Tesoro Refineries
Mandan Refinery

Mandan Refinery
Facts & Figures



Rated crude oil capacity:
60,000 barrels per day

Product slate:
Gasoline, diesel fuel, jet fuel, propane, butane

Feedstocks:
Primarily Williston Basin sweet crude oil

Acreage and location:
960 acres, near Mandan, North Dakota

Number of employees:
Approximately 220

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The Tesoro Mandan refinery began operations in 1954, three years after crude oil was discovered in North Dakota, with an initial capacity of 30,000 barrels per day. Today, the refinery has a capacity of 60,000 barrels per day and processes primarily sweet (low sulfur) domestic crude oil, from North Dakota. The facility manufactures gasoline, diesel fuel, jet fuel, heavy fuel oils and liquefied petroleum gas. Most of the refinery's products are shipped via pipeline to eastern North Dakota and Minnesota.

Tesoro operates more than 900 miles of crude and product pipelines, transporting more than 380,000 barrels per day across our system. The largest part of this system is a 750-mile crude oil gathering and mainline system that delivers all of the Mandan refinery's crude supply.

Tesoro distributes approximately 85 percent of the Mandan refinery's production through a third-party refined products pipeline system that serves various areas from Bismarck, North Dakota to Minneapolis, Minnesota.

Tesoro Mandan occupies 960 acres and is situated on the Missouri River in central North Dakota, approximately five miles west of Bismarck, in Mandan.

Environment. Tesoro's Mandan refinery has dedicated about 640 acres of its property adjacent to the refinery's process units and tank farm to serve as a natural wildlife habitat. Originally constructed in 1972 as part of an engineered wetland for treated wastewater, the area has been enhanced over the years to provide exceptional wildlife habitat. Waterfowl, wild turkeys, pheasants and the endangered Least Tern nest in the area. Deer, coyotes, foxes and badgers also live and forage within its boundaries.

Employees at the Mandan refinery have built nesting structures and planted thousands of trees, including fruit trees, to provide cover and food for the refinery's wildlife.

For this outstanding example of environmental stewardship, the Mandan refinery has received national recognition from the Nature Conservancy, the Wildlife Habitat Council and the National Wildlife Federation.

Health and Safety. Tesoro's vigilant safety programs have contributed to continuing improvement in employee safety over the past several years. This can be seen in our 45 percent reduction in the frequency-of-injury rate since 2004. In 2006, we posted the lowest Occupational Safety and Health Administration recordable incident rate in our history.

In 2007, the Mandan refinery attained Merit status under the Occupational Safety and Health Administration's Voluntary Protection Program. The refinery was also recognized in 2006 by the National Petrochemical and Refiners Association (NPRA) with the Gold Award, which recognizes facilities that have reduced by 25 percent or more their total recordable incident rate with no workplace-related fatality of an employee or non-employee
during the calendar year.

The refinery also won the NPRA's Meritorious Safety Performance Award for achieving a total recordable incident rate of 1.2 or less with no workplace-related fatality of an employee or non-employee during the calendar year. NPRA also awarded the Mandan refinery with the Award for Safety Achievement: 1+ Years, recognizing it for operating one or more years without an employee lost workday case involving days away from work and without a workplace-related fatality of an employee or non-employee during the evaluation period.

Community. Tesoro and its employees partner with surrounding communities, donating not only money but also time to support local activities focused on education, environment and community vitality.

The Mandan refinery and its employees, in particular, are recognized for a tradition of commitment and contributions to the communities of Mandan and Bismarck and to the state of North Dakota.

This commitment is reflected by Tesoro's contributions to the Missouri Slope Area wide United Way and by the support of more than 70 volunteers, representing one-third of the refinery employees, who give countless personal volunteer hours each year to the Golden Age Project, which makes repairs and improvements to the homes of senior citizens. Employees also raise thousands of dollars each year to support cerebral palsy research through participation in the Great American Bike Race.

Among the areas that benefit and enrich North Dakota communities, Tesoro Mandan is most passionate about education and the environment. For the past 17 years, Tesoro Mandan refinery employees have joined with Mandan and Bismarck Girl Scouts and Boy Scouts and the Mandan and Bismarck City Forestry and Parks and Recreation Departments to plant more than 300 trees and bushes in honor of Arbor Month each May.

In 2007, Tesoro awarded a $50,000 grant to help restore native prairie areas, improve wildlife habitat, and develop educational and recreation opportunities at President Theodore Roosevelt's Elkhorn Ranch in North Dakota.