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Video produced in 2010 for TKDA’s Centennial

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Our Story

TKDA is 100 years strong and focused on the future

TKDA has provided forward-thinking architecture, engineering and planning to communities, government and private industries for more than 100 years. Throughout the decades, the company has maintained a strong commitment to quality design and service to both our community and our region’s infrastructure, playing a key role in designing the area’s roads, bridges, rail, mass transit, parks and trails as well as buildings and facilities for companies, schools and government agencies.

Founded in 1910 by Maximilian Toltz as the Toltz Engineering Company in Saint Paul, the company has played a significant role in designing the city’s landmarks, including the beloved Como Park Conservatory (now Marjorie McNeely Conservatory) the iconic Hamm Building and the Robert and Washaba Street bridges.

By 1956, Mr. Toltz added partners King, Duvall and Anderson. While the firm is now known as TKDA, we have never moved more than four blocks from our original offices in downtown Saint Paul. Over the years, TKDA has established ourselves as trusted experts who bring quality design and service in six distinct areas – architecture, aviation, building engineering, municipal engineering, rail and surface transportation. Our diversity, excellent reputation and capability to provide our clients with complete architectural, engineering and planning services has allowed our company to serve multiple markets, successfully weather challenging economic times and be well positioned for the future.

TKDA’s newly remodeled headquarters located on five floors of the UBS Tower in downtown Saint Paul is now home to more than 200 engineers, architects, planners and professional support staff. An additional 50 TKDA staff work across the country in offices in Duluth, Chicago, Los Angeles, San Bernardino, Seattle, Tampa and Vero Beach.

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1910
Photo of Max Toltz at office
TKDA Founded

German-born Structural Engineer Maximilian Toltz is Chief Engineer for the Great Northern Railroad, under its builder, James J. Hill. He founds the Toltz Engineering Company in the City of Saint Paul on August 1, 1910. The first offices are in the Pioneer Building. Civil/Structural Engineer Wesley King joins the firm that same year. 

1913
photo of the Allouez docks
Allouez Bay Ore Docks Complete

Allouez Bay Ore Docks on Lake Superior are completed for Northern Pacific Railway to ship from the region’s rich iron mines. The docks utilize the very latest in concrete slab techniques and are among the first in US to do so on such a massive scale. 

1913
Commission from E. L. Masqueray

Toltz Engineering Company receives a commission from E. L. Masqueray to design the heating system for the Saint Paul Cathedral. Construction of this landmark takes eight years with the cornerstone being laid in June of 1907 and the church opens for worship in March of 1915. The Saint Paul Cathedral is designated a National Shrine by the US Council of Catholic Bishops in 2009.

1915
Como Park Conservatory Complete

Como Park Conservatory (now Marjorie McNeely Conservatory) is completed. Toltz Engineering Company is the Designer of Record. Now listed on the National Register of Historic Places, the building has provided a lush garden escape through a century of Minnesota winters.

1919
Gerald Anderson Joins the Firm

Architect, Gerald Anderson, joins the firm specializing in school facilities. It is said that during the post World War baby boom, superintendents and school boards would “wait in line” to work with Anderson on their next school. 

1919
Company Name Change

Architect, Beaver Wade Day, joins the firm; company name is changed to Toltz, King & Day, Inc.

1919
Hamm Building Complete

Firm completes Hamm Building with design by firm Architect, Roy Childs Jones. Now listed on the National Register of Historic Places, the building is unique in the Twin Cities with ornate terra-cotta cladding on three sides of the building. Following his career at the firm, Jones becomes the Dean of the School of Architecture at the University of Minnesota.

1920
County Courthouse Design Begins

Toltz, King & Day commences on design for Stearns County Courthouse in St. Cloud, Minnesota.

1923
Photo of Union Depot
Union Depot Complete

Union Depot is completed in Saint Paul, Minnesota. Toltz, King & Day provides Structural Engineering. The building is designed by Architect, Charles Frost, who also worked with Toltz, King & Day on James J. Hill’s headquarters building for the Great Northern and the Northern Pacific railroads (180 East Fifth Street) in Saint Paul.

1926
Photo of Robert Street Bridge
Robert Street Bridge Complete

The firm completes the art deco Robert Street Bridge in Saint Paul in 1926. The bridge is designed using a “rainbow arch” to accommodate a raised rail platform at Saint Paul Union Depot. It is now listed on the National Register of Historic Places.

1927
Photo of Prince of Wales Hotel
Hotel Commissioned

Prince of Wales Hotel in Waterton, Canada, is commissioned by Great Northern Railway.

1928
New President for TKDA

Wesley King becomes president of the firm after Max Toltz’s retirement. 

1937
Rendering of Lanesboro treatment plant
Treatment Plant Complete

Lanesboro, Minnesota – Sewage Treatment Plant is completed.

1941
Photo of 3M Moderne Building
Moderne Building Completed for 3M

Toltz, King & Day completes a classic Moderne building for Minnesota Mining & Manufacturing Company’s (now 3M) new corporate office. Both companies have continued to grow since then and TKDA has completed hundreds of other projects for this iconic, Minnesota-born company. 

1942
Wyoming Air Base Complete

Casper, Wyoming Air Base is designed, built and has the first plane land within six months during World War II. To complete it on time, 300 employees work on the project, including the students of the nearby School of Engineering, who are hired to do survey work. The base provides training for B-17 pilots during the war.

1950
TKDA Completes Major Study

During the 1950s, the firm completes a major study for the Minneapolis-St. Paul Sanitary District (now Metropolitan Council Environmental Services) for expansion of services to the Metro Twin Cities.

1956
Company Name Changes

Name changed to Toltz, King, Duvall, Anderson and Associates (TKDA) to acknowledge civil engineer Arndt Duvall, architect Gerald Anderson and the other employees of the firm.

1956
Rendering of Coon Rapids Junior High School
TKDA Designs School

Coon Rapids, Minnesota – Junior High School is designed by TKDA.

1959
Duvall New TKDA President

Arndt Duvall becomes President of the firm. He is instrumental in developing relationships with municipal clients throughout the Metro area. During his term as President, Duvall receives the University of Minnesota’s Outstanding Achievement Award. The University also establishes an engineering scholarship in Duvall’s name. 

1960
TKDA Designs New Runway for MSP

During the 1960s, the north parallel Runway 12L–30R at Minneapolis-St. Paul International Airport (Wold-Chamberlain Field) was designed and built first to 6,000 feet and then extended to 10,000 feet in length. 

1960
Pig’s Eye Treatment Plant Expansion

During the 1960s, TKDA provides engineering and architectural design for the Metropolitan Wastewater Treatment Plant Expansion at Pig’s Eye Lake. 

1965
Space Tower Foundation Designed

The Space Tower foundation is designed for the Minnesota State Fair. This project begins a long-standing relationship providing renovation and expansion services to the Fair.

1970
Aerial photo of Pig's Eye Treatment Plant
Service Expansion at Pig’s Eye Plant

During the 1970s, expansion of services at Metropolitan Waste Control Commission Pig’s Eye Plant.

1979
Ryder New TKDA President

Civil Engineer, Robert Ryder becomes President. He is known for the special rapport he carries with clients such as the 3M Company, the US Army Corps of Engineers and the Saint Paul Port Authority. 

1981
Prew New TKDA President/CEO

Civil Engineer, Duane Prew becomes President/CEO. Prew proves to be a strong leader through tough economic times, setting the groundwork for the company to become employee-owned. 

1983
TKDA Renovates Historic Buildings

Renovation of the Pioneer and Endicott Buildings in Saint Paul, Minnesota, listed on the National Register of Historic Places.

1989
Photo of U of M Aquatics Center
U of M Aquatics Center

Mechanical, Electrical and Structural Engineering services are provided to the Stageberg Partners for completion of the University of Minnesota Aquatics Center.

1992
A New Office for TKDA

TKDA moves its office and expands its headquarters to four floors of 444 Cedar Street in Saint Paul, Minnesota.

1994
TKDA Sets Up an ESOP

TKDA creates an Employee Stock Ownership Plan (ESOP) to assist with ownership transition and create a stronger, more stable company as it moves forward. 

1997
Berkowitz New TKDA President/CEO

Civil Engineer, Darrel Berkowitz becomes President/CEO. Berkowitz is integral to winning large transportation projects in the Twin Cities, including the Wabasha Street Bridge. He is known as a strong marketer and advocate for Minnesota’s transportation system.

1997
Photo of Erickson Center Wellness and Athletic Facility
Ericksen Center Complete

Ericksen Center Wellness and Athletic Facility is completed at Northwestern College in Saint Paul, Minnesota.

1998
Photo of Wabasha Street Bridge
Wabasha Street Bridge Complete

TKDA, together with Figg Engineering, completes the Wabasha Street Bridge, a cast-in-place segmental concrete bridge with split roadways. This, our second bridge spanning the Mississippi River in Downtown Saint Paul, has won several awards, including the Federal Highway Administration Excellence in Highway Design and the Minnesota Society of Professional Engineers Seven Wonders of Engineering.

2000
Sobiech New TKDA President/CEO

Civil and Agricultural Engineer, Richard Sobiech becomes President/CEO. Sobiech reshapes the Employee Ownership culture and designs and implements a management structure to support TKDA’s new vision and to position the firm for growth.

2000
ESOP Process Complete

TKDA completes process to become a 100 percent employee-owned company.

2002
First Branch Office Opens

TKDA’s first branch office opens in Aurora, Illinois. The location is chosen to better serve our long-standing rail clients in the Chicago area and expand our services to eastern Class 1 railroads.

2003
TKDA Firm of the Year

TKDA wins Firm of the Year, presented by American Council of Engineering Companies of Minnesota (ACEC/MN).

2004
Photo of LRT station
Light Rail Transit Project Complete

TKDA oversees design implementation and construction of 15 LRT stations and Operations and Maintenance Facility as part of the design/build team completing the Hiawatha Light Rail Transit project in Minneapolis, Minnesota.

2005
Photo of Westminster Bridge
Westminster Junction Bridge

TKDA receives the ACEC Grand Award for Westminster Junction Bridge, our third major bridge design for the City of Saint Paul.

2006
New CEO and President

TKDA promotes Civil and Structural Engineer William Deitner to CEO and Civil Engineer Vincent Montgomery to President. Bill’s TKDA career spans 30 years. Vince has been with the firm for over 20 years.

2006
Photo of Runway 17/35
Grand Award for Runway 17/35

TKDA wins the ACEC Grand Award for Runway 17/35 at the Minneapolis-St. Paul International Airport. The firm has provided services aiding the airport’s growth for over five decades.

2007
TKDA Expands to West Coast

Expansion takes TKDA to Irvine, California. This office is opened to serve existing clients, as well as grow already developed relationships in the area.   

2008
Photo of I-35W St. Anthony Falls Bridge
I-35W St. Anthony Falls Bridge

The award-winning I-35W St. Anthony Falls Bridge is completed in Minneapolis. TKDA is the design engineer of record for the Interstate highway and local roadways, Second Street bridges, retaining walls, water resource engineering, pedestrian tunnel, signing, signals, utilities, lighting and maintenance of traffic on this critical bridge replacement.

2008
Photo of Hobson Yard
Fueling Platform Complete

Completion of a new mainline locomotive fueling platform for the BNSF Railway Company’s Hobson Yard in Lincoln, Nebraska. TKDA provided complete design and construction management services for this Project, which included mechanical systems of diesel fuel, lube oil, radiator water, heated wash water and sanding.

2009
TKDA Earns ACEC Grand Award

TKDA wins the ACEC Grand Award and national recognition for Andersen Corporation’s Steam Generating Facility. TKDA provides the planning and engineering design of the new facility which now produces 100 percent of its own steam production and heating requirements from renewable energy, eliminating reliance on coal-based steam.

2009
Northstar Corridor Opens

TKDA completes track design and construction management for the Northstar Corridor Commuter Rail System, a commuter line within an existing freight railroad corridor. The Northstar Corridor opened on November 16, 2009. It is approximately 40 miles in length and extends from Minneapolis to Big Lake, Minnesota.

2010
100 Years!

TKDA celebrates 100 years of service!

2012
Deitner Becomes President/CEO

William Deitner is appointed President and becomes TKDA’s President/CEO. 

Under his leadership, TKDA has greatly increased in stock price value, grown staff count and opened new offices across the country to serve our clients from border to border, coast to coast.

2012
SJA Acquired

TKDA acquires SJA Architects and establishes an office in Duluth, Minnesota.

2012
Photo of solar panels
District Energy Solar Thermal System

TKDA completed planning, design and construction assistance for the District Energy Solar Thermal System, one of the first commercial thermal solar projects integrated into a district heating system in the United States and is the largest project of its type in the Midwest.

2013
Photo of Civil Engineering Building
SustainABILITY Award Received

The University of Minnesota-Duluth’s Civil Engineering Building receives SustainABILITY Award from AIA Chicago and is included in the Top Ten Green Projects by AIA/COTE. TKDA served as the Firm of Record.

2014
Photo of Van White Memorial Boulevard
Van White Memorial Boulevard

Van White Memorial Boulevard receives Engineering Excellence National Recognition Award from ACEC.

2014
Salo Engineering Acquired

TKDA acquires Salo Engineering in Duluth, Minnesota.

2014
Aerial photo of TH 169/I-494 interchange
TKDA & Jacobs Lead Design

TKDA and Jacobs led the design for the new TH 169/I-494 interchange, freeway and local road system. The project receives ACEC/MN Grand Conceptor Award.

2014
Photo of Target Field Station
A Top Project of 2014

Target Field Station named one of Finance & Commerce’s Top Projects of 2014. TKDA provided design for the bridge which supports the light rail transit station and station canopy.

2015
New Office in Northwest

TKDA opens Seattle office to serve our transportation clients in the Northwest.

2015
Aerial photo of Park Rapids Municipal Airport
MCOA Project of the Year

Park Rapids Municipal Airport – Konshok Field receives MCOA Project of the Year for its crosswind runway and lighting project. TKDA provided planning, environmental assessments, design engineering, and construction phase services.

2015
Photo of baseball game at Wade Stadium
Play Ball!

TKDA is part of the team involved in the restoration of Wade Stadium. Located in Duluth, Minnesota, the stadium is one of the last remaining Works Progress Administration ballparks in the country.