River Prestress is a national and regional award-winning
leader in the precast/prestressed concrete industry. Since 1958
have produced a wide range of precast/ prestressed concrete products
associated support services. Our well-equipped manufacturing facility
is located at Harrisburg, in the central Willamette Valley of
From this location we serve Oregon, Washington, Idaho, Nevada and California.
Bros. Company was started by the three Morse brothers, Joe, Forrest
and Bill in 1941 as a supplier of sand and gravel from their first pit
in Harrisburg, Oregon. Services and materials offered to the construction
industries expanded to include ready-mix, highway construction services
and material for roads and highways. In 1958 Morse Bros. built its structural
prestressing plant in a nearby field in Harrisburg to supply prestressed
girders for new highway construction throughout Oregon and the Northwest.
and prestressed industry throughout the United States organized and
began developing design, manufacturing and quality standards that are
still today the foundation of all precast/prestressed concrete. This
organization is the Precast/Prestressed Concrete Institute (PCI).
Morse Bros. became one of PCI's earliest certified plants and we remain
one of the major PCI producers in the Northwest. Dick Imper, general
manager in 1994, served as national chairman of PCI. Morse Bros. prestressed
division has been a leader in the northwest in developing and producing
new generations of precast bridge members and other construction products.
Morse Bros. has also been a leader in designing and producing other
concrete products such as precast post-tensioned concrete fluid storage
tanks, frame members and seat riser units for arenas and outside stadiums,
electric power transmission poles, and support structures and enclosures
for industrial process facilities.
Morse Bros. added the current architectural precast and prestressing
plant at the 42-acre Harrisburg facility. Morse Bros. has and continues
to produce architectural precast and/or prestressed concrete building
cladding and framing components as well as moment frame beam/column
components for buildings and elevated parking garages.
the year that Morse Bros. took advantage of an opportunity to broaden
their horizon by becoming a member of the Knife
River Corporation family of companies, a fully integrated independently
managed and operated construction materials and mining company headquartered
in Bismarck, North Dakota. Knife River is part of MDU
Resources Group, Inc. (NYSE: MDU). Knife River operates in Alaska,
Oregon, California, Montana, and Wyoming providing high quality construction
materials and related services.