1923
Design awarded to Modjeski and Moran
New York Governor Alfred E. Smith signed bridge legislation in 1923, appropriating $200,000 to provide surveys, specifications and other preliminary work. The New York State Department of Public Works (now New York State DOT) was charged with the job of constructing the span while the design of the bridge was awarded to Modjeski and Moran.
1925
Construction begins on the historic structure
Construction begins in May 1925 with initial test borings and foundation work. Concrete caissons, patented by Modjeski's parter, Daniel Moran, were sunk 115 feet below water on the western side, and 135 feet below water on the eastern side.
1929
Superstructure Work Begins
After the foundation work was complete, the American Bridge Company started work on the superstructure in April 1929. Construction proceeded smoothly until the superstructure was completed 16 months later.
1930
The Mid-Hudson Bridge Opens to Traffic
The opening day celebration on August 25, 1930 was officiated by then-Governor and Mrs. Roosevelt, former Governor and Mrs. Smith, and Poughkeepsie Mayor Lovelace. Shown here is Mrs. Roosevelt cutton the ribbon on the western side of the bridge along with Ralph Modjeski and Daniel Moran. Ownership of the bridge was transferred to the newly formed New York State Bridge Authority in 1933.
1959
Modjeski and Masters serves as the General Engineering Consultant to the New York State Bridge Authority
Modjeski and Masters was selected to help maintain the Mid-Hudson Bridge and other bridges in their inventory. We performed the first in-depth bridge inspection of the structure. Miscellaneous engineering services were also performed which continue to this day.
1987
Modjeski and Masters leads main cable/suspender rope investigations
Modjeski and Masters has performed the bridge’s main cable inspections since 1987. To date, 100% of each main cable has been unwrapped, wedged, inspected, oiled, rewrapped and painted.
2017
Lighting Design Led by Modjeski and Masters
Modjeski and Masters was asked to provide lighting design services for the bridge. The scope includes the effort required to prepare contract documents suitable for bidding purposes to install lighting for illumination of the north side sidewalk of the Mid-Hudson Bridge meeting ANSI/IESNA RP-8-00 sidewalk illumination standards. This effort includes evaluating options of fixture types, mounting, and circuiting with photometric modeling and calculation producing a report with recommendations.
2020
Modjeski and Masters Performs Biennial Inspections
Modjeski and Masters has performed the bridge’s Biennial Inspections inspections since 1959. Services have included: inspection and evaluation, structural monitoring, concept and detailed design, and non-destructive testing.