Modjeski and Masters to design I Street Bridge’s movable span



Modjeski and Masters has been selected as the engineer of record for the design of the vertical lift span on the I Street Bridge in Sacramento, California. The existing I Street Bridge, first constructed in 1911, is a historic through truss swing bridge. The new bridge structure, owned by the City of Sacramento, will be built upstream of the existing I Street Bridge to enhance accessibility across the Sacramento River.

The new bridge will accommodate three highway traffic lanes, bicycle lanes, pedestrian sidewalks and a future streetcar. The 900-foot bridge will have a 330-foot long multi-modal vertical lift span with segmental concrete approaches.

As a subconsultant to Mark Thomas, Modjeski and Masters will be responsible for the structural, mechanical, and electrical design of the new vertical lift bridge, including the foundations, substructure, towers, lift span, and pier protection systems. TY Lin is the architect on the project.

“The I Street Bridge will offer the surrounding community riverfront access, safe and easier travel across the Sacramento River, and opportunities to increase planned urban development,” says Kevin Johns, Movable Bridge Business Unit Director at Modjeski and Masters. “Our firm has a great deal of experience with vertical lift spans, and we look forward to working with Mark Thomas and TY Lin to apply this knowledge to the I Street Bridge, which will reflect the values and characteristics of the surrounding community.” Preliminary work on the project has begun, and construction is set to begin in 2021.

Modjeski and Masters is a bridge engineering firm with headquarters in Mechanicsburg, PA and other offices in CO, DC, IL, LA, MO, NJ, NY, NC, WV, TX, and Philadelphia. Established more than 125 years ago, the firm is responsible for the design and maintenance of some of our nation’s most recognizable structures. Services include fixed and movable bridge design, inspection and rehabilitation, and all facets of life-cycle maintenance, research, and code development. For more information, visit To learn more about Modjeski and Masters’ work on the I Street Bridge and other moveable bridge projects, visit