Wagman Heavy Civil Project

I-270 at Watkins Mill Road Interchange

Posted by Alyssa Girouard
June 2020 Completed Watkins Mill Bridge
June 2020 SB I-270 off-ramp to Watkins Mill
June 2020 Watkins Mill Interchange looking South
June 2020 Watkins Mill Interchange looking South
April 2020 Watkins Mill Bridge over I-270
April 2020 Stream reconstruction north and south of bridge
February 2020 Watkins Mill Bridge over I-270
January 2020 Placement of asphalt for I-270 NB bridge
January 2020 Excavation of floodplain for stream relocation along S14 retaining wall
November 2019 S8 Retaining Wall with drainage inflow under I-270
November 2019 Pouring concrete bridge median on Watkins Mill bridge
October 2019 Erection of MSE panels and stone backfill for S2 retaining wall
August 2019 Installation of tiebacks for temporary shoring
July 2019 Stream and Floodplain restoration
June 2019 Excavation to subgrade for MSE wall construction
June 2019 Aerial View of Project
June 2019 Aerial View of Project
June 2019 Aerial View of Project
June 2019 Aerial View of Project
June 2019 Aerial View of Project
June 2019 Placement of Watkins Mill Bridge Deck
June 2019 Placement of concrete for S12 bridge
June 2019 Concrete deck placement of eastbound Watkins Mill Bridge
June 2019 Placement of concrete deck for Watkins Mill Bridge
June 2019 Fiber reinforced concrete placement for new bridge deck
June 2019 Dryrun of bidwell for eastbound Watkins Mill deck pour
June 2019 Installation of rebar for Watkins Mill Bridge eastbound
June 2019 Installation of MSE panels for S14 retaining wall
June 2019 I-270 & new Watkins mill Bridge looking South
May 2019 Installation of studs and concrete panels for S14 CIP retaining wall
May 2019 Installation of of MSE panels and backfill for S14 retaining wall
May 2019 Installation of manhole and drainage at S14 retaining wall
April 2019 Rebar installation for S12 bridge
April 2019 Erection of structural steel for S4 off ramp bridge
March 2019 Installation of overhangs on S15 retaining wall
March 2019 Completed S12 Watkins Mill Bridge Steel erection
March 2019 Completed S12 steel erection
March 2019 Erection of structural steel over I-270
February 2019 Forming and rebar installation for S7 Retaining Wall
February 2019 Watkins Mill Bridge structural steel installed
February 2019 Installation of structural bolts of steel erection
February 2019 Looking Eastbound
February 2019 Future I-270 Offramp to MD 124
February 2019 Structure Steel Erection
February 2019 Structure Steel Erection
February 2019 Structure Steel Erection
February 2019 Future I-270 Offramp to MD 124
January 2019 Future Ramp I-270 Southbound
January 2019 Future Watkins Mill Bridge
January 2019 Looking North
January 2019 Looking NorthWest
January 2019 Looking South Ongoing Reconstruction
January 2019 Looking South
January 2019 Looking SouthWest
January 2019 Stream Reconstruction Looking North
January 2019 Driving Pile of Retaining Wall
January 2019 Erection of Structural Steel over I-270.
January 2019 Aerial view of the project site.
January 2019 Erection of structural steel for Watkins Mill Bridge
December 2018 Forming bridge abutment for S4 off ramp bridge
November 2018 Pouring Pier 3 cap and beam sets for S12 Watkins Mill bridge
October 2018 Stream and floodplain restoration grading
October 2018 Placing road embankment
October 2018 Forming Pier 2 Caps for S12
August 2018 Aerial view of the project site.
August 2018 Aerial view of the project site.
August 2018 Aerial view of the project site.
August 2018 Wagman and MOSH sign their partnership agreement for the I-270 at Watkins Mill Road Interchange project, which provides a working relationship including training for MOSH personnel to learn more about the construction industry and construction safety. Collectively, we are “working together for a safer Maryland.”
July 2018 S 12 Pier 2 Piling Install
July 2018 S 12 Pier 1 Columns
July 2018 Formwork S4 Abut A
June 2018 S12 Pier 1 Columns
June 2018 Installation of Piling for S12 Pier 4 Median 270
June 2018 Formliner Install for S5 Retaining Wall
June 2018 Concrete Placement S6 Culvert Footing
September 2017 Project Start
September 2017 Project Start
September 2017 Project Start
August 2017 Clearing Trees for Ramp

  • Location

    Montgomery County, MD

  • Duration

    July 2017 – June 2020

The I-270 at Watkins Mill Road Interchange project was an $85 million project for the Maryland State Highway Administration to relieve congestion on one of Montgomery County’s most congested corridors. Construction plans included a new interchange on I-270 consisting of 14 structures, including a five span bridge over I-270 and a two span bridge along an off-ramp.

Key Challenges & Project Details

  • As part of the project scope, the relocation of approximately one mile of 48” waterline and 16” sewer line will be relocated.
  • In addition to the main structures, the project featured two box culverts, a 72” storm drain, and numerous cast-in-place and MSE retaining walls.
  • Extremely environmentally sensitive, the project included the complete reconstruction of a tributary of Seneca Creek, which extends for over a mile throughout the project limits.

Project Fun Facts

  • The project was bid as an A+B, which is a method of bidding that applies a cost per day to the proposed duration to complete the project.

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