Engineering

Allen Creek Railroad Berm Project

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​​​​Update

Work on the Allen Creek Railroad Berm project reached an exciting milestone on May 12. During a 37-ho​ur period, a cooperative effort by Amtrak and contractors removed the railroad tracks, excavated the site, placed 20 pre-cast concrete culvert sections, backfilled the excavation and replaced the track. This around-the-clock work was completed in time for the Chicago train's evening arrival.​

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Timeline​

​Construction began in April, 2020.​

Estimated completion: Sept-Oct. 2020​
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Project limits

Ann Arbor railroad north of Depot Street. 

Why is this project being done?

This project will lower the floodplain depth at the railroad berm near the mouth of the Allen Creek in the vicinity of Depot ​and Main Street, just west of the Ann Arbor Amtrak Station. In addition, the project will install a large culvert beneath the railroad that will provide safe and legal access from the downtown area to the Border-to-Border Trail.​

Work to be done​

Construction of a flood relief opening in the railroad berm that also provides a new pedestrian path to connect the Depot Street area to the Border-to-Border Trail.  ​

The storm part of the project will consist of the construction of:​ two approximately 200 feet by 12 feet by 7 feet hydraulic box culverts with an outlet to the Huron River, and 286 linear feet of 48-inch pipe storm sewer improvements to reroute the storm drain in Depot St through the new flood relief culverts.  

The pedestrian path will go from the corner of Depot Street and Fifth Avenue , under the railroad tracks in an 85 feet long (14 feet x 12 feet) tunnel, then on new a bridge over Allen Creek, then connect to the Border-to-Border Trail near Argo Dam.​

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Possible impact to residents

The project will have very limited impacts to the public during construction. The majority of work will take place on private property and in the railroad right-of-way.  The railroad will be shutting down for one day in May to allow for construction.  There will be a two week period in June that the block of Depot Street between Main Street and Forth Avenue will be closed for storm drain work.  A one block detour onto Summit Street will occur during this time period. 

Costs and funding source

The total cost of the project is $9.4 million, with 44% coming from city funds. 

  • ​FEMA Pre-Disaster Mitigation Grant: $3.7 million
  • MDOT TAP: $970,000
  • SEMCOG TAP: $315,000
  • MDNR Trust​ Fund Grant: $300,000
  • City of Ann Arbor: $2.9 million (from stormwater funds) + $1.2 million (alternative transportation funds)​

​Materials​



​Project manager:

Brian Slizewski, PE​
Larcom City Hall
Fourth Floor
301 E. Huron Street
Ann Arbor, MI
734.794.6410 ext. 43607
bslizewski@a2gov.org ​