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East River Road Bridge


East River Road Bridge

Primary Photographer(s): Nathan Holth

Bridge Documented: October 11, 2009
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Key Facts

Facility Carried / Feature Intersected
East River Road Over North Hickory Canal
Grosse Ile: Wayne County, Michigan
Structure Type
Concrete Slab, Fixed
Construction Date and Builder / Engineer
1936 By Builder/Contractor: Unknown

Technical Facts

Rehabilitation Date
Not Available or Not Applicable
Main Span Length
24 Feet (7.3 Meters)
Structure Length
64 Feet (19.5 Meters)
Roadway Width
24 Feet (7.3 Meters)
3 Main Span(s)
NBI Number

Historic Significance Rating (HSR)

Bridge Documentation

View Archived National Bridge Inventory Report - Has Additional Details and Evaluation

This bridge is not the most attractive bridge visually, nor is it the oldest bridge around. However the number of reinforced continuous concrete slab bridges of decent size which retain integrity is relatively low in the state. The Historic Bridge Inventory decided this bridge was eligible for listing in the National Register of Historic Places as a representative example. There are two bridges of this sort on Grosse Ile, both considered historic by the inventory. The bridge does indeed retain good integrity including a marble plaque cast into the guardrails. The guardrail design is plain, but unusual and unlike other bridges in the state. Wayne County Road Commission was noted for being innovative and trying new things, and as such historic bridges in Wayne County often bear little resemblance to bridges built during the same periods in other Michigan counties.

Information and Findings From Michigan Historic Sites Online

Narrative Description

Hickory Island is located near the mouth of the Detroit River. The East River Road Bridge crosses the North Hickory Canal to connect the north end of the island with marshy land at the southeast end of Grosse Ile. The bridge's solid concrete parapet railings, which contain large pebble aggregate, are trimmed near the top edge with an incised horizontal line. A similar line traces the level of the deck on the outside face of the railing. The railing ends curve at a 90-degree angle to follow the wing walls, which are perpendicular to the center line of the bridge. Metal guardrails edging the bridge approaches are attached to the inside ends of the railing. Piers have a row of square-section concrete posts with beveled edges..

Statement of Significance

This bridge was built as part of a project to straighten and widen a section of the south end of East River Road. The road, which had run along the Detroit River, was moved to the west, and the existing timber bridge was removed. Plans for the new bridge were approved by chief designer Julian C. Mead in February 1944. The bridge was apparently not completed until the following year. The Wayne County Road Commission used the continuous concrete slab as a standard bridge plan in the years during and after World War II, presumably in part to minimize the use of steel, which was expensive and difficult to obtain during this period. The commission experimented with different forms for the precast concrete bent piles. On East River Road, the piles were octagon in section. This is one of the bridges that should be considered for National Register designation under Criteria A and C as an example of the evolution of the road commission's bridge design.


Photos and Videos: East River Road Bridge

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