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| Key Facts |
| Bridge Name | Facility Carried / Feature Intersected | Location | Structure Type | Construction Date and Builder/Engineer | |
|---|---|---|---|---|---|
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East River Road Bridge
| East River Road Over North Hickory Canal | Grosse Ile: Wayne County, Michigan | Concrete Slab, Fixed | 1936 By Builder/Contractor: Unknown |
| Technical Facts |
| Main Span Length | Structure Length | Roadway Width | Main Spans | NBI Number |
| 24 Feet (7.3 Meters) | 64 Feet (19.5 Meters) | 24 Feet (7.3 Meters) | 3 | 82200200000B010 |
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 OnlineNarrative 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. |
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