Delaware County Engineer 50 Channing Street Delaware, Ohio 43015
50 Channing Street Delaware, Ohio 43015
Delaware, Ohio 43015
Delaware County Engineer
Red Bank Road Bridge over
The project site is located about 2 miles northeast of Westerville, Ohio on Red Bank (County Road 31) about 1 mile north of Smothers Road.
The existing bridge on Red Bank Road over Hoover Reservoir was built in 1954 as part of the original construction of Hoover Reservoir. The bridge is a three-span steel beam bridge spanning a total of 182 feet crossing Duncan Run, which forms a finger of Hoover Reservoir.
The bridge currently has a number of deficiencies due to its age and normal deterioration over its 50+ year life span. Rehabilitation of the bridge has been identified as a high priority project to ensure that the bridge will continue to serve the growing southeastern Delaware County area.
Road Closure Information:
Design engineering from 2007 to May 2009. Construction from between July and November 2009.
Purpose and Need of the Project:
Summary of Purpose and Need:
The purpose and need of the project is to rehabilitate the existing bridge to provide a safe and efficient crossing for transportation of people, goods and services to area farms, businesses and residences.
Desirable Goals and Objectives:
1. Maintain schedule and budget
2. Minimize impacts to travelling public, neighboring properties and the environment
3. Conform to standard bridge designs
Evaluation of Alternatives:
Conceptual Bridge Alternatives:
Several conceptual alternatives meeting the purpose and need for the project were developed and compared. Only those deemed feasible, both in terms of economic and practical considerations, were advanced further consideration.
Since the roadway work required for each alternative would be nearly identical, the evaluation of alternatives was limited to the bridge, itself.
Listed below is a summary of the conceptual alternatives:
Feasible Bridge Alternatives:
The project team performed a more detailed evaluation of the feasible alternatives to closely examine cost benefit and practicality of each alternative. The two feasible alternatives include replacement of existing deck, beams and pier caps and retrofit of existing abutment walls to a semi-integral design. There is little variation in abutment and deck design, so cost analysis focused on the beam spacing and size.
Listed below is a summary of the feasible alternatives:
Based on evaluation of alternates 4 and 6, it was determined that alternate 6 had a low initial and lower life cycle cost. With no disadvantages compared with alternate 4, this alternative was chosen as the "preferred alternative".
Preferred Bridge Alternative:
The preferred bridge alternative (#6) includes replacement of the bridge superstructure with new 33-inch deep rolled steel beams yielding a minimum deck width of 30-feet to accommodating two 12-foot traffic lanes with 3-foot shoulders. The abutment would be a "semi-integral" design which eliminates the expansion joint at the end of the bridge deck. This is desirable because it eliminates the potential for water leaking through the joint and corroding the steel, as has happened on the existing bridge and many other bridges of similar design. These proposed details would be similar to the bridge on Sunbury Road over Hoover Reservoir constructed in 2006.
Estimated Project Cost:
Questions or Comments?
The Delaware County Engineer would like to hear your opinions about the project. Please contact Rob Riley, Project Manager at 740-833-2400 or send your questions or comments to email@example.com.