Tileyard Road over Flint Creek Bridge Replacement

JM Davidson Engineering, D.P.C. (JMD) was subcontracted by Popli Design Group to assist with the hydraulic analysis and environmental permitting for this locally administered federal aid (LAFA) bridge replacement project in Ontario County, New York.  The study bridge carries Tileyard Road over Flint Creek through a rural portion of the Town of Gorham.  The existing bridge is a single span, steel girder bridge, built in approximately 1938.  The bridge is being replaced due to its age and deterioration, as well as its limited hydraulic capacity.  The proposed bridge is wider, allowing for two travel lanes and shoulders, and a slightly higher low chord elevation to improve the bridge hydraulics.

JMD was contracted to perform a hydraulic analysis of Flint Creek in the vicinity of the bridge to conform with both NYSDOT standards and the FEMA criteria necessary for the floodplain development permit, as well as conduct the environmental screening and obtaining permits for the proposed work. 

The work performed includes:

• Conducted a site visit to obtain field measurements of the bridge and hydraulic parameters included in the model.
• Prepared a HEC-RAS model of the existing and proposed bridge to meet NYSDOT hydraulic design criteria as well as performed a no-rise analysis since this project is located within a FEMA floodplain with a floodway.
• Conducted and oversaw the environmental screening necessary for the NYSDOT / FHWA funding approvals including coordination with SHPO, USFWS, NYSDEC Natural Heritage Program, wetland delineation, lead/asbestos/hazardous waste screenings, and other pertinent social and environmental impacts.
• Prepared a hydraulic summary memo and environmental screening text for the Design Approval Document.
• Prepared a No-Rise Certification for the Floodplain Development permit.
• Prepared and coordinated with USACE and NYSDEC for the necessary Section 404 NWP and Section 401 Water Quality Certification permits.