Pinnacle Engineering was retained by a Class I railroad client to respond to a train derailment at a remote location near the Mississippi River. Access to the derailment was very limited, consisting of a bike trail and a maintenance roadway designed for vehicular, but not construction, traffic. Public roadways leading to the site also were designed for local residential traffic, not heavy construction traffic. The derailment occurred in the spring of the year, and thawing ground increased the impact of construction traffic on the roadways.
As part of its assistance in responding to the derailment, Pinnacle inspected the roadways leading to the derailment site and worked with local contractors to make necessary repairs to ensure that local residents could access their homes safely and efficiently.
Because the bike trail and maintenance roadway were in close proximity to the Mississippi River, stormwater flowing down and across the roadways also had to be managed. Pinnacle designed, deployed, and managed Best Management Practices (BMPs) to minimize the impacts in compliance with the Construction Stormwater Permit.
Pinnacle also retained and worked with a local engineering firm to inventory culverts intersecting the bike trail and maintenance roadway to ensure that they were not damaged or plugged as the result of widening the roadways to accommodate construction traffic to the derailment site. Inventory results were documented, and impacted culverts were either cleaned, repaired, or replaced. Heavy rainfall during the response resulted in many BMPs being overwhelmed and a 72-inch culvert that intersected the maintenance roadway and bike trail washing out. Pinnacle and the local engineering firm teamed to repair the BMPs and guide a local contractor in its replacement of the washed-out culvert and repair of the maintenance road and bike trail in a timely manner.
After the majority of the construction traffic ceased, Pinnacle assessed the condition of the public roadways, the bike trail, and the maintenance roadway leading to the derailment site. Pinnacle documented locations in need of repairs and created repair plans. Pinnacle also identified impacts to a city park which was used for the command center during the response to the derailment, then hired and managed local contractors to complete the repairs and restore the area to pre-derailment conditions.