Evanston Roundhouse Groundwater

The Evanston Roundhouse and Rail Yards Complex (Site), is approximately 22 acres in size and is physically located at 1446, 1448, and 1500 Main Street, Evanston, Wyoming.  The legal description of the Site is the SW¼ of Section 17, Township 15N, Range 120W in Uinta County. 

The existing Roundhouse dates back to 1913 and was used in the heyday of steam locomotives as a repair facility.  Union Pacific Railroad deeded the Site to the City of Evanston in 1972.  Union Tank Car Company conducted railcar maintenance and cleaning at the Site from 1972 until 1994.  In 1997, the City began planning for restoration of historical buildings at the Site.  EPA and WDEQ Brownfields programs have supported environmental investigations and excavation of impacted soils at the Site through the WDEQ/Voluntary Remediation Program.  These efforts have enabled the City to realize some of the economic potential of the Site, while improving the health and well-being of local citizens and the environment.  

Groundwater at the Site is impacted by petroleum hydrocarbon contamination as a result of historical industrial operations at the Site, and was evaluated as a high priority for the Wyoming Department of Environmental Quality/Orphan Site Remediation Program (WDEQ/OSRP).  In 2017, state funds that were allocated to the WDEQ/OSRP were set aside for a groundwater investigation and an interim cleanup remedy at the Site.  The goal is to reduce groundwater impacts and protect Site visitors and workers from exposure to contamination.

WDEQ/OSRP Project Manager:
Sarah Bargsten
(307) 777-2440

Site Documentation Summaries:

  • 1999 Phase I Environmental Site Assessment:  Identified recognized environmental conditions at the Site
  • 2002 Phase II Environmental Assessment:  Analytical results from soil and groundwater sampling effort
  • 2002 Phase IV Planning Document:  Identified nature and extent of soil impacts.  Provided cost estimates for remedial actions.
  • 2007 Brownfield Excavation Report:  Use control area established as an institutional control for Machine Shop soils.  Excavated soils impacted with arsenic and lead.
  • 2015 Investigation Work Plan:  Identified soil and monitoring well locations for addressing site characterization data gaps
  • 2015 Asbestos in Soil Investigation Work Plan:  Protocol for collecting soil samples to be analyzed for asbestos
  • 2015 Quality Assurance Project Plan:  Identified data quality objectives for addressing site characterization data gaps
  • 2015 Health and Safety Plan:  Set forth safety protocol for monitoring well installation and collecting samples at the Site
  • 2016 Site Characterization Report:  Results from soil sampling (including petroleum hydrocarbon constituents and asbestos) and first quarter of groundwater sampling and gauging
  • 2016 March Quarterly Groundwater Sampling Report:  Results from groundwater sampling and gauging
  • 2016 June Quarterly Groundwater Sampling Report:  Results from groundwater sampling and gauging
  • 2016 Remedial Alternatives Evaluation Report:  Evaluated remedial alternatives according to balancing and threshold criteria that will address constituents of concern in soil and groundwater
  • 2017 Implementation Work Plan:  Procedures to conduct activity based sampling for asbestos, LNAPL assessment, LNAPL recovery, and groundwater sampling
  • 2017 Asbestos Activity Based Sampling Report:  Conducted activity based sampling in areas where asbestos fibers in soil were previously detected
  • 2017 Soil Management Plan:  Set forth procedures pertaining to soil disturbing activities at the Site
  • 2017 LNAPL Assessment Report:  Vapor intrusion evaluation, and results from LNAPL recovery pilot test and groundwater sampling


File Date