Redevelopment of former Mayflower Mine

About this project

client
Extell Development Company
location
Wasatch County, Utah
completion date
2019

The Mayflower Mine once produced more gold than the rest of the Park City District mines combined. After the Extell Development Company purchased the former mine site to convert it to a ski resort with luxury hotels and residences, it enrolled the site into the Utah Department of Environmental Quality (UDEQ) Voluntary Cleanup Program (VCP) and selected Barr to develop an environmental remediation strategy and an approved remedial action plan for the property.

Work needed to be completed within a short timeframe to keep the project on schedule. We collaborated with the developer’s large design team to incorporate the remedial design into the overall redevelopment plan, protecting human health and the environment without affecting the site aesthetics.

The former mine site had an unstable waste rock pile, widespread lead and arsenic in topsoil, and metals-impacted sediments within drainages and wetlands. Our design included diverting the portal drainage from the wetlands, removing the sediment, and then placing the excavated soil and sediment with waste rock in a repository with a small footprint. We worked closely with the project’s manager and soils engineer to find cost-effective onsite materials unsuitable for construction but useful for the repository.

Although remediating the site was viewed as a complex environmental project, in less than six months, Barr developed a simplified and practical remedial action plan that was approved by the Utah Department of Environmental Response and Remediation (DERR).

Key team members

Dale Kolstad

Vice President
Senior Environmental Engineer

Related Other Sectors projects

Spillway upgrades at St. Cloud Dam
Testing and optimization of fine-tailings drying technologies
Third-party transmission-line construction monitoring
Groundwater monitoring for Fridley Filtration Plant rehabilitation
Investigation and remediation of jet-fuel release
Engineering services and permitting assistance for Bison 2 and 3 wind farms
Geotechnical, structural, and civil work for Canadian wind farm
Redevelopment services for Surly destination brewery
Groundwater modeling for 1,4-dioxane
First-of-its-kind spent-lime stormwater BMP treatment system
Design services for solar generation facility
Albert Lea Lake outlet modifications
Oxbow-Hickson-Bakke ring-levee flood protection
Engineering services for pipeline reversal
Bathymetry and sediment studies for dredging and restoration of Minnesota lake
Environmental integration support for Wamsutter Crude Oil System
Engineering and design for Universal Studios’ rapids ride
Retrofit design for a city-campus parking lot
Greenway design to treat stormwater and mitigate flooding
Inspection, design, and construction oversight for tunnel rehabilitation
Stormwater retrofits along redesigned urban streets
Stormwater treatment wetland for Minnesota college arboretum
Expansion of landfill-gas-fired power generation facility
Sustainable landscape master plan for Minnesota college campus
Installation of new auxiliary boilers for power plant
Permitting and environmental review for pipeline terminal expansion
Earthen embankments reduce flooding and sediment loading in rural creek
Upgrades and expansion for silica-sand wet plant
Reclamation of legacy tailings site
Engineering services for frac-sand operation
Project prioritization tool for Minnesota watershed district
Flood-control modeling and system upgrades in urban neighborhoods
Sustainable site design for watershed district headquarters
Green infrastructure treats stormwater along light rail corridor
Engineering services for municipal wastewater-treatment facility
Powerhouse and turbine replacement at Redwood Falls
Permitting and wetland delineation for a community solar garden
Penstock replacement at McClure Dam
Creation of LID master plan for stormwater management
Demonstration rainwater gardens reduce stormwater runoff
Steam-line evaluation at Rapids Energy Center
Air quality permitting for distributed-generation plant
Discovery Point ecological restoration
Fish-habitat and floodplain restoration of a Minnesota trout stream
Investigation and design for Freeway Landfill
Stormwater basin retrofits for water quality improvement
Engineering design for crude-oil-terminal pipe rack
Self-contained bog built on college roof
Landslide stabilization and corridor repair for state highway
Engineering design for pipeline pump stations and terminals
Tailings-management area design and construction
Gate automation for the Soo Locks compensating works
Natural channel design for aquatic organism passage
Natural stormwater-treatment system and park redevelopment
Engineering and design for SeaWorld’s Infinity Falls water ride
Sweeney Lake and Schaper Pond water-quality improvement
Upgraded levee system manages flood risk for Minot residents
Hall's Island and Scherer site reconstruction
Structural monitoring of sanitary sewer line
Minnetonka Mills Park design
Engineering services for industrial chemicals mine and processing facility
Trona-mining production optimization
Environmental support for post-fire cleanup at industrial facility
Permitting and compliance services for oilseed-processing plant
Remediation and redevelopment of historic dump
Environmental review for peaking plants
Flood risk reduction for North Dakota city
Engineering and design services for new truck dumper
Landscape master plan for Minnesota college campus
Stormwater-basin retrofits improve water quality and habitat
Natural stormwater-treatment system and park redevelopment
Cost analysis for meeting water quality standards
Green infrastructure retrofit of an urban shopping-mall parking lot
Auxiliary boiler installation
Dry Spotted Tail Creek stream restoration
Remediation and residential redevelopment of Whitehall Leather site
Regulatory-compliance assistance for Freeway Landfill
Retrofit engineering for ash conveyance
Hall’s Island redevelopment and restoration
City of New Brighton water treatment plant design
Design and permitting for WISCO Oilfield Special Waste Landfill
Chlor-alkali process design
Support for decommissioning and demolition of manufacturing facility
Option study and design for air jig dewatering system
Permitting, design, and construction oversight for CCR surface impoundment
Brownfields redevelopment for watershed district headquarters
Preliminary design for PFAS-related drinking-water treatment
Renovation of historic Peavey Plaza in downtown Minneapolis
Transmission-line permitting assistance
Air permitting for petroleum refinery’s waxy-crude processing project
Permitting for greenfield renewable diesel production facility in Utah
Permitting for the conversion of a petroleum refinery to renewable diesel production
Preclassification system feasibility study, design, and construction support
Geotechnical investigation for the East Valley Battery Storage Facility
Civil engineering services for 10 MW solar facility
Structural analysis and evaluation of powerhouse
Above-ground tailings management and mine backfill
Crane walk geotechnical engineering at Kings Point wind site
Rushford levee system remediation
Cyclic degradation geotechnical evaluation for wind turbine foundations
Aggregate resource estimate along proposed pipeline routes
PFAS-impacted drinking water response and treatment plant design
Hydrogen generator process skid design
Design of gas storage well pipelines and well pads
Pipeline and facility outage procedure
CFD modeling for spillway replacement
Engineering services for solution mine
Geotechnical engineering and environmental services for oil refinery solar farm
Process and plant design for potash mine
Park and trail conceptual design for the city of Biwabik
Water reuse system design
NEPA support for coal mine expansion
Environmental permitting and engineering design for biomass carbon production
Wind farm repowering structural assessment
Purgatory Park restoration master plan
Landslide stabilization protects architectural treasures
Engineering services for industrial landfill expansion and closure
Air permitting for refinery conversion from petroleum to renewables