Superfund Sites in Reuse in Utah
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BOUNTIFUL/WOODS CROSS 5TH S. PCE PLUME
The 450-acre Bountiful/Woods Cross 5th S. PCE Plume Superfund site is in Bountiful, Utah. It includes two properties – the 50-acre Hatchco property and the 400-acre Bountiful Family Cleaners property. From 1936 to 1996, businesses on-site included a petroleum facility, a dry cleaner and a trucking business. Over time, spills and leaks from operations and holding tanks contaminated soil and groundwater. The main contaminant at the BFC property was tetrachloroethylene (PCE). The main contaminant at the Hatchco property was trichloroethylene (TCE). PCE is a solvent used by dry cleaners in the cleaning process. TCE is used as a solvent to remove grease from metal parts. EPA added the site to the National Priorities List in 2001. Cleanup included use of barriers, soil vapor extraction system, a water treatment system and long-term monitoring. Construction of the water treatment system finished in 2011. The site is in reuse. The Utah Transit Authority paved part of the Hatchco property to serve as a parking lot for the local commuter rail system. BFC remains active at the site and leases parts of its property to other businesses. Areas affected by groundwater contamination remain in continued industrial, agricultural and residential use. Interstate 15 and rail lines also cross the site.
Last updated October 2025
As of December 2024, EPA had data on 4 on-site businesses. These businesses employed 40 people and generated an estimated $1,877,015 in annual sales revenue. For additional information click here.
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DAVENPORT AND FLAGSTAFF SMELTERS
The Davenport and Flagstaff Smelters Superfund site is near Sandy, Utah. It is in a residential and commercial area at the mouth of Little Cottonwood Canyon. The Davenport, McKay and Flagstaff smelters were active throughout the 1800s. In 1991, the discovery of ladle casts in Little Cottonwood Creek near the Flagstaff Smelter prompted a study of smelter sites in the Salt Lake Valley. Investigations by EPA in 1992 and by the Utah Department of Environmental Quality in 1994 found high levels of arsenic and lead in soil at both smelter locations. EPA added the site to the National Priorities List in 2003. In 2006, under an agreement with EPA and the UDEQ and with the oversight of both agencies, Little Cottonwood Canyon Partners, LLC cleaned up an undeveloped agricultural part of the site for residential redevelopment. In 2011, the UDEQ led the cleanup of a commercial area and undeveloped land designated as a watershed protection zone. All cleanups included the removal and proper disposal of contaminated soils as well as institutional controls to prevent certain land uses and to maintain the protectiveness of the remedy. Land uses on-site include a residential area, a restaurant and the watershed protection zone. In 2018, EPA took the site off the NPL.
Last updated October 2025
As of December 2024, EPA had data on one on-site business. This business employed 96 people and generated an estimated $5,080,000 in annual sales revenue. For additional information click here.
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EMPIRE CANYON
The 36-acre Empire Canyon site is in the headwaters of Empire Canyon, south of Park City, Utah. Starting in the late 1800s, ore mining and processing facilities were on-site. In 2000, a local watershed group found contaminated soils and surface water. In 2003, EPA and a potentially responsible party, United Park City Mines Company, agreed to an Administrative Order on Consent for a short-term removal action. Cleanup included removing contaminated soil, covering areas with clean soil and rerouting surface water. In 2006, EPA and the U.S. Department of Justice negotiated a Prospective Lessee Agreement with DV Luxury Resort, LLC. It provided liability relief for DVLR in exchange for DVLR's help with cleanup. In 2010, DVLR opened the Montage Deer Valley Resort & Spa. It features a spa, restaurants, event spaces and a condominium complex. It offers visitors ski-in and ski-out access during winter months. With help from EPA, DVLR brought sustainable features into all phases of the resort’s creation, from design to construction. DVLR used local building materials during construction and added a 2,800-acre conservation easement around the resort. The resort uses wind-generated power from Utah Blue Sky, has a comprehensive recycling system and provides local jobs. The resort is certified by the U.S. Green Building Council’s Leadership in Energy and Environmental Design program.
Last updated October 2025
As of December 2024, EPA had data on one on-site business. This business employed 500 people and generated an estimated $19,760,000 in annual sales revenue. For additional information click here.
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EUREKA MILLS
The 450-acre Eureka Mills Superfund site is about 80 miles from Salt Lake City, Utah. The site, a historic mining area, includes the town of Eureka and nearby areas. From 1870 to 1958, silver, lead and minerals were mined on-site. Mining activities contaminated soil, surface water and groundwater. EPA added the site to the National Priorities List in 2002. Cleanup included removing contamination from more than 700 residential and commercial properties in Eureka and capping waste piles. EPA’s cleanup planning enabled continued commercial and residential use of the site during cleanup while also ensuring a safe living and working environment. The site also includes parks and public services such as schools and government offices. In 2018, EPA took the site off the NPL.
Last updated October 2025
As of December 2024, EPA had data on 30 on-site businesses. These businesses employed 99 people and generated an estimated $7,863,938 in annual sales revenue. For additional information click here.
For more information:
- Eureka Mills, Eureka, UT - Reuse Plan (PDF)
- Superfund Site Profile Page
Eureka: A Superfund Success Story
FIVE POINTS PCE PLUME
The Five Points PCE Plume Superfund site is in the Salt Lake Valley in Davis County, Utah. An area of contaminated groundwater begins in the town of Bountiful and extends for about a half mile under Woods Cross City and North Salt Lake City. In 1988, Woods Cross City found tetrachloroethylene (PCE) contamination in a drinking water supply well. Investigations found the most likely source of the PCE was a dry-cleaning facility in Bountiful that used PCE in operations from 1964 to 2002. EPA added the site to the National Priorities List in 2007. The Utah Department of Environmental Quality leads investigation and cleanup efforts. EPA selected cleanup activities for the site in 2016. Current data show that contaminated groundwater contamination has decreased. The UDEQ and EPA are assessing the feasibility of groundwater pumping and treatment as an effective method for addressing the retracted groundwater plume. The evaluation is ongoing. The site is in an urban area. Continued site uses include residential and commercial areas.
Last updated October 2025
As of December 2024, EPA had data on one on-site business. This business employed 2 people and generated an estimated $93,000 in annual sales revenue. For additional information click here.
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INTERMOUNTAIN WASTE OIL REFINERY
The 2-acre Intermountain Waste Oil Refinery Superfund site is in Bountiful, Utah. Waste oil processing and chemical blending/shipping operations took place on-site in the late 1950s through the early 1990s. These activities resulted in soil and groundwater contamination. Residents complained of odors, which led to inspections by the Utah Department of Environmental Quality. EPA added the site to the National Priorities List in 2000. Bountiful Irrigation purchased the site property and removed underground storage tanks, containers and debris. The company then built an office with a vapor mitigation system and a large garage on-site. EPA led groundwater treatment efforts for several years and later installed a solar-powered micro-blower on the last well with residual contamination. The UDEQ monitored groundwater for many years. After cleanup, EPA took the site off the NPL in 2020.
Last updated October 2025
As of December 2024, EPA had data on one on-site business. This business employed 9 people and generated an estimated $1,030,000 in annual sales revenue. For additional information click here.
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INTERNATIONAL SMELTING AND REFINING
The 1,200-acre International Smelting and Refining Superfund site is northeast of Tooele, Utah. It is near the mouth of Pine Canyon, which drains into Pine Creek. From 1910 to 1972, the Atlantic Richfield Company (now known as ARCO and owned by BP) operated a copper smelter that also recovered lead and zinc. Smelter operations produced about 650,000 tons of smelter waste and dust. Wind spread contaminants and dust from tailings piles over large areas of surface soil. EPA added the site to the National Priorities List in 2000. Cleanup activities included removal or capping of contaminated soils from the former smelter area (now known as the Pine Canyon Conservation Area), the former Tooele Valley Railroad and residential properties closest to the former smelter area. After cleanup pursuant to a ROD, EPA took the site off the NPL in 2011. The Utah Division of Wildlife Resources manages the Pine Canyon Conservation Area which offers recreation opportunities, including hiking, horseback riding and wildlife observation. Part of the Tooele Valley Railroad cleanup area included the city-owned Oquirrh Hills Golf Course, which remains open today. The former Toole Valley rail line is now a biking and walking trail. Cleanup also enabled the continued use of commercial and residential properties in the area. In January 2024, EPA issued updated lead guidance that lowered the residential screening level for lead at Superfund sites. EPA is evaluating the levels of lead found at the site under this new guidance. EPA and the Utah Department of Environmental Quality will share information on planned activities and results as they become available.
Last updated October 2025
As of December 2024, EPA had data on 3 on-site businesses. These businesses employed 14 people and generated an estimated $110,030 in annual sales revenue. For additional information click here.
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JACOBS SMELTER
The Jacobs Smelter Superfund site includes the town of Stockton, Utah, and surrounding areas. The Stockton area was the center of a silver and base metal mining, milling and smelting district from the 1860s to 1970. The site is named after one of the smelters. Smelter operations contaminated soils with heavy metals. In 1999, EPA began cleaning up the former Jacobs Smelter property and contaminated residential properties. EPA added the site to the National Priorities List in 2000. To manage the cleanup, EPA divided the site into six areas. Cleanup activities include excavation and off-site disposal of contaminated residential soils and capping and covering of non-residential soils. The community of Stockton is in continued use. Other continued uses at the site include a rail line and residential, recreational and commercial areas. Bipartisan Infrastructure Law funding was used to excavate approximately 80,000 tons of soil contaminated with lead and arsenic from both residential and recreational areas in the Waterman Smelter area of Operable Unit 2, with work completed in 2023. The contaminated soil was disposed of off-site, backfilled with clean soil, and revegetated.
Last updated October 2025
As of December 2024, EPA had data on 9 on-site businesses. These businesses employed 50 people and generated an estimated $4,724,992 in annual sales revenue. For additional information click here.
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KENNECOTT (NORTH ZONE)
The Kennecott (North Zone) site is in an industrial area located west of Salt Lake City, Utah. Starting in 1906, predecessors to Rio Tinto Kennecott (Kennecott) processed ores from the Bingham Mining District (now the Bingham Canyon Mine) first shipped by rail then by pipelines. Because of space limitations in the Bingham Mining District, milling, smelting and refining operations were located along the Northern Oquirrh Mountains west of the City of Magna along with other supporting infrastructure. Metals, including copper, gold and silver were produced along with other products over the history of operations which continue today in the same footprints. Operations produced slag, process fluids, mining influenced water and tailings which overtime led to contaminated soil, surface water and groundwater at the various operable units of the Kennecott North Zone. EPA proposed adding the site to the National Priorities List in January 1994. In 1995, EPA, the State of Utah Department of Environmental Quality (UDEQ) and Kennecott agreed that Kennecott would continue specified investigation and cleanup response work and EPA would postpone the site’s listing on the NPL. Kennecott’s response actions have included and continue to include the management of contaminated soils, sediments and solid mine waste pursuant to selected remedies and agreements with EPA. Kennecott is currently re-evaluating groundwater management underlying its North Zone operational facilities and potential impacts in an industrial wetland down-gradient of these facilities. Today, Kennecott continues the processing of ore in the North Zone, derived from its Bingham Canyon Mine in the Kennecott South Zone. The current smelter and refinery and Kennecott’s tailings impoundment are the principal operational facility, along with support infrastructure. Historical and current facilities as they become accessible are demolished, soils and solid mine waste are then characterized to determine if response action is necessary. Interstate 80, state highways and rail lines, along with pipelines for Kennecott’s operations cross the North Zone. The Kennecott North Zone generally supports industrial land uses. The City of Magna was originally a part of the North Zone, but as the result of sampling performed in the mid 1990’s was provided a “No Further Action” status in 2002. Ongoing soil and solid mine waste management by Kennecott continues under sitewide management plans approved by EPA. In addition to response actions under CERCLA, Kennecott’s operational facilities continue to comply with permits issued by the State of Utah to make sure operations do not continue to contribute to legacy mine waste issues. Reuse: Since the mid to late 1990’s, accessible areas around the Kennecott North Zone have continued to be used by the local community and interested stakeholders. In 1997, Kennecott used a combination of land it owned and purchased, located along the south shore of the Great Salt Lake, to create a shorebird and waterfowl reserve. Birding groups, schools and university research teams have coordinated with Kennecott to observe and study wildlife in the reserve. The reserve and other south shore wetlands surrounding the Great Salt Lake have supported habitat for migratory and non-migratory birds and are an important education and scientific resource. The Great Salt Lake, the south shoreline and Great Salt Lake Marina support several recreational activities that visitors engage in, including tourism. Historical communities such as Ragtown, Snaketown and Garfiled have come and gone as mining operations have changed over the years. The City of Magna has grown from a small community initially supporting the mine workers and their families to an expanding community with residential, commercial and industrial development within its boundaries.
Last updated October 2025
As of December 2024, EPA had data on 174 on-site businesses. These businesses employed 2,162 people and generated an estimated $179,242,264 in annual sales revenue. For additional information click here.
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KENNECOTT (SOUTH ZONE)
The Kennecott (South Zone) site is southwest of Salt Lake City, Utah. It covers about 37 square miles. Mining activities at the site began in the 1860s and continue today. Starting in 1906, the Kennecott Utah Copper Company (Kennecott) used the area to extract and process ore to produce a copper concentrate. Wastes from these activities include waste rock, tailings, and mining influenced water, which contaminated soil, groundwater, surface water and sediment. This contamination led to the closure of drinking water wells in the area. EPA proposed adding the site to the National Priorities List in 1994, leading EPA to designate the area as a Superfund Alterative Approach site. In 1999, Kennecott removed more than 25 million tons of contamination. EPA withdrew the site’s NPL listing proposal in 2008 after signing a cleanup agreement with Kennecott. Cleanup included the removal of contaminated soil, sediment and sludge. Groundwater treatment is ongoing. Cleanup has resulted in significant ecological benefits, including the creation of about 1,000 acres of wildlife habitat and open space. The Kennecott Land Company redeveloped 4,126 acres of the site into the Daybreak community. All nearly 4,000 homes and 9.1 million square feet of commercial building space meet EPA’s Energy Star efficiency guidelines. The community also features 1,250 acres of parks, a lake, trails, pedestrian-friendly town centers, shops, restaurants, grocery stores, churches, schools and mass transit. Kennecott’s owner, Rio Tinto, opened a corporate office in Daybreak. Ongoing development in Daybreak includes public transportation corridors, more homes and businesses, and light industry. Agricultural uses in the site area are ongoing. In 2020 and 2021, EPA’s Superfund Redevelopment Program provided support and developed a site management framework guide for EPA and the Utah Department of Environmental Quality. The guide assists with oversight succession planning by the agencies. SRP also developed a reuse guide for the area for prospective developers.
Last updated October 2025
As of December 2024, EPA had data on 197 on-site businesses. These businesses employed 5,621 people and generated an estimated $1,831,011,663 in annual sales revenue. For additional information click here.
For more information:
- Reuse and the Benefit to Community: Kennecott South Zone Superfund Site (PDF)
- Superfund Site Profile Page
MIDVALE SLAG
The 446-acre Midvale Slag Superfund site is in Midvale City, Utah. From 1871 to 1958, five smelters processed lead and copper ore at the site. These operations resulted in toxic levels of heavy metals in area soil and groundwater. EPA added the site to the National Priorities List in 1991. EPA worked with state agencies, the city of Midvale (the City), residents and the property owner to link the cleanup with revitalization and redevelopment goals. Cleanup included soil excavation and removal, smelter waste and slag removal, groundwater monitoring, stabilization of the Jordan River banks and institutional controls. Midvale became the first community in EPA’s Region 8 selected for an EPA Superfund Redevelopment Program pilot project. This led to the creation of the Bingham Junction Reuse Assessment and Master Plan in 2000. In 2008, EPA issued a Ready for Reuse Determination for the site stating that the agency had determined the site was ready for commercial and residential reuse. A Utah Transit Authority light rail station opened on-site in 2011. In 2015, EPA took the site off the NPL; all required cleanup activities are complete. EPA’s Region 8 also recognized the City with its Excellence in Site Reuse award for the locality’s efforts to support reuse and redevelopment at the site. The Midvale Redevelopment Agency reopened Bingham Junction Park in 2016; it offers a softball field, a basketball court, a play structure and a sledding hill. A wetlands mitigation area is also on-site. Twenty-plus years of collaboration and dedication at the local, state and federal levels have transformed this once-contaminated land into a vibrant community resource. Today, the site is home to Bingham Junction, a thriving mixed-use development supporting thousands of jobs. Sections of Bingham Junction’s Riverwalk Park provide community access to the Jordan River. Builders have completed extensive residential development at the site. New buildings include single-family homes, townhomes, condominiums, apartments and assisted living facilities. The area is also home to office buildings, a supermarket and other stores. FL Smidth, an international engineering company, has offices and labs on-site. CHG Healthcare Services developed 283,000 square feet of space. Overstock.com built its headquarters facility on-site, which included a 231,000-square-foot office building, a 50,000-square-foot daycare and fitness studio and a parking structure. In 2024, Overstock sold the office complex to Salt Lake County. Salt Lake County plans to move into the complex in 2026. In January 2024, EPA issued updated lead guidance which lowered the residential screening level for lead at Superfund sites. EPA is evaluating the levels of lead found at the site under this new guidance. EPA and the Utah Department of Environmental Quality will share information on planned activities and results as they become available.
Last updated October 2025
As of December 2024, EPA had data on 64 on-site businesses. These businesses employed 3,181 people and generated an estimated $1,445,188,201 in annual sales revenue. For additional information click here.
For more information:
- Midvale Slag Ready for Reuse Determination (2008) (PDF)
- Cleanup and Mixed-Use Revitalization on the Wasatch Front: The Midvale Slag Superfund Site and Midvale City, Utah (PDF)
- Midvale Slag Reuse Case Study (PDF)
- Redevelopment of the Midvale Slag Superfund Site (PDF)
- Reuse and the Benefit to Community: Midvale Slag (PDF)
- EPA Region 8 Excellence in Site Reuse Award
- Superfund Site Profile Page
Video: From Midvale Slag to Bingham Junction
MONTICELLO RADIOACTIVELY CONTAMINATED PROPERTIES
The Monticello Radioactively Contaminated Properties Superfund site, also known as the Monticello Vicinity Properties, consists of 424 private and commercial properties in and around Monticello, Utah. South of Monticello, a vanadium mill was active from 1942 to 1960. It produced uranium and vanadium for the U.S. nuclear weapons program. Milling activities and improper use of mine tailings caused uranium contamination throughout Monticello. EPA added the site to the National Priorities List in 1986. The U.S. Department of Energy led cleanup activities under an agreement with EPA and the state of Utah. The cleanup included properties within 8 miles of the mill. Property owners beyond that range could choose to have their land tested for cleanup as well. In 2000, the DOE completed the cleanup of all affected properties and EPA took the site off the NPL. The DOE cleaned up many properties for unrestricted use, allowing restoration of many areas to their original uses, such as residential and commercial areas as well as 380 acres of open space. Other uses at the site include neighborhoods, a central commercial district, municipal offices, a U.S. Department of Agriculture office, churches, parks and schools. One part of the site contains residual contamination that does not allow for unrestricted use.
Last updated October 2025
As of December 2024, EPA had data on 98 on-site businesses. These businesses employed 618 people and generated an estimated $44,388,852 in annual sales revenue. For additional information click here.
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MURRAY SMELTER
The 142-acre Murray Smelter site is in Murray City, Utah. This former mineral-processing area was once the largest lead smelter in the country. Testing found contaminated soil, surface water, groundwater and sediment. EPA’s Region 8 and Murray City entered into a unique agreement establishing a formal role for Murray City in planning the site’s cleanup and future use. EPA and Murray City coordinated cleanup and redevelopment planning. Murray City brought together site property owners and the potentially responsible party, ASARCO, to discuss redevelopment. The parties committed to building cleanup structures and following the Murray City General Land Use Plan. Based on outcomes from these discussions, EPA chose a cleanup plan compatible with the site’s anticipated future uses. The site now hosts the city’s largest employer, a hospital, and a major shopping center. In addition, a Utah Transit Authority light rail station with a 300-space parking lot and a designated connector road provides easy access to Salt Lake City International Airport. Several commercial and industrial businesses and a police training facility are also on-site. Site redevelopment awards include a 2006 Phoenix Award and a 2014 State Excellence in Supporting Reuse Award. EPA and Murray City continue to work together to support the safe and beneficial reuse of the site.
Last updated October 2025
As of December 2024, EPA had data on 10 on-site businesses. These businesses employed 7,372 people and generated an estimated $2,201,956,000 in annual sales revenue. For additional information click here.
For more information:
- Reuse and the Benefit to Community: Murray Smelter Superfund Site (PDF)
- Redevelopment of the Murray Smelter Superfund Site (PDF)
- State Excellence in Supporting Reuse Award
- Superfund Site Profile Page
OGDEN RAILROAD YARD
The Ogden Railroad Yard site is on the west side of Ogden, Utah, about 40 miles north of Salt Lake City. The site includes 1,120 acres bounded by the Weber River, the Ogden River and Goode Lake. For over 150 years, a rail yard has been active at the site. Spills and improper handling of hazardous substances resulted in contaminated groundwater, sediment, soil and sludge. EPA began cleanup efforts in 1994. Activities included soil removal, capping and land use restrictions. The Utah Department of Environmental Quality and EPA monitor groundwater as well as the Goode Lake coffer dam, fencing and land use restrictions. EPA worked with the community to make sure future land use considerations were part of cleanup goals. As a result, while cleanup was underway, the Utah Transit Authority built the FrontRunner commuter rail line across the site. Fishing was not allowed at Goode Lake (21st Street Pond) when cleanup work began, as the lake was contaminated. A coffer dam mitigation system was installed at the lake as part of the cleanup. People now use the lake to test water-skiing equipment and for fishing. A walking and biking trail extends around the lake. Historic Union Station, built on-site in 1924, is home to museums, an art gallery, shops and a visitor center. In 2006, the site earned the prestigious Phoenix Award for excellence in site reuse. A railroad service and a scrap metal business are active on-site.
Last updated October 2025
As of December 2024, EPA had data on 4 on-site businesses. These businesses employed 24 people and generated an estimated $2,861,081 in annual sales revenue. For additional information click here.
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PALLAS YARD
The Pallas Yard site is in Murray City, Utah. Union Pacific and the Denver & Rio Grande railroads laid the original Pallas Yard rail lines around the turn of the 20th century. Ore, slag and other smelter by-products containing heavy metals were used, stored and transferred at the site. The heavy metals contaminated soil and groundwater. Utah Transit Authority purchased the site property in 1995 as part of the TRAX Light Rail Transportation Project in preparation for the 2002 Winter Olympics. Cleanup activities included soil removal, the creation of capped on-site repositories, soils left in place under a soil cover, and the placement of sound-muffling berms along the railroad tracks. Groundwater monitoring is ongoing. The UTA continues to inspect and report on site operation and maintenance activities to EPA and the state. The site is an active railroad yard and the UTA uses the site as a thoroughfare for the TRAX Light Rail System.
Last updated October 2025
As of December 2024, EPA did not have economic data related to on-site businesses, or economic data were not applicable due to site use. For additional information click here.
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PETROCHEM RECYCLING CORP./EKOTEK PLANT
The 7-acre Petrochem Recycling Corp./Ekotek Plant Superfund site is in northern Salt Lake City, Utah. From 1953 to 1988, a used oil refinery and oil reclaiming/recycling facility was on-site. Improper and illegal waste management practices led to contamination of groundwater and soil. EPA added the site to the National Priorities List in 1992. Cleanup included removal of contaminated soil and liquid wastes for disposal off-site and the use of natural processes to address groundwater contamination. EPA took the site off the NPL in 2003. Groundwater monitoring is ongoing. The site owner uses the southeast part of the site to store delivery trucks, garbage trucks and truck parts. The owner leases the northwest side of the site to a tire recycling company.
Last updated October 2025
As of December 2024, EPA had data on 2 on-site businesses. EPA did not have further economic details related to these businesses. For additional information click here.
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PORTLAND CEMENT (KILN DUST 2 & 3)
The 71-acre Portland Cement (Kiln Dust 2 & 3) Superfund site is in Salt Lake City, Utah. The Portland Cement Plant deposited about 55,000 cubic yards of cement kiln dust as fill material at the site between 1963 and 1983. CKD and other waste materials at the site contain high concentrations of heavy metals. Disposal practices contaminated soil, air, and groundwater with heavy metals. EPA added the site to the National Priorities List in 1986. Cleanup activities led by EPA, potentially responsible parties and the Utah Department of Environment Quality included the removal, treatment and off-site disposal of contaminated waste. Groundwater monitoring is ongoing. Redevelopment at the site includes a charter school, a boilermaker trade school, a recycling facility, roadways and a high-capacity underground sanitary sewer system. The site is also home to over a dozen commercial and industrial businesses. They range from an indoor sports complex to a landscaping business to a medical device wholesaler.
Last updated October 2025
As of December 2024, EPA had data on 25 on-site businesses. These businesses employed 189 people and generated an estimated $31,874,444 in annual sales revenue. For additional information click here.
For more information:
- Reuse and the Benefit to Community: A Beneficial Effects Economic Case Study for the Portland Cement (Kiln Dust 2 & 3) Superfund Site (PDF)
- Superfund Site Profile Page
RICHARDSON FLAT TAILINGS
The 2,341-acre Richardson Flat Tailings site is near Park City, Utah. Mining activities began in the mining district upgradient from the site in the late 1800s. The site is located in and around Silver Creek, which has been contaminated by tailings and waste rock from past mining processing operations. EPA is working with the Utah Department of Environmental Quality and Natural Resource Damage Trustees to investigate site conditions and evaluate cleanup options. A potentially responsible party cleaned up a former tailings impoundment. The PRP also consolidated and stabilized tailings and restored wetlands. Native plants and animals have returned to these areas. A pond is also on-site. The site remains in recreational and agricultural use. A state park, the Historic Union Pacific Rail Trail, crosses the site. Park City operates a park-and-ride with space for 750 vehicles and a Park City bus service. In 2022, a developer bought part of the site. Redevelopment options are under consideration.
Last updated October 2025
As of December 2024, EPA did not have economic data related to on-site businesses, or economic data were not applicable due to site use. For additional information click here.
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ROSE PARK SLUDGE PIT
The 5-acre Rose Park Sludge Pit Superfund site is in Salt Lake City, Utah. The Utah Oil and Refining Company put contaminated waste in a pit on-site from the 1930s to 1957. Salt Lake City (the City) purchased the property in 1957 and found the waste pit in 1976. EPA added the site to the National Priorities List in 1983. Cleanup included the construction of a containment wall and the capping of waste material. After cleanup, EPA took the site off the NPL in 2003. EPA and the state supported efforts by the city and the responsible party to expand Rosewood Park, a popular community recreation facility next to the site. The effort included putting in exercise equipment and updating sidewalks and landscaping. Today, the park offers a wide range of amenities, including a dog park, multi-purpose sports fields, volleyball courts, a skate park, picnic areas, jogging paths, restrooms and parking areas. In 2024, the Salt Lake City Department of Public Utilities partnered with stakeholders to replace the park’s old tennis courts and open eight new pickleball courts in response to enthusiastic community feedback. In 2025, a $50,000 donation from Goldman Sachs funded the planting of 100 trees to enhance the park’s green space and environmental health.
Last updated October 2025
As of December 2024, EPA did not have economic data related to on-site businesses, or economic data were not applicable due to site use. For additional information click here.
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SHARON STEEL CORP. (MIDVALE TAILINGS)
The 470-acre Sharon Steel Corp. (Midvale Tailings) Superfund site is in Midvale, Utah. A smelting and ore-milling facility produced lead, copper, zinc and other metals on-site from 1906 to 1971. Investigations found contaminated groundwater and soil on the site. EPA added the site to the National Priorities List in 1990. EPA and state-led cleanup activities included fence installation, riverbank stabilization, dust control, building removal, waste capping, groundwater monitoring, removal of contaminated soil and backfilling of dug-up areas with clean soil. Soil cleanup allowed for the continued residential and commercial use of several properties. Cleanup finished in 1999. EPA took the site off the NPL in 2004. Also in 2004, EPA issued a Ready for Reuse Determination stating that the area is ready for residential and mixed reuse. An extension of Bingham Junction Boulevard crosses the site. The Jordan River Parkway Trail runs along its western edge, supporting a variety of non-motorized recreational uses. In 2010, EPA’s Superfund Redevelopment Program and EPA’s Region 8 developed a document to clarify the uses compatible with the capped part of the site. In 2017, KC Gardner, the developer of the adjacent Midvale Slag Superfund site, purchased the undeveloped part of the site for a mixed-use development called Jordan Bluffs. In 2018, the city of Midvale held a groundbreaking event for the project. The 265-acre, master-planned, mixed-use development includes up to a million square feet of office, data center, retail/hospitality and residential areas around a linear park. In 2022, Zions Bank completed construction of a 400,000-square-foot technology campus on-site. The Platinum LEED-certified campus replaces 11 separate buildings that the bank owned or leased in Salt Lake Valley, lowering its energy use by 15%. The campus includes 2,000 solar panels that provide 75% of the electricity used on campus. Redevelopment is ongoing. Land uses on other parts of the site include shopping areas, office space and neighborhoods.
Last updated October 2025
As of December 2024, EPA had data on 149 on-site businesses. These businesses employed 2,463 people and generated an estimated $889,828,945 in annual sales revenue. For additional information click here.
For more information:
- Reuse Fact Sheet: Sharon Steel Corp. (Midvale Tailings) Superfund Site, Operable Unit 1 (PDF)
- Sharon Steel Ready for Reuse Determination (2004) (PDF)
- Superfund Site Profile Page
US MAGNESIUM
The US Magnesium Superfund site is being evaluated within a 5-mile radius remedial investigation study area next to the Great Salt Lake in Tooele County, Utah. In 1972, US Magnesium began magnesium production at the site. The process produced acidic wastes containing organochlorinated compounds that contaminated soil and groundwater. In addition to threatening the health of workers, the contamination posed a threat to birds and other wildlife. EPA added the site to the National Priorities List in 2011. EPA met with interested stakeholders to support the formation of a Community Advisory Group to offer resources to area communities. US Magnesium is a producer of magnesium and more recently, lithium. Magnesium production has been shut down for over 2 years and lithium production also stopped . EPA is investigating the nature and extent of contamination caused by the facility. In 2020, EPA issued a Ready for Reuse Determination for a proposed solar energy project. It stated that about 640 acres of the study area 4-5 miles south of the facility are ready for industrial reuse. In 2021, US Magnesium and EPA reached a settlement. US Magnesium accepted responsibility for reducing contamination levels, treating contamination, and ensuring financial support for the facility’s final cleanup and closure. Bird species such as the Long-billed Curlew and American White Pelican, listed sensitive species in Utah, nest on-site. The Snowy Plover, a threatened species on the federal Endangered Species List, is also present on-site. The largest known concentrations of Snowy Plovers in North America are on the Great Salt Lake. Small areas of habitat around the Great Salt Lake, including the site, are designated as critical-value habitat.
Last updated October 2025
As of December 2024, EPA had data on 2 on-site businesses. These businesses employed 698 people and generated an estimated $155,014,000 in annual sales revenue. For additional information click here.
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UTAH POWER & LIGHT/AMERICAN BARREL CO.
The 2-acre Utah Power & Light/American Barrel Co. Superfund site is in Salt Lake City, Utah. From 1870 to 1987, barrel storage, wood-treating and coal gasification facilities were on-site. Operations produced byproducts such as tar, sludge, ash and liquid wastes. Combined with chemicals from leaking barrels, the byproducts contaminated soil and groundwater. EPA added the site to the National Priorities List in 1989. Utah Power & Light, the site’s responsible party, removed 50,000 barrels, removed contaminated soil and took it off-site for disposal, and built a soil vapor and groundwater extraction system. Remedy construction finished in 1996. EPA approved Utah Power & Light’s request to transition from active remediation to passive remediation in 2007. This concluded soil vapor extraction and groundwater treatment on-site. Monitored natural attenuation of groundwater contaminants is ongoing. Several redevelopment activities have taken place at the site. In 2007, the Utah Transit Authority extended a FrontRunner commuter rail line across the site. In 2009, the UTA also built a transfer station for the commuter rail line on-site. In 2014, a redevelopment company built a 5-story apartment complex on the western side of the site. It has businesses and a non-profit organization on its first floor. In 2022, the UTA opened Folsom Trail, a 1-mile-long paved multi-use path that cuts across the site. The trail connects the Jordan River Parkway Trail to downtown Salt Lake City. Stringent institutional controls at the site continue to restrict the use of contaminated groundwater in the area where homes and businesses are connected to the municipal water system.
Last updated October 2025
As of December 2024, EPA had data on 3 on-site businesses. These businesses employed 8 people and generated an estimated $319,520 in annual sales revenue. For additional information click here.
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WASATCH CHEMICAL CO. (LOT 6)
The 18-acre Wasatch Chemical Co. (Lot 6) Superfund site is in Salt Lake City, Utah. From 1957 through the early 1970s, Wasatch Chemical Company made industrial chemicals on-site. These chemicals included herbicides, pesticides and fertilizers. The company’s waste disposal practices and spills contaminated soil and groundwater. The site is in the center of the Jordan River Valley, above an aquifer that is a regional source of potable water. In June 1986, EPA removed drums and containers from the site. EPA added the site to the National Priorities List in 1991. Cleanup activities included removing and treating contaminated soil and groundwater and putting land and groundwater use restrictions in place. Cleanup finished in 1997. An industrial steel warehouse, plumbing supply warehouse and office buildings are on-site. Monitoring is ongoing.
Last updated October 2025
As of December 2024, EPA had data on 2 on-site businesses. These businesses employed 55 people and generated an estimated $31,063,779 in annual sales revenue. For additional information click here.
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