The Three Kids Mine History

Manganese Ore and Nevada

Manganese ore was discovered at the site in 1917, then was mined intermittently from 1942‐1943 and 1953‐1961. Mill operations at the site used a process of acidulation, flotation and sintering. ​ Mine operations caused the site to be contaminated with metals, especially arsenic, lead, and manganese, although these metals are also naturally occurring at the site. After mill operations were terminated in the summer of 1961, mill equipment was auctioned off in January 1962 and secondary lead, a byproduct of the kilns, was transported off the site from 1961 to 1963. The following is a summary of the activities after mill closure.

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First manganese mine site

Read more at The Henderson Historical Society hendersonhistoricalsociety.org/three-kids-mine

flotation cell construction ca 1943
flotation cell construction ca 1943

Flotation cell construction ca 1943

plate 23 water tanks ca 1944
plate 23 water tanks ca 1944

Plate 23 Water Tanks ca 1944

historic from barry 1
historic from barry 1

Installation of the Calciner in the early 1950s

historic from barry 2
historic from barry 2

installation of the Calciner in the early 1950s

  • 1959 – 2004: Manganese nodules that remained from mining operations were stockpiled for government reserves. In 2004, the last of the nodule reserves were moved from the west side of the ore yard to a nearby tailings pond.
  • 1963: People began salvaging equipment at the site as well as illegally dumping waste or vandalizing remaining structures.
  • 1979 – 1984: Dumping activity near the Hulin Pit was permitted by Clark County and continued until 1984. Waste at the pit included construction waste and friable asbestos.
  • 1982: A portion of the privately held land at the site was developed into a boat storage facility (currently known as Lake Mead Boat Storage) and a gas station/convenience store (currently known as Laker Plaza). Other privately owned parcels were purchased by Three Kids Enterprises.
  • 1999: Total petroleum hydrocarbons (TPH) are found exceeding the Nevada soil action level in a portion of the tailings owned by Three Kids Enterprises. The NDEP case remains open at this time.
  • 2007: Lakemoor brings together a public-private partnership with the City of Henderson, NDEP, the Bureau of Land Management (BLM), and the Bureau of Reclamation with a creative win-win solution to remediate the site.
  • 2007-8: Lakemoor completes a comprehensive Phase I Environmental Site Assessment and initial soils testing.
  • 2009: The City of Henderson annexes the project area and establishes the Lakemoor Canyon Redevelopment Area. The property taxes created from the homes built in the Redevelopment Zone will be used over 30 years to reimburse the cleanup costs.
  • 2011: BLM publicly supports the viability of the project by testifying in a U.S. House of Representatives hearing. 
  • 2014: The Three Kids Mine Remediation and Reclamation Act, Public Law 113–135, is signed into law.*
  • 2015: The reimbursement plan for the Redevelopment area is extended from 30 to 45 years to make the project economically viable.
  • 2020-22: Lakemoor conducts remedial site investigations and evaluation of background metals leading to the Corrective Action Plan. A total of 907 soil samples are collected and analyzed. 
  • 2023: Lakemoor completes final documents leading to the transfer of the federal land so work can begin in early 2024. 
  • 2024: PN II Inc., a subsidiary of Pulte Homes, takes over the site and begins the process of remediation and transformation into a residential community.

References Remedial Investigation Report

Auction Flier-Sale of the mill site in January 1962

*The Three Kids Mine Remediation and Reclamation Act, Public Law 113–135, is signed into law.

Three Kids Mine Remediation
and Reclamation Act  

Three Kids Mine Remediation and Reclamation Act – (Sec. 3) Directs the Secretary of the Interior to convey to the Henderson Redevelopment Agency of the city of Henderson, Nevada, all right, title, and interest of the United States of the approximately 948 identified acres of Bureau of Reclamation and Bureau of Land Management (BLM) land within the Three Kids Mine Project Site (the federal land).

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