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Knife River mining expansion prompts neighbor concerns; Planning Commission schedules site inspection
Summary
Knife River asked to expand the Holthaus pit and convert a CUP to an Interim Use Permit; neighbors raised dust, setback and orchard-impact concerns and Knife River described phased mining, screening berms and a voluntary 200-foot undisturbed buffer. The Commission scheduled a site inspection and continued the item to March 5.
Knife River sought an Interim Use Permit and expansion of operations at the Holthaus pit on Feb. 12, prompting multiple neighbors to raise questions about setbacks, dust, access and potential orchard impacts. Planning staff said the 2025 Environmental Assessment Worksheet evaluates a possible expansion onto roughly 111 acres with about 50 acres of potential active mining.
Knife River Environmental Manager Lucy Snowden and Aggregate General Manager John Henry described phased mining and restoration plans, said the company intends to leave the southernmost ~200 feet of the property undisturbed, and explained that berms, dust-suppression water systems and phased restoration would be used to reduce impacts. Henry estimated remaining material volume in the expansion area at roughly 1.6–1.7 million tons and said the company does not plan to restore access on County Road 113 under the current plan; State Highway 25 access would remain primary.
Neighbors, including Tammy Grossinger and the Holthaus family, requested clarification of the westernmost mining limit, asked that the Commission consider orchard flowering weeks and sightline/dust effects, and suggested a site visit for commissioners to view potential impacts. Knife River committed to proactive neighbor communication and said operations would move away from denser residential areas as the plan progresses. Commissioners unanimously approved a motion to conduct a site inspection and continued the matter to March 5; the Commission also set a site-inspection date of Feb. 24 for the broader items that require field review.
