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<br />2 <br /> <br />Howard Strand, Denver Field Branch Manager, 303-293-5026, hstrand@osmre.gov <br /> <br /> <br />5. Purpose of notification. Indicate whether this documentation is to: <br /> invite the ACHP to participate in a Section 106 consultation, and/or <br />Pursuant to 36 CFR 800.13(b)(3) Post-review discoveries if the agency official has approved the <br />undertaking and construction has commenced <br />II. Information on the Undertaking* <br />6. Describe the undertaking and nature of federal involvement (if multiple federal agencies are <br />involved, specify involvement of each): <br /> <br />In 2016, the Office of Surface Mining Reclamation and Enforcement recommended approval for the <br />Assistant Secretary of the Interior for Lands and Minerals of the Mining Plan Decision Document for <br />the Colowyo Mine, Collom Expansion. The Collom Expansion included plans for a new coal haul <br />road. The Assistant Secretary approved the project in 2016. <br />The mine operator, Tri-State, has begun clearing topsoil for the Collom Haul Road and halted work in a <br />30 meter radius around a thermal feature discovered approximately 20 cm below ground surface. The <br />work stoppage is affecting their timeline currently. Tri-State notified the Colorado Division of <br />Reclamation Mining and Safety, as well as the Office of Surface Mining Reclamation and <br />Enforcement on June 26, 2018. <br /> <br />7. Describe the Area of Potential Effects: <br /> <br />The thermal feature is within an area being disturbed for haul road construction within an active coal <br />mine permit area. No cultural resource material was observed at the location prior to commencement <br />of ground disturbance. The initial work is the clearing and stockpiling of topsoil for later reclamation. <br />The feature was discovered approximately 20 cm below ground surface. After topsoil is cleared and <br />stored, the operator will construct a haul road in this location. The site is within the haul road <br />overpass culvert area and will be entirely removed as a result of construction activities. Please see the <br />additional attached documentation for more information. <br /> <br />The following is a general project map from the earlier planning document: