B09-Attachment 2 - Revised Final Construction Drawings 2026 08 18 Part1 0002.pdf
Posted: Aug. 26, 2026
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Summary
This **100% Construction Drawings package issued by the National Park Service, U.S. Department of the Interior, for Yellowstone National Park** addresses construction of modular housing for federal partners and replacement of lost Lapeyre housing for park staff at Mammoth, the Northeast Entrance, and Canyon Village.
Dated August 18, 2026, the drawings identify Stantec of Cheyenne, Wyoming, as the architect/engineer firm and list PMIS/Package No. 326141, a project location within the Intermountain Park region of Montana and Wyoming, and 94 total sheets.
The drawing index covers civil, architectural, structural, mechanical, plumbing, fire protection, electrical, telecommunications, utility, grading, demolition, traffic control, and site restoration work, including two-bedroom, accessible two-bedroom, three-bedroom, and accessible three-bedroom modular housing configurations.
The construction requirements include:
- Valid Wyoming and Montana contractor licenses.
- Submission and approval of traffic-control and access plans.
- No on-site contractor camping at Mammoth or the Northeast Entrance.
- Establishment of any contractor housing camp near Canyon Village in accordance with the specifications.
- NPDES permitting and preparation, stamping, implementation, and maintenance of a stormwater pollution prevention plan.
- Utility locating and coordination before excavation.
- Protection and restoration of vegetation.
- Separate stockpiling and reuse of duff and topsoil.
- Approved construction staking.
- Trench safety and shoring.
- Removal or salvage of designated site furnishings.
- Approval of pavement-striping layouts.
Construction zones and staging areas must be fenced. Staging and stockpiling must use previously disturbed areas where practicable, and work must avoid peak visitor impacts, holidays, nighttime work, and weekends unless authorized in writing.
The drawings impose extensive environmental, cultural-resource, and wildlife-protection controls. Wetlands must be flagged, fenced, and avoided, with erosion and sediment controls installed before other land-disturbing activities.
The Canyon road-related wetland impact is covered by a U.S. Army Corps of Engineers Nationwide Permit that must be obtained from NPS and followed. Imported material must be certified weed-free, and equipment must be cleaned to prevent the spread of invasive species.
Work must comply with species-specific measures for Ute ladies’-tresses, yellow-billed cuckoo, grizzly bear, Canada lynx, five-needle pine, Suckley’s cuckoo bumble bee, monarch butterflies, and wolverine.
Vegetation removal is restricted during specified raptor and songbird nesting seasons. Discoveries of archaeological resources require an immediate 300-foot work halt and notification.
Discoveries subject to NAGPRA require all project work to stop and the park archaeologist and coroner to be notified as required by law. Because Mammoth and Canyon Village are hydrothermal areas, work must stop and the Yellowstone National Park geologist and contracting officer must be contacted if large ground holes, standing or flowing non-stormwater, or rotten-egg odors are encountered.
Dated August 18, 2026, the drawings identify Stantec of Cheyenne, Wyoming, as the architect/engineer firm and list PMIS/Package No. 326141, a project location within the Intermountain Park region of Montana and Wyoming, and 94 total sheets.
The drawing index covers civil, architectural, structural, mechanical, plumbing, fire protection, electrical, telecommunications, utility, grading, demolition, traffic control, and site restoration work, including two-bedroom, accessible two-bedroom, three-bedroom, and accessible three-bedroom modular housing configurations.
The construction requirements include:
- Valid Wyoming and Montana contractor licenses.
- Submission and approval of traffic-control and access plans.
- No on-site contractor camping at Mammoth or the Northeast Entrance.
- Establishment of any contractor housing camp near Canyon Village in accordance with the specifications.
- NPDES permitting and preparation, stamping, implementation, and maintenance of a stormwater pollution prevention plan.
- Utility locating and coordination before excavation.
- Protection and restoration of vegetation.
- Separate stockpiling and reuse of duff and topsoil.
- Approved construction staking.
- Trench safety and shoring.
- Removal or salvage of designated site furnishings.
- Approval of pavement-striping layouts.
Construction zones and staging areas must be fenced. Staging and stockpiling must use previously disturbed areas where practicable, and work must avoid peak visitor impacts, holidays, nighttime work, and weekends unless authorized in writing.
The drawings impose extensive environmental, cultural-resource, and wildlife-protection controls. Wetlands must be flagged, fenced, and avoided, with erosion and sediment controls installed before other land-disturbing activities.
The Canyon road-related wetland impact is covered by a U.S. Army Corps of Engineers Nationwide Permit that must be obtained from NPS and followed. Imported material must be certified weed-free, and equipment must be cleaned to prevent the spread of invasive species.
Work must comply with species-specific measures for Ute ladies’-tresses, yellow-billed cuckoo, grizzly bear, Canada lynx, five-needle pine, Suckley’s cuckoo bumble bee, monarch butterflies, and wolverine.
Vegetation removal is restricted during specified raptor and songbird nesting seasons. Discoveries of archaeological resources require an immediate 300-foot work halt and notification.
Discoveries subject to NAGPRA require all project work to stop and the park archaeologist and coroner to be notified as required by law. Because Mammoth and Canyon Village are hydrothermal areas, work must stop and the Yellowstone National Park geologist and contracting officer must be contacted if large ground holes, standing or flowing non-stormwater, or rotten-egg odors are encountered.
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