| Project Name | Status | County | Project type | Primary Threat | |
|---|---|---|---|---|---|
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Plum Bush Creek Bridge | Progress | Washington | ||
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Preston Farm | Saved | Larimer | Colorado's Most Endangered | Demolition |
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Purgatoire River Bridge | Progress | Las Animas | ||
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R&R Market | Saved | Costilla | Colorado's Most Endangered | Economic Challenges |
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Rabbit Valley Interchange | Progress | Mesa | ||
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Ralston Cemetery | Saved | Jefferson | Colorado's Most Endangered | Vandalism |
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Red Cliff Arch | Progress | Eagle | ||
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Red Cliff Town Hall | Alert | Eagle | Colorado's Most Endangered | Economic Challenges, Lack of Maintenance, Vacancy |
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Red Mountain Mining District | Saved | Ouray, San Miguel | Colorado's Most Endangered | Natural Elements |
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Redstone Castle | Saved | Pitkin | Colorado's Most Endangered | Demolition |
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Redstone Castle | Complete | |||
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Rehder Block | Active Project | Routt | CPI Easement | |
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Reiling Gold Dredge | Saved | Summit | Colorado's Most Endangered | Demolition by Neglect |
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Rialto Theatre | Saved | Alamosa | Colorado's Most Endangered | Natural Elements |
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Rifle Masonic Lodge | Complete | |||
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Rito Seco Creek Culvert | Progress | Costilla | ||
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Riverside Cemetery | Progress | Adams, Denver | Colorado's Most Endangered | Natural Elements |
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Rock Creek Stage Stop | Saved | Routt | Colorado's Most Endangered | Demolition by Neglect |
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Rouch Gulch Bridge | Progress | Fremont | ||
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Sacred Heart Church | Alert | Costilla | Demolition by Neglect |











