Service Description: Northern Colorado Fireshed Feasibility Treatment Areas identifies areas that are treatable by mechanical methods which are defined as areas that have greater than 40% slope, less than 10% canopy cover, and no wildfire or treatment activity within the past 15 years. Treatment acres are subdivided into four categories based on their location: 1) POD boundary treatments to enhance the suppression effectiveness of the feature, 2) roadside treatments to improve ingress, egress, and suppression opportunities, 3) home ignition zone (HIZ) treatments to enhance structure survival probability, and 4) landscape treatments that encompass all treatable areas that don’t fall in the previous 3 categories.
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Description: The overall concepts supporting this analysis and selection of treatment categories are the three pillars of the Cohesive Wildland Fire Management Strategy: Resilient Landscapes, Fire Adapted Communities, and Safe and Effective Wildfire Response. Though there are clear overlaps where treatment categories support multiple Cohesive Strategy goals, they can be subdivided based on their primary outcomes with #1 supporting Safe and Effective Wildfire Response, #2 and #3 supporting Fire Adapted Communities, and #4 supporting Resilient Landscapes.
Methods
Treatment Feasibility and Category Determination
Treatable acres were identified by removing all acres with greater than 40% slope and less than 10% canopy cover based on LANDFIRE 2020. Areas with wildfire activity or treatments within 15 years were also removed from consideration. Although there are scenarios where more frequent retreatment may be desirable, given the needs to prioritize limited funds this analysis focuses on identifying untreated areas. All final decisions are made at the project scale and may include retreatment or treatment of areas otherwise deemed “unsuitable” by this analysis. Once mechanically feasible acres were identified they were split into 4 treatment categories using the following criteria:
1. POD boundary treatments
• Feasible areas within 500 feet on either side of a POD boundary. This buffer distance is likely wide enough to improve suppression opportunities and follows the maximum distance allowed by the Fuel Break Categorical Exclusion established by Section 40806 of the Bipartisan Infrastructure Law.
2. Roadside treatments
• Feasible areas withing 150 feet on either side of all roads.
• Priority is given to POD boundary treatments when they overlap.
3. Home Ignition Zone treatments
• Feasible areas within 300 feet of all structures identified in the Microsoft Buildings dataset.
• This treatment type takes priority over both POD boundary and Roadside treatments.
4. Landscape treatments
• All feasible areas not identified in 1, 2, or 3.
• These areas (and potentially other identified as “infeasible”) are also likely candidates for prescribed fire. When possible prescribed fire treatments should be preferred as they most effectively reduce wildfire hazard and restore forest structure and ecological processes. Additionally, prescribed fire costs tend to be far lower on a per acre basis.
This feature service was created by Alex Heeren and Scott Ritter of the Colorado Forest Restoration Institute in coordination with the Northern Colorado Fireshed Collaborative Operations committee, Peaks to People Water Fund, the Colorado State Forest Service, and Larimer County.
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