RESOURCE PLANNING


As part of our client-focused approach to environmental planning and compliance processes, ERO provides successful solutions to biological resource issues faced by our public and private sector clients. We conduct resource inventories and impact assessments, negotiate with regulators, develop mitigation plans, and monitor post-project conditions. Our knowledge of natural resource systems, and the associated regulatory processes, results in objective and defensible science-based solutions that we deliver with integrity.


  • Natural resource management planning
  • Regional conservation planning
  • Trail and recreation planning
  • Management policy development
  • Baseline inventory and assessment
  • Public process and facilitation

Areas of Expertise

Natural resource management planning

ERO specializes in the inventory of critical resources, identification of issues and opportunities, and strategic recommendations that balance sometimes-competing objectives in clearly written, situation-specific, and action-oriented plans.

Trail and recreation planning

ERO has considerable experience with on-site trail design, trail planning processes, and trail plans that balance natural resource protection, quality user experience, and community needs.

Baseline inventory and assessment

ERO has completed dozens of baseline inventories and rapid resource assessments in support of conservation easement documentation and open space management planning. ERO’s biologists are well versed in mapping, categorizing, and managing vegetation communities and wildlife habitats.

Regional conservation planning

Ranging from municipal open space to multicounty conservation plans, ERO brings experience developing landscape-scale conservation strategies that are strategic and responsive to the resource values and human communities in the area.

Management policy development

ERO has assisted local governments and management agencies in developing natural resource and public use management policies that are technically sound, relevant to addressing the issues at hand, equitable, and implementable.

Public process and facilitation

As a critical component of most planning projects, ERO has successfully developed and facilitated public processes that are efficient, provide diverse and meaningful opportunities for stakeholder input, and provide decision makers with a clear understanding of the opportunities and trade-offs influencing management decisions.

Resource Planning Leads

Bill Mangle Vice President, Natural Resource Planner ERO Resources Denver CO
Bill Mangle – Principal/Vice President Human Resources
Natural Resource Planner
Bill Mangle Vice President, Natural Resource Planner ERO Resources Denver CO
Bill Mangle – Principal/Vice President Human Resources
Natural Resource Planner

Bill has a broad background in natural resource and open space planning, natural resource assessments, National Environmental Policy Act documentation, and water resource studies throughout Colorado and the intermountain West. He has a sound understanding of environmental and land use planning, natural resource policy, biological sciences, and GIS mapping. This interdisciplinary background of technical and professional skills has enabled Bill to effectively coordinate diverse project teams. Bill’s comprehensive approach to natural resource problems and issues enables him to develop workable and sustainable solutions.

"In presenting this Certificate of Appreciation we would like to thank Ron Beane and Bill Mangle of ERO for their hard work and diligence in writing and completing the HCP document. Without them the successful completion of this HCP would not have been possible."

- Steve Vandiver, General Manager, Rio Grande Water Conservation District, and Terry Ireland, U.S. Fish and Wildlife Service

Email: bmangle@eroresources.com

Aliina Fowler, AICP
Environmental Planner
Aliina Fowler, AICP
Environmental Planner

Aliina joined ERO in 2017, bringing with her considerable experience with the National Environmental Policy Act (NEPA). Aliina’s NEPA experience includes the preparation of categorical exclusions (CatExs), environmental assessments (EAs), and environmental impact statements (EISs) for transportation and energy development projects, including socioeconomic assessments. She also has experience with transportation studies, including long-range transportation plans and pre-NEPA planning efforts. Aliina is adept at working with a range of stakeholders, including multidisciplinary teams, the public, and governmental organizations.

Email: afowler@eroresources.com