Yelm receives detailed update on habitat conservation plan, officials outline mitigation costs and timeline

Yelm City Council on May 12 heard a near-complete update on a draft Habitat Conservation Plan (HCP) intended to allow predictable development in the city while offsetting impacts to two prairie species: the Yelm pocket gopher and the Oregon vesper sparrow.

Confluence Environmental project manager Phil Block and senior scientist Eric Doyle presented the plan’s scope, projected impacts and funding mechanism. Block said the HCP ‘‘provides a clear path . . . to account for impacts and to mitigate for those impacts’’ so the city can manage growth while complying with endangered-species rules. Doyle summarized the projection: ‘‘between the two species we have 887 acres that will be impacted over the next 30 years’’ and those impacts translate into about 910 mitigation debits that the HCP must offset.

Why it matters: without an HCP, developers encountering listed species face delays or must prepare their own conservation plans; with an approved HCP the U.S. Fish and Wildlife Service would issue an incidental take permit that standardizes mitigation and permitting for the city.

How mitigation would work: the consultants said restored conservation lands outside the city will generate mitigation credits that can be sold to developers or used for municipal projects. Confluence estimated roughly 480 acres of restored and managed prairie would produce about 950 mitigation credits—enough to cover the projected debits with a safety margin. The consultants proposed acquiring lands in nearby county prairies and restoring them to a higher ecological function to generate credits.

Costs and fees: the presenters estimated a mitigation cost of about $20,000–$22,000 per mitigation-debit acre. As an example, a quarter-acre residential parcel entirely in pocket-gopher habitat would generate about 0.29 mitigation-debit acres and carry an estimated mitigation fee of $5,800–$6,300 at the per-debit rate described. Confluence’s total program estimate was about $21.3 million (2025 dollars), including land acquisition (near $9 million), restoration and management (about $5.2 million), administration and reporting (about $3.7 million) and a 20% contingency.

Timing and next steps: consultants said they expect to produce a draft HCP for public review by late summer and seek U.S. Fish and Wildlife Service approval and an incidental take permit as early as 2027. The public review will include state and federal environmental-review steps (the presenters referenced NEPA and state review) and an opportunity for comment.

Other technical points: the HCP will cover development the city controls inside city limits and in the urban growth area, plus certain municipal maintenance activities; it excludes ordinary single-family residential maintenance and conventional agriculture. Confluence noted that relocation of pocket gophers is not part of the mitigation approach and that the Fish and Wildlife Service prefers acquisition of occupied or suitable prairie lands over relocation.

Next procedural step: staff and consultants said they are working to identify willing sellers for candidate conservation parcels and to refine fee calculations with federal and state agencies. After public review and any revisions, the city would seek final local approval and then federal sign-off to enable permit processing through the HCP.

The council did not take any formal action on the HCP at the meeting; the presentation closed with a public Q&A and a summary of near-term milestones for completing the draft HCP and initiating the public comment period.