Routt County commissioners table Tailwaters preliminary subdivision amid traffic, wildlife and water-quality concerns

Routt County commissioners on Feb. 4 tabled consideration of the Tailwaters preliminary subdivision, an 89-acre proposal east of the intersection of County Road 16 and 18A at Stagecoach, saying they need more detail on traffic mitigation, wildlife offsets and water-quality monitoring before making a final decision.

The subdivision application would convert 89 acres into a mix of housing and commercial uses: staff said the current preliminary plan proposes 200 residential units (89 single‑family lots, 33 duplex lots (66 units) and 40 multifamily units), a 4.11‑acre commercial area and roughly 33.5 acres of open space (about 40 percent of the site). The plan also includes roughly 6 acres of parkland and an internal network of paved and natural trails and sidewalks; planning staff and the planning commission recommended conditions that would require sidewalks on one side of streets and a number of park elements and water‑quality protections.

Why it matters: The site sits partly within Colorado Parks and Wildlife (CPW) high‑priority habitat for Columbian sharp‑tailed grouse, and the county and applicant disagree about how to offset unavoidable habitat impacts. The proposal also obligates the developer to pay a proportionate share of off‑site road improvements that county staff say are required to maintain levels of service as growth occurs in Stagecoach and nearby areas.

What staff told the commissioners: Planning staff (Alan) summarized the application and the conditions of approval recommended after the planning commission hearing. The presentation said the application was deemed complete before the county’s Unified Development Code (UDC) adoption and therefore is being reviewed under the older zoning and subdivision regulations. Staff noted the planning commission unanimously recommended approval subject to the listed conditions and highlighted several items for the board to resolve, including sidewalks, groundwater monitoring and the developer’s proportionate share of road improvements on County Road 14 and intersections at County Road 16 and 18A.

Traffic and funding: County staff presented a county road study that allocates a proportionate share of planned improvements to anticipated developments. Staff’s calculations identify Tailwaters as responsible for about 15.9% of certain County Road 14 intersection improvements, which staff estimated at a little more than $7.8 million; staff recommended those funds be paid upfront and held in escrow, with an agreement allowing recalculation if other anticipated projects do not proceed and a refund of funds if improvements are not completed by 2040 (condition 22). Staff said the county would manage contributions to produce coordinated, efficient road improvements rather than piecemeal work.

Applicant and consultants’ response: Tim Maguire (principal, Contour Design Collective, representing Tailwaters LLC) and traffic consultant Scott Kilgore (Fox Tuttle Transportation Group) said the county’s County Road 14 traffic impact study projects far more background traffic than the applicant’s study shows and that some land‑use assumptions (notably the trip generation code used for the proposed neighborhood market) are inappropriate for a small‑format commercial node. Kilgore said the applicant’s project includes safety improvements that the developer has already agreed to pay for (including realignment and turnarounds on local roads) and argued the county study inflates Tailwaters’ proportional share by using higher background growth and a commercial trip rate inconsistent with the proposed small commercial building size.

Wildlife and mitigation: Staff and the applicant agreed the entire site falls within CPW high‑priority grouse habitat; staff said on‑site avoidance is not possible and compensatory mitigation is required. The applicant proposed a 1% real‑estate transfer fee as mitigation; staff recommended against that fee because it lacks a demonstrated nexus and pushes mitigation costs onto future homeowners rather than the developer. Staff proposed commissioning a valuation from Earth Economics to estimate the dollar amount needed to offset habitat loss; any required payment would be placed in an account managed by the Ampa Valley Community Foundation and administered by a three‑member oversight board (1 CPW, 1 county representative, 1 at‑large member). Staff said the specific valuation must be completed and approved by the board before plat recording.

Water quality and monitoring: Staff highlighted weaknesses in the applicant’s initial water‑quality testing plan and added a condition (condition 21) requiring a defined monitoring protocol covering surface water (Little Morrison Creek), stormwater and shallow groundwater (up to 30 feet). Condition 25 was added to require additional review of best management practices (BMPs) for water quality at final design. Several public commenters and outside experts asked for stronger, long‑term monitoring and for baseline measurements before construction begins.

Public comment and technical testimony: Dozens of written and in‑person public comments focused on water quality, impacts to Little Morrison Creek and Stagecoach Reservoir, traffic safety and the project’s scale and character. Local residents, a soil and ecosystem scientist, representatives from Morrison Creek Water & Sanitation District and others urged stricter water‑quality safeguards, long‑term monitoring, and caution about impacts to an already‑impaired reservoir. Holly Strablinski (Sharp, Sherman & Engle), representing the applicant, argued condition 22 (the road funding requirement) unduly exceeds the developer’s proportional burden and cited a recent U.S. Supreme Court opinion mentioned in the record; county legal staff said the county applied the rough‑proportionality standard and included refund and adjustment protections in the draft agreement.

Board action: After extended commissioner questions to staff, the applicant and traffic consultants, the Board of County Commissioners moved to table the matter to a date‑specific hearing on March 25 to allow staff and the applicant to return with additional information requested by the board. The board asked staff to return with more detail on: (a) wildlife mitigation options and the proposed conservation‑easement valuation approach (including clearer terms for any fund or oversight board); (b) groundwater monitoring requirements and baseline monitoring protocols; (c) clarification of the County Road 14 proportionality calculations, payment timing options and alternatives considered (phasing, bonding, escrow terms and refund triggers); (d) the commercial area’s potential uses and whether additional review or call‑up should occur at site plan stage; and (e) the land identified for Morrison Creek’s potential acquisition and whether it is developable or in constrained riparian/steep‑slope areas.

Next steps: The board set March 25 as the date certain to resume deliberations. Staff will use the intervening time to provide the additional technical analyses and possible alternative payment mechanisms requested by the board and will coordinate with CPW, Earth Economics (for a valuation if required), Morrison Creek Water & Sanitation District and county public works on the requested materials.

Ending: Commissioners emphasized they were not denying the application but seeking more concrete, enforceable commitments on roads, habitat mitigation and long‑term water‑quality protections before approving a subdivision of this scale in the Stagecoach area.