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Commission pauses 15-foot Prosper Road monument plan, favors trail markers and historic wayfinding signs
Summary
After presentations by stone carvers and staff, the commission agreed not to install a proposed 15-foot 47th Parallel monument in the Prosper Road roundabout and instead to pursue smaller, trail-based markers and a historic wayfinding sign program while addressing safety, utilities and permitting concerns.
Commissioners and stone-carving volunteers discussed a proposed 15-foot carved stone monument for the Prosper Road roundabout to mark the 47th Parallel. The stone-carvers outlined a possible inverted-trapezoid design roughly 15 feet tall with a multi-piece base and cap; they recommended sourcing a large block from a Wilkes quarry and described fabrication and installation logistics.
Transportation staff cautioned that roundabout center islands should prioritize driver focus and safety: features must be "readily appreciated and observable from the outer perimeter of the intersection" and should not invite pedestrian access. Staff also flagged utilities and storm infrastructure in the roundabout center and said large weights would likely require engineered spread footings.
Commissioners and carvers considered alternatives including smaller trail markers, plaques or castings along a proposed Deschutes Valley trail and added wayfinding signs along the historic highway corridor to convey the 47th Parallel concept without creating a potentially distracting roundabout centerpiece. The commission decided to hold off on placing a 15-foot spire in the roundabout and to pursue a work session and follow-up on trail-based interpretive installations and historic wayfinding signage.
