Bridgewalk - Noxious Weed Control/Eradication, Boulder, CO

List-A noxious weeds are those that are mandated for eradication by the Colorado Department of Agriculture per the Colorado Noxious Weed Act. The specific List-A noxious weeds at this location include hairy willowherb and yellow flag iris. The location is at the Tantra Environmental Park (drainage easement in Lot 2 in the Walden subdivision near the Bridgewalk apartment complex (602 Walden Cir). Timing of submittals may be challenging as Boulder Housing Partners would like to have an agreement in place by June 1st, 2026. Yellow flag iris is expected to be visible by May but will not flower until mid-June, and hairy willowherb is not anticipated to be visible until mid-June. An image with pinpoints identifying known locations of these species has been provided to help illustrate the extent of infestation and to assist vendors in more accurately estimating the level of effort required for treatment. Please feel free to visit the site to get a better understanding of the area. Treatment work is starting with the growing season of 2026. We realize its likely going to be a few years before all of the weeds can be eradicated and will be starting with a one-year contract with the option to renew for two additional oneyear terms. We will be looking to continue management of these species for multiple years and after the weeds have been eradicated, we will likely continue monitoring the site for a few years to ensure they do not pop up again in which case we will process amendments to the existing contract for any additional services or as things change (depending on effectiveness of treatments).