HomeMy WebLinkAboutTIMBERLINE - INTERNATIONAL - FDP210020 - SUBMITTAL DOCUMENTS - ROUND 1 - SUPPLEMENTAL INFORMATION (2)Weed Mitigation BMPs
Noxious weeds are common in urban and developed areas, and construction-related ground disturbance creates ideal conditions for the spread of noxious weeds. Nevertheless, there are
some general practices that can be followed to limit the spread and/or establishment of noxious weeds during construction activities.
Pre-Construction Phase:
Treat existing noxious weed populations that could be spread by construction activities, especially individual plants and small infestations. Aggressive treatment of existing weed populations
greatly reduces the ability of the weeds to rebound in post-construction conditions.
Requiring equipment (especially dirt-moving equipment like bulldozers and excavators) to be washed and weed-free before entering the Site.
Use only certified weed-free straw and mulch for erosion control projects, including weed-free fiber roll barriers and/or sediment logs.
Seeding, Planting, and Post-Construction Phases:
Obtain soil components, amendments, seed mixes, and mulches from weed-free sources.
Establish and maintain vigorous, desirable vegetation to discourage weeds.
Mulch any non-vegetated surfaces to minimize the amount of noxious weed seeds that will reach the soil surface and germinate.
The NHBZ will be monitored for any weed infestations post-construction and treated appropriately if identified. This will occur twice a year for three years following planting.
The species, location, population size, and treatment method of noxious weeds in the NHBZ will be documented to inform adaptive management practices.
Weed Treatments for Noxious Weeds Identified on Site
Canada Thistle Weed Control
During the project, Canada thistle will be treated with herbicide in the spring and summer to eliminate top growth, followed by a fall application of a translocating herbicide.A Licensed
Pesticide Commercial Applicator will apply herbicide per recommendations provided by the Colorado Department of Agriculture in the ‘Canada thistle identification and management factsheet
(2008).Spot-treatment by mechanical methods may also be implemented, as necessary.
Leafy Spurge Weed Control
During the project, leafy spurge will be treated with herbicide in the spring and summer to eliminate top growth. A Licensed Pesticide Commercial Applicator will apply herbicide per
recommendations provided by the Colorado Department of Agriculture in the ‘Leafy spurge identification and management factsheet’ (2015).Spot-treatment by mechanical methods may also
be implemented, as necessary.