Saving Rare Plants
Often Public Works projects cannot be completed without removing some
vegetation. In the case of Himalayan blackberries or Scot’s Broom, most
of us are happy to see them go, but sometimes rare plants are close to a
proposed road project. Our first choice is to avoid disturbing areas with
rare plants, especially those on the Threatened or Endangered Species
lists. Often this can be done relatively easily by adjusting the project
during the design stage to avoid those areas, and then cordoning the areas
off so that the construction crew does not inadvertently disturb the
sites.
Occasionally, it is not possible to avoid all disturbance to areas with
rare plants. Then, the Environmental Coordinator will coordinate with the Washington Department of
Natural Resources Natural Heritage Program, the Native Plant Salvage
Project and other agencies to determine the best course of action.
Sometimes, the plants present are not on the Threatened or Endangered
Species lists, but may be uncommon enough that they are worth saving or
protecting. Examples include the Oregon white oaks or some of the prairie
plants found in southern Thurston County. Sometimes plants can be salvaged
from a construction site and replanted at demonstration sites or other
areas where people are trying to restore native vegetation. Sometimes the
salvaged plants can be replanted on the same site after construction, or
used at other Public Works project sites. For plants that do not salvage well,
commercially grown plants can be purchased and planted to help compensate
for the removal of that species. While these alternatives are not perfect,
they can help stop the decline of rare plants.
Road projects can also indirectly affect rare plants. As an example,
the typical grass mixture used for reseeding after construction projects
can grow tall enough that it shades out sun-loving prairie plants. After
we learned this, the grass seed used in prairie areas was changed to a low
growing fescue that is more typical for those areas and won’t compete as
much with the prairie plants. Another advantage is that the roadsides
don't have to be mowed as often, a fact that our overworked mowing crews
appreciate!
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