Current Events


The mission of our Cooperative Weed Management Area, as agreed upon by all partners, is to protect and restore habitat through the cooperative identification and management (suppression, control, or eradication) of noxious and exotic invasive plants in the Sinnemahoning Creek Watershed.

The stated goals of SIPMA are...

  • Create a sustainable coordinator position to manage and secure funding for projects
  • The early detection and rapid response to control noxious and invasive plant invaders in the watershed
  • Create a watershed database

Education and outreach to members of the general public who live in the CWMA.

Invasive and noxious plant species are a growing threat to biodiversity in the hardwood forests of Northern Central Pennsylvania, but it is still possible to control many species that are not yet common or widespread. The SIPMA is working on early detection/rapid response on weed populations in the watershed, monitoring treated sites, and educating the general public and landowners about invasive plants. The SIPMA is composed of public agencies, private landowners, and non-profits.

The SIPMA was formed around the work to control mile a minute vine (Persicaria perfoliata) in the First Fork of the Sinnemahoning Creek Valley. Other plants we target are Japanese knotweed (Polygonum cuspidatum), Japanese barberry, (Berberis thunbergii), Oriental bittersweet (Celastrus orbiculatus), tree of heaven (Ailanthus altissima) and buckthorn (Rhamnus spp).

Funding sources as varied as the Sinnemahoning Stakeholders Commission to the Western Pennsylvania Conservancy have supported the start up of the organization since 2009. In order to function most effectively, CWMAs usually have an individual who coordinates with the partners and manages the group. In early 2011, funds were granted by the United States Forest Service to hire a CWMA coordinator who is dedicated to implementing the goals of the CWMA partners.


Weed Control Projects Funded By:

  • Pennsylvania Department of Environmental Protection Growing Greener Program
  • Pennsylvania Fish & Boat Commission
  • Seneca Resources
  • Sinnemahoning Stakeholders Commission
  • United States Forest Service
  • Western Pennsylvania Conservancy


Partners in the Sinnemahoning Invasive Plant Management Area


  • Sinnemahoning State Park
  • Sizerville State Park
  • Elk State Forest District
  • Susquehannock State Forest District
  • PA Game Commission
  • PA Department of Agriculture
  • PA Department of Transportation
  • Cameron County Conservation District
  • Elk County Conservation District
  • Potter County Conservation District
  • Penn State University
  • United States Forest Service

Forest Resource Industry:

  • Hancock Forest Management
  • Seneca Resources
  • Forecon Inc.

Nonprofit organizations:

  • Bucktail Watershed Association
  • First Fork Watershed Association
  • Headwaters Resource Conservation and Development Council
  • Upper Allegheny Watershed Association
  • Western PA Conservancy

Sportsman's Organizations:

  • Dallastown Rod & Gun Club
  • East Fork Sportsmen's Club
  • Sinnemahoning Sportsmen's Association

Private landowners:

  • Over 180 private landowners have participated in our work.


© 2012-2015 SIPMA