OARS Water Chestnut Project

Name: Suzanne Flint  Organization: OARS  Phone: 978-369-3956

Site location:
Assabet River, Hudson through Concord, MA from 42.257690/-71.670746 to 42.466723/-71.356949

Property overview:

Assabet River, from Hudson to Concord, mainly the impounded sections

Management site description:

River

Acres in the management area: 550  Listed on EDDMaps?No

Habitat type: River

Was this Early Detection Rapid Response (EDRR)? No

Target species:
Water Chestnut (Trapa natans)  

Management objectives:

Reduce the populations of water chestnut to levels that can be managed, with relatively low effort, by hand-pulling. Prevent new areas of infestation and prevent the spread from existing areas.

Approximate project start date: June 1, 2016

Project summary:

OARS’ Rapid Response Team for 2016 was hired from June-August to hand pull water chestnut along the Assabet River everywhere that i was found (from Hudson to Concord). Volunteers also engaged in hand-pulling on several impoundment sections of the river in 2016.

Water Chestnut Surveys of Managed Assabet River Sections

 

 

 

Hudson Impound.

2013

2014

2016

       Total area surveyed (acres)

13.9

13.9

13.9

       Calculated total coverage (acres)

0.1

1.9

2.0

       Calculated % of total area covered

1%

14%

15%

Crow Island

 

       Total area surveyed (acres)

39.0

39.0

39.0

       Calculated total coverage (acres)

1.6

1.4

2.4

       Calculated % of total area covered

4%

4%

6%

Powdermill Impoundment, Assabet River, Acton

 

       Total area surveyed (acres)

23.4

23.4

23.41

       Calculated total coverage (acres)

4.6

1.5

3.21

       Calculated % of total area covered

20%

7%

14%

Control method: Manual

Disposal method: Composting off site (away from river edge)

Detailed project timeline:

June-Aug: Survey the sections to be managed before pulling
June-Aug: Repeat hand-pulling every summer with hired help and/or volunteers

Funding sources: 2016 funding came from two Supplemental Environmental Project penalty funds

Final acres in management: 550

Open to the public: Yes