2012 Milfoil Remediation

The NHDES continued to monitor Flints Pond throughout 2012. The milfoil that once infested the entire waterbody could only be found in isolated areas and was removed by certified weed control divers. A group of volunteer Weed Watchers were trained to identify invasive aquatic weeds, mark the locations of suspicious plants, and report findingsto NH DES.

The FPIA received $7,500 in Invasive Aquatic Species Control Grant funds from NHDES to be used for an herbicide treatment and/or for Diver Assisted Suction Harvesting (DASH) in 2013. The expenses associated with the restoration work to date have been funded by the Town of Hollis Flints Pond Restoration Capital Reserve Fund, The Flint Pond Improvement Association, and Invasive Aquatic Species Control Grant funds totaling $11,650 from the NHDES.

Monitoring of water quality continues to show significant improvement in 2012:


2012 VLAP Results

-Graphical analysis of 2011 VLAP observed data with 1996-2001 & 2006 baseline



2011 Milfoil Remediation


NHDES monitoring  of the May 31 treatment shows significant reduction in nuisance weeds after two weeks.

Four weeks after treatment, milfoil is now hard to find.  

The FPIA trained for water quality monitoring as part of the Volunteer Lakes Assessment Program and is providing samples for  NHDES testing throughout the summer.

Given the success of the initial treatment, there is no need for a additional remediation in 2011.

NHDES will return to the pond in the fall  for a year-end survey and to make recommendations for 2012.

Monitoring of water quality shows significant improvement after treatement:


2011 VLAP Results

-Graphical analysis of 2011 VLAP observed data with 1996-2001 & 2006 baseline


A Flints Pond Milfoil Primer:

The FPIA has prepared a white paper on milfoil and its impact on Flints Pond.  

VLAP Chemical Parameter Explanation