Residents and legislators gathering in front of the Hercules Pavilion across from Stony Brook Village Center had more on their minds than shopping the morning of Aug. 6.

Gloria Rocchio, president of The Ward Melville Heritage Organization, announced at a press conference that Suffolk County awarded the organization a $10,750 grant. The funds will be used for a pilot program to remove 12,000 square feet of phragmites from the shoreline of Stony Brook Creek.

Phragmites, an invasive species plant, has been known to choke many waterways on Long Island. In Stony Brook Creek, the debris caused by the phragmites has created silt buildup, which in turn has caused flooding along the creek.

According to Rocchio, county Legislator Kara Hahn (D-Setauket) secured the grant, and WMHO and Avalon Park & Preserve matched it. The total cost of the project is $21,500.

Rocchio said the problems caused by the phragmites have been going on for years. The town line between Smithtown and Brookhaven goes straight down the creek, and the estuary is owned partially by the two towns, Suffolk County, private residents and not-for-profits, all of which made it challenging to determine who was responsible for it in the past.

WMHO’s president said water goes into and out of the creek twice a day

“There are over 300 acres of land that have runoff on it that empty into this 5-acre creek,” she said.

When the banks of the creek overflow, she said, the water goes into the Stony Brook Grist Mill, which was built in 1751 and is on the National Register of Historic Places. Rocchio said the water that continually flows through the mill every day has destroyed lower parts of the structure as well as its mechanisms.

“We can’t lose this beautiful heritage we have here,” Rocchio said.

She added that residents’ yards have also been flooded and one homeowner had to pull up the level of her bulkhead because the water comes in regularly.

The day before the press conference, workers from North Shore Tree & Landscaping and Usher Plant Care began eliminating the phragmites using a hand cutting process, which involves no chemicals or mechanical equipment. Dr. Richard Rugen, WMHO chairman, explained the procedure.

“The process includes hand cutting of the stalk in a certain way and coming back in two weeks to do a second cutting,” he said. “It’s usually completed within 21 days, weather permitting.”

In addition to the legislators and residents on hand at the press conference, owners and employees of local businesses including Lessing’s Hospitality Group, People’s United Bank, Stony Brook Marine Services, Stony Brook Harbor Kayak & Paddleboard Rentals and Stony Brookside Bed & Bike Inn were in attendance to help remove pilings that floated into the creek and logs from fallen trees to stop further silt buildup.

Michael Lessing, president and chief operating officer of Lessing’s, which owns Stony Brook’s Three Village Inn, said the company’s employees are part of a program called Do Good and have participated in fall beach cleanups at Gilgo Beach, along with other areas on the South Shore. He said when Rocchio heard of their program, she asked for their help to clean up the creek.

“Dan Laffitte and his crew from the Three Village Inn is really what brings us together today,” he said.

Brookhaven Town Councilwoman Valerie Cartright (D-Port Jefferson Station) also spoke at the press conference and said the two-part cleanup project was just the beginning.

The Stony Brook Creek Stormwater Mitigation Project, she said, is set to be voted on by the Suffolk County Legislature this month, adding the county’s Water Quality and Land Stewardship Initiative Committee had recommended the project. Suffolk will contribute $251,526 in funding, while the Town of Brookhaven will match the other $251,526.

Cartright said the project would involve four discharge pipes that carry stormwater from the Stony Brook community directly to the creek, which will be disconnected. A new drainage structure will be installed where pipes will lead to bioretention and water quality units. The goal is to minimize the direct discharge of pollutant-laden stormwater in the creek, she said.

“We have taken a number of steps collectively to make sure we save our Stony Brook Creek and our Stony Brook Harbor,” Cartright said. “As we know they are very special and important to our community.”