TIM GANNON FILE PHOTO | Route 24 in Riverside, where a new ‘Main Street’ is envisioned.
A small sewage treatment plant specifically designed to handle the area between the Riverside traffic circle and nearby Vail Avenue, along with a possible supermarket farther south, would cost about $3.75 million, according to a draft study for a Riverside sewer district that was unveiled last week.
But since only 17 properties would be included in the proposed district, the cost of its operation and maintenance — plus debt service on initial construction costs — figures to be about $4,915 annually per residential property and $11,135 per commercial property. And those numbers are based on the project receiving $3 million in grants from Suffolk County’s alternative on-site sewage disposal system fund, officials said.
The county currently has about $4 million in that fund, said county Legislator Jay Schneiderman (I-Montauk), who represents the Riverside hamlet, the rest of Southampton Town and the South Fork.
Mr. Schneiderman has said in the past he’s confident he could secure a large sum of money for a Riverside plant.
About eight of the 17 parcels in the potential sewer district are residential, according to Mary Anne Taylor of the engineering firm Camp Dresser McGee, which is heading up the $750,000 study for Suffolk County.
“Dividing anything out over 17 properties is a lot of money,” she told those in attendance at last Monday night’s meeting of the Flanders, Riverside and Northampton Community Association in Flanders.
However, if the sewage treatment system does what it’s intended to do, it will help establish additional viable commercial property and attract more businesses to Riverside.
Should that happen, the annual costs would be spread out over a larger base.
The sewer district is considered key to facilitating increased commercial development near the blighted area around the traffic circle, where a high water table and proximity to the Peconic River currently limit what can be built. Locals have long complained that the lack of a business center also contributes to higher property taxes for residential property owners in the area.
With the sewers, county and town officials envision a new Main Street-type commercial strip along Route 24 (Flanders Road), with three-story mixed use buildings along the south side of Flanders Road and a small supermarket near the existing Budget Host Inn — if property owners agree to develop their properties in such a fashion. The vision also calls for a footbridge over the Peconic River to downtown Riverhead.
“Right now, they are dividing numbers out over 17 properties,” Mr. Schneiderman said at the meeting. “But if this new Main Street actually happens, one property might have several storefronts and many apartments above it. And that’s when the numbers start to make sense. If you just left the single-family house there, you wouldn’t want to have that in the sewer district. It looks really expensive for a house.”
The sewer study began about three years ago, when officials initially possibly extending the district as far east as Longneck Boulevard in Flanders. That was found to be too large an area, and likely too expensive a project to ever get funding. So officials, following public meetings with FRNCA members, agreed to shrink the study area to cover just commercial property in Riverside.
But again, that was considered too large and unlikely to get funding. So earlier this year, at Mr. Schneiderman’s suggestion, the study scope was limited to just the south side of Flanders Road between Vail Avenue and the traffic circle and the area near the Budget Host Inn.
A list of potential locations for a sewage treatment plant had originally included about 10 sites, but that was narrowed down to one: an acre of Southampton Town-owned land behind the New York State Police barracks on Riverleigh Avenue.
Linking into existing sewer systems owned by Riverhead Town and Suffolk Community College also was considered, but those options were dropped because of lack of available capacity in those facilities, officials said.
The study is recommending use of a type of sewage treatment plant known as Membrane Bioreactor — and, specifically, the Nitrex system, which the county health department recently approved for use in Suffolk County. The Nitrex system, patented by Lombordo Associates of Massachusetts, requires very little space and has been shown to reduce nitrogen from sewage effluent at rates much better than what’s now required.
Nitrex president Pio Lombardo said in an interview in July that the Suffolk County standard for nitrogen in drinking water is 10 milligrams per liter, but that Nitrex has undertaken projects that brought levels much lower.
“We have a project in Malibu, California, in the low 1’s and we know what to do to get it below 1 [MPL],” Mr. Lombardo had told the News-Review.
All property owners within the proposed district would have to first approve the creation of the district through a referendum, Ms. Taylor said.
From there, environmental impact studies, preparation and approval of the proposed district map, public hearings, development of construction documents, state and county review of the project, lining up of financing and issuing and awarding bids would likely be needed before construction begins, Ms. Taylor said.
“It probably wouldn’t be on line until about 2019,” she said.
“The next step is really up to the community to decide what to do,” she added.
“The purpose of the study was to find out what it would cost,” Mr. Schneiderman said. “Now we know what it costs. We have a very small area that’s being looked at for redevelopment and all those property owners have to now weigh in and see if this is something they want to go forward with.”
Mr. Schneiderman said officials also have to see how much grant money can be acquired for the project.
“That would affect the ultimate costs,” he said. “That’s something I will work hard on.”
Realtor Larry Oxman, who was at last Monday’s meeting representing a property owner in the proposed district, asked if there were any other affected property owners in the audience. There were none.
The complete study can be found online at http://suffolksewerstudy.cdmims.com.