Flooding on Intervale Road and surrounding streets near the Stamford border should be significantly less when a long-awaited sewer project moves forward sometime this fall, according to public works officials.

Assistant Public Works Director Darren Oustafine said the start of the project was delayed for a redesign after the town was unsuccessful getting some easements needed to cut across properties and install pipe on properties on Devon Road and Intervale Road.

Under the new redesign, a drainage pipe will run off Devon down a higher capacity pipe on Stanley Road down Intervale Road, Oustafine said. The system will drain low lying areas of Devon Road where accumulated storm waters end up flooding properties on adjacent streets, Oustafine said.

Several catch basins at Stanley and Devon will take in flood waters from upper Stanley Road, Oustafine said.

“The only change we made was to intercept more of the water that(comes toward Stanley) and put it in a pipe so less water goes to the houses,” Oustafine said.

The town has funded $1.2 million for the project which will help provide flood relief for homeowners on Devon, Abbey, and Intervale roads, Holmes Avenue, and Rose Lane, where there was significant stormwater damage after intense rain storms, most severely during an April 2007 flood, Oustafine said.

“The new system will now be designed for a 50-year storm where the old system would not even handle a 25-year storm,” Oustafine said. “I know it is woefully inadequate has resulted in numerous flooding events and property damage for homeowners.”

The town is finalizing the location of some of the catch basins on Devon Road and other spots, before putting the project out to bid.

Construction could begin sometime in September, with work expected to continue straight through the winter and last six to eight months, Oustafine said.

“The final paving won’t happen until the spring when the plants open back up,” Oustafine said.

At a recent public information session on the project, Robert Cardone, a resident of Park Lane off Holmes Avenue, raised concerns about the amount of water the project was directing toward Rose Lane into the Noroton River flooding his property.

Just purely as a math problem if you are taking more water and putting it into a river that had problems with what three quarters up into people’s backyards on Park Lane help me understand how I don’t get flooded out?” Cardone said. “To me it seems like you are taking a problem in one place and dropping it on Park Lane.”

Oustafine countered Cardone by stating the drainage project isn’t directing more water into the Noroton River on Rose Lane, but will get it there more quickly.

With increased numbers of intense storms in recent years, Oustafine said the higher capacity will reduce the probability of flooding during heavier periods of rain by draining area streets more quickly before upstream waters in the Noroton River watershed flow through Darien, Oustafine said.

“All the water from this project that will discharge adjacent to your backyard is the same volume of water; it is just getting to the river faster,” Oustafine said. “So if you get flooded by this project you’ll be flooded 10 times worse by the Noroton River.”