GUILDERLAND — The town announced on Nov. 6 that it has received $2.75 million in long-awaited grant money to reduce flooding in homes and yards throughout McKownville by designing and constructing a stormwater-management system.

Most of the homes in McKownville north of Route 20 have had at least some flooding, either indoors or in their yards, with the amounts varying, said town Supervisor Peter Barber this week. In some cases, he said, the flooding has happened even when it is not raining.

This assessment came from a detailed study the town did some years ago, involving interviews with the residents of McKownville. The town has a map that shows the hardest-hit locations, he said.

Many of McKownville’s water pipes are antiquated, and many are located in backyards, Barber said. Sump pumps now drain into the yards, he said, which simply “adds more water to the next person’s property, so it just doesn’t go anywhere.”

The point of the new system, he said, will be to move water out of the area on a more steady basis.

Pipes will be relocated into the town’s right-of-way and upgraded, he said. They will all lead toward a very large pipe that will go under Western Avenue and down McKown Road, before discharging into the Normanskill.

“We did a hydrology report and showed it will have virtually no impact on the Normanskill,” Barber said.

Most of the work to be done will be east of Fuller Road, but repairs will also be made on Providence, Mercer, and Warren streets, all of which are west of Fuller, Barber said.

This work will alleviate to some extent — “not eliminate” — flooding on Route 20 in front of Stuyvesant Plaza, Barber said. This area is notorious for flooding in heavy rains, causing detours away from Route 20, the main street that connects Albany with the suburb of Guilderland.

The flooding on Route 20 “is a question of the undersized drainage pipe that the state has under the highway” that carries water from the McKownville Reservoir, “which is where a lot of the stormwater flows into from Stuyvesant Plaza, Executive Park, even from Crossgates,” said Barber, adding that, when there is a “significant rain event,” the pipes beneath Route 20 “can’t handle it.”

He has raised this problem with state Department of Transportation officials, but says that replacing this pipe will be a “massive undertaking.”

“What we’re doing is redirecting at least some of this water that might otherwise contribute toward that flooding — redirecting it into the new stormwater-management system,” Barber said.

In addition, some of the flooding on Route 20 will be addressed when and if Crossgates Mall becomes the site of a new transit center to be built by the Capital District Transportation Authority. This project is expected to involve moving the Ring Road and putting in two roundabouts, one where the main entrance meets the Ring Road and the other where the Ring Road meets the Northway ramps.

As part of that project, Barber said, the mall’s current stormwater-management system will be relocated and redesigned to handle the water on-site instead of discharging it into the reservoir.

Barber emphasized that, as one way to stretch the grant money that will address flooding in McKownville homes, the town’s highway department will use its newly acquired equipment to pave affected streets.

Design work for the McKownville project will take place over the winter. Construction is to start in June 2018, with completion projected for December 2019.

The $2.75 million in grant money was obtained from the State and Municipal Facilities Program by State Senator George Amedore and State Assemblywoman Patricia Fahy.