GRISWOLD - Town officials and residents interested in learning about a proposed three-part, $15 million bond project are going to be busy in the days leading up to a May 21 referendum.

The projects are replacing the town's overcrowded senior center with a larger one estimated to cost $7.5 million; extending water and sewer lines along Route 164 and a sewer line along Route 201 at a cost of $6 million in order to spur economic development; and converting the town’s three schools to natural gas at a cost of $1.5 million.

The gas conversion project is driving the speedy schedule, First Selectman Todd Babbitt said.

Eversource Energy has paid to extend a gas pipeline from Main Street in Jewett City to the campus where the town’s three schools -- Griswold Elementary, Griswold Middle and Griswold High -- sit. In return for the free pipeline, the town agreed to convert the schools to natural gas for heat and hot water.

If voters approve it, officials want it to be done during summer vacation when it won't disrupt classes. But there's "probably a six-week lead time to order equipment," Babbitt said.

The Board of Selectmen already approved all three projects at its meeting April 23.

On Tuesday, at what's expected to be a heavily attended meeting, the Board of Finance is scheduled to vote on whether or not to give its approval.

That same night, the first of two public hearings will be held on the gas conversion project. The second one will take place a week later on May 7.

At the end of the May 7 public hearing, the School Building Committee is scheduled to vote on forwarding the project to the Board of Education. The school board would then meet the same night and vote on the project as well.

If that's not a crowded enough schedule, a public hearing on the sewer line project will take place Wednesday.

A town meeting, required before a referendum can be held, hasn't been scheduled yet, but possibly could take place May 14, Babbitt said.

Three separate referendum questions are planned.

"It's an aggressive schedule, but we had no choice," Babbitt said.