A new roof for the Hartwell building and an irrigation system for the playing field next to the Codman Pool make up about half of the dollars requested from the Capital Planning Committee (CapComm) and the Community Preservation Committee (CPC). The items will be put to a vote in three warrant articles at Town Meeting on March 23.

A new roof for the Hartwell building will cost $600,000, comprising the lion’s share of the $875,898 requested by CapComm (see full list below). The CPC is seeking $826,306 for a list of items for recreation, housing, and historic preservation purposes (see below), plus another appropriation of up to $400,000 for the irrigation system. Because that item is large and requires more explanation, it’s been put into a separate warrant article, Parks and Recreation Department Dan Pereira said.

The town eventually plans to install irrigation systems in all of its athletic fields, but it’s starting with Codman field because it’ll be the only one available on campus during the upcoming school renovation project and will thus be very heavily used, Pereira noted. (The central ballfield will be occupied by temporary classrooms, while the field behind Smith will be a construction zone.)

• See a draft of irrigation FAQs from the Parks and Recreation Department

Parks and Rec is asking for up to $400,000, but the actual cost next year may be significantly less than that — it all depends on the water supply that’s found. Engineers have identified several sites on the campus that look promising, but the exact yield of water won’t be known until well-drilling starts.

If a well site close to the Codman field yields enough water for that field and no more, the immediate cost might be only $200,000, Pereira said. If the well doesn’t produce enough water to irrigate on demand, there would be an added cost of about $100,000 for an underground holding tank where water can accumulate.

On the other hand, engineers might locate a single well site that could supply enough water for all the fields. In that case, a larger underground tank would be needed at an additional cost of about $200,000 — but there would be no further costs down the road for digging a second well.

“We would only spend that $400,000 if we got a  great opportunity to save a ton of money later,” Pereira said.

Officials considered using town water but rejected the idea because of cost. The Water Department charges a fee for providing water that’s treated to make it safe for drinking — an unnecessary expense for irrigation water. “If we were paying annual water bills, our budget would be destroyed,” Pereira said. Drilling a well is a one-time expense, and Parks and Rec would pay only for electricity and occasional maintenance in the future.

The department uses town water to moisten the clay tennis courts on the south side of the campus so they don’t dry and dissolve, “but a ballfield needs an inch a week — that’s a mammoth amount of water” in comparison, he said.

After the new Wang field opens this spring and the school project is finished, the town will have enough fields to be able to take one out of service each year to let it rest and let the annual application of grass seed take hold. Having the fields irrigated will also greatly improve the quality of the grass.

To avoid wasting water, moisture sensors in the soil will trigger the irrigation system so the fields get water only when needed, and not in the heat of the day, Pereira said.

Capital Planning Committee requests

Community Preservation Committee requests

(click here for a detailed explanation of each item)