The City of Naperville says the Saybrook water main project is still on track to finish by the end of October 2026. That date marks the end of the pipe work, and two more milestones follow it.
The 2026 contract has two deadlines. Substantial completion is Oct. 31, 2026, and final completion is June 30, 2027. The city's Oct. 9 update adds a third piece: landscaping repairs have started and will continue in the spring as needed. That means the excavators leave this month, but the project stays open on the city's books through the next swim season at the Saybrook Bath & Racquet Club on East 12th Avenue.
Three phases, one subdivision
The city split the Saybrook replacement into three phases, and each one covered a different set of streets.
| Phase | Streets | Contract details |
|---|---|---|
| Phase I | 11th Avenue | Year and cost not listed on the city's project page |
| Phase II, 2025 | 14th Avenue, Bayberry Lane, East 12th Avenue, Greenbriar Court, Loomis Street, Tanglewood Lane, Wright Street | 8,200 feet of main; awarded to Miller Pipeline for $3,583,595.97 plus a 3% contingency; approved Dec. 3, 2024 |
| Phase III, 2026 | Barley Avenue, Blue Grass Court, Case Street, East 12th Avenue, Loomis Street, Millet Street, North Brainard Street, North Sleight Street, North Suffolk Street, North Wright Street, Trefoil Court | Awarded to Mauro Sewer Construction for up to $3,678,924.25 plus a 3% contingency, on a 17-month term; approved Jan. 20, 2026 |
The last two phases alone came to about $7.26 million in awarded contracts before contingencies. Three streets show up in both years: East 12th Avenue, Loomis Street and Wright Street. Crews worked on parts of them in 2025 and came back in 2026. The swim club's address, 10 E. 12th Ave., sits on one of those streets. You can see the full Phase II award and the Phase III award in the City Council's Legistar records.
What came out of the ground
The pipe being replaced was installed when Saybrook was young. The Phase III council item describes the old mains as four-inch and six-inch cast iron installed in the 1960s. The Phase II item says the same about that year's six-inch mains.
The new pipe is ductile iron, and it is larger. The two city documents describe the size a little differently. The Phase III council item says eight-inch pipe. The city's current project page says Phase III mains are being "replaced and upsized to an 8-inch or 12-inch ductile iron pipe." The city explains the reasoning on the Water Main Replacement Projects page: replacing aging mains means fewer breaks, more water flow, more reliable service and lower maintenance costs.
The three finish lines, in order
Here is how the end of the project lines up, based on the city's own documents:
- Oct. 31, 2026: substantial completion. The city's Oct. 9 update says Phase III is "still planned to be complete by the end of October 2026." This is when the trenching and pipe work end.
- The following spring: landscaping repairs. The city's Oct. 9, 2026 update says restoration has started and will continue "in the spring" as needed. After the water main work, contractors repair any disturbed concrete or asphalt and cover damaged landscaping with sod, seed or a seed blanket.
- June 30, 2027: final completion. This is the contract's closing date. It fits the 17-month term the council approved in January 2026.
A patch of seed blanket by the curb next spring is part of stage two, inside the contract's window.
What the last few weeks of work look like on the block
For the rest of October, the city's posted rules for active work still apply. Crews generally work Monday through Friday from 7 a.m. to 3:30 p.m. Work sometimes runs past 3:30, but crews are usually gone by 5 p.m.
The city's project page also covers these points:
- Streets: There may be lane and intersection closures during the day, but streets should be fully open by the end of each workday.
- Driveways: The new main runs under the street. Any trench across a driveway is filled with stone and made passable by the end of the workday or sooner.
- The service switch: Once the new main is in, each home has one shutoff of about 30 minutes while its water line moves from the old main to the new one. The city notifies residents in advance and gives 48 hours' notice before any planned shutdown.
- Boil orders: When the main is shut off, the city may issue a precautionary boil order. The city says this does not mean the water tested positive for contamination.
- Discolored water: The switch can stir up sediment. The city's guidance is to run the faucets for a few minutes and clean any aerators.
The city lists Kellyn Powers, Civil Environmental Engineer, as the Saybrook project contact at (630) 305-6201. The city also sends traffic and utility alerts through Naper Notify.
The work that stays nearby
Saybrook's own streets are almost done, but city water work in the area is not. The Ogden and Washington Water Main Replacement, Phase 1, covers Ogden Avenue between Washington and Wright, plus Washington Street between Ogden and Bauer. It replaces cast-iron pipe from the 1950s and 1960s with a 16-inch main. The city's Oct. 8 update puts completion at the end of November, with lane closures and traffic changes until then. That runs about a month past the Saybrook deadline.
Phase 2 is a separate project. It would carry the new 16-inch main west from Ogden and Washington to about 1,000 feet past Mill Street. The city's July 16 update says this work "has been postponed until 2027 due to IDOT permitting and other factors."
So the Ogden corridor gets two construction seasons in a row: Phase 1 into late November 2026, then Phase 2 sometime in 2027 on a schedule the city has not set.
Where the city's attention moves next
The 2027 plan shows where Naperville's main replacement program is headed after Saybrook. City staff previewed a proposed capital program in September, and NCTV17 reported on Sept. 23, 2026 that it includes 6.7 miles of major water main replacement. The city's presentation lists five areas.
| Proposed 2027 project | Estimate | Length |
|---|---|---|
| Cress Creek Phase I | $6.4M | 1.58 miles |
| Bay Colony | $6.2M | 1.77 miles |
| Olympic Terrace | $5.8M | 1.66 miles |
| Ogden Avenue | $5.0M | 0.54 miles |
| Lawnmeadow | $4.0M | 1.15 miles |
Saybrook is not on the list. The list is preliminary: it was a proposal shown at a budget workshop, not an adopted budget, and it can still change. As proposed, though, 2027 puts the trenching in other subdivisions while Saybrook finishes its restoration work. Cress Creek's entry is labeled "Phase I," which points to the same kind of multi-year rollout Saybrook just went through.
For Saybrook, that leaves new mains under the streets, landscaping repairs that can run into spring, and a contract that closes at the end of June 2027.
Utility work like this sometimes comes up when a home is sold, and buyers may ask what was replaced and when. If you're thinking about a move in Saybrook while the restoration wraps up, Bill White Homes can walk you through how a city project at this stage tends to come up in a listing and a negotiation. Get in Touch.
