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Mollison Park Monitoring Well: What Changes

Written by Zoe Patterson • Published October 16, 2026 • Last verified October 19, 2026

What you need to know:

The City of Guelph's Water Services Department will install a new groundwater monitoring well in Mollison Park.

Drilling is tentatively scheduled to begin October 26, 2026 and take about three to four weeks, weather permitting.

The grassy area just south of the Tanager Drive entrance will be closed to pedestrians while crews drill.

The well is for measuring groundwater levels and quality, not for supplying drinking water.

Questions go to the city at 519-822-1260 or info@guelph.ca, weekdays 8:30 a.m. to 4:30 p.m.

A groundwater monitoring well is going into Mollison Park. The City of Guelph posted the construction notice on October 16, 2026, and the work belongs to the Water Services Department, which runs the city's drinking water and groundwater programs.

What a monitoring well does is narrow and specific. It is a small pipe set into the ground so staff can measure the water table and test groundwater quality over time. No water is drawn from it for drinking. Nothing gets pumped to homes. The point is measurement, and the readings feed into the city's understanding of how groundwater moves under this part of town.

Mollison Park sits in the city's south end, and park land is often the easiest place to reach an aquifer without tearing up a road or a private yard. That is why wells like this turn up in green space. A drill rig arrives, bores a hole, sets the casing, and seals it. Then the equipment leaves and the site is restored.

The notice gives a tentative schedule: drilling is set to begin October 26, 2026 and is expected to take approximately three to four weeks, weather permitting. No daily work hours are listed. If you live near the park and want firmer timing, the city is the source for that, not this page.

Expect the usual shape of a small drilling job. A rig takes up part of a park entrance or a nearby parking area for a few days. Noise carries. Trucks come and go. The finished well is a low, capped pipe, often flush with the ground or standing a short distance above it, and it stays there for years because the whole purpose is long term sampling.

Who this affects is mostly people who use Mollison Park and the streets around it. Walkers, dog owners, sports groups and anyone cutting through the park could find a section fenced or coned off while the rig is working. Specifically, the grassy area just south of the Tanager Drive entrance will be closed to pedestrians while drilling is underway. Nearby residents may hear equipment during daytime hours. Drivers may find a temporary lane or parking restriction if the rig needs street access.

Access matters more than most people expect. Monitoring wells need to be reachable by city staff for years afterward, so the spot chosen is usually one that stays clear of mowing, play structures and field lines. If a well lands near a path you use, the pipe stays and you walk around it. That is the tradeoff for having the data.

The data itself has a purpose beyond the park. Groundwater readings support decisions about wells, development and how much water can be taken from the ground in a given area. Guelph draws its drinking water from groundwater, so the city tracks levels and quality across a network of monitoring points. Mollison Park is now one more point on that map.

What should you do about it? Not much, unless the work disrupts something you have booked. If your group has a permit for a field or a picnic spot at Mollison Park, check with the city before your date in case the drilling window overlaps. If you live adjacent and the noise or access becomes a problem, call the city instead of waiting it out.

For questions about the project, the city's general line is 519-822-1260, and the general email is info@guelph.ca. City hall at 1 Carden Street takes calls weekdays from 8:30 a.m. to 4:30 p.m. The original notice is short, so if you want details on timing, ask directly and ask for the Water Services Department.

One more thing about the park itself. Mollison Park is a neighbourhood green space in the south end, not one of the river parks, so this work has nothing to do with the Speed or Eramosa corridors or with the trail network that follows them. The Royal Recreation Trail, the Riverside Park splash pad and the Preservation Park boardwalks are all unaffected by this notice.

Construction notices like this one are posted as a courtesy, and they are not permits or approvals. They tell you something is coming. The drilling will happen on the city's schedule, and the notice gives you the contact route if the schedule matters to you. Save the URL if you want to check back for updates.

If you spot fencing or a rig at Mollison Park and wonder what it is, the answer is a groundwater monitoring well for the city's water program. It is small, it is temporary in its construction phase, and the finished pipe is meant to sit quietly for years. Nothing about it changes how the park is used once the crew packs up.

Mollison Park Monitoring Well: What Changes

What you need to know:

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