Juan Pineda was on his usual lap around the reservoir a few weeks ago when the joke wrote itself. Crews had just pulled the roof and operating house off the top of the outlet tower, the same tower that's stood over the water since the late 1920s. Pineda took off his own ballcap and laughed. "They took the cap off," he said. His wife Glen, who walks the loop often, put it more plainly: it's a little sad to watch the shape change, even if the reason makes sense.
That's the honest version of what's happening at the Lafayette Reservoir this fall. The landmark that's anchored every lap, every fishing trip, every Res Run finish line for generations is being permanently shortened by 40 feet. And almost nothing else about using the reservoir, or about the town's fall calendar, has actually slowed down to make room for it.
Why the Tower Is Coming Down
The tower is the reservoir's spillway and its only drain system, and it was built taller than it needed to be. When the dam's planned height changed during construction, the tower didn't get adjusted to match, so it's spent close to a century standing about 40 feet higher than the reservoir actually requires. After the 2017 Oroville Dam crisis prompted the state's Division of Safety of Dams to tighten seismic standards statewide, engineers evaluated the Lafayette tower and found it could bend or break in a major earthquake, an outcome that could complicate emergency water releases downstream toward Lafayette and Walnut Creek.
That finding is why East Bay Municipal Utility District is shortening the tower rather than replacing the surrounding dam. It's also why this project didn't arrive quietly. Lafayette's City Council pushed back for years, commissioning independent reviews and proposing alternate designs meant to preserve the tower's original silhouette. EBMUD moved forward with the shortening plan anyway, though it did agree to preserve a window dating to the late 1920s from the original structure, and the utility says it's still working out a plan to turn some of the salvaged material into a commemorative keepsake for the community.
What the Construction Actually Costs You Day to Day
Here's the part most residents actually want to know: does this change your Tuesday morning walk?
Mostly, no. EBMUD structured the work to stay out of the way of daily use:
- Construction is limited to weekdays, so weekend visits, including race weekends, see little disruption.
- Debris from the tower demolition is trucked out through the Acalanes Road onramp off Highway 24, which means none of it passes through downtown Lafayette.
- There are no planned vehicular closures tied to the tower work. The Lakeside Nature Trail stays open, though pedestrians may hit occasional 10 to 15 minute delays when crews move equipment across the path.
- Picnic table reservations were paused between February and July 2026 because of the construction footprint. If you tried to book a table this spring and came up empty, that's why. EBMUD says it's releasing select dates back as the schedule firms up.
The one thing that isn't reversible is the tower's height. Crews removed the operating house first, then worked through 13 concrete rings, each about three feet tall, to bring the structure down to size. That phase wrapped up around August 21, so the tower reached its new, shortened height just last week. Work on the new metal operating house continues through November, and the trickiest piece, replacing the underwater slide gates and motor operators, waits for the next permitted construction window in spring 2027. EBMUD expects the tower back in full service by fall 2027.
Two Events That Aren't Waiting on the Tower
If you were bracing for a quiet fall at the reservoir, the calendar disagrees.
The Lafayette Art & Wine Festival returns downtown on September 19 and 20, organized by the Lafayette Chamber of Commerce along Mt. Diablo Boulevard. It's not staged at the reservoir, so the tower work has zero bearing on it. In 2025 the festival drew more than 65,000 people across four music stages, with a Local Artists Alley set up in La Fiesta Square specifically to spotlight Lamorinda-based painters, ceramicists and photographers rather than outside vendors.
The more interesting overlap is the Lafayette Res Run for Education, which runs its in-person race and its virtual Reservoir Challenge from October 10 through 18. The 2025 edition was the 32nd running of the race, and it brought in roughly 2,200 runners and raised $37,611 for local public schools. This October's race will be the first in the event's history where every runner loops beneath a tower that's already sitting 40 feet lower than it's ever been. Three decades of finish-line photos have the same silhouette in the background. This year's won't.
Downtown Filled In While the Tower Was Coming Down
The tower isn't the only thing on Mt. Diablo Boulevard that looks different than it did a year ago.
The Chamber's own list of participants in this year's Taste of Lafayette Restaurant Stroll, held back in May, flagged three names as new for 2026: Local Vines, Tropa and Western Flyer Brewing. That's notable mostly because the Stroll has run for years with a fairly stable lineup of the same downtown regulars. Three new additions in a single cycle is a real shift in what's actually operating along that stretch.
Separately, Brioche de Paris opened in early January at 998 Moraga Road, in the space that had been Hollie's Homegrown, right next to Sideboard. A French bakery with a skylight and counter seating landing on a corner that already had a strong morning lineup adds another reason to be downtown before nine on a weekday.
None of this required the reservoir to be open, undisturbed, or photogenic. It happened on its own timeline, which is worth remembering the next time someone assumes a construction fence means the neighborhood is on pause.
The Season Is Fuller, Not Smaller
Put the two threads together and the picture is less about disruption and more about a town absorbing a permanent change without slowing anything else down. The reservoir's most recognizable feature is 40 feet shorter and staying that way. The festival calendar didn't shrink to accommodate that. The restaurant roster didn't either. If you've lived here through a few autumns, this is the one where the skyline changes but the schedule doesn't blink.
Walk the loop this week if you haven't yet. The new proportions take a second to register, and it's worth seeing before the operating house goes back on top and the whole thing starts to look intentional again.
If you're weighing what a home near the reservoir, or anywhere else in Lafayette, is actually worth this season, the Anthony Riggins Team spends as much time tracking how this town changes as we do tracking its market. Work With Us when you're ready to talk specifics.
