If you haven't walked the Lakeside Nature Trail in the last two weeks, the skyline you remember is already out of date. Sometime around August 21, crews finished cutting the last of thirteen concrete rings off the reservoir's outlet tower, the squat, gazebo-topped structure that has watched over the water since 1929. It is now forty feet shorter than the tower generations of Lafayette residents grew up photographing from the dam.
This is not a rumor picked up from a neighborhood app or a half-remembered city council meeting. It is a documented milestone in a $14 million seismic retrofit that East Bay Municipal Utility District has been planning for years and that most regulars at the reservoir have only experienced as noise, orange fencing, and a longer-than-usual wait to skirt the barge ramp. The tower's new silhouette is permanent. What happens between now and next fall is worth understanding if you use this park the way most Lafayette households do: on foot, several times a week, without giving it a second thought.
Ninety-Seven Years, One Overdue Retrofit
The tower was built taller than it needed to be back in 1929, a leftover from an earlier plan to raise the dam that never happened. For most of its life that extra height was a quirk, not a hazard. Then came the 2017 Oroville Dam crisis, which pushed California's Division of Safety of Dams to tighten seismic standards statewide. Engineering studies on the Lafayette tower found that in a major earthquake it could bend and potentially fail, along with the conduits at its base, which would compromise the dam's ability to manage water safely.
DSOD required EBMUD to fix it. The agency's solution was to shorten the tower by forty feet and reinforce the outlet conduits with new steel pipeline. Construction started in earnest this spring, with crews removing the original operating house first, then sawing through the concrete stem a few feet at a time from a floating work platform. That work reached its target height in the third week of August. A new metal operating house, designed to echo the look of the original, is going up next and is expected to be finished by November. Demolition debris has been trucked out using the Acalanes Road onramp, a routing choice that keeps heavy equipment away from downtown Lafayette entirely.
The Fight Lafayette Didn't Win
None of this happened quietly. A group of Lafayette residents with engineering backgrounds volunteered to review EBMUD's design independently, arguing the tower could meet modern seismic standards without losing its height or its iconic look. They presented their findings to the City Council in the summer of 2023, and the council backed the committee's position, asking EBMUD to reconsider. EBMUD held its ground, telling the city that further public input on the shortened design would not change the outcome and that DSOD's deadlines left little room to negotiate a different concept.
The upshot is a tower that will be structurally sound and, EBMUD says, visually similar to the original once the new operating house is installed, just shorter. Whether that satisfies the residents who spent two years arguing for the taller version is a different question, and one you'll likely hear debated at a Lafayette Chamber mixer before you hear it resolved. Either way, the shape of the thing you've been walking past for years already changed, and it isn't changing back.
What You'll Actually Notice on the Trail Right Now
The reservoir has stayed open through all of this, and there are no vehicle closures planned for the rest of the project. What you will notice depends on where you walk and when:
- Expect occasional ten to fifteen minute pedestrian delays on the paved Lakeside Nature Trail near the barge ramp, where flaggers direct equipment across the path.
- A second, separate project is also underway: EBMUD is replacing the aging sanitary sewer lift station that serves the Visitor Center, Ranger Residence, and Maintenance Building, running from fall 2025 through fall 2026. It has nothing to do with the tower or the reservoir's water quality. It is plumbing for the buildings, not the lake.
- Reservable picnic sites were paused between February and July of this year while the barge and cranes worked offshore. EBMUD has said it will release select dates back as the construction schedule firms up, so if you're planning a group gathering rather than grabbing an open table on a Saturday, call ahead instead of assuming availability.
- First-come, first-served picnic tables and grills away from the construction zone have kept operating normally throughout.
None of this closes the park. It does mean the reservoir you're picturing from a June visit isn't quite the reservoir you'll find on a Tuesday morning in September.
The Loop Gets Booked Out in October
If you're the kind of Lafayette household that already has this on the calendar, skip ahead. If you don't, here's what's coming: the Lafayette Res Run for Education returns on Sunday, October 18, co-sponsored by the Lafayette Chamber and the City of Lafayette.
| Event | Start Time |
|---|---|
| 5K | 8:00 AM |
| 10K | 8:15 AM |
| 2-Mile | 8:45 AM |
There's also a self-guided option called the Reservoir Challenge, open October 10 through 17, where you can run or walk the 2.7-mile paved loop on your own schedule and log it as part of the event. That window closes the day before race day. On October 18 itself, the reservoir will be closed to casual walkers for the timed 10K, so if your routine is a regular morning loop, plan around that one Sunday rather than showing up and being surprised.
Packet pickup happens at the Lafayette Chamber office at 251 Lafayette Circle across several days the week of the race. The event has real stakes for local schools. In 2025 it raised more than $37,600 for participating campuses, with Burton Valley Elementary winning for most registrations and Happy Valley Elementary recognized for the biggest improvement year over year. If your kids attend one of the Lamorinda schools that competes for these totals, this is the week their classroom conversations start mentioning it.
Reading the Clock Before You Lace Up
A few practical notes worth keeping in your back pocket as the season turns:
Park hours shift monthly and matter more once daylight starts shrinking. September runs 6:30 AM to 8:00 PM, and by October that window tightens to 6:30 AM to 7:00 PM. If you've been doing sunset walks on summer hours, adjust or you'll find the gate closing sooner than you expect.
The paved Lakeside Trail allows bikes, roller skates, and scooters only at specific times: Tuesday and Thursday afternoons, and Sunday mornings until noon. Outside those windows, the loop belongs to walkers, runners, and leashed dogs. If you've been dodging cyclists on a weekday morning and wondering why, that's the reason, and it also means those windows are the ones to skip if you're walking with small kids or an easily startled dog.
Anglers should note that EBMUD plants trout from November through March, alongside the reservoir's resident catfish, bass, and sunfish. A California state fishing license plus an EBMUD Fishing Access Permit from the Visitor Center are both required before you cast a line, and that season is closer than it feels in late August.
Parking hasn't changed with any of this: $7 per day or $1 per half hour up to two hours, with annual passes available at $140, or $90 for seniors and visitors with disabilities.
The Same Park, Slightly Different Right Now
The tower will keep changing through the fall as the new operating house goes up, and EBMUD doesn't expect the whole system, including the underwater slide gates and electric motors, to be fully back in service until fall 2027. What's already true today is the part that matters for your next walk: the silhouette is different, the schedule has a few new wrinkles, and one Sunday in October will look nothing like the other fifty-one.
We've walked this loop for years too, long before we ever talked real estate for a living, and we'll keep tracking what changes at the reservoir as the project moves through its next phase. If you're curious about what else is shifting in Lafayette this year, from the Reservoir to the Art & Wine calendar downtown, our Lafayette neighborhood guide is a good place to poke around. And if a conversation about the neighborhood ever turns into a conversation about buying, selling, or just understanding what your home is worth here, Robert Lilley is a phone call away. Schedule a consultation whenever the timing is right for you.
