The Two Calendars Running Through Placentia's Centennial Year

Drive down Golden Avenue right now and you will not get across it. Orange detour signs route traffic onto Rose Drive, Bastanchury Road, or Valencia Avenue instead, and construction fencing wraps the old two-lane crossing over Carbon Canyon Creek. A few blocks away, on the same afternoon, you might pass a banner marking Placentia's 100th year of incorporation, or catch a server at a local pizza spot mentioning a centennial special.

Those two things, the detour and the birthday, are not related by coincidence so much as by timing. Placentia is running two calendars at once this year: one built around a $6 million bridge replacement that has rerouted a chunk of the city since January, and one built around the biggest civic anniversary the town has ever staged. If you live here, understanding how the two overlap tells you more about how to actually spend the rest of 2026 than either calendar does on its own.

A 1934 Bridge Meets a Modern Fix

The Golden Avenue Bridge has carried traffic over Carbon Canyon Creek since 1934, and for most of that time it did the job with two lanes and nothing else, no sidewalks, no bike lanes, just cars, cyclists, and pedestrians sharing the same narrow strip of road. The replacement project, funded through a mix of Measure U, the federal Highway Bridge Program, and congressionally directed spending, broke ground in January 2026 as a roughly $6 million rebuild meant to finally separate those users with real infrastructure.

As of this writing, the bridge is under a full closure in both directions, and the city has posted that closure running through Friday, September 11. The original environmental study for the project estimated the work at about seven months once construction started, so the current end date lands a bit past that early estimate but not wildly outside it. The closed segment runs from California Street to just west of Rose Drive, and through access is still preserved for residents along Navigation Circle even while the main crossing is shut down.

The payoff on the other side is more than a fixed pothole. The new bridge adds wider vehicle lanes along with dedicated sidewalks and bike lanes that were never there before, and it is designed to connect with the recreation trail running beneath it as part of the county's OC Loop Bikeway. Once it reopens, the inconvenience of this summer turns into a genuinely different way to move through that corner of the city, on foot or on two wheels, not just four.

Why This Is the Year the City Slowed Down to Celebrate

Placentia was incorporated on December 2, 1926, and the city has built an entire steering committee, split into five subcommittees, to make sure its hundredth year gets marked properly. As Mayor Chad Wanke put it in the city's own January announcement:

"This centennial is about more than marking a date on the calendar; it's about honoring the generations of residents, leaders, and community partners who helped build Placentia."

City Administrator Jennifer Lampman added that the goal is to create experiences throughout the year that residents will remember, not just a single ceremony. That framing matters here because it explains why the celebration isn't one event in December but a string of them stretched across twelve months, landing right on top of the bridge project's own multi-month timeline.

The city officially turns 100 on December 2, 2026, a Wednesday, with the larger community birthday party and tree lighting scheduled for the following Saturday, December 5, so the actual anniversary and the public celebration bookend the same week.

What's Already Behind Us

A good chunk of the centennial calendar has already played out by early August, and most of it ran without touching the Golden Avenue closure at all.

• January 24: the Mayor's Centennial Gala kicked off the year.
• Six evenings starting June 25: a summer concert series at Tri-City Park, billed as "100 Years of Music," brought crowd-favorite bands to the park at 6:30 p.m. each night.
• June 27: the Centennial 5K Run went from Tri-City Park to Kraemer Memorial Park. The city's own winter newsletter had originally penciled this for May 2, so if you were tracking an earlier date, note that it moved before it happened.
• August 6: the 12th Annual Taste of Placentia filled Tri-City Park from 5 to 9 p.m. with unlimited tastings from local restaurants, breweries, and wineries, live music from 80z All Stars, and DJ Slim Dee spinning in the tasting area. Vendors included Craftsman Wood Fired Pizza, La Cova, and The Old Spaghetti Factory, alongside breweries like Brewery X and Broken Timbers.

None of that required anyone to cross Golden Avenue. The events clustered at Tri-City Park, which sits accessible from the Kraemer Boulevard side of town regardless of the bridge closure.

The Storefronts Are Playing Along Too

The centennial isn't confined to city-run events. The city put out an open invitation asking local restaurants, bakeries, cafes, and shops to create centennial-themed items or specials under the hashtag #Placentia100, and some of the town's longer-running businesses have leaned in.

Craftsman Wood Fired Pizza, open in Placentia since 2013, has quietly donated more than $25,000 to local schools, sports programs, and church organizations over the years, which makes it a natural fit for a milestone-year promotion. Meanwhile the food scene keeps shifting: Juan Pollo, the Southern California rotisserie chicken chain, announced plans this spring for a new location at 2095 East Orangethorpe Avenue, though no opening date had been set at the time of that announcement.

Even the city's agricultural roots got a moment this year. The George Key Ranch hosted its Summer Citrus Festival on June 13 at 625 West Bastanchury Road, a nod to the citrus groves that shaped this part of Orange County long before it was a city of tract homes and shopping centers.

What's Left Before December

The back half of the year carries the heavier concentration of centennial programming, and most of it lands after the bridge is scheduled to reopen.

The Placentia Library's Local History Lecture Series returns October 21, following earlier sessions in April and July, for anyone interested in where the centennial history book the city is compiling is headed. The Heritage Festival, which last ran October 11, 2025, at Tri-City Park with a pancake breakfast, parade, and classic car show, comes back this fall with added centennial touches. And the year closes with the Centennial Birthday Celebration and Tree Lighting on December 5, three days after the actual hundredth anniversary of incorporation.

Reading Both Calendars at Once

None of this is really a coincidence so much as a matter of scheduling gravity. Federal infrastructure funding and year-long civic anniversaries both take years to plan, and 2026 happens to be when both landed on the same city at the same time. What that means practically is simple: the least convenient stretch of the year for driving through the Golden Avenue corridor runs almost exactly through the same window as the biggest run-up to the fall centennial events. Plan your routes around Rose Drive, Bastanchury Road, or Valencia Avenue through mid-September, and expect the town to open back up, literally and on the calendar, right as the history lectures, the Heritage Festival, and the December birthday celebration take over.

That is the kind of detail that only shows up if you are actually tracking the city week to week rather than skimming a generic events roundup. Brad Kerr has spent more than three decades doing exactly that in this part of Orange County, watching how the small, local things (a bridge closure, a new restaurant, a festival lineup) shape what it actually feels like to live here. If you're weighing a move in Placentia, or just want a second opinion from someone who follows the city as closely as the market, reach out any time to request a free home valuation.