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Why It’s Taken Concord 40 Years to Turn a Former Bomb Site into a Neighborhood

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Bunkers previously used for storing ammunition at the former Concord Naval Weapons Station abut a residential neighborhood in Concord on April 23, 2026. (Martin do Nascimento/KQED)

View the full episode transcript.

Suzanne Howard loves living in Walnut Creek. She said it’s safe, walkable and she bikes everywhere. The only downside? She lives right next to a 12-lane freeway.

“[I’m] super thankful to have a house, but… noise pollution is a little much,” she said.

One day, Howard was daydreaming about living near open space and started looking around online for places that fit the bill. Is it even possible to buy a house in the East Bay next to undeveloped land?

And there, in Concord, behind a local high school, was a swath of green rolling hills big enough to accommodate a new airport. When she zoomed in, she saw puzzling features, grass mounds in a grid pattern.

“What is this?” she wondered to herself. “Could we build housing there? It’s prime real estate, why not?”

Those grassy mounds in a grid pattern are huge concrete bunkers, wider than a train car, used by the Navy for more than 60 years to store weapons, bombs and ammunition.

What happened at the former Concord Naval Weapons Station

Dozens of these ammunition bunkers, grass-covered trapezoids poking up from the landscape, are what’s known as “bunker city,” just one part of a 5,000-acre inland section of a military base called the Concord Naval Weapons Station. The storage units are empty now, but they once stored the weapons of war that the Navy needed to fight wars from the 1940s all the way through the 1991 Gulf War.

Railroads connected this inland base to the bay where artillery was loaded onto warships.

Kathy Gleason looks through her back fence at the former Concord Naval Weapons Station in Concord on April 23, 2026. (Martin do Nascimento/KQED)

“In years gone by, we could hear trains moving at night out there,” said Kathy Gleason, who moved next to the Naval base back in 1974. “They were moving munitions.”

Even though Kathy’s backyard is separated from bunker city by just two fences, you can’t tell she lives next to a military site. By design, the mounds blend into the lush green landscape to camouflage them from enemies coming by air or by foot. Besides the mounds, there aren’t many buildings. And it has always been relatively quiet here, with vistas of sheep and cattle grazing. That’s what drew her here in the first place, 50 years ago.

“We used to see tule elk roaming around,” Gleason said. “Now we see turkeys, we hear coyotes, we’ll see deer every now and then. It’s pretty peaceful.”

Then in 2005, everything changed. The Concord Naval Weapons Station closed, as part of a federal initiative — the Base Realignment and Closure process (BRAC) — to cut military costs and adapt to new systems of warfare. Through BRAC, hundreds of military sites shuttered nationwide, including dozens in the Bay Area.

Immediately, the city of Concord started making plans for redevelopment. The 5,200 acres behind Gleason’s house would change hands. She feared a big developer would swoop in to turn it into a metropolis, and before that, a big, noisy construction zone.

“We all kind of panicked,” Gleason said. “We wanted our peace and quiet, and we were concerned about what’s in the soil. What’s going to happen with that when they develop?”

Gleason became a key organizer in the Concord Naval Weapons Station Neighborhood Alliance, which tabled at farmers markets, knocked on doors, and showed up at city planning meetings advocating to keep the weapons station land untouched and open.

“We were like the old town people that went down Main Street with pitchforks and torches. We were so angry,” Gleason said about their organizing efforts back in 2006.

“We told them, we are not going away. We want this preserved.”

Reenvisioning ‘Bunker City’ 

Twenty years later, all the peace and quiet that the Concord Neighborhood Alliance wanted is still there. Not a single permanent structure has been built on the former weapons base yet. What’s the holdup?

First, the city went through a seven-year process of engaging residents to come up with a master vision for the site. It culminated in the 2012 area plan.

Josh Roden, a developer at Brookfield Residential working with the city of Concord to redevelop the Concord Naval Weapons Station, stands on a hillside overlooking the former naval base in Concord on April 23, 2026. (Martin do Nascimento/KQED)

All the while, there was a lot of cleanup and bureaucracy. The Navy had to remove arsenic and lead from the soil and groundwater. The city had contracts with two developers before the current one. One jumped ship, and one was booted.

But the slow and deliberate pace the Navy and city have been on is not necessarily a bad thing, the current master developer said.

“Concord did a really good job of engaging the entire community,” said Josh Roden, president of Brookfield Northern California, which is managing the redevelopment of the site. “It’s a lot of work and effort, and it can be a little painful to manage.”

Roden’s team is now tasked with implementing the specifics of the 2012 general plan.

“It’s like building a small city,” he said.

Concord residents expect 12,000 residential units, which is roughly equivalent to the nearby town of Pleasant Hill, home to 34,000 people.

Six million square feet are earmarked for retail, office and institutional space, and businesses such as hotels and restaurants, which will be most dense near the North Concord Bart Station. That’s more space than the footprint of Disneyland.

There will be a sports complex and city park, stretching over 175 acres, and a higher education campus, like a college or technical school, along with elementary and middle schools. Fire and police stations will be built, as well as a food bank, and a pedestrian path along Mount Diablo Creek.

The plans are grand and exciting, but Concord residents will have to wait a long time.

Roden said construction won’t break ground until 2030, and it will probably be “a 40-year build out.”

The first phase includes housing near the North Concord BART station. Residents can expect more electric vehicle infrastructure, denser housing, and retail space blended with other leisure activities. How quickly it all moves along depends on the health of the economy, Roden said.

Kathy Gleason’s home abuts the former Concord Naval Weapons Station in Concord on April 23, 2026. (Martin do Nascimento/KQED)

Open space advocates like Kathy Gleason have already had a notable win. Half of the inland naval base — roughly 2,500 acres, has already been handed over to East Bay Regional Parks. Thurgood Marshall Regional Park is not yet open to the public, but when it does, visitors will be able to see the ammunition bunkers during historic tours.

“We put years of our time into preserving what we can out here,” said Gleason, who also said she now understands that housing is a critical need in the Bay Area.

“Let’s make it as good as we can for future generations. And that’s the best we can do,” she said.

Suzanne Howard of Walnut Creek said she’s glad the Concord housing development will be near open space. She just hopes she’s alive when it all comes to fruition.

“That’s kind of scary how long it takes,” she said. But sometimes, “good things take time.”

Episode transcript

Olivia Allen-Price: Hey everyone! This is Bay Curious — the podcast that answers listener questions about the San Francisco Bay Area.

We recently got a question from a woman named Suzanne Howard.

She bought a house with her husband in Walnut Creek two years ago and she loves the place. How it feels safe and walkable to lots of shops. They bike everywhere. But one thing gives Suzanne a little buyer’s remorse.

Suzanne Howard: It’s right next to the 12 lane freeway. It’s super noisy, super thankful to have a house, but like quality of life noise pollution is a little much.

Olivia Allen-Price: One day, Suzanne was feeling curious, and she started studying online maps, looking for open space in the East Bay. Where could more housing be built near her that might offer a little more peace and quiet?

Suzanne Howard: And I found as I zoomed out, I saw east of Concord High School green open fields, gorgeous greenery hillside, some streets. And then little mounds, little grass mounds which, all in a grid pattern. What is this thing? 

Olivia Allen-Price: Five thousand acres of open space with seemingly nothing going on. It wasn’t a park or anything. Just a big open area and those mounds. 

Suzanne Howard: Could we build housing there? It’s prime real estate, why not? 

Olivia Allen-Price: I’m Olivia Allen-Price. On today’s episode, we asked KQED’s Pauline Bartolone to scout out that area behind Concord High School. What are those grassy mounds in a grid pattern? 

Pauline Bartolone: I’ll give you a hint, it’s not a cemetery. 

Olivia Allen-Price: Ok. Is it open to the public? Can I go on a walk there? 

Pauline Bartolone: Well, right now, no. In a few years, probably.

Olivia Allen-Price: What about Suzanne’s question, could housing be built there?

Pauline Bartolone: Yes, actually that’s in the works, we’ll get to more on that in a minute. 

Olivia Allen-Price: Ok, so tell me what you saw when you went out there? 

Pauline Bartolone: Well I found someone who lives right near Concord High School, and those 5,000 acres of rolling hills are right behind her house. 

Kathy Gleason: My name is Kathy Gleason. We’re in Concord in my backyard, and looking at the Concord Naval Weapons Station. 

Pauline Bartolone: The Concord Naval Weapons Station. That property our listener Suzanne saw on the map, belongs to the Navy. 

Pauline Bartolone: During World War 2, the navy stored tons of explosives here in huge concrete bunkers camouflaged with earth to look like grassy hills. Those are the mounds Suzanne saw on the map. 

Kathy Gleason: Go ahead. You can see the bunkers back there. 

Pauline Bartolone: Over a hundred concrete weapons storage units here supplied bullets, missiles, bombs, anything the military needed for combat all the way up to the first Gulf War. Railroads connected this inland base to the Bay where artillery was loaded onto warships. When Kathy moved here in 1974, it was active.

Kathy Gleason: In years gone by, we could hear trains moving at night out there. So they were moving munitions. 

Pauline Bartolone: Kathy says she loves living next to a weapons base… because.. it’s quiet. Those ammo bunker mounds…. they’re empty now… and they blend into the lush green landscape… And there aren’t many other buildings there. She says it’s always been pretty calm, part of what drew her here in the first place 50 years ago. 

Kathy Gleason: Who wouldn’t like this in their backyard? You can hear that plane, but other than that it’s pretty quiet. When we first moved in, there were a lot of sheep out there. There’s still a lot of cattle out there grazing. So we used to see tule elk roaming around, now we see turkeys, we hear coyotes, we’ll see deer every now and then. It’s pretty peaceful.

Pauline Bartolone: Then Concord residents got news that could change everything. The weapons station would close in 2005. This huge swath of open land, roughly the size of San Francisco International airport, was going to change hands. 

Kathy Gleason: We all kind of panicked. All the neighbors along here kind of panic.

Pauline Bartolone: They worried a developer would swoop in and build a metropolis, a big noisy construction project.

Kathy Gleason: We wanted our peace and quiet, and we were concerned about what’s in the soil. What’s going to happen with that when they develop? And the noise and everything that would go with developing a project this big, this is huge.

Pauline Bartolone: The Concord Naval Weapons Station closure was part of a federal project to cut military costs. It was called BRAC, the Base Realignment and Closure process. Hundreds of military sites shuttered nationwide. Immediately, the city of Concord started making plans for redevelopment.

Kathy Gleason: We were so angry.

Pauline Bartolone: Locally, Kathy quickly became a key organizer among neighbors pushing to keep the weapons station land untouched and open.

Kathy Gleason: We quickly got a group together, went down the City Hall. Surprised the hell out of the city council members because we were like the old town people that went down Main Street with pitchforks and torches. 

Pauline Bartolone: For years, they tabled at farmers markets and knocked on people’s doors to educate Concord residents about the potential for development. And of course, they were squeaky wheels at city council meetings and planning commission hearings.

Kathy Gleason: We told them, we are not going away, you know, listen to us, we’re not going away, we want this preserved.

Pauline Bartolone: And they got their wish, in part. Half of the area behind Kathy’s house has been handed over to east bay regional parks. The old ammo bunkers there will become part of historic tours. And when it opens, locals can hike, camp or have a picnic next to protected wildlife areas. 

Kathy Gleason: We put years of our time into preserving what we can out here. We hope that it works. We slowed down after we got the park. 

Olivia Allen-Price: Coming up, we’ll learn how the other half of the land will be used. That’s after this quick break. Stay with us.

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Olivia Allen-Price: KQED’s Pauline Bartolone takes us back to the Concord mounds, to find out what’s planned here. But this time, from a different vantage point. 

Pauline Bartolone: Kathy and her neighbors were up in arms about plans to build on the military site next to their homes. That was two decades ago, and all that peace and quiet? It’s still there. 

Josh Roden: We are looking out over the valley or floor area of old bunker city.

Pauline Bartolone: Josh Roden is a private developer, and he took me onto the old Concord Naval Weapons station. From our vantage point you can see the former weapons storage clearly… dozens of massive trapezoids poking up from the soil. 

Josh Roden: They’re mostly concrete bunkers with earth over them.

Pauline Bartolone: Josh heads up Brookfield Residential in Northern California, which is working with the city of Concord to redevelop the navy base based on a roadmap Concord residents like Kathy helped create. When it’s done, the site will have housing, businesses, schools and parks. 

Josh Roden: Concord did a really good job of engaging the entire community, getting a whole bunch of feedback. It’s a lot of work and effort, and it can be a little painful to manage through that, because it’s a lot of opinions. 

Pauline Bartolone: But so far, it’s been a lot of discussion, 20 years worth. And not a single permanent structure has been built here. 

Josh Roden: One of the most important parts is the first, being able to flush a toilet and turn a light on. So we really do have to go bring power. We have to bring potable water, we have to bring storm drains.

Pauline Bartolone: So, what’s the hold up? Well, there’s been a lot of clean up and bureaucracy. The Navy had to remove arsenic and lead from the soil and groundwater. The city had contracts with two developers before the current one. One jumped ship and one was booted. And before all that, Concord spent seven years coming up with a master plan with residents. A vision for the site.

Josh Roden: So they ended up coming up with what we think is a very reasonable and good area plan, but it did take some time.

Pauline Bartolone: And their plans are grand… just down the hill from where Josh and I are standing, will be some of the 12,000 residential homes. 

Josh Roden: The number of units, the size of it is similar to Pleasant Hill. So for context the population that it would generate. It’s similar to Pleasant Hill.

Pauline Bartolone: That’d be housing for something like 34-thousand people. Also in the plan are retail and office space, most dense near the North Concord Bart Station.

Josh Roden: Hotels and maybe more restaurants and a place people go leisure. 

Pauline Bartolone: Then there’s the outline for a sports park – stretching over 175 acres – and a higher education campus, like a college or technical school.

Josh Roden: We are also coordinating some of the elementary school, middle school potentially to be in that vicinity. 

Pauline Bartolone: Fire stations, police stations. A food bank and a pedestrian path along Mt Diablo creek, All the amenities of a town.

Josh Roden: It’s like building a small city.

Pauline Bartolone: That may sound exciting but it will all take a looong time. Like decades. 

Josh Roden: Currently, it’s planned out for probably a 40 year build out.

Pauline Bartolone: They won’t even break ground until 2031, and there’s still some bureaucratic hurdles. Ultimately, Josh says how quickly it gets built depends on the health of the economy, Housing is what pays off for the developer, so the the first to go up will be homes close to the North Concord BART station. 

Despite her early reservations about building on the site, Kathy has had a bit of a change of heart about new housing. She says the Bay Area needs it.

Kathy Gleason: We were not as panicked as we were. I think I do understand. Let’s do it. Let’s make it as good as we can for future generations. And that’s the best we can do.

Suzanne Howard: It’s a long time. Geez. 

Pauline Bartolone: I took all this back to Suzanne Howard, our question asker. She likes that the Concord development will have open space near it, not a 12 lane highway like the one next to her house. As far as taking more than half a century to finish the new housing? 

Suzanne Howard: That’s kind of scary how long it takes. But hopefully, you know, assuming positive intent and the cleanup hopefully is being very thorough and good things take time. 

Pauline Bartolone: She just hopes she’s alive to see it come to fruition. 

Olivia Allen-Price: That was KQED’s Pauline Bartolone.

Thanks to our question asker this week, Suzanne. 

Did you know that we send a little thank you gift to each question asker? Just one more reason to take a few minutes and send your burning question our way! Ask at BayCurious.org, or shoot us an email at baycurious@kqed.org.

This is our last Monday episode during our experimental period of dropping two episodes a week. We’ve learned so much — and had a lot of fun answering twice as many of your questions these past few months. We always planned this to be a limited-term trial — so we’re back to our once a week publishing schedule next week. If you have thoughts or feedback for us as we take stock and move forward, email us at baycurious@kqed.org.

Bay Curious is made in San Francisco at member-supported KQED. Our show is produced by me, Olivia Allen Price, Katrina Schwartz, Christopher Beale and you! Yes you are a producer on this show if you are a member of KQED. Your financial support makes everything possible. 

Deep gratitude to all the KQED members out there, and if you aren’t one yet, join us! Give at KQED.org/donate.

I’m Olivia Allen-Price. Have a great week!

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