Sunday, November 16, 2014

Now that’s entertainment!

$779K helps lay foundation for 189-acre ‘family play’ zone


Great Wolf Resort isn’t a done deal.

But that isn’t stopping the city from taking the next step that would not only serve the 500-room resort with an 85,000-square-foot indoor water park but would lay the ground work for a massive 189-acre family entertainment zone also known by the shorthand of FEZ.

The City Council Tuesday is being asked to spend $779,157 from remaining redevelopment agency funds to retain the services of NV5 Inc. The engineering firm will design construction documents for major utility relocation work and expansion plus the extension of Daniels Street to McKinley Avenue.
Development of the FEZ will be accomplished via a public-private partnership. A private sector development group will construct the buildings, sports fields interior roads and “local” wet and dry utilities. The city will relocate and extend major utility lines such as water, sewer, and storm drains. the city also will extend McKinley Avenue.

McWhinney Development — the firm that would build the resort — is currently negotiating with Manteca as environmental studies are being completed for the resort and the rest of the FEZ.
If the Great Wolf Resort is built, it will be the biggest single investment at one time in a private sector project in the history of Manteca coming in at $150 million. Great Wolf would also become the largest private sector employer if and when they open their doors. It would take roughly two years to build and would provide 570 jobs of which 414 would be full-time. The projected annual payroll is $9.4 million.

McWhinney is basing negotiations on a 290,000-square-foot hotel with 500 rooms – with a possible future expansion of 200 rooms – along with an 85,000-square-foot indoor water park and a 20,000-square-foot conference center. A possible expansion would add 79,000 square feet to the water park and double the size of the conference center.

The resort would sit on 30 acres immediately west of Costco fronting the 120 Bypass. It would also include a conference center and community exhibition facilities plus a large public parking lot.
Two additional baseball fields would be added to the west of the Big League Dreams complex. The sports complex would also have a western entrance.

A large manmade lake would go to the west of BLD and north of the Great Wolf site. It would be surrounded by passive and active recreation facilities plus supporting commercial uses. A loop road would circle the lake and connect in three locations with Daniels Street as well as a future extension of Wawona Street that will go along the northern boundary of the BLD complex.

Nine playing fields designed for soccer including three international fields will be created. That is in addition to a playfield designed for soccer with spectator seating.

An indoor sports structure is envisioned along with outdoor speed sports plus areas for various other recreational endeavors.

Ultimately a new visitors center could be build on McKinley Avenue near its future connection with Daniels Street.

Since the FEZ will border the wastewater treatment plant facilities, a major landscape buffer is included.
At the same time two other projects are moving forward that complement the FEZ but are not a part of it. That includes work on creating an interchange on McKinley Avenue at the 120 Bypass and punching Milo Candini Drive through to West Yosemite Avenue.

The council meets at 7 p.m. at the Civic Center, 1001 W. Center St.



Executive Editor
dwyatt@mantecabulletin.com  
209-249-3519
 

Monday, November 3, 2014

Trains ease commute, bolster economy

It was “all aboard” the Altamont Corridor Express Thursday morning for some two dozen Manteca, Lathrop and Ripon community leaders to see for themselves how ACE serves thousands of riders a day on four trains.

ACE plans to expand its service into Stanislaus County in a bid to reduce freeway congestion for Bay Area commuters and boost the Central Valley economy.  They offer people the opportunity to experience commuting via train from the valley to learn more about its operation by offering three gratis passes to anyone just for the asking on their website.

A common thread running between ACE leadership and the communities it services is the “regional economic impact” of the ACE rail system expansion cities in five counties.

The new train station on Moffat Boulevard underscored the interest of Manteca community leaders as they boarded a 7:24 a.m. promotional ACE train to San Jose with their counterparts from Lathrop, Ripon, Modesto, Turlock  and as far away as Stockton and Merced complete with a stop at  the new 49ers Levi Stadium.

The future calls for ACE riders to be boarding at the new Manteca station as well as stations in Ripon, Modesto, Turlock, Livingston and Merced.  The cost of the rail expansion to Modesto of some $200 million is expected to be borne by the three counties most involved with the ridership, Stanislaus, San Joaquin and Santa Clara.

The extension of ACE service to Merced from Modesto is set at $350 million. The addition of the seventh to the tenth train is estimated at another $200 million.

The train averages speeds of 45 miles an hour through the Altamont Pass contrasts with backed up and sometimes stopped commuter traffic on the 580 corridor.  Thursday’s motor vehicles on commute routes were moving at about 10 miles an hour.  The rail line to the west from Manteca was built in the 1850s as a freight line and has required upgrades to handle the ACE passenger traffic.

The route is now heralded as an “easy access” to San Jose, San Jose Airport and to the 49ers Levi’s Stadium for games.  There have been special shopping trains offered in the past, but the lack of interest canceled that effort, according to an ACE spokesman.  A panel of three Manteca area residents spoke telling how they were able to work in the Silicon Valley and still keep up with their responsibilities at home — two with children in school and in sports programs.

The speakers were Jean Hernandez, Marlene Goodall and Marlene Vida.

Students and instructors from Stanford University and San Jose State are being offered a 50 per cent discount with hopes Santa Clara University can soon be added to that list. Senior citizens are also being offered discount rides.

There were also several representatives present from the Councils of Government from both San Joaquin and Stanislaus counties.

A dimly lit “Quiet Car” is offered daily where riders can catch a little extra sleep.  Thursday’s riders from the valley were led to a second level where they could enjoy each other’s company and converse as they chose meeting their counterparts from the other communities.

ACE owns some $70 million in rolling stock in diesel engines and cars along with $76 million in facilities and $113 million in upgraded rail infrastructure.

Riders from Manteca included Realtor Wendy Benevidas who said she and other Realtors routinely boast the availability of ACE to potential home buyers.  Joann Beattie, director of Manteca’s Chamber of Commerce joined the group as did Ripon Chamber President John Mangelos and his Executive Director Tamra Spade.  Manteca Economic Development Director Don Smail was also on hand for the trip and its presentations along with mayoral candidate Ben Cantu. 

Stacy Mortensen, CEO of the ACE train since its inception 15 years ago, spoke before the group in a downtown San Jose conference room said.

“We are at a point that we have to start thinking about a fifth train,” Mortensen said. “We follow what happens in the Silicon Valley — it powers us.”

Mortensen also told of a plan to create a tunnel in the Altamont to speed up trips.

The train allows for computer engineers and others in the high paying technology fields to consider the Valley for lower priced homes bringing those professionals to the cities of Stockton, Manteca, Modesto and hopefully as far south as Merced.  The two-hour trip to and from work allows them more time to work on their ongoing projects using Wi-Fi in some of the cars.  All the ACE cars will soon have the Wi-Fi connections.

“We have great shuttles,” Mortensen said of the connections to work sites after the train trip.  “Some take as much as 40 minute shuttle drives. We have a big partnership with transit groups.  We don’t charge for parking and we don’t charge for the shuttles now.” 

The ACE leader said there are normally some 18 shuttles waiting near the tracks on each train arrival where within two minutes many passengers disappear into the Santa Clara community. The service also connects with BART.  The bulk of the passengers from San Joaquin and Stanislaus counties are going all the way to San Jose, she said.

There is a drop off of passengers in Pleasanton making room for new riders boarding at that station on their way to San Jose.  When passengers arrive at their destination in San Jose there is always an ACE employee identified by his hat who directs riders unsure of just where to go from the terminal.

A recent survey of ACE riders indicated that nearly 37 percent of them brought their work with them so they could best use the time on the train.  Others told of making business calls on their cell phones and commuting through use of their email and their laptop computers.

The study also indicated that ACE riders, who work while they are on board, represent a collec-tive value of their work time at $12.5 million.  Current on savings of commuting costs came in at $11.8 million annually. 

Expansion projects to increase the reliability of ACE include the upgrading of new and upgraded siding, track realignment and the building of new rail connections in planned stages with service targeted to extend to Modesto by 2020.  With the launching of service to Modesto two additional trains will be added to the system.  Extension of service to Merced is slated for 2025 with an increase to 10 weekly daily trains.

Service is also expected to be extended to the weekends with the earlier operation of six trains.


 
Reporter 
gkahl@mantecabulletin.com

Thursday, October 23, 2014

They're Going Fast...

Having sold over a half-dozen homes in the past 3 weeks, Union Ranch - Unit 5  is down to its final 5 lots.  Stop by our Sales Office today and inquire about Close Out specials for the remaining lots.  

Atherton Homes - Sales Office
2517 Edgebrook Lane
Manteca, CA 95336
209-824-2071

Saturday, August 16, 2014

Inventory Special!

Looking for a new home in Manteca? We've got just the one for you!

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Saturday, July 5, 2014

ONE SWEET LIFE

Atherton helps shape economies in Manteca, Hawaii & Nicaragua

Executive Editor

“Coach” is still swinging for the bleachers.

These days, though, that entails Mike Atherton playing right field on a softball team in Maui while he oversees a coffee plantation, a popular Maui agri-tourism operation, and one of only two major community developments to get the blessing of county authorities in Hawaii to build homes and commercial.

Atherton has been called “Coach” for years. It’s a nod to his forte as a playmaker on teams that he has assembled for everything from tearing down the shuttered Spreckels Sugar factory and converting it into an economic juggernaut that spurred 21st century job growth in Manteca, building a school and homes for coffee plantation workers in Nicaragua or converting an old 2,000-acre sugar cane plantation into small farms, an agri-tourism destination, and a new community.

Atherton is the first to tell you the successes he has been involved with — everything from getting development rolling south of the 120 Bypass, Spreckels Park, the creation of bonus bucks in Manteca, laying the groundwork for Del Webb at Woodbridge and the Promenade Shops at Orchard Valley and even getting Great Wolf Resorts to take a look at Manteca — are team efforts. While he brings savvy, passion, and vision to the table his various partners in ventures ranging from Bill Filios, Al Boyce, Bing Kirk, and Toni Raymus among others bring equally important skill sets such as business acumen, attention to details, a love of their community, and a desire to do more than just build homes and business/industrial parks. Call it a desire to leave a legacy by building a community.

Atherton has been in Hawaii for five years. It is where he and partners launched Coffees of Hawaii, growing coffee on six islands and buying farmland on Molokai.

He found himself in his element.

“I’m a storyteller,” Atherton said.

He put that skill set to work talking the ears off tourists — including a number from Manteca — that make their way to his Molokai farm to satisfy their curiosity about everything from taro to sugar cane. But he soon found not a lot of tourists made their way to Molokai.

So when the opportunity came up to purchase the Waikapu sugar plantation, Atherton convinced his partners it was a great opportunity.

It was shortly thereafter that Atherton discovered that while it is challenging to develop in California it is a downright daunting task to do so in paradise.

Atherton envisioned a  project that preserved producing agricultural land, created an agri-tourism element, and provided 1,500 homes in a self-sustained community.

When he first rolled out the plan, the County of Maui gave him a clear thumb down. The motion to approve the project didn’t even garner a second.

“It was the first time I ever was told no for a project,” Atherton said.

On top of that — to paraphrase a favorite Atherton line — the sun stopped shining making it impossible to make hay as the global housing market collapsed.

That was when Atherton started deploying development strategies that helped lay the groundwork for an ongoing successful 35-year run in Manteca. He offered to give more for community endeavors than what development rules required. He tweaked the project to reflect local values and to provide the basis for sustainability for generations to come.

When the dust had settled, of the 20 projects vying to secure county approval in Maui only two survived — Atherton’s master planned Waikapu country town coupled with a prime farmland agricultural preserve and a development advanced by the iconic Hawaiian firm of Alexander Baldwin.

To date, local farmers are growing crops such as mangos, taro, avocado, bananas and coconuts on 1,000 acres of prime agricultural land. There’s tourists visiting what was once one of Hawaii’s premier sugar plantations, and the initial phases of a self-sustained community have been put in  place including solar farms and wind power generators to provide all the energy needed.

Following in Claus

Spreckels’ footsteps

Atherton’s venture in Maui has a definite Manteca connection — Claus Spreckels.

The Manteca sugar plant that AKF Development would later tear down and replace with a multi-use project generating close to 2,000 jobs  was built in 1916 by Spreckels. Atherton and his partners bought the Waikapu sugar plantation that was originally founded by Spreckels several years after he established his Manteca plant.

“The factory was almost identical to the one in Manteca,” Atherton noted. “It was designed by the same guy.”

Atherton has impressed natives and local history buffs with his knowledge of Claus Spreckels and his sugar empire. They often asked how he became some versed in the subject.

“I learned it all in Manteca is what I tell them,” Atherton said.

He’s the man for whom Atherton drive in South Manteca is named. The road is destined to become the community’s most heavily traveled thoroughfare as the 1,049-acre Austin Road Business park develops along with commercial fronting the 120 Bypass. Atherton followed in the footsteps of other famous men — his grandfather and his great-grandfather.

Great-grandfather Benjamin Holt revolutionized farming and land development when he invented the Caterpillar in Stockton in the 19th century. The machine’s first big tests included transforming tens of thousands of acres in the San Joaquin Valley into fertile farmland and the development of the Delta’s levee system.

Grandfather Warren Atherton was the national commander of the American Legion who created and successfully lobbied to get Congress to adopt the GI Bill assuring those who served America of being able to get a college education.

Atherton said sometimes he tries to figure out which had a bigger impact on America — the invention of the caterpillar or the GI Bill.

“It’s an interesting debate,” he said.

His father Warren Atherton II was a lawyer who passed away at age 49.

Atherton picked up his passion for building communities from his uncle Sandy Atherton who was the developer of the 7,000-acre Lincoln Village area in Stockton.

Manteca is

Atherton’s home

Atherton, 65, is in Manteca for a spell.

He has business interests here including Atherton Homes and a piece of other ongoing endeavors including Austin Road Business Park. He has a home here and his son lives here.

His Manteca home is a tad more traditional than his accommodations on Maui where he lives in a converted double decker bus.

“Hawaii is the most beautiful place in the world next to Manteca,” Atherton said.

 Those aren’t words of a salesman. Instead they are from a man who takes pride at what he and his partners have helped bring to Manteca and one who sees even greater things on the horizon for the community.

“My plan is when I’m through in Hawaii is to come back here and help finish things up,” Atherton said.

Atherton was the key linchpin to convince others to put their fortunes on the line to demolish the sugar refinery and develop Spreckels Park. Banks wouldn’t touch it. Other developers feared possible “hidden” pitfalls such as toxic issues and the daunting task of demolishing a factory, tearing down four 15-story concrete silos, and rehabilitating the land include the equivalent of 75 years worth of lime use for county agriculture.

The abandoned factory was at the most high profile intersection in Manteca — the Highway 99 and 120 Bypass. And as such it posed the potential of being a cancerous blight that could severely limit economic growth in Manteca.

At one point the partnership teetered on bankruptcy with cash dwindling down to a week’s supply at best until a deal was closed for the sale of the 177-lot Curran Grove neighborhood where factory housing and an almond orchard once stood.

Atherton flees

the Sandinistas

Atherton’s road to Manteca included cutting his teeth as a farmer and community builder in Nicaragua.

Atherton while in his 30s, said a college friend who was a Peace Corps worker urged him to go to Nicaragua for two weeks. If he didn’t like it, the friend said he’d at least get a vacation.

Atherton ended up investing five years developing raw land in the Central American country into productive farms as well as building villages.

He eventually got Bing Kirk —  who was a partner with him and Filios in the development of Spreckels Park— to join him for several years.

“One day the workers came to me and said ‘Mike there’s going to be a war and we don’t want you to get hurt. You have two weeks to leave,,” Atherton once recalled.

Atherton escaped Nicaragua in 1979 before the Sandinistas overthrew the government in a bloody war.

Atherton returned to San Joaquin County. He eventually returned to Nicaragua and founded the Jesus Mountain Coffee Plantation that is operated in tandem with Coffees of Hawaii coffee plantations.

Atherton who was born in Stockton and graduated from Stagg High was the front man — development jargon for the managing partner who puts together deals— for a variety of partnerships that at one time represented the bulk of future urban land in both north and south Manteca.

Manteca’s darkest hour

It was Atherton who stepped up to the plate in what was arguably Manteca’s darkest hour in 1997 when Spreckels Sugar was getting ready to shutter the beet processing plant that for generations was an economic mainstay of the community. There were 225 permanent jobs at stake plus dozens of seasonal jobs.

Consulting engineer Ron Cheek approached Atherton about Spreckels company representatives who were looking for a development partner for the 365-acre sugar plant site.

Spreckels Sugar’s original plan had involved leaving the factory and silos intact while surrounding it with 600 to 800 homes, developing commercial along Moffat and a 9-hole golf course with business park uses along Highway 99.

They soon realized it couldn’t work with the factory still there. The Spreckels Sugar corporate hierarchy originally thought it would be a matter of developing the land while shuttering the plant for awhile waiting for sugar fortunes to improve.

But that wasn’t going to happen. Increasing costs for sugar beet growing in California and tougher air quality standards coupled with stiff competition overseas and in the South made a sugar refinery an uneconomic proposition. Holly Sugar in Tracy — the county’s last hold-out — succumbed to the economics nine years ago as well.

There was another problem. No one wanted to develop the property in conjunction with Spreckels with the sugar factory still there and none — including Spreckels — thought that it could be removed without busting the proverbial bank.

So Atherton — with no experience developing an industrial park or commercial ventures — forged ahead. He took a vision to the sugar corporation and put together a partnership that was able to marry private capital with redevelopment agency funds — primarily loans of $5 million that were just paid back in full over five years ahead of schedule — to put in infrastructure necessary to attract commercial users and employers.

But before RDA could add muscle, the factory had to be cleared.

Sweet deal

Atherton found ways to make the clean-up and demolition pencil out.

Soil testing alone searching for contaminates would push the $1 million mark.

Atherton found innovative ways to make the deal work. The four 15-story silos that were imploded before 10,000 onlookers created a mountain of concrete that was crushed and used for road base for what Atherton calls “the sweetest stretch of freeway in California” when Highway 99 was widened from four to six lanes between Manteca and Ripon.

An Oakland salvage company bought the iron. Bricks from the nearly 80-year-old warehouse were recycled. Many were sold but some made their way into projects around Manteca — the front of the now shuttered Kelley Brothers Brewing Co. & Brickyard Oven Restaurant, traffic islands and monument signs in Spreckels Park and the Spreckels Sugar historical plaza developed by AKF for $200,000 behind the Chevron gas station at Yosemite and Spreckels avenues.

Altogether, 98 percent of the factory and silos were recycled. It was such an impressive revitalization effort that Spreckels Park garnered several state awards.

Start in building

Atherton’s first venture into home building took place in Manteca.

He bought acreage on the north side of Louise Avenue west of the Highway 99 freeway back in the days when the interest rate was pushing 20 percent.

Raymus had everything on the south of Louise Avenue. Atherton said they got land north of Louise and west of Highway 99 because no one else wanted it.

Atherton started a home construction venture with his partners. Just like in Nicaragua learning the ins and outs of land development and farming, Atherton immersed himself in all details of the construction business right down to doing the final walk through.

The first year they sold six homes(in Springtime Estates and Raymus sold 60 across the street.

“I asked Antone Raymus what I was doing wrong,” Atherton recalled in an interview eight years ago. “He told me, ‘son, you’ve got to make a few changes’, and then proceeded to delineate all of the insights he had gleaned in nearly 35 years of home building at that time.”

Atherton’s admiration for Raymus runs deep. He looks at what Raymus has contributed to the community as well as solid business decisions to emulate.

He also learned another lesson the hard way — greed is not a good thing.

During the go-go days of the late 1980s and early 1990s, AKF got a bit too aggressive and when the downward slide of 1991 hit, he was one of those builders that came precariously close to the edge because they kept building inventory like there was no tomorrow.

Since then Atherton monitors market trends much closer and does get ahead of the curve. As a result, you will rarely see Atherton Homes with standing inventory.

Working deals

Atherton’s ability to juggle deals and make them work gained a lot of attention in Manteca.

The Woodward Park deal — still the best developer offer ever accepted by the city with  52 acres for $1 and no strings attached — back in 1988 rates as a visionary move even though it has taken the city 15 years to finally get to the point they can do visible development.

Atherton didn’t ask to be exempted from park fees in exchange for the land. In fact, he was among a handful of developers leading the charge 12 years ago to significantly raise park fees. He went a step further and argued they didn’t raise them enough after jumping them more than $1,300 per home.

All of his “deals” hinge on building toward the future with the bottom line being doing the best now means higher returns down the road.

Ask him about Atherton Drive as it has developed around Airport Way and he’ll literally bristle.

He has no kind words for developers who do the minimum and then check out of Manteca.

The portions he developed of Atherton Dive have lush landscaping and bike paths, something that he put in place before the city adopted such standards. In fact, Atherton and his partners drove today’s Manteca landscaping standards.

That is in stark contrast to Atherton Drive near Airport Way where it is asphalt curb to curb with cement sidewalks pushed up against block sound walls.

Roots run deep

Atherton’s ties to San Joaquin County run deep.

His great-grandfather Holt came to Stockton from New Hampshire in 1849

A wagon wheel maker by trade, Holt figured that there would be a huge demand for his product from the men heading toward the gold mines.

After the Gold Rush, Holt turned his attention to the potential of the great Central Valley. It didn’t take long to see traditional farming implements were cumbersome and getting stuck in the valley soil.

So the inventor in Holt — who created 35 different agricultural implements in his lifetime —rolled out a product that would revolutionize farming, land development and even modern warfare worldwide — the Caterpillar tractor.

The tracks distributed the weight of the farm equipment. Holt Manufacturing started turning out Caterpillar products from its Stockton factories.

Atherton’s grandfather —Warren Atherton — married Holt’s daughter Anne. A lawyer by trade, Warren Atherton entered the Holt family concern.

Holt was the inventor and Warren Atherton was the businessman.

Warren Atherton answered the call to duty in World War I and so did Holt Manufacturing. They literally invented the tank by taking a tractor and mounting a gun on top of it to end the reliance on trench warfare. Holt Manufacturing innovations were prevalent on the battlefields throughout World War II.

The Holt Manufacturing plants were shifted to Peoria, Ill. to be more central to the United States markets and closer to the Atlantic where many of the military equipment needs were being shipped to Europe.

After Warren Atherton’s stint in Europe, he was the driving force behind the creation of the G.I. Bill that provided millions of returning servicemen the opportunity to access higher education. His significant contribution to increasing the standard of living of millions through education resulted in Delta College naming its performing arts auditorium in his honor.

His own course

Atherton is a 1967 graduate of Stockton’s Stagg High.

“About the worst thing you had back then in Stockton was fights,” Atherton once recalled. “Stagg was a rah, rah school back then. It was a different time.”

Atherton went off to San Jose State where he pursued political science studies.

Atherton was hanging out around Lake Tahoe after graduation when his friend who had served in the Peace Corps asked him to join him in Nicaragua.

Back in Nicaragua

It is because of the five years that he spent there, that Atherton came up with the idea to enter the coffee business.

Atherton and partners purchased a coffee plantation, rebuilt the farm town — including church and school —  where most of the 75 permanent workers live. The partnership also hires 400 seasonal workers to pick coffee beans.
 

Monday, June 16, 2014

Location, Location, Location...

200-year flood threatens 30,000 Manteca, Lathrop, WR area residents

By Dennis Wyatt - Managing Editor

All of Lathrop west of Interstate 5 and east of the San Joaquin River, every dwelling in Weston Ranch as well as southwest Manteca neighborhoods could end up under upwards of 10 feet of water in the event of a major flood rated as a 200-year occurrence.
More than 30,000 people would be forced to flee to higher ground including the entire community of Lathrop.
That’s what a 200-year flood composite floodplain of maximum flood depths being prepared for the cities of Manteca and Lathrop by Folsom-based Peterson, Brustad Inc. Engineering Consultants. State law requires 200-year flood plains to be identified and steps made to enhance protection or else face severe restrictions on new housing, retail and industrial development after July 2016.
At the same time the federal government will use such flooding models to require mandatory flood insurance that, based on a proposal that was narrowly defeated this year in Congress, could cost homeowners with government backed mortgages in excess of $2,000 a year.
The Manteca City Council will review the map when they meet Tuesday at 7 p.m. at the Civic Center, 1001 W. Center St.
If the city shows they are making “adequate progress” they may be able to defer for several years the July 2016 deadline that essentially stops all development within identified 200-year floodplains.
Those steps include:

• identifying required levee improvements.

• obtaining design criteria approval from an independent panel of experts.

• establish a financing plan and mechanism to fund the needed levee improvements.

River Islands at Lathrop would have been included in the 10-foot high floodwater area if it hadn’t been for the fact Cambray Group invested $70 million in creating super levees that are 300 feet wide. They received the highest possible rating by federal disaster agencies for being able to withstand a 200-year flood event.
A 200-year flood event doesn’t mean it will happen only once every 200 years. It simply refers to the worse that could happen every 200 years. The Northern San Joaquin Valley has been hit with three 100-year flood events in the past 60 years.
Part of the reason for the increased frequency is development is increasing impermeable surfaces such as roof tops, parking lots and streets making is impossible for storm run-off to soak into the ground.
Also, there is silt build-up in a large swath of the San Joaquin River between the confluence with the Stanislaus River and Mossdale Crossing that hasn’t been dredged.
The modeling is based on both rivers overflowing their banks or punching through levees as they did in the 1997 flood. Back then cross or dry levees kept water from reaching homes in Manteca. Crews were able to secure breaches before they got substantially worse. Had leeves failed, the state was preparing for a mandatory evacuation of Weston Ranch but not Lathrop. That’s because there was no development west of Interstate 5 and east of the San Joaquin River in Lathrop in 1997 nor was there south of the 120 Bypass along Airport Way. That is not the case today.
Back in 1997 the underpass on 120 Bypass for McKinley Avenue and the underpass on Interstate 5 at Louise Avenue were plugged with dirt by Caltrans to create makeshift levees to protect Manteca and Lathrop.
In today’s worst case scenario some 300 plus homes in Manteca south of the 120 Bypass and straddling Airport Way would have four to 10 feet of floodwater.
The city has tentatively looked at requiring developers of the Trails of Manteca to improve a cross levee that eventually would be extended to the east to a point near Tinnin Road to enhance flood protection for the area.