L.A. activists try to stop woodlands from becoming sediment dumps

  • Oak woodland in Arcadia, California.

    Joshua Link, ecotonesudios
  • Los Angeles County's Santa Anita Sediment Placement Site slopes into the concrete channel of Santa Anita Wash in Arcadia, California.

    Joshua Link, ecotonesudios
  • St. Francis Dam (colorized) after its catastrophic failure in 1928 resulted in flooding that killed more than 450 people.

    Pony Horton
  • Giant stumps from the Arcadia Woodlands that were knocked down to make room for sediment from the Santa Anita Dam

    Emily Green
  • Camron Stone last month in front of a watershed map at the L.A. County Department of Public Works, where the Flood Control District had just released its strategic plan showing sediment outpacing dump capacity over the next 20 years.

    Emily Green
  • The Santa Anita Creek Wash, remade by the L.A. County Flood Control District last winter. To the right (west) is Camron Stone's neighborhood, with its 1950s houses which were marketed highlighting their proximity to the noble oaks of Arcadia. In the background, Arcadia and the L.A. Basin.

    Emily Green

The list price was $1.125 million in August 2011, when Sotheby's International Realty held the first open house for 1674 Highland Oaks Drive, in the Los Angeles suburb of Arcadia. Scented candles burned, classical music played and the air conditioner ran as potential buyers milled through the home's three bedrooms, living room and combination den/dining room. Through sliding glass doors, a pool was visible in the rear garden; beyond it stood a sharply trimmed hedge. Past the hedge, in the ravine below it, a deep wash lay. Metropolitan Los Angeles ends at the edge of this canyon property, and above the wash, its steeply upland collar of national forest begins.

Once, like all the canyons threading the foothills of the San Gabriel Mountains, Santa Anita Wash had a stream tumbling through it, lined with coast live oaks, sycamores and mountain mahogany. In the dappled light of the understory grew coffee ferns, delphinium, phacelia, monkeyflowers. Bears gorged on blackberries while scrub jays jealously cached acorns. By day, the canyon was atwitter with finches and bushtits, and at night, the tree frogs and crickets chorused.

But on the day of the open house for what Sotheby's called its "Highland Oaks Beauty," there was no wild swell of twittering. No frogs, no crickets, no sign of a creek. The roughly 200 acres of sun-bleached concrete, gravel and sand in the canyon below resembled some kind of quarry. In a sense, that's what it was -- a pit gradually gouged out of the woodland over the last 85 years in an ongoing struggle to contain the mountains.

This was the front line between Arcadia and the notoriously sandy slopes of the San Gabriel Mountains, which in any given year, if it rained hard enough, just might bury what Businessweek Magazine routinely ranks as one of America's "Best Places to Raise Your Kids" under a roiling mix of rock, sand and water. Santa Anita Creek once flowed freely here. Now, there was a reservoir two miles upstream, then a debris basin to settle grit out of the released water, a concrete channel funneling clear water out of the basin, and a series of gravel-lined pits to filter and store it for later use in local kitchens and pools.

That summer day in 2011, a newly erected elevated conveyor stood alongside the debris basin, channel and pits. It was there to carry sediment from a scheduled cleanout of the reservoir. Beyond that, most of the eastern lip of the creek's steadily widening wash had been cleared for a sediment dump.

Back inside the house, asked about the potential for noise from the flood-control site, the Sotheby's agent said, "No, there's no noise." After a moment's thought, she reconsidered: "Wait a minute. There were some trees."

There were indeed some trees, most recently 179 oaks and 80 or so sycamores. They comprised such a rare remnant of old-growth riparian woodland that when the Los Angeles County Flood Control District bulldozed them eight months earlier to enlarge the sediment dump, the state's most famous tree-sitters climbed into the canopy. Actress Daryl Hannah protested at the gate. News helicopters thundered overhead.

Only later did it become clear that the skirmish was about more than just a single woodland. It was the catalyst for the far deeper and wider recognition that the Los Angeles County Flood Control District planned to bulldoze yet more wild places in more wild canyons, even in the Angeles National Forest, to dispose of a backlog of sediment from 13 other dams and 161 other debris basins. The felling of the Arcadia woodland, in effect, drew back the curtain on the magic trick that makes life on a floodplain possible for 10 million people. In the furor that followed the bulldozing of the oaks behind 1674 Highland Oaks Drive, not just environmentalists but also ordinary homeowners suddenly came to believe that L.A.'s Flood Control District had become as hardened as its paved river beds. In the process, it had gone too far, destroying what drew many residents to Los Angeles in the first place.

"Hell, we're giving away the land, we're selling the climate," quipped Elias "Lucky" Baldwin, who owned the ranch that back in the day encompassed Santa Anita Wash. The year was 1881, and the railways had just come to Southern California. The land rush was on. But one thing never made the fine print of the deeds: flood danger. After nine often-deadly storms washed through the Los Angeles Basin, a catastrophic flood in February 1914 drove so much silt into the San Pedro Harbor that ships couldn't dock. The Chamber of Commerce finally demanded action. Loss of life was one thing. Loss of business was another: The Panama Canal was just about to open up maritime trade to the Pacific as never before. In 1915, the Los Angeles Flood Control District was formed.

Flood Control's goal, as set down by James Reagan, its first engineer, was not just to protect the port, but also to render as much as possible of L.A.'s "non-operative" land commercially viable. By 1927, the Santa Anita Dam above Arcadia was completed, and the 13 other dams along the San Gabriels were either built or in the pipeline. Reagan told Angelenos that the only way someone at the port would even know about torrents in the mountains 40 miles away would be if they telephoned to inquire about the weather. The next year, however, St. Francis Dam failed just outside Los Angeles. The ensuing floodwaters killed hundreds. The heyday of dam building in Southern California was over.

The decline of new dams would have made more sense had other measures been taken to prevent flood damage. The notion of hazard zoning got such short shrift, observed Jared Orsi in his 2004 history Hazardous Metropolis: Flooding and the Urban Ecology in Los Angeles, that it amounted to none at all. Wetlands set aside to absorb seasonal floods don't pay taxes. Neither do parks. So when, in 1930, landscape design scion Frederick Law Olmsted Jr. and urban planning pioneer Harland Bartholomew presented a park master plan for Los Angeles that incorporated flood zones, noting that the land could serve for recreation during dry seasons, the Chamber of Commerce rejected it.

Slowing development was another option. But the opposite happened: Pushed by Southern California property barons, the federal Bureau of Reclamation agreed in 1928 to build what became Hoover Dam, near a then little-known Nevada railway town called Las Vegas. While this Mojave colossus wouldn't stop floods in L.A., it would provide all the water needed to keep building houses across the Los Angeles Basin. In 1936, part of the old Baldwin ranch was sold to a real estate syndicate led by Los Angeles Times publisher Harry Chandler. Reporting the acquisition, the Times extolled two things: old oaks and new water. "Winding drives among its oaks will lead to residential sites of from one to five acres, each marked out to include some of the noble trees."

The "noble trees" were coast live oaks, trees that are to the L.A. foothills what redwoods are to Mendocino. Back in Baldwin's day, oak woodlands provided the region's air-conditioning system. But as his land was divided up, housing tracts replaced the oaks. Five-acre lots advertised in 1936 became third-of-an-acre lots by 1951. To line the new suburban streets, post World War II subdividers planted lawn-friendly and water-hungry tropical trees. New, sun-drenched "ranch homes" had plate-glass windows along with plenty of power from Hoover Dam to run the now-necessary air conditioning.

Just before Colorado River water began flowing to Los Angeles in 1939, a series of catastrophic floods killed more than 100 people. Nobody wanted that in the real estate section of the newspaper. Aided by federal dollars and the U.S. Army Corps of Engineers, the Los Angeles County Flood Control District began building what Orsi's Hazardous Metropolis describes as "a Maginot line of debris basins along the front of the foothills." Beyond these stadium-sized catchments, rivers were narrowed, deepened, paved and fenced. The entire floodplain was fitted with curbside storm drains that fed into the paved rivers. The upshot: a Los Angeles County Flood Control District empire of not only 14 dams and 162 debris basins, but also 500 miles of channelized former river and 3,035 miles of storm drains.

May 14, 2012 05:37 PM
HCN you have done us all a great service publishing a very important story about the oak woodland and the sediment dump. I consider myself a member of the "environmental" community in southern California, and I am a avid HCN reader. It is good to see a piece focused, not only on southern California, but actually zeroed in on the belly of the beast... L.A. The cover story at that! Emily Green is a superb writer and her treatment of the history of land use, policy, real estate development, and population explosion, as they relate to our ecology, climate, weather, and mind-set was truly enlightening.

This story was all the buzz when the bull dozers were a-rollin', but no one gave it the perspective you did over a year later, with the narrative explaining how it is we got 10 million people to fit at the base of erosive mountains, and the after-story... where to go from here. How do we deal with a flawed old plan, based on our new values?

Yours is the first, and to my knowledge the only, big-picture piece on this. Once again HCN provides excellent journalism coming technically as an "out-of-town" outfit, (and by the way, there's no shortage on news outlets in L.A.), but right on the mark for evocative accuracy. Congratulations.

Of course we're talking about much more than a few acres of old oaks & sycamores. Ms. Green put real people, emotions, even motives into the story. Great symbolism as well... all you planners, advocates, thinkers, students of policy and environment, take heed of what's' going down in L.A. Stuff happens pretty fast out here.

I will definitely be pointing many people to this article, and for some of them it will be their first glimpse at HCN. Keep up the good work and thank you.

Mike Evans
Tree of Life Nursery
San Juan Capistrano, CA
garry george
garry george
May 15, 2012 09:19 AM
This is a great article by Southern California's best writer on the ongoing complicated disconnect between our unique natural ecology and our desire to control it. She doesn't just see the issue as dams versus trees, but weaves humans and their actions into an ecology that includes soils, flowers, leaves, roots, bats and birds and a history of the growth of our region. Think Chinatown written by E.O. Wilson. My takeaway is that activism is best served early before the decisions are made, and we can't assume anything around us is protected until we see it in writing.
Cynthia Barnett
Cynthia Barnett
May 15, 2012 12:31 PM
Only western water journalist Emily Green could explain the sediment dumps of Los Angeles with flair & show readers so clearly & irrefutably the ecological and human impacts of our paved rivers, bulldozed lands, reliance on storm drains. She's right up there with John McPhee in her ability to uncrack the codes of compliance and engineering and show us what they have really wrought. Good for you, High Country News, for supporting this depth. Pls hire her to dig into Cadiz next.
Joshua Link
Joshua Link
May 17, 2012 11:08 PM
By publishing such an indispensable, comprehensive account of an issue that has been all but forgotten by local news organizations, HCN has filled a critical role in keeping an accurate narrative of the sediment management issue in Los Angeles alive and well. As Emily Green has so eloquently explained, despite its hardened reputation, L.A. still has wild places worth fighting for. This overdeveloped, resource-hogging, behemoth of a metropolis has lessons to share and many to learn from its Western neighbors. Thank you HCN for including us in the conversation and thank you Emily Green for yet another compelling piece.

Joshua Link
Los Angeles
Jessica Hall
Jessica Hall
May 27, 2012 10:09 AM
I'm really grateful to HCN and Emily Green for this thoughtful piece. This round of the sediment management plan won't provide a sustainable solution to the problem - but now is a good time to make the case for long-term solutions, and for that we're going to have to rethink the flood control system, or rather, remember it as a functioning riparian ecosystem - and find some managed middle ground that lets gravity do its emissions-less and free work of moving sediment downstream, and regain the attendant benefits of a natural or at least semi-natural stream (a nice place to hang out! aquifer recharge! fish! improved water quality!). There are channelized reaches of rivers and streams that maintain basic riparian functions already around (Glendale Narrows/LA River, San Jose Creek, Las Virgenes Creek to name a few) demonstrating that we can do it technically. Enough people are going to have to understand and see the relevance of this to LA's sustainability (the key: water resources) for it to gain traction politically.
Emily Green
Emily Green
May 27, 2012 12:22 PM
To follow the inch-by-inch struggle to restore LA's waterways, please check out Jessica Hall's and Joshua Link's website LA Creek Freak.


Whereas I took a deep breath to do a big piece, Jessica and Josh have followed this issue blow by blow, in real time, for years. I recall from one of their posts the wonderful headline "It's sedimentary, my dear." Hall is such a basic source that she was the first person I called when considering taking on this story.

To appreciate the monumental challenge any environment writer or activist bloggers such as Hall and Link face in getting Los Angeles to consider restoring at least some flood plain function to the flood plain, it helps to know that due to the inversion layer and LA's famous smog, on most days, most Angelenos can't even see the mountains surrounding their basin. This even though the distance from Los Angeles Harbor to LA River headwaters in the Rio Hondo tributaries is only 40 miles. Fewer still of LA County's 10 million and counting are aware that LA even has rivers, albeit radically altered ones. The channels are rarely glimpsed from freeway overpasses and downtown bridges. Is the woodland/river/sediment cause a winnable battle? Ultimately, the mountains will prevail but at what cost and when are by no means clear. It does not look good. But the only uncynical act is to hope that LA County and 88 cities on the flood plain work with landscape ecologists such as Hall and Link to make LA's lost rivers an ecologically functional and beneficial amenity rather than hopeless menace whose backlog will turn the foothills and National Forest into an ever-increasing network of sediment dumps.
Kent Lucas
Kent Lucas Subscriber
May 31, 2012 07:46 PM
Wow, this is some outstanding reporting. I was unaware of this dilemma facing Los Angeles. Nice job HCN and Emily Green. HCN is an invaluable resource.
Emily Green
Emily Green
May 31, 2012 08:03 PM
The Arroyo Seco Foundation, led by former Metropolitan Water District of Southern California Chairman Tim Brick, today issued comments on the draft strategic sediment management plan that

A) appears to have forced LA County to extend the comment period on the plan for another 90 days and

B) argues that "Sediment is not a waste product that should simply be disposed of, yet that is the approach taken by the Strategic Plan. Neither is storm water, another neglected resource. Six hundred thousand acre feet of storm water each year flow to the ocean from Los Angeles County, an invaluable resource that we need to better utilize. The management of the dams, debris basins and flood channels in Los Angeles County is critical to recovering some portion of that storm water."

When Tim Brick thunders, it should rain. He knows his H2O better than most engineers in LA County. MWD is the largest western water wholesaler outside of Reclamation. To read the entire statement, which also calls for a longer term, more holistic approach to sediment as part of overall watershed stewardship, follow this link

martin weiss
martin weiss Subscriber
Jun 01, 2012 08:49 AM
High Country News once again casts the light of consciousness across the landscape, and notes the shadows thrown as well as the sunshine. I await your words with eager anticipation. There is steel in your words of life.