Beware Oaklanders! The land beneath your feet may not be as stable as it seems. Below is a listing of Oakland's urban landslides over the years. (H/T to Oakland Geology blog.)
A "dozen homes were heavily damaged" and 7 families vacated their homes in a slide in 1926; possibly further damage in 1927. The movement of the earth broke the sewer line between the houses between the 700 block of Lerida and Calmar Avenue. A unknown number of homes were lost. Neighborhood rumor says one house slid down into the street, and was subsequently rotated 180' and relocated to the opposite side of the street.
Lerida Avenue was renamed Balfour because of the notoriety. The 1936 map shows the part below Rosal Avenue named Balfour and the rest still named Lerida; by the 1950 map it is all named Balfour. See City Will Bore to Find Cause of Lerida Slide Oakland Tribune, February 22, 1926. In 1927 the city spent $17,000 to install a drainage system where the broken sewer line had been.
As current evidence of the earth's movement, there's extensive displacement on the pedestrian stairway that runs uphill from Balfour to Calmar. For some ninety years, the lots where homes had been lost remained vacant - but the boom in prices and demand for new housing is now resulting in new construction.
|1934||McKillop Road||A "massive landslide" 1 occurs as a large chunk of the west bank of Sausal Creek washes away and McKillop Road is cut in two. Looking at property maps, it appears that 11 homes were affected. W.D. Wood Park is founded on the remains of the slide.|
|1956||Doncaster Place||Mudslide swept a house down the hill. Widespread flooding. 10|
|1962||widespread||Series of storms led to flooding and landslides all over Oakland. One fatality on Kimberlin Heights Drive, damage all around Oakland 7|
|c.1966||Chelton Drive||6177 and 6163 Chelton Drive "are as good as gone". One house may have been designed by Beverley Thorne. (ref)|
|1970||Area between Jordan Road, London Road, and Kitchener Court.||A large slide takes out a section of London Road and 14 homes just below the Mormon Temple. The area is still uninhabitable. 2|
|1982-1983||Armour Drive + Snake Road||A major slide destroyed four homes, and Armour Drive was closed.|
|1998||Rettig Avenue||El Niño storms cause a landslide that blocks the street and covers the bank of Peralta Creek.3||
|1998||Armour Drive + Snake Road||Two homes, 6757 Snake Road and 6801 Snake Road were destroyed in a slide. 8,9|
|2002||Wallace Street||A prolonged wet spell causes a month-long, slow motion mudslide that results in the red-tagging of several homes overlooking 14th Avenue.4||
|2006||McKillop Road||After seventy years, the unstable ground near McKillop starts to move again, resulting in the destruction of several more homes.5|
|?||San Luis Avenue and Dolores Avenue||Does anyone know about this one? There appears to be a slump and several vacant lots.|
|2005–2006||Armour Drive + Snake Road||A large slide below Snake Road permanently closed part of Armour Drive and destroyed at least one house. Despite this, they're building a new house in 2014!|
|2012-1-21||Wild Currant Way||Wet weather may have caused a water main break. Wet weather collapses road in Oakland Hills on KTVU|
|2012-5-5||Near Sheridan and CA-13||Caltrans is spending approximately $7 million to repair damaged caused by a slide along the former Sacramento Northern right of way.6||
|2017-04/05||Montclair Railroad Trail||Two separate slides blocked the trail. One at the Melin Cut, and another closer to Bishop Ct.||
Charles H. Lee was a hydraulic engineer who worked for the USGS, the city of Los Angeles, and others, as well as having private practice. Lee wrote about numerous aspects of water history in California. He wrote a booklet about the Lerida Avenue slide, and another about the McKillop Road slide.
Links and References
- Background on Geologic Hazards in the City of Oakland oaklandnet.com
- The Sausal Creek Watershed, A Cultural and Natural History
- The Kitchener Scarp on Oakland Geology
- Storm threatens homes in Oakland SFGate.com March 8, 2002
- Urban Landslides - An Oakland Case Study
- California Transportation Commission vote summary for October 24, 2012 (see bottom of page 5)
- City Faces $400,000 Flood Suits Oakland Tribune January 31, 1963
- Sliding Oakland Hills Home on Verge of Demolition San Francisco Chronicle January 28, 1998
- California’s next worry: mudslides from El Niño rains San Francisco Chronicle October 23, 2015 (note video footage of Snake Road)
- Rains Deal Havoc in North Calif. Oakland Tribune January 16, 1956