In 2007 the City of Pasadena notified Jet Propulsion Laboratory (JPL) that they had to leave their "east parking lot" in Hahamongna Watershed Park because of the priceless value of the habitat and water resources on the site.
JPL then built a $25 million parking lot on the east side of their campus and moved out of the streamzone
when their lease expired on June 30, 2013. Much of the asphalt and other parking facilites were also removed at that time.
But now they're back. Through some secret arrangement with the City of Pasadena, hundreds of cars are parking at the mouth of the canyon again.