The Meaning of Hahamongna

The original settlers of the region were sometimes called the Hahamongna Indians. The word means "Flowing Waters, Fruitful Valley" in the native Tongva language.

Hahamongna News


County to Start Work on Devil’s Gate





Dean Lee


The Pasadenan


County officials said Wednesday (March, 30), during a special meeting between the city council and Supervisor Michael Antonovich, they plan to start short-term maintenance work in 30 days at the Devil’s Gate Dam to protect the structure’s outlet valves from potential damage in the event of more flooding.The short-term plan still needs to go before the County Board of Supervisors later this month. The full scope of the plan was released in a report Friday and will be available for two weeks for public review. “This will allow us to continue to operate our facility, we monitor storms and make releases from the dam,” said Los Angeles County Planning Deputy Edel Vizcarra. “This will allow us to do that until the larger sediment project is completed.”

David Pliker, the County Department of Public Works’ Principal Engineer further explained, “The Station Fire coupled with the rains brought down a lot of dirt and the valves are currently covered. We need to do something so public works has the ability to control the water flow.” Friday’s report will also be given to all impacted cities including, South Pasadena, La Canada, Altadena, and Pasadena, as well as environmental groups such as the Sierra Club and Friends of Hahamongna. Vizcarra said about 1.6 million cubic yards of material needs to be removed during the larger sediment removal project. The board of supervisors voted March 1 to conduct a full Environmental Impact Report for removal. Vizcarra said the EIR would look at the removal and disposal methods including the use of tucks something environmentalists have said they are concerned with. “We would do what we call dry weather removal,” he said. “When the storm season comes we shut down, after the next storm season we continue.”Vizcarra said after the Station Fire they accumulated eight feet of sediment when normally they see six or seven inches a year.Pliker said Antonovich had asked that a regional taskforce be setup including environmental groups, stakeholders, and experts in water management.“1.6 million yards is a lot of material,” Vizcarra said. “How can you best use it, can you recycle it? Use it for beach replenishment? There are a number of things you can do with it.Pliker said the Devil’s Gate is one of 14 major dam facilities in LA County including one in Arcadia where protesters made headlines after trying to stop the County Department of Public Works from removing old-growth oak trees as part of a sediment removal project.