Information on creek flows and conditions available here:
Arroyo Mocho Flow Status: March 14, 2013
Water supply releases into the Arroyo Mocho to facilitate groundwater recharge were discontinued March 14th 2013 thru March 20th as the California Department of Water Resources worked on the South Bay Aqueduct (SBA). Water supply releases resumed on March 20th 2013.
Arroyo las Positas Trail access January 31, 2013
A new Livermore to Pleasanton Arroyo Trail was opened on January 31, 2013 that provides an opportunity to view the Fish Ladders on the Arroyo las Positas. The trail connects Jack London Boulevard from Isabel Avenue west to El Charro Road. The trail was a City of Livermore Project funded by a State of California Prop 84 Grant. The trail crosses the Arroyo las Positas Fish Ladder and provides trail access along the lower reach of the Positas as it joins the Arroyo Mocho. The lower Arroyo las Positas is a good example of an engineered flood protection channel with adjacent storm detention basins and a vegetated stream reach. Downstream, another fish ladder is visible on the Arroyo Mocho that was designed to allow steelhead trout to access the potential habitat on the upper Arroyo Mocho. The large concrete lined pond at the confluence of the Arroyo las Positas and Arroyo Mocho is designed for sediment management and will collect the silt and gravel that naturally flows down the channels during high flows. The concrete liner and adjacent concrete road was constructed as a designated silt removal area. This City of Livermore trail project completed in January 2013 is scheduled to connect to the City of Pleasanton Arroyo Mocho Trail in Pleasanton in the Fall of 2013. This will allow bicycle and pedestrian access all the way west along the Arroyo Mocho to the confluence of the Alamo Canal and the Arroyo de la Laguna in Pleasanton.
Arroyo Mocho Flow Status: November 9th thru November 20th, 2012
Water supply releases into the Arroyo Mocho to facilitate groundwater recharge will be discontinued from November 9th thru November 20th as the California Department of Water Resources works on the South Bay Aqueduct (SBA). Releases into the Arroyo Mocho from the SBA may continue after November 20th with releases ranging from 5-12 CFS, but may have occasional interruptions associated with operation of the State Water Project, and local rainfall and natural runoff conditions.
Arroyo Mocho Flow Status: September 5, 2012
Water supply releases into the Arroyo Mocho to facilitate groundwater recharge have continued through August with flows ranging up to about 20 cubic feet per second (CFS), and releases of about 5-12 CFS are expected to continue through September, but may have occasional interruptions associated with operation of the State Water Project, local mining activities, or local construction activities.
Arroyo Mocho Flow Status: July 3, 2012
The Arroyo Mocho is off July 3rd but will resume on July 4th at a low rate of about 5 cubic feet per second (CFS). Flows maybe increased to about 15 CFS over the weekend and through the week of July 9th. Flows of about 15 CFS are scheduled to comitnue throughout the summer with occasional interruptions.