Puente Narrows Underflow
Puente Narrows Underflow
Each year, a third-party firm measures the subsurface flow passing from the Puente Basin to the Main San Gabriel Basin.
Data is gathered by taking measurements from two wells in the basin, upstream well 2S/10W-9Q, and downstream well 2S/10W-8E3. The annual reports are available here:
Puente Narrows Underflow FY 23-24
Puente Narrows Underflow FY 22-23
Puente Narrows Underflow FY 21-22
Puente Narrows Underflow FY 20-21
Puente Narrows Underflow FY 19-20
Puente Narrows Underflow FY 18-19
Puente Narrows Underflow FY 17-18
