ASARCO Ray Mine Big Box Lake Dredging

Pinal County, AZ

Big Box Dam was constructed in the early 1970’s north of the Ray Mine to control flooding of downgradient mine facilities. After a large fire in 2021, three large storm events resulted in an inflow of sediment and debris, which filled Big Box Lake with sediment to 50% of the total height of the Dam.  Bowman is providing construction management services that includes mechanical dredging of approximately 1M cubic yards of sediment, haulage, and disposition of dredged materials to a stockpile area 1.75 miles from the reservoir dam.