The California Gold Rush had a great impact on the environment. One thing that had an impact on the environment was hydraulic mining. Hydraulic mining had an impact on the environment because it used high pressurized water to destroy mountainsides and to break down rocks destroying the environment and causing mudslides. Also, hard-rock mining broke down caves, caverns, and mountains. Coyote mining also had an effect on the environment because it broke up the soil, rocks and made huge holes in the ground. The American miners had polluted the Native Americans’ streams, destroyed the wildlife by cutting down trees and scaring away animals. Also, the miners littered and didn’t throw away trash. The miners also cut down trees for building buildings which destroyed the animals’ environment and destroyed the plant life. The miners did a lot that affected the environment.