Cal. Fish & Game Code § 5989

After acceptance, should the screen fail to function in an efficient manner, no changes in conditions affecting its operation having occurred subsequent to the acceptance of the screen, the owner shall not be required to install a new screen. However, the department may install another screen at the sole cost and expense of the department of a type, size, mesh, and at a location agreed upon by the department and the owner, or approved by the Department of Water Resources, as provided in Section 5992 of this code.