(

a) The Legislature hereby finds and declares all of the following:

(1) Mill Creek and Deer Creek possess extraordinary resources in that they support one of the few remaining viable populations of wild spring-run chinook salmon in the Sacramento-San Joaquin River system. One essential component of the resources provided by these creeks is their exceptional water quality.

(2) Based on a review of comprehensive technical data, the Legislature has determined that potential beneficial uses must be balanced to achieve protection of the unique fishery resources and existing water rights of Mill Creek and Deer Creek in the manner specified in this section. In lieu of including Mill Creek and Deer Creek in the system, the continued management of stream resources in their existing natural condition consistent with the terms of this

section represents the best way to protect the unique fishery of Mill Creek and Deer Creek. Maintaining the existing free flowing conditions of Mill Creek and Deer Creek to protect their fisheries is the highest and most beneficial use of the unappropriated waters of Mill Creek and Deer Creek within the segments designated in subdivisions (

b) and (c), and is a reasonable use of water within the meaning of

Section of

Article X of the California Constitution. (

b) No new dam, reservoir, diversion, or other water impoundment facility shall be constructed on Mill Creek from the headwaters of East Sulphur Creek within

Section T30N R4E to the United States Geological Survey gauging station in the northeast quarter of the northwest quarter of

Section T25N, R1W. (

c) No new dam, reservoir, diversion, or other water impoundment facility shall be constructed on Deer Creek from the headwaters in

Section T27N R5E to the United States Geological Survey gauging station in the northwest quarter of the northeast quarter of

Section T25N, R1W. (

d) Except for the maintenance of existing flood control facilities and projects by public agencies or private landowners or emergency flood control activities or repairs required due to acts of God, provided that those activities or projects do not interfere with the passage of migrating anadromous fish, no state agency shall assist or cooperate with, whether by loan, grant, license, or otherwise, any agency of the federal, state, or local government in the planning or construction of any dam, reservoir, diversion, or other water impoundment facility that could have an adverse effect on the free-flowing conditions of Mill Creek and Deer Creek, or on their wild runs of spring-run chinook salmon. (

e) All state agencies exercising powers under any other provision of law with respect to the protection and restoration of fishery resources shall continue to exercise those powers in a manner that protects and enhances the fishery of the segments designated in subdivisions (

b) and (c). In carrying out this subdivision, any exercise of powers shall be consistent with

Section 5093.58. (

f) Nothing in this

section shall prejudice, alter, affect in any way, delay, or interfere with the implementation or construction of any fishery restoration or improvement project that is authorized, required, or recommended pursuant to the Central Valley Improvement Act (Public Law 102-575) or the Upper Sacramento River Fisheries and Riparian Habitat Management Plan developed pursuant to

Chapter of the Statutes of 1986, or of any other fishery restoration or improvement project. (

g) Nothing in this

chapter shall prejudice, alter, affect in any way, delay, or interfere with existing water rights; implementation of those rights; historic water use practices; and replacement, maintenance, repair, or operation of diversions and diversion facilities; or changes in the purposes of use, places of use, points of diversion, or ownership of existing water rights, except that no change shall operate to increase the adverse effect, if any, of the preexisting diversion facility or place or purpose of use upon the free flowing and natural character of the stream.