<p>SACRAMENTO(AP) - Regional water quality control boards are adding requirements for timber companies, pre-empting state regulators they say aren't doing enough to protect California's rivers and streams.</p>
<p>Some water boards have approved and others are considering a policy that imposes additional protections for streams and stream banks, for logging roads and stream culverts that typically cause erosion, for erosion-prone steep slopes, for clear-cuts, for endangered and threatened species like salmon, and allow for additional inspections of logging sites.</p>