Expands the department of ecology's water right cost-reimbursement agreement program.

Requires the department to: (1) Establish a list of certified water right examiners; and

(2) Provide electronic notice and opportunity for comment to affected federally recognized tribal governments concurrently when providing notice to certain applicants.

Authorizes the department to: (1) Determine that no water remains available for appropriation from a water source and provide notification to pending applicants of the water source; and

(2) Hire contractors who will investigate the disposition of a water right application.

Clarifies how a water right claim may be changed or amended.