Super King Air 200
Flight Crew Instrument; Flight Crew Multiengine; Flight Crew Air Transport Pilot (ATP); Flight Crew Flight Instructor
Flight Crew Last 90 Days 63; Flight Crew Total 8455; Flight Crew Type 967
Conflict Ground Conflict; Less Severe; Ground Event / Encounter Other / Unknown
Airport
During takeoff I experienced an dramatic 'dip' in the middle of the runway at Alturas (KAAT).  This little imperfection has been here for a while; however it is getting much more dramatic.  It is to the point that it may cause enough force on a retractable gear airplane to collapse the nosewheel.  The VASI had been out of service for two years.  Now it has been decommissioned for some reason.  This is a safety hazard to have a non-precision approach at this airport with no way to safely transition to the runway environment.
Air taxi pilot reported the Alturas airport has a depression in the runway and the VASI has been out of service.