Date: 201710
Local time of day: 1201-1800
Location: RDM.Airport, WA
Flight conditions: VMC
Light: Daylight
Aircraft: Commercial Fixed Wing
Operator: Air Taxi
Operating under: Part 91
Flight plan: IFR
Flight phase: Climb
Airspace: Class E ZSE
ATC / advisory: Center ZSE; Tower RDM
Second aircraft: Small Aircraft; Low Wing; 1 Eng; Fixed Gear
Reporter organization: Personal
Reporter function: Pilot Flying; Captain
Human factors: Communication Breakdown; Situational Awareness
Anomaly: ATC Issue All Types; Conflict NMAC; Deviation - Track / Heading All Types; Deviation / Discrepancy - Procedural Clearance; Deviation / Discrepancy - Procedural Published Material / Policy
Detector: Person Flight Crew
When detected: In-flight
Result: Flight Crew Requested ATC Assistance / Clarification; Flight Crew Took Evasive Action
Contributing factors: Airspace Structure; Human Factors; Airport; Procedure
Primary problem: Procedure

Narrative: I was departing [and] cleared to climb to 11;000 feet and issued no traffic alerts. I was climbing out on the departure and under radar contact with Center. I was climbing through 2000 feet and turning on the ATC assigned course. I looked up to find a single engine low wing aircraft at my 12 o'clock and above somewhere between 300-500 feet and descending into me. I modified my course to the right and off my assigned heading briefly to avoid a collision. No emergency existed at the time and my control inputs did not require aggressive maneuvering. However had I not noticed the aircraft we very likely would have collided as the aircraft was directly above me and we were converging into each other vertically.  I reported the contact to Center and they told me Tower should have notified me of the traffic. They were reportedly on a transition and descending which I could see as I climbed to the west of the traffic. I let them know that Tower had not notified me of the traffic and that I had adjusted my course to avoid the aircraft and was returning to assigned heading. I had turned off course roughly 30 degrees to avoid the traffic. I then contacted Tower and was told that they were told by Center that the traffic would be behind me and not a factor. They also informed me that they did not have radar and can only rely on reports from Center. This is the second close call I have had at the same airport departure. ATC did not alert me to traffic in the area. I was under an IFR clearance and in radar contact on an assigned heading with Center.  The controller did not notify me of traffic in close proximity to me and I had to maneuver to avoid the traffic. In this case; as well; there was no urgency of a collision but had I not noticed the aircraft we likely would have collided. There seems to be a need for better traffic monitoring on the approach Class Delta airspace. In roughly a month; I had two close calls that required maneuvering to avoid a collision. I would suggest a remote radar visibility or an actual radar at the airport or adjust the approach away from the departures.




Synopsis: A pilot reported; twice; recently they were on a departure and had to take evasive action to avoid adjacent airport traffic that ATC did not advise them about.