Commercial Fixed Wing
ATC Issue All Types; Conflict NMAC
Flight Crew Requested ATC Assistance / Clarification; Flight Crew Took Evasive Action
Human Factors
Departed 13R; cleared for TO on the Alamo 3 depart; RWY heading to 5;000 ft. A few minutes later; climbing through 1;200 ft. I noticed an airplane on the nose. At first I thought it was a big airplane some distance away but quickly saw that it was a high wing Cessna on a reciprocal heading. I pointed the Cessna out to the First Officer and I started a left turn to avoid it around 1;500 ft. and we got an RA to level off below 2;000 ft. followed by a RA to descend. (We never got a 'traffic' alert or warning.) First Officer noticed minimum vertical separation of 300 ft. I estimate that our minimum horizontal clearance was less than a mile. This all happened as Tower switched us to departure - which was about the same time as I acquired the Cessna. First Officer radioed departure on 127.10 that we were deviating for the traffic and following a TCAS - RA. When clear of traffic we turned back to original heading and resumed climb to 5;000 ft. Departure control resumed vectors. We reported the near miss and controller agreed that they would be reporting it. Controller stated something about the Cessna doing survey work in patterns in that area. There were no NOTAMS or other notices that we were aware of or could find. Flight continued to destination without further incident.We were unaware of a Cessna transiting through our departure track.Departing Aircraft should be informed of airplanes transmitting their departure path.
Captain reported a NMAC while climbing on their departure.