Date: 201910
Local time of day: 1201-1800
Location: ZZZ.Airport, US
Flight conditions: VMC
Light: Daylight
Aircraft: Regional Jet 900 (CRJ900)
Operator: Air Carrier
Operating under: Part 121
Flight plan: IFR
Mission: Passenger
Flight phase: Descent; Parked
Airspace: Class B ZZZ
Reporter organization: Air Carrier
Reporter function: Captain; Pilot Not Flying
Reporter qualification: Flight Crew Multiengine; Flight Crew Instrument; Flight Crew Air Transport Pilot (ATP)
Human factors: Situational Awareness; Workload; Fatigue; Communication Breakdown
Anomaly: Deviation / Discrepancy - Procedural Published Material / Policy; Inflight Event / Encounter Fuel Issue
Detector: Person Flight Crew
When detected: In-flight
Result: Air Traffic Control Provided Assistance; Flight Crew Landed in Emergency Condition; Flight Crew Requested ATC Assistance / Clarification
Contributing factors: Human Factors; Procedure
Primary problem: Human Factors

Narrative: During boarding in ZZZ. The First Officer and I were running the before start checklist. When we got to the fuel. We noted that the aircraft was in fact being fueled. And agreed that we would come back to the fuel. At departure time we still did not have the bag sheet and began to inquire as to where that was. In that time we got distracted and did not come back to the fuel. We did notice that fueling was complete because the auto cross flow inhibit status message was gone. In the time looking for the bag sheet I did not check the fuel load against the release. I took for granted that the fueler had the right load. I have since learned that he was giving the wrong fuel load. I let myself get distracted with trying to get out on time. And did not come back to confirming the fuel. I sent Dispatch a message as to our late door closure due to the late bag sheet. Which must have added to my distraction. About 100 miles from ZZZ1 we got the low fuel caution We [advised ATC] and requested direct to ZZZ2 landing Runway XXR. A gradual decent was started at flight idle in an effort to minimize throttle and make the necessary altitude crossings on the approach to Runway XXR. We landed without further incident and taxied to the gate.I let myself get distracted with getting the flight out on time. I should have restarted the checklist after the fuel was done instead of planning on coming back to it. Which I did not do. I did not sleep that well the night before. So I was possibly more tired than I thought I was. I assumed that the fueler had the correct fuel load Which he did not. I know I looked at the fuel; but I clearly did not notice that it was incorrect. Why it did not register with me to check against the release I am unsure. Or if I simply saw a number that looked right. But I should have not let myself get distracted with the other factors and focused on completing the checklist properly. And should have admittedly myself that I may have been more tired than I thought and taken a moment to double check everything. It is something that I will never forget. And never let happen again.




Synopsis: CRJ-900 Captain reported deviating from the before start checklist fuel section resulting in a Low Fuel warning and a diversion.