Regional Jet 200 ER/LR (CRJ200)
Flight Crew Air Transport Pilot (ATP)
Situational Awareness
Deviation - Altitude Overshoot; Deviation / Discrepancy - Procedural Clearance; Inflight Event / Encounter CFTT / CFIT
Air Traffic Control Issued Advisory / Alert; Flight Crew Became Reoriented
Human Factors
We had been cleared by Approach at 3;000 feet on the downwind to conduct a visual approach to 4L and BTR tower had then cleared us to land. I had made a base turn and had lined up approximately a heading of 355 degrees to intercept the 5 mile fix for 4L. I was leveling off at 1;500 feet AGL approximately 2.5 miles from the fix and had called for flaps 45 and Before Landing checklist when Tower informed us they had a Low Altitude Alert. The highest obstacle in that area close to my flight path on the approach chart (for reference I had looked at RNAV 4L) was 817 AGL; east of the river.Tower informed us that the minimum altitude was 2;800 feet MSL (2;700 AGL) in that area so I climbed up to approximately 2;500 feet and by this time was squarely lined up on the centerline and 1.5 miles behind the 5 mile fix.We completed the checklist and completed a stable visual approach and landing to 4L.
CRJ-200 Captain reported he was advised by ATC of a low altitude alert on a visual approach to BTR.