Small Aircraft; Low Wing; 1 Eng; Retractable Gear
Air Traffic Control Fully Certified
Air Traffic Control Time Certified In Pos 1 (yrs) 4.3
Confusion; Situational Awareness
ATC Issue All Types; Airspace Violation All Types; Deviation / Discrepancy - Procedural Published Material / Policy
General None Reported / Taken
Airspace Structure; Chart Or Publication; Procedure
Aircraft X was requesting the RNAV 22 into SRB. His destination is at a point where there is a ZTL and ZID low sector. The IAF for the approach is just across the boundary inside ZID Sector 21. The aircraft was level at 5;000 and reported that he had the weather and NOTAMs for the field. After reviewing the NOTAMs myself; I issued a clearance to cross WOTEK at or above 4;400 and cleared for the approach. The MIA in the sector is 3;800 and approach plate had 4;400 so I issued 4;400. However; WOTEK is again just across the boundary where the MIA increases to 4;500. Since the aircraft was landing at its final airport; terrain alerts were already suppressed and I did not notice the issue until I had switched the aircraft to advisory. I did not attempt to have an aircraft relay through UNICOM because the aircraft had already passed the IAF and the event was already over. Traffic volume was average or above average. Complexity was a little bit higher because there was another approach in progress and I had an additional aircraft holding for an approach with the usual Nashville arrivals and departures. Sector 40 and 41 are combined 99% of the time. The approach plate should always be at least what the MIA is. It doesn't make any sense why it doesn't.
ZME Center Controller reported the RNAV Runway 22 Approach at SRB has an IAF altitude 100 feet lower than the minimum IFR altitude.