The chart is a HI/LO or just a HI?
MEA is the minimum en-route altitude of an Airway.
Airways have lower limits (both upper and lower airspace ones). The lower limit can be arbitrarily set. Radio reception and obstacle only limit the minimum MEA.
Upper airspace airways are not necessarily superimposed on a lower airspace airway. If there is no airway below, the upper airway lowest possible MEA is the upper airspace limit. FL245 is the limit between upper and lower airspaces in many countries so I bet this is the case.