Alma sits over the Western Region and the coal there is medium and high volatile bituminous, worked underground in many places. The USGS coal fields map is drawn at a small scale, so it shows the ground, not a parcel.
Nothing at all is on record inside the town limits: no mine, no shaft, no adit and no pit. That is what the files say, and it is not a clearance. Those files record a working only where one was catalogued or drawn on a survey sheet, and on coal ground the sheets are thin: the maps that show the rooms and the pillars are held by Missouri Mine Map Repository (Missouri Geological Survey) and that office is where to ask for them.
Missouri abandoned mine maps ranks every county and town in the state by the workings recorded inside it, names the office that holds the mine maps, and says what to do if the ground moves.
Disclaimer: The mine information here is for general information only. Old mine records can be incomplete, outdated or wrong, and finding nothing here does not mean there is nothing there. Check with the mine map office named here before you rely on it, and have a qualified engineer look at any ground you are worried about. PublicRecordCenter.com assumes no responsibility or liability for any errors, omissions, or consequences arising from the use of this information.