The last city directory listing I find is from 1914: Dave McDonnell - Propr Junction Saloon - basement 9th and Main and Delaware. 1906 is the earliest with that same listing. He does not show in the 1915 directory - Prohibition was definitely on the horizon, if not in effect in KCMO by then.
The 1900 directory has him and his saloon at 1631 Genesee.
The 1901, 02 & 03 directories have different-sounding addresses, but they probably are the same: David McDonnell, Jr. - saloon - Delaware ne cor 9th
Look at a map of the area and the three streets do intersect. Google StreetView shows a parking lot there today.
John in the Great 208