Paper Mill Road from Gunpowder Falls to Jacksonville was constructed as a  wide concrete road by 1915. This road was widened and resurfaced in macadam from the eastern edge of the Loch Raven Reservoir park reservation at Phoenix Road to Old York Road west of Jacksonville around 1933.
The passage describes the evolution of Paper Mill Road's construction from a concrete road to a wider one paved with macadam. The timeline highlights the two phases of this development: initial concrete paving in 1915 and subsequent widening and resurfacing around 1933.