Notes:Costar Way
From Pittsburgh Streets
See also Notes:Ryolite Way.
Source:Rh-negley-plan (1871): "Alley 20′"
Source:James-parker-plan (recorded 1875): "20′ Alley"
Source:Ordinance-1880-1881-33: "Corona alley, from Jackson street to McCully street [Wellesley Avenue], Nineteenth ward."
Source:Hopkins-1882 shows this alley (Jackson to McCully) unlabeled; R. H. Negley's and J. Parker's plans of lots.
Source:Ordinance-1909-1910-715: "Corona ay., from Sharp ay. to Wellesley av., old 19th wd., changed to Costar ay., 11th wd."
Source:Ordinance-1912-318: "Costar alley, from Livery alley south, Eleventh ward, changed to Cosmo alley." This eventually became the northernmost part of Ryolite Way.
