Those parts of Erie, Genesee, Monroe, Niagara and Orleans Counties lying within a continuous line beginning at the intersection of Route 31E and Route 31 near Middleport; thence westerly along Route 31 to Griswold Street; thence southerly along Griswold Street to Ditch Road; thence southerly along Ditch Road to Foot Road; thence southerly along Foot Road to the north bank of Tonawanda Creek; thence westerly along the north bank of Tonawanda Creek to Route 93; thence southerly along Route 93 to Route 5; thence easterly along Route 5 to Crittenden-Murrays Corners Road south of Akron; thence southerly along Crittenden-Murrays Corners Road to Alden-Crittenden Road at Crittenden; thence southerly along Alden-Crittenden Road to Route 20 at Alden; thence easterly along Route 20 to Route 19 near Pavilion Center; thence northerly along Route 19 to the New York State Thruway (IR 90); thence easterly along the Thruway to the west bank of the Genesee River near Scottsville; thence northeasterly along the west bank of the Genesee River to the south bank of the Barge Canal near Rochester; thence northwesterly along the south bank of the Barge Canal to Manitou Road south of West Greece; thence southerly along Manitou Road to Route 31; thence westerly along Route 31 to Route 31A near Brockport; thence westerly along Route 31A to Route 31 (Maple Ridge Road) at Medina; thence westerly along Route 31 to the point of beginning.