│ │ │ │ │ │ │ │ │ Burnside │Kentucky │Tennessee │3.7│37.3│ .019│ 9.2│ 300│ 0.5│ 16 │ │ │ │ │ │ │ │ │ Tennessee│Burnside │Elm │3.4│88.8│ .015│10.2│ 280.│ 0.5│ 17 Elm │Above │Chetwood │ │ │ │ │ │ │ 18 │ Chetwood│ │ │ │ │ │ │ │ Elm │Chetwood │Albemarle │4.6│ 5.1│ .020│ 5.3│ 480│ 1.5│ 19 │ │ │ │ │ │ │ │ │ Elm │Albemarle │Tennessee │4.3│15.8│ .012│ 6.1│ 410│ 1.1│ 20 │ │ │ │ │ │ │ │ │ Tennessee│Elm │Varennes │3.4│ 102│ .012│10.2│ 180│ 0.3│ 21 │ │ │ │ │ │ │ │ │ Varennes │S. │Georgia │4.4│ 7.7│ .012│ 5.2│ 270│ 0.9│ 22 │ Carolina│ │ │ │ │ │ │ │ Varennes │Georgia │Florida │4.2│14.5│ .010│ 5.7│ 300│ 0.9│ 23 │ │ │ │ │ │ │ │ │ Varennes │Florida │Kentucky │4.1│21.4│ .017│ 7.7│ 300│ 0.6│ 24 │ │ │ │ │ │ │ │ │ Varennes │Kentucky │Tennessee │4.0│27.8│ .015│ 7.8│ 300│ 0.6│ 25 Tennessee│Varennes │Boulevard │3.3│ 108│ .012│10.2│ 230│ 0.4│ 26 Tennessee│Boulevard │Outlet │ │ │ │ │ │ │ 27 │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ 28 │ │ │ │ │ │ │ │ 29 │ │ │3.3│ 117│Areas No. 1–5 inclusive │ 30 │ │ │ │ │ │ │ │ │ ─────────┴──────────┴──────────┴───┴────┴─────┴────┴───────┴─────┴────── The time of concentration in minutes is assumed by judgment for the first area. For all subsequent areas it is the sum of the time of concentration for the area or areas tributary to the inlet next above and the time of flow in the sewer from the inlet next above to the inlet in question. For example, in line 2 the time 8.1 minutes is the sum of 7.0 minutes time of concentration to the inlet at the corner of State and North Carolina St., and the time of flow of 1.1 minute in the sewer on State St. from North Carolina St. to South Carolina St. Where two sewers are converging as at the corner of Varennes Road and Tennessee St. the longest time is taken. For example, the time of concentration down Varennes Road to Tennessee St. is shown in line 25 as 11.4 + 0.6 = 12.0 minutes. The time to the same point down Tennessee St. is shown in line 21 as 16.2 + 0.3 = 16.5 minutes. This time is therefore used in line 26. _R_, the rate of rainfall in inches per hour is determined by Talbot’s formula.