Storm Drainage Manhole number 3 is detailed with a rim elevation of 1910.32 and multiple invert elevations including four incoming lines at 1902.87 and one outgoing invert at 1902.87. An upstream storm drain inlet designated SDDI-3 connects at station 39+06.69 with a top curb elevation of 1910.29 and an invert out of 1904.23. The profile indicates twenty-three linear feet of eighteen-inch reinforced concrete pipe carrying one cubic foot per second, alongside twenty-four linear feet of thirty-inch reinforced concrete pipe carrying thirty-six cubic feet per second. A pressurized eight-inch ductile iron pipe with an eighteen-inch steel casing crosses below maintaining an eighteen-inch minimum clearance. Finished grade and existing grade lines intersect at centerline with a one-hundred-year hydraulic grade line plotted across the profile.
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