This civil profile detail shows a storm drainage manhole designated as SDMH-10 with a locking lid located at station 12+47.69, offset 12.50 feet right, featuring a rim elevation of 1901.76, an invert in of 1897.53, and an invert out of 1897.53. A connected drop inlet features a bolt-down grate located at station 12+25.03, offset 35.23 feet right, with a top of casting elevation of 1901.91 and an invert out of 1898.64. The utility alignment carries 33 linear feet of reinforced concrete pipe with an 18-inch storm drain sloped at 3.45 percent, handling a 100-year flow rate of 2 cubic feet per second. A proposed 12-inch ductile iron water line crosses below with an 18-foot clear separation. The drawing also denotes proposed and existing finished grades at the centerline and a 100-year hydraulic grade line.
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