Storm drainage manhole SDMH-13 features a rim elevation of 1904.38 and multiple invert elevations at 1896.15 connected to fifty-nine point four six linear feet of thirty-six inch reinforced concrete pipe at a slope of zero point nine nine percent. The civil profile indicates proposed riprap with a d fifty of six inches and thickness of twelve feet, alongside a one hundred year hydraulic grade line and finished grade at centerline. Existing grade at centerline is shown adjacent to the riprap channel side slope. The assembly is referenced on sheet C four point eleven.
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