This Manual gives auxiliary structure strategies to deltas having explicit designs that enhance pressure driven stream in courses. Water powered plan techniques for getting these channel setups are given in Hydraulic Engineering Circular No. 13 (HEC No. 13), “Water driven Plan of Improved Inlets for Cuvlerts” (I), first distributed in 1972 by the Federal Highway Organization (FHWA). HEC No. 13 contains a progression of diagrams and tables for deciding the enhancement in pressure driven execution got with inclined headwalls, falls and side or then again incline decreased bays. Plan strategies and ordinary detai Is for the part structures found in enhanced deltas, for example, wing dividers, headwalls, overskirts and the delta itself, are likewise exhibited in this Manual. These strategies cover bays to strengthened solid pipe, fortified solid box segments also, creased metal pipe. They additionally apply to the structure of course barrels, themselves, for every one of the above sort courses.