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Thanks everyone for your help.

I found a pdf. of HEC-12 but not I need to figure out how to calc the contour spots.

If you want to find the flow capacity, FHWA's HEC-12 will give you all the info you need. Or are you trying to make contours and spots on plan view? Both. Is there any spot online where I could look at the HEC-12?

I'm having trouble figuring out how to produce these numbers and then apply them to the plan view. I made a profile view of the existing street section. It is a 1525' straight strech of roadway. The existing flow line is at a .25% grade. The new FL will be .9% for 200' then is will decrease...

without uniform elevation

It is for a detention basin and the area proposed is an odd shaped polygon.

I'm trying to find an equation list or some sample problems for cut and fill questions. I haven't done these in a while and kinda of forgot how. Thanks

thanks for you help

I am trying to build a ramp to a an elevation of 13' and want to use 2 vertical curves with a 20 % grade that are 20 ft long. How could I find the elevation at each point?