Projects Planning and Studies

American Fork Storm Drain Study

In order to help our client gain a better understanding of the stormwater flow paths in the American Fork East area, Franson Civil Engineers performed a storm drain analysis. We reviewed the rainfall intensities that were used in previous storm drain studies for American Fork City. In a few instances, we adjusted the sub-basins’ geographic boundaries. Where warranted, we made refinements in rainfall intensities that would subsequently be used to determine peak runoff. The study helped determine the peak flow at three crossings along State Street, which may need upgraded conveyance capacities to account for the increased runoff that will occur when UDOT widens State Street.

We modeled the storm runoff using HEC-HMS and sized storm drainage conveyance facilities according to the calculated storm runoff. The city used the report for developments and capital facilities.