Water must move downhill so double check to see that water moves to your planned locations. If you do not do the installation yourself at least observe your construction so you can help troubleshoot any future problems. Make a photo record of the work if you have a camera handy. During construction you should take your plan drawing and sketch onto the plan what actually was installed. Important items such as locations, depths, sizes, and problems will help you improve or expand your system later.
Every drainage system needs some periodic inspection to see that the system performs properly.
Surface features like yard drains, roof drain catchbasins, manholes, swales, above ground pipes and couplings, pipe anchors, and discharge areas can be quickly checked. Catchbasins and manholes are usually designed to capture debris and heavier sediments and will require the removal of a few buckets of material from time to time to prevent pipe clogging and discharge of material into water bodies. Below ground drainage features like pipes, strip drains, couplings, and overall system performance should be checked regularly for signs of failure during rainfall events. Overflows, leaks, wet areas, flow bypassing your system, and discharge interferences can be noted and immediately repaired if you detect the problems early.