When designing drainage pipelines, the design must be extended to cross any road or proposed road widening that's adjacent to the development. This ensures any existing or proposed services within the road reserves are known and the proposed drainage works can cross these services.

Construction and maintenance requirements are particularly important considerations when designing channel or waterway works. Relevant considerations include:

- the maximum slope and height of the grassed batters
- whether trucks require access to the channel invert
- the location of inlets and roads
- whether there are limitations on the use of certain construction
ground conditions
- the distance from the proposed alignment to any existing services (particularly if there are any issues with side loading effects during excavation)