Rainwater and drainage
If the property borders a drainage channel, establish responsibilities before altering the flow or level of water.
Why it matters for your tarmac surfacing: Show the direction of falls, where water gathers and every visible channel, gully or discharge point. For tarmac surfacing, it can affect excavation, compaction, course depths, drainage, edge support and the handover programme.
Useful photograph: the area after rain, including low points and drainage features.