Pond Boss Forums INTRO Questions & Observations Spillway vrs Drainpipe

With a grassy spillway or a dirt spillway, it will erode over time where an outlet pipe (providing it isn't made from corrugated galvanized steel) won't.

The emergency spillway needs to have a dense mat of roots from grass to prevent it from eroding in times of use.

Water is a universal solvent. It WILL chew away at a spillway if it is used constantly. If a pond builder recommends a dirt primary spillway, get it in writing that he will come back and repair it at no cost to you if it fails or erodes.