Take a swim, feed those hungry steam turbines, dig a moat, or dig canals to connect bodies of water (useful for boat and ship mods).
This is a simple overhaul of CanalBuilder, originally created by MostlyNumbers and updated to 1.1.x by Walkman100.
It does not modify the behavior of any existing water tiles and instead uses the shallow water included in vanilla Factorio for maximum compatibility with other mods, especially those that change terrain generation.
Waterfill - replace dirt with shallow water
Swimming - Players, vehicles, and biters can cross shallow water
Waterfill can only be placed adjacent to existing bodies of water - no spawning water from nowhere
Waterfill only produces shallow water, which biters can cross
Water will slow down players and some vehicles
Minimum 3-tile width, since this can be used as a high-throughput water pipe for reactors
This mod goes well with Cargo Ships and is designed to work well with mods that change terrain generation, such as Space Exploration and Alien Biomes.
While this waterfill is totally safe for players, it does not yet check for structures. Place waterfill carefully, or it will eat your buildings