Additionally the county manages drainage easements across hundreds of properties.
Surface water catch basin.
Ridges and hills that separate two watersheds are called the drainage divide.
Unless constructed with permeable bottoms to let water infiltrate into underlying soil this subterranean basin can become a mosquito breeding area because it is cool dark and retains.
Larger watersheds contain many smaller watersheds.
A catch basin is a large drain usually placed in low areas of a yard to catch surface runoff water.
It usually consists of surface drain that leads to an enlarged box beneath that is then tied to an underground drainage system that finally leads to downspout drains or storm sewers.
Island county owns and maintains over 3700 culverts and over 1700 catch basins nearly all associated with county roads.
The watershed consists of surface water lakes streams reservoirs and wetlands and all the underlying groundwater.
Diversified drainage can create a drainage system that directs storm water and surface water runoff into catch basins also known as a storm drain or curb inlet and discharge it into the municipal storm water system or natural wetlands through.
It stands to reason that if you want to remove surface water you remove the water at the surface and not wait for it to saturate the ground.
County road crews keep outfalls flowing culverts draining catch basins catching and surface water managed.