We frequently receive customer questions about storm water systems in our communities. Here, we’ll give you a brief overview of storm drains, trap lows, and storm ponds, and explain how they help keep a community’s water system healthy.

Storm Drains

As part of the development of a new community, storm drains (catch basins) are mapped in to drain the water when it rains. Rainwater enters the metal grates you see along the edge of the road and runs into the underground pipes of the stormwater management system. Under the sidewalk, there is a barrel that collects the water. The barrel is attached to a pipe that allows the water to be whisked away into the river.

To avoid the pooling of water, it is important to keep these grates clear of debris. If you see a drain that is blocked, damaged, or full of debris, be sure to contact your Municipality.

Trap Lows

Trap Lows are ponding areas that are designed to manage large volumes of water during fast rainfall. They are constructed to temporarily hold back runoff so that areas downstream do not receive large quantities of water all at once. These systems are designed in compliance with the municipal approved Stormwater Management Plan to handle severe rainstorms and prevent flooding and subsequent property damage.

A Trap Low is a temporary stormwater storage site that assists the underground pipe system during a rainstorm. They are designed into the streets, lanes and even parks to accommodate high volumes of water by allowing water to pool and then slowly drain down for up to 24 hours. Do not panic if you see water rising in your street, or even in your driveway, during a fast rainfall. Predetermined grading plans are followed at the time of construction to ensure the water will flow towards the Trap Low and slowly drain into catch basins once the rain subsides. There is an easement registered on any lot that will have temporary ponding on it. This easement is registered to the Municipality and legally permits the ponding to occur on the lot until it safely drains away.

Storm Ponds

Storm ponds collect and hold rainfall before it reaches the rivers, creeks, and streams. Not only can storm ponds act as beautiful spaces within the community, but they also serve to protect homes from possible flooding after a storm, limit the risk of erosion, and reduce the number of sediments and pollutants entering waterways.

A “wet” storm pond holds water year-round, and their water levels may rise significantly during a storm event. It is dangerous to use storm ponds for swimming or skating, as they are not designed for recreational purposes.

In contrast, a “dry” storm pond does not contain water most of the time. It only fills with water during heavy rain to prevent the stormwater system from becoming overwhelmed, thus reducing the risk of flooding.

In addition to collecting rainwater, storm ponds provide a variety of benefits to the community, such as:

A natural backdrop. The plants you see around a stormwater pond aren’t weeds. They have been purposely planted there and are intentionally left to grow on their own, without being trimmed or manicured.

Improved water quality. Sediment particles settle at the bottom of the pond, and the water-tolerant plants naturally purify the water by removing pollutants.

Enhanced air quality. The presence of healthy and vibrant plants results in cleaner air.

Wildlife habitat. Birds, frogs, butterflies and other pollinators can all flourish in a stormwater pond’s ecosystem.

An inviting space. Depending on the size and location, the pond can be a place to visit with others, or simply take in the sounds of nature.

Increased property values. A home located near a storm pond has the unique bonus of lovely views in every season.

Your community’s stormwater sites may change their appearance over the course of the year. As you enjoy the scenery, take a moment to appreciate the ongoing protective and biological benefits that a community’s stormwater system provides.