Shown on Grading and Drainage Plans
Stormwater discharge locations are detailed in the site’s grading, drainage, or stormwater management plans prepared by civil engineers. These plans outline how surface runoff is collected and where it exits the property.

• Discharge points are typically located at the lowest elevation on-site
  
• Shown as outfalls leading to swales, storm drains, culverts, or detention ponds
  
• Includes flow direction arrows, pipe sizes, and connection details
  

Directed Toward Public or Natural Drainage Systems
Stormwater from the site is usually discharged into public infrastructure or natural features, depending on location and regulatory requirements. Proper discharge prevents flooding, erosion, and environmental harm.

• Into municipal storm sewer systems through inlets or curb cuts
  
• To nearby creeks, rivers, or drainage ditches via approved outfalls
  
• Into on-site detention/retention basins that release water gradually
  

Regulated by Local Stormwater and Environmental Codes
Discharge locations and methods must comply with local stormwater ordinances, environmental protection laws, and permitting requirements. Improper discharge can result in fines or project delays.

• Must meet water quality standards and flow rate controls
  
• Often requires a stormwater pollution prevention plan (SWPPP)
  
• Permits may mandate energy dissipation (e.g., riprap) to reduce erosion at discharge points