How Is Cemetery Drainage and Stormwater Properly Designed?

Cemetery drainage is designed so water never wins: grading gives every section positive surface drainage, subsurface systems relieve groundwater where soils or water table require it, and stormwater facilities handle the fully developed site's runoff. It all starts with soils and water-table investigation, because the ground's behavior sets the design. The work is invisible when it's right — sections that drain within hours of a storm, paths without puddles, turf that stays healthy. When it's wrong, families see it immediately. Drainage is one of the highest-leverage engineering investments a cemetery makes.

The soils investigation comes first: percolation rates, soil types, and seasonal high water table across the site. That data decides where burial sections can go as-is, where subsurface drainage is needed, and where grading alone won't be enough. The grading plan then shapes each section with positive drainage — typically 1 to 2 percent minimum on turf — directing water to swales, inlets, or daylight outfalls designed as part of the landscape. Subsurface drainage design sets pipe depth below the burial zone's influence, spacing based on soil permeability, and outfalls with positive fall to a legal discharge point. Stormwater management — detention ponds, underground systems, or infiltration where soils allow — is sized for the ultimate development condition per the jurisdiction's design storms. Erosion control during the cemetery's perpetual phased construction keeps sediment out of the drainage system and neighboring properties.

Investigate the ground before laying out sections — water table and soils are constraints, not surprises to discover later. And design the drainage for the final cemetery, because water doesn't care which phase you're in. If you're planning cemetery drainage, here's what I push for early.

• Investigate soils, percolation, and seasonal high water table across the whole site
• Grade every section for positive surface drainage — no flat or low burial areas
• Design subsurface drains from the soils data where water table or permeability demands it
• Size stormwater facilities for the fully developed site's runoff per local design storms
• Protect drainage infrastructure with erosion control through every construction phase