Downspout Drainage Beneath a Sidewalk in Wilmington DE

Author Name
By Mike Klein
Oct 25, 2026 10:08 AM
Solid drainage pipe connected to a gutter downspout in an open trench beside a Wilmington DE house

The downspout connection and solid drainage pipe exposed during installation at the Wilmington, DE home.

At a home in Wilmington, Delaware, our crew at One Thousand Hands Horticulture installed a drainage system to carry water from the gutters out to the street. The route crossed an existing concrete sidewalk, so part of the job involved digging beneath the walkway to install the pipe while leaving the concrete intact.

Connecting the downspouts to solid drainage pipe

We used four-inch SDR 35 solid pipe with NDS fittings to connect the gutter downspouts to the drainage route. In the installation photos, the green pipe follows a trench through the narrow space between the house and fence, with a branch connecting the downspout at the corner of the home.

One Thousand Hands Horticulture crew member hand digging a drainage trench between a house and fence

Hand digging the drainage trench in the narrow space between the house and fence.

Passing beneath the sidewalk

At the sidewalk crossing, we dug from the sides to create a passage for the four-inch pipe beneath the concrete. That let us continue the drainage route without cutting out or replacing the sidewalk. Once the pipe was in place, we put the excavated area back while preserving the existing walking surface.

Crew member digging beside a concrete sidewalk to prepare a drainage pipe crossing beneath it
Crew preparing a drainage trench beside an existing sidewalk with green solid pipe ready for installation

Our crew excavating beside the sidewalk and preparing the pipe route beneath the existing concrete.

Including access for future cleaning

The downspout connections include a cleanout system to provide access for future maintenance. Together, the connections and solid pipe create a route for roof runoff to travel from the gutters to the street.

This project is part of our drainage and landscaping work in Wilmington, DE. Our stormwater management and drainage services include downspout drainage and pipe installation around existing landscape features. If you need help managing water from your roof or gutters, contact us to discuss your drainage project.

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