Waterloo drainage committee to verify slope after resident reports standing water on West Third Street

The Waterloo Drainage Committee spent much of its meeting addressing repeated standing water and clogged downspouts on West Third Street after a resident reported a newly installed section of pipe was retaining water rather than draining to the street.

Mr. Gibly, a Waterloo resident, told the committee he photographed a low, “belly” section in a recently replaced run of pipe that he said left the final piece at the sidewalk pitched upward. “Well, it’s going to hold water,” he said, describing how leaves and debris lodge in the opening and prevent flow.

Nate, a city staff member who visited the site with committee leadership, said the committee found multiple elbows in downspouts that can trap water and that most runs were dry except for the one at Mr. Gibly’s property. “You want to go the shortest route possible,” Nate said, cautioning that trees and existing yard features can complicate rerouting to an alley.

Committee staff cited the subdivision code, saying single-family roof and foundation drains should daylight with the opening at least 15 feet from the foundation and at least 5 feet before a roadway or sidewalk; as one compliance option staff suggested cutting the pipe about five feet back from the sidewalk and daylighting it so runoff disperses across the yard.

Residents and staff discussed several technical fixes and limits. The resident proposed a 90-degree turn to send the downspout to the alley to achieve slope, but staff and members raised concerns: a 90-degree turn can clog with leaves, trees and yard trenches can block routing, and a rerouted flow to the alley could create an ADA hazard where pedestrian access exists. Staff also discussed alternative measures including using 45-degree fittings, installing a shallow French drain pocket filled with clean rock, or installing pop-up devices commonly used on downspouts — each with trade-offs for clogging and appearance.

Before any repair, the committee agreed the priority is to verify the installed pipe’s pitch. Committee members proposed using a tile probe or running a camera to determine whether the final section of pipe was installed with the wrong slope when the sidewalk was replaced; if the pipe is pitched uphill the group said it will hold water regardless of weep holes or other small fixes.

The committee did not approve immediate construction work at the meeting. Staff committed to “explore our options,” verify the pipe alignment, and follow up with the resident and the committee with recommended next steps. A motion to adjourn passed by voice vote and the meeting ended at 7:03 p.m.