Capitol Hill Community Drainage Improvements
Overview
This project seeks to alleviate rainfall-related flooding in Capitol Hill by improving storm system performance. The City will create a stormwater dry pond in Capitol Hill School’s green space, replace older storm sewer lines with higher volume ones, and add new storm sewer lines in several locations.
This project will bring environmental, social and public safety benefits to Capitol Hill, such as new sidewalks.
Impacts to parking, public pathways and residential access are expected. We are completing this work in coordination with Capitol Hill and St. Pius X elementary schools, with student safety at the forefront.
Project timeline
- January 2026: Design completed
- June 22, 2026: Construction begins
- Early September 2026: Dry pond complete
- November 2026: Construction complete
For details on when construction will be taking place on specific streets, please visit North Star Contracting’s project website at www.capitolhilldrypond.ca.
Construction details and impacts
Work hours will be 7:00 a.m. – 7:00 p.m. Monday to Saturday and 9:00 a.m. – 7:00 p.m. Sunday. All work areas will be signed and detours will be in place where necessary.
Capitol Hill Elementary dry pond: July through August 2026
We are working with Capitol Hill and St. Pius X elementaries to provide safe access during construction.
- Green space and adjacent sidewalk closures. Temporary fencing will be installed.
- Noise, dust and construction traffic are expected.
Stormwater pipe, service line and water main installation and replacements: Late June through October 2026. See map below for details.
Open cut construction is necessary for these pipe replacements. The road surface will be removed, and replaced once the project is complete. Excavations will be backfilled as soon as possible. Impacts include:
- Road closures
- Sidewalk closures
- Street parking will be temporarily unavailable in some areas
- Waste collection many be affected
- Temporary water shutoffs are possible. Residents will be notified by onsite crews when these are necessary.
- Noise, dust and construction traffic
- Tree removal where new sidewalks are being installed along 22 and 23 Avenue NW. These trees will be replaced following construction.
Project area map
Questions?
Please direct questions to 311 for the fastest response. Detailed questions can also be sent to the project team via email.
What is a dry pond?
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Before heavy rainfall
A dry pond can be located on parkland, next to roadways or on recreation or school fields. Once constructed the entire site is fully landscaped to blend into local surroundings, and can continue to be used for sport, recreation or leisure purposes.
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After heavy rainfall
A dry pond captures stormwater runoff during a rainstorm, as well as water from an underground stormwater pipe. Water collected in a dry pond can take from one to six hours to drain after a storm. This is done by gravity via drains built into the bottom of the pond.
This project is part of the City's Community Drainage Improvements Program, which works to reduce overland flooding in areas throughout Calgary