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Garrison Dam Spillway Modification Project

Sector: Water Supply and Storage • Location: Riverdale, North Dakota, United States

Source: International Water Power and Dam Construction

Project
Planned

The Garrison Dam Spillway Modification Project aims to modernize the dam and reduce risks associated with the spillway's performance during significant storms or snowmelt. This multi-year project is considered the largest dam safety modification project in US Army Corps of Engineers history, focusing on critical spillway components to ensure effective flood risk management.

Status
Prospective
Sector
Water Supply and Storage, Hydro, Power Generation (CCGT), Government
Location
Riverdale, North Dakota, United States of America
Updated
22 Jul 2026
Source
International Water Power and Dam Construction

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The project “Garrison Dam Spillway Modification Project” is an infrastructure initiative in the Water Supply and Storage sector, located in Riverdale, North Dakota, United States. Taiyo aggregates data on it from International Water Power and Dam Construction.

Participants

Sponsoring Agency

Status

Original status

Planned

Taiyo status

Prospective

Taiyo last update

2026-07-22

Contact

Not available for this record.

Description

Description

The Garrison Dam Spillway Modification Project aims to modernize the dam and reduce risks associated with the spillway's performance during significant storms or snowmelt. This multi-year project is considered the largest dam safety modification project in US Army Corps of Engineers history, focusing on critical spillway components to ensure effective flood risk management.

Original sector

Dams

Location

Country

United States of America (USA)

State

North Dakota

City

Riverdale

Source

Source

International Water Power and Dam Construction

URL

More Details

Record type

Project

Sector

Water Supply and Storage, Hydro, Power Generation (CCGT), Government

Article published date

2025-03-20

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