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Fact Sheet 34: Minnesota and North Dakota Flood Control Projects

U.S. Army Corps of Engineers, St. Paul District
Published March 12, 2025
Updated: March 12, 2025
VALLEY CITY, N.D. -- Water flows through the U.S. Army Corps of Engineers, St. Paul District's Baldhill Dam, near Valley City, N.D., July 31.

VALLEY CITY, N.D. -- Water flows through the U.S. Army Corps of Engineers, St. Paul District's Baldhill Dam, near Valley City, N.D., July 31.

High and dry! You don’t see this that very often. Outflows from Baldhill Dam, near Valley City, N.D., were cut from 850 cubic feet per second to 13 cfs so that inspectors could complete a periodic inspection of the structure this week. The Corps’ comprehensive periodic inspections are performed every five years as part of its dam safety program. Routine or annual inspections are conducted at the site each year but do not involve dewatering the stilling basin. http://bit.ly/18MlfbO

High and dry! You don’t see this that very often. Outflows from Baldhill Dam, near Valley City, N.D., were cut from 850 cubic feet per second to 13 cfs so that inspectors could complete a periodic inspection of the structure this week. The Corps’ comprehensive periodic inspections are performed every five years as part of its dam safety program. Routine or annual inspections are conducted at the site each year but do not involve dewatering the stilling basin. http://bit.ly/18MlfbO

The Minnesota and North Dakota Flood Control Section staff is responsible for managing separately budgeted, multi-purpose water resource projects on four major river basins in eastern and north central North Dakota and western Minnesota. Resources managed include 16 dams and associated water management structures with an annual budget of approximately $4 million and 20 full-time and seasonal employees. The breakout between the sections is described below. 

It is the mission of the western office to manage flood control, water supply and shoreline management benefits for communities near and downstream of the projects, as well as provide land and wildlife management activities and recreational opportunities, such as overnight camping, day-use facilities, boat launching facilities and visitor assistance. The personnel provide visitor assistance and enforcement, facility maintenance and dam operations, budgetary, administrative, supervisory, contracting and technical support to all field sites in the area, as well as serve as liaisons between the field sites and the St. Paul District. 

NORTH DAKOTA FLOOD CONTROL SECTION

Baldhill Dam/Lake Ashtabula

Lake Ashtabula is located on the Sheyenne River, 10 miles north of Valley City, North Dakota. The Corps operates and maintains seven recreation areas around Lake Ashtabula, including four campgrounds and 35 miles of the North Country National Scenic Trail which has been certified by the National Park Service. The project has 8,116 acres of fee-land, of which 1,600 acres are managed for wildlife. The staff provide onsite management, as well as interpretive programs on the outdoors, environment and water and boat safety.

The conservation pool elevation at Baldhill Dam is 1,266 feet.  Each year, from October through February, the pool is drawn down to elevation 1,262.5 feet. Depending on the amount of snow water content in the basin, the pool can be further drawn down to a maximum elevation of 1,255 feet by the end of March. The Corps balances storage capacities and flows during floods with the goal to maximize storage while minimizing outflows to reduce flooding downstream. The pool may rise to elevation 1,271 feet, allowing for an additional 30,700 acre-feet of storage above the conservation elevation. The Sheyenne River channel capacity below Baldhill Dam is considered to be 2,400 cubic feet per second, or cfs.

Homme Dam

Homme Dam is located on the south branch of the Park River near Park River, North Dakota. The project is operated and maintained by the staff at Lake Ashtabula. The Walsh County Park Board operates a leased
30-acre park on the south side of the dam.

The conservation pool elevation at Homme Dam is 1,079.8 feet. The maximum drawdown elevation is
1,064 feet. The pool is drawn down before the spring runoff begins because there is no flood control storage above conservation at this project. The flood control storage results from the drawdown. With the exception of the spring runoff and rain events, it is common for this reservoir to have no inflow.    

Souris River Project

The Souris River Project is located on the Souris River in north central North Dakota. The project consists of Lake Darling Dam, two additional water control structures and four pumping stations at the Upper Souris National Wildlife Refuge and five water control structures/embankments at the J. Clark Salyer National Wildlife Refuge. An agreement between the U.S. Fish and Wildlife Service, or USFWS, and the Corps of Engineers identifies the Corps is responsible to maintain the flood control and mitigation structures. Management for this project is provided by the Lake Ashtabula staff.

The Corps takes over management of Lake Darling Dam when spring runoff is expected to be at least a 1 in 10 event. The conservation pool elevation is 1,597 feet.  During the fall of each year, the USFWS lowers the Lake Darling pool elevation by 1 foot prior to Feb. 1. Additional drawdowns may be done in late winter/early spring, depending on the amount of snow water content within the basin. The Corps works with the Saskatchewan Water Authority and the USFWS during a flood to reduce downstream flooding in compliance with the 1989 International Agreement. The pool may rise to elevation 1,601 feet during flood conditions, which allows for an additional 39,700 acre-feet of storage. 

MINNESOTA FLOOD CONTROL SECTION

Orwell Dam

Orwell Dam is located on the Ottertail River near Fergus Falls, Minnesota. The Corps operates two day-use recreation areas near the dam. The Minnesota Department of Natural Resources leases nearly 2,000 acres of this site for wildlife management. Of this area, approximately one-third is a closed sanctuary.

The conservation pool elevation at Orwell Dam is 1,064 feet. Depending on the amount of snow water content in the basin, the pool may be drawn down to a maximum elevation of 1,050 feet in March. The pool may rise to elevation 1,070 feet, allowing for an additional 5,700 acre-feet of storage above the conservation level. The Corps has the authority, in extreme conditions, to increase the flood storage capacity within the reservoir to elevation 1,073 feet. The supplementary surcharge pool provides an additional 3,700 acre-feet of storage above the flood control pool. The Otter Tail River channel capacity below Orwell Dam is considered to be 1,200 cfs.   

Lake Traverse Project

The Lake Traverse Project is located on the Minnesota/South Dakota border near Wheaton, Minnesota. The project consists of three structures: Browns Valley Dike and Reservation and White Rock dams. The project consists of three day-use recreation areas and 640 acres of fee land for wildlife. The Minnesota Department of Natural Resources leases 872 acres for wildlife management purposes. Additionally, the district sign shop is located here. 

The Browns Valley Dike sits on the continental divide between the Red River of the North basin and the Mississippi River basin via the Minnesota River. Water flows into Lake Traverse, through Reservation Dam, into Mud Lake, through White Rock Dam and down the Bois de Sioux River before joining up with the Otter Tail River in Wahpeton, North Dakota, and forming the Red River of the North. 

The conservation elevation at Reservation Dam is 976.8 feet and the conservation elevation at White Rock Dam is 972 feet. There is no drawdown on Mud Lake. The Corps performs a drawdown at Reservation Dam in March, and it can be between elevation 975.5 and 974 feet dependent on the amount of snow water content. During a flood, the gates at White Rock Dam are closed when a trigger has been met (a stage of 12 feet at Wahpeton when the snow water content is above 3 inches or a stage of 10 feet at Wahpeton when the snow water content is below 3 inches and during summer events). The gates are reopened once the flood stage has either fallen back below the trigger or there is no more storage in the pools. During a flood event, the pools may rise to elevation 981 feet allowing for an additional 128,500 acre-feet of storage above conservation. The Bois de Sioux River channel capacity below White Rock Dam is considered to be 1,100 cfs.

Bigstone/Whetstone

Bigstone/Whetstone is located on the Minnesota River near Odessa, Minnesota. In accordance with an agreement with the Corps, the lands and waters are managed by the USFWS as a national wildlife refuge. The Highway 75 dam and related structures are operated and maintained by Corps staff from the La qui Parle Project. After the spring runoff, the USFWS determines what elevation they want the pool held at through December; therefore, conservation pool elevation can vary from 947.3 to 952.3 feet. The Lac qui Parle Project is located downstream of the Highway 75 dam on the Minnesota River.

Lac qui Parle Project

The Lac qui Parle Project is located on the Minnesota River near Watson, Minnesota. The project consists of the Lac qui Parle, Marsh Lake and Chippewa River diversion dams and Watson Sag Weir. The Corps operates and maintains two day-use recreation areas here, one below Lac qui Parle Dam and the other below the Marsh Lake Dam. For wildlife management purposes, 347 acres are leased to the Minnesota Department of Natural Resources.

Water continues to flow southeast down the Minnesota River after leaving Highway 75 Dam. It passes first through Marsh Lake and over Marsh Lake Dam, which has a fixed crest spillway, then into Lac qui Parle Lake and out Lac qui Parle Dam. Following the spring runoff, Lac qui Parle is held at elevation 933.5 feet until May for fish spawning. Following the spawn, the lake is held at a conservation elevation of 933 feet through the end of August. The pool is held at a winter conservation elevation of 934 feet from the beginning of October until the end of February to provide suitable fish habitat. The pool may rise to elevation 941.1 feet during a flood event, which allows for an additional 117,700 acre-feet of storage above the conservation level. The Minnesota River channel capacity below Lac qui Parle Dam is considered to be 2,500 cfs.

The Chippewa River is a large tributary to the Minnesota River. During non-flood events, the water coming from the Chippewa River is split 50/50, with half flowing through the Chippewa Diversion Dam and continuing down the Chippewa River and the other half flowing over the Watson Sag weir into Lac qui Parle Lake. During flood events, the flow through the Chippewa Diversion Dam is limited to no more than 1,000 cfs until the gate is closed and all water is flowing over the structure. The Chippewa River channel capacity below the Chippewa Diversion Dam is 1,000 cfs.


St. Paul District Fact Sheets

Fact Sheet 01: St. Paul District Highlights

Colonel Eric R. Swenson assumed command of the St. Paul District July 28, 2022, becoming the district’s 67th commander and district engineer.
Published: 3/11/2025

Fact Sheet 02: St. Paul District

The St. Paul District is where the “Mighty Mississippi River” starts its long journey through the middle of the United States of America. The district borders follow the edges of four river basins – the Mississippi River, the Red River of the North, the Souris River and the Rainy River – and covers an area of approximately 139,000 square miles. This area includes most of Minnesota, the western half of Wisconsin, the northeastern half of North Dakota and small portions of northeastern South Dakota and northeastern Iowa. The district also shares approximately 500 miles of border with three Canadian provinces.
Published: 3/11/2025

Fact Sheet 03: St. Paul District Missions

Emergency Operations & Disaster Response The U.S. Army Corps of Engineers executes and delivers vital public emergency services to strengthen our nation’s ability to prepare, respond and recover from natural disasters or other emergencies within the United States and its territories. The Corps may provide technical assistance and, in instances where the nature of the disaster exceeds the capabilities of state, local or Tribal interests, the Corps may provide direct assistance to save human life, prevent immediate human suffering or mitigate property damage.
Published: 3/24/2025

Fact Sheet 04: St. Paul District History

The St. Paul District traces its origins to 1866, when Congress authorized the U.S. Army Corps of Engineers to establish a 4-foot navigation channel on the notoriously unreliable Upper Mississippi River. Maj. Gouverneur Kemble Warren, a West Point graduate widely acclaimed for his leadership at the Battle of Gettysburg, was tasked with initiating the new program and conducting preliminary surveys of the main river and its tributaries. Warren arrived in St. Paul, Minnesota, and opened the first district office in August 1866.
Published: 3/24/2025

Fact Sheet 05: Disaster and Emergency Response

The U.S. Army Corps of Engineers executes and delivers vital public emergency services to strengthen our nation’s ability to prepare, respond and recover from natural disasters or other emergencies within the United States and its territories. Emergency preparedness and response is primarily a local responsibility; however, the Corps of Engineers may provide technical assistance and in instances when the nature of the disaster exceeds the capabilities of a state or Tribal interest, the Corps may provide direct assistance to save human life, prevent immediate human suffering or mitigate property damage.
Published: 3/24/2025

Fact Sheet 06: Flood Risk Management

Every year, floods sweep through communities across the United States, taking lives, destroying property, shutting down businesses and causing millions of dollars in damage. The Corps assists communities in building projects that reduce risk from floods while managing a number of reservoirs designed to reduce excess flooding. Additionally, the Corps assists states in reacting to floods when the response required exceeds a state’s capabilities. The St. Paul District has built flood risk management projects in a number of Upper Midwest communities to include Grand Forks, North Dakota; Mankato, Minnesota; Rochester, Minnesota; and St. Paul, Minnesota. 
Published: 3/24/2025

Fact Sheet 07: Emergency Bank Protection

Section 14 of the 1946 Flood Control Act, as amended, permits construction of bank protection works to protect endangered highways, highway bridge approaches and other essential, important public works such as municipal water supply systems and sewage disposal plants; churches, hospitals, schools and other nonprofit public services; and known cultural sites that are endangered by flood-caused bank or shoreline erosion. Repair, restoration and/or modification of the eroding streambank is allowed. Procedures followed for Section 14 projects are designed to expedite implementation.
Published: 3/24/2025

Fact Sheet 08: Flood Plain Management

The U.S. Army Corps of Engineers Flood Plain Management Services Program is authorized by Section 206 of the Flood Control Act of the 1960, as amended. Under this program, the Corps is authorized, upon request by other federal, non-federal, local entities or tribes, to provide a full range of technical services and planning guidance on floods and floodplain issues.
Published: 3/24/2025

Fact Sheet 09: Small Flood Control Projects

The U.S. Army Corps of Engineers has the authority, provided by Section 205 of the 1948 Flood Control Act, as amended, to plan, design and construct certain small flood control projects that have not already been specifically authorized by Congress. Both structural (levees, channels, or dams, for instance) and nonstructural (flood proofing or evacuation, for example) solutions are considered.
Published: 3/24/2025

Fact Sheet 10: Planning Assistance to States and Tribes

The Planning Assistance to States and Tribes Program is authorized by Section 22 of the 1974 Water Resources Development Act, as amended in 1990 and 2007. The U.S. Army Corps of Engineers is authorized to use its technical expertise in water and related land resource management to help states, federally recognized tribes. local government, and other non-federal entities with their water resource problems. Upon written request, the Corps will cooperate with these entities to prepare plans for the development, use, and conservation of water and related land resources within their bounds.
Published: 3/24/2025

Fact Sheet 11: Tribal Partnership Program

The Tribal Partnership Program (TPP) provides authority for the U.S. Army Corps of Engineers to utilize TPP to perform water-related planning activities and activities related to the study, design and construction of water resources development projects located primarily on tribal lands that substantially benefit federally recognized tribes.
Published: 4/3/2025

Fact Sheet 12: Silver Jackets

Silver Jackets teams are collaborative state-led interagency teams, continuously working together to reduce flood risk at the state level. Through the Silver Jackets program, the U.S. Army Corps of Engineers; the Federal Emergency Management Agency; and additional federal, state and sometimes local and Tribal agencies provide a unified approach to addressing a state’s priorities.
Published: 3/24/2025

Fact Sheet 13: Navigation

Navigation is travel or transportation over water. Many products we use today are transported by vessels on inland waterways. Towboats push barges loaded with products such as grain, coal and petroleum up and down rivers to loading and unloading facilities. The use of barges as opposed to semis produces around 90% less greenhouse gas emissions.
Published: 3/24/2025

Fact Sheet 14: Comparing Navigation

Water Transportation Roughly 25% of all waterborne commerce in the U.S. and 92% of the nation’s agricultural exports take place on the Mississippi River, the fourth largest river in the world.
Published: 3/24/2025

Fact Sheet 15: Environmental Programs

One of the U.S. Army Corps of Engineers’ critical missions is to strive for environmental sustainability. The St. Paul District recognizes the interdependence of life and the importance of the physical environment and proactively considers environmental consequences of its programs. Our goal is to seek balance and synergy among human development and natural systems by designing economic and environmental-friendly solutions that reinforce one another. Our environmental programs focus on the key areas of ecosystem preservation, restoration and protection.
Published: 4/3/2025

Fact Sheet 16: Regulatory Program

The mission of the U.S. Army Corps of Engineer’s regulatory program is to protect the nation’s aquatic resources, while allowing reasonable development through fair, flexible and balanced permit decisions. The Corps evaluates permit applications for construction activities occurring in the nation’s waters and wetlands. Corps permits are also necessary for any work in the nation’s navigable waters.
Published: 3/24/2025

Fact Sheet 17: Mississippi River Commission

Following several decades of constitutional squabbles, engineering disputes and regional bickering dating back to the early 1800s, Congress recognized the need to harmonize river improvements through a central organization. On June 28, 1879, the federal legislature, assisted by the efforts of a congressional coalition of navigation and flood-control interests, established the Mississippi River Commission as an executive body.
Published: 3/24/2025

Fact Sheet 18: Aquatic Ecosystem Restoration (Sec. 206)

Section 206 of the Water Resources Development Act of 1996 provides authority for the U.S. Army Corps of Engineers to undertake restoration projects in aquatic ecosystems such as rivers, lakes and wetlands. The Corps evaluates projects that benefit the environment through restoring, improving or protecting aquatic habitat for plants, fish and wildlife.
Published: 3/24/2025

Fact Sheet 19: Upper Mississippi River Restoration Program

River Restoration Program The Upper Mississippi River System consists of 1,300 miles of the Upper Mississippi and Illinois rivers and several major tributaries. Prior to 1866, the Upper Mississippi River was largely natural, twisting and turning across the wide river valley with numerous islands, side channels and backwaters. In 1866, the 4-foot channel project was the first of several projects to improve conditions for navigation. The locks and dams were built in the 1930s to maintain a 9-foot shipping channel. For many years, the navigation pools created by the locks and dams supported a wealth of fish, wildlife and aquatic habitat. However, the value of this habitat gradually declined due to erosion and sedimentation. Aquatic plant beds diminished in size, and habitat diversity declined.
Published: 3/24/2025

Fact Sheet 20: Habitat Restoration (Sec. 1135)

Habitat Restoration The U.S. Army Corps of Engineers has the authority, provided by Section 1135 of the Water Resources Development Act of 1986, as amended, to plan, design and construct fish and wildlife habitat restoration measures. To be eligible for consideration, restoration measures must involve modification of the structures or operations of a project constructed by the Corps of Engineers or modification of an off-project site when it is found that the Corps project has contributed to the degradation of the environment.
Published: 3/24/2025

Fact Sheet 21: Environmental Section

It is the policy of the U.S. Army Corps of Engineers, St. Paul District, to apply principles of good environmental stewardship to the natural and cultural resources located on Corps administered federal lands.
Published: 3/24/2025

Fact Sheet 22: Recreation

It is a U.S. Army Corps of Engineers’ mission to provide quality, public outdoor recreation experiences to serve the needs of present and future generations while being consistent with ecosystem management principles. As stewards of public lands, the St. Paul District has a special responsibility to assure resource accessibility for today and tomorrow while providing high quality outdoor recreational opportunities for all. The St. Paul District operates 49 recreation areas, ranging from public landings along the Mississippi River to lock and dam visitor centers to full-service campgrounds. These recreation areas are an important component of the region’s tourism industry, and the impact on the local and regional economies is significant. These sites see an average of 2.4 million visitors annual $97 million for the local and regional economy.
Published: 3/11/2025

Fact Sheet 23: Recreation Sites

The U.S. Army Corps of Engineers is the largest federal provider of water-based outdoor recreation in the nation. Our recreation sites provide a diverse range of outdoor activities that promote a healthy lifestyle to millions of people every year. We are committed to providing a safe, fun and secure experience for all of our visitors.
Published: 3/12/2025

Fact Sheet 24: Firewood Policy

It is the policy of the U.S. Army Corps of Engineers, St. Paul District, to support and contribute toward the efforts of state and other federal agencies to impede the movement of invasive species by the transport of firewood.
Published: 3/11/2025

Fact Sheet 25: Water Management

Maintaining the region’s water resources for maximum economic and environmental benefit is a full-time endeavor for the St. Paul District. Congress mandates the U.S. Army Corps of Engineers maintain a 9-foot navigation channel on the Mississippi River and manage water levels at each of its projects on a daily basis.
Published: 3/11/2025

Fact Sheet 26: Regulating Mississippi River Navigation Pools

Historical Background Improving navigation on the Mississippi River began as early as 1824. In 1878, the U.S. Congress authorized the first comprehensive project on the upper river: a 4 1/2-foot channel. This was followed by authorizations for a 6-foot channel in 1907 and the current 9-foot channel in 1928. To achieve the 9-foot channel in the Upper Mississippi River, the construction of a system of navigation locks and dams was authorized in 1930 and expanded in 1932, 1935, 1937, 1945 and 1958.
Published: 3/11/2025

Fact Sheet 27: Flood Terms

Cubic Feet per Second This is a common unit of flow measurement based on the number of cubic feet (1 ft tall X 1 ft wide X 1 ft deep) of water passing by a point in a second. It is abbreviated cfs. A flow rate of one cfs is equivalent to 449 gallons per minute.
Published: 3/11/2025

Fact Sheet 28: Levee Safety Program

Levees are man-made barriers along a water course constructed for the primary purpose of excluding flood waters from a portion of the floodplain (referred to as a “leveed area”) from a range of flood events. They provide tremendous benefits to communities, but with those benefits come risks. The U.S. Army Corps of Engineers Levee Safety Program works to better understand, manage and reduce the flood risks associated with levees.
Published: 3/11/2025

Fact Sheet 29: Dam Safety

The U.S. Army Corps of Engineers operates and maintains approximately 740 dams and associated structures nationwide that provide significant, multiple benefits to the nation — its people, businesses, critical infrastructure and the environment. These benefits include flood risk management, navigation, water supply, hydropower, environmental stewardship, fish and wildlife conservation and recreation. The Corps of Engineers Dam Safety Program seeks to ensure these dams do not present unacceptable risks to people, property or the environment.
Published: 4/4/2025

Fact Sheet 30: Small Business Utilization

It is the policy of the United States government to provide maximum practicable contracting opportunities to small business. To that end, the St. Paul District’s small business program manager provides advice and guidance to the Corps’ acquisition community and the small business community for all acquisitions valued at more than $10,000.
Published: 3/11/2025

Fact Sheet 31: Fountain City Service Base

The Fountain City Service Base, located in Fountain City, Wisconsin, plays an essential role in supporting St. Paul District’s effort to maintain navigation on the Upper Mississippi River north of Guttenberg, Iowa. The Corps has used this facility for the construction, repair and maintenance of vessels and equipment used for river improvement projects for more than a century.
Published: 3/24/2025

Fact Sheet 32: Dredge Fleet

The St. Paul District’s dredge fleet is made up of three vessels to include the Dredge William L. Goetz, the Motor Vessel General Warren and the Quarters Boat Harold E. Taggatz. This fleet is used to assist in maintaining 850 miles of the Upper Mississippi River, 335 miles of the Illinois River and other inland rivers and typically is used to dredge 1 to 2 million cubic yards of sediment out of the 9-foot navigation channel each year. The fleet is based out of the district’s service base in Fountain City, Wisconsin.
Published: 3/24/2025

Fact Sheet 33: Harbor Dredging

Sedimentation in the harbors is caused by the normal cycle of silt movement, erosion from high water or heavy rains and changes in river currents. The U.S. Army Corps of Engineers is authorized by various pieces of legislation to dredge a number of harbors within its boundaries. Funding is occasionally provided to the Corps’ Civil Works Operations and Management Appropriation to do this.
Published: 3/24/2025

Fact Sheet 35: Mississippi River Recreation and Eau Galle Lake Section

The U.S. Army Corps of Engineers provides quality, public outdoor recreation experiences to serve the needs of present and future generations while being consistent with ecosystem management principles. In the St. Paul District, the Mississippi River Recreation office is responsible for the management of public resources located on Corps-fee lands along approximately 243 river miles within the Upper Mississippi River 9-Foot Navigation Channel Project from Minneapolis to Guttenberg, Iowa. The Eau Galle Lake Dam and Recreation Area is also part of the Mississippi River Recreation Section and serves as a flood control project with recreational opportunities and environmental stewardship in Spring Valley, Wisconsin.
Published: 3/24/2025

Fact Sheet 36: Mississippi River Headwaters Project Office

The Headwaters Lakes Project, located in north central Minnesota, consists of six dams which control a watershed area covering 4,535 square miles. Originally authorized for the purpose of navigation, the Headwaters Project is now considered a multi-purpose project that includes flood risk reduction, recreation, water supply, fish and wildlife management, tribal trust, wild rice production and environmental stewardship. In addition to the Headwaters Lakes Project, the staff also manages Red Lake Dam, which controls the water level on Red Lake and has a watershed that encompasses approximately 6,000 square miles.
Published: 3/12/2025

Fact Sheet 34: Minnesota and North Dakota Flood Control Projects

U.S. Army Corps of Engineers, St. Paul District
Published March 12, 2025
Updated: March 12, 2025
VALLEY CITY, N.D. -- Water flows through the U.S. Army Corps of Engineers, St. Paul District's Baldhill Dam, near Valley City, N.D., July 31.

VALLEY CITY, N.D. -- Water flows through the U.S. Army Corps of Engineers, St. Paul District's Baldhill Dam, near Valley City, N.D., July 31.

High and dry! You don’t see this that very often. Outflows from Baldhill Dam, near Valley City, N.D., were cut from 850 cubic feet per second to 13 cfs so that inspectors could complete a periodic inspection of the structure this week. The Corps’ comprehensive periodic inspections are performed every five years as part of its dam safety program. Routine or annual inspections are conducted at the site each year but do not involve dewatering the stilling basin. http://bit.ly/18MlfbO

High and dry! You don’t see this that very often. Outflows from Baldhill Dam, near Valley City, N.D., were cut from 850 cubic feet per second to 13 cfs so that inspectors could complete a periodic inspection of the structure this week. The Corps’ comprehensive periodic inspections are performed every five years as part of its dam safety program. Routine or annual inspections are conducted at the site each year but do not involve dewatering the stilling basin. http://bit.ly/18MlfbO

The Minnesota and North Dakota Flood Control Section staff is responsible for managing separately budgeted, multi-purpose water resource projects on four major river basins in eastern and north central North Dakota and western Minnesota. Resources managed include 16 dams and associated water management structures with an annual budget of approximately $4 million and 20 full-time and seasonal employees. The breakout between the sections is described below. 

It is the mission of the western office to manage flood control, water supply and shoreline management benefits for communities near and downstream of the projects, as well as provide land and wildlife management activities and recreational opportunities, such as overnight camping, day-use facilities, boat launching facilities and visitor assistance. The personnel provide visitor assistance and enforcement, facility maintenance and dam operations, budgetary, administrative, supervisory, contracting and technical support to all field sites in the area, as well as serve as liaisons between the field sites and the St. Paul District. 

NORTH DAKOTA FLOOD CONTROL SECTION

Baldhill Dam/Lake Ashtabula

Lake Ashtabula is located on the Sheyenne River, 10 miles north of Valley City, North Dakota. The Corps operates and maintains seven recreation areas around Lake Ashtabula, including four campgrounds and 35 miles of the North Country National Scenic Trail which has been certified by the National Park Service. The project has 8,116 acres of fee-land, of which 1,600 acres are managed for wildlife. The staff provide onsite management, as well as interpretive programs on the outdoors, environment and water and boat safety.

The conservation pool elevation at Baldhill Dam is 1,266 feet.  Each year, from October through February, the pool is drawn down to elevation 1,262.5 feet. Depending on the amount of snow water content in the basin, the pool can be further drawn down to a maximum elevation of 1,255 feet by the end of March. The Corps balances storage capacities and flows during floods with the goal to maximize storage while minimizing outflows to reduce flooding downstream. The pool may rise to elevation 1,271 feet, allowing for an additional 30,700 acre-feet of storage above the conservation elevation. The Sheyenne River channel capacity below Baldhill Dam is considered to be 2,400 cubic feet per second, or cfs.

Homme Dam

Homme Dam is located on the south branch of the Park River near Park River, North Dakota. The project is operated and maintained by the staff at Lake Ashtabula. The Walsh County Park Board operates a leased
30-acre park on the south side of the dam.

The conservation pool elevation at Homme Dam is 1,079.8 feet. The maximum drawdown elevation is
1,064 feet. The pool is drawn down before the spring runoff begins because there is no flood control storage above conservation at this project. The flood control storage results from the drawdown. With the exception of the spring runoff and rain events, it is common for this reservoir to have no inflow.    

Souris River Project

The Souris River Project is located on the Souris River in north central North Dakota. The project consists of Lake Darling Dam, two additional water control structures and four pumping stations at the Upper Souris National Wildlife Refuge and five water control structures/embankments at the J. Clark Salyer National Wildlife Refuge. An agreement between the U.S. Fish and Wildlife Service, or USFWS, and the Corps of Engineers identifies the Corps is responsible to maintain the flood control and mitigation structures. Management for this project is provided by the Lake Ashtabula staff.

The Corps takes over management of Lake Darling Dam when spring runoff is expected to be at least a 1 in 10 event. The conservation pool elevation is 1,597 feet.  During the fall of each year, the USFWS lowers the Lake Darling pool elevation by 1 foot prior to Feb. 1. Additional drawdowns may be done in late winter/early spring, depending on the amount of snow water content within the basin. The Corps works with the Saskatchewan Water Authority and the USFWS during a flood to reduce downstream flooding in compliance with the 1989 International Agreement. The pool may rise to elevation 1,601 feet during flood conditions, which allows for an additional 39,700 acre-feet of storage. 

MINNESOTA FLOOD CONTROL SECTION

Orwell Dam

Orwell Dam is located on the Ottertail River near Fergus Falls, Minnesota. The Corps operates two day-use recreation areas near the dam. The Minnesota Department of Natural Resources leases nearly 2,000 acres of this site for wildlife management. Of this area, approximately one-third is a closed sanctuary.

The conservation pool elevation at Orwell Dam is 1,064 feet. Depending on the amount of snow water content in the basin, the pool may be drawn down to a maximum elevation of 1,050 feet in March. The pool may rise to elevation 1,070 feet, allowing for an additional 5,700 acre-feet of storage above the conservation level. The Corps has the authority, in extreme conditions, to increase the flood storage capacity within the reservoir to elevation 1,073 feet. The supplementary surcharge pool provides an additional 3,700 acre-feet of storage above the flood control pool. The Otter Tail River channel capacity below Orwell Dam is considered to be 1,200 cfs.   

Lake Traverse Project

The Lake Traverse Project is located on the Minnesota/South Dakota border near Wheaton, Minnesota. The project consists of three structures: Browns Valley Dike and Reservation and White Rock dams. The project consists of three day-use recreation areas and 640 acres of fee land for wildlife. The Minnesota Department of Natural Resources leases 872 acres for wildlife management purposes. Additionally, the district sign shop is located here. 

The Browns Valley Dike sits on the continental divide between the Red River of the North basin and the Mississippi River basin via the Minnesota River. Water flows into Lake Traverse, through Reservation Dam, into Mud Lake, through White Rock Dam and down the Bois de Sioux River before joining up with the Otter Tail River in Wahpeton, North Dakota, and forming the Red River of the North. 

The conservation elevation at Reservation Dam is 976.8 feet and the conservation elevation at White Rock Dam is 972 feet. There is no drawdown on Mud Lake. The Corps performs a drawdown at Reservation Dam in March, and it can be between elevation 975.5 and 974 feet dependent on the amount of snow water content. During a flood, the gates at White Rock Dam are closed when a trigger has been met (a stage of 12 feet at Wahpeton when the snow water content is above 3 inches or a stage of 10 feet at Wahpeton when the snow water content is below 3 inches and during summer events). The gates are reopened once the flood stage has either fallen back below the trigger or there is no more storage in the pools. During a flood event, the pools may rise to elevation 981 feet allowing for an additional 128,500 acre-feet of storage above conservation. The Bois de Sioux River channel capacity below White Rock Dam is considered to be 1,100 cfs.

Bigstone/Whetstone

Bigstone/Whetstone is located on the Minnesota River near Odessa, Minnesota. In accordance with an agreement with the Corps, the lands and waters are managed by the USFWS as a national wildlife refuge. The Highway 75 dam and related structures are operated and maintained by Corps staff from the La qui Parle Project. After the spring runoff, the USFWS determines what elevation they want the pool held at through December; therefore, conservation pool elevation can vary from 947.3 to 952.3 feet. The Lac qui Parle Project is located downstream of the Highway 75 dam on the Minnesota River.

Lac qui Parle Project

The Lac qui Parle Project is located on the Minnesota River near Watson, Minnesota. The project consists of the Lac qui Parle, Marsh Lake and Chippewa River diversion dams and Watson Sag Weir. The Corps operates and maintains two day-use recreation areas here, one below Lac qui Parle Dam and the other below the Marsh Lake Dam. For wildlife management purposes, 347 acres are leased to the Minnesota Department of Natural Resources.

Water continues to flow southeast down the Minnesota River after leaving Highway 75 Dam. It passes first through Marsh Lake and over Marsh Lake Dam, which has a fixed crest spillway, then into Lac qui Parle Lake and out Lac qui Parle Dam. Following the spring runoff, Lac qui Parle is held at elevation 933.5 feet until May for fish spawning. Following the spawn, the lake is held at a conservation elevation of 933 feet through the end of August. The pool is held at a winter conservation elevation of 934 feet from the beginning of October until the end of February to provide suitable fish habitat. The pool may rise to elevation 941.1 feet during a flood event, which allows for an additional 117,700 acre-feet of storage above the conservation level. The Minnesota River channel capacity below Lac qui Parle Dam is considered to be 2,500 cfs.

The Chippewa River is a large tributary to the Minnesota River. During non-flood events, the water coming from the Chippewa River is split 50/50, with half flowing through the Chippewa Diversion Dam and continuing down the Chippewa River and the other half flowing over the Watson Sag weir into Lac qui Parle Lake. During flood events, the flow through the Chippewa Diversion Dam is limited to no more than 1,000 cfs until the gate is closed and all water is flowing over the structure. The Chippewa River channel capacity below the Chippewa Diversion Dam is 1,000 cfs.


Fact Sheet 34: Minnesota and North Dakota Flood Control Projects

U.S. Army Corps of Engineers, St. Paul District
Published March 12, 2025
Updated: March 12, 2025
VALLEY CITY, N.D. -- Water flows through the U.S. Army Corps of Engineers, St. Paul District's Baldhill Dam, near Valley City, N.D., July 31.

VALLEY CITY, N.D. -- Water flows through the U.S. Army Corps of Engineers, St. Paul District's Baldhill Dam, near Valley City, N.D., July 31.

High and dry! You don’t see this that very often. Outflows from Baldhill Dam, near Valley City, N.D., were cut from 850 cubic feet per second to 13 cfs so that inspectors could complete a periodic inspection of the structure this week. The Corps’ comprehensive periodic inspections are performed every five years as part of its dam safety program. Routine or annual inspections are conducted at the site each year but do not involve dewatering the stilling basin. http://bit.ly/18MlfbO

High and dry! You don’t see this that very often. Outflows from Baldhill Dam, near Valley City, N.D., were cut from 850 cubic feet per second to 13 cfs so that inspectors could complete a periodic inspection of the structure this week. The Corps’ comprehensive periodic inspections are performed every five years as part of its dam safety program. Routine or annual inspections are conducted at the site each year but do not involve dewatering the stilling basin. http://bit.ly/18MlfbO

The Minnesota and North Dakota Flood Control Section staff is responsible for managing separately budgeted, multi-purpose water resource projects on four major river basins in eastern and north central North Dakota and western Minnesota. Resources managed include 16 dams and associated water management structures with an annual budget of approximately $4 million and 20 full-time and seasonal employees. The breakout between the sections is described below. 

It is the mission of the western office to manage flood control, water supply and shoreline management benefits for communities near and downstream of the projects, as well as provide land and wildlife management activities and recreational opportunities, such as overnight camping, day-use facilities, boat launching facilities and visitor assistance. The personnel provide visitor assistance and enforcement, facility maintenance and dam operations, budgetary, administrative, supervisory, contracting and technical support to all field sites in the area, as well as serve as liaisons between the field sites and the St. Paul District. 

NORTH DAKOTA FLOOD CONTROL SECTION

Baldhill Dam/Lake Ashtabula

Lake Ashtabula is located on the Sheyenne River, 10 miles north of Valley City, North Dakota. The Corps operates and maintains seven recreation areas around Lake Ashtabula, including four campgrounds and 35 miles of the North Country National Scenic Trail which has been certified by the National Park Service. The project has 8,116 acres of fee-land, of which 1,600 acres are managed for wildlife. The staff provide onsite management, as well as interpretive programs on the outdoors, environment and water and boat safety.

The conservation pool elevation at Baldhill Dam is 1,266 feet.  Each year, from October through February, the pool is drawn down to elevation 1,262.5 feet. Depending on the amount of snow water content in the basin, the pool can be further drawn down to a maximum elevation of 1,255 feet by the end of March. The Corps balances storage capacities and flows during floods with the goal to maximize storage while minimizing outflows to reduce flooding downstream. The pool may rise to elevation 1,271 feet, allowing for an additional 30,700 acre-feet of storage above the conservation elevation. The Sheyenne River channel capacity below Baldhill Dam is considered to be 2,400 cubic feet per second, or cfs.

Homme Dam

Homme Dam is located on the south branch of the Park River near Park River, North Dakota. The project is operated and maintained by the staff at Lake Ashtabula. The Walsh County Park Board operates a leased
30-acre park on the south side of the dam.

The conservation pool elevation at Homme Dam is 1,079.8 feet. The maximum drawdown elevation is
1,064 feet. The pool is drawn down before the spring runoff begins because there is no flood control storage above conservation at this project. The flood control storage results from the drawdown. With the exception of the spring runoff and rain events, it is common for this reservoir to have no inflow.    

Souris River Project

The Souris River Project is located on the Souris River in north central North Dakota. The project consists of Lake Darling Dam, two additional water control structures and four pumping stations at the Upper Souris National Wildlife Refuge and five water control structures/embankments at the J. Clark Salyer National Wildlife Refuge. An agreement between the U.S. Fish and Wildlife Service, or USFWS, and the Corps of Engineers identifies the Corps is responsible to maintain the flood control and mitigation structures. Management for this project is provided by the Lake Ashtabula staff.

The Corps takes over management of Lake Darling Dam when spring runoff is expected to be at least a 1 in 10 event. The conservation pool elevation is 1,597 feet.  During the fall of each year, the USFWS lowers the Lake Darling pool elevation by 1 foot prior to Feb. 1. Additional drawdowns may be done in late winter/early spring, depending on the amount of snow water content within the basin. The Corps works with the Saskatchewan Water Authority and the USFWS during a flood to reduce downstream flooding in compliance with the 1989 International Agreement. The pool may rise to elevation 1,601 feet during flood conditions, which allows for an additional 39,700 acre-feet of storage. 

MINNESOTA FLOOD CONTROL SECTION

Orwell Dam

Orwell Dam is located on the Ottertail River near Fergus Falls, Minnesota. The Corps operates two day-use recreation areas near the dam. The Minnesota Department of Natural Resources leases nearly 2,000 acres of this site for wildlife management. Of this area, approximately one-third is a closed sanctuary.

The conservation pool elevation at Orwell Dam is 1,064 feet. Depending on the amount of snow water content in the basin, the pool may be drawn down to a maximum elevation of 1,050 feet in March. The pool may rise to elevation 1,070 feet, allowing for an additional 5,700 acre-feet of storage above the conservation level. The Corps has the authority, in extreme conditions, to increase the flood storage capacity within the reservoir to elevation 1,073 feet. The supplementary surcharge pool provides an additional 3,700 acre-feet of storage above the flood control pool. The Otter Tail River channel capacity below Orwell Dam is considered to be 1,200 cfs.   

Lake Traverse Project

The Lake Traverse Project is located on the Minnesota/South Dakota border near Wheaton, Minnesota. The project consists of three structures: Browns Valley Dike and Reservation and White Rock dams. The project consists of three day-use recreation areas and 640 acres of fee land for wildlife. The Minnesota Department of Natural Resources leases 872 acres for wildlife management purposes. Additionally, the district sign shop is located here. 

The Browns Valley Dike sits on the continental divide between the Red River of the North basin and the Mississippi River basin via the Minnesota River. Water flows into Lake Traverse, through Reservation Dam, into Mud Lake, through White Rock Dam and down the Bois de Sioux River before joining up with the Otter Tail River in Wahpeton, North Dakota, and forming the Red River of the North. 

The conservation elevation at Reservation Dam is 976.8 feet and the conservation elevation at White Rock Dam is 972 feet. There is no drawdown on Mud Lake. The Corps performs a drawdown at Reservation Dam in March, and it can be between elevation 975.5 and 974 feet dependent on the amount of snow water content. During a flood, the gates at White Rock Dam are closed when a trigger has been met (a stage of 12 feet at Wahpeton when the snow water content is above 3 inches or a stage of 10 feet at Wahpeton when the snow water content is below 3 inches and during summer events). The gates are reopened once the flood stage has either fallen back below the trigger or there is no more storage in the pools. During a flood event, the pools may rise to elevation 981 feet allowing for an additional 128,500 acre-feet of storage above conservation. The Bois de Sioux River channel capacity below White Rock Dam is considered to be 1,100 cfs.

Bigstone/Whetstone

Bigstone/Whetstone is located on the Minnesota River near Odessa, Minnesota. In accordance with an agreement with the Corps, the lands and waters are managed by the USFWS as a national wildlife refuge. The Highway 75 dam and related structures are operated and maintained by Corps staff from the La qui Parle Project. After the spring runoff, the USFWS determines what elevation they want the pool held at through December; therefore, conservation pool elevation can vary from 947.3 to 952.3 feet. The Lac qui Parle Project is located downstream of the Highway 75 dam on the Minnesota River.

Lac qui Parle Project

The Lac qui Parle Project is located on the Minnesota River near Watson, Minnesota. The project consists of the Lac qui Parle, Marsh Lake and Chippewa River diversion dams and Watson Sag Weir. The Corps operates and maintains two day-use recreation areas here, one below Lac qui Parle Dam and the other below the Marsh Lake Dam. For wildlife management purposes, 347 acres are leased to the Minnesota Department of Natural Resources.

Water continues to flow southeast down the Minnesota River after leaving Highway 75 Dam. It passes first through Marsh Lake and over Marsh Lake Dam, which has a fixed crest spillway, then into Lac qui Parle Lake and out Lac qui Parle Dam. Following the spring runoff, Lac qui Parle is held at elevation 933.5 feet until May for fish spawning. Following the spawn, the lake is held at a conservation elevation of 933 feet through the end of August. The pool is held at a winter conservation elevation of 934 feet from the beginning of October until the end of February to provide suitable fish habitat. The pool may rise to elevation 941.1 feet during a flood event, which allows for an additional 117,700 acre-feet of storage above the conservation level. The Minnesota River channel capacity below Lac qui Parle Dam is considered to be 2,500 cfs.

The Chippewa River is a large tributary to the Minnesota River. During non-flood events, the water coming from the Chippewa River is split 50/50, with half flowing through the Chippewa Diversion Dam and continuing down the Chippewa River and the other half flowing over the Watson Sag weir into Lac qui Parle Lake. During flood events, the flow through the Chippewa Diversion Dam is limited to no more than 1,000 cfs until the gate is closed and all water is flowing over the structure. The Chippewa River channel capacity below the Chippewa Diversion Dam is 1,000 cfs.