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Milner Dam & Main Canal: Twin Falls Canal Company, On Snake River, 11 miles West of city of Burley, Idaho, Twin Falls, Twin Falls County, ID

Milner Dam & Main Canal: Twin Falls Canal Company, On Snake River, 11 ...

Significance: Milner Dam and its canal system have national significance in agricultural history as a rare successful example of state-supervised private irrigation development provided for in Senator Joseph M.... More

Milner Dam & Main Canal: Twin Falls Canal Company, On Snake River, 11 miles West of city of Burley, Idaho, Twin Falls, Twin Falls County, ID

Milner Dam & Main Canal: Twin Falls Canal Company, On Snake River, 11 ...

Significance: Milner Dam and its canal system have national significance in agricultural history as a rare successful example of state-supervised private irrigation development provided for in Senator Joseph M.... More

Milner Dam & Main Canal: Twin Falls Canal Company, On Snake River, 11 miles West of city of Burley, Idaho, Twin Falls, Twin Falls County, ID

Milner Dam & Main Canal: Twin Falls Canal Company, On Snake River, 11 ...

Significance: Milner Dam and its canal system have national significance in agricultural history as a rare successful example of state-supervised private irrigation development provided for in Senator Joseph M.... More

Milner Dam & Main Canal: Twin Falls Canal Company, On Snake River, 11 miles West of city of Burley, Idaho, Twin Falls, Twin Falls County, ID

Milner Dam & Main Canal: Twin Falls Canal Company, On Snake River, 11 ...

Significance: Milner Dam and its canal system have national significance in agricultural history as a rare successful example of state-supervised private irrigation development provided for in Senator Joseph M.... More

Milner Dam & Main Canal: Twin Falls Canal Company, On Snake River, 11 miles West of city of Burley, Idaho, Twin Falls, Twin Falls County, ID

Milner Dam & Main Canal: Twin Falls Canal Company, On Snake River, 11 ...

Significance: Milner Dam and its canal system have national significance in agricultural history as a rare successful example of state-supervised private irrigation development provided for in Senator Joseph M.... More

Milner Dam & Main Canal: Twin Falls Canal Company, On Snake River, 11 miles West of city of Burley, Idaho, Twin Falls, Twin Falls County, ID

Milner Dam & Main Canal: Twin Falls Canal Company, On Snake River, 11 ...

Significance: Milner Dam and its canal system have national significance in agricultural history as a rare successful example of state-supervised private irrigation development provided for in Senator Joseph M.... More

Milner Dam & Main Canal: Twin Falls Canal Company, On Snake River, 11 miles West of city of Burley, Idaho, Twin Falls, Twin Falls County, ID

Milner Dam & Main Canal: Twin Falls Canal Company, On Snake River, 11 ...

Significance: Milner Dam and its canal system have national significance in agricultural history as a rare successful example of state-supervised private irrigation development provided for in Senator Joseph M.... More

Milner Dam & Main Canal: Twin Falls Canal Company, On Snake River, 11 miles West of city of Burley, Idaho, Twin Falls, Twin Falls County, ID

Milner Dam & Main Canal: Twin Falls Canal Company, On Snake River, 11 ...

Significance: Milner Dam and its canal system have national significance in agricultural history as a rare successful example of state-supervised private irrigation development provided for in Senator Joseph M.... More

Milner Dam & Main Canal: Twin Falls Canal Company, On Snake River, 11 miles West of city of Burley, Idaho, Twin Falls, Twin Falls County, ID

Milner Dam & Main Canal: Twin Falls Canal Company, On Snake River, 11 ...

Significance: Milner Dam and its canal system have national significance in agricultural history as a rare successful example of state-supervised private irrigation development provided for in Senator Joseph M.... More

Milner Dam & Main Canal: Twin Falls Canal Company, On Snake River, 11 miles West of city of Burley, Idaho, Twin Falls, Twin Falls County, ID

Milner Dam & Main Canal: Twin Falls Canal Company, On Snake River, 11 ...

Significance: Milner Dam and its canal system have national significance in agricultural history as a rare successful example of state-supervised private irrigation development provided for in Senator Joseph M.... More

Little Chute Lock & Dam, Fox River at Mill Street, Little Chute, Outagamie County, WI

Little Chute Lock & Dam, Fox River at Mill Street, Little Chute, Outag...

Significance: The Little Chute Locks and Dam Complex allowed passage for water craft in an otherwise unnavigable stretch of the Fox River at Little Chute created by a 36 foot drop in elevation in a little under... More

Little Chute Lock & Dam, Fox River at Mill Street, Little Chute, Outagamie County, WI

Little Chute Lock & Dam, Fox River at Mill Street, Little Chute, Outag...

Significance: The Little Chute Locks and Dam Complex allowed passage for water craft in an otherwise unnavigable stretch of the Fox River at Little Chute created by a 36 foot drop in elevation in a little under... More

Kaukauna Lock & Dam, Fox River at Canal Street, Kaukauna, Outagamie County, WI

Kaukauna Lock & Dam, Fox River at Canal Street, Kaukauna, Outagamie Co...

Significance: The Kaukauna Locks and Dam Complex provides passage around drop in elevation of 50 feet in the Lower Fox River at Kaukauna. The complex served as an integral part of the Lower Fox River Waterway ... More

Kaukauna Lock & Dam, Fox River at Canal Street, Kaukauna, Outagamie County, WI

Kaukauna Lock & Dam, Fox River at Canal Street, Kaukauna, Outagamie Co...

Significance: The Kaukauna Locks and Dam Complex provides passage around drop in elevation of 50 feet in the Lower Fox River at Kaukauna. The complex served as an integral part of the Lower Fox River Waterway ... More

Kaukauna Lock & Dam, Fox River at Canal Street, Kaukauna, Outagamie County, WI

Kaukauna Lock & Dam, Fox River at Canal Street, Kaukauna, Outagamie Co...

Significance: The Kaukauna Locks and Dam Complex provides passage around drop in elevation of 50 feet in the Lower Fox River at Kaukauna. The complex served as an integral part of the Lower Fox River Waterway ... More

Kaukauna Lock & Dam, Fox River at Canal Street, Kaukauna, Outagamie County, WI

Kaukauna Lock & Dam, Fox River at Canal Street, Kaukauna, Outagamie Co...

Significance: The Kaukauna Locks and Dam Complex provides passage around drop in elevation of 50 feet in the Lower Fox River at Kaukauna. The complex served as an integral part of the Lower Fox River Waterway ... More

Pardee Dam, South Spillway, Mokulumne River, Valley Springs, Calaveras County, CA

Pardee Dam, South Spillway, Mokulumne River, Valley Springs, Calaveras...

Survey number: HAER CA-168-B Public domain photograph of river bank, water, free to use, no copyright restrictions image - Picryl description

Long Lake Hydroelectric Plant, Spillway Dam, Spanning Spokane River, Ford, Stevens County, WA

Long Lake Hydroelectric Plant, Spillway Dam, Spanning Spokane River, F...

Significance: The Long Lake hydroelectric facility is significant as one of the earliest and, for many years, largest hydroelectric generating facilities in The Washington Water Power Company's electrical power... More

Long Lake Hydroelectric Plant, Spillway Dam, Spanning Spokane River, Ford, Stevens County, WA

Long Lake Hydroelectric Plant, Spillway Dam, Spanning Spokane River, F...

Significance: The Long Lake hydroelectric facility is significant as one of the earliest and, for many years, largest hydroelectric generating facilities in The Washington Water Power Company's electrical power... More

Long Lake Hydroelectric Plant, Spillway Dam, Spanning Spokane River, Ford, Stevens County, WA

Long Lake Hydroelectric Plant, Spillway Dam, Spanning Spokane River, F...

Significance: The Long Lake hydroelectric facility is significant as one of the earliest and, for many years, largest hydroelectric generating facilities in The Washington Water Power Company's electrical power... More

Upper Mississippi River 9-Foot Channel, Lock & Dam No. 6, Trempealeau, Trempealeau County, WI

Upper Mississippi River 9-Foot Channel, Lock & Dam No. 6, Trempealeau,...

Significance: The Upper Mississippi River Lock and Dam Project represents one of the largest and most ambitious of such undertakings. With roots in the Progressive Era, the project was adopted by New Deal prop... More

Upper Mississippi River 9-Foot Channel, Lock & Dam No. 6, Trempealeau, Trempealeau County, WI

Upper Mississippi River 9-Foot Channel, Lock & Dam No. 6, Trempealeau,...

Significance: The Upper Mississippi River Lock and Dam Project represents one of the largest and most ambitious of such undertakings. With roots in the Progressive Era, the project was adopted by New Deal prop... More

Upper Mississippi River 9-Foot Channel, Lock & Dam No. 6, Trempealeau, Trempealeau County, WI

Upper Mississippi River 9-Foot Channel, Lock & Dam No. 6, Trempealeau,...

Significance: The Upper Mississippi River Lock and Dam Project represents one of the largest and most ambitious of such undertakings. With roots in the Progressive Era, the project was adopted by New Deal prop... More

Upper Mississippi River 9-Foot Channel, Lock & Dam No. 6, Trempealeau, Trempealeau County, WI

Upper Mississippi River 9-Foot Channel, Lock & Dam No. 6, Trempealeau,...

Significance: The Upper Mississippi River Lock and Dam Project represents one of the largest and most ambitious of such undertakings. With roots in the Progressive Era, the project was adopted by New Deal prop... More

Upper Mississippi River 9-Foot Channel, Lock & Dam No. 6, Trempealeau, Trempealeau County, WI

Upper Mississippi River 9-Foot Channel, Lock & Dam No. 6, Trempealeau,...

Significance: The Upper Mississippi River Lock and Dam Project represents one of the largest and most ambitious of such undertakings. With roots in the Progressive Era, the project was adopted by New Deal prop... More

Upper Mississippi River 9-Foot Channel, Lock & Dam No. 6, Trempealeau, Trempealeau County, WI

Upper Mississippi River 9-Foot Channel, Lock & Dam No. 6, Trempealeau,...

Significance: The Upper Mississippi River Lock and Dam Project represents one of the largest and most ambitious of such undertakings. With roots in the Progressive Era, the project was adopted by New Deal prop... More

Upper Mississippi River 9-Foot Channel, Lock & Dam No. 6, Trempealeau, Trempealeau County, WI

Upper Mississippi River 9-Foot Channel, Lock & Dam No. 6, Trempealeau,...

Significance: The Upper Mississippi River Lock and Dam Project represents one of the largest and most ambitious of such undertakings. With roots in the Progressive Era, the project was adopted by New Deal prop... More

Upper Souris National Wildlife Refuge, Dam 83, Souris River Basin, Foxholm, Ward County, ND

Upper Souris National Wildlife Refuge, Dam 83, Souris River Basin, Fox...

Significance: The dams within the Upper Souris National Wildlife Refuge represent a historical movement to preserve wildlife and wildlife habitat in the United States, which began in the mid-19th century and co... More

Upper Souris National Wildlife Refuge, Dam 96, Souris River Basin, Foxholm, Ward County, ND

Upper Souris National Wildlife Refuge, Dam 96, Souris River Basin, Fox...

Significance: The dams within the J. Clark Salyer National Wildlife Refuge represent a historical movement to preserve wildlife and wildlife habitat in the United States, which began in the mid-19th century and... More

Upper Souris National Wildlife Refuge, Dam 96, Souris River Basin, Foxholm, Ward County, ND

Upper Souris National Wildlife Refuge, Dam 96, Souris River Basin, Fox...

Significance: The dams within the J. Clark Salyer National Wildlife Refuge represent a historical movement to preserve wildlife and wildlife habitat in the United States, which began in the mid-19th century and... More

Upper Souris National Wildlife Refuge, Dam 87, Souris River Basin, Foxholm, Ward County, ND

Upper Souris National Wildlife Refuge, Dam 87, Souris River Basin, Fox...

Significance: The dams within the Upper Souris National Wildlife Refuge represent a historical movement to preserve wildlife and wildlife habitat in the United States, which began in the mid-19th century and co... More

Upper Souris National Wildlife Refuge, Dam 87, Souris River Basin, Foxholm, Ward County, ND

Upper Souris National Wildlife Refuge, Dam 87, Souris River Basin, Fox...

Significance: The dams within the Upper Souris National Wildlife Refuge represent a historical movement to preserve wildlife and wildlife habitat in the United States, which began in the mid-19th century and co... More

Upper Souris National Wildlife Refuge, Dam 87, Souris River Basin, Foxholm, Ward County, ND

Upper Souris National Wildlife Refuge, Dam 87, Souris River Basin, Fox...

Significance: The dams within the Upper Souris National Wildlife Refuge represent a historical movement to preserve wildlife and wildlife habitat in the United States, which began in the mid-19th century and co... More

Cedars Lock & Dam, 4527 East Wisconsin Road, Little Chute, Outagamie County, WI

Cedars Lock & Dam, 4527 East Wisconsin Road, Little Chute, Outagamie C...

Significance: The Cedars Lock and Dam Complex allowed passage around the Cedars Rapids for watercraft navigating between Little Chute and Appleton and thus served as one integral part of the Lower Fox River Wat... More

Cooke Hydroelectric Plant, Spillway, Cook Dam Road at Au Sable River, Oscoda, Iosco County, MI

Cooke Hydroelectric Plant, Spillway, Cook Dam Road at Au Sable River, ...

Picryl description: Public domain image of an arch stone structure, bridge, or tunnel, free to use, no copyright restrictions.

Boise Project, Deer Flat Embankments, Lake Lowell, Nampa, Canyon County, ID

Boise Project, Deer Flat Embankments, Lake Lowell, Nampa, Canyon Count...

Significance: The Deer Flat Embankments, which impound Lake Lowell, are significant as the first large storage feature built by the U.S. Reclamation Service on the Boise Project, one of the largest of the early... More

Boise Project, Deer Flat Embankments, Lake Lowell, Nampa, Canyon County, ID

Boise Project, Deer Flat Embankments, Lake Lowell, Nampa, Canyon Count...

Significance: The Deer Flat Embankments, which impound Lake Lowell, are significant as the first large storage feature built by the U.S. Reclamation Service on the Boise Project, one of the largest of the early... More

Boise Project, Deer Flat Embankments, Lake Lowell, Nampa, Canyon County, ID

Boise Project, Deer Flat Embankments, Lake Lowell, Nampa, Canyon Count...

Significance: The Deer Flat Embankments, which impound Lake Lowell, are significant as the first large storage feature built by the U.S. Reclamation Service on the Boise Project, one of the largest of the early... More

Rapide Croche Lock & Dam, At 22.8 mile marker on Lower Fox River, Wrightstown, Brown County, WI

Rapide Croche Lock & Dam, At 22.8 mile marker on Lower Fox River, Wrig...

Significance: The Rapide Croche Lock and Dam Complex allowed water navigation around rapids in the Fox River for boats traveling between Kaukauna and Green Bay. This complex served as an integral part of the Lo... More

Upper Mississippi River 9-Foot Channel, Lock & Dam No. 8, On Mississippi River near Houston County, MN, Genoa, Vernon County, WI

Upper Mississippi River 9-Foot Channel, Lock & Dam No. 8, On Mississip...

See HAER MN-20, Upper Mississippi River Nine-Foot Channel Project History, Locks and Dams 3-10, for additional information. Significance: The Upper Mississippi River Lock and Dam Project represents one of the l... More

Upper Mississippi River 9-Foot Channel, Lock & Dam No. 8, On Mississippi River near Houston County, MN, Genoa, Vernon County, WI

Upper Mississippi River 9-Foot Channel, Lock & Dam No. 8, On Mississip...

See HAER MN-20, Upper Mississippi River Nine-Foot Channel Project History, Locks and Dams 3-10, for additional information. Significance: The Upper Mississippi River Lock and Dam Project represents one of the l... More

Upper Mississippi River 9-Foot Channel, Lock & Dam No. 8, On Mississippi River near Houston County, MN, Genoa, Vernon County, WI

Upper Mississippi River 9-Foot Channel, Lock & Dam No. 8, On Mississip...

See HAER MN-20, Upper Mississippi River Nine-Foot Channel Project History, Locks and Dams 3-10, for additional information. Significance: The Upper Mississippi River Lock and Dam Project represents one of the l... More

Upper Mississippi River 9-Foot Channel, Lock & Dam No. 8, On Mississippi River near Houston County, MN, Genoa, Vernon County, WI

Upper Mississippi River 9-Foot Channel, Lock & Dam No. 8, On Mississip...

See HAER MN-20, Upper Mississippi River Nine-Foot Channel Project History, Locks and Dams 3-10, for additional information. Significance: The Upper Mississippi River Lock and Dam Project represents one of the l... More

Upper Mississippi River 9-Foot Channel, Lock & Dam No. 8, On Mississippi River near Houston County, MN, Genoa, Vernon County, WI

Upper Mississippi River 9-Foot Channel, Lock & Dam No. 8, On Mississip...

See HAER MN-20, Upper Mississippi River Nine-Foot Channel Project History, Locks and Dams 3-10, for additional information. Significance: The Upper Mississippi River Lock and Dam Project represents one of the l... More

Upper Mississippi River 9-Foot Channel, Lock & Dam No. 8, On Mississippi River near Houston County, MN, Genoa, Vernon County, WI

Upper Mississippi River 9-Foot Channel, Lock & Dam No. 8, On Mississip...

See HAER MN-20, Upper Mississippi River Nine-Foot Channel Project History, Locks and Dams 3-10, for additional information. Significance: The Upper Mississippi River Lock and Dam Project represents one of the l... More

Upper Mississippi River 9-Foot Channel, Lock & Dam No. 8, On Mississippi River near Houston County, MN, Genoa, Vernon County, WI

Upper Mississippi River 9-Foot Channel, Lock & Dam No. 8, On Mississip...

See HAER MN-20, Upper Mississippi River Nine-Foot Channel Project History, Locks and Dams 3-10, for additional information. Significance: The Upper Mississippi River Lock and Dam Project represents one of the l... More

Upper Mississippi River 9-Foot Channel, Lock & Dam No. 8, On Mississippi River near Houston County, MN, Genoa, Vernon County, WI

Upper Mississippi River 9-Foot Channel, Lock & Dam No. 8, On Mississip...

See HAER MN-20, Upper Mississippi River Nine-Foot Channel Project History, Locks and Dams 3-10, for additional information. Significance: The Upper Mississippi River Lock and Dam Project represents one of the l... More

J. Clark Salyer National Wildlife Refuge, Dam 357, Along Lower Souris River, Kramer, Bottineau County, ND

J. Clark Salyer National Wildlife Refuge, Dam 357, Along Lower Souris ...

Significance: The dams within the J. Clark Salyer National Wildlife Refuge represent a historical movement to preserve wildlife and wildlife habitat in the United States, which began in the mid-19th century and... More

J. Clark Salyer National Wildlife Refuge, Dam 357, Along Lower Souris River, Kramer, Bottineau County, ND

J. Clark Salyer National Wildlife Refuge, Dam 357, Along Lower Souris ...

Significance: The dams within the J. Clark Salyer National Wildlife Refuge represent a historical movement to preserve wildlife and wildlife habitat in the United States, which began in the mid-19th century and... More

J. Clark Salyer National Wildlife Refuge, Dam 357, Along Lower Souris River, Kramer, Bottineau County, ND

J. Clark Salyer National Wildlife Refuge, Dam 357, Along Lower Souris ...

Significance: The dams within the J. Clark Salyer National Wildlife Refuge represent a historical movement to preserve wildlife and wildlife habitat in the United States, which began in the mid-19th century and... More

J. Clark Salyer National Wildlife Refuge, Dam 357, Along Lower Souris River, Kramer, Bottineau County, ND

J. Clark Salyer National Wildlife Refuge, Dam 357, Along Lower Souris ...

Significance: The dams within the J. Clark Salyer National Wildlife Refuge represent a historical movement to preserve wildlife and wildlife habitat in the United States, which began in the mid-19th century and... More

J. Clark Salyer National Wildlife Refuge, Dam 357, Along Lower Souris River, Kramer, Bottineau County, ND

J. Clark Salyer National Wildlife Refuge, Dam 357, Along Lower Souris ...

Significance: The dams within the J. Clark Salyer National Wildlife Refuge represent a historical movement to preserve wildlife and wildlife habitat in the United States, which began in the mid-19th century and... More

Abbeville Hydroelectric Power Plant, State Highway 284 & County Road 72, Rocky River (historical), Abbeville County, SC

Abbeville Hydroelectric Power Plant, State Highway 284 & County Road 7...

Significance: J. Roy Pennell acquired property and began construction of the multiple arch reinforced concrete dam in 1933. Pennell abandoned the project in 1935 and it was completed by the City of Abbeville w... More

Prado Dam, Spillway, Santa Ana River near junction of State Highways 71 & 91, Corona, Riverside County, CA

Prado Dam, Spillway, Santa Ana River near junction of State Highways 7...

Public domain image related to the State of California, free to use, no copyright restrictions image - Picryl description

Prado Dam, Spillway, Santa Ana River near junction of State Highways 71 & 91, Corona, Riverside County, CA

Prado Dam, Spillway, Santa Ana River near junction of State Highways 7...

Public domain scan of architectural drawing, architecture, free to use, no copyright restrictions image - Picryl description

Boise Project, Boise River Diversion Dam, Across Boise River, Boise, Ada County, ID

Boise Project, Boise River Diversion Dam, Across Boise River, Boise, A...

Significance: The Boise Diversion Dam and Powerplant are important components in the Boise Project, a Bureau of Reclamation effort to irrigate the Boise and Payette River valleys in Idaho. The diversion dam, co... More

Boise Project, Boise River Diversion Dam, Across Boise River, Boise, Ada County, ID

Boise Project, Boise River Diversion Dam, Across Boise River, Boise, A...

Significance: The Boise Diversion Dam and Powerplant are important components in the Boise Project, a Bureau of Reclamation effort to irrigate the Boise and Payette River valleys in Idaho. The diversion dam, co... More

Boise Project, Boise River Diversion Dam, Across Boise River, Boise, Ada County, ID

Boise Project, Boise River Diversion Dam, Across Boise River, Boise, A...

Significance: The Boise Diversion Dam and Powerplant are important components in the Boise Project, a Bureau of Reclamation effort to irrigate the Boise and Payette River valleys in Idaho. The diversion dam, co... More

Boise Project, Boise River Diversion Dam, Across Boise River, Boise, Ada County, ID

Boise Project, Boise River Diversion Dam, Across Boise River, Boise, A...

Significance: The Boise Diversion Dam and Powerplant are important components in the Boise Project, a Bureau of Reclamation effort to irrigate the Boise and Payette River valleys in Idaho. The diversion dam, co... More

Boise Project, Boise River Diversion Dam, Across Boise River, Boise, Ada County, ID

Boise Project, Boise River Diversion Dam, Across Boise River, Boise, A...

Significance: The Boise Diversion Dam and Powerplant are important components in the Boise Project, a Bureau of Reclamation effort to irrigate the Boise and Payette River valleys in Idaho. The diversion dam, co... More

Boise Project, Boise River Diversion Dam, Across Boise River, Boise, Ada County, ID

Boise Project, Boise River Diversion Dam, Across Boise River, Boise, A...

Significance: The Boise Diversion Dam and Powerplant are important components in the Boise Project, a Bureau of Reclamation effort to irrigate the Boise and Payette River valleys in Idaho. The diversion dam, co... More

Boise Project, Boise River Diversion Dam, Across Boise River, Boise, Ada County, ID

Boise Project, Boise River Diversion Dam, Across Boise River, Boise, A...

Significance: The Boise Diversion Dam and Powerplant are important components in the Boise Project, a Bureau of Reclamation effort to irrigate the Boise and Payette River valleys in Idaho. The diversion dam, co... More

Mountain Dell Dam, Parley's Canyon, Northwest side of I-80, West of State Route 39, Salt Lake City, Salt Lake County, UT

Mountain Dell Dam, Parley's Canyon, Northwest side of I-80, West of St...

Significance: Mountain Dell Dam is an early application of multiple-arch reinforced-concrete construction to dam engineering. The design developed by John S. Eastwood consisted of a series of arches set at an a... More

Little Rock Creek Dam, Little Rock Creek, Littlerock, Los Angeles County, CA

Little Rock Creek Dam, Little Rock Creek, Littlerock, Los Angeles Coun...

Significance: When built the Littlerock Dam was the tallest reinforced concrete multiple arch dam in the world. For over fifty years it has provided water for the South Antelope Valley and contributed to the v... More

Little Rock Creek Dam, Little Rock Creek, Littlerock, Los Angeles County, CA

Little Rock Creek Dam, Little Rock Creek, Littlerock, Los Angeles Coun...

Significance: When built the Littlerock Dam was the tallest reinforced concrete multiple arch dam in the world. For over fifty years it has provided water for the South Antelope Valley and contributed to the v... More

Little Rock Creek Dam, Little Rock Creek, Littlerock, Los Angeles County, CA

Little Rock Creek Dam, Little Rock Creek, Littlerock, Los Angeles Coun...

Significance: When built the Littlerock Dam was the tallest reinforced concrete multiple arch dam in the world. For over fifty years it has provided water for the South Antelope Valley and contributed to the v... More

Little Rock Creek Dam, Little Rock Creek, Littlerock, Los Angeles County, CA

Little Rock Creek Dam, Little Rock Creek, Littlerock, Los Angeles Coun...

Significance: When built the Littlerock Dam was the tallest reinforced concrete multiple arch dam in the world. For over fifty years it has provided water for the South Antelope Valley and contributed to the v... More

Pathfinder Dam in Wyoming under construction in June of 1908

Pathfinder Dam in Wyoming under construction in June of 1908

Illus. in: The Bureau of Reclamation : Origins and Growth to 1945, v. 1 / William D. Rowley. Denver, Colorado : U.S. Department of the Interior Bureau of Reclamation, 2006, p. 121 (3.17)

Utah Power Company, Granite Hydroelectric Plant, Holladay, Salt Lake County, UT

Utah Power Company, Granite Hydroelectric Plant, Holladay, Salt Lake C...

Survey number: HAER UT-4 Building/structure dates: 1896 Initial Construction

J. Clark Salyer National Wildlife Refuge, Dam 320, Along Lower Souris River, Kramer, Bottineau County, ND

J. Clark Salyer National Wildlife Refuge, Dam 320, Along Lower Souris ...

Picryl description: Public domain image of wildlife, wild animals, nature, free to use, no copyright restrictions.

J. Clark Salyer National Wildlife Refuge, Dam 320, Along Lower Souris River, Kramer, Bottineau County, ND

J. Clark Salyer National Wildlife Refuge, Dam 320, Along Lower Souris ...

Picryl description: Public domain image of wildlife, wild animals, nature, free to use, no copyright restrictions.

J. Clark Salyer National Wildlife Refuge, Dam 320, Along Lower Souris River, Kramer, Bottineau County, ND

J. Clark Salyer National Wildlife Refuge, Dam 320, Along Lower Souris ...

Picryl description: Public domain image of a park, trees, outdoors, free to use, no copyright restrictions.

Champlain Canal, Waterford Locks, U.S. Route 4, Waterford, Saratoga County, NY

Champlain Canal, Waterford Locks, U.S. Route 4, Waterford, Saratoga Co...

Significance: The Champlain Canal was built to link Lake Champlain with the Erie Canal and with the tidewater of the Hudson River. The Canal is presently part of the New York State Barge Canal system, the most... More

Skagit Power Development, Gorge High Dam, On Skagit River, 2.9 miles upstream from Newhalem, Newhalem, Whatcom County, WA

Skagit Power Development, Gorge High Dam, On Skagit River, 2.9 miles u...

Unprocessed Field note material exists for this structure: FN-5 Survey number: HAER WA-24-C Building/structure dates: 1961 Initial Construction

Skagit Power Development, Gorge High Dam, On Skagit River, 2.9 miles upstream from Newhalem, Newhalem, Whatcom County, WA

Skagit Power Development, Gorge High Dam, On Skagit River, 2.9 miles u...

Unprocessed Field note material exists for this structure: FN-5 Survey number: HAER WA-24-C Building/structure dates: 1961 Initial Construction

Schofield Barracks Military Reservation, Ku Tree Reservoir, Spillway, Kalakoa Stream, East Range, Wahiawa, Honolulu County, HI

Schofield Barracks Military Reservation, Ku Tree Reservoir, Spillway, ...

Significance: The spillway is significant as an element of the Ku Tree Reservoir and as a good example of a spillway constructed for an earth-fill dam in Hawaii in the 1920s. The spillway embodies the distinct... More

Whitman Estate, Lower Pond Spillway, Approx. .5 mile south of intersection of DE72 & Ebeneezer Church Road, Newark, New Castle County, DE

Whitman Estate, Lower Pond Spillway, Approx. .5 mile south of intersec...

Significance: The Lower Pond Spillway is a contributing element to the Whiteman Estate, a good example of the combination of Colonial and Colonial Revival styles which incorporates mid-twentieth-century landsca... More

American Falls Water, Power & Light Company, Island Power Plant, Snake River, below American Falls Dam, American Falls, Power County, ID

American Falls Water, Power & Light Company, Island Power Plant, Snake...

Significance: This site represents technology associated with the first era of long distance electric power transmission in the state. It is also a representative example of an early low-head hydroelectric pow... More

American Falls Water, Power & Light Company, Island Power Plant, Snake River, below American Falls Dam, American Falls, Power County, ID

American Falls Water, Power & Light Company, Island Power Plant, Snake...

Significance: This site represents technology associated with the first era of long distance electric power transmission in the state. It is also a representative example of an early low-head hydroelectric pow... More

American Falls Water, Power & Light Company, Island Power Plant, Snake River, below American Falls Dam, American Falls, Power County, ID

American Falls Water, Power & Light Company, Island Power Plant, Snake...

Significance: This site represents technology associated with the first era of long distance electric power transmission in the state. It is also a representative example of an early low-head hydroelectric pow... More

American Falls Water, Power & Light Company, Island Power Plant, Snake River, below American Falls Dam, American Falls, Power County, ID

American Falls Water, Power & Light Company, Island Power Plant, Snake...

Significance: This site represents technology associated with the first era of long distance electric power transmission in the state. It is also a representative example of an early low-head hydroelectric pow... More

Skagit Power Development, Diablo Dam, On Skagit River, 6.9 miles upstream from Newhalem, Newhalem, Whatcom County, WA

Skagit Power Development, Diablo Dam, On Skagit River, 6.9 miles upstr...

Unprocessed Field note material exists for this structure: FN-7 Survey number: HAER WA-24-F Building/structure dates: 1930 Initial Construction

J. Clark Salyer National Wildlife Refuge, Dam 341, Along Lower Souris River, Kramer, Bottineau County, ND

J. Clark Salyer National Wildlife Refuge, Dam 341, Along Lower Souris ...

Significance: The dams within the J. Clark Salyer National Wildlife Refuge represent a historical movement to preserve wildlife and wildlife habitat in the United States, which began in the mid-19th century and... More

J. Clark Salyer National Wildlife Refuge, Dam 341, Along Lower Souris River, Kramer, Bottineau County, ND

J. Clark Salyer National Wildlife Refuge, Dam 341, Along Lower Souris ...

Significance: The dams within the J. Clark Salyer National Wildlife Refuge represent a historical movement to preserve wildlife and wildlife habitat in the United States, which began in the mid-19th century and... More

Appleton Locks & Dams, Fox River at Oneida Street, Appleton, Outagamie County, WI

Appleton Locks & Dams, Fox River at Oneida Street, Appleton, Outagamie...

Significance: The Appleton Locks and Dams Complex allows passage for watercraft around 1 1/2 miles of rapids as well as a 4 foot falls present in the Lower Fox River at Appleton. Survey number: HAER WI-84 Bui... More

Milner Dam & Main Canal: Twin Falls Canal Company, On Snake River, 11 miles West of city of Burley, Idaho, Twin Falls, Twin Falls County, ID

Milner Dam & Main Canal: Twin Falls Canal Company, On Snake River, 11 ...

Significance: Milner Dam and its canal system have national significance in agricultural history as a rare successful example of state-supervised private irrigation development provided for in Senator Joseph M.... More

Milner Dam & Main Canal: Twin Falls Canal Company, On Snake River, 11 miles West of city of Burley, Idaho, Twin Falls, Twin Falls County, ID

Milner Dam & Main Canal: Twin Falls Canal Company, On Snake River, 11 ...

Significance: Milner Dam and its canal system have national significance in agricultural history as a rare successful example of state-supervised private irrigation development provided for in Senator Joseph M.... More

Milner Dam & Main Canal: Twin Falls Canal Company, On Snake River, 11 miles West of city of Burley, Idaho, Twin Falls, Twin Falls County, ID

Milner Dam & Main Canal: Twin Falls Canal Company, On Snake River, 11 ...

Significance: Milner Dam and its canal system have national significance in agricultural history as a rare successful example of state-supervised private irrigation development provided for in Senator Joseph M.... More

Milner Dam & Main Canal: Twin Falls Canal Company, On Snake River, 11 miles West of city of Burley, Idaho, Twin Falls, Twin Falls County, ID

Milner Dam & Main Canal: Twin Falls Canal Company, On Snake River, 11 ...

Significance: Milner Dam and its canal system have national significance in agricultural history as a rare successful example of state-supervised private irrigation development provided for in Senator Joseph M.... More

Milner Dam & Main Canal: Twin Falls Canal Company, On Snake River, 11 miles West of city of Burley, Idaho, Twin Falls, Twin Falls County, ID

Milner Dam & Main Canal: Twin Falls Canal Company, On Snake River, 11 ...

Significance: Milner Dam and its canal system have national significance in agricultural history as a rare successful example of state-supervised private irrigation development provided for in Senator Joseph M.... More

Milner Dam & Main Canal: Twin Falls Canal Company, On Snake River, 11 miles West of city of Burley, Idaho, Twin Falls, Twin Falls County, ID

Milner Dam & Main Canal: Twin Falls Canal Company, On Snake River, 11 ...

Significance: Milner Dam and its canal system have national significance in agricultural history as a rare successful example of state-supervised private irrigation development provided for in Senator Joseph M.... More

Milner Dam & Main Canal: Twin Falls Canal Company, On Snake River, 11 miles West of city of Burley, Idaho, Twin Falls, Twin Falls County, ID

Milner Dam & Main Canal: Twin Falls Canal Company, On Snake River, 11 ...

Significance: Milner Dam and its canal system have national significance in agricultural history as a rare successful example of state-supervised private irrigation development provided for in Senator Joseph M.... More

Milner Dam & Main Canal: Twin Falls Canal Company, On Snake River, 11 miles West of city of Burley, Idaho, Twin Falls, Twin Falls County, ID

Milner Dam & Main Canal: Twin Falls Canal Company, On Snake River, 11 ...

Significance: Milner Dam and its canal system have national significance in agricultural history as a rare successful example of state-supervised private irrigation development provided for in Senator Joseph M.... More

Milner Dam & Main Canal: Twin Falls Canal Company, On Snake River, 11 miles West of city of Burley, Idaho, Twin Falls, Twin Falls County, ID

Milner Dam & Main Canal: Twin Falls Canal Company, On Snake River, 11 ...

Significance: Milner Dam and its canal system have national significance in agricultural history as a rare successful example of state-supervised private irrigation development provided for in Senator Joseph M.... More

Milner Dam & Main Canal: Twin Falls Canal Company, On Snake River, 11 miles West of city of Burley, Idaho, Twin Falls, Twin Falls County, ID

Milner Dam & Main Canal: Twin Falls Canal Company, On Snake River, 11 ...

Significance: Milner Dam and its canal system have national significance in agricultural history as a rare successful example of state-supervised private irrigation development provided for in Senator Joseph M.... More

Milner Dam & Main Canal: Twin Falls Canal Company, On Snake River, 11 miles West of city of Burley, Idaho, Twin Falls, Twin Falls County, ID

Milner Dam & Main Canal: Twin Falls Canal Company, On Snake River, 11 ...

Significance: Milner Dam and its canal system have national significance in agricultural history as a rare successful example of state-supervised private irrigation development provided for in Senator Joseph M.... More

Little Chute Lock & Dam, Fox River at Mill Street, Little Chute, Outagamie County, WI

Little Chute Lock & Dam, Fox River at Mill Street, Little Chute, Outag...

Significance: The Little Chute Locks and Dam Complex allowed passage for water craft in an otherwise unnavigable stretch of the Fox River at Little Chute created by a 36 foot drop in elevation in a little under... More

Little Chute Lock & Dam, Fox River at Mill Street, Little Chute, Outagamie County, WI

Little Chute Lock & Dam, Fox River at Mill Street, Little Chute, Outag...

Significance: The Little Chute Locks and Dam Complex allowed passage for water craft in an otherwise unnavigable stretch of the Fox River at Little Chute created by a 36 foot drop in elevation in a little under... More

Pardee Dam, South Spillway, Mokulumne River, Valley Springs, Calaveras County, CA

Pardee Dam, South Spillway, Mokulumne River, Valley Springs, Calaveras...

Survey number: HAER CA-168-B Public domain photograph of river bank, water, free to use, no copyright restrictions image - Picryl description

Pardee Dam, South Spillway, Mokulumne River, Valley Springs, Calaveras County, CA

Pardee Dam, South Spillway, Mokulumne River, Valley Springs, Calaveras...

Survey number: HAER CA-168-B Public domain photograph of river bank, water, free to use, no copyright restrictions image - Picryl description

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