Authorized in the Flood Control Act of 1946, construction on Gathright Dam began in 1974 and completed in 1979. The dam sits about 20 miles upstream from Covington, Va., on the Jackson River in Alleghany County, Va. The dam is a rolled rock fill embankment with a compacted earthen clay core, outlet works and an emergency spillway located at the right abutment. The embankment is 1,310 feet long with a height of 257 feet. The width is 32 feet at the top of the dam with a maximum width of 1000 feet at its base.

(U.S. Army Photo)

Authorized in the Flood Control Act of 1946, construction on Gathright Dam began in 1974 and completed in 1979. The dam sits about 20 miles upstream from Covington, Va., on the Jackson River in Alleghany County, Va. The dam is a rolled rock fill embankment with a compacted earthen clay core, outlet works and an emergency spillway located at the right abutment. The embankment is 1,310 feet long with a height of 257 feet. The width is 32 feet at the top of the dam with a maximum width of 1000 feet at its base.

(U.S. Army Photo)

Upgrading the storm water street drainage system in Camberwell. The deep cut here is through stable hard clay, avoiding the requirement for full 'shuttering'. This method enables the work to be completed rapidly - the cut, preparation, pipe laying and back fill can be completed within hours rather than weeks!

The Little Rock District’s Motor Vessel Shorty Baird and Big Red Crane Barge supported River Assault 2013 on the McClellan-Kerr Arkansas River Navigation System on July 24 by providing an observation platform on the district’s inspection barge. River Assault 2013 involved various U.S. Army Reserve engineer units from around the country that culminated with the construction of a floating improved ribbon bridge across the River.

SAVANNAH, Ga. -- Archeologists working for the U.S. Army Corps of Engineers, Savannah District, aided by divers and salvage operations teams from the U.S. Navy, retrieve a 64-square foot section of a Civil War ironclad warship from the bottom of the Savannah River the evening of Nov. 12, 2013. U.S. Navy photo.

The divers worked in strong currents with near-zero visibility to assess the possibility of lifting a small piece of the Confederate ship’s casemate for archeological testing. A crane lifted it onto a barge anchored near historic Old Fort Jackson on the eastern edge of Savannah. Experts estimate the piece weighs more than 5,000 pounds.

The Confederate navy scuttled the CSS Georgia in 1864 as Union troops approached Savannah. The iron-covered ship remained on the river bottom until 1969 when a dredge removing sediment from the shipping channel struck a portion of the ship, according to Julie Morgan, staff archeologist for the Corps’ Savannah District. A brief recovery effort in the late 1980’s removed two cannon, various types of munitions and other artifacts.

“This retrieval will play a major role in creating a research design to effectively remove the CSS Georgia before expanding the shipping channel along this stretch of the Savannah River,” said Morgan. “It took a dedicated team working in some very tough conditions to bring this piece to the surface.”

Over time the ship’s casemate, the iron-covered upper portion of the warship, came apart. The small portion removed Nov. 12 will give archeologists the ability to assess the condition of the remainder of the ship, according to Morgan, and ensure the team follows protocols from the National Historic Preservation Act of 1966.

The Savannah Harbor Expansion Project (SHEP) includes removal and preservation of CSS Georgia, which sits immediately adjacent to the shipping channel. The SHEP will deepen Savannah’s harbor from its current 42-foot depth to 47 feet, greatly expanding its capability to handle larger cargo vessels. Learn more about SHEP at www.sas.usace.army.mil/Missions/CivilWorks/SavannahHarbor...

Authorized in the Flood Control Act of 1946, construction on Gathright Dam began in 1974 and completed in 1979. The dam sits about 20 miles upstream from Covington, Va., on the Jackson River in Alleghany County, Va. The dam is a rolled rock fill embankment with a compacted earthen clay core, outlet works and an emergency spillway located at the right abutment. The embankment is 1,310 feet long with a height of 257 feet. The width is 32 feet at the top of the dam with a maximum width of 1000 feet at its base.

(U.S. Army Photo)

Authorized in the Flood Control Act of 1946, construction on Gathright Dam began in 1974 and completed in 1979. The dam sits about 20 miles upstream from Covington, Va., on the Jackson River in Alleghany County, Va. The dam is a rolled rock fill embankment with a compacted earthen clay core, outlet works and an emergency spillway located at the right abutment. The embankment is 1,310 feet long with a height of 257 feet. The width is 32 feet at the top of the dam with a maximum width of 1000 feet at its base.

(U.S. Army Photo)

Granite Construction Inc. employees receive a U.S. Army Corps of Engineers safety award Aug. 2, 2013, for their response to a dangerous traffic accident at the Folsom Dam auxiliary spillway construction site July 30. The employees were among the first responders to a truck that fell more than 100 feet from Folsom Lake Crossing Road into the spillway pit, and safely pulled the driver from the truck. Folsom Dam auxiliary spillway project director David Thomas (third from left) presented the awards to (from left) Andrey Koblic, Troy Agler, Kelvin Nall, Doug Swystun, Brian Wing and Craig Humphreys. Award-recipient Mike Davis is not pictured.

Authorized in the Flood Control Act of 1946, construction on Gathright Dam began in 1974 and completed in 1979. The dam sits about 20 miles upstream from Covington, Va., on the Jackson River in Alleghany County, Va. The dam is a rolled rock fill embankment with a compacted earthen clay core, outlet works and an emergency spillway located at the right abutment. The embankment is 1,310 feet long with a height of 257 feet. The width is 32 feet at the top of the dam with a maximum width of 1000 feet at its base.

(U.S. Army Photo)

Authorized in the Flood Control Act of 1946, construction on Gathright Dam began in 1974 and completed in 1979. The dam sits about 20 miles upstream from Covington, Va., on the Jackson River in Alleghany County, Va. The dam is a rolled rock fill embankment with a compacted earthen clay core, outlet works and an emergency spillway located at the right abutment. The embankment is 1,310 feet long with a height of 257 feet. The width is 32 feet at the top of the dam with a maximum width of 1000 feet at its base.

(U.S. Army Photo)

Contractors for the U.S. Army Corps of Engineers Sacramento District fill in cracks (lower half of image) in preparation for concrete placement for the auxiliary spillway control structure at the Folsom Dam in Folsom, Calif., May 30, 2012. Cracks in the rock were filled with a slurry mix called dental mortar. The spillway project is part of the Folsom Dam Joint Federal Project, a joint effort of the Corps, U. S. Bureau of Reclamation, the Central Valley Flood Protection Board and the Sacramento Area Flood Control Agency to improve the safety of the current dam and reduce flood risk for the greater Sacramento area. (U.S. Army photo by Michael J. Nevins/Released)

SAVANNAH, Ga. -- Archeologists working for the U.S. Army Corps of Engineers, Savannah District, aided by divers and salvage operations teams from the U.S. Navy, retrieve a 64-square foot section of a Civil War ironclad warship from the bottom of the Savannah River the evening of Nov. 12, 2013. U.S. Navy photo.

The divers worked in strong currents with near-zero visibility to assess the possibility of lifting a small piece of the Confederate ship’s casemate for archeological testing. A crane lifted it onto a barge anchored near historic Old Fort Jackson on the eastern edge of Savannah. Experts estimate the piece weighs more than 5,000 pounds.

The Confederate navy scuttled the CSS Georgia in 1864 as Union troops approached Savannah. The iron-covered ship remained on the river bottom until 1969 when a dredge removing sediment from the shipping channel struck a portion of the ship, according to Julie Morgan, staff archeologist for the Corps’ Savannah District. A brief recovery effort in the late 1980’s removed two cannon, various types of munitions and other artifacts.

“This retrieval will play a major role in creating a research design to effectively remove the CSS Georgia before expanding the shipping channel along this stretch of the Savannah River,” said Morgan. “It took a dedicated team working in some very tough conditions to bring this piece to the surface.”

Over time the ship’s casemate, the iron-covered upper portion of the warship, came apart. The small portion removed Nov. 12 will give archeologists the ability to assess the condition of the remainder of the ship, according to Morgan, and ensure the team follows protocols from the National Historic Preservation Act of 1966.

The Savannah Harbor Expansion Project (SHEP) includes removal and preservation of CSS Georgia, which sits immediately adjacent to the shipping channel. The SHEP will deepen Savannah’s harbor from its current 42-foot depth to 47 feet, greatly expanding its capability to handle larger cargo vessels. Learn more about SHEP at www.sas.usace.army.mil/Missions/CivilWorks/SavannahHarbor...

Napa Creek’s widened channel and recently completed box culverts (shown at left) were put to use as rain poured in downtown Napa, Calif., March 14, 2012. The culverts - tunnels large enough for a car to drive through - direct flood water out of Napa Creek and reroute it directly to the Napa River, reducing the chance that the creek will spill over into nearby neighborhoods. The work is part of the $14.8 million, American Recovery and Reinvestment Act of 2009-funded Napa Creek Project, a joint effort of the U.S. Army Corps of Engineers Sacramento District, the city of Napa, and the Napa Flood Control and Water Conservation District to reduce the flood risk for the city. (U.S. Army photo by Victor Reynoso/Released)

Authorized in the Flood Control Act of 1946, construction on Gathright Dam began in 1974 and completed in 1979. The dam sits about 20 miles upstream from Covington, Va., on the Jackson River in Alleghany County, Va. The dam is a rolled rock fill embankment with a compacted earthen clay core, outlet works and an emergency spillway located at the right abutment. The embankment is 1,310 feet long with a height of 257 feet. The width is 32 feet at the top of the dam with a maximum width of 1000 feet at its base.

(U.S. Army Photo)

Contractors working for the Sacramento District construct the support system for the rising Folsom Dam auxiliary spillway on March 14. The control structure—essentially a second dam—will stand as tall as the Statue of Liberty upon completion, estimated in October 2017, and will help reduce the risk of flooding in the Sacramento region. (U.S. Army photo by Capt. Michael N. Meyer/Released)

Contractors with the U.S. Army Corps of Engineers Sacramento District use a sonic drill rig to dig borehole test sites May 2, 2006, at Success Dam near Porterville, Calif. The boreholes are used to evaluate the earthen structure and stability of soil and rock underneath the dam during the Corps’ Success Dam Safety Modification Study. (U.S. Army photo by Betty J. Bailey)

Authorized in the Flood Control Act of 1946, construction on Gathright Dam began in 1974 and completed in 1979. The dam sits about 20 miles upstream from Covington, Va., on the Jackson River in Alleghany County, Va. The dam is a rolled rock fill embankment with a compacted earthen clay core, outlet works and an emergency spillway located at the right abutment. The embankment is 1,310 feet long with a height of 257 feet. The width is 32 feet at the top of the dam with a maximum width of 1000 feet at its base.

(U.S. Army Photo)

Flags mark the planned location of native species plantings along the banks of Napa Creek in Napa, Calif., Jan. 18, 2012. The plantings, along with tree trunks placed along the bank, will provide habitat for fish and other river species. The environmental restoration work is part of the $14.8 million Napa Creek Project, funded by the American Recovery and Reinvestment Act of 2009; a joint effort of the U.S. Army Corps of Engineers Sacramento District, the city of Napa, and the Napa Flood Control and Water Conservation District to reduce flood risk for the city. The Corps also widened the creek and is installing box culverts – tunnels large enough for a car to drive through – to channel flood water from the creek more quickly to the Napa River and way from homes and businesses. (U.S. Army photo by Tyler Stalker/Released)

Workers install the largest piece of the first massive Tainter gate for the Folsom Dam auxiliary spillway in Folsom, Calif., June 25, 2014. The 179-ton steel gate is one of six Tainter gates that will control water flow from Folsom Lake into the new auxiliary spillway. The Tainter gates will rotate to control the flow of water through the dam. “We must lower these gates into place with a high level of precision and worksmanship to within one-sixteenth of an inch,” said David Neff, the U.S. Army Corps of Engineers’ design manager for this phase of project. “A gate that is not installed properly could leak and need repairs sooner than otherwise. We are trying to install something that will have a life expectancy of well over a century.” (U.S. Army photo by Capt. Michael N. Meyer/ Released)

A machine shaves off a layer of steel on a bulkhead gate for the new Folsom Dam auxiliary spillway Nov. 28, 2012, at the Oregon Iron Works’ Vancouver, Wash., facility. Personnel from the U.S. Army Corps of Engineers Sacramento District, including commander Col. Bill Leady, took a tour of the site to gauge the progress on 12 massive bulkhead and tainter gates, which will control the flow of water from Folsom Lake through the spillway’s control structure. The spillway project is a joint effort of the U.S. Army Corps of Engineers, the U.S. Bureau of Reclamation, and state and local partners to reduce flood risk throughout the Sacramento region. The project is scheduled to be completed in 2017. (U.S. Army photo by Jacqueline Steiner/Released)

New native species plantings, shown April 12, 2013, line the banks of Napa Creek in Napa, Calif. The plantings, along with tree trunks placed along the bank, will provide habitat for fish and other river species. The environmental restoration work is part of the $14.8 million Napa Creek Project, a joint effort of the U.S. Army Corps of Engineers, the city of Napa and the Napa Flood Control and Water Conservation District funded by the American Recovery and Reinvestment Act of 2009 to reduce flood risk for the city. As part of the project, the Corps also widened the creek and installed box culverts – tunnels large enough for a car to drive through – in October 2012 to help move flood water from the creek more quickly to the Napa River and away from homes and businesses. (U.S. Army photo by Tyler Stalker/Released) Watch the video: bit.ly/163l2Np

Authorized in the Flood Control Act of 1946, construction on Gathright Dam began in 1974 and completed in 1979. The dam sits about 20 miles upstream from Covington, Va., on the Jackson River in Alleghany County, Va. The dam is a rolled rock fill embankment with a compacted earthen clay core, outlet works and an emergency spillway located at the right abutment. The embankment is 1,310 feet long with a height of 257 feet. The width is 32 feet at the top of the dam with a maximum width of 1000 feet at its base.

(U.S. Army Photo)

Construction crews excavate rock and dirt material from Folsom Lake as work continues on the new auxiliary spillway. This work was originally expected to take place during a later phase of the project underwater, which takes longer and is more expensive. Overall, this means that the contractor has more schedule flexibility to meet the expected project completion date of Oct. 2017. (U.S. Army photo by Capt. Michael N. Meyer/Released)

Ray Schembri (in blue), a longtime hydraulic engineer with the U.S. Army Corps of Engineers, New York District, shows USACE personnel the Pompton Lake Dam floodgates in the Passaic River Basin Wednesday September 19, 2012. The floodgates were designed and constructed by the Corps of Engineers and following their completion the gates were turned over to the state of New Jersey, which now owns, maintains and operates them.

Schembri took a group of USACE personnel working on the Passaic River Basin General Re-evaluation Study (including mostly engineers, but also biologists, real estate specialists and more) around the Passaic River Basin to see in person some of the major hydraulic points of interest so they could get a better understanding of the basin. The study is a partnership between the U.S. Army Corps of Engineers and the state of New Jersey to evaluate and compare potential flood risk management alternatives for the Passaic River Basin. Click here to learn more about the study. (photo by Chris Gardner, New York District public affairs)

Looking NE from I-64 on-ramp near 10th St.

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Towboat "Vicksburg" (doc. # 290399) downbound approaching Portland Canal.

Conrail (later L&I) Bridge and upper gates of McAlpine Dam at upper left.

Ohio River mile 605.

Louisville, Kentucky.

February 1988.

file # 88b077.

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Beyond the boat is a vane dike built to modify the current which, when the gates of McAlpine Dam are open to let water pass, runs from near the Kentucky bank toward the open gates. This current (called outdraft because it flows out away from the bank) tends to push downbound tows toward the dam instead of into the canal where they want to go. As I (no expert) understand it, the vane dike deflects some of this outdraft so it flows more toward the entrance to the canal. The diverted water then flows through a gap (partly seen at left) between the downriver end of the dike and the upriver end of Shippingport Island. The top of the dike is only a few feet higher than pool stage, so when the river rises significantly, the dike is submerged and has little or no effect. At the time of this photo, the upper gates were barely open, and while I don't know about the lower gates, I think the outdraft would have been minimal.

See a navigation chart showing locations of vane dike and McAlpine Dam.

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35 mm Kodachrome.

Plustek OpticFilm 7600i and Silverfast 8.

Picture Window 6.

JPEG quality 95.

Authorized in the Flood Control Act of 1946, construction on Gathright Dam began in 1974 and completed in 1979. The dam sits about 20 miles upstream from Covington, Va., on the Jackson River in Alleghany County, Va. The dam is a rolled rock fill embankment with a compacted earthen clay core, outlet works and an emergency spillway located at the right abutment. The embankment is 1,310 feet long with a height of 257 feet. The width is 32 feet at the top of the dam with a maximum width of 1000 feet at its base.

(U.S. Army Photo)

Construction crews are spread out along nearly the entire length of the 3,027-foot downstream chute Sept. 23, 2015, as progress continues on the new Folsom Dam auxiliary spillway. Rebar forms are assembled in preparation of concrete placements. The project is part of a $900-million cooperative effort between the U.S. Army Corps of Engineers, U.S. Bureau of Reclamation, Central Valley Flood Protection Board and the Sacramento Area Flood Control Agency to improve the safety of Folsom Dam and reduce flood risk for the Sacramento area. (U.S. Army photo by Randy Gon / Released)

A bulkhead gate for the new Folsom Dam auxiliary spillway sits on a platform while a machine shaves off a layer of steel Nov. 28, 2012, at the Oregon Iron Works’ Vancouver, Wash., facility. Personnel from the U.S. Army Corps of Engineers Sacramento District, including commander Col. Bill Leady, took a tour of the site to gauge the progress on 12 massive bulkhead and tainter gates, which will control the flow of water from Folsom Lake through the spillway’s control structure. The spillway project is a joint effort of the U.S. Army Corps of Engineers, the U.S. Bureau of Reclamation, and state and local partners to reduce flood risk throughout the Sacramento region. The project is scheduled to be completed in 2017. (U.S. Army photo by Jacqueline Steiner/Released)

Authorized in the Flood Control Act of 1946, construction on Gathright Dam began in 1974 and completed in 1979. The dam sits about 20 miles upstream from Covington, Va., on the Jackson River in Alleghany County, Va. The dam is a rolled rock fill embankment with a compacted earthen clay core, outlet works and an emergency spillway located at the right abutment. The embankment is 1,310 feet long with a height of 257 feet. The width is 32 feet at the top of the dam with a maximum width of 1000 feet at its base.

(U.S. Army Photo)

The Little Rock District’s Motor Vessel Shorty Baird and Big Red Crane Barge supported River Assault 2013 on the McClellan-Kerr Arkansas River Navigation System on July 24 by providing an observation platform on the district’s inspection barge. River Assault 2013 involved various U.S. Army Reserve engineer units from around the country that culminated with the construction of a floating improved ribbon bridge across the River.

Authorized in the Flood Control Act of 1946, construction on Gathright Dam began in 1974 and completed in 1979. The dam sits about 20 miles upstream from Covington, Va., on the Jackson River in Alleghany County, Va. The dam is a rolled rock fill embankment with a compacted earthen clay core, outlet works and an emergency spillway located at the right abutment. The embankment is 1,310 feet long with a height of 257 feet. The width is 32 feet at the top of the dam with a maximum width of 1000 feet at its base.

(U.S. Army Photo)

A stepped-concrete energy dissipater is nearly complete as construction continues on a new dry bypass Sept. 24, 2014, in downtown Napa, California. The energy dissipater is designed to help maintain safe water speeds to prevent erosion to river banks and damage to infrastructure as floodwaters pass through downtown. It’s expected that the bypass, which is scheduled for completion in summer 2015, will be needed to help reduce the risk of flooding during storm events approximately every 2-5 years. (U.S. Army photo by Tyler Stalker/Released)

A flooded neighborhood in Linda, Calif., shown in February 1986 (U.S. Army photo by Michael J. Nevins/Released)

SAVANNAH, Ga. -- Archeologists working for the U.S. Army Corps of Engineers, Savannah District, aided by divers and salvage operations teams from the U.S. Navy, retrieve a 64-square foot section of a Civil War ironclad warship from the bottom of the Savannah River the evening of Nov. 12, 2013. U.S. Navy photo.

The divers worked in strong currents with near-zero visibility to assess the possibility of lifting a small piece of the Confederate ship’s casemate for archeological testing. A crane lifted it onto a barge anchored near historic Old Fort Jackson on the eastern edge of Savannah. Experts estimate the piece weighs more than 5,000 pounds.

The Confederate navy scuttled the CSS Georgia in 1864 as Union troops approached Savannah. The iron-covered ship remained on the river bottom until 1969 when a dredge removing sediment from the shipping channel struck a portion of the ship, according to Julie Morgan, staff archeologist for the Corps’ Savannah District. A brief recovery effort in the late 1980’s removed two cannon, various types of munitions and other artifacts.

“This retrieval will play a major role in creating a research design to effectively remove the CSS Georgia before expanding the shipping channel along this stretch of the Savannah River,” said Morgan. “It took a dedicated team working in some very tough conditions to bring this piece to the surface.”

Over time the ship’s casemate, the iron-covered upper portion of the warship, came apart. The small portion removed Nov. 12 will give archeologists the ability to assess the condition of the remainder of the ship, according to Morgan, and ensure the team follows protocols from the National Historic Preservation Act of 1966.

The Savannah Harbor Expansion Project (SHEP) includes removal and preservation of CSS Georgia, which sits immediately adjacent to the shipping channel. The SHEP will deepen Savannah’s harbor from its current 42-foot depth to 47 feet, greatly expanding its capability to handle larger cargo vessels. Learn more about SHEP at www.sas.usace.army.mil/Missions/CivilWorks/SavannahHarbor...

The labor-intensive job of diverting fresh water into the Savannah National Wildlife Refuge has become easier since the U.S. Army Corps of Engineers Savannah District replaced the old wooden structures with custom-built diversion gates. The Fresh Water Control System was originally installed as a mitigation feature for the 1977 Savannah harbor deepening project. At a cost of $12.5 million, the new stainless steel structures modernize and automate the process of controlling water in the area. Previously, wildlife managers with the U.S. Fish and Wildlife Service could only route water to 3,000 acres of wetlands for waterfowl; with the gate improvements, the water management area has doubled to 6,000 acres. The project was completed in autumn 2011.

Personnel from the New York District of the U.S. Army Corps of Engineers discuss the operations of the Wanaque Reservoir Wednesday September 19, 2012 in northern New Jersey with an engineer from the Water Supply Commission (in the neon vest). They discussed how the reservoir is managed, which is outside the jurisdiction of the Corps of Engineers, in order to better understand how the reservoir and its operations impacts flow in the Passaic River Basin.

Ray Schembri (in blue), a longtime hydraulic engineer with the U.S. Army Corps of Engineers, New York District, took a group of USACE personnel working on the Passaic River Basin General Re-evaluation Study (including mostly engineers, but also biologists, real estate specialists and more) around the Passaic River Basin to see in person some of the major hydrological points of interest so they could get a better understanding of the basin. The study is a partnership between the U.S. Army Corps of Engineers and the state of New Jersey to evaluate and compare potential flood risk management alternatives for the Passaic River Basin. Click here to learn more about the study.

No alternatives being evaluated include alterations to the management of the Wanaque Reservoir, which is outside the scope/jurisdiction of the U.S. Army Corps of Engineers; rather personnel visited it because of its hydrological importance in the basin. (photo by Chris Gardner, New York District public affairs)

Authorized in the Flood Control Act of 1946, construction on Gathright Dam began in 1974 and completed in 1979. The dam sits about 20 miles upstream from Covington, Va., on the Jackson River in Alleghany County, Va. The dam is a rolled rock fill embankment with a compacted earthen clay core, outlet works and an emergency spillway located at the right abutment. The embankment is 1,310 feet long with a height of 257 feet. The width is 32 feet at the top of the dam with a maximum width of 1000 feet at its base.

(U.S. Army Photo)

Authorized in the Flood Control Act of 1946, construction on Gathright Dam began in 1974 and completed in 1979. The dam sits about 20 miles upstream from Covington, Va., on the Jackson River in Alleghany County, Va. The dam is a rolled rock fill embankment with a compacted earthen clay core, outlet works and an emergency spillway located at the right abutment. The embankment is 1,310 feet long with a height of 257 feet. The width is 32 feet at the top of the dam with a maximum width of 1000 feet at its base.

(U.S. Army Photo)

Personnel from the U.S. Army Corps of Engineers look at the Great Falls in Paterson, N.J., while traveling around the Passaic River Basin Wednesday September 19, 2012.Ray Schembri (in blue), a longtime hydraulic engineer with the U.S. Army Corps of Engineers, New York District, took a group of USACE personnel working on the Passaic River Basin General Re-evaluation Study (including mostly engineers, but also biologists, real estate specialists and more) around the Passaic River Basin to see in person some of the major hydraulic points of interest so they could get a better understanding of the basin. The study is a partnership between the U.S. Army Corps of Engineers and the state of New Jersey to evaluate and compare potential flood risk management alternatives for the Passaic River Basin. Click here to learn more about the study.

No alternatives being evaluated include alterations to Great Falls, rather personnel visited it because of its significance in the basin. (photo by Chris Gardner, New York District public affairs)

The gate house and dam spillway at Mansfield Hollow Dam, Mansfield, Conn. Mansfield Hollow Dam lies on the confluence of the Natchaug, Fenton and Mt. Hope Rivers, in Mansfield, Conn. The dam is part of a network of six flood control dams in the Thames River Basin constructed and maintained by the U.S. Army Corps of Engineers. This network helps to reduce flooding in communities within the Thames River Basin by regulating water levels on upstream tributaries in Connecticut and Massachusetts.

The crew onboard Cottrell Contracting Corporation’s dredge LEXINGTON prepares to lower the vessel’s cutter head into the water to dredge the Norfolk International Terminals port facility to 50 feet. The Norfolk District, U.S. Army Corps of Engineers maintenance dredge project allows the port facility to dock large ships with goods destined for stores in the U.S. and throughout the world positively impacting the local, state and regional economy. (U.S. Army Photo/Patrick Bloodgood)

Children from Maple Elementary School take a nature walk with U.S. Army Corps of Engineers park rangers and leaders at the Effie Yeaw Nature Center in Carmichael, Calif., Sept. 27, 2011. The event was in support of President Barack Obama’s America’s Great Outdoors Initiative, established in April 2010, to reconnect the American people with the outdoors. "Today was all about connecting kids with nature,” said Col. Bill Leady, commander of the U.S. Army Corps of Engineers Sacramento District, which hosted the event. ”Being outdoors is so important; not just for our health, but for understanding the natural world that we belong to. We all have a responsibility to help protect it, and as the nation's environmental engineers, it's important for us to share that message," he said. Leady (second from right) was joined by Col. Mike Wehr (far left), commander of the U.S. Army Corps of Engineers South Pacific Division, and Assistant Secretary of the Army for Civil Works, Jo-Ellen Darcy (center). (U.S. Army photo/ Michael J. Nevins)

Authorized in the Flood Control Act of 1946, construction on Gathright Dam began in 1974 and completed in 1979. The dam sits about 20 miles upstream from Covington, Va., on the Jackson River in Alleghany County, Va. The dam is a rolled rock fill embankment with a compacted earthen clay core, outlet works and an emergency spillway located at the right abutment. The embankment is 1,310 feet long with a height of 257 feet. The width is 32 feet at the top of the dam with a maximum width of 1000 feet at its base.

(U.S. Army Photo)

Authorized in the Flood Control Act of 1946, construction on Gathright Dam began in 1974 and completed in 1979. The dam sits about 20 miles upstream from Covington, Va., on the Jackson River in Alleghany County, Va. The dam is a rolled rock fill embankment with a compacted earthen clay core, outlet works and an emergency spillway located at the right abutment. The embankment is 1,310 feet long with a height of 257 feet. The width is 32 feet at the top of the dam with a maximum width of 1000 feet at its base.

(U.S. Army Photo)

Authorized in the Flood Control Act of 1946, construction on Gathright Dam began in 1974 and completed in 1979. The dam sits about 20 miles upstream from Covington, Va., on the Jackson River in Alleghany County, Va. The dam is a rolled rock fill embankment with a compacted earthen clay core, outlet works and an emergency spillway located at the right abutment. The embankment is 1,310 feet long with a height of 257 feet. The width is 32 feet at the top of the dam with a maximum width of 1000 feet at its base.

(U.S. Army Photo)

Crews make emergency repairs to a breached Linda, Calif., levee in February 1986. (U.S. Army Corps of Engineers photo by Michael J. Nevins/Released)

Lee Bass (5th from the left), acting deputy for programs and project management for the U.S. Army Corps of Engineers Sacramento District, joins a long line of dignitaries for the ceremonial groundbreaking of a massive levee improvement project on the Feather River in Yuba City, Calif. (U.S. Army photo by DeDe Cordell/Released)

Authorized in the Flood Control Act of 1946, construction on Gathright Dam began in 1974 and completed in 1979. The dam sits about 20 miles upstream from Covington, Va., on the Jackson River in Alleghany County, Va. The dam is a rolled rock fill embankment with a compacted earthen clay core, outlet works and an emergency spillway located at the right abutment. The embankment is 1,310 feet long with a height of 257 feet. The width is 32 feet at the top of the dam with a maximum width of 1000 feet at its base.

(U.S. Army Photo)

Construction crews simultaneously conduct concrete placement preparations and excavation of a temporary embankment Sept. 23, 2015, for the approach channel of the new Folsom Dam auxiliary spillway. Once the temporary embankment is completely excavated, water will rest against the new auxiliary dam. The project is part of a $900-million cooperative effort between the U.S. Army Corps of Engineers, U.S. Bureau of Reclamation, Central Valley Flood Protection Board and the Sacramento Area Flood Control Agency to improve the safety of Folsom Dam and reduce flood risk for the Sacramento area. (U.S. Army photo by Randy Gon / Released)

Authorized in the Flood Control Act of 1946, construction on Gathright Dam began in 1974 and completed in 1979. The dam sits about 20 miles upstream from Covington, Va., on the Jackson River in Alleghany County, Va. The dam is a rolled rock fill embankment with a compacted earthen clay core, outlet works and an emergency spillway located at the right abutment. The embankment is 1,310 feet long with a height of 257 feet. The width is 32 feet at the top of the dam with a maximum width of 1000 feet at its base.

(U.S. Army Photo)