Mid-Atlantic United States flood of 2006

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Mid-Atlantic United States flood of 2006

The Delaware River overspilled its banks and overtook U.S. Highway 46 in Columbia, N.J.
Duration	June 25–July 5
Damages	$1 billion[1]
Fatalities	16
Areas affected	Delaware, Maryland, New Jersey, New York, Pennsylvania, Virginia, Washington, DC

The Mid-Atlantic United States flood of 2006 was a significant flood that affected much of the Mid-Atlantic region of the eastern United States. The flooding was very widespread, affecting numerous rivers, lakes and communities from upstate New York to North Carolina. It is widely considered to be the worst flooding in the region since Hurricane David in 1979. It was also one of the worst floodings in the United States since Hurricane Katrina in August 2005.

At least 16 deaths have been blamed on the resultant flood.^[2]

[edit] Meteorological history

NOAA/USGS map of river flooding, June 29, 2006, around 1530 UTC. Note the purples and reds in the Northeastern United States. Click the image for a color key.

The flooding was attributed to several weather factors that all came together over the region.

The primary factor was the stalling of the jet stream just to the west of the Appalachians. That, combined with the Bermuda high over the Atlantic Ocean, blocked any systems from moving inland or offshore. The influence of a tropical low (which nearly became a tropical storm but did not attain a full surface circulation) off the North Carolina coast allowed a constant stream of tropical moisture to enter the Mid-Atlantic region. The resulting heavy and prolonged rains overflowed the banks of many rivers, lakes, and streams, leading to the flooding.

A senior National Weather Service meteorologist declared that rain events of this size take place in the region only every 200 years.^[3]

[edit] Impact

Ranfall in the East June 23-29, 2006

[edit] Delaware

Considerable flooding occurred in much of Delaware, particularly in Sussex County, where Governor Ruth Ann Minner declared a state of emergency. The hardest hit community was Seaford, where 40 families are temporarily homeless and many homes and businesses were damaged.^[4]

[edit] District of Columbia

Significant street and river flooding was reported in Washington, D.C.. Several important federal buildings, including the National Archives and Records Administration, the Internal Revenue Service, the United States Department of Justice and some of the Smithsonian Institute buildings were closed.^[5]

Mayor Anthony A. Williams declared a state of emergency as a result of the flooding and the threat of power outages and other problems.^[6]

The White House elm tree pictured here fell over due to the intense rains.

The White House elm tree pictured on the reverse of the twenty-dollar bill (on the right side of the bill) was toppled by the rain-soaked ground that resulted from this storm.

[edit] Maryland

The most severe flooding took place in and around Montgomery County. Over 2,200 people had to be evacuated from the area south of Lake Needwood in Rockville due to concerns of a dam break there (the earthen dam was leaking). If the dam were to break, communities downstream could be under as much as 22 feet (7 m) of flood water.^[6] The dam did not break, however, and the evacuations ended on the evening of June 29. U.S. Highway 29 (Colesville Road) in Silver Spring and Maryland State Highway 198 near Fort Meade were among the dozens of roadways closed due to high water. Parts of Laurel in Prince George's County were also exacuated after a floodgates were opened to relieve pressure on a nearby dam.

In Frederick County, three people were killed when they attempted to cross the flood waters from Middle Creek. ^[7] Also in Frederick County, a 14-year-old boy and a 16-year-old boy drowned while swimming in a swollen creek that feeds into the Monocacy River. On July 4 in Prince George's County, the body of a 22-year-old man was recovered. It was determined that his car was swept off Route 29 by the floodwaters nearly two weeks prior. ^[8]

Damage reports are incomplete, but damage to roads and agriculture in the Eastern Shore region alone is estimated around $12 million.^[4]

On Friday, June 30, Maryland Governor Robert Ehrlich requested federal disaster aid for five Maryland counties: Caroline, Cecil, Dorchester, Harford, and Montgomery. However, Ehrlich stated in a letter requesting the aid to President George W. Bush that more counties could be included after damage assessments. Governor Ehrlich stated that damages in Maryland could exceed $10 million. Ehrlich has also requested, in addition to federal disaster aid, funds for "hazard mitigation assistance", which is federal money used to help governments rebuild antiquated structures with modern structures. Ehrlich is also seeking loans from the federal Small Business Administration to help private property owners, both residential and business, to rebuild or repair damaged buildings. ^[9]

[edit] New Jersey

The heaviest flooding in New Jersey was along and near the Delaware River, on the border with Pennsylvania. Over 1,000 people were evacuated from low-lying areas of Trenton, and some state government buildings were closed.

In addition, Trenton's water filtration system was shut down because of debris floating down the Delaware, and Mayor Doug Palmer called for conservation, saying the city had only about two days of drinkable water.

The river was expected to crest Friday at nearly 8 feet (2.5 m) over flood stage, the fourth-highest level on record for Trenton.^[5]

Governor Jon Corzine has declared a state of emergency for the entire state as a result of the flooding.^[10]

[edit] New York

Water from the Neversink River rushes over a road in Deerpark, New York

Significant flooding has taken place in the Southern Tier region, particularly around Binghamton. Riverside communities have already been flooded and evacuations continue in the region.^[11] In Broome County alone, over 5,000 people have been forced to evacuate, particularly in the submerged village of Conklin.^[2]

Two people were killed when a section of Interstate 88 washed away and two trucks drove into the chasm created.^[5]

In Port Jervis, the Delaware River flooded low areas of the city barely recovered from the record flooding of April 2005. The Neversink River also swelled, prompting officials to close the Neversink bridge. The Mid-Delaware Bridge (Carrying US 6 & 209) was also closed.

Governor George Pataki estimated that damage in the state could exceed $100 million.^[5]

[edit] Pennsylvania

US 6 & 209 flooded by the Delaware River at Westfall, PA

The worst flooding here took place in the Susquehanna River valley and its tributaries. Over 200,000 residents in northeastern Pennsylvania had been evacuated due to the rising floodwaters. Damage in Susquehanna County alone totaled to over $100 million (2006 USD).[1]

Extensive river flooding had been reported in dozens of communities in eastern Pennsylvania. Already, over 70 people had to be rescued from their rooftops by USCG helicopters after being stranded by the floodwaters.^[2]

The Wilkes-Barre flood protection levee was at 41 feet (12.4 m), which was about the record level reached in Hurricane Agnes and at which point catastrophic flooding takes place. Forecasts had the river cresting at above 39 feet (11.6 m), which exceeds any other event other than Agnes and leads to significant flooding in other communities with less protection.^[12] Luzerne County officials said the large evacuations were precautionary, as there was the potential for the area to be isolated if the most severe predictions took hold.

In Reading, flood stage is 13 feet (4 m), but the Schuylkill River was projected to crest at about 23 feet (7 m) there. That is the worst that area has seen since Hurricane Agnes.

In Easton, the Delaware River,crested 17 feet (5.2 m) above flood level. Riegelsville was 14 feet (4.2 m) above flood level. New Hope was be 8 feet (2.5 m) above flood level.

Philadelphia's Kelly Drive and West River Drive were closed.

The Knoebels amusement park in Elysburg was closed due to the flooding of local creeks and did not reopen until Friday afternoon. ^[13]

Manayunk issued a mandatory evacuation for the area between Main Street and Ridge and Levering. ^[14]

The Swatara Creek inundates the United Water Plant and the Duke Street Bridge in Hummelstown, Pennsylvania

Severe flooding of the Swatara Creek near Hershey and Hummelstown closed many roads in the area, and damaged a number of homes. The creek crested at 16.12 feet around 7am on June 29, breaking the previous official record of 15.37 feet, which was set September 27, 1975. However, this did not come close to the flooding after Hurricane Agnes, which caused the creek to crest at approximately 28 feet on June 23, 1972.

In Pike County, the Delaware River caused extensive damage to Matamoras Borough and Westfall Township. The Delaware crested in the early hours of 29 June at 32.16 feet at Milford (as per NOAA hydrograph ^[15]) The record level of the river at Milford is 35.5 feet and flood stage starts at 25 feet.

As of Friday, 30 June, US Highway 209 between Milford and the Monroe County line at Lehman Township was closed.

In Wayne County, the opening of the Lake Wallenpaupack spillway caused damage downstream.^[16] The Delaware river also caused damage on the eastern border of the county. Damage in Wayne County totaled to about $50 million (2006 USD).[2]

Of the 67 counties in Pennsylvania, 46 are under a state of emergency as declared by Governor Ed Rendell. Four deaths have been confirmed in Pennsylvania; two in Luzerne County, one near Gettysburg, and one in rural Wayne County.^[17]

In Lackawaxen, the Zane Grey museum, part of the Upper Delaware Scenic and Recreational River, sustained significant damage.^[18]

[edit] Virginia

Flooding occurred in many areas in Virginia, particularly in the north. Mudslides were also witnessed in the mountainous regions.^[19] A mudslide closed the Capital Beltway in Alexandria for several hours on Monday, June 26.

Governor Tim Kaine declared a state of emergency for the entire state of Virginia.

[edit] References

[edit] See also

• Floods in the United States

[edit] External links