Mahoning River

Mahoning River
File:2003-Mahoning-flood-9.jpg Mahoning river in Warren, Ohio
Origin	Columbiana County, Ohio
Mouth	Beaver River
Basin countries	United States
Length	182 km (113 mi)
Source elevation	367 m (1,204 ft) above sea level
Mouth elevation	232 m (761 ft) above sea level
Avg. discharge	54 m3/s (1,900 cu ft/s)
Basin area	2,932 km2 (1,132 sq mi)

The Mahoning River is a river located in eastern Ohio and western Pennsylvania. It joins the Shenango River to form the Beaver River and is part of the Ohio River watershed.

Physical properties

File:USACE Berlin Lake and Dam.jpg

Berlin Lake and Dam on the Mahoning River in Mahoning and Portage Counties. View is upriver to the south-southwest.

File:USACE Berlin Dam Mahoning River.jpg

The Mahoning River below Berlin Lake and Dam in Mahoning and Portage Counties. Lake Milton can be seen in the far distance to the north-northeast.

It is formed near Winona in Columbiana County, Ohio, and extends for a length of approximately 113 miles (182 km) with a watershed area of approximately 1,132 square miles (2,932 km²). It joins the Shenango River near New Castle, Pennsylvania to form the Beaver River. The river traverses five Ohio counties, Columbiana, Stark, Portage, Trumbull, and Mahoning, and as well as Lawrence County, Pennsylvania. The watershed area also includes parts of Ashtabula and Geauga Counties in Ohio.

The three main tributaries are Mosquito Creek, West Branch, and Eagle Creek, all in Ohio. There are 15 dams on the river course. The river has a course of 97.1 miles (156.3 km) in Ohio with the remainder in Pennsylvania.

The river supports over 72 species of fish and 15 species of freshwater mussels.

The river is roughly divided into two sections. The “upper elevation” extends roughly from Winona to Leavittsburg and is generally rural in nature. The mainstem (lower elevation) extends roughly from Leavittsburg to the river’s mouth near New Castle, Pennsylvania and is heavily populated and is heavily industrialized. The mainstem area has a population of over 500,000 and has a long history of steel making, coke production, and other industries.

Environmental concerns

The industrial nature of the mainstem area has caused considerable pollution in the river. Much of the pollution has left the ecosystem via the natural river flow, but it is estimated that 750,000 cubic yards (573,416 m³) of river bed and shoreline sediment over a 30 mile (48.2 km) stretch of the mainstem from Leavittsburg to the Pennsylvania border is so heavily polluted that it will need to be remediated. Approximately 45% of this material is located in the vicinity of the Girard Dam near Girard, Ohio which has acted as a trap for much of the contaminated sediment.

Petroleum hydrocarbons, benzo(a)pyrene (polycyclic aromatic hydrocarbons), and mercury have all been found in quantities several times the maximum safe levels. Since 1988, the Ohio Department of Health has maintained an advisory against swimming or wading in the river between Leavittsburg and the Pennsylvania border and advises against eating fish caught there. The Corps of Engineers estimates that the remediation will take up to 15 years to complete and cost in excess of US$100 million. If approved, the dredging project will probably begin in the late 2010s.

Cities and towns along its course include:

• Winona, Ohio
• Alliance, Ohio
• Sebring, Ohio
• Newton Falls, Ohio
• Leavittsburg, Ohio
• Warren, Ohio
• Niles, Ohio
• McDonald, Ohio
• Girard, Ohio
• Youngstown, Ohio
• Campbell, Ohio
• Struthers, Ohio
• Lowellville, Ohio
• Poland, Ohio
• New Castle, Pennsylvania

Floods

The Mahoning river is susceptible to frequent flooding during high rain events. One such event started when 3 days of torrential rain fell in July 2003 which caused the river to change its course in Leavittsburg, Ohio destroying almost a hundred homes.

Here is a pictorial of some of the flooded areas.

	July 2003 flood
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Packard Park lower section	Packard Park ball diamonds flooded	Packard Park crosswalk
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Packard Park seagulls escaping the flood	Summit Street bridge almost overrun	Summit Street old power plant dam engulfed
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Summit Street closeup of dam engulfed	Riverwalk to nowhere

See also

• List of rivers of Ohio
• List of rivers of Pennsylvania
• Mahoning Valley

External links

• Mahoning River Watershed Project
• Mahoning River Consortium