The Monongahela River (also known locally as the Mon)
is a river on the Allegheny Plateau in North-Central West Virginia and
south western Pennsylvania in the United States. At Pittsburgh, it meets
the Allegheny River to form the Ohio River.
do you know about the Monongahela River? Explore the Quick US Geography
Rivers and Streams Quiz. "Check Your Answers" at the end of
1. The West Fork River and Tygart Valley River form the Monongahela
River in Fairmont, West Virginia. What is the elevation?
- 763 feet
- 863 feet
- 963 feet
2. How long is the Monongahela River?
- 28 miles
- 128 miles
- 228 miles
3. One of the major Monongahela tributaries is the Cheat River. Where
does it flow into the Monongahela River?
- Morgantown, West Virginia
- Point Marion, Pennsylvania
- Masontown, Pennsylvania
4. What major tributary flows into the Monongahela at McKeesport,
- Marvin River
- Youghiogheny River
- Washington River
5. In 1817, the Pennsylvania legislature authorized the Monongahela
Navigation Company to build 16 dams with bypass locks to create a river
transportation system between Pittsburgh and West Virginia. Originally
planned to run as far south as the Cheat River, the system was extended
to Fairmont, and bituminous coal from West Virginia was the chief
product transported downstream.
6. In 2006, the navigation system, operated by the U.S. Corps of
Engineers, had dam-locks along the waterway. How many dam-longs on the
7. Briefly linked to the Monongahela Navigation was the Youghiogheny
Navigation, a slack water system of 18.5 miles between McKeesport and
West Newton. It had two dam-locks overcoming a change in elevation of
about 27 feet. Opening in 1850, it was destroyed by a flood. When was it
destroyed by the flood?
8. The Monongahela was the site of a famous airplane crash that has
become the subject of numerous urban legends and conspiracy theories.
Early in the morning of January 31, 1956, a B-25 bomber en route from
Nellis Air Force Base in Nevada to Olmstead Air Force Base in
Pennsylvania crashed into the river near the Glenwood Bridge in
Homestead, Pennsylvania. All six crewmen survived the crash but two
later succumbed to exposure and drowned. Despite the relative
shallowness of the water, the aircraft was never recovered.
9. The Monongahela is uncommon as one of the few major navigable
rivers in the world that flows north.
10. The mouth of the Monongahela River is at Pittsburgh, Pennsylvania
where it flows into the Ohio River. What is the elevation at the Three
- 609 feet
- 709 feet
- 809 feet