The phrase "a mighty river" is correct and usable in written English.
You can use it to describe a river that is large, powerful, or impressive in size or flow.
Example: "The Amazon is often referred to as a mighty river, flowing through the heart of the rainforest and supporting countless ecosystems."
Alternatives: "a powerful river" or "a grand river".
Fog drifting around a bridge and the silvery flash of a mighty river.
Glasgow has always been outward looking: a mighty river runs through it.
Like tributaries to a mighty river, side areas of the museum offer details and follow the development of the jeweler.
Mainly she chronicles Bolívar's military and political exploits, which makes for a mighty river, coursing through more than 600 pages, of too many names and battles.
The composer Julia Wolfe has a striking ability to channel three streams of American music — Appalachian vernacular, post-minimalist classical, and rock — into a mighty river.
From this point the Volga becomes a mighty river, which, save for a sharp loop at the Samara Bend, flows southwestward along the foot of the Volga Hills in the direction of Volgograd.
It is home to a once mighty river, the Zayanderud, or the River of Life, that cuts through the historic center like a clumsily rolled out carpet.
Based in Tymoshenko's hometown, Dnipropetrovsk - an industrially mighty river city southeast of Kiev - UESU was a trading company that sold Russian national gas in Ukraine.
Wofford is fond of quoting Ronald Reagan, who called the spirit of volunteer service a "deep and mighty river flowing through the history of our nation".
The national holiday enables an annual renewal of what Ronald Reagan called, "this American spirit of voluntary service... that flows like a deep and mighty river through the history of our nation".
President Reagan said, "Let us pledge to restore, in our time, the American spirit of voluntary service...a spirit that flows like a deep and mighty river through the history of our nation". President George H. W. Bush created the first Office of National Service and established Points of Light and The Commission on National and Community Service.
