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📘 The brown water under the wing

The river you are crossing started as snowpack in the Sawatch and Mosquito ranges of Colorado, on the east side of the Continental Divide. It has already travelled across four states — Colorado, Kansas, Oklahoma, and now Arkansas — and it i

3
lessons
~15 min
to learn
Adults
level
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What you’ll learn

  1. From Rockies to plainsTrace headwaters, Royal Gorge, and the shift onto the Great Plains.The Arkansas changes character from mountain torrent to wide unreliable plains river.
  2. Plains water fightsFollow Santa Fe Trail use, irrigation losses, and interstate compacts.On the plains the channel is also a border, a trail, and a legal dispute.
  3. Navigation and mouthRead locks, Little Rock, Fort Smith, Arkansas Post, floods, and the Mississippi join.Managed pools and a canalized lower reach carry barges to the Mississippi confluence.

Questions this course answers

How long is the Arkansas River?

The course cites 1,469 miles as the sixth-longest U.S. river.

What navigation system opened on the Arkansas in 1971?

The McClellan–Kerr system opened in 1971 with locks and dams.

Where does the Arkansas meet the Mississippi?

The confluence is in Desha County near the vanished town of Napoleon.

Grounded in trusted sources

  • USGS Geographic Names Information System and National Hydrography Dataset (length, source, mouth)
  • U.S. Army Corps of Engineers, Tulsa District — McClellan-Kerr Arkansas River Navigation System
  • Kansas v. Colorado, U.S. Supreme Court; Arkansas River Compact (1949)
  • National Park Service — Arkansas Post National Memorial; Fort Smith National Historic Site
  • NASA ISS061-E-026278 (confluence photograph, 1 November 2019)

Every Wunder lesson is built from real, reputable sources — never invented.

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