🔍 Key Concepts

• Arkansas River mileages and how AHP (Ahead of Head of Passes) is measured • How to use the Inland River Chart Book / mileage tables to find distances between two points • Difference between statute miles and nautical miles on U.S. rivers

💭 Think About

• Identify the river mile marking at the new mouth of the White River and compare it to the mile marking given in the question (144.6 AHP) • Think about whether you should be adding or subtracting river miles when going from one location to another along the same river system • Consider if there are any cutoffs, canals, or alternate routes that could change the distance compared to the straight-line chart scale

✅ Before You Answer

• Verify the exact mile marker listed for the new mouth of the White River in the official river mileage tables or chart book • Confirm that you are working in river statute miles AHP, not nautical miles, when comparing to 144.6 AHP • Double-check whether the distance asked is upbound or downbound and how that affects whether you add or subtract the river mile values