🔍 Key Concepts

• AHP (Above Head of Passes) river mile system on the Lower Mississippi River • How utility crossings and pipelines are listed on official river charts and in publications (e.g., Corps of Engineers river charts, USCG Light List/Local Notices) • Matching exact mile markers to the named company/structure

💭 Think About

• What does AHP tell you about which river and chart system you should be looking at? • If you had the Corps of Engineers river chart open at mile 529.7 AHP, what information would be shown for a utility or pipeline crossing (company name, type of line, bank, etc.)? • How can you eliminate choices by thinking about how many different companies have crossings in that same mile range and whether some appear more than once nearby?

✅ Before You Answer

• Verify the river segment (which river and which reach) covered by mile 529.7 AHP before matching any company name • Check that the mile number and company name correspond exactly as listed in the official chart or reference—do not rely on memory alone • Confirm that the entry you select is specifically a utility/pipeline crossing at 529.7 AHP, not at a nearby mile (e.g., 528.x or 530.x)