🔍 Key Concepts

• Western Rivers mile markers (AHP – Above Head of Passes) and how facilities are listed by river mile • How to read and use the U.S. Coast Pilot / River Charts / Light Lists style facility tables • Distinguishing between industrial/port facilities and other types of installations along a riverbank

💭 Think About

• Look at which companies are most likely to operate grain elevators, terminals, or docks directly on a riverbank in a port area like Helena. • Consider which of these might have infrastructure nearby but not necessarily a "marine facility" (dock, terminal, or loading point) open to river traffic. • Think about how exam questions based on river charts usually present a list: several names actually appear on the chart, and one is an "odd one out" that does not.

✅ Before You Answer

• Verify in a current river chart or facility listing which company names actually appear between miles 658 and 665 AHP. • Check which entities normally own or run public port terminals versus private industrial facilities. • Confirm which option is more likely to be a pipeline or utility crossing rather than a dedicated marine docking/loading facility.