Mod:Fallout: The Frontier/The Bridge on the River Willamite

The Bridge on the River Willamete [sic] is the second main quest in the Northern Legion quest line.

Quick walkthrough

 * Retrieve your items
 * Talk to Callidus
 * Head to Outpost Henderson and deal with the NCR there, through combat or persuasion
 * Fight a mysterious robot or shut it down with a Science 90 check
 * Talk to the messenger and return to Legate Valerius

Detailed walkthrough
Having completed I Am Legion, Legate Valerius will tell the player to report to Callidus for further instructions. While in Valerius' office, the player can retrieve their items from the "Item Box" crate under Valerius' side-desk.

Callidus will ask the player to head to Outpost Henderson and deal with the NCR stationed there. There are three NCR Soldiers and one ranger. They can be killed or spoken to. If speaking to the ranger, Ian Malcolm, the player can convince them to leave through the following means:
 * Speech 80
 * Repair 60
 * The Terrifying Presence perk

After the task is completed, exit the outpost and the player will be confronted by a mysterious robot. The robot will inevitably turn hostile unless a Science check is passed to automatically shut it down, skipping the fight. Once the robot is down, a messenger will show up and ask the player to report back to the Legate; return to Ostia and do so to complete the quest.

Rewards

 * 650 XP
 * Positive Northern Legion reputation