Reading Sanamia's Journal (4) found in Arcwind Point starts this mini excavation.
Walkthrough
Locate the unmarked Sunken Barrow in the eastern part of Lake Ilinalta, the activator for the excavation is underwater. Excavation takes 12 ingame hours, after which a door to Sargruunde will be accessible.
Location
Sunken Barrow
Quest Stages
Sanamia's Journals - Lake Ilinalta (DBM_JournalDungeon04QST) | |
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Stage | Journal Entry |
5 | I found one of Sanamia's journals which talks about a sunken ruin in Lake Ilinalta. I should see if I can find it.
Objective 5: Excavate the hidden chamber |
10 | I have cleared the rubble blocking the doorway of the ruins at the bottom of Lake Ilinalta. Whatever is inside has likely not been seen or touched in ages. |