Home›Hydroelectric Dam Project›Completion Era›By DecadeBrowse ByBy DecadeFactsCompletion EraSourcesComments (0)Reader Challenges (0)FactsComparisonEra of EmergenceWell-attested1931 1Completion Era1930sCompletion Era1 entry1970sCompletion Era2 entries1990sCompletion Era1 entry2010sCompletion Era2 entriesSources1. Hoover Dam - Wikipediatier 2WikipediaConstruction, Six Companies Inc. 1931 startQuote, Construction, Six Companies Inc. 1931 startThe winning bid to build the dam was submitted by a consortium named Six Companies, Inc., which began construction in early 1931.View the SourceComments (0)No comments yet. Be the first to share a thought.Sign in to join the discussion.Reader Challenges (0)No disputes yet. Spotted an error or a better source? Open the first one.Sign in to dispute this or suggest a correction.