Rio Grande Streamflow Mystery: Solved?

In which we continue to ponder what's going on at Otowi Bridge

In one of last week’s dispatches, I asked: Why did the Rio Grande’s peak streamflows at the Otowi Bridge suddenly diminish beginning in about 1945?

Now, I’m not talking median flows or the total volume of water that passed under the bridge. I’m talking peak streamflows here, meaning the highest measured flow during a given water year (Oct. 1-Sept. 30). B…