see two pics of the newly finished DC Water diversion structure under 1st & Channing NW

See this tweet and pic:

             

FirstStTunnel ‏@FirstStTunnel  1h1 hour ago

MT #BloomingdaleDC @dcwater This is the newly finished diversion structure directly under 1st St NW at Channing St. ”
3:43 PM - 15 Oct 2014

  

and another pic from DC Water:

@dcwater
A lot of rain is coming down but we're building some massive tunnels to mitigate flooding and keep our rivers clean
12:45 PM - 15 Oct 2014