There's nothing like being stuck in the middle of the Mississippi River while a pair of barges goes around you because your boat is dead in the water. I've heard the phrase in movies and in Deadliest Catch prior to hearing my boat captain utter it over the radio today, and it was just as scary and foreboding in person as it sounds on TV...
...and it was HOT. Really hot. Thankfully, after about an hour and a half, the calvary arrived (another boat captain/ERDC-CHL employee) with some fuel, some tools, and a new boat for us, just in case. So after some trial and error, we sent him home with the busted boat (after towing it in) and took off down the river in our new (working) ride.
We arrived at the chute where we'd GPS-located our desired sampling points, drove in a ways, then turned around and headed back out while taking water (eDNA) samples every 50m or so.
(Mississippi River main channel behind us)
(and now down into the chute)
We made a curious friend (who followed us to 3 different sampling points before turning back)
We took "grab" samples (2L bottles that I dipped below the surface of the water) and pumped sediment samples (water pumped up over marine cloth from the bottom of the chute, where black carp are more likely to hang out and deposit their DNA), and nobody fell overboard.
(Rick and Matt, two of my coworkers)