Last spring I accompanied David Hodsdon and Jack Holland on one of their regular monitoring sessions. Here are some pictures I took showing them going through their routine.

David and Jack arrive on site and drop anchor. After doing this for years, they’ve gotten pretty good anchoring (close to) the same spot.

Measuring the water depth to confirm their location.

Jack doing a secchi disk reading.

David’s turn with the secchi disk.

David using the YSI Pro20 digital dissolved oxygen meter.

A close up of the YSI Pro 20 digital dissolved oxygen meter display.

Jack doing the data recording.

David measures the wind speed, direction, and temperature.

37 years of secchi disk readings