B. Hargreaves, 2Dec06, 15:15pm

A SOLINST levelogger from Frank Pazzaglia's EPA-funded collection was installed via a disk rotor and chain behind the weir.  The unit is the one that had been used at site 1 of the Tannersville bog (it kept time the best of the three used there).  It was renamed for the Lehigh Campus Weir site and the clock was synched to internet time (EDT) and memory cleared.  Recording at 15m intervals.  A heavy (1" links?) steel chain ran through the secure shackle attached to both the levelogger and the nonsecure shackle attached to the brake rotor.  The two free ends of the chain passed through the padlock closing the steel box which now contains the barologger.  This was placed on top of the electrical outlet cover to keep it above the bottom of the enclosure where water and mud typically accumulate.

The logger was programmed to start at 3:00pm EDT.
The sensor was placed on the stream bottom behind the weir at 3:15pm EDT.
The barologger (similarly synched and renamed) was placed in the steel enclosure at this site at about 3:10pm.  It was programmed to start at 3:15pm EDT.

At this time the water level was determined with a steel meter stick placed so its thin edge intersected the flow with the end of it in the weir notch.  The level was about 4.75" (+/- 0.25").

The site elevation was determined from Topozone.com topo map to be about 680 ft, which converts to 207m.

During routine data collection both the stream logger and the barologger should be downloaded and restarted to clear memory and keep the clock synched to accurate (internet) Eastern Daylight time.  When restarting these units the delayed start option should be used and always set to start at the next quarter hour (remember--EDT).

The culvert tends to fill up with sediment at some times of year and should be shoveled out whenever the brake rotor is pulled out to download the level logger.  When returning the level logger to the weir the logger should be hanging freely in the center recessed area and the disc rotor should be pressed down in full contact with the bottom sediments.  The recessed location of the logger is important to minimize water currents that would otherwise cause artifacts in the measured pressure.