Watershed 1 is overlain by a 25 x 25 meter slope-corrected grid (see W1 map), delineated on the ground by white PVC stakes at each grid corner. The grid was surveyed in the summer of 1996 in preparation for the calcium addition. Measurements began at the weir and corner stakes were first labeled with an X-Y coordinate system. Grid cells with more than 50 percent of their area lying outside the watershed boundary were not included and not staked. At the conclusion of the survey, the grid cells (or "plots") were numbered consecutively from the top left (west) of the watershed to the bottom. Each cell is now identified by a numbered aluminum tag on the NW corner stake, and in some cases the old coordinates are still visible in permanent marker written down the side of the stake.

The table below includes elevation data for each grid corner. Plot numbers designate the NW corner of a grid cell, so coordinates without a plot number are the corners of outer grid cells which do not define the NW corner of another cell.

Click here for a comma-delimited file with the data in this table.