The text file "Piezometer_time_series.txt" contains recorded observations of water levels and temperature for 16 piezometers installed in four deconstruction lot pairs. Water levels are presented as depth below the ground surface and as altitude above the National Vertical Datum of 1988. Lot pairs consisted of a Legacy deconstruction lot and an adjacent Green program deconstruction lot. There are four piezometers in each Legacy-Green lot pair. Both Legacy and Green lots had a shallow (6 or 6.5 foot) piezometer installed within the footprint of the deconstructed structure on the lot (piezometer 1) . The Legacy lots also had two piezometers installed outside of the structure footprint and included one shallow (6 foot; Legacy site 1 piezometer 3; Legacy site 2 piezometer 2; Legacy site 3 piezometer 2; Legacy site 4 piezometer 2 ) and one deep (16 foot; Legacy site 1 piezometer 2; Legacy site 2 piezometer 3; Legacy site 3 piezometer 3; Legacy site 4 piezometer 3) piezometer. Water level and temperature data were collected between November 14, 2018 and September 17, 2020. Recorded water levels were checked against periodic tape-downs using an electric well tape and adjusted to tape readings, if necessary. The piezometer information is as follows: Piezometer Legacy1-1; (Latitude 38.67741, Longitude -90.26539); depth 6 feet Piezometer Legacy1-2; (Latitude 38.67749, Longitude -90.26558); depth 16 feet Piezometer Legacy1-3; (Latitude 38.67747, Longitude -90.26553); depth 6 feet Piezometer Green1-1; (Latitude 38.67747, Longitude -90.26553); depth 6 feet Piezometer Legacy2-1; (Latitude 38.6796, Longitude -90.27142); depth 6 feet Piezometer Legacy2-2; (Latitude 38.67942, Longitude -90.27151); depth 6.5 feet Piezometer Legacy2-3; (Latitude 38.67943, Longitude -90.27148); depth 16 feet Piezometer Green2-1; (Latitude 38.67962, Longitude -90.27151); depth 6 feet Piezometer Legacy3-1; (Latitude 38.69901, Longitude -90.25448); depth 6 feet Piezometer Legacy3-2; (Latitude 38.69913, Longitude -90.25454); depth 6 feet Piezometer Legacy3-3; (Latitude 38.69916, Longitude -90.2546); depth 16 feet Piezometer Green3-1; (Latitude 38.6991, Longitude -90.25433); depth 6 feet Piezometer Legacy4-1; (Latitude 38.69942, Longitude -90.25374); depth 6.5 feet Piezometer Legacy4-2; (Latitude 38.69951, Longitude -90.25378); depth 6.5 feet Piezometer Legacy4-3; (Latitude 38.69957, Longitude -90.25375); depth 16 feet Piezometer Green4-1; (Latitude 38.69936, Longitude -90.25388); depth 6 feet