Every flood and every drought since Glen Canyon Dam closed. Lake Powell has swung across 188 vertical feet — from a record low of 3519.92 ft to a record high of 3708.34 ft.
Monthly mean (line) with monthly min–max band. Dashed teal line = full pool (3700 ft).
Record high
3708.34 ft
1983-07-14
Record low
3519.92 ft
2023-04-13
Full pool
3700 ft
conservation pool
Daily record aggregated here to monthly min/mean/max. Lake level and streamflow from USGS (Glen Canyon Dam project data courtesy of the Bureau of Reclamation); reference elevations, capacity, and records from Reclamation; ramp minimums from NPS Glen Canyon NRA. Historical daily values are agency-reviewed; recent values are provisional.