Looking closer…
Move through the dated record of Glen Canyon Dam, separating what is documented, what is visible today and what still needs archival evidence.
The dam is named for Glen Canyon, a series of deep sandstone gorges now flooded by the reservoir; Lake Powell is named for John Wesley Powell, who in 1869 led the first expedition to traverse the Colorado River's Grand Canyon by boat.
Aha will show a draggable historical comparison here only when a sourced archival image and a sourced current view are available. Until then, the dated record stays textual and verifiable.
Maps reveal position. Satellite imagery reveals the present landscape. Historical imagery is labeled separately because coverage varies.
Start with the source record behind this Aha.
Inspect evidence ↗mapPut the historical sequence back into its modern geography.
Inspect evidence ↗satelliteInspect the present landscape in Google Earth. Historical imagery availability varies by location and date.
Inspect evidence ↗mediaGlen Canyon Dam MC.jpg · CC BY 2.5
Inspect evidence ↗mediaA bend in Glen Canyon of the Colorado River, Grand Canyon, ca.1898 (CHS-4708).jpg · Public domain
Inspect evidence ↗mediaAerial view of the Glen Canyon Dam, 1965, US Bureau of Reclamation.jpg · Public domain
Inspect evidence ↗mediaArizona, Lake Powell 01.jpg · CC BY-SA 3.0 pl
Inspect evidence ↗Aha distinguishes dated historical records, reusable archival media, present-day maps and satellite context. A historical image is never labeled as ‘Then’ unless a source is attached.