See more detail at USNO's webpage for this chart. (May be very slow.)
Local times are accurate only if the timezone for the Black Swamp Observatory clear sky chart is really UT-4.)Also, times, even on USNO's page, are accurate only if the latitude/longitude of the chart for Black Swamp Observatory is accurate. Check the road map.
Black Swamp Observatory Clear Sky Chart | All charts along totality | Charts Home