If you go to the database for ISICS click on the DeMoines Simulcast site. A page will show the individual simulcast sights. There is a description or address for each site and a abbreviation for the structure, Tank, Tower, Building or other tall structure. Below the map list the frequencies and the gps longitude and latitude coordinates for each site. You can copy the long/lat into google earth and look at the sight. Many times you can see the individual antennas and microwave dishes using the street view.
Here is a link to the page I was referencing.
FCC Callsign WPKQ759 (CITY OF WEST DES MOINES)
www.radioreference.com