Aerial Foundation Park has 3 notable bridges, one is specific to the park while the other two used to see traffic and are now retired here. This cache should ideally take you across each one to learn its history.
Posted coordinates are for the 1st virtual stage. You will have to uncover some info about each bridge, each set of info will give you answers to the next stage. Info from all 3 is needed to find the final.
To find stage 2: what is the load limit of the bridge at stage 1? this will be A.
To find stage 3: what township road was the bridge at stage 2 originally constructed on? assign this to BCD
To find the final: Stop before crossing the stage 3 bridge and read its history, your answers are on the island. How many acres of land were acquired for the park? Subtract 200 from this and let that be EF.
Coordinates for each stage below.
Stage 2: N° 40 23.2A7' W° 082 29.907'
Stage 3: N° 40 23.BCD' W° 082 29.C25'
Final: N° 40 23.B(C*D-5))' W° 082 29.(A+1)EF'