Energy Lab Bonus Mystery Cache

A Bonus Cache associated with the "Energy along the Cannon 1850--2050" ALC (Adventure Lab Cache). 

What you need to know: All the information required to locate the cache can be extracted from the five answers in the ALC. In particular, at location

1.  There were D letters in the name of the company.
2.  The year carved in stone was  18EH.
3. The dry year was 18IF.
4. There were J letters in the name of the garden.
5. The goal year is 2CB5

The cache is at N 4A° BC.HDJ'  W FG° HI.BEF'. Although the last location is closed after sunset the cache should still be available nearby.

More than you need to know: As the space is limited on each page of an ALC, the primary references used are provided here.

In their own words: