Heaven Hill 27 Year Barrel Proof Small Batch Bourbon was produced at the Old Heaven Hill Springs Distillery before it was destroyed by a fire in 1996. As such, it is referred to as “pre-fire” Heaven Hill bourbon. The release is comprised of 41 barrels that were produced in 1989 and 1990. All but five of the barrels comprising this release were aged on the first and second floors of Heaven Hill’s rickhouses, where the conditions were such that the proof decreased over time. As a result, when all of the barrels were combined it resulted in an unusually low barrel proof of only 94.7. Less than 3,000 bottles were produced, which equates to evaporation loss of approximately 73% or more. This one-time release bourbon was made available to limited markets in the fall of 2018.