33 are contained within the cap 6 and provide a relatively tight seal around the top most pier 18 fig9 10 show an adapter subsystem 34 which receives the concentrically stacked pier column 4 and interfaces it with an existing concrete friction pier 60 made of concrete pier segments 60 supported by a rebar alignment retention pin 41 as shown in fig1 as shown in fig1 the adapter base 36 is aligned with the other structure of concrete pier segments 60 for the concentrically stacked pier column 4 to remain substantially vertically oriented thereby functioning at a designed level the adapter base 36 includes a receiver 38 for receiving the base of the bottom most pier in the pier column 4 similar to the tapered top portions 16 of the pier segments 14 fig1 14 show the lifting platform 8 which is primarily constructed from a front platform plate 42 and a rear platform plate 44 connected together via several mounting bolts 46 threaded into receivers 54 and washers 56 spaced between the front platform plate 42 and the rear platform plate 44 as shown in fig1 the front 42 and rear 44 platform plates include corresponding alignment joint inserts 48 and alignment joint recesses 50 to ensure the two plates are aligned properly a pier recess 52 is formed between the front 42 and rear 44 platform plates such that the lifting platform 8 can be installed around one of the concentrically stacked pier segments 14 as shown in fig1 jacks 9 are placed atop the lifting platform 8 once the platform is.