In 1989, prior to the construction of the Power Station, an archaeological excavation was undertaken on part of the area where the Flag Fen Timber Alignment and associated metal-work had been identified. The current development site formed part of the area of the 1989 archaeological excavation and was in the vicinity of the junction between the Fengate field-system and the Flag Fen Post-Alignment. It was originally thought that all archaeological remains had been destroyed in 1990 after the excavations, with the removal of the silts and peats beneath the Power Station, thus removing the archaeological deposits. However, despite this being the case for the waterlogged deposits, the terrace gravels had been left relatively intact, with the madeground surface built directly on top of this level, keeping the archaeology relatively well-preserved. The excavation covered an area of 1146m² and revealed 2 ditches, 98 postholes (87 of which formed a large Late Bronze Age enclosure), 5 pits and an Early Bronze Age monument comprising of 126 stake holes forming concentric circles, with 5 internal posts and at its most complete side consisted of 4 circuits.