Wrong. The police were not focussed on any quarry until Renier's reading. For all they knew, Norman Lewis would not be found within 100 miles of a quarry. However, as Gary Posner noted in his article:
"Following Renier's reading, did the police zero-in on one quarry to which Noreen's directions pointed? Hewitt says on Sightings that he 'walked around probably 30 quarries' before deciding that the Whitehurst pit most closely matched the totality of Renier's clues. Perhaps that was his reason for having the Navy divers scour that one pit, which did result in Lewis' body and truck being recovered. But his initial rationale for concentrating on the Whitehurst pit was described this way in his report filed six days after Renier's reading: '. . . the Whitehurst pits are an obvious first impression . . . being the closest and the most accessible from the Lewis residence.' (Although the 'eastern' pit was fenced off by this time, it had been easily accessible when Lewis disappeared, and it is half as far from Lewis' home as is Whitehurst.)
"As for this 'eastern' pit, a person with some inside knowledge of the police investigation (who allowed me to tape our conversation but requests anonymity) told me that this had been the 'prime target for the investigation' immediately following Renier's reading. 'They didn't think there was a [railroad] track [at Whitehurst].'"
So, Renier's reading narrowed the focus from "anywhere" to "a group of quarries". Apparently most of the police thought her reading was more consistent with the eastern pit, but Hewitt correctly discerned that it was more consistent with the Whitehurst Pit.