Is the culvert you're referring to the one in this picture?
That is the culvert, but I think what you are misunderstanding is the types of dogs that were used in the search.
There was only one scent tracking dog used. This dog is given an article of the missing person, and attempts to follow the scent trail of that person. St Johns campus has extremely challenging factors to properly utilize these tracking dogs. That’s why only one of them has been referenced in the papers. The day 1 tracking dog was the most credible. This is the dog that lead it’s handler to the sidewalk of the culvert.
The other type of dog that was used, is a cadaver dog, or HRD tracking dogs. These dogs are trained to detect human remains on either land or water. All human remains smell exactly the same. They cannot search for the remains of a specific person. I can count at least 10 cadaver dogs that were used in this search. The picture posted shows one of such dogs.
So the tracking dog made it to the sidewalk on the culvert. The cadaver dogs indicated human remains in the actual water. 2 different dogs, looking for two different things.
As for the quote you keep repeating, it is considering the top of the culvert on the road as “leading officers to the lake”. You and I have both been there, Sas, and we both know that this location isn’t exactly the shoreline.
Hope this clears some thing up for you, Sas.