Honestly, archaeological mitigation should be mandatory across the city. There are areas nearly as old or older all over the place. For instance, I live a stone's throw from Gravesend, extant as a town founded by an Englishwoman (though at the time, under Dutch auspices) since the mid 17th century. And obviously there was a Lenape presence before that. If there has ever been any archaeological activity, resultant of a requirement to do so or not, I have never heard of it or seen proof of it.
Honestly, archaeological mitigation should be mandatory across the city. There are areas nearly as old or older all over the place. For instance, I live a stone's throw from Gravesend, extant as a town founded by an Englishwoman (though at the time, under Dutch auspices) since the mid 17th century. And obviously there was a Lenape presence before that. If there has ever been any archaeological activity, resultant of a requirement to do so or not, I have never heard of it or seen proof of it.