Since it's a federally recognized Historic district/landmark, I would think that rebuilding will be subject to scrutiny. There's quite a bit of
law and policy around this.
On the other hand, since repairs and maintenance were ongoing in the Front Street area, it's hard to know
which historical version must be preserved and, of course, even historic districts have to meet local code (or be closed to occupancy).
It's my understanding that any plans for rebuilding the designated structures on Front Street have to be vetted by authorities in the Department of the Interior (who also can provide funding for reconstruction).
I am guessing that as they start to build in the historic area, they'll find artifacts of earlier eras. It has both land and water areas designated (so the wharves/harbor itself are historic). The Pioneer Hotel is specifically protected. The date at which it became protected is 1962 - so I would assume it needs to be restored in line with how it looked in 1962.
www.nps.gov
Fortunately, the style of Front Street is still very much alive and popular in new builds around the islands. The National Park Service oversees some of this and they are serious about it. So are local Hawaiian groups. When they built the flood channel protection around Kahoma Creek (which ended up helping to protect the area around Safeway from fire), they found 15 sets of ancient human remains. I think the finds started with finding simply tools from a later era, but of course, that brought the entire creek area under archaeological protection - because federal law on that is also very clear. Lahaina is additionally under Hawai'i's only state recognition program for historic and archaeological sites:
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The State of Hawai'i is serious about historic preservation and reports on all its historic sites annually. So, there are many layers of protection and, well, I can't imagine that they won't find at least artifacts as they dig out existing foundations and haul everything away.
It's this initial phase that truly boggles my mind. The University of Hawai'i is the entity legally responsible for archaeological research and preservation, so they'll be involved as well.
Many times, reconstruction of older buildings does not take place (King K's palace is just the footprint of it, marked and preserved in concrete). It was not a traditional Hawai'ian build, it was the first brick structure to be built on Maui/in the islands, IIRC and King Kamehameha had it built in Western style and it was not rebuilt (area was pretty thoroughly excavated by archaeologists, with some of the artifacts being in the nearby museum, now burned).
One reason there is little likelihood of high rises right in Lahaina Town is that the foundations would go deep and there would obviously be an archaeological record of habitation (and likely, other burials/human remains) found (and then all construction stops). Sticking to the original footprints of the buildings as they existed at the time of the fire, which supports two story construction, is not only historic preservation but possibly the only way forward given the protection of archaeological and human remains in both state and federal law.
The Pioneer Inn (dating from 1901) is still owned by the family who built it, is my understanding, and I would think it would be rebuilt as it was, as closely as it can be. I imagine Baldwin House will be rebuilt as it was, but all the wonderful history and artifacts inside are gone. Still, some of them can be reconstructed from the detailed archaeological study of them (the species of seashells in the Baldwin house museum could result in a new collection replicating the old one).
But first, the mourning and the terrible task of finding the still-missing people. I pray and believe that more of the 1000 still listed as missing will be found alive (communication in West Maui is still an issue). Many of the 2000 destroyed buildings will not have been insured to a level that permits of modern rebuilding, is my other fear.
I do think Hawai'i itself will rally to make it possible for the now homeless population of Lahaina to rebuild.
JMO.