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Fifty Years of the National Historic Preservation Act

In celebration of the 50th anniversary of the National Historic Preservation Act (NHPA) in 2016, the Heritage Documentation Programs reflect upon over eighty years of documentation while also honoring the cultural legacy of each state in the nation. In the tradition of capturing a "complete resume of the builder's art," HABS, HAER, and HALS have always endeavored to record both high-style and vernacular structures as well as the distinctive array of regionally and ethnically-derived building forms. Each state has its own particular characteristics and qualities, manifested in its built environment. These maps highlights just a small number of the vast and rich variety of building forms that together represent the architectural, industrial, and landscape heritage of the United States.

We encourage you to view our selections and to take a deeper look at the HABS/HAER/HALS Collection via the links to the Library of Congress website. There you can find records on over 44,000 sites and structures from across the country.

We will add an additional state to this map every week from November 2015 to November 2016 as part of the #50for50 social media campaign to celebrate historic preservation and the NHPA. Are these some of your favorite places? Or do you have other favorites that have been documented by HABS, HAER, or HALS? Please join the conversation on our Facebook page each week.

To use the map: Click on the image below to launch the map, then click on the tab at the top of the map to view each state's list. The map works best if you zoom out to view the full map before choosing a new state. After clicking on the state's tab, zoom in on the map to see more detail.

Explore the map

Screenshot of NHPA50 map showing the U.S. Virgin Islands

Here are the places we've added to the exhibit so far:

  • District of Columbia - 7 of 1,071 surveys
  • Alabama - 7 of 1,255 surveys
  • Alaska - 7 of 567 surveys
  • Arizona - 7 of 605 surveys
  • Arkansas - 6 of 175 surveys
  • California - 8 of 3,817 surveys
  • Colorado - 7 of 906 surveys
  • Connecticut - 6 of 661 surveys
  • Delaware - 6 of 393 surveys
  • Florida - 7 of 750 surveys
  • Georgia - 8 of 977 surveys
  • Hawaii - 7 of 905 surveys
  • Idaho - 7 of 379 surveys
  • Illinois - 7 of 964 surveys
  • Indiana - 6 of 483 surveys
  • Iowa - 6 of 485 surveys
  • Kansas - 8 of 228 surveys
  • Kentucky - 6 of 424 surveys
  • Louisiana - 8 of 681 surveys
  • Maine - 7 of 392 surveys
  • Maryland - 10 of 1,858 surveys
  • Massachusetts - 7 of 1,706 surveys
  • Michigan - 7 of 633 surveys
  • Minnesota - 7 of 572 surveys
  • National Park sites - 71 of 3,154 surveys
  • Mississippi - 8 of 354 surveys
  • Pacific Islands - 4 of 13 surveys
  • Missouri - 8 of 1,458 surveys
  • Montana - 9 of 509 surveys
  • Nebraska - 7 of 114 surveys
  • Nevada - 7 of 428 surveys
  • New Hamsphire - 7 of 281 surveys
  • New Jersey - 9 of 1,621 surveys
  • New Mexico: 8 of 327 surveys
  • New York: 8 of 2,212 surveys
  • North Carolina: 8 of 568 surveys
  • North Dakota: 7 of 135 surveys
  • Ohio: 8 of 906 surveys
  • Oklahoma: 7 of 147 surveys
  • Oregon: 8 of 523 surveys
  • Pennsylvania: 8 of 3,808 surveys
  • Rhode Island: 7 of 465 surveys
  • South Carolina: 8 of 1,167 surveys
  • South Dakota: 9 of 147 surveys
  • Tennessee: 8 of 420 surveys
  • Texas: 9 of 1,114 surveys
  • Utah: 8 of 674 surveys
  • Vermont: 8 of 150 surveys
  • Virginia: 9 of 2,080 surveys
  • Washington: 8 of 827 surveys
  • West Virginia: 8 of 509
  • Wisconsin: 9 of 784 surveys
  • Wyoming: 9 of 545 surveys
  • Puerto Rico: 7 of 169 surveys
  • U.S. Virgin Islands: 6 of 203 surveys