November 27, 2007 By Chad Vander Veen
As many Texans are aware, the Lone Star State is a veritable treasure trove of history. Once possessed by American Indians, Texas would eventually come under the rule of Spain, followed by Mexico, then move toward independence and self-rule, finally being annexed by the United States in 1845. A mere 16 years later, however, the new state would secede from the Union to join the Confederacy in 1861. Following the end of the Civil War, Texas was again granted admittance to the Union in 1870.
From the Comanches and the Tonkawas to Sam Houston and General Santa Anna, Texas has been the site of a fascinating and diverse array of people and cultures. As such, strewn throughout the state are countless relics, artifacts and geographic sites of significant interest. As the state continues to grow and expand its infrastructure, it has taken a unique step to ensure that its past is not paved over by modern development.
Roads and highways are, of course, among the most common and most invasive part of any infrastructure, stretching well past city limits and out in the vast, untamed expanses that claim much of the American Southwest. The Texas Department of Transportation (TxDOT) knows this and wanted to find a way to preserve and protect the state's history as it continues to build badly needed roads. Thanks to an innovative mapping project called the Texas Historic Overlay, TxDOT can now easily pinpoint thousands of historically significant sites, allowing the agency to design highways that will have minimal impact.
What makes the Texas Historic Overlay project interesting is that it tackles a complicated problem in an innovative fashion. The problem is that, as one goes farther back through history, records are less accurate, less detailed and less common. So how is an agency like TxDOT supposed to find sites of historic significance before they start digging? The answer: maps, lots and lots of maps.
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