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AmaTerra Environmental (formerly Ecological Communications Corporation [EComm]) conducted archeological National Register eligibility testing at Site 41DW277 in December 2009. The site is located in the proposed right-of-way (ROW) for a new bridge along US 183 over the Guadalupe River, DeWitt County, Texas. Site 41DW277 was documented in 2009 by James Abbott and Allen Bettis of the Texas Department of Transportation (TxDOT) and at the time of survey it was thought to be potentially eligible for listing on the National Register of Historic Places (NRHP) or as a State Archeological Landmark (SAL). Due to expected impacts resulting from the proposed bridge construction, testing was recommended to determine NRHP/SAL eligibility. TxDOT hired AmaTerra to complete the work under Texas Antiquities Permit 5460. Testing consisted of excavation of five gradall trenches and 32 test units. AmaTerra found that the site consists of three stratified prehistoric components extending from 1–2 meters in depth and ranging from 2,800 years to 5,200 years BP in age. Three features were documented and artifacts recovered included lithic debris and tools, mussel shell, snail shell, a small amount of bone, and some modern household debris (from the top levels of the units). Burned rock was observed and documented but not collected. An interim report was submitted in January 2010 recommending that the upper components of the site are not eligible for NRHP/SAL listing but that lowest and oldest component is eligible. However, the report also recommended that no further work was needed since the lowest component was not within the area of potential effect (APE) for the bridge replacement. The Texas Historical Commission concurred with this recommendation in February 2010. This report documents the results of the testing and analysis for Site 41DW277. Records and artifacts generated during this project will be curated at the Center for Archaeological Studies at Texas State University.

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Changing Lifeways along the Guadalupe Basin in South Texas: The Results of National Register Testing of a Stratified Multicomponent Prehistoric Site, 41DW277, DeWitt County, Texas