|The Allendale Farm boundary increase and additional documentation is eligible for the National Register of Historic Places under Criteria A and C for its significance in Exploration/Settlement, Agriculture, and Architecture. Allendale maintains two original c. 1800 log buildings (Resources # 1 and #2), one attached to an 1858 brick Federal I-house (Resource #1); and two outbuildings, a c. 1880 servants quarters (Resource #6) and a c. 1950 tractor shed (Resource #5) that are all presently listed on the National Register of Historic Places (Allen House, 1978 -#78002619). The boundary increase seeks to add 310.42 acres to the National Register-listed 3.9 acres in order to include the larger agricultural landscape of Allendale Farm and twelve additional contributing resources. This updated nomination seeks to expand upon each area of significance, both through additional documentation and the boundary increase. The addition of considerable acreage and resources speaks to each of these areas of significance, but particularly to the agricultural significance. The boundary increase, as well as additional documentation, extends the overall period of significance to the fifty-year marker of 1963 to include important periods of agricultural development in the late-nineteenth century and early to mid-twentieth century. The additional documentation also expands the narrative during the Civil War and Reconstruction periods as it relates to Allendale Farm. As listed on the National Register in 1978, the period of significance is 1800-1899. The boundary increase and additional documentation seeks to adjust this period of significance to c.1800 to the fifty-year marker of 1963. Two original log structures are extant and the landscape and location along the bend in the river is indicative of the original settlement of the area. The farm also exhibits intact agricultural buildings and landscape features of the mid-twentieth century and displays the farm's role in progressive farming of the twentieth century, particularly the soil conservation movement.