Installation of Subsurface Drainage Piping in Compound A

These documents are: a form for assessment of action that would impact cultural resources in the Great House in Compound A at the Casa Grande Ruins National Monument and a document supporting the proposed action. The recommendation supports additional ground level drainage ports to be installed in selected rooms in various locations by removing historic and prehistoric wall fabric.本批文档包含两类文件：其一为针对将对卡萨格兰德废墟国家纪念地（Casa Grande Ruins National Monument）A区院落大屋内的文化资源造成影响的行动开展评估的评估表单，其二为支持该拟议行动的佐证文件。本次推荐方案拟在不同位置的选定房间内增设地面排水口，施工方式为移除历史及史前时期的墙体构筑体（wall fabric）。