SP-12 Nature's Building Codes: Geology and Construction in Colorado Download Publication Details Handbook on the relationship of geology to construction, particularly single family or small multi-family units. Topics covered in this report include flooding, erosion/deposition, mud/debris flows, debris fans, groundwater, landslides, rock fall, snow avalanches, swelling/collapsing soils, subsidence, radioactivity, seismicity, and mineral resources. Includes homebuyer’s guide and geologic report guidelines for planners and the general public. 72 pages. 8 appendices. Digital PDF download. SP-12D Citations Shelton, David C., and Dick Prouty. “SP-12 Nature’s Building Codes - Geology and Construction in Colorado.” Geology and Construction. Special Publication. Denver, CO: Colorado Geological Survey, Department of Natural Resources, 1979. https://doi.org/10.58783/cgs.sp12.noze1077. CGS Publications. https://coloradogeologicalsurvey.org/publications/natures-building-codes-geology-construction-colorado/.