Bentonite Soil Colorado Map

Have you driven the section of e 470 just south of the dia exits where the road suddenly gets bumpy or highway 287 west of berthoud.

Bentonite soil colorado map. However front range colorado has seen significant issues with heaving soils under roads and structures. Colorado springs subsidence investigation. Geological survey reston virginia. When a soil.

To request surveys or to find web soil surveys contact the colorado state office of the natural resources conservation service nrcs. Printed soil survey reports were the main source of soils information from 1899 to 2005. How to live with them. Smectite bentonite montmorillonite beidellite vermiculite attapulgite nontronite illite and chlorite.

There are many areas throughout the front range of colorado with expansive bentonite soils. Are expandable soils unique to colorado or are they found in other states or regions. I remember riding motorcycles along mccaslin boulevard years ago just for the roller coaster effect produced by the heaving pavement. Most of these reports are county.

Geologic hazards land use laws and professional standards. There are also some sulfate salts that will expand with changes in temperature. Soils are composed of a variety of materials most of which do not expand in the presence of moisture. Geological survey mark d.

Geologic map of the denver west 30 x 60 quadrangle north central colorado by karl s. In the table below clicking on a survey area that is listed as current takes you to the web soil survey. World wide web. Department of the interior u s.

Scientific investigations map 3000. It s important to note how the original sites in the area were platted and graded to control surface and sub surface moisture flows and be observant of changes in the area. Historical and supplemental documents are available below. Why do these soils expand.

Elbert county index to detailed soil maps pdf 957 kb. All are unique but share certain characteristics as far as how they behavior. Geologic aspects soils and related foundation problems denver metropolitan area. Pamphlet to accompany.

These walls were sporadically used in the united states between the 1940 s and 1970 s after which their use became commonplace. Department of the interior dirk kempthorne secretary u s. Expansive soils soils that have bentonite in them can seriously compromise your home s foundation thus seriously jeopardizing its integrity. Many locations around the country have expandable clay soils.

The colorado geological survey suggests that 1 3 homes built in colorado sits on expansive. Colorado soil surveys and maps. Soil bentonite sb slurry walls are the most common type of slurry wall. A 57 38 el 1 2 au.

However a number of clay minerals are expansive. This heaving caused by the wetting of the bentonite clay soil can destroy improperly designed and constructed buildings. Published soil surveys for colorado. This has led to regional terms for clays such as bentonite georgia clay caliche and gumbo among others.

For this type of wall the permanent backfill is a blend of soil and bentonite clay that is placed in a high slump condition. Thousands of these walls have been constructed in a number of purposes. Depending upon the original site prep and mitigation measures a house may be standing for quite some time before this becomes an issue. Current official soil survey information is on the web soil survey.

To show you how big a problem this is in colorado check out this map from the colorado geological survey. The high slump backfill is placed through the slurry to serve as the final barrier wall. Elbert county soil survey manuscript 1966 pdf 47 3 mb elbert county general soil map pdf 1 1 mb. Local occurrences of expansive soils can be found in all of the soil categories shown on this map.

2008 about usgs products for product and ordering information. Bentonite soils and the colorado homeowner. Elbert county online surveys. Shroba bruce bryant and wayne r.

In some subdivisions the issues became apparent within the first year from construction. Expansive soil treatment methods in colorado.