Northeastern Indiana Geology

[eric1037]

Hey all,

I am putting together a proposal to do a geotechnical evaluation in Fremont, IN. This is located in the very northeastern corner of Indiana.

I have been doing some research and I have found that there is post-glacial soil deposits, most likely moranic deposits and glacial till. It seems like the drift thickness is about 200 feet.

What I would like to know is if there is any unusual geologic features in this area such as Karst, expansive soils, etc.

Does anyone have any info on this area?

Thanks in advance!

 

[PSlem]

Best source for a site specific question is the NRCB, Nat'l Resources Conservation Board. part of the Department of Agriculture. Down south they usually share an office with the county agent. They have soil survey maps for each county identifying what kinds of soil and where. Some state capitols have a map selling room where you can buy a map identifying rock types. I've only worked as far north as Indianapolis. Clean, runny sand at least 50' down. I tried to rent an air track and no one even knew what it was, so rock is probably not an issue.

 

[PSlem]

One other general note on rock. I've kept a Noritake diamond products brochure for 20 years as concrete is made with local rock and they had a map of the US showing where concrete aggregate was soft to very hard. So you know not to blindly bid rock sockets in southern AL or eastern PA.

 

[Ron]

Get a proposal from a local geotech and subcontract the service with your overview for your client. The client will appreciate it.

 

[Bobdog1]

PSlem,
I've looked on-line and can't seem to find a copy your brochure or map showing where concrete aggregate is soft to hard. Have you found a location of your map on-line? I would be interested.

Also the agency you referred to in your first post is the Natural Resources Conservation Service (NRCS), the progeny of the old Soil Conservation Service (SCS). In most states there should be a service center in each county.

 

[zennis]

For Indiana Geology try (Indiana Geological Survey):

http://igs.indiana.edu/geology/