Bridges & Structures

Manual for Abandoned Underground Mine Inventory and Risk Assessment
Pre-Inspection Checklist Form

Pre-Inspection Checklist

1) Abandoned Underground Mine Map Series (U.S.G.S. Based) - Obtain from ODNR. DGS and review.

2) Individual Underground Mine Abandonment Map and associated Data Form from ODNR, DGS - Obtain and Review

3) Roadway and Right of Way Plans - Review

4) Subsurface Investigation

5 Centerline Survey Plat - to help locate mine map (section lines, property lines, etc.)

6) ODNR Historic Information Regarding Subsidence Events - review for events near site

7) OSM Historic Information Regarding Subsidence Events - review for events near site

8) OMSIUA Historic Information Regarding Subsidence Events - review for events near site

9) Abandoned Underground Mine Inventory Field Data Sheets From Counties - review for reports near site

10) County Maintenance Records - review for unusual grade and drainage conditions/maintenance near site

11) Measured Geologic Sections - Obtain from ODNR, DGS and Review

12) Geologic Structure Maps - Obtain from ODNR, DGS and Review

B. Compile Overlay:

1) Scale Adjustment - use plan scale and modify mine map (if necessary) to fit

2) Manually produce composite plan view by overlaying mine map on roadway drawings.

C. Notify County Manager:

1) Inform of intent to visit site and invite to participate in site visit

2) Ask about any known records of unusual maintenance or construction at site.

D. Equipment:

shovel permanent marker DMI equipment

tape hammer measuring wheel

camera rock hammer climbing rope

notebook - with grid paper machete binoculars for sketching

locking hand level folding rule clipboard

altimeter (+/- 5 ft.) level rod, telescoping calculator

soil probe sounding rope (cord with scale weight)

mirror hiking compass straight edge

flashlight spray paint protractor

survey lath safety strobe light for vehicle

handheld GPS unit