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MSHA mine register by county

Mines in Calhoun County, Iowa

Calhoun County, Iowa has 5 mines on MSHA's register: 2 intermittent, 3 abandoned. 2 accidents have been reported at these mines between 2012 and 2018. Inspectors have issued 141 citations.

Every mine MSHA has registered in Calhoun County, working or not, with the accident, fatality and citation record each one carries on this site. Active mines are listed first, then the rest by the weight of their record.

Abandoned and historical mine features in Calhoun County →

Mines on register
5
Active
0
Fatalities on record
0
Citations issued
141
0 underground · 5 surface · 0 facilities 0 coal · 5 metal and non-metal 2 intermittent 3 abandoned 2 reported accidents, 2012–2018
Local economic context
ⓘ County figures come from the US Census Bureau's American Community Survey, 5-year pooled estimates, so the 2023 vintage covers 2019 through 2023. The Census category is 'mining, quarrying, and oil and gas extraction', which is broader than MSHA jurisdiction and includes oil and gas workers no mine employs. These figures describe the surrounding county, not this mine, and are not a factor in any specific incident.
Calhoun County, Iowa · Population 9,858
0.1%
Mining share of county employment
$66,875
Median household income
Source: US Census Bureau, American Community Survey 2023 5-year estimates.
On the map 
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MSHA-registered mine, any status

Mines plot only where MSHA holds a surveyed coordinate for the site; mines the agency locates to a town, county or state centroid are in the counts and the list above but not drawn. Click a point for the mine's status and record.

Operators with the most mines herecurrent operator of record
Operator Mines Active Fatalities
Mohr Sand, Gravel & Construction L.L.C. 2 0 0
Calhoun County Highway Department 1 0 0
Tiefenthaler Ag Lime Inc. 1 0 0
Weaver Construction Company 1 0 0
Mines in Calhoun County5 on register
  1. Mohr Sand & Gravel PWP #1
    Surface metal/non-metal · Mohr Sand, Gravel & Construction L.L.C. · MSHA ID 1302408
    Intermittent
  2. Mohr Sand & Gravel PCP #1
    Surface metal/non-metal · Mohr Sand Gravel & Construction LLC · MSHA ID 1302475
    Intermittent
  3. Portable Sand Plant #2
    Surface metal/non-metal · Tiefenthaler Ag Lime Inc. · MSHA ID 1302191
    Abandoned
  4. Otto Pit
    Surface metal/non-metal · Weaver Construction Company · MSHA ID 1301974
    Abandoned
  5. Packer Pit
    Surface metal/non-metal · Calhoun County Highway Department · MSHA ID 1301729
    Abandoned

Status, type and operator are as reported to MSHA. Fatality and accident counts are MSHA's reportable accident records for the mine; citations are inspector-issued violations on record. Each mine's own page carries the full detail.

Other counties in IowaAll counties →
How to read these numbers

The register is MSHA's Mine Data Retrieval System: every operation ever assigned a mine ID, including ones abandoned decades ago, so the count is a history of mining in the county, not a count of working mines. A mine's county is the one its operator reported to MSHA. Fatality and accident counts start with MSHA's reportable-accident records (1983 onward); citation counts are inspector-issued violations on record. We are an independent research tool, not MSHA.