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MSHA mine register by county

Mines in Hamilton County, Iowa

Hamilton County, Iowa has 10 mines on MSHA's register: 1 intermittent, 9 abandoned. 2 accidents have been reported at these mines between 2009 and 2012. Inspectors have issued 41 citations.

Every mine MSHA has registered in Hamilton 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 Hamilton County →

Mines on register
10
Active
0
Fatalities on record
0
Citations issued
41
1 underground · 8 surface · 1 facilities 0 coal · 10 metal and non-metal 1 intermittent 9 abandoned 2 reported accidents, 2009–2012
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.
Hamilton County, Iowa · Population 14,893
0.1%
Mining share of county employment
$71,750
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
Weaver Construction Company 5 0 0
Stratford Gravel, Inc. 4 0 0
Martin Marietta Aggregates 1 0 0
Mines in Hamilton County10 on register
  1. Stratford Shop
    Facility metal/non-metal · Stratford Gravel, Inc. · MSHA ID 1302341
    Abandoned
  2. Portable Screening/Washplant #2
    Surface metal/non-metal · Stratford Gravel, Inc. · MSHA ID 1302457
    Abandoned
  3. Portable Plant #3
    Surface metal/non-metal · Stratford Gravel, Inc. · MSHA ID 1302460
    Intermittent
  4. Ahart Pit
    Surface metal/non-metal · Weaver Construction Company · MSHA ID 1301516
    Abandoned
  5. Forrester Pit
    Surface metal/non-metal · Weaver Construction Company · MSHA ID 1301168
    Abandoned
  6. Grandgeorge Pit
    Surface metal/non-metal · Weaver Construction Company · MSHA ID 1301847
    Abandoned
  7. Moberly Mine
    Underground metal/non-metal · Martin Marietta Aggregates · MSHA ID 1300862
    Abandoned
  8. Mortveidt Pit
    Surface metal/non-metal · Weaver Construction Company · MSHA ID 1301848
    Abandoned
  9. Portable Screening/Washplant #3
    Surface metal/non-metal · Stratford Gravel, Inc · MSHA ID 1302476
    Abandoned
  10. Webster City Yard And Shop
    Surface metal/non-metal · Weaver Construction Company · MSHA ID 1301178
    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.