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    The Impact of Contract Operations on Safety in Underground Coal Mines

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    Date Issued
    2016-09
    Publisher Version
    10.1097/JOM.0000000000000835
    Author(s)
    Buessing, Marric Grace
    Boden, Leslie
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    Permanent Link
    https://hdl.handle.net/2144/17892
    Citation (published version)
    Buessing, Marric, and Leslie I. Boden. "The impact of contract operations on safety in underground coal mines." Journal of Occupational and Environmental Medicine 58.9 (2016): 952-956.
    Abstract
    OBJECTIVE: The aim of this study was to test for differences in injury rates for contractor-operated underground coal mines relative to owner-operated mines in Kentucky, controlling for other covariates. METHODS: We used disparities between MSHA contractor data and surface reclamation permit data to identify mines operated by contractors. We then used negative binomial regression to estimate injury rates from 1999 to 2013, controlling for mine and controller characteristics available from MSHA and the Energy Information Administration (EIA). RESULTS: Contractor-operated mines with 15 or fewer full-time equivalent workers (FTEs) had a statistically significant 57% higher covariate-adjusted reported traumatic injury rate than similar mines without contract operators. Larger contractor-operated mines did not have a statistically significant elevated rate. CONCLUSIONS: We detected a significant elevation of traumatic injury rates only among the smallest contractor-operated mines. This increase appears substantial enough to warrant attention.
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