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Coal Creek Longitudinal Survey <br />~~_ <br />c <br />0 <br />e <br />w <br /> <br />0 <br />-5 <br />-10 <br />-15 <br />-20 <br />-25 <br />-30 <br />-35 <br />-40 <br />-45 <br />T3 <br />T2 <br />T1 <br />T4 mining <br />mining <br /> <br />0 1000 2000 3000 4000 5000 6000 <br />Distance (m) <br />