| .hcr | HydroCAD Rainfall Curve Data File |
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| .xtm | Xtremsplit Data Fil/CmapTools Exported Topic Map |
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| .emrg2 | E-Merge 2.0 Data File |
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| .swk | StudyWorks Save File |
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| .scexcludb | Spring Cleaning Exclusions File |
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