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Contact DPIE Site/Road Plan Review Division at 301-636-2060 and ask to speak with the floodplain engineer. Submit the "Floodplain Information Request Form" and the required fee. Approximate floodplain limits are shown on www.PGATLAS.com. Click on layers and choose "Environmental." Then click all 3 floodplain layers. Warning: These floodplain layers are approximate in nature and subject to change. Potential land buyers and existing landowners should hire a civil engineer to confirm exact floodplain limits on properties.