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Maryland Water Management: Hydrologic & Hydraulic Analysis

Get assistance with hydrologic and hydraulic analysis for wetlands and waterways in Maryland. Ensure compliance with COMAR regulations and assess the impact of proposed changes on flooding and stability. Pre-application meetings and guidance provided.

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Maryland Water Management: Hydrologic & Hydraulic Analysis

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  1. Maryland Department of the Environment Water Management Administration Wetlands and Waterways Program

  2. Hydrologic & Hydraulic Analysis • Hydrology – amount of water, minimum 2-, 10- and 100-year storms. (ultimate development). • Hydraulics – how the water moves. Compare existing to proposed conditions. • Methods used must be in the public domain and verifiable.

  3. COMAR 26.17.04Construction on Nontidal Waters and Floodplains • H&H analysis required for changes to the course, current or cross-section of waters of the State (unless waived). • Waters of the State includes the 100-year floodplain for all regulated streams. • Stream restorations – analysis needed for proper design.

  4. H&H Analysis used for: • Increased risk of flooding to others from any analyzed storm (.10’). • Any area, not owned by the applicant, subjected to flooding increases must be purchased, placed in a designated flood easement, or addressed by other means. • “other means” is typically affected property owner sign off.

  5. H&H Analysis used for: • Assure stability through sheer stress comparison of the project reach and immediately U/S and D/S (10%). • Withstand flood forces. • Changes to mapped FEMA floodplain.

  6. How we can help: • Pre-application meetings. • Guidance on whether H&H will be required. • Contacts:

  7. How you can help: • Plan on providing H&H (money and time). • Provide all data: input, output, summary tables. • Provide an engineering narrative with assumptions used and conclusions reached.

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