Maryland Department of the Environment Water Management Administration Wetlands and Waterways...
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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.
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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.
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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.
H&H Analysis used for:
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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.
H&H Analysis used for:
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How we can help:
Pre-application meetings.
Guidance on whether H&H will be required.
Contacts:
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WATERWAY CONSTRUCTION DIVISION CONTACTS BY COUNTY
COUNTY PROJECT ENGINEER TELEPHONE EMAIL ADDRESS
Frederick CountyWashington County, East of I-81 Wuhib Bayou 410-537-3605 [email protected]
Allegany CountyGarrett CountyWashington County, West of I-81
Paul Busam 410-537-3213 [email protected]
Prince Georges County Imtiaz Choudhry 410-537-3813 [email protected]
Carroll CountyHoward County Debra Correia 410-537-3900 [email protected]
Harford CountyCecil County Tamene Dilnesahu 410-537-3803 [email protected]
Calvert CountyCharles CountySt. Mary’s County
Mohammad Ebrahimi 410-537-3816 [email protected]
Anne Arundel CountyEastern Shore Kelly Flint 410-537-3536 [email protected]
Montgomery County Hira Shrestha 410-537-4247 [email protected]
Baltimore CityBaltimore County Phatta Thapa 410-537-3641 [email protected]
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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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