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 26.17.04 Construction 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. WATERWAY CONSTRUCTION DIVISION CONTACTS BY COUNTY
PROJECT ENGINEER
TELEPHONE
ADDRESS
Frederick County
Washington County, East of I-81
Wuhib Bayou
Allegany County
Garrett County
Washington County, West of I-81
Paul Busam
Prince Georges County
Imtiaz Choudhry
Carroll County
Howard County
Debra Correia
Harford County
Cecil County
Tamene Dilnesahu
Calvert County
Charles County
St. Mary’s County
Mohammad Ebrahimi
Anne Arundel County
Eastern Shore
Kelly Flint
Montgomery County
Hira Shrestha
Baltimore City
Baltimore County
Phatta Thapa

8. 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.