WHY IS A FLOODPLAIN STUDY NECESSARY?

The purpose of a floodplain study is to establish the 100-year floodplain limits within or near a development so as to preserve the natural resources within the 100-year floodplain, to protect property and persons, and to apply a unified, comprehensive approach to floodplain management.

WHEN DO I NEED A FLOODPLAIN STUDY?

A study is required for any subdivision activity in Montgomery County that includes or is close to a drainageway having a drainage area of 30 acres or greater.

HOW DO I ESTABLISH THE 100-YEAR FLOODPLAIN?

The 100-year floodplain can be established using the following:

1. Detailed floodplain - MNCPPC floodplain maps; FEMA FIRM maps, or Flood Boundary and flood way Maps; and DPS approved engineered floodplain studies.



2. Approximate floodplain - Floodplain areas in the County where a detailed study has not been performed, but where a 100-year floodplain boundary has been approximated.



3. Unstudied area - Areas not identified in item #1 or #2.

For developments where floodplain limits fall under items #2 and #3, an Engineered Floodplain Study will be required as part of the development plan approval.

WHAT IS THE APPLICATION APPROVAL PROCESS?

Submit a completed Floodplain District Permit (FPDP) Application with review fee, a development plan, and any supporting technical information. Please refer to the second page of the FPDP application for submittal requirements.

WHAT WILL THE FLOODPLAIN STUDY REVIEW COST?

The fee for review and approval of the floodplain study is ............................. $2,288.00

Review & approval of dam-breach using TR-60-Q is .................................... $803.00

Review & approval of all other dam-breach analyses is ............................... $2,288.00

The above costs include the 10% Automation Enhancement Fee.

WHEN WILL I RECEIVE MY FLOODPLAIN STUDY APPROVAL?

An engineered floodplain study takes approximately six to eight weeks for review and approval. Actual processing time may vary according to workload and/or complexity of the project.

WHAT NEXT?

Upon the approval of the floodplain study, the applicant can apply for a Floodplain District Permit if the development proposes to construct within the 100-year floodplain. All approved floodplain limits must be shown on the subdivision record plat prior to recordation.