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Model and Map Management (M3) System
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The Harris County Flood Control District’s Model and Map Management (M3) System is a web interface that allows
registered users to request the final FEMA effective models and supporting data that were released on
June 18, 2007. The Flood Control District entered into an agreement with FEMA that allows the District to distribute the
FEMA effective models and supporting data for Harris County. All model requests within Harris County must be
processed through the M3 system. To check out a model within the M3 system, the user must identify the purpose of
model check-out, select a desired study area, select the appropriate models and supporting data for that area and
generate a request for the retrieval and delivery of the models and data. The user will be able to find all
models in a project area. The M3 system will notify users of any model updates or future changes, and users will
be sent a CD or DVD depending on the size of the data requested.
Notice
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The hydrologic (HEC-HMS) and hydraulic (HEC-RAS) models on the DVD titled
"FEMA Revised Preliminary Flood Insurance Rate Maps"
are no longer valid,
and all final models are available through the M3 system. The floodplains, water surface elevations and flows have not changed.
However, the models names and internal data have been renamed to follow the District’s
Modeling Standards. |
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All engineering submittals must follow the " Transition Plan" for transitioning their projects for District
review from the preliminary models to the final models. After November 1, 2007 all engineering submittals must
use the final models. |
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The official model software versions are HEC-HMS 3.1.0
and HEC-RAS 3.0.1. The use of different software
versions must be pre-approved by the Harris County Flood Control District. |
Downloads
 FEMA Modeled Streams (PDF, 985 KB, 06/18/2007)
HCFCD Modeling Standards (PDF, 334 KB, 01/03/2008)
Transition Plan (PDF, 168 KB, 07/06/2007)
HEC-2 Guidelines (PDF, 11,000 KB, 08/20/2007)
TSARP White Papers
 HEC-HMS 3.1.0 (ZIP, 48.5 MB, 08/23/2007)
HEC-RAS 3.0.1 (ZIP, 19.8MB, 07/06/2007)
To download and save a file to disk:
PC:Right-click the link and choose the option, "Save Target As..."
Mac:Control-click the link and choose the option, "Download Link to Disk"
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