Preliminary floodplain maps: Clark Fork River, Bitterroot River and Rock Creek

FEMA has published preliminary flood hazard information for these rivers, and this map has been updated with it. An overlay showing every area in a preliminary floodplain designation is on by default and can be turned off in the layers list.

Missoula County Voice site

This floodplain tool contains GIS information to help identify the Federal Emergency Management Agency (FEMA) designated 100-year floodplain in Missoula County outside the Missoula city limits. For floodplain information within the City of Missoula, contact the City Floodplain Administrator at (406) 552-6625.

This GIS information does not imply that the subject property will or will not be free from flooding or damage. A property not in a designated 100-year floodplain may be damaged by a flood greater than predicted by FEMA or from a local drainage problem not shown on the FEMA floodplain map. Reliance on this GIS information does not create liability on the part of Missoula County or any office or employee thereof from any damage that results from reliance on this information.

If the property is within the designated floodplain or a LOMC has been approved, a floodplain development permit may be required. Contact the County Floodplain Administrator at (406) 258-4657 or contact Floodplain & Shoreline Administration online.

Search

Type an address, parcel geocode (dashes optional), owner name or LOMC case number in the search box in the upper right and pick a suggestion. The Floodplain Information panel opens for that property.

Click the map

Click anywhere to see the effective and preliminary flood zones there and on the rest of the parcel, the FIRM panel, and any LOMCs, elevation certificates or shoreline permits on file. Click a document symbol to open straight to that document.

LOMCs, elevation certificates and flood insurance

Amendments to the floodplain maps are approved by FEMA through the Letter of Map Change (LOMC) process. Properties with LOMCs remain subject to Missoula County Floodplain Regulations but are exempt from federal flood insurance requirements. Properties with LOMCs available from Missoula County may be selected in the tool.

Federal flood insurance may be required for improvements located in the designated floodplain. The lending institution is responsible for making that determination. Elevation certificates may be used to determine the cost of flood insurance. Properties with elevation certificates available from Missoula County may be selected in the tool.

Layers

The layers button opens the layer list (with opacity and legend for each service), the full legend and the basemaps, including the 1997 flood imagery.

Printing

The print button makes an 8½ × 11 PDF (portrait or landscape) of the current view with the floodplain legend and the selected property's geocode and legal description. When it's ready, open it from the link.

Tools

The upper-right toolbar opens floodplain information, layers and print, and clears highlights. Below it are zoom, home, your location and previous extent. The lower-left toolbar has help, measure and the compass.

Moving around

Drag to pan, scroll or pinch to zoom, and double-click to zoom in one step.

Missoula County Floodplain Administration

Matt Heimel, Floodplain Administrator
Phone: (406) 258-4657
Contact Floodplain & Shoreline Administration

City of Missoula

City Floodplain Administrator: (406) 552-6625

Map problems

[email protected]

Reference only

Always consult original records and verify accuracy before relying on this system.

While Missoula County has made all attempts to ensure the correctness and suitability of information under our control and to correct any problems or errors which have been brought to our attention, no representation or guarantee can be made as to the correctness or suitability of that information or any other linked information presented, referenced, or implied. No endorsement is intended or made of any hypertext link, product, service, or information either by its inclusion or exclusion from this system.

The information provided throughout this system is for reference only, so anyone using this information should first consult original records and personally verify the accuracy of any and all information provided.

For information security purposes, the computer systems that host Missoula County websites employ software to monitor network traffic and identify unauthorized attempts to compromise its devices. These attempts may be subject to legal action, including attempts to mine or grab data from county web servers for personal use.

This site is subject to changes without prior notification. Please send questions or comments to [email protected].