Valley, Phillips, Blaine, and Hill Counties are working with MT DNRC and FEMA to update and produce new Flood Insurance Rate Maps for the Milk River Watershed. Updated floodplain maps will depict the latest, most accurate flood risk data, and will eventually replace FEMA’s existing floodplain maps for all 4 counties.
This project will update 2,325 stream miles.Project funding was broken up into two phases. Phase I of this project will cover parts of the study for the Milk River and all of the study for the tributaries. Phase II (which is dependent on available grant funds from FEMA) will finish the study for the Milk River.
Hydrology Reports
- Volume 1 Tributaries and Waterbodiess prepared by Michael Baker Int.
- Volume 2 Stream Gage Analysis prepared by Michael Baker Int.
DNRC held project kickoff meetings with the communities November 5-7, 2019.
- Hill County/ City of Havre November 5, 2019- to view the slides from the meeting click here.
- Blaine County/ City of Chinook, November 6, 2019- to view the slides from the meeting click here.
- Phillips County/ City of Malta, November 6, 2019- to view the slides from the meeting click here.
- Valley County/ City of Glasgow, November 7, 2019- to view the slides from the meeting click here.
To view the proposed floodplain mapping click here.
Background on the existing floodplain maps:
The City of Glasgow had a floodplain map since 1974. That map was rescinded with no new map issued. In 1978 Valley County got the first set of floodplain maps. They used the information they had at the time to show areas with high risk of flooding. Most of the county has approximate paper maps and the maps are based on data collected in the 1970’s. Except for the Town of Nashua, Nashua had an updated study done in 2007 as part of a study to update the floodplain maps for Porcupine Creek.
To view the proposed floodplain mapping click here.
Background on the existing floodplain maps:
Phillips County has had floodplain maps since 1978. In the early 1980s FEMA conducted a new study to update the maps in the county. Most of the county has had the same maps that were issued from 1987. Except for the City of Malta. In 1997 the city coordinated with the U.S. Army Corps of Engineers to build a levee through the city. Once the levee was constructed a map revision was done to show a reduced risk on the landward side of the newly constructed levee through the City.
To view the proposed floodplain mapping click here.
Background on the floodplain maps:
Blaine County has had floodplain maps since 1978. In the early 1980s a flood study was conducted with updated maps being issued in 1987. In 2006 a new study was conducted on the Fort Belknap Indian Reservation; the project also took the current effective county maps from 1987 and made them digital. Essentially most of the maps are based off data that was gathered in the early 1980s.
To view the proposed floodplain mapping click here.
Background on the floodplain maps:
Hill County has had floodplain maps since 1978. In the early 1980s a new flood study was conducted, and new maps were issued in 1988. There have been no updates or revisions to the maps with the exception of 5 miles on Big Sandy Creek and 4 miles along Beaver Creek.
Hill County has had floodplain maps since 1978. In the early 1980s a new flood study was conducted, and new maps were issued in 1988. There have been no updates or revisions to the maps with the exception of 5 miles on Big Sandy Creek and 4 miles along Beaver Creek.
Estimated Timeline for project completion.
