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1539 Eleventh Ave. Helena, MT 59601
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Maps and Technical Reports


Below are the most current technical information and draft floodplain maps for the Madison, Jefferson, Ruby, Beaverhead Rivers, Three Forks Area (Jefferson and Madison Rivers), and Mill, Indian and South Boulder Creeks.  *Maps are draft data and may be subject to change.

Madison River (additional maps in Three Forks Area below)

Index Map 12 Map 24 Map 36 Map 48 Map 59 Map 71 Map 83
Map 1 Map 13 Map 25 Map 37 Map 49 Map 60 Map 72 Map 84
Map 2 Map 14 Map 26 Map 38 Map 50 Map 61 Map 73 Map 85
Map 3 Map 15 Map 27 Map 39 Map 51 Map 62 Map 74 Map 86
Map 4 Map 16 Map 28 Map 40 Map 52a Map 63 Map 75 Map 87
Map 5 Map 17 Map 29 Map 41 Map 52b Map 64 Map 76 Map 88
Map 6 Map 18 Map 30 Map 42 Map 53 Map 65 Map 77 Map 89
Map 7 Map 19 Map 31 Map 43 Map 54 Map 66 Map 78 Map 90
Map 8 Map 20 Map 32 Map 44 Map 55 Map 67 Map 79 Map 91
Map 9 Map 21 Map 33 Map 45 Map 56 Map 68 Map 80
Map 10 Map 22 Map 34 Map 46 Map 57 Map 69 Map 81
Map 11 Map 23 Map 35 Map 47 Map 58 Map 70 Map 82

Jefferson River  (see Three Forks Area for maps downstream of Meridian bridge)   

Index Map 11 Map 22 Map 33 Map 44 Map 55 Map 66 Map 77
Map 1 Map 12 Map 23 Map 34 Map 45 Map 56 Map 67 Map 78
Map 2 Map 13 Map 24 Map 35 Map 46 Map 57 Map 68 Map 79
Map 3 Map 14 Map 25 Map 36 Map 47 Map 58 Map 69 Map 80
Map 4 Map 15 Map 26 Map 37 Map 48 Map 59 Map 70 Map 81
Map 5 Map 16 Map 27 Map 38 Map 49 Map 60 Map 71 Map 82
Map 6 Map 17 Map 28 Map 39 Map 50 Map 61 Map 72 Map 83
Map 7 Map 18 Map 29 Map 40 Map 51 Map 62 Map 73 Map 84
Map 8 Map 19 Map 30 Map 41 Map 52 Map 63 Map 74
Map 9 Map 20 Map 31 Map 42 Map 53 Map 64 Map 75
Map 10 Map 21 Map 32 Map 43 Map 54 Map 65 Map 76

Beaverhead River

Index Map 6 Map 12 Map 18 Map 24 Map 30
Map 1 Map 7 Map 13 Map 19 Map 25 Map 31
Map 2 Map 8 Map 14 Map 20 Map 26 Map 32
Map 3 Map 9 Map 15 Map 21 Map 27 Map 33
Map 4 Map 10 Map 16 Map 22 Map 28 Map 34
Map 5 Map 11 Map 17 Map 23 Map 29 Map 35

Ruby River

Index Map 7 Map 14 Map 21 Map 28 Map 35
Map 1 Map 8 Map 15 Map 22 Map 29 Map 36
Map 2 Map 9 Map 16 Map 23 Map 30 Map 37
Map 3 Map 10 Map 17 Map 24 Map 31 Map 38
Map 4 Map 11 Map 18 Map 25 Map 32 Map 39
Map 5 Map 12 Map 19 Map 26 Map 33 Map 40
Map 6 Map 13 Map 20 Map 27 Map 34 Map 41

Three Forks area (Jefferson and Madison Rivers)

Index Map 11 Map 22 Map 33 Map 44
Map 1 Map 12 Map 23 Map 34 Map 45
Map 2 Map 13 Map 24 Map 35 Map 46
Map 3 Map 14 Map 25 Map 36 Map 47
Map 4 Map 15 Map 26 Map 37 Map 48
Map 5 Map 16 Map 27 Map 38 Map 49
Map 6 Map 17 Map 28 Map 39
Map 7 Map 18 Map 29 Map 40
Map 8 Map 19 Map 30 Map 41
Map 9 Map 20 Map 31 Map 42
Map 10 Map 21 Map 32 Map 43

Indian Creek

Indian Creek Maps

Mill Creek 

Mill Creek Maps

South Boulder Creek

South Boulder Creek Maps


Hydrology Reports

Madison River Watershed - prepared by Michael Baker International

Jefferson River Watershed (includes Ruby and Beaverhead Rivers) - prepared by Michael Baker International

Hydraulic Reports
(appendices available upon request)

Madison River - prepared by Michael Baker International

Jefferson River- prepared by Great West Engineering (area under review)

Beaverhead River, Ruby River and Splits - prepared by Allied Engineering

Indian and Mill Creeks and S. Boulder RIver - prepared by DOWL

Three Forks area - prepared by Michael Baker International 

Ice Gorging / Ice Jam Information

Three Forks Ice Jam Analysis 

 

More Info

Floodplain FAQs

Maps and Technical Reports

Flood Study Process

 

Madison County

Cody Marxer
Floodplain Administrator
(406) 872-6359

Town of Ennis
Town of Twin Bridges

Jonathan Weaver
Floodplain Administrator
(406) 449-8627

Town of Sheridan

Bob Stump
Mayor/Floodplain Administrator
(406) 842-5431

Gallatin County

Sean O'Callaghan
Floodplain Administrator
(406) 582-3130

City of Three Forks

Kelly Smith
Floodplain Administrator
(406) 285-3431

Jefferson County

Megan Bullock
Floodplain Administrator
(406) 225-4126

Broadwater County

Jerry Grebenc
Floodplain Administrator
(406) 449-8627

DNRC Contacts

Nadene Wadsworth
DNRC Outreach Specialist
(406) 444-6732

Tiffany Lyden
DNRC Outreach Specialist
(406) 444-0599