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FLATHEAD COUNTY, MONTANA AND INCORPORATED AREAS VOLUME 2 OF 2 COMMUNITY NAME COMMUNITY NUMBER COLUMBIA FALLS, CITY OF 300024 FLATHEAD COUNTY (UNINCORPORATED AREAS) 300023 KALISPELL, CITY OF 300025 WHITEFISH, CITY OF 300026 Revised: November 4, 2015 Federal Emergency Management Agency FLOOD INSURANCE STUDY NUMBER 30029CV002C ---PAGE BREAK--- NOTICE TO FLOOD INSURANCE STUDY USERS Communities participating in the National Flood Insurance Program have established repositories of flood hazard data for floodplain management and flood insurance purposes. This Flood Insurance Study (FIS) report may not contain all data available within the Community Map Repository. Please contact the Community Map Repository for any additional data. The Federal Emergency Management Agency (FEMA) may revise and republish part or all of this FIS report at any time. In addition, FEMA may revise part of this FIS report by the Letter of Map Revision process, which does not involve republication or redistribution of the FIS report. Therefore, users should consult with community officials and check the Community Map Repository to obtain the most current FIS report components. Initial Countywide FIS Report Effective Date: September 28, 2007 First Revised Countywide FIS Report Effective Date: June 18, 2013 Second Revised Countywide FIS Report Effective Date: November 4, 2015 ---PAGE BREAK--- i TABLE OF CONTENTS Volume 1 Page 1.0 INTRODUCTION 1 1.1 Purpose of Study 1 1.2 Authority and Acknowledgments 1 1.3 Coordination 2 2.0 AREA STUDIED 4 2.1 Scope of Study 4 2.2 Community Description 5 2.3 Principal Flood Problems 12 2.4 Flood Protection Measures 18 3.0 ENGINEERING METHODS 20 3.1 Hydrologic Analyses 20 3.2 Hydraulic Analyses 30 3.3 Vertical Datum 40 4.0 FLOODPLAIN MANAGEMENT APPLICATIONS 42 4.1 Flood 42 4.2 Floodways 43 5.0 INSURANCE APPLICATIONS 74 6.0 FLOOD INSURANCE RATE MAP 75 7.0 OTHER STUDIES 77 8.0 LOCATION OF DATA 81 9.0 BIBLIOGRAPHY AND REFERENCES 82 10.0 REVISION DESCRIPTIONS 87 10.1 First Revision 87 10.2 Second Revision 88 ---PAGE BREAK--- ii TABLE OF CONTENTS (Continued) Volume 1 (Continued) Page FIGURES Figure 1 – Floodway Schematic 45 TABLES Table 1 – Streams Studied by Detailed Methods 5 Table 2 – Historic Flood Elevations on Flathead River 14 Table 3 – Summary of Discharges 26 Table 4 – Summary of Stillwater Elevations 29 Table 5 – Datum Conversion Factors 41 Table 6 – Floodway Data 46 Table 7 – Community Map History 76 Table 8 – Summary of LOMCs 81 ---PAGE BREAK--- iii TABLE OF CONTENTS (Continued) Volume 2 EXHIBITS Exhibit 1 – Flood Profiles Ashley Creek Panels 01P - 07P Bear Creek Panels 08P - 11P Blaine Creek Panel 12P Cow Creek at Whitefish Panels 13P - 16P Flathead River Panels 17P - 33P Lazy Creek Panel 34P Middle Fork Flathead River at Nyack Panels 35P - 37P Middle Fork Flathead River at West Glacier Panel 38P North Tributary to Ashley Creek Panel 39P Stillwater River above Spring Prairie Road Panel 40P Stillwater River near Kalispell Panels 41P - 45P Stillwater River near Olney Panel 46P Swan River Panels 47P - 50P Swan River at Bigfork Panel 51P Swift Creek Panel 52P Unnamed Tributary to Bowser Creek Panel 53P Unnamed Tributary to Bowser Creek Diverted Flow Panel 54P West Spring Creek Panels 55P - 56P West Spring Creek Tributary Panel 57P Whitefish River at Whitefish Panels 58P - 60P Whitefish River near Kalispell Panels 61P - 69P Exhibit 2 – Flood Insurance Rate Map Index Flood Insurance Rate Map ---PAGE BREAK--- 2915 2910 2920 2925 3000 500 1000 1500 2000 ELEVATION IN FEET (NAVD) STREAM DISTANCE IN FEET ABOVE LIMIT OF DETAILED STUDY FEDERAL EMERGENCY MANAGEMENT AGENCY FLATHEAD COUNTY, MT AND INCORPORATED AREAS FLOOD PROFILES ASHLEY CREEK 2500 C E LEGEND 0.2% ANNUAL CHANCE FLOOD 1% ANNUAL CHANCE FLOOD 2% ANNUAL CHANCE FLOOD 10% ANNUAL CHANCE FLOOD STREAM BED CROSS SECTION LOCATION 3500 4000 4500 6000 5000 5500 2915 2920 2910 0 D 01P 2930 2935 2940 6500 2925 2930 2935 2940 F A B ---PAGE BREAK--- 2915 2915 2920 2925 9500 7000 7500 8000 8500 ELEVATION IN FEET (NAVD) STREAM DISTANCE IN FEET ABOVE LIMIT OF DETAILED STUDY FEDERAL EMERGENCY MANAGEMENT AGENCY FLATHEAD COUNTY, MT AND INCORPORATED AREAS FLOOD PROFILES ASHLEY CREEK 9000 K L LEGEND 0.2% ANNUAL CHANCE FLOOD 1% ANNUAL CHANCE FLOOD 2% ANNUAL CHANCE FLOOD 10% ANNUAL CHANCE FLOOD STREAM BED CROSS SECTION LOCATION 10,000 10,500 11,000 12,500 11,500 12,000 2910 2920 2925 2910 6500 J H I 02P G M 13,000 2930 2935 2930 2935 2940 2940 ---PAGE BREAK--- 2915 2915 2920 2925 ELEVATION IN FEET (NAVD) STREAM DISTANCE IN FEET ABOVE LIMIT OF DETAILED STUDY FEDERAL EMERGENCY MANAGEMENT AGENCY FLATHEAD COUNTY, MT AND INCORPORATED AREAS FLOOD PROFILES ASHLEY CREEK LEGEND 0.2% ANNUAL CHANCE FLOOD 1% ANNUAL CHANCE FLOOD 2% ANNUAL CHANCE FLOOD 10% ANNUAL CHANCE FLOOD STREAM BED CROSS SECTION LOCATION 2920 2925 03P 2930 2935 2930 2935 16,000 13,500 14,000 14,500 15,000 15,500 16,500 17,000 17,500 19,000 18,000 18,500 13,000 N O P Q 19,500 ---PAGE BREAK--- 2920 2925 ELEVATION IN FEET (NAVD) STREAM DISTANCE IN FEET ABOVE LIMIT OF DETAILED STUDY FEDERAL EMERGENCY MANAGEMENT AGENCY FLATHEAD COUNTY, MT AND INCORPORATED AREAS FLOOD PROFILES ASHLEY CREEK LEGEND 0.2% ANNUAL CHANCE FLOOD 1% ANNUAL CHANCE FLOOD 2% ANNUAL CHANCE FLOOD 10% ANNUAL CHANCE FLOOD STREAM BED CROSS SECTION LOCATION 2920 2925 04P 2930 2935 2930 2935 22,500 20,000 20,500 21,000 21,500 22,000 23,000 23,500 24,000 25,500 24,500 25,000 19,500 R S 26,000 ---PAGE BREAK--- 2925 2930 ELEVATION IN FEET (NAVD) STREAM DISTANCE IN FEET ABOVE LIMIT OF DETAILED STUDY FEDERAL EMERGENCY MANAGEMENT AGENCY FLATHEAD COUNTY, MT AND INCORPORATED AREAS FLOOD PROFILES ASHLEY CREEK LEGEND 0.2% ANNUAL CHANCE FLOOD 1% ANNUAL CHANCE FLOOD 2% ANNUAL CHANCE FLOOD 10% ANNUAL CHANCE FLOOD STREAM BED CROSS SECTION LOCATION 2920 2925 05P 2935 2940 2930 2935 29,000 26,500 27,000 27,500 28,000 28,500 26,000 U T W X 29,500 30,000 30,500 31,000 31,500 32,000 32,500 2920 2940 2945 2950 2955 2945 2950 2955 Y Z AA V ---PAGE BREAK--- 2935 2940 ELEVATION IN FEET (NAVD) STREAM DISTANCE IN FEET ABOVE LIMIT OF DETAILED STUDY FEDERAL EMERGENCY MANAGEMENT AGENCY FLATHEAD COUNTY, MT AND INCORPORATED AREAS FLOOD PROFILES ASHLEY CREEK 2940 2945 06P 2945 2950 2950 2955 35,500 33,000 33,500 34,000 34,500 35,000 32,500 AC AB AD 36,000 36,500 37,000 37,500 38,000 38,500 39,000 2955 2960 2965 2970 2975 2960 2965 2970 2975 AE AF AG AH LEGEND 0.2% ANNUAL CHANCE FLOOD 1% ANNUAL CHANCE FLOOD 2% ANNUAL CHANCE FLOOD 10% ANNUAL CHANCE FLOOD STREAM BED CROSS SECTION LOCATION 4% ANNUAL CHANCE FLOOD ---PAGE BREAK--- 2960 2965 ELEVATION IN FEET (NAVD) STREAM DISTANCE IN FEET ABOVE LIMIT OF DETAILED STUDY FEDERAL EMERGENCY MANAGEMENT AGENCY FLATHEAD COUNTY, MT AND INCORPORATED AREAS FLOOD PROFILES ASHLEY CREEK 2965 2970 07P 2970 2975 2975 2980 42,000 39,500 40,000 40,500 41,000 41,500 39,000 42,500 43,000 43,500 44,000 44,500 45,000 45,500 2980 2985 2990 2995 3000 2985 2990 2995 3000 AJ AI AK AL AM AN LEGEND 0.2% ANNUAL CHANCE FLOOD 1% ANNUAL CHANCE FLOOD 2% ANNUAL CHANCE FLOOD 10% ANNUAL CHANCE FLOOD STREAM BED CROSS SECTION LOCATION 4% ANNUAL CHANCE FLOOD AO ---PAGE BREAK--- 4340 4350 4360 4370 31,500 29,000 29,500 30,000 30,500 ELEVATION IN FEET (NAVD) STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH MIDDLE FORK OF THE FLATHEAD RIVER FEDERAL EMERGENCY MANAGEMENT AGENCY FLATHEAD COUNTY, MT AND INCORPORATED AREAS FLOOD PROFILES BEAR CREEK 31,000 A B C LEGEND 0.2% ANNUAL CHANCE FLOOD 1% ANNUAL CHANCE FLOOD 2% ANNUAL CHANCE FLOOD 10% ANNUAL CHANCE FLOOD STREAM BED CROSS SECTION LOCATION 32,000 32,500 33,000 34,500 33,500 34,000 4330 4320 28,500 D 4380 4350 4360 4370 4380 4330 4340 08P ---PAGE BREAK--- 4380 4390 4400 4410 38,000 35,500 36,000 36,500 37,000 ELEVATION IN FEET (NAVD) STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH MIDDLE FORK OF THE FLATHEAD RIVER FEDERAL EMERGENCY MANAGEMENT AGENCY FLATHEAD COUNTY, MT AND INCORPORATED AREAS FLOOD PROFILES BEAR CREEK 37,500 E F M LEGEND 0.2% ANNUAL CHANCE FLOOD 1% ANNUAL CHANCE FLOOD 2% ANNUAL CHANCE FLOOD 10% ANNUAL CHANCE FLOOD STREAM BED CROSS SECTION LOCATION 38,500 39,000 39,500 34,500 40,000 40,500 4370 35,000 4420 4430 4440 N G H I J K L 4390 4400 4410 4420 4380 4360 4430 4440 09P TOP OF ROAD 4433.40 FEET LOW STEEL 4432.60 FEET ---PAGE BREAK--- 4450 4460 4470 4480 44,000 41,500 42,000 42,500 43,000 ELEVATION IN FEET (NAVD) STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH MIDDLE FORK OF THE FLATHEAD RIVER FEDERAL EMERGENCY MANAGEMENT AGENCY FLATHEAD COUNTY, MT AND INCORPORATED AREAS FLOOD PROFILES BEAR CREEK 43,500 O Q LEGEND 0.2% ANNUAL CHANCE FLOOD 1% ANNUAL CHANCE FLOOD 2% ANNUAL CHANCE FLOOD 10% ANNUAL CHANCE FLOOD STREAM BED CROSS SECTION LOCATION 44,500 45,000 45,000 40,500 45,500 46,000 4440 4430 41,000 4490 4500 P 46,500 4490 4500 4510 4520 4500 4510 4520 4530 4490 4480 4490 4500 4510 4460 4470 4510 4450 4430 4440 4530 10P ---PAGE BREAK--- 4530 4540 4550 4560 48,000 46,750 47,000 47,250 47,500 ELEVATION IN FEET (NAVD) STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH MIDDLE FORK OF THE FLATHEAD RIVER FEDERAL EMERGENCY MANAGEMENT AGENCY FLATHEAD COUNTY, MT AND INCORPORATED AREAS FLOOD PROFILES BEAR CREEK 47,750 R S LEGEND 0.2% ANNUAL CHANCE FLOOD 1% ANNUAL CHANCE FLOOD 2% ANNUAL CHANCE FLOOD 10% ANNUAL CHANCE FLOOD STREAM BED CROSS SECTION LOCATION 48,250 48,500 48,750 49,000 4520 4510 46,500 4570 4580 4540 4550 4560 4570 4520 4530 4590 4580 4590 11P ---PAGE BREAK--- 2970 2980 2990 ELEVATION IN FEET (NAVD) STREAM DISTANCE IN FEET ABOVE MENNONITE CHURCH ROAD FEDERAL EMERGENCY MANAGEMENT AGENCY FLATHEAD COUNTY, MT AND INCORPORATED AREAS FLOOD PROFILES BLAINE CREEK 12,000 STREAM BED CROSS SECTION LOCATION 12,500 13,000 13,500 12P 2980 2990 2970 C 14,000 11,500 11,000 14,500 B A LEGEND 1% ANNUAL CHANCE FLOOD LIMIT OF DETAILED STUDY LIMIT OF DETAILED STUDY ---PAGE BREAK--- 3000 3005 3010 1000 200 400 600 ELEVATION IN FEET (NAVD) STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH WHITEFISH RIVER FEDERAL EMERGENCY MANAGEMENT AGENCY FLATHEAD COUNTY, MT AND INCORPORATED AREAS FLOOD PROFILES COW CREEK AT WHITEFISH 800 LEGEND 0.2% ANNUAL CHANCE FLOOD 1% ANNUAL CHANCE FLOOD 2% ANNUAL CHANCE FLOOD 10% ANNUAL CHANCE FLOOD STREAM BED CROSS SECTION LOCATION 1200 1400 1600 2200 1800 2000 2400 13P 2600 0 3005 3010 3000 2995 2995 4% ANNUAL CHANCE FLOOD 2990 2990 B C A 3015 3015 PRIVATE CROSSING PARK AVENUE FLOODING CONTROLLED BY WHITEFISH RIVER ---PAGE BREAK--- 3010 3015 3020 3600 2800 3000 3200 ELEVATION IN FEET (NAVD) STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH WHITEFISH RIVER FEDERAL EMERGENCY MANAGEMENT AGENCY FLATHEAD COUNTY, MT AND INCORPORATED AREAS FLOOD PROFILES COW CREEK AT WHITEFISH 3400 LEGEND 0.2% ANNUAL CHANCE FLOOD 1% ANNUAL CHANCE FLOOD 2% ANNUAL CHANCE FLOOD 10% ANNUAL CHANCE FLOOD STREAM BED CROSS SECTION LOCATION 3800 4000 4200 4800 4400 4600 5000 14P 5200 2600 3015 3020 3010 3005 3005 4% ANNUAL CHANCE FLOOD 3000 3000 D E F CREEKVIEW DRIVE ---PAGE BREAK--- 3015 3020 3025 6200 5400 5600 5800 ELEVATION IN FEET (NAVD) STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH WHITEFISH RIVER FEDERAL EMERGENCY MANAGEMENT AGENCY FLATHEAD COUNTY, MT AND INCORPORATED AREAS FLOOD PROFILES COW CREEK AT WHITEFISH 6000 LEGEND 0.2% ANNUAL CHANCE FLOOD 1% ANNUAL CHANCE FLOOD 2% ANNUAL CHANCE FLOOD 10% ANNUAL CHANCE FLOOD STREAM BED CROSS SECTION LOCATION 6400 6600 6800 7400 7000 7200 7600 15P 7800 5200 3020 3025 3015 3010 3010 4% ANNUAL CHANCE FLOOD 3005 3005 G H PUBLIC TRAIL ---PAGE BREAK--- 3025 3030 8800 8000 8200 8400 ELEVATION IN FEET (NAVD) STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH WHITEFISH RIVER FEDERAL EMERGENCY MANAGEMENT AGENCY FLATHEAD COUNTY, MT AND INCORPORATED AREAS FLOOD PROFILES COW CREEK AT WHITEFISH 8600 LEGEND 0.2% ANNUAL CHANCE FLOOD 1% ANNUAL CHANCE FLOOD 2% ANNUAL CHANCE FLOOD 10% ANNUAL CHANCE FLOOD STREAM BED CROSS SECTION LOCATION 9000 9200 16P 7800 3030 3025 3020 3020 4% ANNUAL CHANCE FLOOD 3015 3015 J K I PUBLIC TRAIL EAST 2ND STREET ---PAGE BREAK--- 2840 2850 2860 2890 18,000 13,000 14,000 15,000 16,000 ELEVATION IN FEET (NAVD) STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH FLATHEAD LAKE FEDERAL EMERGENCY MANAGEMENT AGENCY FLATHEAD COUNTY, MT AND INCORPORATED AREAS FLOOD PROFILES FLATHEAD RIVER 17,000 A LEGEND 0.2% ANNUAL CHANCE FLOOD 1% ANNUAL CHANCE FLOOD 2% ANNUAL CHANCE FLOOD 10% ANNUAL CHANCE FLOOD STREAM BED CROSS SECTION LOCATION 19,000 20,000 21,000 24,000 22,000 23,000 2910 12,000 2900 11,000 2840 2910 2850 2860 2890 2900 B C D E F G H I J K L M N P Q O 17P EFFECTS FROM FLATHEAD LAKE 1% ANNUAL CHANCE BACKWATER ---PAGE BREAK--- 2850 2860 2870 2880 31,000 26,000 27,000 28,000 29,000 ELEVATION IN FEET (NAVD) STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH FLATHEAD LAKE FEDERAL EMERGENCY MANAGEMENT AGENCY FLATHEAD COUNTY, MT AND INCORPORATED AREAS FLOOD PROFILES FLATHEAD RIVER 30,000 LEGEND 0.2% ANNUAL CHANCE FLOOD 1% ANNUAL CHANCE FLOOD 2% ANNUAL CHANCE FLOOD 10% ANNUAL CHANCE FLOOD STREAM BED CROSS SECTION LOCATION 32,000 33,000 34,000 37,000 35,000 36,000 2840 25,000 2890 24,000 2850 2840 2860 2870 2880 2890 R S T U V W X Y 2900 2900 2910 2910 18P ---PAGE BREAK--- 2840 2850 2860 2870 44,000 39,000 40,000 41,000 42,000 ELEVATION IN FEET (NAVD) STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH FLATHEAD LAKE FEDERAL EMERGENCY MANAGEMENT AGENCY FLATHEAD COUNTY, MT AND INCORPORATED AREAS FLOOD PROFILES FLATHEAD RIVER 43,000 LEGEND 0.2% ANNUAL CHANCE FLOOD 1% ANNUAL CHANCE FLOOD 2% ANNUAL CHANCE FLOOD 10% ANNUAL CHANCE FLOOD STREAM BED CROSS SECTION LOCATION 45,000 46,000 47,000 50,000 48,000 49,000 2830 38,000 2890 37,000 2840 2830 2850 2860 2870 2890 Z AA AB AC AD AE AG AH 2900 2900 2910 2910 AF 19P ---PAGE BREAK--- 2830 2840 2850 57,000 52,000 53,000 54,000 55,000 ELEVATION IN FEET (NAVD) STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH FLATHEAD LAKE FEDERAL EMERGENCY MANAGEMENT AGENCY FLATHEAD COUNTY, MT AND INCORPORATED AREAS FLOOD PROFILES FLATHEAD RIVER 56,000 LEGEND 0.2% ANNUAL CHANCE FLOOD 1% ANNUAL CHANCE FLOOD 2% ANNUAL CHANCE FLOOD 10% ANNUAL CHANCE FLOOD STREAM BED CROSS SECTION LOCATION 58,000 59,000 60,000 63,000 61,000 62,000 51,000 2890 50,000 2830 2840 2850 2890 AI AJ AK AL 2900 2900 2910 2910 20P ---PAGE BREAK--- 2840 2850 2860 70,000 65,000 66,000 67,000 68,000 ELEVATION IN FEET (NAVD) STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH FLATHEAD LAKE FEDERAL EMERGENCY MANAGEMENT AGENCY FLATHEAD COUNTY, MT AND INCORPORATED AREAS FLOOD PROFILES FLATHEAD RIVER 69,000 LEGEND 0.2% ANNUAL CHANCE FLOOD 1% ANNUAL CHANCE FLOOD 2% ANNUAL CHANCE FLOOD 10% ANNUAL CHANCE FLOOD STREAM BED CROSS SECTION LOCATION 71,000 72,000 73,000 76,000 74,000 75,000 64,000 2890 63,000 2840 2850 2860 2890 AM AN AO 2900 2900 2910 2910 21P ---PAGE BREAK--- 2860 2870 83,000 78,000 79,000 80,000 81,000 ELEVATION IN FEET (NAVD) STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH FLATHEAD LAKE FEDERAL EMERGENCY MANAGEMENT AGENCY FLATHEAD COUNTY, MT AND INCORPORATED AREAS FLOOD PROFILES FLATHEAD RIVER 82,000 LEGEND 0.2% ANNUAL CHANCE FLOOD 1% ANNUAL CHANCE FLOOD 2% ANNUAL CHANCE FLOOD 10% ANNUAL CHANCE FLOOD STREAM BED CROSS SECTION LOCATION 84,000 85,000 86,000 89,000 87,000 88,000 77,000 2890 76,000 2860 2870 2890 AP AS 2900 2900 2910 2910 2830 2840 2850 2840 2850 AQ AR 22P ASHLEY CREEK ---PAGE BREAK--- 2850 2860 96,000 91,000 92,000 93,000 94,000 ELEVATION IN FEET (NAVD) STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH FLATHEAD LAKE FEDERAL EMERGENCY MANAGEMENT AGENCY FLATHEAD COUNTY, MT AND INCORPORATED AREAS FLOOD PROFILES FLATHEAD RIVER 95,000 LEGEND 0.2% ANNUAL CHANCE FLOOD 1% ANNUAL CHANCE FLOOD 2% ANNUAL CHANCE FLOOD 10% ANNUAL CHANCE FLOOD STREAM BED CROSS SECTION LOCATION 97,000 98,000 99,000 102,000 100,000 101,000 90,000 2870 89,000 2850 2860 2870 AT AW 2900 2900 2910 2910 2840 2840 AU AV 23P ---PAGE BREAK--- 2870 2880 109,000 104,000 105,000 106,000 107,000 ELEVATION IN FEET (NAVD) STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH FLATHEAD LAKE FEDERAL EMERGENCY MANAGEMENT AGENCY FLATHEAD COUNTY, MT AND INCORPORATED AREAS FLOOD PROFILES FLATHEAD RIVER 108,000 LEGEND 0.2% ANNUAL CHANCE FLOOD 1% ANNUAL CHANCE FLOOD 2% ANNUAL CHANCE FLOOD 10% ANNUAL CHANCE FLOOD STREAM BED CROSS SECTION LOCATION 110,000 111,000 112,000 115,000 113,000 114,000 103,000 2890 102,000 2870 2880 2890 AX 2900 2900 2910 2910 2860 2860 AY BB 2850 2850 2840 AZ BA 28 NODE 27 26 24P PROFILE BASE LINE STILLWATER RIVER ---PAGE BREAK--- 2870 2880 122,000 117,000 118,000 119,000 120,000 ELEVATION IN FEET (NAVD) STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH FLATHEAD LAKE FEDERAL EMERGENCY MANAGEMENT AGENCY FLATHEAD COUNTY, MT AND INCORPORATED AREAS FLOOD PROFILES FLATHEAD RIVER 121,000 LEGEND 0.2% ANNUAL CHANCE FLOOD 1% ANNUAL CHANCE FLOOD 2% ANNUAL CHANCE FLOOD 10% ANNUAL CHANCE FLOOD STREAM BED CROSS SECTION LOCATION 123,000 124,000 125,000 128,000 126,000 127,000 116,000 2890 115,000 2870 2880 2890 BC 2900 2900 2910 2910 2920 2920 BD BF BE BG 24 23 25 25P PROFILE BASE LINE CONRAD DRIVE ELEVATION 2927.7 ELEVATION ---PAGE BREAK--- ---PAGE BREAK--- 2900 2910 148,000 143,000 144,000 145,000 146,000 ELEVATION IN FEET (NAVD) STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH FLATHEAD LAKE FEDERAL EMERGENCY MANAGEMENT AGENCY FLATHEAD COUNTY, MT AND INCORPORATED AREAS FLOOD PROFILES FLATHEAD RIVER 147,000 LEGEND 0.2% ANNUAL CHANCE FLOOD 1% ANNUAL CHANCE FLOOD 2% ANNUAL CHANCE FLOOD 10% ANNUAL CHANCE FLOOD STREAM BED CROSS SECTION LOCATION 149,000 150,000 151,000 154,000 152,000 153,000 142,000 2920 141,000 BN 2930 2940 BO BR BP BS 16 15 17 BQ 18 2950 2900 2910 2920 2930 2940 2950 27P PROFILE BASE LINE ---PAGE BREAK--- 2920 2930 161,000 156,000 157,000 158,000 159,000 ELEVATION IN FEET (NAVD) STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH FLATHEAD LAKE FEDERAL EMERGENCY MANAGEMENT AGENCY FLATHEAD COUNTY, MT AND INCORPORATED AREAS FLOOD PROFILES FLATHEAD RIVER 160,000 LEGEND 0.2% ANNUAL CHANCE FLOOD 1% ANNUAL CHANCE FLOOD 2% ANNUAL CHANCE FLOOD 10% ANNUAL CHANCE FLOOD STREAM BED CROSS SECTION LOCATION 162,000 163,000 164,000 167,000 165,000 166,000 155,000 2940 154,000 BT 2950 2960 BU BY BV 12 11 13 BW 14 2970 BX 2950 2960 2920 2930 2940 2970 28P PROFILE BASE LINE ---PAGE BREAK--- 2940 2950 174,000 169,000 170,000 171,000 172,000 ELEVATION IN FEET (NAVD) STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH FLATHEAD LAKE FEDERAL EMERGENCY MANAGEMENT AGENCY FLATHEAD COUNTY, MT AND INCORPORATED AREAS FLOOD PROFILES FLATHEAD RIVER 173,000 LEGEND 0.2% ANNUAL CHANCE FLOOD 1% ANNUAL CHANCE FLOOD 2% ANNUAL CHANCE FLOOD 10% ANNUAL CHANCE FLOOD STREAM BED CROSS SECTION LOCATION 175,000 176,000 177,000 180,000 178,000 179,000 168,000 2960 167,000 BZ 2970 2980 CA CD CB 8 7 9 CC 10 2950 2960 2940 2970 2980 2990 2990 29P PROFILE BASE LINE ---PAGE BREAK--- 2960 187,000 182,000 183,000 184,000 185,000 ELEVATION IN FEET (NAVD) STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH FLATHEAD LAKE FEDERAL EMERGENCY MANAGEMENT AGENCY FLATHEAD COUNTY, MT AND INCORPORATED AREAS FLOOD PROFILES FLATHEAD RIVER 186,000 LEGEND 0.2% ANNUAL CHANCE FLOOD 1% ANNUAL CHANCE FLOOD 2% ANNUAL CHANCE FLOOD 10% ANNUAL CHANCE FLOOD STREAM BED CROSS SECTION LOCATION 188,000 189,000 190,000 193,000 191,000 192,000 181,000 2970 180,000 CE 2980 2990 CF CH 4 3 5 CG 6 3000 2960 2970 2980 2990 3000 30P PROFILE BASE LINE ---PAGE BREAK--- 2970 2980 200,000 195,000 196,000 197,000 198,000 ELEVATION IN FEET (NAVD) STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH FLATHEAD LAKE FEDERAL EMERGENCY MANAGEMENT AGENCY FLATHEAD COUNTY, MT AND INCORPORATED AREAS FLOOD PROFILES FLATHEAD RIVER 199,000 LEGEND 0.2% ANNUAL CHANCE FLOOD 1% ANNUAL CHANCE FLOOD 2% ANNUAL CHANCE FLOOD 10% ANNUAL CHANCE FLOOD STREAM BED CROSS SECTION LOCATION 201,000 202,000 203,000 206,000 204,000 205,000 194,000 2990 193,000 CI 3000 3010 CJ CO 1 CK 2 3020 CN CL CM 2980 2990 2970 3000 3010 3020 31P PROFILE BASE LINE 4TH AVENUE STATE HIGHWAY 40 ---PAGE BREAK--- 2980 2990 213,000 208,000 209,000 210,000 211,000 ELEVATION IN FEET (NAVD) STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH FLATHEAD LAKE FEDERAL EMERGENCY MANAGEMENT AGENCY FLATHEAD COUNTY, MT AND INCORPORATED AREAS FLOOD PROFILES FLATHEAD RIVER 212,000 LEGEND 0.2% ANNUAL CHANCE FLOOD 1% ANNUAL CHANCE FLOOD 2% ANNUAL CHANCE FLOOD 10% ANNUAL CHANCE FLOOD STREAM BED CROSS SECTION LOCATION 214,000 215,000 216,000 219,000 217,000 218,000 207,000 3000 206,000 CP 3010 3020 CQ 3030 CR 2990 3000 2980 3010 3020 3030 32P ---PAGE BREAK--- 2990 226,000 221,000 222,000 223,000 224,000 ELEVATION IN FEET (NAVD) STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH FLATHEAD LAKE FEDERAL EMERGENCY MANAGEMENT AGENCY FLATHEAD COUNTY, MT AND INCORPORATED AREAS FLOOD PROFILES FLATHEAD RIVER 225,000 LEGEND 0.2% ANNUAL CHANCE FLOOD 1% ANNUAL CHANCE FLOOD 2% ANNUAL CHANCE FLOOD 10% ANNUAL CHANCE FLOOD STREAM BED CROSS SECTION LOCATION 227,000 220,000 3000 219,000 CS 3010 3020 CT 3030 CU 3040 3010 3020 3000 3030 3040 33P LIMIT OF DETAILED STUDY ---PAGE BREAK--- 2995 3000 3005 3000 500 1000 1500 2000 ELEVATION IN FEET (NAVD) STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH WHITEFISH LAKE FEDERAL EMERGENCY MANAGEMENT AGENCY FLATHEAD COUNTY, MT AND INCORPORATED AREAS FLOOD PROFILES LAZY CREEK 2500 A F LEGEND 0.2% ANNUAL CHANCE FLOOD 1% ANNUAL CHANCE FLOOD 2% ANNUAL CHANCE FLOOD 10% ANNUAL CHANCE FLOOD STREAM BED CROSS SECTION LOCATION 3500 4000 2990 3010 0 B C D E 3000 3005 3010 2990 2995 34P TOP OF ROAD ELEVATION 3001.60 FEET EFFECTS FROM WHITEFISH LAKE LOW CORD ELEVATION 3000.10 FEET 1% ANNUAL CHANCE BACKWATER ---PAGE BREAK--- 3280 3285 3290 6000 1000 2000 3000 4000 ELEVATION IN FEET (NAVD) STREAM DISTANCE IN FEET ABOVE STUDY LIMIT FEDERAL EMERGENCY MANAGEMENT AGENCY FLATHEAD COUNTY, MT AND INCORPORATED AREAS FLOOD PROFILES MIDDLE FORK FLATHEAD RIVER AT NYACK 5000 A E LEGEND 0.2% ANNUAL CHANCE FLOOD 1% ANNUAL CHANCE FLOOD 2% ANNUAL CHANCE FLOOD 10% ANNUAL CHANCE FLOOD STREAM BED CROSS SECTION LOCATION 7000 8000 3275 0 B 9000 10,000 3305 3310 3300 3295 F C D 3290 3295 3300 3280 3285 3305 3310 3315 3315 35P ---PAGE BREAK--- 3305 3310 3315 16,000 11,000 12,000 13,000 14,000 ELEVATION IN FEET (NAVD) STREAM DISTANCE IN FEET ABOVE STUDY LIMIT FEDERAL EMERGENCY MANAGEMENT AGENCY FLATHEAD COUNTY, MT AND INCORPORATED AREAS FLOOD PROFILES MIDDLE FORK FLATHEAD RIVER AT NYACK 15,000 H LEGEND 0.2% ANNUAL CHANCE FLOOD 1% ANNUAL CHANCE FLOOD 2% ANNUAL CHANCE FLOOD 10% ANNUAL CHANCE FLOOD STREAM BED CROSS SECTION LOCATION 17,000 18,000 3300 3295 10,000 19,000 20,000 3330 3335 3325 3320 G 3315 3320 3325 3305 3310 3330 3335 3340 3340 36P ---PAGE BREAK--- 3330 3335 3340 26,000 21,000 22,000 23,000 24,000 ELEVATION IN FEET (NAVD) STREAM DISTANCE IN FEET ABOVE STUDY LIMIT FEDERAL EMERGENCY MANAGEMENT AGENCY FLATHEAD COUNTY, MT AND INCORPORATED AREAS FLOOD PROFILES MIDDLE FORK FLATHEAD RIVER AT NYACK 25,000 K LEGEND 0.2% ANNUAL CHANCE FLOOD 1% ANNUAL CHANCE FLOOD 2% ANNUAL CHANCE FLOOD 10% ANNUAL CHANCE FLOOD STREAM BED CROSS SECTION LOCATION 27,000 28,000 3325 20,000 29,000 3355 3360 3350 3345 J I 3340 3345 3350 3330 3335 3355 3360 3365 3365 37P ---PAGE BREAK--- 3130 3140 3150 25,000 20,000 21,000 22,000 23,000 ELEVATION IN FEET (NAVD) STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH NORTH FORK FLATHEAD RIVER FEDERAL EMERGENCY MANAGEMENT AGENCY FLATHEAD COUNTY, MT AND INCORPORATED AREAS FLOOD PROFILES MIDDLE FORK FLATHEAD RIVER AT WEST GLACIER 24,000 A E LEGEND 0.2% ANNUAL CHANCE FLOOD 1% ANNUAL CHANCE FLOOD 2% ANNUAL CHANCE FLOOD 10% ANNUAL CHANCE FLOOD STREAM BED CROSS SECTION LOCATION 26,000 27,000 3120 19,000 B 28,000 29,000 3180 3170 3160 F C D 30,000 3150 3160 3170 3130 3140 3180 38P CONFLUENCE OF McDONALD CREEK LIMIT OF DETAILED STUDY LIMIT OF DETAILED STUDY ---PAGE BREAK--- CONFLUENCE WITH ASHLEY CREEK CULVERT LIMIT OF DETAILED STUDY 2930 ELEVATION IN FEET (NAVD) STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH ASHLEY CREEK FEDERAL EMERGENCY MANAGEMENT AGENCY FLATHEAD COUNTY, MT AND INCORPORATED AREAS FLOOD PROFILES NORTH TRIBUTARY TO ASHLEY CREEK LEGEND STREAM BED CROSS SECTION LOCATION 2935 2940 39P 2935 2940 2945 2950 200 400 600 0 2945 B A 800 1000 1200 1400 1600 2950 2955 2955 1% ANNUAL CHANCE FLOOD ---PAGE BREAK--- 2950 2960 5000 1000 2000 3000 ELEVATION IN FEET (NAVD) STREAM DISTANCE IN FEET ABOVE SPRING PRAIRIE ROAD FEDERAL EMERGENCY MANAGEMENT AGENCY FLATHEAD COUNTY, MT AND INCORPORATED AREAS FLOOD PROFILES STILLWATER RIVER ABOVE SPRING PRAIRIE ROAD 4000 LEGEND 1% ANNUAL CHANCE FLOOD STREAM BED CROSS SECTION LOCATION 40P 0 2950 2960 2970 2970 2980 2980 A 6000 7000 8000 9000 10,000 11,000 2990 2990 B UNNAMED ROAD ---PAGE BREAK--- 2900 2905 2910 22,500 20,500 21,000 21,500 ELEVATION IN FEET (NAVD) STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH FLATHEAD RIVER FEDERAL EMERGENCY MANAGEMENT AGENCY FLATHEAD COUNTY, MT AND INCORPORATED AREAS FLOOD PROFILES STILLWATER RIVER NEAR KALISPELL 22,000 LEGEND 0.2% ANNUAL CHANCE FLOOD 1% ANNUAL CHANCE FLOOD 2% ANNUAL CHANCE FLOOD 10% ANNUAL CHANCE FLOOD STREAM BED CROSS SECTION LOCATION 23,000 23,500 24,000 25,500 24,500 25,000 41P 2905 2910 2900 2915 2915 2895 2895 4% ANNUAL CHANCE FLOOD A B C D E 26,000 26,500 2890 2885 2890 2920 2920 ---PAGE BREAK--- 2900 2905 2910 29,000 27,000 27,500 28,000 ELEVATION IN FEET (NAVD) STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH FLATHEAD RIVER FEDERAL EMERGENCY MANAGEMENT AGENCY FLATHEAD COUNTY, MT AND INCORPORATED AREAS FLOOD PROFILES STILLWATER RIVER NEAR KALISPELL 28,500 LEGEND 0.2% ANNUAL CHANCE FLOOD 1% ANNUAL CHANCE FLOOD 2% ANNUAL CHANCE FLOOD 10% ANNUAL CHANCE FLOOD STREAM BED CROSS SECTION LOCATION 29,500 30,000 30,500 32,000 31,000 31,500 42P 26,500 2920 2925 2915 2930 2915 2910 4% ANNUAL CHANCE FLOOD F G H I J 32,500 33,000 2920 2925 2930 2935 2905 2935 ---PAGE BREAK--- 2915 2920 2925 35,500 33,500 34,000 34,500 ELEVATION IN FEET (NAVD) STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH FLATHEAD RIVER FEDERAL EMERGENCY MANAGEMENT AGENCY FLATHEAD COUNTY, MT AND INCORPORATED AREAS FLOOD PROFILES STILLWATER RIVER NEAR KALISPELL 35,000 LEGEND 0.2% ANNUAL CHANCE FLOOD 1% ANNUAL CHANCE FLOOD 2% ANNUAL CHANCE FLOOD 10% ANNUAL CHANCE FLOOD STREAM BED CROSS SECTION LOCATION 36,000 43P 33,000 2920 2925 2915 2930 2930 4% ANNUAL CHANCE FLOOD K L 2935 2940 2935 2940 36,500 2945 2945 2950 2950 2955 2955 M O N P R T S Q 37,000 37,500 38,000 38,500 39,000 39,500 ---PAGE BREAK--- 2935 2940 2945 42,000 40,000 40,500 41,000 ELEVATION IN FEET (NAVD) STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH FLATHEAD RIVER FEDERAL EMERGENCY MANAGEMENT AGENCY FLATHEAD COUNTY, MT AND INCORPORATED AREAS FLOOD PROFILES STILLWATER RIVER NEAR KALISPELL 41,500 LEGEND 0.2% ANNUAL CHANCE FLOOD 1% ANNUAL CHANCE FLOOD 2% ANNUAL CHANCE FLOOD 10% ANNUAL CHANCE FLOOD STREAM BED CROSS SECTION LOCATION 42,500 44P 39,500 2940 2945 2950 2950 4% ANNUAL CHANCE FLOOD 2955 2960 2955 2960 43,000 U W V 43,500 44,000 44,500 45,000 45,500 46,000 X ---PAGE BREAK--- 2945 2950 2955 48,500 46,500 47,000 47,500 ELEVATION IN FEET (NAVD) STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH FLATHEAD RIVER FEDERAL EMERGENCY MANAGEMENT AGENCY FLATHEAD COUNTY, MT AND INCORPORATED AREAS FLOOD PROFILES STILLWATER RIVER NEAR KALISPELL 48,000 LEGEND 0.2% ANNUAL CHANCE FLOOD 1% ANNUAL CHANCE FLOOD 2% ANNUAL CHANCE FLOOD 10% ANNUAL CHANCE FLOOD STREAM BED CROSS SECTION LOCATION 45P 46,000 2950 2955 2960 2960 4% ANNUAL CHANCE FLOOD 2965 2965 Y ---PAGE BREAK--- 3045 3025 3030 188,500 186,000 186,500 187,000 187,500 ELEVATION IN FEET (NAVD) STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH FLATHEAD RIVER FEDERAL EMERGENCY MANAGEMENT AGENCY FLATHEAD COUNTY, MT AND INCORPORATED AREAS FLOOD PROFILES STILLWATER RIVER NEAR OLNEY 188,000 A E LEGEND 0.2% ANNUAL CHANCE FLOOD 1% ANNUAL CHANCE FLOOD 2% ANNUAL CHANCE FLOOD 10% ANNUAL CHANCE FLOOD STREAM BED CROSS SECTION LOCATION 189,000 189,500 185,500 B 190,000 190,500 3040 3035 F C D G H 3030 3035 3040 3045 3025 46P LOWER STILLWATER LAKE CHUTE LIMIT OF DETAILED STUDY LIMIT OF DETAILED STUDY ---PAGE BREAK--- 2995 3000 21,000 16,000 17,000 18,000 19,000 ELEVATION IN FEET (NAVD) STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH FLATHEAD LAKE FEDERAL EMERGENCY MANAGEMENT AGENCY FLATHEAD COUNTY, MT AND INCORPORATED AREAS FLOOD PROFILES SWAN RIVER 20,000 LEGEND 0.2% ANNUAL CHANCE FLOOD 1% ANNUAL CHANCE FLOOD 2% ANNUAL CHANCE FLOOD 10% ANNUAL CHANCE FLOOD STREAM BED CROSS SECTION LOCATION 22,000 23,000 15,000 B 24,000 25,000 3010 3005 C D A 26,000 27,000 28,000 3015 E F G H I J K L M N 2995 3000 3005 3010 3015 3020 3020 47P LIMIT OF DETAILED STUDY ---PAGE BREAK--- 2995 3000 34,000 29,000 30,000 31,000 32,000 ELEVATION IN FEET (NAVD) STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH FLATHEAD LAKE FEDERAL EMERGENCY MANAGEMENT AGENCY FLATHEAD COUNTY, MT AND INCORPORATED AREAS FLOOD PROFILES SWAN RIVER 33,000 LEGEND 0.2% ANNUAL CHANCE FLOOD 1% ANNUAL CHANCE FLOOD 2% ANNUAL CHANCE FLOOD 10% ANNUAL CHANCE FLOOD STREAM BED CROSS SECTION LOCATION 35,000 36,000 28,000 O 37,000 38,000 3010 3005 P Q 39,000 40,000 41,000 3015 R S T U V W X Y Z AF 3020 3000 3005 3010 3015 3020 AA AB AC AD AE 48P MUD CREEK CONFLUENCE OF ---PAGE BREAK--- 3025 47,000 42,000 43,000 44,000 45,000 ELEVATION IN FEET (NAVD) STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH FLATHEAD LAKE FEDERAL EMERGENCY MANAGEMENT AGENCY FLATHEAD COUNTY, MT AND INCORPORATED AREAS FLOOD PROFILES SWAN RIVER 46,000 LEGEND 0.2% ANNUAL CHANCE FLOOD 1% ANNUAL CHANCE FLOOD 2% ANNUAL CHANCE FLOOD 10% ANNUAL CHANCE FLOOD STREAM BED CROSS SECTION LOCATION 48,000 49,000 41,000 50,000 51,000 3010 3005 AG 52,000 53,000 54,000 3015 AH AI AJ AL 3020 3025 3005 3010 3015 3020 AK 49P ---PAGE BREAK--- 60,000 55,000 56,000 57,000 58,000 ELEVATION IN FEET (NAVD) STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH FLATHEAD LAKE FEDERAL EMERGENCY MANAGEMENT AGENCY FLATHEAD COUNTY, MT AND INCORPORATED AREAS FLOOD PROFILES SWAN RIVER 59,000 LEGEND 0.2% ANNUAL CHANCE FLOOD 1% ANNUAL CHANCE FLOOD 2% ANNUAL CHANCE FLOOD 10% ANNUAL CHANCE FLOOD STREAM BED CROSS SECTION LOCATION 61,000 62,000 54,000 63,000 64,000 3010 AN 65,000 3015 AO AP AU BB 3020 3015 3020 3030 3025 3035 3040 3035 3040 3025 3030 AM AQ AR AS AT AV AW AX AY AZ 50P BA PETERSON CREEK CONFLUENCE OF COUNTY BOUNDARY HIGHWAY 209 TOP OF ROAD ELEV. 3053.7 LOW STEEL ELEV. 3049.7 LIMIT OF DETAILED STUDY ---PAGE BREAK--- 2900 2910 2920 1000 200 400 600 ELEVATION IN FEET (NAVD) STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH FLATHEAD LAKE FEDERAL EMERGENCY MANAGEMENT AGENCY FLATHEAD COUNTY, MT AND INCORPORATED AREAS FLOOD PROFILES SWAN RIVER AT BIGFORK 800 LEGEND 0.2% ANNUAL CHANCE FLOOD 1% ANNUAL CHANCE FLOOD 2% ANNUAL CHANCE FLOOD 10% ANNUAL CHANCE FLOOD STREAM BED CROSS SECTION LOCATION 1200 1400 1600 2200 1800 2000 2400 51P 2600 0 2910 2920 2900 2930 2930 2890 2890 4% ANNUAL CHANCE FLOOD 2880 2880 D B C E F A 1% ANNUAL CHANCE BACKWATER FROM FLATHEAD LAKE ---PAGE BREAK--- 2995 3000 3000 500 1000 1500 2000 ELEVATION IN FEET (NAVD) STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH WHITEFISH LAKE FEDERAL EMERGENCY MANAGEMENT AGENCY FLATHEAD COUNTY, MT AND INCORPORATED AREAS FLOOD PROFILES SWIFT CREEK 2500 LEGEND 0.2% ANNUAL CHANCE FLOOD 1% ANNUAL CHANCE FLOOD 2% ANNUAL CHANCE FLOOD 10% ANNUAL CHANCE FLOOD STREAM BED CROSS SECTION LOCATION 3500 4000 0 B 4500 5000 3010 3005 C D 3015 E F G H I J A 3020 3000 3005 3020 3025 3010 3015 3025 52P WHITEFISH LAKE LIMIT OF DETAILED STUDY CONFLUENCE WITH DELREY ROAD 1% ANNUAL CHANCE BACKWATER TOP OF ROAD ELEVATION 3022.1 LOW CORD ELEVATION 3020.9 EFFECTS FROM WHITEFISH LAKE ---PAGE BREAK--- 2970 2975 2980 2000 1400 1600 ELEVATION IN FEET (NAVD) STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH BOWSER CREEK FEDERAL EMERGENCY MANAGEMENT AGENCY FLATHEAD COUNTY, MT AND INCORPORATED AREAS FLOOD PROFILES UNNAMED TRIBUTARY TO BOWSER CREEK 1800 LEGEND 0.2% ANNUAL CHANCE FLOOD 1% ANNUAL CHANCE FLOOD 2% ANNUAL CHANCE FLOOD 10% ANNUAL CHANCE FLOOD STREAM BED CROSS SECTION LOCATION 2200 2400 2600 53P 2975 2980 2970 2965 2965 4% ANNUAL CHANCE FLOOD B C D A 2800 3000 TWO MILE DRIVE LATERAL WEIR LATERAL WEIR PRIVATE DRIVE LIMIT OF DETAILED STUDY DIVERSION FROM WEST SPRING CREEK LIMIT OF DETAILED STUDY ---PAGE BREAK--- 2976 2978 500 100 200 300 ELEVATION IN FEET (NAVD) STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH WEST SPRING CREEK FEDERAL EMERGENCY MANAGEMENT AGENCY FLATHEAD COUNTY, MT AND INCORPORATED AREAS FLOOD PROFILES UNNAMED TRIBUTARY TO BOWSER CREEK DIVERTED FLOW 400 LEGEND 0.2% ANNUAL CHANCE FLOOD 1% ANNUAL CHANCE FLOOD 2% ANNUAL CHANCE FLOOD 10% ANNUAL CHANCE FLOOD STREAM BED CROSS SECTION LOCATION 600 54P 0 2978 2976 2974 2974 4% ANNUAL CHANCE FLOOD 2972 2972 2970 B A ---PAGE BREAK--- 2955 2960 2965 2500 ELEVATION IN FEET (NAVD) STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH BOWSER CREEK FEDERAL EMERGENCY MANAGEMENT AGENCY FLATHEAD COUNTY, MT AND INCORPORATED AREAS FLOOD PROFILES WEST SPRING CREEK 2000 LEGEND 0.2% ANNUAL CHANCE FLOOD 1% ANNUAL CHANCE FLOOD 2% ANNUAL CHANCE FLOOD 10% ANNUAL CHANCE FLOOD STREAM BED CROSS SECTION LOCATION 3000 3500 4000 4500 55P 2960 2965 2955 2970 2970 2950 2950 4% ANNUAL CHANCE FLOOD B C D A 2975 5000 5500 6000 6500 2975 E ---PAGE BREAK--- 2975 2980 2985 9000 7000 7500 8000 ELEVATION IN FEET (NAVD) STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH BOWSER CREEK FEDERAL EMERGENCY MANAGEMENT AGENCY FLATHEAD COUNTY, MT AND INCORPORATED AREAS FLOOD PROFILES WEST SPRING CREEK 8500 LEGEND 0.2% ANNUAL CHANCE FLOOD 1% ANNUAL CHANCE FLOOD 2% ANNUAL CHANCE FLOOD 10% ANNUAL CHANCE FLOOD STREAM BED CROSS SECTION LOCATION 9500 10,000 10,500 11,000 56P 6500 2980 2985 2975 2990 2990 2970 2970 4% ANNUAL CHANCE FLOOD 2965 2960 2965 H I J G 2995 11,500 12,000 12,500 13,000 2995 3000 3000 F CONFLUENCE WITH UNNAMED TRIBUTARY TO BOWSER CREEK DIVERTED FLOW DIVERSION TO UNNAMED TRIBUTARY TO BOWSER CREEK ---PAGE BREAK--- 2995 3000 3005 2000 [PHONE REDACTED] ELEVATION IN FEET (NAVD) STREAM DISTANCE IN FEET FROM CONFLUENCE WITH WEST SPRING CREEK FEDERAL EMERGENCY MANAGEMENT AGENCY FLATHEAD COUNTY, MT AND INCORPORATED AREAS FLOOD PROFILES WEST SPRING CREEK TRIBUTARY 1600 LEGEND 0.2% ANNUAL CHANCE FLOOD 1% ANNUAL CHANCE FLOOD 2% ANNUAL CHANCE FLOOD 10% ANNUAL CHANCE FLOOD STREAM BED CROSS SECTION LOCATION 2400 2800 3200 3600 57P 0 3000 3005 2995 3010 3010 2990 2990 4% ANNUAL CHANCE FLOOD 2985 2980 2985 B C D E F G A 3015 3020 3015 3020 LIMIT OF DETAILED STUDY ---PAGE BREAK--- 2990 2995 3000 ELEVATION IN FEET (NAVD) STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH STILLWATER RIVER FEDERAL EMERGENCY MANAGEMENT AGENCY FLATHEAD COUNTY, MT AND INCORPORATED AREAS FLOOD PROFILES WHITEFISH RIVER AT WHITEFISH 82,000 LEGEND 0.2% ANNUAL CHANCE FLOOD 1% ANNUAL CHANCE FLOOD 2% ANNUAL CHANCE FLOOD 10% ANNUAL CHANCE FLOOD STREAM BED CROSS SECTION LOCATION 83,000 84,000 85,000 58P 2995 3000 2990 3005 3005 2985 2985 3010 3010 3015 3015 4% ANNUAL CHANCE FLOOD B C D E F 86,000 87,000 88,000 89,000 90,000 91,000 92,000 93,000 3020 3020 G H I J K L M 81,000 80,000 A MT HIGHWAY 40 PRIVATE DRIVE LIMIT OF DETAILED STUDY CONFLUENCE WITH WALKER CREEK CONFLUENCE WITH HASKILL CREEK ---PAGE BREAK--- 2990 2995 3000 98,000 95,000 96,000 ELEVATION IN FEET (NAVD) STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH STILLWATER RIVER FEDERAL EMERGENCY MANAGEMENT AGENCY FLATHEAD COUNTY, MT AND INCORPORATED AREAS FLOOD PROFILES WHITEFISH RIVER AT WHITEFISH 97,000 LEGEND 0.2% ANNUAL CHANCE FLOOD 1% ANNUAL CHANCE FLOOD 2% ANNUAL CHANCE FLOOD 10% ANNUAL CHANCE FLOOD STREAM BED CROSS SECTION LOCATION 99,000 101,000 102,000 59P 2990 2995 2985 3000 3005 2985 3005 3010 3015 4% ANNUAL CHANCE FLOOD N 3020 100,000 94,000 93,000 O P Q S V W X 3010 3015 3020 103,000 104,000 105,000 106,000 Y Z AA AD AE AC AB U T R JP ROAD FOOTBRIDGE COLUMBIA AVENUE 3 CULVERTS AT SPOKANE AVENUE TOP OF ROAD ELEVATION 3029.8 ---PAGE BREAK--- 2990 2995 3000 111,000 108,000 109,000 ELEVATION IN FEET (NAVD) STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH STILLWATER RIVER FEDERAL EMERGENCY MANAGEMENT AGENCY FLATHEAD COUNTY, MT AND INCORPORATED AREAS FLOOD PROFILES WHITEFISH RIVER AT WHITEFISH 110,000 LEGEND 0.2% ANNUAL CHANCE FLOOD 1% ANNUAL CHANCE FLOOD 2% ANNUAL CHANCE FLOOD 10% ANNUAL CHANCE FLOOD STREAM BED CROSS SECTION LOCATION 112,000 114,000 115,000 60P 2990 2995 3000 3005 2985 3005 3010 3015 3020 113,000 107,000 106,000 3010 3015 3020 116,000 117,000 118,000 119,000 AH AI AJ AK AL AP AO AN AM AQ AR AT AS AV AU AG AF BAKER AVENUE FOOTBRIDGE U.S. HIGHWAY 93 SECOND STREET BURLINGTON NORTHERN RAILROAD TOP OF ROAD ELEVATION 3040.2 CONFLUENCE WITH WHITEFISH LAKE ---PAGE BREAK--- 2905 2910 2915 2000 [PHONE REDACTED] ELEVATION IN FEET (NAVD) STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH STILLWATER RIVER FEDERAL EMERGENCY MANAGEMENT AGENCY FLATHEAD COUNTY, MT AND INCORPORATED AREAS FLOOD PROFILES WHITEFISH RIVER NEAR KALISPELL 1600 LEGEND 0.2% ANNUAL CHANCE FLOOD 1% ANNUAL CHANCE FLOOD 2% ANNUAL CHANCE FLOOD 10% ANNUAL CHANCE FLOOD STREAM BED CROSS SECTION LOCATION 2400 2800 3200 4400 3600 4000 4800 61P 5200 0 2910 2915 2905 2920 2920 D E A B C 2900 2900 2925 2925 2930 2930 4% ANNUAL CHANCE FLOOD PRIVATE DRIVE WESTWOOD LANE RAILROAD CROSSING FLOODING CONTROLLED BY STILLWATER RIVER CONFLUENCE WITH STILLWATER RIVER ---PAGE BREAK--- 2910 2915 2920 7200 5600 6000 6400 ELEVATION IN FEET (NAVD) STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH STILLWATER RIVER FEDERAL EMERGENCY MANAGEMENT AGENCY FLOOD PROFILES WHITEFISH RIVER NEAR KALISPELL 6800 7600 8000 8400 9600 8800 9200 10,000 62P 10,400 5200 2915 2920 2910 I K F G H 2905 2905 J 2925 2925 2930 2930 2900 2900 LEGEND 0.2% ANNUAL CHANCE FLOOD 1% ANNUAL CHANCE FLOOD 2% ANNUAL CHANCE FLOOD 10% ANNUAL CHANCE FLOOD STREAM BED CROSS SECTION LOCATION 4% ANNUAL CHANCE FLOOD FLATHEAD COUNTY, MT AND INCORPORATED AREAS WEST EVERGREEN DRIVE ---PAGE BREAK--- 2910 2915 2920 12,400 10,800 11,200 11,600 ELEVATION IN FEET (NAVD) STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH STILLWATER RIVER FEDERAL EMERGENCY MANAGEMENT AGENCY FLOOD PROFILES WHITEFISH RIVER NEAR KALISPELL 12,000 12,800 13,200 13,600 14,000 14,400 63P 10,400 2915 2920 2910 O L M N 2905 2905 2930 2930 2925 2925 LEGEND 0.2% ANNUAL CHANCE FLOOD 1% ANNUAL CHANCE FLOOD 2% ANNUAL CHANCE FLOOD 10% ANNUAL CHANCE FLOOD STREAM BED CROSS SECTION LOCATION 4% ANNUAL CHANCE FLOOD FLATHEAD COUNTY, MT AND INCORPORATED AREAS P 14,800 15,200 15,600 WEST RESERVE DRIVE ---PAGE BREAK--- 2910 2915 2920 17,600 16,000 16,400 16,800 ELEVATION IN FEET (NAVD) STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH STILLWATER RIVER FEDERAL EMERGENCY MANAGEMENT AGENCY FLOOD PROFILES WHITEFISH RIVER NEAR KALISPELL 17,200 18,000 18,400 18,800 19,200 19,600 64P 15,600 2915 2920 2910 R Q 2905 2905 2925 2925 LEGEND 0.2% ANNUAL CHANCE FLOOD 1% ANNUAL CHANCE FLOOD 2% ANNUAL CHANCE FLOOD 10% ANNUAL CHANCE FLOOD STREAM BED CROSS SECTION LOCATION FLATHEAD COUNTY, MT AND INCORPORATED AREAS 20,000 20,400 20,800 ---PAGE BREAK--- 2915 2920 2925 22,800 21,200 21,600 22,000 ELEVATION IN FEET (NAVD) STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH STILLWATER RIVER FEDERAL EMERGENCY MANAGEMENT AGENCY FLOOD PROFILES WHITEFISH RIVER NEAR KALISPELL 22,400 23,200 23,600 24,000 24,400 24,800 65P 20,800 2920 2925 2915 2910 2910 2930 2930 LEGEND 0.2% ANNUAL CHANCE FLOOD 1% ANNUAL CHANCE FLOOD 2% ANNUAL CHANCE FLOOD 10% ANNUAL CHANCE FLOOD STREAM BED CROSS SECTION LOCATION FLATHEAD COUNTY, MT AND INCORPORATED AREAS 25,200 25,600 26,000 S ---PAGE BREAK--- 2920 2925 2930 28,000 26,400 26,800 27,200 ELEVATION IN FEET (NAVD) STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH STILLWATER RIVER FEDERAL EMERGENCY MANAGEMENT AGENCY FLOOD PROFILES WHITEFISH RIVER NEAR KALISPELL 27,600 28,400 28,800 29,200 29,600 30,000 66P 26,000 2925 2930 2920 T W 2915 2915 2935 2935 LEGEND 0.2% ANNUAL CHANCE FLOOD 1% ANNUAL CHANCE FLOOD 2% ANNUAL CHANCE FLOOD 10% ANNUAL CHANCE FLOOD STREAM BED CROSS SECTION LOCATION FLATHEAD COUNTY, MT AND INCORPORATED AREAS 30,400 30,800 31,200 2940 2940 U V ROSE CROSSING ---PAGE BREAK--- 2930 2935 2940 33,200 31,600 32,000 32,400 ELEVATION IN FEET (NAVD) STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH STILLWATER RIVER FEDERAL EMERGENCY MANAGEMENT AGENCY FLOOD PROFILES WHITEFISH RIVER NEAR KALISPELL 32,800 33,600 34,000 34,400 34,800 35,200 67P 31,200 2935 2940 2930 X 2925 2925 2945 2945 LEGEND 0.2% ANNUAL CHANCE FLOOD 1% ANNUAL CHANCE FLOOD 2% ANNUAL CHANCE FLOOD 10% ANNUAL CHANCE FLOOD STREAM BED CROSS SECTION LOCATION FLATHEAD COUNTY, MT AND INCORPORATED AREAS 35,600 36,000 36,400 Y ---PAGE BREAK--- 2940 2945 2950 38,400 36,800 37,200 37,600 ELEVATION IN FEET (NAVD) STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH STILLWATER RIVER FEDERAL EMERGENCY MANAGEMENT AGENCY FLOOD PROFILES WHITEFISH RIVER NEAR KALISPELL 38,000 38,800 39,200 39,600 40,000 40,400 68P 36,400 2945 2950 2940 Z 2935 2935 2955 2955 LEGEND 0.2% ANNUAL CHANCE FLOOD 1% ANNUAL CHANCE FLOOD 2% ANNUAL CHANCE FLOOD 10% ANNUAL CHANCE FLOOD STREAM BED CROSS SECTION LOCATION FLATHEAD COUNTY, MT AND INCORPORATED AREAS 40,800 41,200 41,600 ---PAGE BREAK--- 2945 2950 2955 43,600 42,000 42,400 42,800 ELEVATION IN FEET (NAVD) STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH STILLWATER RIVER FEDERAL EMERGENCY MANAGEMENT AGENCY FLOOD PROFILES WHITEFISH RIVER NEAR KALISPELL 43,200 44,000 69P 41,600 2950 2955 2945 AA AD 2940 2940 LEGEND 0.2% ANNUAL CHANCE FLOOD 1% ANNUAL CHANCE FLOOD 2% ANNUAL CHANCE FLOOD 10% ANNUAL CHANCE FLOOD STREAM BED CROSS SECTION LOCATION FLATHEAD COUNTY, MT AND INCORPORATED AREAS AB AC 2960 2960 2965 2965 BIRCH GROVE ROAD LIMIT OF DETAILED STUDY