VOLUME 2 OF 4 Cobb County COBB COUNTY, GEORGIA COMMUNITY NAME COMMUNITY NUMBER ACWORTH, CITY OF 130053 AUSTELL, CITY OF 130054 COBB COUNTY 130052 (UNINCORPORATED AREAS) KENNESAW, CITY OF 130055 MARIETTA, CITY OF 130226 POWDER SPRINGS, CITY OF 130056 SMYRNA, CITY OF 130057 REVISED: MARCH 4, 2013 FLOOD INSURANCE STUDY NUMBER 13067CV002D
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 Effective Date: August 18, 1992 Revised Countywide FIS Effective Date: December 16, 2008 Revised Countywide FIS Effective Date: March 4, 2013
TABLE OF CONTENTS Page 1.0 INTRODUCTION 1 1.1 Purpose of Study 1 1.2 Authority and Acknowledgments 1 1.3 Coordination 3 2.0 AREA STUDIED 5 2.1 Scope of Study 5 2.2 Community Description 10 2.3 Principal Flood Problems 10 2.4 Flood Protection Measures 11 3.0 ENGINEERING METHODS 12 3.1 Hydrologic Analyses 13 3.2 Hydraulic Analyses 42 3.3 Vertical Datum 48 4.0 FLOODPLAIN MANAGEMENT APPLICATIONS 49 4.1 Floodplain Boundaries 49 4.2 Floodways 50 5.0 INSURANCE APPLICATIONS 107 6.0 FLOOD INSURANCE RATE MAP 109 7.0 OTHER STUDIES 109 8.0 LOCATION OF DATA 111 9.0 BIBLIOGRAPHY AND REFERENCES 111 i
TABLE OF CONTENTS - VOLUME I Page FIGURES Figure 1 Floodway Schematic 107 TABLES Table 1 Redelineated Streams 8-9 Table 2 Summary of Discharges 20-41 Table 3 Summary of Stillwater Elevations 42 Table 4 Manning s n Values 45-47 Table 5 Vertical Datum Conversion 48 Table 6 Floodway Data 52-106 Table 7 Community Map History 110 TABLE OF CONTENTS - VOLUME II EXHIBITS Exhibit 1 - Flood Profiles Allatoona Branch Allatoona Creek Bishop Creek Blackjack Creek Butler Creek Buttermilk Creek Campground Creek Chattahoochee River Clay Branch Concord Creek Cooper Lake Creek Davis Branch Due West Creek Eastside Creek Elizabeth Branch Favor Creek Florence Branch Gilmore Creek Gordon Branch Panel 01P Panels 02P-12P Panels 13P-14P Panels 15P-16P Panels 17P-22P Panels 23P-26P Panels 27P-28P Panels 29P-33P Panels 34P-35P Panels 36P-37P Panels 38P-39P Panel 40P Panels 41P-43P Panel 44P Panels 45P-46P Panels 47P-48P Panels 49P-50P Panel 51P Panel 52P ii
TABLE OF CONTENTS - VOLUME II - continued EXHIBITS - continued Exhibit 1 - Flood Profiles - continued Gordon Creek Gothards Creek Harmony Grove Creek Hope Creek Laurel Creek Liberty Hill Branch Little Allatoona Creek Little Noonday Creek Lost Mountain Creek Luther Ward Branch Panels 53P-54P Panels 55P-56P Panels 57P-58P Panels 59P-60P Panels 61P-64P Panels 65P-67P Panels 68P-71P Panels 72P-75P Panel 76P Panels 77P-79P TABLE OF CONTENTS - VOLUME III EXHIBITS - continued Exhibit 1 - Flood Profiles - continued Milam Branch Mill Creek No.1 Mill Creek No.2 Morgan Lake Tributary Mud Creek Nickajack Creek Noonday Creek Noonday Creek Tributary No. 1 Noonday Creek Tributary No. 3 Noonday Creek Tributary No. 4 Noonday Creek Tributary No. 6 Noonday Creek Tributary No. 7 Noses Creek Olley Creek Olley Creek Tributary Pine Branch Pine Creek Piney Grove Creek Pitner Creek Poorhouse Creek Poplar Creek Powder Springs Creek Powers Branch Panels 80P-82P Panels 83P-84P Panels 85P-86P Panel 87P Panels 88P-94P Panels 95P-100P Panels 101P-110P Panel 111P Panels 112P-114P Panels 115P-117P Panels 118P Panels 119P-120P Panels 121P-132P Panels 133P-137P Panel 138P Panel 139P Panels 140P-141P Panels 142P-145P Panels 146P-147P Panels 148P-149P Panels 150P-151P Panels 152P-158P Panels 159P-160P iii
TABLE OF CONTENTS - VOLUME IV EXHIBITS - continued Exhibit 1 - Flood Profiles - continued Powers Creek Proctor Creek Queen Creek Robertson Creek Rottenwood Creek Rubes Creek Rubes Creek Tributary Sewell Mill Creek Smyrna Branch Sope Branch Sope Creek Sweat Mountain Creek Sweetwater Creek Tanyard Creek Tate Creek Terrell Branch Theater Branch Thompson Creek Timber Ridge Branch Trickum Creek Trickum Creek Tributary Vinings Branch Ward Creek Westside Branch Wildhorse Creek Wildwood Branch Willeo Creek Panel 161P Panel 162P-164P Panels 165P-169P Panels 170P-171P Panels 172P-177P Panels 178P-181P Panel 182P Panels 183P-188P Panels 189P-190P Panel 191P Panels 192P-201P Panels 202P-203P Panels 204P-206P Panels 207P-210P Panels 211P-212P Panels 213P-214P Panels 215P-216P Panel 217P Panel 218P Panels 219P-221P Panels 222P-223P Panel 224P Panels 225P-229P Panel 230P Panels 231P-232P Panel 233P Panels 234P-236P Exhibit 2 - Flood Insurance Rate Map Index Flood Insurance Rate Map iv
ALLATOONA BRANCH 1040 1040 FLOODING CONTROLLED BY ALLATOONA CREEK 1030 1030 1020 1020 1010 1010 1000 1000 990 990 980 980 970 970 960 A B C D 950 0 500 1000 1500 2000 2500 3000 3500 4000 4500 5000 5500 6000 6500 STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH ALLATOONA CREEK 01P HOLLAND ROAD CONFLUENCE WITH ALLATOONA CREEK LIMIT OF DETAILED STUDY
960 960 1% ANNUAL CHANCE BACKWATER EFFECTS FROM LAKE ALLATOONA (BACKWATER EFFECTS FOR 10%, 2%, AND UNKNOWN) 940 940 920 920 900 900 CONFLUENCE WITH LAKE ALLATOONA COBB PKWY 880 880 861.1 FT BACKWATER 860 860 ALLATOONA CREEK 840 840 820 820 800 A B C 780 0 500 1000 1500 2000 2500 3000 3500 4000 4500 5000 5500 6000 6500 STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH LAKE ALLATOONA D 02P
960 960 1% ANNUAL CHANCE BACKWATER EFFECTS FROM LAKE ALLATOONA (BACKWATER EFFECTS FOR 10%, 2%, AND UNKNOWN) 940 940 920 920 900 900 880 880 861.1 FT BACKWATER 860 860 CONFLUENCE WITH LITTLE ALLATOONA CREEK ALLATOONA CREEK 840 840 820 820 800 E F 780 6500 7000 7500 8000 8500 9000 9500 10000 10500 11000 11500 12000 12500 13000 STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH LAKE ALLATOONA G 03P
960 960 1% ANNUAL CHANCE BACKWATER EFFECTS FROM LAKE ALLATOONA (BACKWATER EFFECTS FOR 10%, 2%, AND UNKNOWN) 940 940 920 920 900 900 COUNTY LINE RD ALLATOONA CREEK 880 880 861.1 FT BACKWATER 860 860 840 840 820 820 800 H I 780 13000 13500 14000 14500 15000 15500 16000 16500 17000 17500 18000 18500 19000 19500 STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH LAKE ALLATOONA J K L 04P
980 980 960 960 MARS HILL RD 940 940 920 920 ALLATOONA CREEK 900 900 880 880 860 860 840 840 820 M N O 800 19500 20000 20500 21000 21500 22000 22500 23000 23500 24000 24500 25000 25500 26000 STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH LAKE ALLATOONA P 05P
980 980 960 960 940 940 920 920 ALLATOONA CREEK 900 900 880 880 860 860 840 840 820 Q R S T 800 26000 26500 27000 27500 28000 28500 29000 29500 30000 30500 31000 31500 32000 32500 STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH LAKE ALLATOONA 06P
ALLATOONA CREEK 1000 1000 980 980 960 960 940 940 920 920 900 900 880 880 860 860 840 820 32500 33000 33500 34000 34500 35000 35500 36000 36500 37000 37500 38000 38500 39000 STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH LAKE ALLATOONA 07P STILESBORO RD CONFLUENCE WITH DUE WEST CREEK HADAWAY RD Y Z U V W X
1020 1020 1000 1000 980 980 960 960 KENTUCKY SADDLER CT BURNT HICKORY RD ALLATOONA CREEK 940 940 920 920 900 900 880 880 860 AA 840 39000 39500 40000 40500 41000 41500 42000 42500 43000 43500 44000 44500 45000 45500 STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH LAKE ALLATOONA AB AC AD 08P
1040 1040 1020 1020 1000 1000 980 980 DUE WEST RD ALLATOONA CREEK 960 960 940 940 920 920 900 900 880 AE AF AG 860 45500 46000 46500 47000 47500 48000 48500 49000 49500 50000 50500 51000 51500 52000 STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH LAKE ALLATOONA AH AI 09P
ALLATOONA CREEK 1060 1060 1040 1040 1020 1020 1000 1000 980 980 960 960 940 940 920 920 900 880 52000 52500 53000 53500 54000 54500 55000 55500 56000 56500 57000 57500 58000 58500 STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH LAKE ALLATOONA 10P MARS HILL RD OLD MOUNTAIN RD CONFLUENCE WITH ALLATOONA BRANCH AN AM AO AJ AK AL
1120 1120 1100 1100 HERMITAGE DR 1080 1080 1060 1060 HERMITAGE DR ALLATOONA CREEK 1040 1040 1020 1020 1000 1000 980 980 960 AP AQ AR 940 58500 59000 59500 60000 60500 61000 61500 62000 62500 63000 63500 64000 64500 65000 STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH LAKE ALLATOONA AS 11P
1200 1200 1180 1180 1160 1140 1160 1140 ALLATOONA CREEK 1120 1100 1080 1060 1040 HOLLAND RD AT LIMIT OF DETAILED STUDY AU 1020 63500 64000 64500 65000 65500 66000 66500 67000 67500 68000 68500 69000 69500 70000 70500 STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH LAKE ALLATOONA 1120 1100 1080 1060 12P
910 910 1% ANNUAL CHANCE BACKWATER EFFECT FROM LAKE ALLATOONA (BACKWATER EFFECTS FOR 10%, 2%, AND UNKNOWN) 900 900 CONFLUENCE WITH LAKE ACWORTH NANCE RD 890 890 880 880 BUTLER CREEK 870 870 861.1 FT BACKWATER 860 860 850 850 840 840 830 820 0 500 1000 1500 2000 2500 3000 3500 4000 4500 5000 5500 6000 6500 STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH LAKE ACWORTH A B C 17P
BUTLER CREEK 920 920 910 910 900 900 890 890 880 880 870 870 860 860 850 850 840 830 6500 7000 7500 8000 8500 9000 9500 10000 10500 11000 11500 12000 12500 13000 STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH LAKE ACWORTH 18P ACWORTH CITY LIMIT ACWORTH CITY LIMIT ACWORTH CITY LIMIT COBB PKWY PRIVATE DRIVE M N F G H I J K L
950 950 940 940 930 930 JIM OWENS RD 920 920 BUTLER CREEK 910 910 900 900 890 890 880 880 870 O P Q R S 860 13000 13500 14000 14500 15000 15500 16000 16500 17000 17500 18000 18500 19000 19500 STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH LAKE ACWORTH T U 19P
BUTLER CREEK 990 990 980 980 970 970 960 960 950 950 940 940 930 930 920 920 910 900 19500 20000 20500 21000 21500 22000 22500 23000 23500 24000 24500 25000 25500 26000 STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH LAKE ACWORTH 20P KENNESAW CITY LIMIT KENNESAW CITY LIMIT MACK DOBBS RD AA AB V W X Y Z
BUTLER CREEK 1020 1020 1010 1010 1000 1000 990 990 980 980 970 970 960 960 AH AI 950 950 940 AC AD AE AF AG 930 26000 26500 27000 27500 28000 28500 29000 29500 30000 30500 31000 31500 32000 32500 STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH LAKE ACWORTH 21P KENNESAW CITY LIMIT BUTLER BRIDGE WAY KENNESAW CITY LIMIT KENNESAW CITY LIMIT KENNESAW CITY LIMIT KENNESAW CITY LIMIT KENNESAW CITY LIMIT
BUTLER CREEK 1060 1060 1050 1050 1040 1040 1030 1030 1020 1020 1010 1010 1000 1000 990 990 980 AJ AK AL AM AN 970 32500 33000 33500 34000 34500 35000 35500 36000 36500 37000 37500 38000 38500 39000 STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH LAKE ACWORTH 22P PINE MOUNTAIN RD BUTLER CREEK RD BLACK GUM DR SUMIT WOOD DR KENNESAW CITY LIMIT LIMIT OF DETAILED STUDY
930 930 FLOODING CONTROLLED BY SWEETWATER CREEK 1% ANNUAL CHANCE BACKWATER EFFECTS FROM SWEETWATER CREEK 920 920 CONFLUENCE WITH SWEETWATER CREEK MAXHAM ROAD SOUTHWEST / STATE HIGHWAY 5 910 910 900 900 BUTTERMILK CREEK 890 890 880 880 870 870 860 860 850 A B 840 0 500 1000 1500 2000 2500 3000 3500 4000 4500 5000 5500 6000 6500 STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH SWEETWATER CREEK C * * DATA NOT AVAILABLE 23P
CHATTAHOOCHEE RIVER 840 840 820 820 800 800 780 780 760 760 740 740 720 720 CJ CK CL 700 700 680 CD CE CF CG CH 660 90.50 91.00 91.50 92.00 92.50 93.00 93.50 94.00 94.50 95.00 95.50 96.00 96.50 97.00 STREAM DISTANCE IN MILES FROM WEST POINT DAM 29P LIMIT OF FLOODING AFFECTING COMUNITY COUNTY BOUNDARY INTERSTATE 20 MARTIN LUTHER KING JR. DRIVE CONFLUENCE OF NICKAJACK CREEK BANKHEAD HIGHWAY CI
CHATTAHOOCHEE RIVER 860 860 840 840 820 820 800 800 780 780 760 760 740 740 DC DB CZ DA 720 720 700 CW CP CV CM CN CO CQ CR CS CT CU CX CY 680 97.00 97.50 98.00 98.50 99.00 99.50 100.00 100.50 101.00 101.50 102.00 102.50 103.00 103.50 STREAM DISTANCE IN MILES FROM WEST POINT DAM 30P INTERSTATE ROUTE 285 NORFOLK SOUTHERN RAILWAY JAMES JACKSON PARKWAY NW NORFOLK SOUTHERN PAILWAY SPUR RAILROAD MARRIETTA BOULVARD NW CSX TRANSPORTATION (RAILROAD) CHECKDAM CONFLUENCE OF VINIGNS BRANCH PACES FERRY ROAD NW
CHATTAHOOCHEE RIVER 880 880 860 860 840 840 820 820 800 800 780 780 760 760 DV DW 740 740 720 DM DH DL DE DD DF DG DI DJ DK DN DO DP DQ DR DS DT DU 700 103.50 104.00 104.50 105.00 105.50 106.00 106.50 107.00 107.50 108.00 108.50 109.00 109.50 110.00 STREAM DISTANCE IN MILES FROM WEST POINT DAM 31P COBB PARKWAY (US ROUTE 41) INTERSTATE 75 CONFLUENCE OF ROTTENWOOD CREEK POWERS FERRY ROAD INTERSTATE 285 CONFLUENCE OF SOPE CREEK INTERSTATE NORTH EXPRESSWAY
CHATTAHOOCHEE RIVER 920 920 900 900 880 880 860 860 840 840 820 820 800 800 780 780 760 DY EB DX DZ EA EC ED EE 740 110.00 110.50 111.00 111.50 112.00 112.50 113.00 113.50 114.00 114.50 115.00 115.50 116.00 116.50 STREAM DISTANCE IN MILES FROM WEST POINT DAM 32P JOHNSON FERRY ROAD MORGAN FALLS DAM CONFLUENCE OF WILLEO CREEK COUNTY BOUNDARY
CONCORD CREEK 1020 1020 1% ANNUAL CHANCE BACKWATER EFFECT FROM NICKAJACK CREEK 1000 1000 980 980 960 960 940 940 920 920 900 900 I 880 880 860 B F A C D E G H 840 0 400 800 1200 1600 2000 2400 2800 3200 3600 4000 4400 4800 5200 STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH NICKAJACK CREEK 35P CONFLUENCE WITH NICKAJACK CREEK COVERED BRIDGED ROAD SOUTH HURT ROAD HILL HOUSE ROAD
1060 1060 EAST WEST CONNECTOR 1040 1040 PRIVATE ROAD 1020 1020 1000 1000 HICKS ROAD PRIVATE ROAD AULDYN DRIVE CONCORD CREEK 980 980 960 960 940 940 920 920 900 J K L M N O P Q R S 880 5000 5400 5800 6200 6600 7000 7400 7800 8200 8600 9000 9400 9800 10200 STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH NICKAJACK CREEK T U V 36P
1120 1120 1100 1100 AULDYN DRIVE LIMIT OF DETAILED STUDY 1080 1080 1060 1060 CONCORD CREEK 1040 1040 1020 1020 1000 1000 980 980 960 U V W X 940 9000 9400 9800 10200 10600 11000 11400 11800 12200 12600 13000 13400 13800 14200 STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH NICKAJACK CREEK 37P
COOPER LAKE CREEK 890 890 1% ANNUAL BACKWATER EFFECTS FROM NICKAJACK CREEK 880 880 870 870 860 860 850 850 840 840 830 830 I 820 820 810 F A B C D E G H 800 0 500 1000 1500 2000 2500 3000 3500 4000 4500 5000 5500 6000 6500 STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH NICKAJACK CREEK 38P CONFLUENCE WITH NICKAJACK CREEK COOPER LAKE ROAD EAST-WEST CONNECTOR DERBY LANE SOUTHEAST CSX TRANSPORTATION
COBB COUNTY, GA COOPER LAKE CREEK 930 930 920 920 910 910 900 900 890 890 880 880 870 870 860 860 850 K N J L M 840 5500 6000 6500 7000 7500 8000 8500 9000 9500 10000 10500 11000 11500 12000 STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH NICKAJACK CREEK 39P REED ROAD SOUTHEAST GANN ROAD SOUTHEAST LIMIT OF DETATAILED STUDY
950 950 1% ANNUAL CHANCE BACKWATER EFFECTS FROM ALLATOONA CREEK 940 940 930 930 920 920 CONFLUENCE WITH ALLATOONA CREEK HADAWAY RD 910 910 900 900 DUE WEST CREEK 890 890 880 880 870 A B C D E F 860 0 500 1000 1500 2000 2500 3000 3500 4000 4500 5000 5500 6000 6500 STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH ALLATOONA CREEK ACWORTH DUE WEST RD G 41P
1000 1000 990 990 PAUL SAMUEL RD 980 980 970 970 DUE WEST CREEK 960 960 950 950 940 940 930 930 920 H I J K L 910 6500 7000 7500 8000 8500 9000 9500 10000 10500 11000 11500 12000 12500 13000 STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH ALLATOONA CREEK 42P
1040 1040 1030 1030 1020 1020 LIMIT OF DETAILED STUDY 1010 1010 1000 1000 990 990 DUE WEST CREEK 980 980 970 970 960 950 11500 12000 12500 M N O 13000 13500 14000 14500 15000 15500 16000 16500 17000 17500 18000 STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH ALLATOONA CREEK 43P
FAVOR CREEK 970 970 1% ANNUAL CHANCE BACKWATER EFFECTS FROM NICKAJACK CREEK 960 960 950 950 940 940 930 930 920 920 910 910 900 900 890 D F I A B C E G H 880 0 500 1000 1500 2000 2500 3000 3500 4000 4500 5000 5500 6000 6500 STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH NICKAJACK CREEK 47P CHURCH ROAD SOUTHWEST CHURCH ROAD RESERVE SMYRNA POWDER SPRINGS ROAD SOUTHWEST
FAVOR CREEK 1020 1020 1010 1010 1000 1000 990 990 980 980 970 970 960 960 950 950 940 J K 930 6500 7000 7500 8000 8500 9000 9500 10000 10500 11000 11500 12000 12500 13000 STREAM DISTANCE IN FEET ABOVE CONFELUNCE WITH NICKAJACK CREEK 48P APARTMENT DRIVEWAY LIMIT OF DETAIED STUDY L
GILMORE CREEK 800 800 FLOODING CONTROLLED BY CHATTAHOOCHEE RIVER 1% ANNUAL CHANCE BACKWATER EFFECTS FROM CHATTAHOOCHEE RIVER 790 790 780 780 770 770 760 760 750 750 740 740 730 730 720 A B C 710 0 500 1000 1500 2000 2500 3000 3500 4000 4500 5000 5500 6000 6500 STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH CHATTAHOOCHEE RIVER 51P LIMIT OF DETAILED STUDY PARK CIRCLE WOODLAND BROOK DRIVE NORTHWEST NORTH ELIZABETH LANE NORTHWEST CONFLUENCE WITH CHATTAHOOCHEE RIVER
950 950 1% ANNUAL CHANCE BACKWATER EFFECTS FROM SWEETWATER CREEK 940 940 CONFLUENCE WITH SWEETWATER CREEK 930 930 920 920 STOUT PKWY BRIDGE GOTHARDS CREEK 910 910 900 900 890 890 880 880 870 860 0 500 1000 1500 2000 2500 3000 3500 4000 4500 5000 5500 6000 6500 STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH SWEETWATER CREEK A 55P
950 950 1% ANNUAL CHANCE BACKWATER EFFECTS FROM SWEETWATER CREEK 940 940 930 930 920 920 COUNTY BOUNDARY GOTHARDS CREEK 910 910 900 900 890 890 880 880 870 B 860 6500 7000 7500 8000 8500 9000 9500 10000 10500 11000 11500 12000 12500 13000 STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH SWEETWATER CREEK C 56P
HARMONY GROVE CREEK 1020 1020 1000 1000 980 980 960 960 940 940 920 920 900 900 R P Q 880 880 D E F 860 C B H K M O A G I J L N 840 0 500 1000 1500 2000 2500 3000 3500 4000 4500 5000 5500 6000 6500 STREAM DISTANCE IN FEET ABOVE CONFELUNCE WITH WILLEO CREEK 57P CONFELENCE WITH WILLEO CREEK PRIVATE DRIVE PRIVATE DRIVE DAM LONG LAKE DRIVE PRIVATE DRIVE POST OAK TRITT RD MOUNTAIN TRCE MOUNTAIN CREEK DR
HARMONY GROVE CREEK 1100 1100 1080 1080 1060 1060 1040 1040 1020 1020 1000 1000 980 980 960 960 940 W S T U V X Y 920 6500 7000 7500 8000 8500 9000 9500 10000 10500 11000 11500 12000 12500 13000 STREAM DISTANCE IN FEET ABOVE CONFELUNCE WITH WILLEO CREEK 58P MOUNTAIN CREEK DR JOHNSON FERRY RD ZLIMIT OF DETAILED STUDY
LAUREL CREEK 920 920 900 900 880 880 860 860 840 840 820 820 800 800 780 780 760 740 0 500 1000 1500 2000 2500 3000 3500 4000 4500 5000 5500 6000 6500 STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH NICKAJACK CREEK 61P EAST-WEST CONNECTOR 1% ANNUAL CHANCE BACKWATER EFFECTS FROM NICKAJACK CREEK CONFLUENCE WITH NICKAJACK CREEK NORFOLK SOUTHERN RAILWAY HIGHLANDS PARKWAY LAUREL BRIDGE DRIVE SOUTHEAST I J CSX TRANSPORTATION A B C D E F G H
LAUREL CREEK 980 980 960 960 940 940 920 920 900 900 880 880 860 860 840 840 N R S 820 M L Q K O P 800 6500 7000 7500 8000 8500 9000 9500 10000 10500 11000 11500 12000 12500 13000 STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH NICKAJACK CREEK 62P COOPER LAKE ROAD LAUREL LAKE DAM RYNE PARK COBB DRIVE
LAUREL CREEK 1020 1020 1000 1000 980 980 960 960 940 940 920 920 900 900 880 880 860 AA W Z AD T U V X Y AB AC 840 13000 13500 14000 14500 15000 15500 16000 16500 17000 17500 18000 18500 19000 19500 STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH NICKAJACK CREEK 63P DRAWBRIDGE ROAD ASHWOOD DRIVE HICKORY CIRCLE
LAUREL CREEK 1100 1100 1080 1080 1060 1060 1040 1040 1020 1020 1000 1000 980 980 960 960 940 AF AH AE AG 920 18000 18500 19000 19500 20000 20500 21000 21500 22000 22500 23000 23500 24000 24500 STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH NICKAJACK CREEK 64P LIMIT OF DETAILED STUDY FOREST DRIVE SOUTHEAST LEE STREET SOUTHEAST
LIBERTY HILL BRANCH 830 830 1% CHANCE ANNUAL BACKWATER EFFECTS FROM QUEEN CREEK 820 820 810 810 800 800 790 790 780 780 770 770 I 760 760 750 A B C D E F G H 740 0 200 400 600 800 1000 1200 1400 1600 1800 2000 2200 2400 2600 STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH QUEEN CREEK 65P CONFLUENCE WITH QUEEN CREEK MONARCH VALLEY WALK QUEENS MILL ROAD SOUTHEAST BRICKLERIDGE LANE
LIBERTY HILL BRANCH 880 880 870 870 860 860 850 850 840 840 830 830 820 820 810 810 800 790 2400 2600 2800 3000 3200 3400 3600 3800 4000 4200 4400 4600 4800 5000 STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH QUEEN CREEK 66P HICKORY TRAIL SOUTHEAST J K
LIBERTY HILL BRANCH 920 920 910 910 900 900 890 890 880 880 870 870 860 860 850 850 840 830 3600 3800 4000 4200 4400 4600 4800 5000 5200 5400 5600 5800 6000 6200 STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH QUEEN CREEK 67P BLACKHAWK TRAIL SOUTHEAST LIMIT OF DETAILED STUDY L M N O
900 900 1% ANNUAL CHANCE BACKWATER EFFECT FROM LAKE ALLATOONA BACKWATER EFFECS FOR 10%, 2%, AND UNKNOWN 890 890 880 880 CONFLUENCE WITH ALLATOONA CREEK 870 870 861.1 FT BACKWATER 860 860 850 850 OLD STILESBORO RD LITTLE ALLATOONA CREEK 840 840 830 830 820 A B C D 810 0 500 1000 1500 2000 2500 3000 3500 4000 4500 5000 5500 6000 6500 STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH ALLATOONA CREEK E 68P
910 910 900 900 PITNER RD 890 890 880 880 870 870 860 860 UNKNOWN RD LITTLE ALLATOONA CREEK 850 850 840 840 830 F G H 820 6500 7000 7500 8000 8500 9000 9500 10000 10500 11000 11500 12000 12500 13000 STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH ALLATOONA CREEK I J 69P
LITTLE ALLATOONA CREEK 930 930 920 920 910 910 900 900 890 890 880 880 870 870 860 860 850 840 13000 13500 14000 14500 15000 15500 16000 16500 17000 17500 18000 18500 19000 19500 STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH ALLATOONA CREEK 70P COLLINS RD PITNER CREEK CONFLUENCE WITH BURNT HICKORY RD K L M N O
LITTLE ALLATOONA CREEK 970 970 960 960 950 950 940 940 930 930 920 920 910 910 900 900 890 880 19500 20000 20500 21000 21500 22000 22500 23000 23500 24000 24500 25000 25500 26000 STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH ALLATOONA CREEK 71P FERNSTONE DR DAM LIMIT OF DETAILED STUDY P Q
950 950 CONFLUENCE WITH NOONDAY CREEK 1% ANNUAL CHANCE BACKWATER EFFECTS FROM NOONDAY CREEK 940 940 930 930 920 920 910 910 900 900 CANTON ROAD UNNAMED ROAD LITTLE NOONDAY CREEK 890 890 880 880 870 A B C D 860 0 500 1000 1500 2000 2500 3000 3500 4000 4500 5000 5500 6000 6500 STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH NOONDAY CREEK E F 72P
970 970 960 960 950 950 940 940 930 930 920 920 BLACKWELL RD WORLEY DR LITTLE NOONDAY CREEK 910 910 900 900 890 G H I J 880 6500 7000 7500 8000 8500 9000 9500 10000 10500 11000 11500 12000 12500 13000 STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH NOONDAY CREEK K L 73P
LITTLE NOONDAY CREEK 990 990 980 980 970 970 960 960 950 950 940 940 930 930 920 920 910 900 13000 13500 14000 14500 15000 15500 16000 16500 17000 17500 18000 18500 19000 19500 STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH NOONDAY CREEK 74P RAIL ROAD CONFLUENCE WITH MORGAN LAKE TRIBUTARY PIEDMONT RD Q R M N O P
1020 1020 1010 1010 1000 1000 990 990 980 980 970 970 960 960 950 950 940 LIBERTY HILL RD S T U V W 930 19500 20000 20500 21000 21500 22000 22500 23000 23500 24000 24500 25000 25500 26000 STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH NOONDAY CREEK LIMIT OF DETAILED STUDY LITTLE NOONDAY CREEK 75P
LOST MOUNTAIN CREEK 960 960 1% ANNUAL CHANCE BACKWATER EFFECTS FROM WILDHORSE CREEK 950 950 940 940 930 930 920 920 910 910 900 900 F 890 890 880 A B C D 870 0 500 1000 1500 2000 2500 3000 3500 4000 4500 5000 5500 6000 6500 STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH WILDHORSE CREEK 76P CONFLUENCE WITH WILDHORSE CREEK LIMIT OF DETALED STUDY FOREST HILL ROAD SOUTHWEST MACEDONIA ROAD SOUTHWEST E
950 950 1% ANNUAL CHANCE BACKWATER EFFECTS FROM MUD CREEK 945 945 940 940 935 935 930 930 CONFLUENCE WITH MUD CREEK 925 925 LUTHER WARD BRANCH 920 920 915 915 910 A B C 905 0 500 1000 1500 2000 2500 3000 3500 4000 4500 5000 5500 6000 6500 STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH MUD CREEK D 77P
965 965 960 960 CASTEEL RD VILLA RICA RD BULLARD RD 955 955 950 950 945 945 940 940 LUTHER WARD BRANCH 935 935 930 930 925 E F G H 920 6500 7000 7500 8000 8500 9000 9500 10000 10500 11000 11500 12000 12500 13000 STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH MUD CREEK I 78P
LUTHER WARD BRANCH 980 980 975 975 970 970 J LUTHER WARD RD 965 965 960 960 955 955 950 K 935 12500 13000 13500 14000 14500 15000 15500 16000 16500 17000 17500 18000 18500 19000 STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH MUD CREEK 79P LIMIT OF DETAILED STUDY 950 945 945 940