SAN JOAQUIN COUNTY, CALIFORNIA, AND INCORPORATED AREAS VOLUME 3 OF 4

Transcription

1 SAN JOAQUIN COUNTY, CALIFORNIA, AND INCORPORATED AREAS VOLUME 3 OF 4 Community Name Community Number *ESCALON, CITY OF LATHROP, CITY OF LODI, CITY OF MANTECA, CITY OF RIPON, CITY OF SAN JOAQUIN COUNTY (UNINCORPORATED AREAS) STOCKTON, CITY OF TRACY, CITY OF * Non Flood-Prone Community OCTOBER 16, 2009 Federal Emergency Management Agency FLOOD INSURANCE STUDY NUMBER 06077CV003A

2 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) may not contain all data available within the repository. It is advisable to contact the community repository for any additional data. Selected Flood Insurance Rate Map panels for the community contain information that was previously shown separately on the corresponding Flood Boundary and Floodway Map panels (e.g., floodways, cross-sections). Former flood hazard zone designations have been changed as follows: Old Zone A1 through A30 B C New Zone AE X X Part or all of this FIS may be revised and republished at any time. In addition, part of this FIS may be revised by the Letter of Map Revision process, which does not involve republication or redistribution of the FIS. It is, therefore, the responsibility of the user to consult with community officials and to check the community repository to obtain the most current FIS components. Initial Countywide FIS Effective Date: October 16, 2009

3 TABLE OF CONTENTS Volume 1 Page 1.0 INTRODUCTION Purpose of Study Authority and Acknowledgments Coordination AREA STUDIED Scope of Study Community Description Principal Flood Problems Flood Protection Measures ENGINEERING METHODS Hydrologic Analyses Hydraulic Analyses Vertical Datum...70 TABLES Table 1 Initial and Final CCO Dates...7 Table 2a - 2b Flooding Sources Studied by Detailed Methods...7 Table 3 Letter of Map Change...9 Table 4 Tributary Drainage Areas...16 Table 5a - 5b Frequencies of Past Floods...21 Table 6 Dams and Reservoirs of the Mokelumne Basin...25 Table 7a - 7d Storage Projects Affecting Flood Flows in San Joaquin County...27 Table 8 Summary of Elevations...37 Table 9a - 9c Stream Gaging Stations...37 Table 10 Summary of Discharges...45 Table 11 Tide Gaging Stations...52 Table 12 List of Levees Requiring Flood Hazard Revision...71 Table 13a - 13b Vertical Datum Conversions...74 i

4 TABLE OF CONTENTS (Continued) Volume FLOODPLAIN MANAGEMENT APPLICATIONS Floodplain Boundaries Floodways INSURANCE APPLICATIONS FLOOD INSURANCE RATE MAP OTHER STUDIES LOCATION OF DATA BIBLIOGRAPHY AND REFERENCES FIGURES Figure 1 Floodway Schematic...80 TABLES (Continued) Table 14 Floodway Data Tables...82 Table 15 Community Map History ii

5 TABLE OF CONTENTS (Continued) Volume 3 EXHIBITS Exhibit 1 Flood Profiles Bear Creek Calaveras River Corral Hollow Creek Dry Creek Duck Creek French Camp Slough Grant Line & Fabian & Bell Canal Jahant Slough Lone Tree Creek Middle River Mokelumne River Panels 01P-03P Panels 04P-13P Panels 14P-18P Panels 19P-20P Panels 21P-28P Panels 29P-31P Panels 32P-33P Panels 34P-35P Panels 36P-42P Panels 43P-45P Panels 46P-62P Volume 4 EXHIBITS (Continued) Mormon Channel Panels 63P-65P Mosher Creek Panels 66P-68P North Fork Mokelumne River downstream of SF Mokelumne River Panels 69P-71P North Fork Mokelumne River upstream of SF Mokelumne River Panel 72P North Fork South Littlejohns Creek Panels 73P-75P Old River Panels 76P-79P Paradise Cut Panels 80P-81P San Joaquin River Panels 82P-97P South Fork Mokelumne River Panels 98P 99P South Fork South Littlejohns, South Littlejohns, and Littlejohns Creek Panels 100P-107 Stanislaus River Panels 108P-113P Temple Creek Panels 114P-118P Walker Slough Panel 119P Exhibit 2 Flood Insurance Rate Map Index Flood Insurance Rate Map iii

6 KETTLEMAN LANE LIMIT OF DETAILED STUDY NOTE: THE 0.2%, 2% and 10% ANNUAL CHANCE FLOOD DATA NOT AVAILABLE 01P BEAR CREEK

7 NOTE: THE 0.2%, 2% and 10% ANNUAL CHANCE FLOOD DATA NOT AVAILABLE JACK TONE ROAD 02P BEAR CREEK

8 NOTE: THE 0.2%, 2% and 10% ANNUAL CHANCE FLOOD DATA NOT AVAILABLE LIMIT OF DETAILED STUDY 03P BEAR CREEK

9 1% ANNUAL CHANCE FLOOD CONTAINED IN CHANNEL SOLARI RANCH ROAD LIMIT OF DETAILED STUDY DIVERSION STRUCTURE AZ BA BB BC BD ASHLEY LANE 04P CALAVERAS RIVER

10 BE BF BG BH BI BJ BK BL ALPINE ROAD PEZZI ROAD BM PRIVATE ROAD DIVERSION STRUCTURE BN BO BP PRIVATE ROAD DIVERSION STRUCTURE 05P CALAVERAS RIVER

11 BQ BR BS BT BU BV BW BX BY STATE HIGHWAY 88 BZ CA CB EIGHTMILE ROAD DIVERSION STRUCTURE 06P CALAVERAS RIVER

12 CC CD CE CF CG CH CI CJ CK CL JACK TONE ROAD PRIVATE ROAD CM CN CO 07P CALAVERAS RIVER

13 TULLY ROAD CP CQ CR CS CT CU CV CW CX DIVERSION STRUCTURE PRIVATE ROAD PRIVATE ROAD CY CZ DA PRIVATE ROAD MESSICK ROAD 08P CALAVERAS RIVER

14 DIVERSION FROM MOSHER CREEK PRIVATE DRIVE NOTE: THE 1% AND 0.2% FLOOD ELEVATIONS ARE COINCIDENT DK DL DM DB DC DD DE DF DG DH DI DJ PRIVATE DRIVE PRIVATE DRIVE CLEMENTS ROAD DIVERSION STRUCTURE DIVERSION TO MOSHER CREEK PRIVATE ROAD 09P CALAVERAS RIVER

15 DN DO DP DQ DR DS DT DU DV DW DEMARTINI LANE PRIVATE ROAD DX DY PRIVATE ROAD DZ 10P CALAVERAS RIVER

16 DZ EA EB EC ED EE PRIVATE ROAD PRIVATE ROAD ESCALON BELLOTA ROAD DIVERSION STRUCTURE CONFLUENCE WITH MORMON SLOUGH NOTE: THE 2% ANNUAL CHANCE FLOOD PROFILE IS TOO CLOSE TO THE 1% ANNUAL CHANCE FLOOD ELEVATION TO BE SHOWN SEPARATELY EF EG 11P CALAVERAS RIVER

17 NOTE: THE 2% ANNUAL CHANCE FLOOD PROFILE IS TOO CLOSE TO THE 1% ANNUAL CHANCE FLOOD ELEVATION TO BE SHOWN SEPARATELY EH EI EJ EK EL LOW WATER CROSSING UNNAMED ROAD EM EN 12P CALAVERAS RIVER

18 NOTE: THE 2% ANNUAL CHANCE FLOOD PROFILE IS TOO CLOSE TO THE 1% ANNUAL CHANCE FLOOD ELEVATION TO BE SHOWN SEPARATELY SHELTON ROAD COUNTY BOUNDARY CALAVERAS RIVER EO EP EQ ER ES ET EU 13P

19 A B C D E LIMIT OF DETAILED STUDY NOTE: THE 2%, 1% AND 0.2% FLOOD ELEVATIONS ARE COINCIDENT CHRISMAN ROAD F G MCARTHUR DRIVE 14P CORRAL HOLLOW CREEK

20 NOTE: THE 2%, 1% AND 0.2% FLOOD ELEVATIONS ARE COINCIDENT H I J K L DIVERSION STRUCTURE PRIVATE ROAD PRIVATE ROAD PRIVATE ROAD DELTA - MENDOTA CANAL TRACY BOULEVARD PRIVATE ROAD M PIPE CROSSING PRIVATE ROAD UNION PACIFIC RAILROAD 15P CORRAL HOLLOW CREEK

21 N O P Q R CALIFORNIA AQUEDUCT INTERSTATE HIGHWAY 580 INTERSTATE HIGHWAY 580 S T 16P CORRAL HOLLOW CREEK

22 U V W X Y CORRAL HOLLOW ROAD Z 17P CORRAL HOLLOW CREEK

23 AA AB CORRAL HOLLOW ROAD LIMIT OF DETAILED STUDY 18P CORRAL HOLLOW CREEK

24 A B C D E F G H I J K LIMIT OF DETAILED STUDY SOUTHERN PACIFIC RAILROAD L M N O P LOWER SACRAMENTO ROAD 19P DRY CREEK

25 Q R S T U V STATE HIGHWAY 99 STATE HIGHWAY 99 LIMIT OF DETAILED STUDY 20P DRY CREEK

26 CONFLUENCE WITH WALKER SLOUGH H I J COUNTY BOUNDARY B STREET K L M POCK LANE 21P DUCK CREEK

27 N O P Q U V STATE HIGHWAY 99 FRONTAGE ROAD FRONTAGE ROAD CONFLUENCE OF BRANCH CREEK MARIPOSA ROAD COUNTY BOUNDARY COUNTY BOUNDARY ATCHISON, TOPEKA AND SANTA FE RAILROAD W X PRIVATE DRIVE LOW WATER CROSSING 22P DUCK CREEK

28 Y Z AA AB AC AD AE AF DIVERSION STRUCTURE LOW WATER CROSSING LOW WATER CROSSING LOW WATER CROSSING LOW WATER CROSSING PRIVATE ROAD FARMINGTON ROAD (STATE HWY 4) LOW WATER CROSSING AG AH AI PRIVATE ROAD 23P DUCK CREEK

29 AJ AK AL AM AN AO AP AQ AR AS PANELLA ROAD IRRIGATION PIPELINE JACK TONE ROAD LOW WATER CROSSING AT AU AV 24P DUCK CREEK

30 AX AY AZ BA BB BC BD BE LOW WATER CROSSING IRRIGATION PIPELINE DIVERSION STRUCTURE HOLLENBECK ROAD LOW WATER CROSSING BF BG BH BI LOW WATER CROSSING LOW WATER CROSSING DIVERSION STRUCTURE BJ 25P DUCK CREEK

31 BK BL BM BN BO BP BQ BR BS LOW WATER CROSSING DRAIS ROAD DIVERSION STRUCTURE LOW WATER CROSSING LOW WATER CROSSING LOW WATER CROSSING BT BU LOW WATER CROSSING BV 26P DUCK CREEK

32 BW BX BY BZ CA CB CC CD CE HEWITT ROAD PRIVATE ROAD CF CG CH LOW WATER CROSSING DIVISERSION STRUCTURE 27P DUCK CREEK

33 CI CJ CK CL CM CN CO CP CQ PRIVATE DRIVE LOW WATER CROSSING LOW WATER CROSSING LOW WATER CROSSING SOUTHERN PACIFIC RAILROAD LOW WATER CROSSING ESCALON-BELLOTA ROAD CR DUCK CREEK DIVERSION STRUCTURE LIMIT OF DETAILED STUDY 28P DUCK CREEK

34 CONFLUENCE WITH SAN JOAQUIN RIVER LIMIT OF DETAILED STUDY A B C D E F G H I J CONFLUENCE OF WALKER SLOUGH 1% ANNUAL CHANCE BACKWATER FROM SAN JOAQUIN RIVER K L M N MANTHEY ROAD INTERSTATE HIGHWAY 5 INTERSTATE HIGHWAY 5 29P FRENCH CAMP SLOUGH

35 O P Q R S T U V W CONFLUENCE OF NORTH LITTLEJOHNS CREEK EL DORADO STREET SOUTHERN PACIFIC RAILROAD MCKINLEY AVENUE 1% ANNUAL CHANCE BACKWATER FROM SAN JOAQUIN RIVER UNION PACIFIC RAILROAD IRRIGATION PIPELINE X Y Z IRRIGATION PIPELINE 30P FRENCH CAMP SLOUGH

36 AA NOTE: THE 0.2% ANNUAL CHANCE FLOOD PROFILE IS TOO CLOSE TO THE 1% ANNUAL CHANCE FLOOD ELEVATION TO BE SHOWN SEPARATELY AB AC AD AE AF AG AH AI AIRPORT WAY TIDEWATER SOUTHERN RAILROAD PRIVATE ROAD LIMIT OF DETAILED STUDY CONFLUENCE OF NORTH AND SOUTH FORKS SOUTH LITTLEJOHNS CREEK 31P FRENCH CAMP SLOUGH

37 CONFLUENCE WITH OLD RIVER LIMIT OF DETAILED STUDY NOTE: THE 0.2% AND 2% ANNUAL CHANCE FLOODS DATA AND STREAM BED DATA NOT AVAILABLE 32P GRANT LINE CANAL AND FABI AN AND BELL CANAL

38 NOTE: THE 0.2% AND 2% ANNUAL CHANCE FLOODS DATA AND STREAM BED DATA NOT AVAILABLE TRACY BOULEVARD CONFLUENCE OF PARADISE CUT 33P GRANT LINE CANAL AND FABI AN AND BELL CANAL

39 A B C D E F G H I J K LOWER LIMIT OF SACRAMENTO ROAD DETAILED STUDY UNION PACIFIC RAILROAD L M WOODSON ROAD 34P JAHANT SLOUGH

40 N O P Q R S LIMIT OF DETAILED STUDY STATE HIGHWAY 99 NORTH CHEROKEE LANE 35P JAHANT SLOUGH

41 CONFLUENCE WITH SOUTH FORK LITTLE JOHNS CREEK LIMIT OF DETAILED STUDY NOTE: THE 2% ANNUAL CHANCE FLOOD PROFILE IS TOO CLOSE TO THE 1% ANNUAL CHANCE FLOOD ELEVATION TO BE SHOWN SEPARATELY NOTE: THE 2% ANNUAL CHANCE FLOOD PROFILE IS TOO CLOSE TO THE 1% ANNUAL CHANCE FLOOD ELEVATION TO BE SHOWN SEPARATELY L M N A B C D E F G H I J K IRRIGATION PIPELINE PRIVATE DRIVE DIVERSION STRUCTURE PRIVATE DRIVE DIVERSION STRUCTURE STATE HIGHWAY 99 PRIVATE DRIVE PRIVATE DRIVE DIVERSION STRUCTURE (NOT IN USE) PRIVATE DRIVE 36P LONE TREE CREEK

42 NOTE: THE 2% ANNUAL CHANCE FLOOD PROFILE IS TOO CLOSE TO THE 1% ANNUAL CHANCE FLOOD ELEVATION TO BE SHOWN SEPARATELY O P Q R S T U V W X Y AUSTIN ROAD OLD BRIDGE (NOT IN USE) OLD BRIDGE (NOT IN USE) IRRIGATION PIPELINE DIVERSION STRUCTURE CONFLUENCE OF TEMPLE CREEK Z AA 37P LONE TREE CREEK

43 AB AC AD AE AF AG AH AI AJ AK PIPELINE PRIVATE DRIVE DIVERSION STRUCTURE PRIVATE DRIVE DIVERSION STRUCTURE JACK TONE ROAD DIVERSION STRUCTURE PRIVATE ROAD NOTE: THE 10% ANNUAL CHANCE FLOOD PROFILE IS TOO CLOSE TO THE 2% ANNUAL CHANCE FLOOD ELEVATION TO BE SHOWN SEPARATELY AL AM DIVERSION STRUCTURE PRIVATE ROAD 38P LONE TREE CREEK

44 NOTE: THE 10% ANNUAL CHANCE FLOOD PROFILE IS TOO CLOSE TO THE 2% ANNUAL CHANCE FLOOD ELEVATION TO BE SHOWN SEPARATELY AN AO AP AQ AR AS AT AU AV AW AX SANDBAG DAM PRIVATE ROAD MURPHY ROAD OLD BRIDGE (NOT IN USE) IRRIGATION PIPELINE IRRIGATION PIPELINE FOOTBRIDGE PRIVATE DRIVE OLD BRIDGE (NOT IN USE) AY AZ DIVERSION STRUCTURE PRIVATE DRIVE 39P LONE TREE CREEK

45 NOTE: THE 10% ANNUAL CHANCE FLOOD PROFILE IS TOO CLOSE TO THE 2% ANNUAL CHANCE FLOOD ELEVATION TO BE SHOWN SEPARATELY BA BB BC BD BE BF BG BH BI BJ LONE TREE ROAD PRIVATE ROAD OLD BRIDGE (NOT IN USE) CARROLTON ROAD PRIVATE DRIVE PIPELINE BK BL BM PRIVATE DRIVE DIVERSION STRUCTURE VAN ALLEN ROAD 40P LONE TREE CREEK

46 NOTE: THE 10% ANNUAL CHANCE FLOOD PROFILE IS TOO CLOSE TO THE 2% ANNUAL CHANCE FLOOD ELEVATION TO BE SHOWN SEPARATELY BN BO BP BQ BR BS BT BU BV BW BX IRRIGATION PIPELINE PRIVATE ROAD DIVERSION STRUCTURE ATCHISON, TOPEKA AND SANTA FE RAILROAD SEXTON ROAD CATTLE CROSSING CATTLE CROSSING PRIVATE ROAD BY BZ 41P LONE TREE CREEK

47 CA CB CC CD CE CF CG CH BRENNAN ROAD LIMIT OF DETAILED STUDY DIVERSION STRUCTURE ESCALON-BELLOTA ROAD 42P LONE TREE CREEK

48 CONFLUENCE WITH NORTH CANAL NOTE: THE 0.2% AND 2% ANNUAL CHANCE FLOODS DATA AND STREAM DATA NOT AVAILABLE TRACY BOULEVARD 43P MIDDLE RIVER

49 HOWARD ROAD UNDINE ROAD NOTE: THE 0.2% AND 2% ANNUAL CHANCE FLOODS DATA AND STREAM DATA NOT AVAILABLE 44P MIDDLE RIVER

50 NOTE: THE 0.2% AND 2% ANNUAL CHANCE FLOODS DATA AND STREAM DATA NOT AVAILABLE TIDE GAGE 25 UNDINE ROAD CONFLUENCE OF OLD RIVER LIMIT OF DETAILED STUDY 45P MIDDLE RIVER

51 A B C D E F G LIMIT OF DETAILED STUDY NEW HOPE ROAD H I J 46P MOKELUMNE RIVER

52 K L M N O P Q R 47P MOKELUMNE RIVER

53 S T U V W X Y Z AA 48P MOKELUMNE RIVER

54 AB AC AD AE AF AG PELTIER ROAD AH 49P MOKELUMNE RIVER

55 AI AJ AK AL AM AN AO 50P MOKELUMNE RIVER

56 AP AQ AR AS AT LOWER SACRAMENTO ROAD WOODBRIDGE IRRIGATION DIVERSION DAM AU 51P MOKELUMNE RIVER

57 AV AW AX AY AZ UNION PACIFIC RAILROAD BA BB 52P MOKELUMNE RIVER

58 BC BD BE BF BG STATE HIGHWAY 99 CENTRAL CALIFORNIA TRACTION COMPANY RAILROAD BH BI 53P MOKELUMNE RIVER

59 BJ BK BL BM 54P MOKELUMNE RIVER

60 BN BO BRUELLA ROAD 55P MOKELUMNE RIVER

61 BP BQ BR BS BT 56P MOKELUMNE RIVER

62 BU BV BW BX BY BZ CA ELLIOT ROAD 57P MOKELUMNE RIVER

63 CB CC CD CE CF CG CH 58P MOKELUMNE RIVER

64 CI CJ CK CL CM CN CO CP 59P MOKELUMNE RIVER

65 CQ CR CS CT CU CV MACKVILLE ROAD CW CX CY STATE HIGHWAY 88 60P MOKELUMNE RIVER

66 CZ DA DB DC DD DE DF 61P MOKELUMNE RIVER

67 DG CAMANCHE DAM LIMIT OF DETAILED STUDY 62P MOKELUMNE RIVER