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Home My WebLink About20240409_Hydrologic_&_Hydraulic_Analysis HYDROLOGIC AND HYDRAULIC ANALYSIS TECHNICAL REPORT FORNEY CREEK STREAM RELOCATION AND RESTORATION STANLEY, LINCOLN COUNTY, NC Prepared For: HEDRICK INDUSTRIES Prepared By: CIVIL & ENVIRONMENTAL CONSULTANTS, INC. CHARLOTTE,NC CEC Project 183-802 JANUARY 2023 REVISED: JULY 2023 REVISED: JANUARY 2024 RECEIVED APR 0 u 20T, LAND QUALITY SECTION AV AV All :/AiriIA7 Civil & Environmental Consultants, Inc. 3701 Arco Corporate Drive,Suite 400 1 Charlotte,NC 28273 1 p:980-237-0373 f:980-237-0372 1 www.cecinc.com TABLE OF CONTENTS 1.0 INTRODUCTION..............................................................................................................1 2.0 PROJECT DESCRIPTION..............................................................................................1 3.0 AVAILABLE DATA.........................................................................................................1 4.0 REGULATIONS AND REQUIREMENTS ....................................................................2 5.0 HYDROLOGY...................................................................................................................3 6.0 EFFECTIVE MODEL.......................................................................................................3 7.0 DUPLICATE EFFECTIVE MODEL..............................................................................3 8.0 CORRECTED EFFECTIVE MODEL............................................................................4 9.0 EXISTING CONDITIONS MODEL...............................................................................5 10.0 PROPOSED CONDITIONS MODEL.............................................................................5 11.0 SEDIMENT TRANSPORT MODELING.......................................................................7 12.0 CONCLUSION..................................................................................................................8 13.0 LIMITATIONS AND EXPECTATIONS........................................................................9 APPENDICES APPENDIX A-LOCATION MAP APPENDIX B-FEMA FIS AND FIRM EXCERPTS APPENDIX C-TOPOGRAPHIC WORK MAP AND ANNOTATED FIRMS APPENDIX D-PROJECT PLANS APPENDIX E-CROSS-SECTION PLOTS APPENDIX F-HYDRAULIC ANALYSIS RESULTS APPENDIX G-STRUCTURES EXHIBITS Civil & Environmental Consultants, Inc. Forney Creek Stream Relocation Hydrologic and Hydraulic Technical Report January 2023 Revised:July 2023 Revised:January 2024 1.0 INTRODUCTION This hydrologic and hydraulic analysis technical report has been prepared for Hedrick Industries to present the results of the hydrologic and hydraulic engineering analysis for the proposed stream relocation and restoration of Forney Creek adjacent to the Lake Norman Quarry from River Mile 0.23 to River Mile 0.8.The Lake Norman Quarry is located on 6941 Quarry Lane,Stanley,Lincoln County, NC. A location map for the project is included in Appendix A. The.results of this hydrologic and hydraulic engineering analysis are in support of a Conditional Letter of Map Revision(CLOMR)for the proposed stream relocation and restoration. 2.0 PROJECT DESCRIPTION The subject property is included in the Federal Emergency Management Agency's(FEMA)Flood Insurance Study (FIS) for Lincoln County,North Carolina and Incorporated Areas (FIS Number 37109CV000)with a revised date of March 18,2008 and is shown on the FEMA Federal Insurance Rate Maps (FIRMS) Number 3710369100J and 3710369200J, both with an effective date of August 16, 2007. The FIRM shows a portion of the subject property is located in a Special Flood Hazard Area(SFHA)designation Zone "AE"for Forney Creek. Zone "AE"is an area where the base flood elevations (1% Annual Chance of Flood) have been determined. A portion of the subject property is also located in the regulatory floodway for Forney Creek. The proposed grading eliminates a portion of the effective floodway and relocates it based on the proposed stream alignment, and therefore, requires a hydrologic and hydraulic engineering analysis to be completed. Appendix B contains excerpts of the Lincoln County FIS and FIRMS. 3.0 AVAILABLE DATA CEC obtained the hydraulic model for Forney Creek which supports the effective FIS for Lincoln County, North Carolina, with a revised date of March 18, 2008 from the North Carolina Flood Civil & Environmental Consultants, Inc. -1- Forney Creek Stream Relocation Hydrologic and Hydraulic Technical Report January 2023 Revised:July 2023 Revised:January 2024 Risk Information System website. The supporting hydraulic model is a HEC-RAS computer model for Forney Creek from River Mile 0.05 to River Mile 7.28. CEC conducted field survey of Forney Creek,the surrounding floodplain,and the existing culvert crossing. For the extended floodplain areas,the field survey was supplemented with LiDAR data downloaded from the North Carolina's Spatial Data Download (https:Hsdd.nc.gov/). The LiDAR data for Lincoln County was acquired in 2016 as part of Phase 4 of the QL2/QLI LiDAR Collection program. This topographic elevation data is currently the best available topographic data since it is the most recent topographic elevation data collected for the Forney Creek floodplain. 4.0 REGULATIONS AND REQUIREMENTS The proposed stream relocation on the subject property is located in a FEMA Zone "AE"with a designated floodway for Forney Creek. Chapter 151, Section 59 of the Lincoln County Flood Damage Prevention Ordinance applies to this project. "No encroachments, including fill, new construction, substantial improvements, and other developments shall be permitted unless: (a) It is demonstrated that the proposed encroachment would not result in any increase in the flood levels during the occurrence of the base flood, based on hydrologic and hydraulic analyses performed in accordance with standard engineering practice and presented to the F000dplain Administrator prior to issuance offloodplain development permit; or (b) A Conditional Letter of Map Revision (CLOMR) has been approved by FEMA. A Letter of Map Revisions (LOMR) must also be obtained upon completion of the proposed encroachment." The proposed grading on the subject property includes cut and fill within the regulatory floodway, therefore a hydrologic and hydraulic analysis is required. The hydrologic and hydraulic analysis Civil & Environmental Consultants, Inc. -2- Forney Creek Stream Relocation Hydrologic and Hydraulic Technical Report January 2023 Revised:July 2023 Revised:January 2024 and subsequent reporting was prepared in accordance with FEMA's "Instructions for Completing the Application Forms for Conditional Letters of Map Revision and Letters of Map Revision". 5.0 HYDROLOGY A hydrologic analysis for Forney Creels watershed was not part of this study since the floodway encroachment would not alter how the peak flows had been determined in the FIS. The steady state flows contained in the hydraulic model which supports the effective FIS that were used for this analysis. 6.0 EFFECTIVE MODEL The hydraulic model for Forney Creek which supports the effective FIS is the basis for the hydraulic analysis for this project. The supporting effective hydraulic model is a HEC-RAS computer model for Forney Creek from River Mile 0.05 to River Mile 7.28. This model is the basis for the hydraulic analysis for this project. The methodology used in the supporting hydraulic models was evaluated so modifications made to the hydraulic model for this analysis would be made using the same methodology used to develop the effective model. 7.0 DUPLICATE EFFECTIVE MODEL The hydraulic model which supports the effective FIS for Forney Creek was evaluated using the USACE HEC-RAS (v. 5.0.7) computer model. This evaluation was conducted to ensure that the supporting model's input data had been transferred correctly and results could be reproduced.This ensures that updates and revisions for the existing and proposed conditions can be integrated into the model. The results generated for the Duplicate Effective Model using the HEC-RAS (v 5.0.7) are consistent with the data published in the Lincoln County effective FIS and effective FIRM, dated March 18,2008 and August 16, 2007,respectively. Civil & Environmental Consultants. Inc. -3- Forney Creek Stream Relocation Hydrologic and Hydraulic Technical Report January 2023 Revised:July 2023 Revised:January 2024 The hydraulic analysis results are included in Appendix F. 8.0 CORRECTED EFFECTIVE MODEL The Corrected Effective Model was developed based on the Duplicate Effective Model. The alignment of Forney Creek and reach lengths were corrected to reflect the surveyed conditions of the stream for RS4397 through RS955. The geometry was updated based on the best available topographic information using survey and LiDAR data for RS 4397 through RS 1226.The data for the existing culvert and weir located at RS 1540 and RS4162, respectively,was updated to reflect the surveyed condition. Blocked obstructions were added to RS1692 and RS3951 based on their alignment in relation to the surveyed stream channel. The left descending overbank of RS1692 is located within the surveyed stream channel, a blocked obstruction was added up to the adjacent floodplain elevation, so the downstream conveyance of the left overbank is not over calculated. Similarly,the right descending overbank of RS3951 is located within the surveyed stream channel, a blocked obstruction was added up to the adjacent floodplain elevation, so the downstream conveyance of the right overbank is not over calculated. Ineffective flow areas were modified or added to RS1514, 1555, 1596, 1692, 1745, 1822, and 1895. For RS1514 and 1555, ineffective flow areas were updated based on the survey data for the existing culvert.For RS 1514, 1596, 1692, 1745, 1822, and 1895, ineffective flow areas were added to represent areas along the FEMA effective cross-section alignments that would become inundated but would not actively convey flow. The bank stations were adjusted based on the survey data. The encroachment stations for RS1226, 3824, 3951, 4010, 4069, 4196, and 4397 were modified from the Duplicate Effective Model to keep the encroachment surcharge between 0-ft and 1-ft. More detailed information for the existing culvert is shown on Exhibit 1 included in Appendix G. The hydraulic analysis results are included in Appendix F. Civil & Environmental Consultants, Inc. 4- Forney Creek Stream Relocation Hydrologic and Hydraulic Technical Report January 2023 Revised:July 2023 Revised:January 2024 9.0 EXISTING CONDITIONS MODEL The Existing Conditions Model was developed based on the Corrected Effective Model. Cross- sections located between RS1307 and RS4296 were modified. The alignment of cross-sections was modified to extend to the location of the proposed realignment of Forney Creek and to cross the existing stream that was realigned in the Corrected Effective Model perpendicularly. Due to the sinuosity of the proposed stream alignment and distance from the existing alignment of Forney Creek, the cross-section locations were modified to provide more consistency in reach lengths along the proposed reach.This was done to allow for the existing conditions model to be compared to the proposed conditions model more effectively. After the cross-sections were realigned, the geometry was updated based on the best available topographic information using survey and LiDAR data. Manning's n values, bank stations, ineffective flow areas, reach lengths, and floodway encroachment stations were adjusted accordingly based on engineering judgement. Cross-sections located outside of the revision area were not modified from the corrected effective model to existing conditions. The inline weir located at RS4134 near the upstream portion of the project property was updated to reflect man-made changes that have occurred since the effective date of the FEMA model. The inline weir was realigned, and geometry was updated based on the survey data. The cross-section plots for the existing conditions model are included in Appendix E. The hydraulic analysis results are included in Appendix F. 10.0 PROPOSED CONDITIONS MODEL The Proposed Conditions Model was developed based on the Existing Conditions Model. The alignment and reach lengths of Forney Creek were updated to reflect the proposed realignment of Forney Creek based on proposed grading. The overall length of the reach was decreased by 160- feet between RS 1307 and RS4296 as a result of the proposed realignment. Cross-sections located outside of the revision area were not modified from existing conditions to proposed conditions. Civil & Environmental Consultants, Inc. -5- Forney Creek Stream Relocation Hydrologic and Hydraulic Technical Report January 2023 Revised:July 2023 Revised:January 2024 The geometry of the Existing Conditions Model was modified by incorporating the proposed grading for the stream realignment. The proposed site plans for the stream realignment are provided in Appendix D. The ineffective flow areas, manning's "n" values, expansion and contraction coefficients, blocked obstructions,reach lengths, and floodway encroachment stations were modified based on engineering judgment to reflect the proposed conditions. The existing bridge was removed, and a proposed bridge was added at RS1540. Increased contraction and expansion coefficients were used to represent the proposed bridge and headwalls. The existing inline weir was removed from the modeling, as it will be removed during construction. The cross-sections at RS4010, 1692, 1596, 1555, 1455, and 1393 were removed due to a lack of space between cross-sections for the new alignment of the stream in these areas. In addition, the cross-sections atRS3800, 1452.05,and 1398.04 were added to provide increased definition for the model near the proposed bridge and near the upstream portion of the project. Ineffective flow areas were removed from RS 1514, 1745, 1822, 1895, 2358, 2481, 2608, 3167, 3377, and 3591. The ineffective flow area was removed from RS 1514, to represent the removal of the existing culvert. The ineffective flow areas were removed from RS 1745, 1822, and 1895, based on the realignment of the cross-sections using guidance from the HEC-RAS Hydraulic Reference manual. The ineffective flaw areas were removed from RS 2358, 2481, 2608, 3167, 3377, and 3591, due to the realignment of the stream and associated grading of the floodplain to provide a continuous flow path for flood waters. Blocked obstructions were added to cross-sections 1745 through 3824 in the area of the existing stream. Based on the elevation of the adjacent haul road that is proposed between the proposed stream alignment and existing stream alignment, floodwaters would not be capable of flowing in the existing stream. In addition,blocked obstructions were added to cross-sections 4196 and 1514 to represent two areas beyond the floodplain embankment that will not be inundated by the 100- year or 500-year floodplain. Civil & Environmental Consultants, Inc. -6- Forney Creek Stream Relocation Hydrologic and Hydraulic Technical Report January 2023 Revised:July 2023 Revised:January 2024 Encroachment stations for the proposed floodway for cross-sections 1398.04 and 1452.05 are located within the proposed ineffective flow areas of the proposed bridge. Although this is not typically standard practice, the proposed bridge will be inundated during the 1% annual chance flood event and the ineffective flow areas will become effective. Based on the effective FIRM for the revision area the 0.2% annual chance floodplain appears to be equal with the 1% annual chance floodplain for FEMA cross-sections 003 through 029. There is also no established 0.2% annual chance floodplain for the downstream Killian Creek. The effective FIS report available for Lincoln County does not have a profile for Forney Creek to allow for a 0.2% annual chance floodplain elevation to be confirmed. Therefore, during the proposed mapping the proposed 0.2% annual chance floodplain line has been mapped to the downstream revised limits of this CLOMR. More detailed information for the layout and profile of the proposed bridge is shown on Figure 2 in Appendix G.Engineering Plans for the proposed bridge are included in Appendix D. A layout of the proposed bridge, realigned stream, and proposed cross-section locations are depicted on the topographic working map included in Appendix C. The cross-section plots for the proposed conditions model are included in Appendix E. The hydraulic analysis results are included in Appendix F. 11.0 SEDIMENT TRANSPORT MODELING Sediment transport modeling was not performed for the existing culvert or proposed bridge. The existing FEMA model did not include sediment transport modeling in the effective model. In r addition, the installation of the proposed span crossing will provide better opportunities for sediment transport than the existing round culvert. Civil & Environmental Consultants, Inc. -7- Forney Creek Stream Relocation Hydrologic and Hydraulic Technical Report January 2023 Revised:July 2023 Revised:January 2024 12.0 CONCLUSION The hydrologic and hydraulic analysis for the proposed stream relocation and restoration of Forney Creek adjacent to the Lake Norman Quarry shows the proposed project meets the regulatory requirements. The results of the analysis show there are increases and decreases to the 1% annual chance flood elevation throughout the model mostly occurring between RS 955 and RS 5915. The 1% annual chance floodplain, 0.2% annual chance floodplain, and the floodway have been remapped to represent proposed conditions. Based on the results of the analysis there are no structures affected by the increases of the BFE or modifications to the floodway. The Proposed Conditions Model establishes a revised floodway for Forney Creek within the project limits that does result in more than 1.0 feet of surcharge within the revision area.A list of parcels affected by the modifications to the floodplain and floodway is provided below in Table 2. The digital files for the Hydraulic Model will be submitted with this report. Table 1. Affected Parcel Owners Information Parcel Property Owner Mailing Parcel Physical ID Property Owner Name Address Address Hedrick Gravel and Sand Cc -Lake 6941 Quarry Lane,Stanley, 02862 Norman Branch NC 28164 Quarry Lane PO Box 1040, Salisbury, 52621 Hedrick Gravel and Sand Co Lessees NC 28145 Looking Glass Trail M34561 1936 Lee Road Winter 6947 Quarry Lane 02860 , Blythe Construction Co Park,FL 32789 Stardey,NC 28164 Lake Norman Landfill Inc.BFI C/O PO Box 29246,Phoenix, 7099 Quarry Lane 74884 Republic Services Inc. AZ 85038 Stanley,NC 28164 1600 W Broadway Rd, Lake Norman Community Association Suite 200,Tempe,AZ, 104347 Inc. 85282 Pier Drive 1600 W Broadway Rd, Lake Norman Community Association Suite 200,Tempe,AZ, 104348 Inc. 85282 Portside Lane Civil & Environmental Consultants, Inc. -8- Forney Creek Stream Relocation . Hydrologic and Hydraulic Technical Report January 2023 Revised:July 2023 Revised:January 2024 13.0 LIMITATIONS AND EXPECTATIONS The findings and opinions presented are relative to the dates of CEC's site survey and the referenced hydrologic and hydraulic data sets and should not be relied on to represent conditions at substantially later dates. The opinions included herein are based on information obtained during the study of CEC's experience. If additional information becomes available that might impact CEC's conclusions,CEC requests the opportunity to review the information,reassess the potential concerns, and modify CEC's opinions, if warranted. If our services included a review or use of documents or data sources prepared by others, CEC has no responsibility for accuracy of information contained therein. CEC has relied on the accuracy of models and calculations enclosed by the regulatory authorities. Their analyses are in general accordance with industry standards. CEC makes no warrants or representations as to the accuracy or quality of these methods. Civil & Environmental Consultants, Inc. -9- Forney Creek Stream Relocation Hydrologic and Hydraulic Technical Report January 2023 Revised:July 2023 Revised:January 2024 Table 2. Forney Creek 1%-Annual-Chance Water Surface Elevation Comparison. River Plan W.S. Vs. Effective Vs. Corrected Vs. Existing Station Elev. Model Effective Model Conditions Model 14603 DUP_Profile 688.9 14603 COR_Profile 688.9 0 14603 EXIST Profile 688.9 0 0 14603 PROP Profile 688.9 0 0 0 14401 DUP_Profile 688.3 14401 COR_Profile 688.3 0 14401 EXIST Profile 688.3 0 0 14401 PROP Profile 688.3 0 0 0 14141 DUP_Profile 687.61 14141 COR_Profile 687.61 0 14141 EXIST—Profile fl687.21 0 14141 PROP Profile 0 0 13841 DUP_Profile 13841 COR_Profile 13841 EXIST—Profile 0 13841 PROP Profile 1 0.01 0.01 13628 DUP_Profile 13628 CORProfile 013628 EXISTProfile . 0 0 13628 PROP Profile 686.23 0 0 0 13268 DUP_Profile 685.59 13268 COR_Profile 685.59 0 13268 EXIST_Profile 685.59 0 0 13268 PROP Profile 685.59 0 0 0 12900 DUP_Profile 684.65 12900 COR_Profile 684.64 -0.01 12900 EXIST—Profile 684.65 0 0.01 12900 PROP Profile 684.65 0 0.01 0 Civil & Environmental Consultants, Inc. -10- Forney Creek Stream Relocation Hydrologic and Hydraulic Technical Report January 2023 Revised:July 2023 Revised:January 2024 River Plan W.S. Vs. Effective Vs. Corrected Vs. Existing Station Elev. Model Effective Model Conditions Model 12683 DUP_Profile 684.4 12683 COR_Profile 684.39 -0.01 12683 EXIST Profile 684.4 0 0.01 12683 PROP Profile 684.4 0 0.01 0 12550 DUP_Profile 684.11 12550 COR_Profile 684.11 0 12550 EXIST Profile 684.12 0.01 0.01 12550 PROP Profile 684.12 0.01 0.01 0 12399 DUP_Profile 683.94 12399 COR_Profile 683.93 -0.01 12399 EXIST_Profile 683.94 0 0.01 12399 PROP Profile 683.94 0 0.01 0 12019 DUP_Profile 683.57 12019 COR_Profile 683.57 0 12019 EXIST Profile 683.58 0.01 0.01 12019 PROP Profile 683.58 0.01 0.01 0 11756 DUP_Profile 683.5 11756 COR_Profile 683.5 0 11756 EXIST Profile 683.51 0.01 0.01 11756 PROP Profile 683.51 0.01 0.01 0 11587 DUP_Profile 683.45 11587 COR_Profile 683.44 -0.01 11587 EXIST-Profile 683.45 0 0.01 11587 PROP Profile 683.46 0.01 0.02 0.01 11472 DUP_Profile 683.41 11472 COR_Profile 683.4 -0.01 11472 EXIST_Profile 683.41 0 0.01 11472 PROP Profile 683.42 0.01 0.02 0.01 11379 DUP_Profile 683.22 11379 COR Profile 683.22 0 Civil & Environmental Consultants, Inc. -11- Forney Creek Stream Relocation Hydrologic and Hydraulic Technical Report January 2023 Revised:July 2023 Revised:January 2024 River Plan W.S. Vs.Effective Vs. Corrected Vs. Existing Station Elev. Model Effective Model Conditions Model 11379 EXIST_Profile 683.23 0.01 0.01 11379 PROP Profile 683.23 0.01 0.01 0 11319 DUP_Profile 683.18 11319 COR_Profile 683.17 -0.01 11319 EXIST_Profile 683.18 0 0.01 11319 PROP Profile 683.19 0.01 0.02 0.01 11283 DUP_Profile 683.19 11283 COR_Profile 683.19 0 11283 EXIST Profile 683.2 0.01 0.01 11283 PROP Profile 683.21 0.02 0.02 0.01 11111 10927 DUP_Profile 679.68 10927 COR_Profile 679.68 0 10927 EXIST_Profile 679.69 0.01 0.01 10927 PROP Profile 679.69 0.01 0.01 0 10862 DUP_Profile 679.38 10862 COR_Profile 679.37 -0.01 10862 EXIST Profile 679.38 0 0.01 10862 PROP Profile 679.39 0.01 0.02 0.01 10693 DUP_Profile 679.1 10693 COR_Profile 679.1 0 10693 EXIST Profile 679.11 0.01 0.01 10693 PROP Profile 679.12 0.02 0.02 0.01 10522 DUP_Profile 678.98 10522 COR_Profile 678.97 -0.01 10522 EXIST-Profile 678.99 0.01 0.02 10522 PROP Profile 679 0.02 0.03 0.01 10304 DUP_Profile 678.58 10304 COR Profile 678.57 -0.01 Civil & Environmental Consultants, Inc. -12- Forney Creek Stream Relocation Hydrologic and Hydraulic Technical Report January 2023 Revised:July 2023 Revised:January 2024 River Plan W.S. Vs. Effective Vs. Corrected Vs. Existing Station Elev. Model Effective Model Conditions Model 10304 EXIST Profile 678.59 0.01 0.02 10304 PROP Profile 678.60 0.02 0.03 0.01 10131 DUP_Profile 678.39 10131 COR_Profile 678.38 -0.01 10131 EXIST Profile 678.4 0.01 0.02 10131 PROP Profile 678.42 0.03 0.04 0.02 9897 DUP_Profile 678.18 9897 COR_Profile 678.17 -0.01 9897 EXIST_Profile 678.19 0.01 0.02 9897 PROP Profile 678.21 0.03 0.04 0.02 9729 DUP_Profile 677.95 9729 COR_Profile 677.94 -0.01 9729 EXIST_Profile 677.96 0.01 0.02 9729 PROP Profile 677.98 0.03 0.04 0.02 9629 DUP_Profile 677.74 9629 COR_Profile 677.73 -0.01 9629 EXIST Profile 677.76 0.02 0.03 9629 PROP Profile 677.78 0.04 0.05 0.02 9576 DUP_Profile 677.71 9576 COR_Profile 677.7 -0.01 9576 EXIST_Profile 677.73 0.02 0.03 9576 PROP Profile 677.75 0.04 0.05 0.02 9536 DUP_Profile 677.51 9536 COR_Profile 677.5 -0.01 9536 EXIST Profile 677.53 0.02 0.03 9536 PROP Profile 677.54 0.03 0.04 0.01 9494 9452 DUP Profile 676.51 9452 COI Profile 676.5 -0.01 Civil & Environmental Consultants, Inc. -13- Forney Creek Stream Relocation Hydrologic and Hydraulic Technical Report January 2023 Revised:July 2023 Revised:January 2024 River Plan W.S. Vs.Effective Vs. Corrected Vs.Existing Station Elev. Model Effective Model Conditions Model 9452 EXIST_Profile 676.52 0.01 0.02 9452 PROP Profile 676.54 0.03 0.04 0.02 9418 DUP_Profile 676.3 9418 COR_Profile 676.28 -0.02 9418 EXIST_Profile 676.32 0.02 0.04 9418 PROP Profile 676.34 0.04 0.06 0.02 9328 DUP_Profile 676.31 9328 COR_Profile 676.3 -0.01 9328 EXIST_Profile 676.33 0.02 0.03 9328 PROP Profile 676.36 0.05 0.06 0.03 9257 DUP_Profile 676.12 9257 COR_Profile 676.1 -0.02 9257 EXIST Profile 676.15 0.03 0.05 9257 PROP Profile 676.17 0.05 0.07 0.02 9155 DUP_Profile 676.11 9155 COR_Profile 676.09 -0.02 P EXISTProfile 676.14 0.03 0.05 PROP Profile 676.16 0.05 0.07 0.02 DUP_Profile 675.8 COR_Profile 675.78 -0.02 EXIST Profile 675.83 0.03 0.05 8817 PROP Profile 675.86 0.06 0.08 0.03 8689 DUP_Profile 675.4 8689 COR_Profile 675.38 -0.02 8689 EXIST_Profile 675.44 0.04 0.06 8689 PROP Profile 675.47 0.07 0.09 0.03 8298 DUP_Profile 674.7 8298 COR_Profile 674.66 -0.04 jPROP8298 EXIST Profile 674.75 0.05 0.09 8298 Profile 674.8 0.1 0.14 0.05 Civil & Environmental Consultants, Inc. -14- Forney Creek Stream Relocation Hydrologic and Hydraulic Technical Report January 2023 Revised:July 2023 Revised:January 2024 River Plan W.S. Vs.Effective Vs. Corrected Vs.Existing Station Elev. Model Effective Model Conditions Model 8149 DUP_Profile 674.29 8149 COR_Profile 674.24 -0.05 8149 EXIST Profile 674.36 0.07 0.12 8149 PROP Profile 674.43 0.14 0.19 0.07 N DUP_Profile 674.2 COR_Profile 674.15 -0.05 EXISTProfile 674.27 0.07 0.12 PROP Profile 674.34 0.14 0.19 0.07 DUP_Profile 674.04 7790 COR_Profile 673.99 -0.05 7790 EXIST_Profile 674.12 0.08 0.13 7790 PROP Profile 674.19 0.15 0.2 0.07 7642 DUP_Profile 673.99 7642 COR_Profile 673.93 -0.05 7642 EXIST_Profile 674.07 0.08 0.13 7642 PROP Profile k73�. 0.16 0.21 0.08 7101 DUP_Profile 7101 COR_Profile -0.07 7101 EXIST-Profile 0.1 0.17 7101 PROPProfile 0.18 0.25 0.08 6844 DUP_Profile 673.41 6844 COR_Profile 673.33 -0.08 6844 EXIST_Profile 673.51 0.1 0.18 6844 PROP Profile 673.61 0.2 0.28 0.1 N6434 DUP_Profile M673O8 COR_Profile -0.09 EXIST Profile 0.11 0.2 PROP Profile 0.26 0.35 0.15 DUP Profile Civil & Environmental Consultants, Inc. -15- Forney Creek Stream Relocation Hydrologic and Hydraulic Technical Report January 2023 Revised:July 2023 Revised:January 2024 River Plan W.S. Vs.Effective Vs. Corrected Vs.Existing Station Elev. Model Effective Model Conditions Model 6224 COR_Profile 672.99 -0.09 6224 EXIST_Profile 673.2 0.12 0.21 6224 PROP Profile 673.31 0.23 0.32 0.11 6049 DUP_Profile 672.89 6049 COR_Profile 672.8 -0.09 6049 EXIST Profile 673.02 0.13 0.22 6049 PROP Profile 673.13 0.24 0.33 0.11 5915 DUP_Profile 672.5 5915 COR_Profile 672.39 -0.11 5915 EXIST_Profile 672.64 0.14 0.25 5915 PROP Profile 672.78 0.28 0.39 0.14 5647 DUP_Profile 671.72 5647 COR_Profile 671.55 -0.17 5647 EXIST_Profile 671.92 0.2 0.36 5647 PROP Profile 672.1 0.38 0.55 0.18 5571 DUP_Profile 671.66 5571 COR_Profile 671.49 -0.17 5571 EXIST Profile 671.87 0.21 0.38 5571 PROP Profile 672.1 0.44 0.61 0.23 5515 DUP_Profile 671.66 5515 COR_Profile 671.49 -0.17 5515 EXIST_Profile 671.87 0.21 0.38 5515 PROP Profile 672.06 0.4 0.57 0.19 5449 DUP_Profile 671.63 5449 COR_Profile 671.46 -0.17 5449 EXIST Profile 671.85 0.22 0.39 5449 PROP Profile 672.04 0.41 0.58 0.19 5096 DUP_Profile 671.33 5096 COR_Profile 671.14 -0.19 5096 EXIST Profile 671.58 0.25 0.44 Civil & Environmental Consultants, Inc. -16- Forney Creek Stream Relocation Hydrologic and Hydraulic Technical Report January 2023 Revised:July 2023 Revised:January 2024 River Plan W.S. Vs.Effective Vs. Corrected Vs. Existing Station Elev. Model Effective Model Conditions Model 5096 PROP Profile 671.79 0.46 0.65 0.21 4700 DUP_Profile 670.96 4700 COR_Profile 670.73 -0.23 4700 EXIST_Profile 671.25 0.29 0.52 4700 PROP Profile 671.49 0.53 0.76 0.24 4397 DUP_Profile 670.65 4397 COR_Profile 670.52 -0.13 4397 EXIST Profile 670.83 0.18 0.31 4397 PROP Profile 671.34 0.69 0.82 0.51 4296 DUP_Profile 670.45 4296 COR_Profile 670.45 0 4296 EXIST Profile 670.85 0.4 0.4 4296 PROP Profile 671.3 0.85 0.85 0.45 4196 DUP_Profile 670.45 4196 1 COR_Profile 670.42 -0.03 4196 EXIST Profile 670.78 0.33 0.36 4196 PROP Profile 671.24 0.79 0.82 0.46 4162 4069 DUP_Profile 664.56 4069 COR_Profile 665.7 1.14 4069 EXIST_Profile 665.49 0.93 -0.21 4069 PROP Profile 670.68 6.12 4.98 5.19 4010 DUP_Profile 664.18 4010 COR_Profile 665.74 1.56 4010 EXIST Profile 665.49 1.31 -0.25 3951 DUP_Profile 663.92 3951 COR_Profile 664.93 1.01 3951 EXIST Profile 665.19 1.27 0.26 3951 1 PROP Profile 670.1 6.18 5.17 4.91 Civil & Environmental Consultants, Inc. -17- Forney Creek Stream Relocation Hydrologic and Hydraulic Technical Report January 2023 Revised:July 2023 Revised:January 2024 River Plan W.S. Vs. Effective Vs. Corrected Vs. Existing Station Elev. Model Effective Model Conditions Model 3824 DUP_Profile 663.82 3824 COR_Profile 664.98 1.16 3824 EXIST Profile 665.04 1.22 0.06 3824 PROP•Profile 669.65 5.83 4.67 4.61 3800 PROP Profile 668.7 3591 DUP_Profile 663.53 3591 COR_Profile 664.82 1.29 3591 EXIST Profile 664.88 1.35 0.06 3591 PROP Profile 667.17 3.64 2.35 2.29 3377 DUP_Profile 663.28 3377 COR_Profile 664.65 1.37 3377 EXIST_Profile 664.71 1.43 0.06 3377 PROP Profile 665.55 2.27 0.9 0.84 3167 DUP_Profile 663.07 3167 COR_Profile 664.52 1.45 3167 EXIST_Profile 664.59 1.52 0.07 3167 PROP Profile 664.64 1.57 0.12 0.05 2947 DUP_Profile 662.65 2947 COR_Profile 664.27 1.62 2947 EXIST_Profile 664.35 1.7 0.08 2947 PROP Profile 664.21 1.56 -0.06 -0.14 2809 DUP_Profile 662.25 2809 COR_Profile 664.01 1.76 2809 EXIST-Profile 664.02 1.77 0.01 2809 PROP Profile 663.93 1.68 -0.08 -0.09 2708 DUP_Profile 662.17 2708 COR_Profile 663.96 1.79 2708 EXIST Profile 663.98 1.81 0.02 2708 1 PROP Profile 663.77 1.6 -0.19 -0.21 Civil & Environmental Consultants;Inc. -18- Forney Creek Stream Relocation Hydrologic and Hydraulic Technical Report January 2023 Revised:July 2023 Revised:January 2024 River Plan W.S. Vs. Effective Vs. Corrected Vs.Existing Station Elev. Model Effective Model Conditions Model 2608 DUP_Profiile 662.12 2608 COR_Profile 663.91 1.79 2608 EXIST_Profile 663.96 1.84 0.05 2608 PROP Profile 663.36 1.24 -0.55 -0.6 2481 DUP_Profile 662.07 2481 COR_Profile 663.84 1.77 2481 EXIST Profile 663.9 1.83 0.06 2481 PROP Profile 663.15 1.08 -0.69 -0.75 2358 DUP_Profile 661.98 2358 COR_Profile 663.78 1.8 2358 EXIST_Profile 663.82 1.84 0.04 2358 PROP Profile 662.16 0.18 -1.62 -1.66 2158 DUP_Profile 661.84 2158 COR_Profile 663.69 1.85 2158 EXIST-Profile 663.73 1.89 0.04 2158 PROP Profile 661.75 -0.09 -1.94 -1.98 1895 DUP_Profile 661.67 1895 COR_Profile 663.52 1.85 1895 EXIST_Profile 663.6 1.93 0.08 1895 PROP Profile 661.43 -0.24 -2.09 -2.17 1822 DUP_Profile 661.62 1822 COR_Profile 663.52 1.9 1822 EXIST_Profile 663.55 1.93 0.03 1822 PROP Profile 661.42 -0.2 -2.1 -2.13 1745 DUP_Profile 661.19 1745 COR_Profile 663.19 1.9 1745 EXIST_Profile 663.21 1.93 0.08 1745 PROP Profile 661.37 -0.2 -2.09 -2.17 1692 DUP Profile 661.13 Civil & Environmental Consultants, Inc. -19- Forney Creek Stream Relocation Hydrologic and Hydraulic Technical Report January 2023 Revised:July 2023 Revised:January 2024 River Plan W.S. Vs. Effective Vs. Corrected Vs. Existing Station Elev. Model Effective Model Conditions Model 1692 COR_Profile 663.15 2.02 1692 EXIST Profile 663.16 2.03 0.01 1596 DUP_Profile 661 1596 COR_Profile 663.06 2.02 1596 EXIST Profile 663.08 2.09 0.07 1555 DUP_Profile 660.98 1555 COR_Profile 662.36 1.36 1555 EXIST Profile 662.38 1.38 0.02 1540 1514 DUP_Profile 660.91 1514 COR_Profile 660.69 -0.22 1514 EXIST Profile 660.74 -0.17 0.06 1514 PROP Profile 661.25 0.34 0.28 0.22 1455 DUP_Profile 660.5 1455 COR_Profile 660.93 0.43 1455 EXIST Profile 661 0.5 0.07 1452.05 PROP Profile 661.06 1398.04 PROP Profile 660.55 1393 DUP_Profile 660.17 1393 COR_Profile 660.62 0.45 1393 EXIST Profile 660.63 0.46 0.01 1307 DUP_Profile 660.04 1307 COR_Profile. 660.68 0.64 1307 EXIST Profile 660.47 0.43 -0.21 1307 PROP Profile 660.21 0.17 -0.47 -0.26 1226 DUP_Profile 659.95 1226 COR Profile 659.49 -0.46 Civil & Environmental Consultants. Inc. -20- Forney Creek Stream Relocation Hydrologic and Hydraulic Technical Report January 2023 Revised:July 2023 Revised:January 2024 River Plan W.S. Vs.Effective Vs. Corrected Vs.Existing Station Elev. Model Effective Model Conditions Model 1226 EXIST_Profile 659.49 -0.46 0 1226 PROP Profile 659.49 -0.46 0 0 955 DUP Profile 659.06 955 COR_Profile 659.06 0 955 EXIST Profile 659.06 0 0 955 PROP Profile 659.06 0 0 0 727 DUP Profile 658.72 727 COR_Profile 658.72 0 727 EXIST Profile 658.72 0 0 727 PROP Profile 658.72 0 0 0 638 DUP Profile 658.72 638 COR_Profile 658.72 0 638 EXIST Profile 658.72 0 0 638 PROP Profile 658.72 0 0 0 532 DUP Profile 658.58 532 COR Profile 658.58 0 532 EXIST Profile 658.58 0 0 532 PROP Profile 658.58 0 0 0 253 DUP Profile 658.47 253 COR Profile 658.47 0 253 EXIST Profile 658.47 0 0 253 PROP Profile 658.47 0 0 0 Civil & Environmental Consultants, Inc. -21- Forney Creek Stream Relocation Hydrologic and Hydraulic Technical Report January 2023 Revised:July 2023 Revised:January 2024 APPENDIX A-LOCATION MAP k, r r NORTH r � _ i L J Fat Linmla HIiA£cM1 SITE! 7 U `) m REFERENCE -US TOPOGRAPHIC MAP/ARCGIS MAP SERVICE: - -��' .,�'I I SCALE IN FEET g HTTP://GOTO.ARCGISONLINE.COM MAPS/USA_TOPO_MAPS, ACCESSED 9/26/2022 .,� \0 2,000 4,000 . 1 ° B.V. HEDRICK INDUSTRIES Al y [1AA A FORNEY CREEK STREAM RESTORATION y Civil & Environmental Consultants, Inc. LINCOLN COUNTY, NC 0 117 Seaboard Lane Suke E-100-Franklin,TN 37067 0 615-333-7797.800-365-2324 LOCATION SITE MAP m www.cminc.com m DRAWN BY: WJW CHECKED BY: CLG APPROVED BY: JBS FIGURE NO: A DATE: 04/24/2022 SCALE: 1 " = 2 000' PROJECT No: 183-802 H APPENDIX B--FEMA FIS AND FIRM EXCERPTS National Flood Hazard Layer FIRMette ( aFEMA Legend 81°1-45"W 35°26'19"N SEE FIS REPORT FOR DETAILED LEGEND AND INDEX MAP FOR FIRM PANEL UnUr )c .A, g Without Base Flood Elevation(BFE) ' Zane A,V,A99 'SPECIAL FLOOD With BFE or Depth zone a..An,,Alf,M AR • IHAZARD AREAS '. Regulatory Floodway, 'I 0.2%Annual Chance Flood Hazard,Areas / of i%annual Chance flootl with average depth less than one foot or with drainage ! ._. areas of less than one square mile zone% 1 1 1 Future Cord pions i%Ann ual Chance Flood Hazard zonox c Area with Notes. FIOotl Risk due to LeveOTHER AREAS OF Area with Flood Rskdu •- '� FLOOD HAZARD _ Area with Flootl Risk due to LeveeianeD - FLOOUWAY �} ZOA�B AE�� arY NOSCREEN Area of Minimal Flood Hazard zanex T" Q Effective LOMRs OTHER AREAS Area of Undetermined Flood Hazard zaneD GENERAL --- Channel,Culvert,or Storm Sewer t STRUCTURES IIIIIII Levee,Dike,or Floodwall Approximate 0—ma Cross Sections with i%Annual Chance ti Revised Area 17.5 Water Surface Elevation Coastal LINCOL COUNTYTransact COUNTY —in— Base FloododElevation tion Line(BFE) 37014¢; o Limit iStudy c Jurisdiction Boundary — Coastal Transact Baseline OTHER Profile Baseline e _- _ 4 - FEATURES Hydrographic Feature tY a z; AREA OF MINIMAL.F.LOOD HAZARD 0 Digital Data Available N r Q No Digital Date Available ./ MAP PANELS ® Unmapped 1 •a F'1 Q The pin displayed on the map is an approximate Zone AE point selected by the user and does not represent - � an authoritative property location. I This map complies with FEMA's standards for the use of digital flood maps If It Is not void as described below. i � ji The basemap shown compiles with FEMA's basemap accuacystandards /-• The flood hazard Information Is derived directly from the s authoritative NFHL web services provided by PEMA.This map ° •' was exported on 9/17/2021 at 12:47 PM and does not 4, reflect changes or amendments subsequent to this date and time.The NFHL and effective Information may change or I .P• become superseded by new data over time. _ This map Image is void if the one or more of the following map elements do not appear.basemap imagery,flood zone labels, ` o legend,scale bar,map creation date,community Identifiers, 61°1'8"VJ 35125'49"N FIRM panel number,and FIRM effective date.Map Images for Feet 1:6r000 unmapped and unmodernized areas Cannot be used for 0 250 500 1,000 1,500 2,000 regulatory purposes. Basemap:USGS Natlonal Map:Ortholmagery:Data refreshed October,2020 National Flood Hazard Layer FIRMette FEMA Legend OS°S'll"W 35°26'36'N SEE FIS REPORT FDR DETAILED LEGEND AND INDEX MAP FOR FIRM PANELLAYOUT }- ,. 145 �.•�, W Zithoutna Base Flood Elevation(BFE) A,V,A99 t �; 's �� A• 1 (SPECIAL FLOOD With BFE or Depth zoneAE,AD,AH.Vc,AR ' Y ♦ ( !HAZARD AREAS Regulatory Floodway, o.2%Annual Chance Flood Hazwith average of i%annual chance flood with average •i t „Si, —✓ depth less than one foot or with drainage I ' A areas of less then one square mile Zone t r / Future Flotll Haza%Annual Chance Flood Reduced Flood zod R i s Area with Nolmtl Flootl Risk due to 7!'• Y OTHER AREAS OF Levee.Sea Notes zonex . FLOOD HAZARD r'o Area with Flood Risk due to LeveeZen.D _ 1 No SCREEN Area of Minimal Flood Hazard zonex Effective LOMRs OTHER AREAS Area of Undetermined Flood Hazard zo 0 ' • ZoneAE FLOODWAY GENERAL —__ Channel,Culvert ors[o mSewer _ ZOtte r STRUCTURES IIIIIII Levee,Dike,or Floodwall yr, Cross Sections with 1%Annual Chance tiE' y �fY y - 17.5 Water Surface Elevation I 11 LOIN 0 COUNTY 1' 1 1 1 - -- Coastal Transact --m---Base Flood Elevation Line(BFE) I I 370146 —Limit of study Jurisdiction Boundary Coastal I -"'- OTHER Profile Baseline t Baseline °.it i FEATURES Hydrogrephic Feature ❑ Digital Data Available No Digital Data Available Q _ r NIAP PANELS ® Unmapped AREA OF MINIMA FLOOD HAZARD ` ZOf X The pin displayed on the map is an approximate point selected by the user and does not represent an authoritative property location. Approximate e Rev)$ed Area This map flood maps If It F of AS void as described the use of R U �. Theblgoodmapsif Ito not void as tlesNsbabelow. j The basemap shown complies with FEMA's basemap — accuracy standards f The flood hazard Information Is derived directly from the } authoritative NFHL web services provided by FEMA.This map f ' F`7Y •E"+ was exported On 9/17/2021 at 1-35 PM and does not reflect changes or amendments subsequent to this date and time.The NFHL and effective Information may change or become superseded by new data over time. Thi`a 9� map Image void If the one or more of the following map elements a 1 I 1 elements tlD not appear.basemap imagery,flood zone labels, It legend,scalebar,map creation date,community Identifiers, R i'0'39"W 35°267"N FIRM panel number,and FIRM effective date.Map Images for Feet 1:6 000 unmapped and unmodemized areas Cannot be used for 0 250 500 i,000 1,500 2,000 ' regulatory purposes. Basemap:USGS National Map:Ortholmagery:Data refreshed October,2020 FLOOD INSURANCE STUDY FEDERAL EMERGENCY MANAGEMENT AGENCY A Report of Flood Hazards in LINCOLN COUNTY, NORTH CAROLINA AND INCORPORATED AREAS Community Name Community Number CITY OF LINCOLNTON 370147 LINCOLN COUNTY 370146 1E,"S CWPF TING TCCK:IMPARiNER EFFECTIVE: 8/16/2007 REVISED: 3/18/2008 Federal Emergency Management Agency State of North Carolina Flood Insurance Study Number 37109CV000 �qxn s4° www.fema.gov and www.ncfloodmaps.com `°"""� Table 22 - Floodway Data Floodwa Source. Floodwa Water Surface Elevation Cross Section Oislance(Feet Width(Feel) Secllon Area Mean Velocity Regulatory Without Floodway Wilh Floodwey Increase Above Mouth) (Square Feel) (Feel Per Second Clarks Creek 003 300 124.0 1811.0 6.8 764.21 759.3 760.1 0.8 011 1,120 144.0 1767.0 7.0 764.21 761.2 762.0 0.8 015 1,520 499.0 5352.0 2.3 764.21 762.2 762.9 0.7 026 2,560 412.0 4760.0 2.6 764.21 762.4 763.1 0.7 041 4,100 221.0 2370.0 5.2 764.21 762.8 763.5 0.7 052 5,160 1147.0 12666.0 0.9 764.21 763.4 764.2 0.8 061 6,120 897.0 8800.0 1A 764.21 763.6 764.3 0.8 081 8,120 1000.0 9131.0 1.3 764.21 763.9 764.7 0.8 096 9.620 284.0 2445.0 4.9 764.4 764.4 765.2 0.8 116 F 1100.0 9512.0 1.3 766.2 766.2 767.1 0.9 132 663.0 5034.0 2.4 766.8 766.8 767.7 0.9 152 467.0 2581.0 4.6 769.6 769.6 770.5 0.9 161 134.0 1603.0 7A 772.3 772.3 773.3 1.0 165 1188.0 11529.0 1.0 773.5 773.5 774.3 0.8 170 1322.0 14778.0 0.8 773.5 773.5 774.3 0.8 186 18,550 679.0 6891.0 1.7 773.6 773.6 774A 0.8 199 19.850 704.0 5868.0 2.0 773.7 773.7 774.5 0.8 210 20.970 1913.0 6047.0 1.9 774.1 774.1 774.9 0.8 226 22,590 767.0 5809.0 2.0 775.4 775.4 776.3 0.9 243 24,310 977.0 5499.0 2.1 777.2 777.2 778.2 1.0 265 26,510 678.0 3954.0 2.9 l780.0 780.0 1781.0 1.0 Fornev Creek 003 253 137.0 1449.0 2.6 662.81 658.5 659.5 1.0 005 532 85.0 906.0 4.2 662.81 658.6 659.5 0.9 010 955 52.0 658.0 5.7 662.81 659.1 660.0 0.9 015 1,455 77.0 925.0 4.1 662.81 660.5 661.5 1.0 019 1,895 229.0 2107.0 1.8 662.81 661.7 662.7 1.0 (d 024 2,358 227.0 1773.0 2.1 862.81 662.0 662.9 0.9 205.0 1524.0 2.4 862.81 662.1 663.1 1.0 026 2,608 Q 029 2,947 159.0 1204.0 3.1 662.81 662.7 663.5 0.8 0 N 034 3,377 214.0 1485.0 2.5 663.3 663.3 664.2 0.9 > 038 3,824 162.0 1171.0 3.2 663.8 663.8 664.8 1.0 0) 043 4,296 109.0 865.0 4.3 670.4 670.4 670A 0.0 047 4.700 215.0 1743.0 2.1 671.0 671.0 671.6 0.6 051 5,096 203.0 1847.0 2.0 - 671.3 671.3 672.0 0.7 054 5,449 203.0 1819.0 2.0 671.6 671.6 672.4 0.8 059 5 915 124.0 1185.0 3.0 1672.5 672.5 673.4 0.9 064 6.434 1272.0 2531.0 1.4 673.2 673.2 674.1 0.9 068 6,844 211.0 1821.0 2.0 673.4 673.4 674.3 0.9 076 7.642 315.0 2280.0 1.5 674.0 674.0 674.9 0.9 Oa3 8,298 130.0 971.0 3.6 674.7 674.7 675.5 0.8 088 8,817 195.0 1538.0 2.3 675.8 675.8 676.7 0.9 094 9,418 107.0 764.0 4.6 676.3 676.3 677.2 0,9 099 9,897 162.0 1171.0 3.0 678.2 678.2 fi79.1 0.9 Flood Insurance Study Report:LINCOLN COUNTY,NORTH CAROLINA AND INCORPORATED AREAS Effective Date:August 16,2007 Page 102 of 114 APPENDIX C-TOPOGRAPHIC WORK MAP AND ANNOTATED FIRMS B 7 6 5 3 2 .,__...�_..._.�. 1 - emu, H �EMA EFFECTIVE a2%nNNU H AL•, CHANCE FLOODPtAIIV a FCMA FF FEC'llVE1r ANNUAL �� CHANCE FLOODPLAIN N THE ' h - e [FEMA FFECTIVE FLOODWAY „ ' G PROPOSED 0 2/o PERCENT ANNUAL CHANCE FLOODPLAIN TIE-IN PROPOSED I%PERCENTANNUAL CHANCE FLOODPLAIN TIE-IN iw ' � i M e NOTE F F PROPOSED FLOODWAY TIE-IN - THE DATA WAS DEVELOPMENT BASED ON A HORIZONTAL ,r N^ ss.�/. PROPOSED 1%PERCENTANNUAL PROJECTION/DATUM OF NORTH CAROLINA STATE PLANE ZONE - D A VERTICAL DATUM OF NAVD68 CHANCE FLOODPLAIN TIE IN NAD83 US SURVEY FEET AN g �,•, ;^- PROPOSED0.2%PERCENTANNUAL -E- GEOID 12B SURVEY FEET. '"t r CHANCE FLOODPLAIN TIE-IN LEGEND w `,/✓„� PROPOSED FLOODWAY PROPOSE %ANNUAL ,,.-�r`'��" --ycww"'`"^. 67d-.: � >, °--^-'^- FEMA EFFECTIVE FLOODWAY CI IANCE FLOODPLAIN /% -"' - 660 --"` „} {` -� .,,a _-. -- PROPOSED I%ANNUAL CHANCE FLOODPLAIN E FEMA EFFECTIVE 1%ANNUAL CHANCE FLOODPLAIN •`.J , PROPOSED 0.2/ANNUAL CHANCE FLOODPLAIN 1 �560A1 FEMA EFFECTIVE 0.2%ANNUAL CHANCE FLOODPLAIN PROPOSED REACH TIE-INI -_ « PROPOSED ROADWAY CROSSING ." jj / - ---- — ——••—— PROPOSED RIVER REACH EFFECTIVE RIVER REACH l� ° Cross Sections D PROPOSED 0.2%ANNUAL ----- CHANCE FLOODPLAI[_ N r—___ -f'"' '',M/ ,J � 9 PARCEL PROPOSED FLOOD �`•, �,,Y,v' fj"" -- - ----- PROPOSED MAJOR CONTOURS r om ---- PROPOSED MINOR CONTOURS EXISTING MAJOR CONTOURS P �--ROPOSED REACH - EXISTING MINOR CONTOURS .. 1 'so-� REFERENCE C j USGS TOPOGRAPHIC MAP/ARCGIS MAP SERVICE: $ e w { € HTTP:/IGOTO.ARCGISONLINE.COM/MAPS/USA_TOPO_MAPS, 1 ACCESSED 1/19/2024 r li SCALE IN FEET 0 200 400 600 B00 W AV YAM 9 t c I q Civil& Environmental Consultants,Inc. B 12,5 117 Seaboard Lane,Suite E100 600.763l2326nnessee 37067 E _ LPROPOSFDREACHTIE-IN _ _._[,_ - _ ----- �PhOPOSED�BRIDGE RS1423.44J PROPOSED 029 PERCENTANNUAL B.V. HEDRICK INDUSTRIES PROPOSED 1%L PERCENTTIF-IN \\ a IANCE FLOODPLAI'TIE-w FORNEY CREEK STREAM RESTORATION �OPOSCD 02%PERCENT ANNUAL CHANCE FLOODPLAIN TIE-IN / �ROPOSED 1%IPERCENTANNUAL CI IANC E FLOODPI AIN ilE-IN \\\\ �I, CHANCE FL�ODPLAIN TIE-IN ` CA LINCOLN COUNTY NC f �N CAR /� FEMA EFFFCTIVEI�ANNUALj \i �PROPOSEDFLOODWAYTIE-IN I - .� 9[. DRAWN BY, JTCHECKED BY: CLG APPROVED BY: JBS f CHANCE FLOODPLAIN _ Il• 0562 _ DATE: /1/912024 SCALE: 1'•=2pp' PROJECT NO: 1$3$02 '�� --- : FIGURE NO:(� FEMAEFFECTIWEFLOODWAY � ��'P�ST/NEGJ'IeP`� � TOPOGRAPHIC WORKING MAP •+ W A - .� ;°ti FN°,NEE?. PROPOSED CONDITIONS 'S //lll�llllW, c.Csr,:�1: Earths�sr Geograpl 4 3 2 1 RS1514 >l'(�� If{II s! . Jl / /ii/�i�cuLVERT INVERT J J / ` c NORTH_ ELEV. s47.2o \ t I `. � /� `. � �� 1.-•w`1 t 46 O JJ!ILI \ �IIjI CULVERT INVERT] /I' ELEV. - 647.20I;- /I1J�` STREAM INVERT �'• /ice ./-/ `--ELEV. 647.84 INVERT -ELEV. = 647.10-- i/t1-\ S1555 j��2�11;___ SCALE IN FEET w 0 50 100 670 670 STA 00+00.85 STA 00+56.50 i ELEV 661.2 660 660 ELEV 658.8 1 EXISTING GROUND 650 / 650 9.5' CAST IRON PIPE 640 640 0+00 +25 +50 0+75 RS1540 PROFILE SCALE H:1"=50'; V:1"=20' CARo��''%, 562 1. TOPOGRAPHIC INFORMATION BASED UPON SURVEY CONDUCTED BY CIVIL AND ENVIRONMENTAL CONSULTANTS IN OCTOBER 2020 IN VERTICAL DATUM "'/,s7'11VE Gt `' .\�� NAD88 AND HORIZONTAL DATUM NAD83. ,�,�Air B V FORNEY CREEK TRIES ?' Civil&Environmental Consultants,Inc. LINCOLN COUNTY,NC `r 3701 Arco Corporate Drive.Seite 400•Charlotte,NC 28273 Ph:980.237.0373•Fax:980.237.0372 RS1540 CULVERT www.cecinc.com EXISTING PLAN AND PROFILE DRAWING DRAWN BY: A CHECKED BY: CLG APPROVED BY: JBS FIGURE NO.: DATE: JANUARY 2023 DWG SCALE: AS SHOWN PROJECT No: 183-sot NORTH l 1 ' ( PROPOSED BRIDGE 24 WIDE. SCA E I o 'I !:� I PROPOSED RAIL HIGH CHORD ELEV. 659.08' " PROPOSED HIGH CHORD ELEV. 654.85' PROPOSED LOW CHORD ELEV. 651' 660 \ '',. _ 660 171 S t v v 3' X 40' STEEL —BEAMS O O 650 .,. 650 I— W —i� 2e TALL HEADER AND 4" UJ PROPOSED CLEAR SPAN PLATE FROM BANKFULL y WIDTH PER MODEL SET UP ELEVATION g 640 640 3 +0+00 1+00 S 2+00 g PROPOSED BRIDGE CROSSING PROFILE SCALE H:1"=50'; V:1"=10' SCALE IN FEET 0 50 too O�-Fess�o 2..�0 562 9/2k@2g k ,p� GINS. P l 1. TOPOGRAPHIC INFORMATION BASED UPON SURVEY CONDUCTED BY Sr➢7L ST"" 0 AND ENVIRONMENTAL CONSULTANTS IN OCTOBER 2020 IN VERTICAL DATUMG1�y1`\.\� NAD88 AND HORIZONTAL DATUM NAD83. U a B.V. HEDRICK INDUSTRIES ,�,�,� $ C W FORNEY CREEK 4 Civil&Environmental Consultants,Inc. LINCOLN COUNTY, NC 3701 Arm Corporate Drive $rite 400 CIradotle,NC 282]3 Pk M.231.03M Fax 990.237=2 IRS 1423.44 BRIDGE wwvvCFFdna.com PROPOSED PLAN AND PROFILE DRAWING DRAWN BY: CLGI CHECKEDBY: CLG APPROVED BY: UB$FIGURENO.: DATE: JANUARY 2023 DWG SCALE: AS SHOWN PROJECT NO: 183-802