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Home My WebLink About20151085 Ver 1_Flood Study_20151019♦♦ AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAI, t ► French Broad River US -64 Float Fishin g Access • ► Etowah North Carolina No -Rise Flood Study Henderson County, North Carolina July 2, 2015 4 Prepared For: North Carolina Wildlife Resources Commission Engineering Services 1718 NC HW Y 56 West Creedmoor, NC 27522 zz Prepared By: OQ` ESSip • .•�L % j jWard Consulting Engineers, P.C. _ ` ;' �•', j NCBELS Firm # C -2619 = ► 13344 �-�? -=v�Q/ ► 4805 Green Road, Suite 100 :•Q ; ► Raleigh, NC 27615 -5088 �•.c�N �_.� ► -- GINE �P� � ► Phone: 919 - 870 -0526 %,�1- •` ► Fax: 919 - 870 -5359 j �Ivvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvv ♦\, Table of Contents 1.0 Introduction ............................................................... ............................... 3 2.0 Background ................................................................. ..............................3 3.0 No Encroachment Alternative .................................... ............................... 3 4.0 Encroachment Alternative .......................................... ............................... 3 5.0 Analysis ..................................................................... ............................... 3 5.1 Effective Model ........................................................................................................ ............................... 3 5.2 Corrected Effective Model ....................................................................................... ............................... & 5.3 Pre - Project Model ................................................................................................... .............................16 5.4 Post Project Model .................................................................................................. .............................12 6.0 Results /Conclusion .................................................. ............................... 13 7.0 Computer Models .................................................... ............................... 14 Engineering "No Impact" Certification Appendix Appendix A — Effective HEC -2 Model & FIS Report Data Appendix B — Flood Study Work Map Appendix C — Cross Section Comparison Existing and Proposed Appendix D — HEC -RAS Model Output Tables 1. Effective Model 100 -year & Floodway 2. Corrected Effective Model 100 -year & Floodway 3. Pre - Project Model 100 -year & Floodway 4. Post - Project Model 100 -year & Floodway Appendix E — Construction Plans Ward Consulting Engineers, P.C. 2 US -64 Float Fishing Access July 2, 2015 French Broad River French Broad River US -64 Float Fishing Access Henderson County, North Carolina 1.0 Introduction The US -64 Float Fishing Access is planned for construction on the French Broad River in Etowah, Henderson County downstream of the US -64 Bridge by the North Carolina Wildlife Resources Commission. 2.0 Background The proposed US -64 Float Fishing Access Area lies between the US -64 Road Bridge and an existing railroad trestle on the French Broad River in Henderson County. The two bridge structures are located approximately 550 feet apart. The property for the proposed access area is adjacent to and downstream of the northern right of way line on US -64. The project includes a public boat ramp and a paved parking area that will be accessed from US -64. The purpose of this project is to determine the effects of the proposed improvements within the FEMA regulated floodplain and floodway of the French Broad River. 3.0 No Encroachment Alternative The proposed boat ramp will not be able to be installed with out encroaching into the floodplain and floodway of the French Broad River. The launch requires access to the water and stream channel to function and therefore a no encroachment alternative is not possible for this project. 4.0 Encroachment Alternative Encroachment within the floodplain and floodway is required for the planned boat launch into the French Broad River. The proposed project has minimized impacts within the encroachment area. The improvements include grading within the floodplain for parking areas and proposed boat launch. The boat launch is located in the floodway of the stream along with a portion of the parking lot. The remaining parking lot and access road are located in the floodplain. The right (eastern) stream bank will excavated where the ramp is to be placed. Cut and fill is being placed within the floodplain for the construction of a parking area and roadway access to the launch. The project fill and excavation elevations have been minimized. 5.0 Analysis 5.1 Effective Model The effective FEMA HEC -2 detail study models were obtained from the North Carolina Flood Mapping program for the French Broad River. Paper files of the HEC -2 input and output data were sent of the effective model. The effective model had to be recreated in HEC -RAS from the HEC -2 input data as a digital copy of the HEC -2 model was not available for import into the HEC -RAS model. The following steps were taken for the recreation of the model. A Ward Consulting Engineers, P.C. 3 US -64 Float Fishing Access July 2, 2015 French Broad River truncated portion of the model was used for the no -rise study. The model was started at River Station 174.2 and ended at River Station 180.82. • GR record data from River Station 174.2 to 180.82 were entered into a station and elevation format into an excel spread sheet. Data was cut off on the paper print out of the data for cross sections 177.04, 177.15, and 180.25. The missing data for cross section 177.04 was recreated by copying the data from next upstream cross section which is also labeled as 177.04. The missing data for cross section 177.15 is part of the bridge data for the high and low chords. The missing data was recreated by mirroring the available data and verifying that it matched the cross section grade. The missing data for cross section 180.25 was recreated by maintaining similar slopes and stream banks to the upstream and downstream cross sections. The center line stations varied in station number for each section. • The effective model stations through the railroad bridge and the US -64 Bridge were in the original model with the same station of 177.04 and 177.15 respectively due to the stations being called out as river miles. The distances were measured between river station 9390 and 9251 shape file information downloaded from NC Flood Maps web site. The cross section stations were measured and adjusted and converted into distances in feet. The distances in feet assigned to each section were then converted back to river miles for the effective model. The table below shows the adjustments. Measured and Effective HEC -RAS Effective HEC -2 Description Adjusted Stations in model stations Stations in river miles feet converted from feet to river miles Rail Road Bridge Sections 177.04 935155 177.1127 177.04 935185 177.1184 177.04 DS Face 935186 177.1186 177.04 _ US Face 935216 177.1242 1 177.04 935217 177.1244 US -64 Sections 177.15 935728 177.2212 177.15 DS Face 935733 177.2222 177.15 US Face 935763 177.2278 177.15 935768 177.2288 177.15 935788 177.2326 • River station 177.8 was located in the effective model an equal distance between the US -64 Bridge and the railroad trestle. The measured distance however did not match the distance in the model. This cross section was re- stationed to keep it in the location intended in the original model with the corrected distance. Therefore this station at 177.08 was determined to be at river station 935466 feet. The river station in feet was converted to river miles and entered into the effective model at station 177.1716. Ward Consulting Engineers, P.C. 4 US -64 Float Fishing Access July 2, 2015 French Broad River • The station of each cross section at the center line for the river at each cross section was determined by measuring locating the top of banks in the cross section and approximating the station in the cross section. The center line stations for each cross section in the model is shown in the following table. Effective Cross Center of Section Channel Station 180.82 1600 180.25 2150 178.65 815 177.85 890 177.2326 2367 177.2288 2403 177.2278 2403 177.2222 2403 177.2212 2403 177.1716 1510 177.1244 1510 177.1242 1510 177.1186 1510 177.1184 1510 177.1127 1512 176.35 280 175.2 280 Ir 174.2 580 • The n values for the cross sections were obtained from the NC and NH records in the HEC -2 data. The only cross section with variable n values is at River Station 180.82. • The expansion and contraction coefficients were obtained from the NC records in the model. In the effective model the contraction coefficient was set at 0.1 and the expansion at 0.5 throughout the entire section of the model that was truncated for this study with no changes for the bridges. • The station of the left bank of the channel, right bank of the channel, left overbank, right overbank and length of channel between cross sections were obtained from the X1 records at each cross section. In the case where the cross section data was repeated and adjusted by an elevation constant it was applied to the cross section elevations in the excel spreadsheet. This adjustment only occurred at effective River Station 176.30. • Existing RR Trestle: The railroad bridge was described in the BT cards with the low chord and top of road /track elevations. The piers for the trestle were coded into the GR records as obstructions in the ground data. The data was entered into the model to match the effective HEC -2 modeling. Ineffective flow limits were added as follows to the model. River Station Lt. Ineffective Station /Elev (ft) 177.1186 1014.0 / 2078.40 177.1242 1014.0 / 2078.40 Rt Ineffective Station /Elev (ft) 1750/2082 1750/2082 Ward Consulting Engineers, P.C. 5 US -64 Float Fishing Access July 2, 2015 French Broad River • Existing US -64 Bridge: The downstream bridge face, piers, abutments, and ground was surveyed for the eastern bridge on NC -64 and compared to the HEC -2 model data. The information lined up and therefore there have not been any upgrades to the bridge prior to this study and therefore the data was current. River Station Lt. Ineffective Station /Elev (ft) Rt Ineffective Station /Elev (ft) 177.2278 1415 / 2080.8 2530 / 2080.9 177.2222 1415 / 2080.8 2530 / 2080.9 • The flow file for the HEC -RAS model was created from the discharges shown on the QT record for the 100 -yr (field 4) and 100 -yr floodway (field 6). • The starting boundary condition was entered into the model as known water surface elevation at River Station 174.20. The elevations were obtained from the hard copy of the output file that was received from NC Floodplain Mapping Program. The output data included the output from the multiple profile run. The water surface elevation shown in the data for the 100 -year storm event is 2073.0. The published Floodway Data Table in the effective FIS Report for Henderson County Dated October 2, 2008 for cross section 919776 is 2072.9 and the floodway elevation is 2073.8 with an increase of 0.9 feet shown. The data in the published data table was used in the HEC - RAS model. • The effective floodplain and floodway boundaries on Map Number 3700953900J, FIRM panel 9539 within the project area. Sections 9354 and 9348 are the published stations upstream and downstream of the project area. The shape files for the floodway were downloaded from NC Flood Maps web site. The floodway limits were scaled from the shape file locations. Minimal encroachment information was provided in the HEC -2 data print out. Some of the cross sections had scaled encroachments that were outside of the limits of the flood water and they had to be adjusted. The floodway was also adjusted to around the bridge abutments to fall inside the bridge. An approximate 4:1 expansion line was set for the encroachment between the US -64 Bridge and the railroad bridge downstream. The adjusted floodway lines within the project area are shown on the work map. The table below shows the measured versus the adjusted encroachment stations for the cross sections that were adjusted. River Station 177.2323 177.2288 177.2278 177.2222 177.2212 177.1716 177.1244 177.1242 Left Encroachment Measured Station 1067 1387 1392 1418 1422 990 995 995 Left Encroachment Adjusted Station 1352 1415 1415 1416 1416 990 1014 1016 Right Encroachment Measured Station 2521 2562 2564 2571 2572 1658 1713 1713 Right Encroachment Adjusted Station 2502 2529 2529 2529 2529 1645 1736 1736 Ward Consulting Engineers, P.C. 6 US -64 Float Fishing Access July 2, 2015 French Broad River 177.1186 998 1016.5 1720 1736 177.1184 998 1016 1720 1736 177.1127 1004 1016 1722 1735 The floodway encroachment stations left and right entered into the effective model are shown in the following table. River Station (miles /feet) 180.82 / 954,729 180.25 / 951,720 178.65 / 943,272 177.85 / 939,048 177.2326 / 936,788 177.2288 / 935,768 177.2278 / 935,763 177.2222 / 935,733 177.2212 / 935,728 177.1716 / 935,466 177.1244 / 935,217 177.1242 / 935,216 177.1186 / 935,186 177.1184 / 935,185 177.1127 / 935,155 176.35 / 931,751 175.2 / 925,926 174.2 / 919,776 Left Encroachment Station 661 713 471 819 1352 1415 1415 1416 1416 990 1014 1016 1016.5 1016 1016 180 180 202 Right Encroachment Station 1780 2612 1524 1370 2502 2529 2529 2529 2529 1645 1736 1736 1736 1736 1735 1973 1973 1154 • The effective model was run and the water surface elevations were compared to the published water surface elevations in the following table. The recreated HEC -RAS model compares within +/- 0.1 of a foot within the project area from River Stations 174.2 through US -64 Bridge at Station 177.15. The comparison at the railroad bridge was made at the downstream face and the upstream face at the Us -64 Bridge. These locations correspond with the published profile elevations. The cross sections beginning approximately 3300 feet upstream of US -64 compare within a range of -0.67 to +0.53 foot. 100 -Year Floodplain Comparison WSEL (ft) WSEL (ft) Effective Difference River Station Published HEC -RAS Effective - (miles / feet) Data Model Published 180.82/954730 2082.6 2081.93 -0.67 180.25/951,720 2081 2081.44 0.44 178.65/943,272 2080.2 2080.73 0.53 Ward Consulting Engineers, P.C. 7 US -64 Float Fishing Access July 2, 2015 French Broad River WSEL (ft) WSEL (ft) Effective Difference River Station Published HEC -RAS Effective - (miles / feet) Data Model Published 177.85/939,048 2078.6 2079.22 0.62 177.15/935,352 2077.3 2077.22 -0.08 177.04/934,771 2075.3 2075.24 -0.08 175.2/925,056 2073.7 2073.77 0.07 174.2/919776 2072.9 2072.9 0 100 -Year Floodway Comparison WSEL (ft) WSEL (ft) Effective Difference River Station Published (miles / feet) Data HEC -RAS Effective - Model Published 180.82/954730 2083.1 2082.95 -0.15 180.25/951,720 2082 2082.46 0.46 178.65/943,272 2081.1 2081.63 0.53 177.85/939,048 2079.2 2079.88 0.68 177.15/935,352 2078 2077.91 -0.09 177.04/934,771 2076.3 2076.15 -0.16 175.2/925,056 2074.7 2074.72 0.02 174.2/919776 2073.8 2073.8 0 5.2 Corrected Effective Model Since the water surface elevations produced with the re- created effective model compared well within the project area between the two bridges it was copied to the corrected effective model and further modified. The effective model FrenchBroad.p01 geometry file FrenchBroad.g01 was copied to geometry file FrenchBroad.g02, renamed to Corrected Effective and further modified as follows: • All of the River Stations in the geometry file previously referred to in miles were converted to feet. • Ineffective flow limits were set at all of the bridge cross sections as well as cross section 935466 in between the two bridges. The ineffective flow limits were set at the most restrictive limit of either the expansion of flow downstream of the bridge at a 1:4 rate or the contraction into the bridge at a 1:1 rate. The following table shows the additional ineffective flow limits that were added to the corrected effective model. The expansion and contraction limit lines have been shown on the plan drawing for reference. River Station Station Left Elevation Left Station Right Elevation Right 935788 1352 - 2517 - 935768 1410 2080.8 2535 2080.9 735763 1415 2080.8 2530 2080.9 Ward Consulting Engineers, P.C. 8 US -64 Float Fishing Access July 2, 2015 French Broad River River Station Station Left Elevation Left Station Right Elevation Right 935733 1415 2080.8 2530 2080.9 935728 1413 2080.8 2532 2080.9 935466 947 - 1645 - 935217 1014 2078.4 1750 2082 935216 1014 2078.4 1750 2082 935186 1014 2078.4 1750 2082 935185 1016 2078.4 1750 2082 935155 1016 - 1760 - *Note values in blue included in Effective Model • Actual distances between cross sections as measured from LIDAR Data were adjusted in the model. River Station 954729 951720 943272 939048 935788 935768 935763 935733 935728 935466 935217 935216 935186 935185 935155 931751 925926 919776 Downstream Distance Effective Model 3035 7935 4465 3100 20 5 30 5 200 200 1 30 1 30 3907 5300 5300 4450 Downstream Distance Corrected Effective Model 2493 8316 4322 3260 20 5 30 5 262 249 1 30 1 30 3404 5825 5422 4450 • The contraction and expansion coefficients were set in the effective model as. I and .5 respectively. The contraction coefficient was changed through the US -64 Bridge downstream through the railroad bridge to 0.3. Cross sections 935788 through 935155, excluding section 935466, contraction coefficients were changed to reflect a 0.3 value. • Modifications were made to Cross Section 935466 to model the existing surveyed topography. Ward Consulting Engineers, P.C. 9 US -64 Float Fishing Access July 2, 2015 French Broad River The effective floodway file was changed to reflect the new river stationing in feet and renamed Floodway CE.f02. The plan was saved as Corrected Effective.p02. The following table compares the Corrected Effective model and Effective Model water surface elevations. 5.3 Pre - Project Model The Corrected Effective model was copied and re -named as Pre - Project. Modifications were made to the Pre - Project model to include additional cross sections at locations within the project area to model the proposed improvements. The Corrected Effective model FrenchBroad.p02 geometry file FrenchBroad.g02 was copied to geometry file FrenchBroad.g03, renamed to Pre - Project and further modified as follows: • Cross Sections 935409, 935431, 935553 were added to the model to represent locations of improvements that will be coded into the post - project model. • The "n" values established for the channel and overbank in the Corrected Effective model were applied to the added sections. Manning's `n' values were established on the added cross sections to reflect the current land use and `n' values used in the Effective model. • Stream and overbank distances were adjusted to accommodate the additional cross sections. Ward Consulting Engineers, P.C. 10 US -64 Float Fishing Access July 2, 2015 French Broad River Difference Corrected Corrected Effective River Effective WSEL (FT Effective - Effective WSEL WSEL (ft) Station (ft) 100 -YR 100 FW 100 -YR 100 FW 100 -YR 100 FW 954729 2082.05 2083.01 2081.93 2082.95 0.12 0.06 951720 2081.68 2082.64 2081.44 2082.46 0.24 0.18 943272 2080.99 2081.8 2080.73 2081.63 0.26 0.17 939048 2079.61 2080.17 2079.22 2079.88 0.39 0.29 935788 2078.38 2078.94 2078.04 2078.64 0.34 0.3 935768 2077.56 2078.2 2077.31 2078 0.25 0.2 935763 2077.46 2078.1 2077.22 2077.91 0.24 0.19 935748 Railroad 935733 2077.14 2077.77 2076.92 2077.61 0.22 0.16 935728 2077.16 2077.79 2076.94 2077.63 0.22 0.16 935466 2077.04 2077.66 2076.98 2077.52 0.06 0.14 935217 2076.84 2077.5 2076.65 2077.36 0.19 0.14 935216 2075.8 2076.58 2075.77 2076.59 0.03 -0.01 935201 US -64 935186 2075.12 2076.04 2075.24 2076.15 -0.12 -0.11 935185 2075.5 2076.37 2075.61 2076.48 -0.11 -0.11 935155 2075.49 2076.35 2075.62 2076.46 -0.13 -0.11 931751 2074.32 2075.25 2074.23 2075.17 0.09 0.08 925926 2073.78 2074.73 2073.77 2074.72 0.01 0.01 Ir 919776 2072.9 2073.8 2072.9 2073.8 0 0 5.3 Pre - Project Model The Corrected Effective model was copied and re -named as Pre - Project. Modifications were made to the Pre - Project model to include additional cross sections at locations within the project area to model the proposed improvements. The Corrected Effective model FrenchBroad.p02 geometry file FrenchBroad.g02 was copied to geometry file FrenchBroad.g03, renamed to Pre - Project and further modified as follows: • Cross Sections 935409, 935431, 935553 were added to the model to represent locations of improvements that will be coded into the post - project model. • The "n" values established for the channel and overbank in the Corrected Effective model were applied to the added sections. Manning's `n' values were established on the added cross sections to reflect the current land use and `n' values used in the Effective model. • Stream and overbank distances were adjusted to accommodate the additional cross sections. Ward Consulting Engineers, P.C. 10 US -64 Float Fishing Access July 2, 2015 French Broad River • Contraction and expansion values were set at 0.1 and 0. 5, respectively, at the added cross sections. • Ineffective flow limits were set at the added sections based on the published FIRM floodway limit and flow transitions from the bridges. The ineffective flow limits are shown in the table below: • Encroachment limits were set for the added cross sections based on measured distances from the published Firm floodway line as shown in the table below. Ineffective Ineffective River Difference Pre - Station Flow Left Flow Right 1006 Station Station 935409 969 1660 935431 961 1655 935553 818 1633 • Encroachment limits were set for the added cross sections based on measured distances from the published Firm floodway line as shown in the table below. The model was run and the pre - project water surface elevations compared with the extended effective model elevations as shown in the following table. Encroachment Station Difference Pre - Left Right 935409 1006 1660 935431 998 1655 935553 948 1633 The model was run and the pre - project water surface elevations compared with the extended effective model elevations as shown in the following table. Ward Consulting Engineers, P.C. 11 US -64 Float Fishing Access July 2, 2015 French Broad River Difference Pre - Corrected Effective River Pre- Project WSEL (ft) Project- Corrected WSEL (ft) Station Effective WSEL (ft) 100 -YR 100 FW 100 -YR 100 FW 100 -YR 100 FW 954729 2082.05 2083.01 2082.06 2083.02 -0.01 -0.01 951720 2081.68 2082.63 2081.69 2082.65 -0.01 -0.02 943272 2080.98 2081.79 2081 2081.81 -0.02 -0.02 939048 2079.61 2080.16 2079.63 2080.18 -0.02 -0.02 935788 2078.37 2078.93 2078.4 2078.96 -0.03 -0.03 935768 2077.55 2078.18 2077.59 2078.22 -0.04 -0.04 935763 2077.45 2078.08 2077.48 2078.1 -0.03 -0.02 935748 Railroad 935733 2077.12 2077.74 2077.16 2077.77 -0.04 -0.03 935728 2077.14 2077.76 2077.18 2077.79 -0.04 -0.03 935553 2077.2 2077.75 935466 2077.07 2077.68 2077.09 2077.67 -0.02 0.01 935431 2077.03 2077.64 935409 2077.01 2077.63 935217 2076.84 2077.5 2076.84 2077.5 0 0 Ward Consulting Engineers, P.C. 11 US -64 Float Fishing Access July 2, 2015 French Broad River River Station 935216 935201 935186 935185 935155 931751 925926 919776 Pre - Project WSEL (ft) Corrected Effective WSEL (ft) 100 -YR 2075.8 US-64 2075.12 2075.5 2075.49 2074.32 2073.78 2072.9 100 FW 100 -YR 100 FW 2076.58 2075.8 2076.58 Difference Pre - Project- Corrected Effective WSEL (ft) 100 -YR 100 FW 0 0 2076.04 2075.12 2076.04 0 0 2076.37 2075.5 2076.37 0 0 2076.35 2075.49 2076.35 0 0 2075.25 2074.32 2075.25 0 0 2074.73 2073.78 2074.73 0 0 2073.8 2072.9 2073.8 0 0 5.4 Post Project Model The Pre - Project model was copied and re -named as Post - Project. Modifications were made to the Post - Project model to include additional cross sections at locations within the project area to model the proposed improvements. The Pre - Project model FrenchBroad.p03 geometry file FrenchBroad.g03 was copied to geometry file FrenchBroad.g04, renamed to Post - Project and further modified as follows: • Improvements at the cross sections within the proposed public boating access area were made to reflect the proposed construction plans prepared by the NC Wildlife Resources Commission. Improvements include grading and n -value adjustments in all cross sections within the proposed public boating access area as well boat ramp excavation at cross sections 935409, 935431, 935466. Cross sections showing a comparison of pre and post - project geometry are included in Appendix C. • Manning's "n" values were changed in the post project model to represent the conditions of the improvements such as the loss of vegetated areas with the addition of the parking area and addition of vegetated rip rap to the stream buffer at the ramp. The parking lot was modeled with an n -value of 0.025. The maintained areas were modeled with an n -value of 0.035. The post project model was run and the water surface elevations compared to the pre - project model as shown in the table below. Ward Consulting Engineers, P.C. 12 US -64 Float Fishing Access July 2, 2015 French Broad River Difference Post - River Post- Project WSEL (ft) Pre - Project WSEL (ft) Project- Pre - Project Station WSEL (ft) 100 -YR 100 FW 100 -YR 100 FW 100 -YR 100 FW 954729 2082.04 2083 2082.05 2083.01 -0.01 -0.01 951720 2081.67 2082.62 2081.68 2082.63 -0.01 -0.01 943272 2080.97 2081.78 2080.98 2081.79 -0.01 -0.01 939048 2079.59 2080.14 2079.61 2080.16 -0.02 -0.02 Ward Consulting Engineers, P.C. 12 US -64 Float Fishing Access July 2, 2015 French Broad River 6.0 Results /Conclusion A comparison of the Pre and Post - Project Model show that the proposed US -64 Float Fishing Access dock does not cause a rise in the 100 -year natural or floodway water surface elevations with the modifications shown in the attached work maps. These modifications include minor fill for the parking area /driveway, proposed dock, and excavation for the boat ramp. Ward Consulting Engineers, P.C. 13 US -64 Float Fishing Access July 2, 2015 French Broad River Difference Post - River Post- Project WSEL (ft) Pre - Project WSEL (ft) Project- Pre - Project Station WSEL (ft) 100 -YR 100 FW 100 -YR 100 FW 100 -YR 100 FW 935788 2078.35 2078.91 2078.37 2078.93 -0.02 -0.02 935768 2077.53 2078.16 2077.55 2078.18 -0.02 -0.02 935763 2077.43 2078.06 2077.45 2078.08 -0.02 -0.02 935748 935733 2077.11 2077.73 2077.12 2077.74 -0.01 -0.01 935728 2077.13 2077.75 2077.14 2077.76 -0.01 -0.01 935553 2077.19 2077.75 2077.2 2077.75 -0.01 0 935466 2077.06 2077.68 2077.07 2077.68 -0.01 0 935431 2077.02 2077.64 2077.03 2077.64 -0.01 0 935409 2077.01 2077.63 2077.01 2077.63 0 0 935217 2076.84 2077.5 2076.84 2077.5 0 0 935216 2075.8 2076.58 2075.8 2076.58 0 0 935201 935186 2075.12 2076.04 2075.12 2076.04 0 0 935185 2075.5 2076.37 2075.5 2076.37 0 0 935155 2075.49 2076.35 2075.49 2076.35 0 0 931751 2074.32 2075.25 2074.32 2075.25 0 0 925926 2073.78 2074.73 2073.78 2074.73 0 0 919776 2072.9 2073.8 2072.9 2073.8 0 0 6.0 Results /Conclusion A comparison of the Pre and Post - Project Model show that the proposed US -64 Float Fishing Access dock does not cause a rise in the 100 -year natural or floodway water surface elevations with the modifications shown in the attached work maps. These modifications include minor fill for the parking area /driveway, proposed dock, and excavation for the boat ramp. Ward Consulting Engineers, P.C. 13 US -64 Float Fishing Access July 2, 2015 French Broad River 7.0 Computer Models The following computer models have been included on a CD attached to this report. All models are for the floodway run and contain the 100 year natural and 100 year floodway profiles: Effective HEC -2 Model PDF copy of input data — Appendix A Effective created from HEC -2 Print -out: Project: French Broad FrenchBroad.prj Plan: Effective FrenchBroad.p01 Geometry: Effective FrenchBroad.g01 Steady Flow: Floodway FrenchBroad.f01 Corrected Effective: Project: French Broad FrenchBroad.prj Plan: Corrected Effective FrenchBroad.p02 Geometry: Corrected Effective FrenchBroad.g02 Steady Flow: Floodway CE FrenchBroad.f02 Pre - Project Final: Project: French Broad FrenchBroad.prj Plan: Pre - Project FrenchBroad.p03 Geometry: Pre - Project FrenchBroad.g03 Steady Flow: Floodway CE FrenchBroad.f02 Post - Project Final: Project: French Broad FrenchBroad.prj Plan: Post - Project FrenchBroad.p04 Geometry: Post - Project FrenchBroad.g04 Steady Flow: Floodway CE FrenchBroad.f04 Ward Consulting Engineers, P.C. 14 US -64 Float Fishing Access July 2, 2015 French Broad River ENGINEERING "NO IMPACT" CERTIFICATION This is to certify that I am a duly qualified engineer licensed to practice in the State of North Carolina. It is to further certify that the attached technical data supports the fact that the improvements to the Etowah Small Boat Access located on the east bank of the French Broad River at Station 9354 in Henderson County, NC will not impact the 100 - year flood elevations, floodway elevations, and floodway widths on Buffalo Creek. This certification includes the proposed Etowah Small Boat Access improvements planned by the NC Wildlife Resources Commission as shown on the attached work maps prepared by Ward Consulting Engineers, P.C. dated 7/2/2015. %Iiff"14V ! v rr < 9 r Signature: :Q = Becky L. W d, P.E. - SEAS • 13344 - Ward Consulting Engineers, P.C. Firm No C -2619 Company President Title 4805 Green Road, Suite 100 Street Address Raleigh, North Carolina, 27616 City, State, Zip 919 - 870 -0526 Phone Etowah - French Broad River Photo Loq Picture 1.0 — Northern side of the US -64 Bridge looking southwest. Picture 2.0 — Project site. Picture 3.0 — Project site looking southwest at US -64 bridge. Picture 4.0 — French Broad River looking north from US -64 Bridge at the railroad bridge. Picture 5.0 — Project site as viewed from US -64 Bridge looking northeast. Appendix A — Effective HEC -2 Model & FIS Report Data FLOOD INSURANCE STUDY A Report of Flood Hazards in HENDERSON COUNTY, NORTH CAROLINA AND INCORPORATED AREAS Henderson County Fletcher, Town of Henderson County (Unincorporated Areas) Hendersonville, City of Laurel Park, Town of Mills River, Town of 370568 370125 370128 370384 370025 FEMA'S 040PERATING TECHNICAL PARTNER October 2, 2008 French Broad French Broad, Broad French Bread French Broad French Broad pry,,. Federal Emergency Management Agency4 ° State of North Carolina Flood Insurance Study Number `Z )VD s� 37089CVOOOA www.fema.gov and www.ncfloodmaps.com Section 5.0 - Engineering Methods Table 8- Summary of Discharges Mile 166.9 below f Cane Creek 633 22,000 39,000 48,500 73,000 French Broad Mile 166.9 above Cane Creek 546 20,600 36,600 46,000 69,000 River Mile 168.5 above Mud 432 -- 18,500 33,000 41,500 63,000 Creek Mile 169.2 above Mill 357 17,000 30,600 38,000 58,500 River At the confluence with 2.9 * * 1,440 French Broad River Gash Creek Approximately 1,000 feet upstream of US 1.1 * * 770 Route 64 - At the Henderson 1 -- 74.9 * * 12,830 Polk County boundary i At Interstate 26 50.1 9,980 Approximately 0.8 mile downstream of 43.4 * * 9,120 US Route 176 Approximately 0.8 mile upstream of 39.7 * * 8,630 Railroad Approximately 0.6 - - - mile upstream of S. 33.7 4,{]50 6,510 7,780 11,100 Lake Summit Road (SR 1852) Approximately 400 feet downstream of 33.5 4,020 6,500 7,760 111060 NC Route 225 Approximately 900 Green River feet upstream of NC 31.3 3,860 6,230 7,440 10,620 Route 225 Approximately 0.9 mile upstream of Riverwood Drive 30.6 3,800 6,140 7,,330 10,490 (SR 1290) At US Route 25 25.9 - - 3,400 5,520 6,610 9,470 Approximately 1,900 feet upstream of Terrys Greek Road 75.5 3,370 5,480 6,570 9,410 (SR 1103) Approximately 0.5 mile upstream of Terrys Creek Road 20.9 2,950 4,810 5,780 8,310 (SR 1103) Approximately 1.4 miles upstream of Terrys Creek Road 19.9 2,860 4,660 5,600 8,080 (SR 1103) Flood Insurance Study Report: Henderson County, North Carolina and incorporated Areas Page 30 October 2, 2008 FLOODING SOURCE CROSS SECTION French Broad River 8686 8709 8731 8754 8766 8823 8842 8907 9014 9068 9134 9149 9198 9250 9348 9353 9390 9433 9517 9547 9617 9673 9701 9742 1 Feet above mouth r M w DISTANCE' 868,560 870,936 873,100 875,371 876,586 882,288 884,189 890,736 901,402 906,840 913,440 914,918 919,776 925,056 934,771 935,3'52 939,048 943,272 951,720 954,730 961,752 967,296 970],094 974,160 WIDTH (FEET) 555 610 1,050 1,700 1,800 1,300 1,910 3,320 2,600 1,500 1,560 630 960 1,790 730 1,120 620 1,060 1,900 1,160 1,650 1,700 1,580 890 FEDERAL EMERGENCY MANAGEMENT AGENCY FLOODWAY BASE FLOOD WATER - SURFACE ELEVATION (FEET NAVD 88) SECTION MEAN 1.0 AREA VELOCITY 0.9 (SQUARE (FEET PER REGULATORY FEET) SECOND) 0.9 8,916 5.5 2,055.6 10,786 4.5 2,057.9 18,144 2.7 2,060.0 29,802 1.6 2,060.3 28,624 1.7 2,060.4 20,963 2.2 2,061.1 28,141 1.6 2,061.5 43,874 0.9 2,062.3 29,984 1.3 2,065.0 17,405 2.2 2,066.5 17,685 2.1 2,068.2 8,048 4.6 2,071.0 15,132 2.5 2,072.9 25,021 1.5 2,073.7 12,752 2.9 2,075.3 15,853 2.3 2,077.3 8,215 4.4 2,078.6 16,650 2.2 2,080.2 24,370 1.5 2,081.0 13,252 2.7 2,082.6 22,679 1.6 2,084.8 21,445 1.7 2,086.2 20,393 1.7 2,087.3 12,340 2.9 2,088.0 HENDERSO►N COUNTY, NC AND INCORPORATED AREAS WITHOUT WITH INCREASE FLOODWAY FLOODWAY 2,055.6 2,056.6 1.0 2,057.9 2,058.8 0.9 2,060.0 2,060.8 0.8 2,060.3 2,061.2 0.9 2,060.4 2,061.3 0.9 2,061.1 2,062.0 0.9 2,061.5 2,062.5 1.0 2,062.3 2,063.3 1.0 2,065.0 2,065.8 0.8 2,066.5 2,067.3 0.8 2,068.2 2,069.0 0.8 2,071.0 2,071.6 0.6 2,072.9 2,073.8 0.9 2,073.7 2,074.7 1.0 2,075.3 2,076.3 1.0 2,077.3 2,078.0 0.7 2,078.6 2,079.2 0.6 2,080.2 2,081,1 0.9 2,081.01 2,082.0 1.0 2,082.6 2,083.1 0.5 2,084.8 2,085.6 0.8 2,086.2 2,087.0 0.8 2,087.3 2,088.1 0.8 2,088.0 2,088.7 0.7 FLOODWAY DATA FRENCH BROAD RI'V'ER 11 ON _a ON ARM : 1�� :. .r© ar ■ milli *Yr Y +Y.Ai - 1* --rYMY Y* M Y 5�fT�1�.'Tt �+� �IYY•�. -M YYYM Y ,LC2Y � �FCEASEi?4TE0 %4OV 76 UP DAIEP FE -6 1978 ERR +III C: j017 i3'ESt]Z 'OOE *7'9502 CIO? 9065:3? 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NC 0 ti 44 c .094 01.048 4),I '1.5 vT C'i. 15761. 78966. 3 593ti. r:s56 9 i5g35'_ ir1r,11_ 'e_ _ 600000 FEET 590000 FEET 930000 FEET 35 °20'30 "N 35 °20'0 "N 35'19'30"N 940000 FEET 82 °35'0 "W 82 °34'30 "W 82 °34'0 "W 82 °33'30 "W 82 °35'0 "W 82 °34'30 "W 82 °34'0 "W 82 °33'30 "W 930000 FEET FLOOD HAZARD INFORMATION SEE FIS REPORT FOR ZONE DESCRIPTIONS AND INDEX MAP THE INFORMATION DEPICTED ON THIS MAP AND SUPPORTING DOCUMENTATION ARE ALSO AVAILABLE IN DIGITAL FORMATAT HTTP: / /FRIS.NC.GOV /FRIS Without Base Flood Elevation (BFE) Zone A, V, A99 With BFE or Depth zone AE, AO, AH, VE, AR SPECIAL FLOOD x Regulatory Floodway HAZARD AREAS 9640 9650 0.2% Annual Chance Flood Hazard, Areas 9670 of 1% Annual Chance Flood with Average 9690 0600 0610 0620 Depth Less Than One Foot or With Drainage Areas of Less Than One Square Mile zone x Future Conditions 1% Annual Chance Flood Hazard zone x OTHER AREAS _ �` Area with Reduced Flood Risk due to Levee FLOOD HAZARD D See Notes zone x OTHER Areas Determined to be Outside the AREAS 0.2% Annual Chance Floodplain zone x ------- - - - - -- Channel, Culvert, or Storm Sewer ' ' ' ' . Accredited or Provisionally Accredited GENERAL Levee, Dike, or Floodwall STRUCTURES Non - accredited Levee, Dike, or Floodwall BM5510 X North Carolina Geodetic Survey bench mark BM5510 ® National Geodetic Survey bench mark BM5510� Contractor Est. NCFMP Survey bench mark 9538 Cross Sections with 1% Annual Chance 9558 Water Surface Elevation (BFE) sa - - - - - Coastal Transect - -- - -- Coastal Transect Baseline � Profile Baseline Hydrographic Feature OTHER Limit of Study FEATURES Jurisdiction Boundary NOTES TO USERS For information and questions about this map, available products associated with this FIRM including historic versions of this FIRM, how to order products or the National Flood Insurance Program in general, please call the FEMA Map Information eXchange at 1- 877 -FEMA -MAP (1- 877 - 336 -2627) or visit the FEMA Map Service Center website at http: / /msc.fema.gov. An accompanying Flood Insurance Study report, Letter of Map Revision (LOMR) or Letter of Map Amendment (LOMA) revising portions of this panel, and digital versions of this FIRM may be available. Visit the North Carolina Floodplain Mapping Program website at http: / /www.ncf[oodmaps.com or contact the FEMA Map Service Center. Communities annexing land on adjacent FIRM panels must obtain a current copy of the adjacent panel as well as the current FIRM Index. These may be ordered directly from the Map Service Center at the number listed above. For community and countywide map dates refer to the Flood Insurance Study report for this jurisdiction. To determine if flood insurance is available in the community, contact your Insurance agent or call the National Flood Insurance Program at 1- 800 - 638 -6620. Base map information shown on this FIRM was provided in digital format by the North Carolina Floodplain Mapping Program (NCFMP). The source of this information can be determined from the metadata available in the digital FLOOD database and in the Technical Support Data Notebook (TSDN). ACCREDITED LEVEE NOTES TO USERS: If an accredited levee note appears on this panel check with your local community to obtain more information, such as the estimated level of protection provided (which may exceed the 1- percent - annual- chance level) and Emergency Action Plan, on the levee system(s) shown as providing protection. To mitigate flood risk in residual risk areas, property owners and residents are encouraged to consider flood insurance and floodproofing or other protective measures. For more information on flood insurance, interested parties should visit the FEMA Website at http: / /www.fema.gov /business /nfip /index.shtm. PROVISIONALLY ACCREDITED LEVEE NOTES TO USERS: If a Provisionally Accredited Levee (PAL) note appears on this panel, check with your local community to obtain more information, such as the estimated level of protection provided (which may exceed the 1- percent - annual- chance level) and Emergency Action Plan, on the levee system(s) shown as providing protection. To maintain accreditation, the levee owner or community is required to submit the data and documentation necessary to comply with Section 65.10 of the NFIP regulations. If the community or owner does not provide the necessary data and documentation or if the data and documentation provided indicates the levee system does not comply with Section 65.10 requirements, FEMA will revise the flood hazard and risk information for this area to reflect de- accreditation of the levee system. To mitigate flood risk in residual risk areas, property owners and residents are encouraged to consider flood insurance and floodproofing or other protective measures. For more information on flood insurance, interested parties should visit the FEMA Website at http: / /www.fema.gov /business /nfip /index.shtm. LIMIT OF MODERATE WAVE ACTION NOTES TO USERS: For some coastal flooding zones the AE Zone category has been divided by a Limit of Moderate Wave Action (LiMWA). The LiMWA represents the approximate landward limit of the 1.5 -foot breaking wave. The effects of wave hazards between the VE Zone and the LiMWA (or between the shoreline and the LiMWA for areas where VE Zones are not identified) will be similar to, but less severe than those in the VE Zone. Limit of Moderate Wave Action (LiMWA) COASTAL BARRIER RESOURCES SYSTEM (CBRS) NOTE This map may include approximate boundaries of the CBRS for informational purposes only. Flood insurance is not available within CBRS areas for structures that are newly built or substantially improved on or after the date(s) indicated on the map. For more information see http:// www. fws. gov/ habitatconservation /coastal_barrier.htmi, the FIS Report, or call the U.S. Fish and Wildlife Service Customer Service Center at 1- 800 - 344 -WILD. CBRS Area r,\ � \ ; ,\r Otherwise Protected Area SCALE Map Projection: North Carolina State Plane Projection Feet (Zone 3200) Datum: NAD 1983 (Horizontal), NAVD 1988 (Vertical) 1 inch = 500 feet 0 250 500 1,000 Feet Meters 0 75 150 300 PANEL LOCATOR 1:6,000 BUNCOMBE COUNTY 615 8694 9604 9614 9674968,4. 969;4 0604 0614 0624 J ✓ —9 961-3,,9623-9633,19643-965-3--966,8' 9673 9683 9693 0603 0613 0623 8692 �' L 9612 9622 9632 9642 9652 9662 9672 9682 9692 0602 0612 0622 9611 9621 9631 9641 9651 9661 9671 9681 9691 0601 0611 9610 9620 9630 9640 9650 9660 9670 9680 9690 0600 0610 0620 r % 9509'9519 9529 9535 9549 9559 9569 9579 9589 9599 0508, 9518 9528 9538 9548 9558 9568 9578 9588 9598 �, r � r 9537 9547 9557 9567 9577 9587 9597 19527 10507 o,, i — 9526 9536 9546 9556 9566 9576 9586 9596 10506 i 9525 9555 9565 9575 9585 95951 POLK COUNTY TRANSYLVANIA COUNTY 9534 9524 9554 9564 9574/9584195941 I 9543 9562 9592 35 °20'30 "N 35 °20'0 "N 35'19'30"N 940000 FEET 600000 FEET 590000 FEET FEW'S CQLSPEnA'r1NG TECHNICAL PAgiNEq This digital Flood Insurance Rate Map (FIRM) was produced through a unique cooperative partnership between the State of North Carolina and the Federal Emergency Management Agency (FEMA). The State of North Carolina has implemented a long term approach to floodplain management to decrease the costs associated with flooding. This is demonstrated by the State's commitment to map flood hazard areas at the local level. As a part of this effort, the State of North Carolina has joined in a Cooperating Technical State agreement with FEMA to produce and maintain this digital FIRM. NORTH CAROLINA FLOODPLAIN MAPPING PROGRAM NATIONAL FLOOD INSURANCE PROGRAM cc FLOOD INSURANCE RATE MAP NORTH CAROLINA o o PANEL 9539 cc Panel Contains: COMMUNITY CID PANEL SUFFIX HENDERSON COUNTY 370125 9539 J MILLS RIVER, TOWN OF 370025 9539 J 0 0 U. cc a .0 4_1 M Z MAP NUMBER 3700953900J MAP REVISED 10/2/2008 Appendix B — Flood Study Work Map �r� I J I'l F� z_ Z, �Q 'EFFECTIVE FLOODPLAIN o • O 0� O � u �, i Q b� o a Y2 �� '�;i� • Ili ;� �� hA O 500 -YEgR IN PROJECT SITE l F rr I, /J I,w II �� o V L\ "I IS ` �............. / 1\6 N, op ffl- LEGEND NOTE: DATA FROM NC- FLOODMAPS. • co M r 1 Nro Lo • O L" 00 rl- r- 0000 0-)0-) O N 0-) N 4� r- i.y N •'.y —I U U Q V) J w U) 0 �(3) O C)U y1.�� 0 _ WUN 00Z =� I W O Lj •�yU �= of wZz cn co LJ z 00 Q! C� 0 VFW �U �Lu �U) z J 0 z w Ld W U U U �J z => Lo o Lr- oo LL rrrrrrlrtr�� N z — �_ J O c X cn U ww w or O.j J F- O Q or pQjr O Q Z 0aw > ImZO m= Co>- z MO U LL� O zq O c z LL cn p O O cn O cr J W LL p z w DATE: 7 -2 -2015 REVISIONS: FEMA EFFECTIVE STREAM CENTERLINE FEMA EFFECTIVE FLOODWAY PROJECT NAME: ETOWAH BASE FEMA EFFECTIVE 100 -YEAR FLOODPLAIN FEMA EFFECTIVE 500 -YEAR FLOODPLAIN DWG NAME: FEMA CROSS SECTION OVERALL EXHIBIT SCALE: 1' = 600' SHEET NO. 600 300 0 600 1200 SCALE 1' =600' 1 / � OODPILAIN 00 -YEAR o r FFECTIVE 500 -YEAR LOODPLAIN 00 4w* ♦_ �,Z 1 1 1 1 1 1 ♦ 1 r Z �♦ 1 A p�1 ' ♦I I ter♦ ♦� I I � INEFFECTIVE FLOW 9> S Is C7 0 1 / 1/ ADJUSTED FLOODWAY 9� \9 \ co M � "" O Ln I I O O 0000 mo-) o N MOD Lo ► a� x N l w Z 0 1 �0-) O �cf) Ll)U >► WUCV 0 0 Z = .■I I c p • I�■I , W O U ±w �= Y z z o m 1 v �(W � QwQ w► Ld z W OU �� w J U U Q) z > o 0 �G:f oc) 0:� O o O I l , ; pv:�4�� dam• =V : m = D � , APPROXIMA C I OFF RA � TMENT NO t UST — NC FLOODMAPS EFFECTIVE FLOODWAY 4e - U c Q i AD S FLOODWAY / ♦♦ // ,iii ' / /� I �9SS2�686 U / ♦ / / /�/ /` / I SI FERIA CROSS SE�,TION � 04 PROJECT ♦ / / /ir // � � r ��r�' �*� x � ' ♦ / /iii J i r "r6; /♦ .. ` �. .. / ♦ ♦ NO \kLDLIFE TOPO AREA Im Now / /// yam,// / / •-' — ` .n / ♦ �� \. Q � �� / /// /rte � �j / /ii li ® . � )� � _ - __ Iftft O 00 � v - � /�I +J / \ \�/ . Ire - •• ..._ �� / /�� /I �; .. _ \\ \, -_ _ - r n -J<— C / / /// //1//// —� �• E \ �� 1\ l \ wo ooft .1". AVI 0 Co_ >` LL - 77 Z. C� Cn �, � Q w AP OXIMATE LOCATION OF US -64 r r r r r BRIDGE ENTS AND PIERS SURVEYED LOCATION US - 64 � 'r r ABUTMENTS AND PIERS © rrr o ' ♦ :1 CO C AD U J ♦♦ L 000 loop �'' / I ♦ r ' A DATE: 7 -2 -2015 _ _ I ♦ NOTES: REVISIONS: J/ ♦ 1. SURVEY TOPOGRAPHY INFORMATION BY NC WILDLIFE RESOURCES COMMISSION IN PROJECT AREA. G HORIZONTAL NAD83 VERTICAL NAVD88 2. TOPOGRAPHY SUPPLEMENTED AROUND PROJECT AREA FROM NC FLOODMAPS. LEGEND NC FLOODMAPS OF ♦ / NC WILDLIFE SURVEYED TOPO Lr r to i iVE STREAM CENTERLINE ♦ i ♦ NC FLOODMAPS LIDAR PROJECT NAME: 4 /Q NC FLOODMAPS STREAM CENTERLINE FLOOD STUDY = NC FLOODMAPS FLOODWAY DWG NAME: _ C q / ADJUSTED FLOODWAY FLOOD STUDY AREA WORKMAP - - Q p ♦ EFFECTIVE 100 -YEAR FLOODPLAIN SCALE: - - - - - - - - - - EFFECTIVE 500 -YEAR FLOODPLAIN 1 ' = 100' ♦ FEMA CROSS SECTION _ ♦ CROSS SECTION SHEET NO. _ ( - EXPANSION AND CONTRACTION LIMITS (INEFFECTIVE FLOW) 100 50 0 100 200 ♦ SCALE 1' =100' 2 Appendix C — Cross Section Comparison Existing and Proposed 2095 2090 2085 2080 2075 c °- 2070 w 2065 2060 2055 2050 2045 800 900 1000 1100 1200 Cross Section 935409 y 1300 1400 1500 1600 1700 1800 1900 2000 2100 2200 Station (ft) -41—XS 935409 Pre- Project --♦•XS 935409 Post- Project 2095 2090 2085 2080 2075 c °— 2070 v w 2065 2060 2055 2050 2045 800 900 1000 1100 1200 Cross Section 935431 7 1300 1400 1500 1600 1700 1800 1900 2000 2100 2200 Station (ft) —41—XS 935431 Pre - Project --*—XS 935431 Post- Project Cross Section 935466 2095 2090 2085 t 2080 7� 2075 c 0 2070 v w 2065 2060 2055 2050 2045 0 100 200 300 400 500 600 700 800 900 1000 1100 1200 1300 1400 1500 1600 1700 1800 1900 2000 Station (ft) --*--XS 935466 Pre - Project f XS 935466 Post - Project Cross Section 935553 2090 2085 2080 2075 F 2070 C w 2065 2060 2055 2050 2045 ' 200 300 400 500 600 700 800 900 1000 1100 1200 1300 1400 Station (ft) --*—XS 935553 Pre - Project --0 XS 935553 Post - Project I I I 7 � CS' 1500 1600 1700 1800 Appendix D — HEC -RAS Model Output Tables Effective Model 100 -year & Floodway IEC -RAS Plan: Eff River: French Broad Reach: French Broad Profile: 100 -yr Reach River Sta Profile Sta W.S. Lft Sta W.S. Rgt Q Total Min Ch El W.S. Elev Crit W.S. E.G. Elev E.G. Slope Vel Chnl Flow Area Top Width Froude # Chi (ft) (ft) (cfs) (ft) (ft) (ft) (ft) (ft/ft) (ft/s) (sq ft) (ft) French Broad 180.8200 100 -yr 279.75 252.52 223.41 606.75 1240.81 1415.00 1415.00 Bridge 1415.40 1415.13 882.15 1013.45 1015.05 Bridge 1016.11 1015.50 1015.49 106.76 99.66 66.31 1780.35 2688.98 1683.84 1370.32 2744.89 2530.00 2530.00 2530.00 2530.00 1864.22 1744.49 1740.41 1738.11 1740.26 1851.31 2200.99 2208.25 1325.79 36004.00 36099.00 36374.00 36512.00 36512.00 36512.00 36512.00 36512.00 36512.00 36512.00 36651.00 36651.00 36651.00 36651.00 36651.00 36968.00 36968.00 37140.00 2054.90 2055.201 2052.501 2050.401 2050.801 2052.001 2052.001 2052.001 2052.001 2050.101 2050.101 2050.101 2050.101 2050.101 2050.101 2048.801 2046.501 2044.60 2081.93 2081.44 2080.73 2079.22 2078.04 2077.31 2077.22 2076.92 2076.94 2076.98 2076.65 2075.77 2075.24 2075.61 2075.62 2074.23 2073.77 2072.90 2067.75 2067.75 2070.17 2070.17 2063.09 2082.11 2081.47 2080.81 2079.58 2078.16 2078.08 2078.07 2077.80 2077.76 2077.18 2077.01 2076.93 2076.50 2076.12 2076.04 2074.30 2073.82 2073.05 0.000522 0.000094 0.000164 0.000696 0.000339 0.001607 0.003769 0.003998 0.001723 0.000566 0.001016 0.002806 0.003130 0.001505 0.001191 0.000194 0.000110 0.000221 5.01 2.21 3.43 6.08 3.76 7.63 7.79 7.94 7.81 5.23 6.61 10.72 11.14 7.81 7.30 3.32 3.13 4.62 13599.58 28570.20 20434.70 9608.61 16352.91 5711.25 5281.24 5173.40 5573.19 12132.80 9033.93 6200.17 5924.64 8279.56 9321.92 22847.70 26702.70 16921.98 1500.60 2436.46 1460.43 763.57 1504.08 375.00 363.00 362.60 374.87 982.08 731.03 515.36 511.99 724.76 835.83 2094.23 2108.59 1259.48 0.18 0.08 0.12 0.22 0.14 0.30 0.33 0.34 0.31 0.19 0.24 0.39 0.41 0.29 0.27 0.13 0.12 0.16 French Broad 180.2500 100 -yr French Broad 178.6500 100 -yr French Broad 177.8500 100 -yr French Broad 177.2326 100 -yr French Broad 177.2288 100 -yr French Broad 177.2278 100 -yr French Broad 177.2250 French Broad 177.2222 100 -yr French Broad 177.2212 100 -yr French Broad 177.1716 100 -yr French Broad 177.1244 100 -yr French Broad 177.1242 100 -yr French Broad 177.1214 French Broad 177 .1186 100 - yr French Broad 177.1184 100 -yr French Broad 177.1127 100 -yr French Broad 176.3000 100 -yr French Broad 175.2000 100 -yr French Broad 174.2000 100 -yr You created this PDF from an application that is not licensed to print to novaPDF printer (http: / /www.nova dp f.com) IEC -RAS Plan: Eff River: French Broad Reach: French Broad Profile: FW Reach River Sta Profile Sta W.S. Lft Sta W.S. Rgt Q Total Min Ch El W.S. Elev Crit W.S. E.G. Elev E.G. Slope Vel Chnl Flow Area Top Width Froude # Chi (ft) (ft) (cfs) (ft) (ft) (ft) (ft) (ft/ft) (ft/s) (sq ft) (ft) French Broad 180.8200 FW 661.00 713.00 471.00 819.00 1352.00 1415.00 1415.00 Bridge 1416.00 1416.00 990.00 1014.00 1016.00 Bridge 1016.50 1016.00 1016.00 180.00 180.00 202.00 1780.00 2612.00 1524.00 1370.00 2502.00 2529.00 2529.00 2529.00 2529.00 1645.00 1736.00 1736.00 1736.00 1736.00 1735.00 1973.00 1973.00 1154.00 36004.00 36099.00 36374.00 36512.00 36512.00 36512.00 36512.00 36512.00 36512.00 36512.00 36651.00 36651.00 36651.00 36651.00 36651.00 36968.00 36968.00 37140.00 2054.90 2055.201 2052.501 2050.401 2050.801 2052.001 2052.001 2052.001 2052.001 2050.101 2050.101 2050.101 2050.101 2050.101 2050.101 2048.801 2046.501 2044.60 2082.95 2082.46 2081.63 2079.88 2078.64 2078.00 2077.91 2077.61 2077.63 2077.52 2077.36 2076.59 2076.15 2076.48 2076.46 2075.17 2074.72 2073.80 2067.75 2067.75 2070.17 2070.17 2063.11 2083.15 2082.50 2081.74 2080.33 2078.78 2078.71 2078.69 2078.41 2078.37 2077.84 2077.68 2077.60 2077.24 2076.91 2076.86 2075.24 2074.78 2073.98 0.000514 0.000097 0.000197 0.000775 0.000342 0.001418 0.003297 0.003493 0.001515 0.000775 0.000856 0.002390 0.002600 0.001213 0.001058 0.000185 0.000109 0.000234 5.10 2.31 3.84 6.54 3.85 7.31 7.47 7.61 7.47 6.21 6.19 10.12 10.43 7.19 7.05 3.34 3.20 4.86 12286.79 25734.29 17020.38 8197.71 14864.26 5965.01 5529.04 5417.42 5825.46 9488.60 9537.44 6613.67 6391.17 8903.40 9272.90 21805.29 25117.18 14939.17 1119.00 1899.00 1053.00 551.00 1150.00 374.00 362.00 361.00 373.00 655.00 722.00 510.00 509.50 720.00 719.00 1793.00 1793.00 952.00 0.17 0.08 0.13 0.24 0.14 0.28 0.31 0.32 0.29 0.22 0.22 0.36 0.38 0.26 0.25 0.13 0.12 0.16 French Broad 180.2500 FW French Broad 178.6500 FW French Broad 177.8500 FW French Broad 177.2326 FW French Broad 177.2288 FW French Broad 177.2278 FW French Broad 177.2250 French Broad 177.2222 FW French Broad 177.2212 FW French Broad 177.1716 FW French Broad 177.1244 FW French Broad 177.1242 FW French Broad 177.1214 French Broad 177.1186 FW French Broad 177.1184 FW French Broad 177.1127 FW French Broad 176.3000 FW French Broad 175.2000 FW French Broad 174.2000 FW You created this PDF from an application that is not licensed to print to novaPDF printer (http: / /www.nova dp f.com) Corrected Effective Model 100 -year & Floodway IEC -RAS Plan: CorEff River: French Broad Reach: French Broad Profile: 100 -yr Reach River Sta Profile Sta W.S. Lft Sta W.S. Rgt Q Total Min Ch El W.S. Elev Crit W.S. E.G. Elev E.G. Slope Vel Chnl Flow Area Top Width Froude # Chi (ft) (ft) (cfs) (ft) (ft) (ft) (ft) (ft/ft) (ft/s) (sq ft) (ft) French Broad 954729 100 -yr 278.56 249.47 221.56 603.36 1236.71 1415.00 1415.00 Bridge 1415.00 1415.00 1 631.50 1013.07 1015.00 Bridge 1016.35 1015.72 1015.73 106.53 99.56 66.31 1782.43 2689.06 1684.40 1373.31 2750.03 2530.00 2530.00 2530.00 2530.00 1813.99 1745.28 1740.52 1737.60 1739.81 1850.14 2201.32 2208.30 1325.79 36004.00 36099.00 36374.00 36512.00 36512.00 36512.00 36512.00 36512.00 36512.00 36512.00 36651.00 36651.00 36651.00 36651.00 36651.00 36968.00 36968.00 37140.00 2054.90 2055.201 2052.501 2050.401 2050.801 2052.001 2052.001 2052.001 2052.001 2050.001 2050.101 2050.101 2050.101 2050.101 2050.101 2048.801 2046.501 2044.60 2082.05 2081.68 2080.99 2079.61 2078.38 2077.56 2077.46 2077.14 2077.16 2077.04 2076.84 2075.80 2075.12 2075.50 2075.49 2074.32 2073.78 2072.90 2067.20 2067.75 2067.75 2067.20 2069.66 2070.17 2070.17 2069.80 2063.09 2082.22 2081.71 2081.06 2079.95 2078.51 2078.31 2078.28 2078.00 2077.95 2077.39 2077.19 2076.95 2076.41 2076.03 2075.95 2074.38 2073.84 2073.05 0.000504 0.000088 0.000156 0.000641 0.000352 0.001533 0.003594 0.003828 0.001653 0.000774 0.000969 0.002792 0.003208 0.001546 0.001262 0.000189 0.000109 0.000221 4.94 2.15 3.36 5.91 3.87 7.50 7.67 7.83 7.70 6.05 6.49 10.70 11.24 7.89 7.49 3.29 3.13 4.62 13780.03 29165.42 20806.17 9907.57 14731.99 5807.29 5369.33 5252.53 5654.95 9333.74 9176.43 6212.50 5864.31 8199.24 8800.75 23019.51 26729.98 16921.98 1503.87 2439.59 1462.84 769.95 1513.33 375.00 363.00 363.00 375.00 1182.50 732.21 515.51 511.25 724.09 834.41 2094.78 2108.73 1259.48 0.17 0.08 0.12 0.21 0.14 0.29 0.32 0.33 0.30 0.21 0.23 0.39 0.42 0.29 0.28 0.13 0.12 0.16 French Broad 951720 100 -yr French Broad 943272 100 -yr French Broad 939048 100 -yr French Broad 935788 100 -yr French Broad 935768 100 -yr French Broad 935763 100 -yr French Broad 935748 French Broad 935733 100 4 French Broad 935728 100 -yr French Broad 935466 100 -yr French Broad 935217 100 -yr French Broad 935216 100 -yr 1 French Broad 935201 French Broad 935186 100 4 French Broad 935185 100 -yr French Broad 935155 100 -yr French Broad 931751 1 oo -yr French Broad 925926 100 -yr French Broad 919776 100 -yr You created this PDF from an application that is not licensed to print to novaPDF printer (http: / /www.nova dp f.com) IEC -RAS Plan: CorEff River: French Broad Reach: French Broad Profile: FW Reach River Sta Profile Sta W.S. Lft Sta W.S. Rgt Q Total Min Ch El W.S. Elev Crit W.S. E.G. Elev E.G. Slope Vel Chnl Flow Area Top Width Froude # Chi (ft) (ft) (cfs) (ft) (ft) (ft) (ft) (ft/ft) (ft/s) (sq ft) (ft) French Broad 954729 FW 661.00 713.00 471.00 819.00 1352.00 1415.00 1415.00 Bridge 1416.00 1416.00 990.00 1014.00 1016.00 Bridge 1016.50 1016.00 1016.00 180.00 180.00 202.00 1780.00 2612.00 1524.00 1370.00 2502.00 2529.00 2529.00 2529.00 2529.00 1645.00 1736.00 1736.00 1736.00 1736.00 1735.00 1973.00 1973.00 1154.00 36004.00 36099.00 36374.00 36512.00 36512.00 36512.00 36512.00 36512.00 36512.00 36512.00 36651.00 36651.00 36651.00 36651.00 36651.00 36968.00 36968.00 37140.00 2054.90 2055.201 2052.501 2050.401 2050.801 2052.001 2052.001 2052.001 2052.001 2050.001 2050.101 2050.101 2050.101 2050.101 2050.101 2048.801 2046.501 2044.60 2083.01 2082.64 2081.80 2080.17 2078.94 2078.20 2078.10 2077.77 2077.79 2077.66 2077.50 2076.58 2076.04 2076.37 2076.35 2075.25 2074.73 2073.80 2067.20 2067.75 2067.75 2067.20 2069.67 2070.17 2070.17 2069.80 2063.11 2083.21 2082.67 2081.91 2080.60 2079.07 2078.89 2078.86 2078.56 2078.52 2078.01 2077.81 2077.60 2077.15 2076.81 2076.76 2075.32 2074.79 2073.98 0.000506 0.000093 0.000191 0.000732 0.000319 0.001368 0.003182 0.003385 0.001470 0.000756 0.000828 0.002393 0.002658 0.001244 0.001084 0.000181 0.000108 0.000234 5.07 2.27 3.80 6.41 3.75 7.22 7.38 7.53 7.40 6.08 6.11 10.13 10.51 7.26 7.12 3.32 3.20 4.86 12353.72 26070.42 17200.59 8359.27 15210.72 6040.34 5597.18 5476.82 5886.93 9263.23 9642.32 6610.31 6334.20 8826.59 9195.84 21950.62 25140.82 14939.17 1119.00 1899.00 1053.00 551.00 1150.00 374.00 362.00 361.00 373.00 655.00 722.00 510.00 509.50 720.00 719.00 1793.00 1793.00 952.00 0.17 0.08 0.13 0.23 0.14 0.27 0.30 0.31 0.28 0.21 0.22 0.36 0.38 0.26 0.26 0.12 0.12 0.16 French Broad 951720 FW French Broad 943272 FW French Broad 939048 FW French Broad 935788 FW French Broad 935768 FW French Broad 935763 FW French Broad 935748 French Broad 935733 FW French Broad 935728 FW French Broad 935466 FW French Broad 935217 FW French Broad 935216 FW French Broad 935201 French Broad 935186 FW French Broad 935185 FW French Broad 935155 FW French Broad 931751 FW French Broad 925926 FW French Broad 919776 FW You created this PDF from an application that is not licensed to print to novaPDF printer (http: / /www.nova dp f.com) Pre -Proj ect Model 100 -year & Floodway HEC -RAS Plan: Pre -Pros River: French Broad Reach: French Broad Profile: 100 -vr Reach River Sta Profile Sta W.S. Lft Sta W.S. Rgt Q Total Min Ch El W.S. Elev Crit W.S. E.G. Elev E.G. Slope Vel Chnl Flow Area Top Width Froude # Chi (ft) (ft) (cfs) (ft) (ft) (ft) (ft) (ft/ft) (ft/s) (sq ft) (ft) French Broad 954729 100 -yr 278.61 249.54 1 221.61 603.44 1236.86 1415.00 1415.00 Bridge 1415.00 1415.00 396.06 628.51 867.44 931.45 1 1013.07 1015.00 Bridge 1016.35 1 1015.72 1015.73 106.53 99.56 66.31 1782.34 2689.06 1684.38 1373.24 2749.84 2530.00 2530.00 2530.00 2530.00 1721.99 1814.07 1982.82 2020.42 1745.28 1740.52 1737.60 1739.81 1850.14 2201.32 2208.30 1325.79 36004.00 36099.00 36374.00 36512.00 36512.00 36512.00 36512.00 36512.00 36512.00 36512.00 36512.00 36512.00 36512.00 36651.00 36651.00 36651.00 36651.00 36651.00 36968.00 36968.00 37140.001 2054.90 2055.201 2052.501 2050.401 2050.801 2052.001 2052.001 2052.001 2052.001 2049.001 2050.001 2050.001 2050.001 2050.101 2050.101 2050.101 2050.101 2050.101 2048.801 2046.501 2044.601 2082.05 2081.68 2080.98 2079.61 2078.37 2077.55 2077.45 2077.12 2077.14 2077.20 2077.07 2077.03 2077.01 2076.84 2075.80 2075.12 2075.50 2075.49 2074.32 2073.78 2072.90 2067.20 2067.75 2067.75 2067.20 2069.66 2070.17 2070.17 2069.80 2063.09 2082.22 2081.71 2081.05 2079.94 2078.50 2078.30 2078.27 2077.98 2077.94 2077.48 2077.41 2077.38 2077.36 2077.19 2076.95 2076.41 2076.03 2075.95 2074.38 2073.84 2073.05 0.000504 0.000088 0.000156 0.000643 0.000353 0.001537 0.003604 0.003839 0.001657 0.000647 0.000769 0.000805 0.000766 0.000969 0.002792 0.003208 0.001546 0.001262 0.000189 0.000109 0.000221 4.94 2.15 3.36 5.91 3.88 7.51 7.68 7.84 7.71 5.59 6.03 6.14 5.99 6.49 10.70 11.24 7.89 7.49 3.29 3.13 4.62 13771.95 29151.13 20795.82 9900.42 14717.20 5801.98 5364.19 5247.47 5649.82 10482.56 9353.34 9201.03 9303.33 9176.43 6212.50 5864.31 8199.24 8800.75 23019.51 26729.98 16921.981 1503.72 2439.51 1462.77 769.80 1512.98 375.00 363.00 363.00 375.00 1325.93 1185.57 1115.39 1088.97 732.21 515.51 511.25 724.09 834.41 2094.78 2108.73 1259.48 0.17 0.08 0.12 0.21 0.14 0.29 0.32 0.33 0.30 0.20 0.21 0.22 0.21 0.23 0.39 0.42 0.29 0.28 0.13 0.12 0.161 French Broad 951720 100 -yr French Broad 943272 100 -yr French Broad 939048 100 -yr French Broad 935788 100 -yr French Broad 935768 100 -yr French Broad 935763 100 -yr French Broad 935748 French Broad 935733 100 4 French Broad 935728 100 -yr French Broad 935553 100 -yr French Broad 935466 100 -yr French Broad 935431 100 -yr French Broad 935409 100 -yr French Broad 935217 100 -yr French Broad 935216 100 -yr French Broad 935201 French Broad 935186 100 -yr French Broad 935185 100 -yr French Broad 935155 100 -yr French Broad 931751 100 -yr French Broad 925926 1 oo -yr French Broad 919776 100 -yr You created this PDF from an application that is not licensed to print to novaPDF printer (http: / /www.nova dp f.com) HEC -RAS Plan: Pre -Pros River: French Broad Reach: French Broad Profile: FW Reach River Sta Profile Sta W.S. Lft Sta W.S. Rgt Q Total Min Ch El W.S. Elev Crit W.S. E.G. Elev E.G. Slope Vel Chnl Flow Area Top Width Froude # Chi (ft) (ft) (cfs) (ft) (ft) (ft) (ft) (ft/ft) (ft/s) (sq ft) (ft) French Broad 954729 FW 661.00 713.00 471.00 819.00 1352.00 1415.00 1415.00 Bridge 1416.00 1416.00 948.00 990.00 998.00 1006.00 1014.00 1016.00 Bridge 1016.50 1016.00 1016.00 180.00 180.00 202.00 1780.00 2612.00 1524.00 1370.00 2502.00 2529.00 2529.00 2529.00 2529.00 1633.00 1645.00 1655.00 1660.00 1736.00 1736.00 1736.00 1736.00 1735.00 1973.00 1973.00 1154.00 36004.00 36099.00 36374.00 36512.00 36512.00 36512.00 36512.00 36512.00 36512.00 36512.00 36512.00 36512.00 36512.00 36651.00 36651.00 36651.00 36651.00 36651.00 36968.00 36968.00 37140.001 2054.90 2055.201 2052.501 2050.401 2050.801 2052.001 2052.001 2052.001 2052.001 2049.001 2050.001 2050.001 2050.001 2050.101 2050.101 2050.101 2050.101 2050.101 2048.801 2046.501 2044.601 2083.01 2082.63 2081.79 2080.16 2078.93 2078.18 2078.08 2077.74 2077.76 2077.75 2077.68 2077.64 2077.63 2077.50 2076.58 2076.04 2076.37 2076.35 2075.25 2074.73 2073.80 2067.20 2067.75 2067.75 2067.20 2069.67 2070.17 2070.17 2069.80 2063.11 2083.20 2082.66 2081.90 2080.59 2079.05 2078.87 2078.84 2078.54 2078.49 2078.10 2078.03 2078.00 2077.98 2077.81 2077.60 2077.15 2076.81 2076.76 2075.32 2074.79 2073.98 0.000507 0.000094 0.000191 0.000734 0.000321 0.001373 0.003195 0.003402 0.001478 0.000735 0.000752 0.000776 0.000739 0.000828 0.002393 0.002658 0.001244 0.001084 0.000181 0.000108 0.000234 5.08 2.27 3.80 6.41 3.76 7.23 7.39 7.55 7.41 6.05 6.07 6.12 5.98 6.11 10.13 10.51 7.26 7.12 3.32 3.20 4.86 12344.98 26053.73 17189.54 8351.47 15188.26 6032.30 5589.31 5467.30 5877.00 9441.61 9277.94 9199.73 9301.52 9642.32 6610.31 6334.20 8826.59 9195.84 21950.62 25140.82 14939.171 1119.00 1899.00 1053.00 551.00 1150.00 374.00 362.00 361.00 373.00 685.00 655.00 657.00 654.00 722.00 510.00 509.50 720.00 719.00 1793.00 1793.00 952.00 0.17 0.08 0.13 0.23 0.14 0.28 0.30 0.31 0.29 0.21 0.21 0.21 0.21 0.22 0.36 0.38 0.26 0.26 0.12 0.12 0.161 French Broad 951720 FW French Broad 943272 FW French Broad 939048 FW French Broad 935788 FW French Broad 935768 FW French Broad 935763 FW French Broad 935748 French Broad 935733 FW French Broad 935728 FW French Broad 935553 FW French Broad 935466 FW French Broad 935431 FW French Broad 935409 FW French Broad 935217 FW French Broad 935216 FW French Broad 935201 French Broad 935186 FW French Broad 935185 FW French Broad 935155 FW French Broad 931751 FW French Broad 925926 FW French Broad 919776 FW You created this PDF from an application that is not licensed to print to novaPDF printer (http: / /www.nova dp f.com) Post -Proj ect Model 100 -year & Floodway HEC -RAS Plan: Post -Prof River: French Broad Reach: French Broad Profile: 100 -yr Reach River Sta Profile Sta W.S. Lft Sta W.S. Rgt Q Total Min Ch El W.S. Elev Crit W.S. E.G. Elev E.G. Slope Vel Chnl Flow Area Top Width Froude # Chi (ft) (ft) (cfs) (ft) (ft) (ft) (ft) (ft/ft) (ft/s) (sq ft) (ft) French Broad 954729 100 -yr 278.68 249.64 221.68 603.55 1237.08 1415.00 1415.00 Bridge 1415.00 1415.00 396.07 629.62 1 867.46 931.45 1 1013.07 1015.00 Bridge 1016.35 1 1015.72 1015.73 106.53 99.56 66.31 1782.21 2689.05 1684.36 1373.14 2749.57 2530.00 2530.00 2530.00 2530.00 1721.99 1814.04 1941.42 1999.00 1745.28 1740.52 1737.60 1739.81 1850.14 2201.32 2208.30 1325.79 36004.00 36099.00 36374.00 36512.00 36512.00 36512.00 36512.00 36512.00 36512.00 36512.00 36512.00 36512.00 36512.00 36651.00 36651.00 36651.00 36651.00 36651.00 36968.00 36968.00 37140.001 2054.90 2055.201 2052.501 2050.401 2050.801 2052.001 2052.001 2052.001 2052.001 2049.001 2050.001 2050.001 2050.001 2050.101 2050.101 2050.101 2050.101 2050.101 2048.801 2046.501 2044.601 2082.04 2081.67 2080.97 2079.59 2078.35 2077.53 2077.43 2077.11 2077.13 2077.19 2077.06 2077.02 2077.01 2076.84 2075.80 2075.12 2075.50 2075.49 2074.32 2073.78 2072.90 2067.20 2067.75 2067.75 2067.20 2069.66 2070.17 2070.17 2069.80 2063.09 2082.21 2081.70 2081.04 2079.93 2078.48 2078.28 2078.25 2077.97 2077.92 2077.47 2077.41 2077.39 2077.36 2077.19 2076.95 2076.41 2076.03 2075.95 2074.38 2073.84 2073.05 0.000505 0.000089 0.000156 0.000644 0.000354 0.001542 0.003618 0.003853 0.001663 0.000590 0.000631 0.000555 0.000766 0.000969 0.002792 0.003208 0.001546 0.001262 0.000189 0.000109 0.000221 4.95 2.15 3.36 5.92 3.88 7.52 7.69 7.85 7.72 5.34 5.46 5.52 5.99 6.49 10.70 11.24 7.89 7.49 3.29 3.13 4.62 13761.30 29131.47 20781.89 9890.65 14697.00 5794.66 5357.01 5240.56 5642.59 10547.55 9416.88 9434.38 9303.33 9176.43 6212.50 5864.31 8199.24 8800.75 23019.51 26729.98 16921.981 1503.53 2439.41 1462.68 769.59 1512.49 375.00 363.00 363.00 375.00 1325.92 1184.42 1073.96 1067.54 732.21 515.51 511.25 724.09 834.41 2094.78 2108.73 1259.48 0.17 0.08 0.12 0.21 0.14 0.29 0.32 0.33 0.30 0.19 0.19 0.20 0.21 0.23 0.39 0.42 0.29 0.28 0.13 0.12 0.161 French Broad 951720 100 -yr French Broad 943272 100 -yr French Broad 939048 100 -yr French Broad 935788 100 -yr French Broad 935768 100 -yr French Broad 935763 100 -yr French Broad 935748 French Broad 935733 100 4 French Broad 935728 100 -yr French Broad 935553 100 -yr French Broad 935466 100 -yr French Broad 935431 100 -yr French Broad 935409 100 -yr French Broad 935217 100 -yr French Broad 935216 100 -yr French Broad 935201 French Broad 935186 100 -yr French Broad 935185 100 -yr French Broad 935155 100 -yr French Broad 931751 100 -yr French Broad 925926 1 oo -yr French Broad 919776 100 -yr You created this PDF from an application that is not licensed to print to novaPDF printer (http: / /www.nova dp f.com) HEC -RAS Plan: Post -Prof River: French Broad Reach: French Broad Profile: FW Reach River Sta Profile Sta W.S. Lft Sta W.S. Rgt Q Total Min Ch El W.S. Elev Crit W.S. E.G. Elev E.G. Slope Vel Chnl Flow Area Top Width Froude # Chi (ft) (ft) (cfs) (ft) (ft) (ft) (ft) (ft/ft) (ft/s) (sq ft) (ft) French Broad 954729 FW 661.00 713.00 471.00 819.00 1352.00 1415.00 1415.00 Bridge 1416.00 1416.00 948.00 990.00 998.00 1006.00 1014.00 1016.00 Bridge 1016.50 1016.00 1016.00 180.00 180.00 202.00 1780.00 2612.00 1524.00 1370.00 2502.00 2529.00 2529.00 2529.00 2529.00 1633.00 1645.00 1655.00 1660.00 1736.00 1736.00 1736.00 1736.00 1735.00 1973.00 1973.00 1154.00 36004.00 36099.00 36374.00 36512.00 36512.00 36512.00 36512.00 36512.00 36512.00 36512.00 36512.00 36512.00 36512.00 36651.00 36651.00 36651.00 36651.00 36651.00 36968.00 36968.00 37140.001 2054.90 2055.201 2052.501 2050.401 2050.801 2052.001 2052.001 2052.001 2052.001 2049.001 2050.001 2050.001 2050.001 2050.101 2050.101 2050.101 2050.101 2050.101 2048.801 2046.501 2044.601 2083.00 2082.62 2081.78 2080.14 2078.91 2078.16 2078.06 2077.73 2077.75 2077.75 2077.68 2077.64 2077.63 2077.50 2076.58 2076.04 2076.37 2076.35 2075.25 2074.73 2073.80 2067.20 2067.75 2067.75 2067.20 2069.67 2070.17 2070.17 2069.80 2063.11 2083.20 2082.66 2081.89 2080.58 2079.03 2078.85 2078.82 2078.52 2078.48 2078.08 2078.02 2078.00 2077.98 2077.81 2077.60 2077.15 2076.81 2076.76 2075.32 2074.79 2073.98 0.000508 0.000094 0.000192 0.000735 0.000322 0.001377 0.003206 0.003414 0.001482 0.000673 0.000624 0.000531 0.000739 0.000828 0.002393 0.002658 0.001244 0.001084 0.000181 0.000108 0.000234 5.08 2.27 3.80 6.42 3.76 7.23 7.40 7.55 7.42 5.79 5.53 5.49 5.98 6.11 10.13 10.51 7.26 7.12 3.32 3.20 4.86 12337.33 26039.82 17180.28 8344.87 15170.01 6025.73 5582.77 5460.78 5870.26 9510.41 9352.33 9437.40 9301.52 9642.32 6610.31 6334.20 8826.59 9195.84 21950.62 25140.82 14939.171 1119.00 1899.00 1053.00 551.00 1150.00 374.00 362.00 361.00 373.00 685.00 655.00 657.00 654.00 722.00 510.00 509.50 720.00 719.00 1793.00 1793.00 952.00 0.17 0.08 0.13 0.23 0.14 0.28 0.30 0.31 0.29 0.20 0.19 0.20 0.21 0.22 0.36 0.38 0.26 0.26 0.12 0.12 0.161 French Broad 951720 FW French Broad 943272 FW French Broad 939048 FW French Broad 935788 FW French Broad 935768 FW French Broad 935763 FW French Broad 935748 French Broad 935733 FW French Broad 935728 FW French Broad 935553 FW French Broad 935466 FW French Broad 935431 FW French Broad 935409 FW French Broad 935217 FW French Broad 935216 FW French Broad 935201 French Broad 935186 FW French Broad 935185 FW French Broad 935155 FW French Broad 931751 FW French Broad 925926 FW French Broad 919776 FW You created this PDF from an application that is not licensed to print to novaPDF printer (http: / /www.nova dp f.com) Appendix E — Construction Plans PERMIT DRAWINGS NORTH CAROLINA WILDLIFE RESOURCES COMMISSION HENDERSON COUNTY PARKS &RECREATION DEPT. ETOWAH SMALL BOAT ACCESS FRENCH BROAD RIVER 13 MILES TO BREVARD DIRECTIONS TO SITE: 11 MILES TO NDERSONVILLE 1,0100 2,000 SCALE: 1 "= 2,000' 1. FROM ASHEVILLE, NC; FOLLOW 1 -26 EAST FOR 9 MILES. 2. TAKE EXIT 40 (NC -208 AIRPORT) WEST TOWARD BREVARD. FOLLOW FOR 4.7 MILES. 3. TURN LEFT ONTO HAYWOOD RD. (NC -191). FOLLOW FOR 0.4 MILES. 4. TURN RIGHT BANNER FARM RD. (SR- 1311). FOLLOW FOR 3.5 MILES. 5. TURN RIGHT ONTO BREVARD RD. (US -64). 6. IN 1.3 MILES. SITE WILL BE ON RIGHT SIDE BEFORE BRIDGE CROSSING FRENCH BROAD RIVER. LOOK FOR PULL -OFF AT PSNC VALVE STATION. SHEETINDEX COVER SITE MAP, SITE DIRECTIONS & INDEX SD -1.0 EXISTING SITE CONDITIONS & DEMOLITION PLAN SD -2.0 PROPOSED SITE PLAN SD -3.0 PROPOSED SITE GRADING PLAN SD -6.0 PROPOSED PROFILES r•�° -EW 811 . ®e8i1_arp� Know wdntl bellm 11 rU W% NOTE: IT IS THE CONTRACTOR'S (NCWRC) RESPONSIBILITY TO CALL 811 FOR UTILITY LOCATION SERVICES PRIOR TO START OF CONSTRUCTION. ALL UNDERGROUND UTILITY LINES SHALL BE LOCATED AND MARKED BEFORE BREAKING GROUND. ALL DEBRIS FROM CLEARING, EXCAVATION AND DEMOLITION SHALL BE LOADED AND HAULED OFF -SITE FOR DISPOSAL AT THE SWAIN COUNTY SANITARY LANDFILL. NO BURNING OR ON -SITE BURIAL OF WASTE SHALL BE PERMITTED. NOTE: ALL ELEVATIONS ARE IN NAVD88 US FEET TIED TO OPUS POINT ESTABLISHED ON SITE BY NCWRC ENGINEER ON MARCH 14, 2013. Z 0 NZ gw Ow UO W Z U Q rn O� Z N �Jd'Q W Z LL 0 z W J J Z W O U Q 3:wN0 �Z W O O w � Z J = U Z 2 W 0 N X ; r of z 0 0 N 21 � U Qj C c 3 r cXp 3 a LL 3 H Z O U Z O LU 0 U Z Z 2 I- W Q W W = m = fn 0 Q , w Z �O U O Q U Q> O 3: E Oo F_ W O (n 00 2 U Z W ry LL Date: 30- JUN -2015 File Name: EtowahSBA.dwg Surveyed: JCF, MRL, CSL Designed: JCF Drawn: JCF Approved: Sheet No. COVER PARCEL INFORMATION OPT i LISTED TO: HENDERSON COUNTY PARCEL NUMBER: 1017393 PIN: 9539430929 LOCATED PSNC NG LINE OHWM= 2063.0' MARKER ISTING BRIDGE PIER EXISTING BRIDGE ABUTMENT BREVARD (13 MILES) 50 0 50 100 Scale: 1" = 50' US HWY 64 0 a: c� z U EXISTING BILLBOARQ BREVARD ROAD z O N Z � gw O UO w W z U Q _ rn p Z Lu JN d Q Z LL W 0 z W J J z W f U Q �UU= °N o, z >H �co Q o o zC�of of r- C ai J Z W 6 O W Z O -0 ALL J= ��— QOQ(D of Uzi aj C� UNNAMED TRIBUTARY TO FRENCH BROAD RIVER F- y a r m 3 X of 0- W 3 O — z - Q V 2 � F J � o PROPOSED CLEARING LIMITS PROPERTY C' 0 _ f (1 ACRE) BOUND—AR—y-1 — — z o 2065 EXISTING PSNC NG VALVE PROPERTY BOUNDARY NOTE: IT IS THE CONTRACTOR'S (NCWRC) RESPONSIBILITY TO CALL 811 FOR UTILITY LOCATION SERVICES PRIOR TO START OF CONSTRUCTION. ALL UNDERGROUND UTILITY LINES SHALL BE LOCATED AND MARKED BEFORE BREAKING GROUND. GUA141 r ALL DEBRIS FROM CLEARING, EXCAVATION AND DEMOLITION SHALL BE LOADED AND HAULED OFF -SITE FOR DISPOSAL AT THE SWAIN COUNTY SANITARY LANDFILL. NO BURNING Kwwwhaysbelow. OR ON -SITE BURIAL OF WASTE SHALL BE PERMITTED. call belnre you df� OVERHEAD POWER LINE 2 HENDERSONVILLE (7 MILES) SITE TOPO SURVEYS PERFORMED BY JEFF FERGUSON, PE (ON 3 -14- 2013), AND CONTINUED BY MARK LEE, PLS (ON 9 -11- 2014). ELEVATIONS ARE NAVD88 US FEET. CONTOURS ARE 1 FOOT INTERVALS. 2070 Lv75 20a0 H Z OZ Z O O H 0� O LU W UZ 0 LLJ Q r C45 H Q Z 00 — W_ > J M Z 2 O Q U) or_ U 0E cn O Q Z 00 X 2 W U Z W LL Date: 30- JUN -2015 File Name: EtowahSBA.dwg Surveyed: JCF, MRL, CSL Designed: JCF Drawn: JCF Approved: Sheet No. SD -1.0 .'5:1_� VEGETATED BUFFER (REPLANT) P� 4F ° PARKING & MANEUVER * . AREA; COMPACTED ABC e e W STONE SURFACE e + W W CONCRETE VAN / + + , ` ACCESSIBLE / o0 PARKING PAD / e / OHWM= 2063.0' LOD OD LOD LOD LOD - LOD >1 b, PROPOSED STORMWATER DETENTION OHWM= 2063.0' . ° 15' V FLOATING DOCK; 8'W. x 80'L. ANCHORED TO CONCRETE ABUTMENT ® 1' ABOVE OHWM – REINFORCED CONCRETE LAUNCH RAMP; 14'W. x 94'L. ® 14% SLOPE, CAST IN PLACE ABOVE OHWM THEN PUSHED INTO POSITION ONCE CURED. TOP EL.= 2064.0', END EL= 2052.0'. CLASS -1 & CLASS –B RIPRAP FILL BELOW OHWM FOR RAMP BASE /---CUT BANKS ARMORED w/ CLASS –B RIPRAP RIPRAP OUTLET PROTECTION 40,0 LO — too X00 0 LOD r0T &' TOP EL.= ABUTMENT .�j �JJ `"``"`'' TOP EL.= 2064.0' G' 4 20 US HWY 64 BREVARD (13 MILES) z U 50 0 50 100 Scale: 1" = 50' P18" RCP LoD CULVERT PSNC \ too v PROPERTY BOUNDARY Lop LOD UNNAMED TRIBUTARY TO FRENCH BROAD RIVER PROPOSED LIMIT OF DISTURBANCE = 1.09AC. (47,353SF) BREVARD ROAD 2:1 FINISHED SLOPE ON COMPACTED FILL (SEED & MULCH) LOD GUARDRAIL \ C) 7.5% Z °6 O LOD '00 U) _ BOO w W OVERHEAD POWER LINE / �° — Q = 4 0 18 "0 RCP CULVERT 0 � Q C ASPHALT PAVED TURN –OUT / oU °o m O 0- J CIL LU PROPOSED ENTRANCE LOCATION: Q O N35.329641', W82.574011- 2 — Z O Nz g w OW UO W Z U Q rn 013 Z N �J O'Q LL Ca w Z Z J 0 Z >H �co Q o o Z U' J Z w 0 O W U) z CO O � LL J = 01 Q O Q v V Z C� W O O X a Lo 3 z 0 'A� HENDERSONVILLE (7 MILES) 07 W 07 ry Uj O� W O ry m 2 U Z W LL.. Date: 30- JUN -2015 File Name: EtowahSBA.dwg Surveyed: JCF, MRL, CSL Designed: JCF Drawn: JCF Approved: Sheet No. SD -2.0 I / i <oo 7 / CLASS -1 & CLASS -B RIPRAP FILL BELOW OHWM FOR RAMP BASE 2:1 CUT BANKS \� UNNAMED TRIBUTARY TO FRENCH BROAD RIVER N1 O 5+00 4 +75 \ LOD \ 50 to /O6 • / / Dc� / ,tL -'��06 3 50 LOD CLOD - _— PROPOSED LIMIT OF DISTURBANCE = 1.09AC. (47,353SF) /--2:1 FINISHED SLOPE ON COMPACTED FILL —(SEED & MULCH) — 2070 v / "� RCP L0 on �� _ -1 GUARDRAIL 2080 //JF�LVERT — � � �0 // 065 // /� %�� _ �� \��` o (6HWM�2 63.0' �" it 111 ��`` - -- -- ° Loo L LOD c Lo / LOD — 5&5= = oo �— EfiHE#b OWEf LI \ \' \\ \ = —_= — _ —�/i / �— — ��Ci�' \� _ -_ — =, —_\ \ 18 "0 RCP CULVERT N — /— - --_ — — ASPHALT PAVED TURN - OUT � S_ —� \ — 50 — 0 ry° of orO o Zp 2py" °o N N N US HWY 64 BREVARD ROAD PROPOSED ENTRANCE LOCATION: N35.329641', W82.574011- HENDERSONVILLE (7 MILES) _ = BREVARD (13 MILES) z C) U 50 0 50 100 Scale: 1" = 50' NOTE: ALL ELEVATIONS ARE IN NAVD88 US FEET TIED TO OPUS POINT ESTABLISHED ON SITE BY NCWRC ENGINEER ON MARCH 14, 2013. z O Nz g w 22 oW UO W z U Q rn 00 in Z N x < (if Uj LU LL U' Z J J Z W O )Q Of �wU= LOf O w U) z QOJ = QO U z W 0 N Xa : Of z D 0 N � o C° o � o -o � U C O X �' a LL o 3 F_ Z 0 Z 0 U) Cf) W 01� W W Z W_ H 0- Q �W CD 120 U) Z_ 0 _j CIL Q 2 CD Q W H 0� W 0 m 2 U Z W LL.. Date: 30- JUN -2015 File Name: EtowahSBA.dwg Surveyed: JCF, MRL, CSL Designed: JCF Drawn: JCF Approved: Sheet No. SD -3.0 2070 2065 2060 2055 2050 EXISTING EDGE OF PAVEMENT 0 US -64 2095 2095 lill illl III! Ilil lill illl 209 EXISTING GRADE 0 �� \ • � f 3090 2085 —11 "(A P/'P CVLVORT 2085 2080 PROPCSED GRA" EL ACCESS ROAD SURFACE= 2080 2075 2070 2065 2060 0+00 0+25 0+50 0+75 1+00 PROFILE - A: ACCESS ROAD ALIGNMENT Scale: H-1"=50' V- 1 " =10' CONCRETE APRON PROPOSED FLOATING DOCK ABUTMENT TOP EL.= 2064.0' — 2045 0+00 0+25 PROFILE - B: LAUNCH RAMP ALIGNMENT Scale: H-1"=10' V- 1 " =10' NOTE: ALL ELEVATIONS ARE IN NAVD88 US FEET TIED TO OPUS POINT ESTABLISHED ON SITE BY NCWRC ENGINEER ON MARCH 14, 2013. COMPACTED EARTH FILL 1+25 1+50 1+75 2+00 2+25 2+50 2+75 3+00 3+25 18"0 RCF' CULVERT 3+50 3+75 4+00 4+25 4+50 4+75 PROPOSED FLOATING DOCK (801. x 8'W.) — 2075 2070 2065 2060 5+00 2070 EXISTING GRADE 2065 II F- I I PROPOSED CONCRETE 2060 747* SLOPE LAUNUr1 rlivlr PUSH SLAB SECTION PROPOSED TOP OF BASE GRADE \ 2055 2050 CLASS —B RIPRAP & WASHED STONE FILL FOR BASE BELOW OHWM 2045 0+05 0 +75 1+00 1+25 OHWM NORMAL LOW WL (AS SURVEYED) CND OF RAMP Z O N Z g w Ow UO W Z U Q rn O� � Z N Lu J O Q UJ S uj LLOzO OZ —a,UQ L �wZ U= °N o) >H 1co Q o � o zw0 JO o -o LL J = rl� = QOQCO rn v UZ �; C� W O O X ~LL'> 6- LL 3 z 0 A& F— Z O U Z O U) Cf) W W U U z Q W H = Q CO W m J_ J � H O 2 U) off Uj Q �_ O0E H 0 W O 00 2 U Z W ly- ILL Date: 30- JUN -2015 File Name: EtowahSBA.dwg Surveyed: JCF, MRL, CSL Designed: JCF Drawn: JCF Approved: Sheet No. SD -6.0