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HomeMy WebLinkAbout20190210 Ver 1_Site 5 design information_A-0011C_Hyatt_Mill_Ck_Technical_Memo_02.01.19_20190214� IUIcCQRMICHG � TAYL4R TECHNICAL MEMORANDUM DATE: February 1, 2019 TO: Dave McHenry Division 14 DEO North Carolina Department of Transportation 253 Webster Road Sylva, NC 28779 FROM: Mike Miller McCormick Taylor, Inc. SUBJECT: A-0011 C Stream Relocation MT Project Number: 5961-02 Existing Conditions Assessment, Design, and H&H Analysis INTRODUCTION AND BACKGROUND INFORMATION This memo summarizes the existing conditions assessment and proposed relocation design along Hyatt Mill Creek for the North Carolina Department of Transportation (NCDOT), Division 14 A-0011 C project (NC 69 from GA State Line to US 64). Stream relocation is proposed along approximately 600 linear feet of Hyatt Mill Creek located adjacent to NC 69 and upstream of the confluence with Coleman Creek (Figure 1). This portion of Hyatt Mill Creek is proposed to be relocated due to fill associated with roadway widening along the southbound side of NC-69. Roadway widening is proposed along the southbound side of NC-69 to avoid historic property along the northbound side. Goals of the Hyatt Mill Creek relocation design include establishing appropriate channel dimension, plan, and profile following natural channel design methods and establishing 30-foot wide buffers along both stream banks in accordance with US Army Corps of Engineers (USACE), Wilmington District guidelines (USACE 2016). Two reference reaches were evaluated as part of the design process (Figure 2). The project reach is located in Clay County, NC within the Tusquitee Creek-Hiwassee River watershed (0602000202), which is a part of the Hiwassee River Basin (060200). Drainage area of the Hyatt Mill Creek project reach is approximately 0.35 square miles with dominant land use consisting of: • Paved; curbs and storm sewers — 1.8% • Commercial & business — 4.6% • Residential districts (1 acre) — 4.8% • Pasture, grassland or range — 43.0% • Woods - grass combination — 45.8% Reference Reach 1 is located along Right Prong Martin Creek in Cherokee County, NC and has a drainage area of approximately 0.31 square miles. Land use from StreamStats (National Land Cover Database [NLCD] 2011) indicates 100°/o forest cover (USGS 2016). Reference Reach 2 is located along Melhany Creek in Transylvania County, NC and has a drainage area of approximately 0.41 square miles. Land use from StreamStats (NLCD 2011) indicates 100% forest cover (USGS 2016). The main sections of this memo include geomorphic assessments (geomorphic variables and hydraulic variables), proposed channel design (proposed treatments, rock sizing and reforestation), and hydrologic and hydraulic analysis. Rosgen morphological variables are provided for the existing Hyatt Mill Creek project reach, reference reaches and proposed conditions as individual tables within the respective memo sections. A Rosgen morphological variables table with the existing, reference reach and proposed information combined in a single table is provided in the on-site mitigation plan set. - - � ' �" ,+- ' ., • , �:R _. . � ,A � ��TI�O� wk ;� ' �^! � L . ...e �"�_ ,♦ 'A F, � F � '�. � 4� i • , `h ♦� Madison � i '� � ��� v. � ? ' � , �� � � ,,� ;K , , . 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" � ., ..' . .i - : ..:_. . � �� �,: y r�,� Fs*'•� � e ,� '�''�� �'��� � ��' �� �,. �w� �� � � �� q��� ' .. . - - - l�, - .. - :. '"? :;a`� �?, .�,,, .?��, _ �1 ,jg /�'' # "�""\ c� �°'s z � 1 rr. a �{� ~� \ � �O � d1bfs i D�p �a.C� � z w � Z �O Q � � � � Q�O za— J � � Qzi � � � Q� U� 2 � � � � z z � a U � J W � � a ��.�./.� I..L � U 0 � Q County: CLEVELAND, CLAY, TRANSYLVAN IA Div: TIP# 14 A-0011 C WBS: Date: 1/23/2019 Figure 2 � McC4RM ICK � TAYLQR GEOMORPHIC ASSESSMENTS A-0011 C Stream Relocation Hyatt Mill Creek, Clay County, NC In June 2018 McCormick Taylor, Inc. performed detailed geomorphic assessments along the Hyatt Mill Creek project reach and two reference reaches. The detailed assessments involved measurements of channel geometry (plan, profile, and cross section), channel substrate (pebble counts), bank stability (bank height, bank slope, materials, vegetation), and riparian conditions. Geomorphic survey along the project and reference reaches were completed using the LaserMark LMH series rotary laser. The field measurements followed methods described in Stream Channel Reference Sites: An Illustrated Guide to Field Technique (Harrelson et al. 1994) and Stream Restoration, A Natural Channel Design Handbook (NCSU 2003). Items obtained during the detailed site assessment include: • Longitudinal profile survey (including bed surface, water surface, and geomorphic indicators) • Channel cross sections (geomorphic indicators, active channel, and break lines) • Pebble counts (150 particles) • Channel planform characteristics (radius of curvature, etc.)—supplemented by measurements performed on aerial photography and topographic survey • Photographs—photograph locations at pertinent features Following completion of field surveys, the data were evaluated using numerous Rosgen morphological variables and bankfull flow conditions were evaluated using The Reference Reach Spreadsheet v.4.3L (Mecklenburg 2006). See Tables 1 and 4 for the Rosgen morphological variables used to evaluate geomorphic conditions along the project reach and reference reaches. These results are summarized separately for the existing project reach and reference reaches in the sections below. Site mapping, including geomorphic features, riparian vegetation type and photo locations is in Appendix A. Photographs for the project site and the reference reaches are in Appendix B. Geomorphic assessment data, including cross sections, profiles and sediment data, are in Appendix C. Hyatt Mill Creek Geomorphic Variables The following geomorphic data was collected along Hyatt Mill Creek: • One (1) longitudinal profile (613 total ft) • Four (4) representative cross sections—one (1) riffle, two (2) runs and one (1) pool • Three (3) representative pebble counts (150 particles)—two (2) riffle and one (1) bar The existing Hyatt Mill Creek project reach begins at an existing 60" CMP and flows approximately 600 ft to the confluence with Coleman Creek. An existing 60" RCP is located at a driveway crossing near the middle of the existing project reach. Rosgen morphological variables used to evaluate geomorphic conditions along the existing project reach are in Table 1. Average channel slope along the existing Hyatt Mill Creek project reach is 1.7%. The channel has a mixture of bed morphology, including pool- riffle bed features and steep riffle/cascade bed features. The channel bed consists primarily of inedium and coarse gravel (Table 2). Maximum grain size along the bar feature is 67 mm. Existing bottom width ranges from 2.8 to 4.3 ft. Bank height, calculated from the maximum top of bank to the toe of slope, ranges from 2.0 to 3.1 ft. Bank material throughout the project reach was observed as primarily loam. Page 4 of 22 � nn�coRnn icK � TAYLQR A-0011 C Stream Relocation Hyatt Mill Creek, Clay County, NC Table 1. Rosgen Morphological Variables for Existing Hyatt Mill Creek Variables Min Mean Max Stream type C4 Drainage area (sq. mi.) 0.35 Bankfull width (ft) 8.6 8.7 8.8 Bankfull mean depth (ft) 0.8 1.0 1.2 Width-to-depth ratio 5.5 8.1 10.6 Bankfull cross-sectional area (sq ft) 7.3 8.0 8.6 Bankfull mean velocity (ft/s) 4.8 5.7 6.5 Bankfull discharge (cfs) 35.1 45.3 55.5 Bankfull max depth (ft) 1.3 1.5 1.7 Ratio of bankfull max depth of bankfull mean depth 1.4 1.5 1.6 Ratio of low bank height to max bankfull depth 0.6 0.8 1.0 Width of flood-prone area (ft) 22.7 27.7 32.7 Entrenchment ratio 2.6 3.7 4.8 Meander length (ft) 44 88 123 Ratio of ineander length to bankfull width 5.0 10.1 14.3 Radius of curvature (ft) 6 17 36 Ratio of radius of curvature to bankfull width 0.7 1.9 4.2 Belt width (ft) 15 20 24 Meander width ratio 1.7 2.3 2.8 Sinuosity 1.04 Valley slope (ft/ft) 0.020 Average slope (fUft) 0.017 Riffle slope (ft/ft) 0.019 0.042 0.069 Ratio of riffle slope to average slope 1.1 2.5 4.1 Pool slope (ft/ft) 0.000 0.008 0.031 Ratio of pool slope to average slope 0.0 0.5 1.8 Maximum pool depth (ft) -- 1.8 -- Ratio of pool depth to average bankfull depth 1.5 1.8 2.3 Pool width (ft) -- 6.5 -- Ratio of pool width to bankfull width 0.7 0.7 0.8 Pool area (sq ft) -- 8.0 -- Ratio of pool area to bankfull area 0.9 1.0 1.1 Pool to pool spacing (ft) 23.5 70.0 107.5 Ratio of pool to pool spacing to bankfull width 2.7 8.0 12.5 Page 5 of 22 � nnccvRnnic�c f TAYLUR A-0011 C Stream Relocation Hyatt Mill Creek, Clay County, NC Table 2. Grain Size for Hyatt Mill Creek Sample D16 D35 D50 D65 D84 D95 Percent Percent Percent mm mm mm mm mm mm Sand Gravel Cobble Pebble Count1 6 11 17 22 35 54 7 91 2 Riffle Pebble Count 2 5 16 20 25 35 60 14 82 4 Riffle Pebble Count 3 0.4 7 13 19 29 44 22 77 1 Bar The project reach is slightly entrenched (entrenchment ratio of 2.4 to 3.3), has a low width/depth ratio (5.5 to 10.6), and sinuosity of 1.04. Considering that width/depth ratios can vary by 2.0 units and sinuosity can vary by 0.2 units (NRCS 2007), the existing Hyatt Mill Creek project reach is classified as a C4 stream. Rosgen C-type channels are described as low-gradient, meandering alluvial channels with point bars, riffle-pool morphology, and broad, well-defined floodplains (NRCS 2007). Hydraulic Variables Bankfull discharges were calculated for each cross section within the existing Hyatt Mill Creek project reach. Hydraulic variables for the bankfull condition discharges can be found in Table 3. Table 3. Hyatt Mill Creek Existing Hydraulic Characteristics at Bankfull Discharges o n � n � y N � � a� � � � � � � �n y° � " v� Q- `D -� c. cn N c � �m m3 o e� � 01 � fD ' Q 0 'a 3 S n �� a z � M� (� � � a1 � ^� lD •'► <p � �'* � � y �D � � � �D o N C1 .-. � � � `< � �D �. i,� Z * G. 7 A v ...�3 � rt � �� � rt � �'' �D � �� f�lJ � 3 •.'�� � S v � y � � N 01 �G � � (r ffle) 35.1 1.4 7.3 8.8 1.3 0.8 10.6 4.8 0.59 0.68 0.96 �52� 0.031 * (pool) 46.2 1.4 8.0 6.5 1.8 1.2 5.2 5.8 0.66 0.85 1.03 �66� 0.030 ** (run) 2$•3 1.6 6.4 9.1 1.3 0.7 12.9 4.4 0.58 0.65 0.97 �50� 0.032 (r n) 55.5 1.6 8.6 6.9 1.7 1.2 5.5 6.5 0.73 1.05 1.12 �82� 0.030 * Due to XS-2 being a pool, it is likely unrepresentative of actual bankfull flow conditions for the existing Hyatt Mill Creek reach but is still provided for information purposes. ** XS-3 is located approximately 30ft downstream of the existing 60" RCP culvert and is likely unrepresentative of actual bankfull flow conditions for the existing Hyatt Mill Creek reach. *** Threshold grain size estimated based on Shields relationship as calculated in Mecklenburg (2006) (first number) and Leopold et al. (1964) as described in Rosgen (2007) (number in parentheses) Page 6 of 22 � McC4RM ICK � TAYLQR The existing conditions hydraulic variables analysis for Hyatt Mill since they are the most representative of bankfull flow conditions provided in Table 3 for information purposes only since they ar bankfull conditions due to XS-2 being a pool and XS-3 being in cl existing 60" RCP, which disrupts natural flow conditions. A-0011 C Stream Relocation Hyatt Mill Creek, Clay County, NC Creek focuses on XS-1 and XS-4 . Results for XS-2 and XS-3 are e unlikely to be representative of ose proximity (downstream) of the Results in Table 3 indicate that bankfull discharge along the existing Hyatt Mill Creek project reach ranges from 35 to 55 cfs. The range of values for velocity (4.8 to 6.5 ft/s), shear stress (0.68 to 1.05 Ib/ftz), and threshold grain size (52 to 82 mm based on the Leopold et al. [1964] relationship) are due to differences in bankfull depth (and associated discharge) identified in the field for each cross section. Considering the maximum grain size along a bar feature observed in the field was 67 mm, threshold grain size of 52 mm indicates that a bankfull discharge of 35 cfs has a slight tendency for sediment deposition; however, only minor deposition was observed along the existing Hyatt Mill Creek project reach and the observed deposition was in the vicinity of instream obstructions. In addition, threshold grain size of 82 mm indicates that a bankfull discharge of 55 cfs has a tendency for bed erosion/degradation; however, the channel bed at XS-4 was comprised of larger, cobble-sized material and did not exhibit signs of erosion. Based on these results, it appears that a bankfull threshold grain size of 52 mm is adequate to transport the upstream sediment supply and cobble-sized material can stabilize the channel bed under conditions with bankfull threshold grain size of 82 mm. Reference Reach 1 Geomorphic Variables The following geomorphic data was collected along Reference Reach 1: • One (1) longitudinal profile (190 total ft) • Two (2) representative cross sections—one (1) riffle and one (1) pool • Three (3) representative pebble counts (150 particles)—two (2) riffles and one (1) bar Rosgen morphological variables used to evaluate geomorphic conditions along Reference Reach 1 are in Table 4. Average channel slope along Reference Reach 1 is 2.2%. The channel has a mixture of bed morphology, including pool-riffle and plane-bed features. The channel bed consists primarily of medium gravel to medium cobble (Table 5). Maximum grain size along the bar feature is 115 mm. Existing bottom width ranges from 6.0 to 6.5 ft. Bank height, calculated from the maximum top of bank to the toe of slope, ranges from 1.3 to 3.4 ft. Bank material throughout the project reach was observed as primarily loam. The project reach is slightly entrenched (entrenchment ratio of 2.4), has a low width/depth ratio (10.7), and sinuosity of 1.21. Considering that width/depth ratios can vary by 2.0 units (NRCS 2007), Reference Reach 1 is classified as a C4b stream. Rosgen C-type channels are described as low- gradient, meandering alluvial channels with point bars, riffle-pool morphology, and broad, well-defined floodplains (NRCS 2007); however, with a 2.2% slope, Reference Reach 1 is a steeper C type channel. Page 7 of 22 f nn�coRnn icK � TAYLQR A-0011 C Stream Relocation Hyatt Mill Creek, Clay County, NC Table 4. Rosgen Morphological Variables for Reference Reaches Variables Reference Reach 1 Reference Reach 2 Min Mean Max Min Mean Max Stream type C4b C4 Drainage area (sq. mi.) 0.31 0.41 Bankfull width (ft) -- 9.9 -- -- 9.6 -- Bankfull mean depth (ft) -- 0.9 -- -- 0.7 -- Width-to-depth ratio -- 10.7 -- -- 13.0 -- Bankfull cross-sectional area (sq ft) -- 9.1 -- -- 7.0 -- Bankfull mean velocity (ft/s) -- 4.9 -- -- 3.9 -- Bankfull discharge (cfs) -- 44.9 -- -- 27.3 -- Bankfull max depth (ft) -- 1.2 -- -- 1.0 -- Ratio of bankfull max depth of bankfull __ 1.3 -- -- 1.4 -- mean depth Ratio of low bank height to max bankfull __ 1.0 -- -- 1.0 -- depth Width of flood-prone area (ft) -- 23.8 -- -- 31.1 -- Entrenchment ratio -- 2.4 -- -- 3.3 -- Meander length (ft) -- 93 -- 37 48 55 Ratio of ineander len th to bankfull width -- 9.4 -- 3.9 5.0 5.7 Radius of curvature (ft) 19 22 25 17 21 28 Ratio of radius of curvature to bankfull 1.9 2.2 2.5 1.7 2.2 2.9 width Belt width (ft) 27 36 44 23 26 31 Meander width ratio 2.8 3.6 4.4 2.4 2.7 3.2 Sinuosity 1.21 1.22 Valley slope (ft/ft) 0.026 0.014 Average slope (ft/ft) 0.022 0.011 Riffle slope (fUft) 0.005 0.051 0.088 0.012 0.049 0.112 Ratio of riffle slope to average slope 0.2 2.3 4.0 1.1 4.5 10.2 Pool slope (ft/ft) 0.004 0.005 0.005 0.002 0.004 0.006 Ratio of pool slope to average slope 0.2 0.2 0.2 0.1 0.3 0.5 Maximum pool depth (ft) -- 1.3 -- -- 1.1 -- Ratio of pool depth to average bankfull __ 1.4 -- -- 1.6 -- depth Pool width (ft) -- 9.8 -- -- 6.6 -- Ratio of pool width to bankfull width -- 1.0 -- -- 0.7 -- Pool area (sq ft) -- 8.7 -- -- 4.8 -- Ratio of pool area to bankfull area -- 1.0 -- -- 0.7 -- Pool to pool spacing (ft) -- 54.0 -- 9.5 22.2 37.0 Ratio of pool to pool spacing to bankfull __ 5.5 -- 1.0 2.3 3.9 width Page 8 of 22 � nnccvRnnic�c f TAYLUR A-0011 C Stream Relocation Hyatt Mill Creek, Clay County, NC Table 5. Grain Size for Reference Reach 1 Sample D16 D35 D50 D65 D84 D95 Percent Percent Percent mm mm mm mm mm mm Sand Gravel Cobble Pebble Count1* 6 12 19 31 74 140 3 79 18 Riffle Pebble Count 2 5 13 23 43 84 120 8 68 24 Riffle Pebble Count 3 7 13 17 22 29 44 10 88 2 Bar "Pebble Count 1 includes less than 1% boulder Hvdraulic Variables Bankfull discharges were calculated for each cross section along Reference Reach 1. Hydraulic variables for the bankfull condition discharges can be found in Table 6. Table 6. Reference Reach 1 Existing Hydraulic Characteristics at Bankfull Discharges � '� � n < � N o � C� � y t�ir � x 0 0� � � � ,-. � = y O Z � p � ul <D 3 � � � p) Q- fn C p� � '� � (� � � � 3 S � ` y � � N' Q fC � �C � �D S -a S � � � y � � f/) Z <D � �D fD o V1 ,C�y, � '� .-• � �D N � _ � � � n o� •� O � 3 rt�p '.��► C� n �' �D � 'i�i y � ._. 3 v �. 3 3 v � N � � f/1 .... C� � � 7 (riffle) 44.9 2.3 9.1 9.9 1.2 0.9 10.7 4.9 0.79 1.22 0.95 �96� 0.041 * (pool) 38.9 2.1 8.7 9.8 1.3 0.9 11.1 4.5 0.73 1.02 0.89 �80� 0.041 �Due to XS-2 being a pool, it is likely unrepresentative of actual bankfull flow conditions for Reference Reach 1 but is still provided for information purposes. ** Threshold grain size estimated based on Shields relationship as calculated in Mecklenburg (2006) (first number) and Leopold et al. (1964) as described in Rosgen (2007) (number in parentheses) The existing conditions hydraulic variables analysis along Reference Reach 1 focuses on XS-1 since it is the most representative of bankfull flow conditions. Results for XS-2 are provided in Table 6 for information purposes only since it is unlikely to be representative of bankfull conditions due to XS-2 being a pool. Results in Table 6 indicate that bankfull discharge along Reference Reach 1 is approximately 45 cfs. Velocity (4.9 ft/s) is within the range of values observed at the existing Hyatt Mill Creek project reach. Values for shear stress (1.22 Ib/ftz) and threshold grain size (96 mm based on the Leopold et al. [1964] relationship) are higher than the values observed along the existing Hyatt Mill Creek project reach due to higher slope along Reference Reach 1. Considering the maximum grain size along a bar feature observed along Reference Reach 1 was 115 mm, threshold grain size of 96 mm indicates that a bankfull discharge of 45 cfs has a slight tendency for sediment deposition; however, only minor to moderate deposition was observed along Reference Reach 1. Deposition observed along Reference Reach 1 appears to be in the range of typical C4 streams and the deposition is in the form of point bars, rather than mid-channel bars, indicating the sediment is sorted in a balanced way. These results indicate that a threshold grain size slightly less than the maximum grain size along a bar feature results balanced sediment sorting in the form of point bars along Reference Reach 1. Page 9 of 22 � McCQRM ICK � TAYLQR Reference Reach 2 Geomorphic Variables A-0011 C Stream Relocation Hyatt Mill Creek, Clay County, NC The following geomorphic data was collected along Reference Reach 2: • One (1) longitudinal profile (221 total ft) • Three (3) representative cross sections—two (2) riffles and one (1) pool • Three (3) representative pebble counts (150 particles)—two (2) riffles and one (1) bar Average channel slope along Reference Reach 2 is 1.1%. The channel has a mixture of bed morphology, including pool-riffle and plane-bed features. The channel bed consists primarily of medium gravel to medium cobble (Table 7). Maximum grain size along the bar feature is 32 mm. Existing bottom width ranges from 4.5 to 6.8 ft. Bank height, calculated from the maximum top of bank to the toe of slope, ranges from 0.7 to 1.9 ft. Bank material throughout the project reach was observed as primarily loam/silt loam. The project reach is slightly entrenched (entrenchment ratio of 3.3), has a low width/depth ratio (13.0), and sinuosity of 1.22. Reference Reach 2 is classified as a C4 stream based on these values. Rosgen C-type channels are described as low-gradient, meandering alluvial channels with point bars, riffle-pool morphology, and broad, well-defined floodplains (NRCS 2007). Table 7. Grain Size for Reference Reach 2 Sample D16 D35 D50 D65 D84 D95 Percent Percent Percent mm mm mm mm mm mm Sand Gravel Cobble Pebble Count 1* 5 9 13 18 29 42 9 91 < 1% Riffle Pebble Count 2 8 13 16 21 31 50 4 95 < 1% (Riffle) Pebble Count 3 5 11 14 17 21 28 9 91 0 (Bar) Hydraulic Variables Bankfull discharges were calculated for each cross section along Reference Reach 2. Hydraulic variables for the bankfull condition discharges can be found in Table 8. The existing conditions hydraulic variables analysis along Reference Reach 2 focuses on XS-1 since it appears to be the most representative of bankfull flow conditions. Results for XS-2 and XS-3 are provided in Table 8 for information purposes only since they are unlikely to be representative of bankfull conditions due to XS-2 being a pool and XS-3 having a low bankfull discharge and cross- section dimensions. Results in Table 8 indicate that bankfull discharge along Reference Reach 2 is approximately 27 cfs. Values for velocity (3.9 ft/s), shear stress (0.46 Ib/ft2), and threshold grain size (35 mm based on the Leopold et al. [1964] relationship) for Reference Reach 2 XS-1 are lower than what was observed along the existing Hyatt Mill Creek project reach due to lower slope and slightly lower depth observed along Reference Reach 2. Considering the maximum grain size along a bar feature observed along Reference Reach 2 was 32 mm, threshold grain size of 35 mm indicates that bankfull discharge of 27 cfs results in an approximate balance of sediment transport conditions. Page 10 of 22 � McCQRM ICK � TAYLQR A-0011 C Stream Relocation Hyatt Mill Creek, Clay County, NC Table 8. Reference Reach 2 Existing Hydraulic Characteristics at Bankfull Discharges � � � � � � � �' � cn O y � � �p � � O � o � c� y � � x v � Q � -- �, � �, Z � o � v, � 3 ,� ° � a, Q- cn c � � -a � N Q � 'a 3 S rt ` � � � N' 0 (G � � � � � 'a � � � �G � � � in Z <D 3 �p fD o y n .� fD N z � *� 7 � � � � � rt � � rt � v � � � N Nv 3 .�.rt�. � fl1 � � ;�.F' N � � y .i � � � � 7 (riffle) 2�.3 1.1 7.0 9.6 1.0 0.7 13.0 3.9 0.49 0.46 0.83 �35� 0.031 * (pool) 18.9 1.1 4.8 6.6 1.1 0.7 9.0 3.9 0.48 0.44 0.85 �33� 0.030 (riffl ) 16.7 1.2 4.4 6.7 0.9 0.7 10.2 3.8 0.48 0.46 0.85 �35� 0.031 "�Due to XS-2 being a pool, it is likely unrepresentative of actual bankfull flow conditions for Reference Reach 2 but is still provided for information purposes. ** Threshold grain size estimated based on Shields relationship as calculated in Mecklenburg (2006) (first number) and Leopold et al. (1964) as described in Rosgen (2007) (number in parentheses) PROPOSED DESIGN The proposed design includes a mixture of channel relocation, bed stabilization, and bank grading and stabilization along approximately 633 ft of Hyatt Mill Creek. Proposed work begins at a 60" CMP and continues approximately 633 ft to the confluence with Coleman Creek. The existing driveway currently located approximately 350 ft downstream of the start of proposed work, is proposed to be relocated approximately 50 ft downstream from the currently location. The proposed driveway will have a 95" x 67" steel pipe arch culvert compared to the existing 60" RCP. The proposed reach is designed to be slightly entrenched (entrenchment ratio of 3.0 to 4.5), have low width/depth ratio (11.6), sinuosity of 1.08, and average slope of 1.6°/o. Considering that width/depth ratios can vary by 2.0 units and sinuosity can vary by 0.2 units (NRCS 2007), the proposed channel is classified as a C4 stream. The site was designed to be mostly within range of the Rosgen morphologic variables of the two reference reaches. Refer to Table 9 for the geomorphic variables of the proposed design compared to the reference reaches. The Rosgen morphologic variables outside the range of the reference reaches include width of flood- prone area, radius of curvature, ratio of radius of curvature to bankfull width, belt width, meander width ratio, maximum pool depth, ratio of pool depth to average bankfull depth, pool width, ratio of pool width to bankfull width, pool area, and ratio of pool area to bankfull area. The range of proposed width of flood-prone area overlaps the reference reach values with the largest proposed value 14.3 ft (46%) higher than the highest value observed at the reference reaches. The higher width of flood-prone area is considered a benefit and not problematic. Radius of curvature and the ratio of radius of curvature to bankfull width have values slightly higher than the reference reaches due to two curves with radii of 40 ft immediately upstream and downstream of the proposed arch pipe. The slightly higher radius of curvature values at the proposed arch pipe are intended to provide hydraulically smooth transitions into and out of the proposed pipe. The remaining curves range from 20 to 30 ft, with the single 30 ft radius only 2 ft higher than the largest measured reference reach radius. The ratio of radius of curvature to bankfull width for the curves with radii ranging from 20 to 30 ft have only a single ratio that is 0.2 units higher than the highest ratio observed along the reference reaches. Page 11 of 22 f nn�coRnn icK � TAYLQR A-0011 C Stream Relocation Hyatt Mill Creek, Clay County, NC Table 9. Site Design Rosgen Morphological Variables for Hyatt Mill Creek Site Design Reference Reach 1 Reference Reach 2 Variables Min Mean Max Min Mean Max Min Mean Max Stream t pe C4 C4b C4 Draina e area sq. mi. 0.35 0.31 0.41 Bankfull width (ft) -- 10.0 -- -- 9.9 -- -- 9.6 -- Bankfull mean depth (ft) -- 0.9 -- -- 0.9 -- -- 0.7 -- Width-to-depth ratio -- 11.6 -- -- 10.7 -- -- 13.0 -- Bankfull cross-sectional area _ $ 6 -- -- 9.1 -- -- 7.0 sq ft Bankfull mean velocity (ft/s) -- 4.7 -- -- 4.9 -- -- 3.9 -- Bankfull discharge (cfs) -- 40.6 -- -- 44.9 -- -- 27.3 -- Bankfull max depth (ft) -- 1.2 -- -- 1.2 -- -- 1.0 -- Ratio of bankfull max depth of 1.4 -- 1.3 -- -- 1.4 -- bankfull mean depth Ratio of low bank height to 1.0 -- 1.0 -- -- 1.0 -- max bankfull depth Width of flood-prone area ft 30.4 37.4 45.4 -- 23.8 -- -- 31.1 -- Entrenchment ratio 3.0 3.7 4.5 -- 2.4 -- -- 3.3 -- Meander len th ft 68 81 89 -- 93 -- 37 48 55 Ratio of ineander length to 6.8 8.1 8.9 -- 9.4 -- 3.9 5.0 5.7 bankfull width Radius of curvature (ft) 20 28 40 19 22 25 17 21 28 Ratio of radius of curvature to 2 0 2.8 4.0 1.9 2.2 2.5 1.7 2.2 2.9 bankfull width Belt width (ft) 19 26 32 27 36 44 23 26 31 Meander width ratio 1.9 2.6 3.2 2.8 3.6 4.4 2.4 2.7 3.2 Sinuosit 1.08 1.21 1.22 Valle slope ft/ft 0.017 0.026 0.014 Avera e slope ft/ft 0.016 0.022 0.011 Riffle slope ft/ft 0.026 0.030 0.035 0.005 0.051 0.088 0.012 0.049 0.112 Ratio of riffle slope to average 1.6 1.9 2.2 0.2 2.3 4.0 1.1 4.5 10.2 slope Pool slope ft/ft 0.000 0.004 0.006 0.004 0.005 0.005 0.002 0.004 0.006 Ratio of pool slope to average 0.0 0.3 0.4 0.2 0.2 0.2 0.1 0.3 0.5 slope Maximum pool depth (ft) -- 2.2 -- -- 1.3 -- -- 1.1 -- Ratio of pool depth to average _ 2.6 -- -- 1.4 -- -- 1.6 bankfull depth Pool width (ft) -- 11.0 -- -- 9.8 -- -- 6.6 -- Ratio of pool width to bankfull 1.1 -- -- 1.0 -- -- 0.7 width Pool area (sq ft) -- 13.6 -- -- 8.7 -- -- 4.8 -- Ratio of pool area to bankfull 1.6 -- -- 1.0 -- -- 0.7 area Pool to pool spacing (ft) 37.0 43.2 50.5 -- 54.0 -- 9.5 22.2 37.0 Ratio of pool to pool spacing to 3.7 4.3 5.1 -- 5.5 -- 1.0 2.3 3.9 bankfull width " I here is a 1 UU tt radius curve where the proposed alignment transitions into the existing alignment at the upstream limits. I his curve isn't included in the table since it skewed the Meander Length, Radius of Curvature, and Belt Width results based on the majority of the proposed curves. Page 12 of 22 � McC4RM ICK � TAYLQR A-0011 C Stream Relocation Hyatt Mill Creek, Clay County, NC While most of the proposed belt width and meander width ratios are within the range of reference reach values, some values are outside (lower) than the reference reach values due to variability in the proposed alignment and site conditions (upstream tie-in point, proposed pipe arch location and confluence with Coleman Creek). Considering that values outside the reference reach range are 4 ft lower (belt width) and 0.5 units lower (meander width ratio) and that most values and ratios are within range of the reference reaches, any belt width values and meander width ratios slightly outside of the reference reach range are not considered problematic. Maximum pool depth, ratio of pool depth to average bankfull depth, pool width, ratio of pool width to bankfull width, pool area, and ratio of pool area to bankfull area have larger values under proposed compared to the reference reaches due to the method used to design the proposed pool geometry. Maximum pool depth is proposed to be 1 ft deeper than proposed riffle depth, which results in higher pool-depth-related variables compared to the reference reaches. Pool width is proposed to be 10% wider than the bankfull riffle width, which results in higher pool-width-related variables compared to the reference reaches. Proposed pool-area-related variables are higher due to the proposed pool depth and width combination. The proposed pool geometry is intended to provide a hydraulically smooth transition along the bend and provide adequate flow capacity to allow the inside of the pool to adjust by storing sediment and minimize potential for erosion along the outside bank. Proposed conditions bankfull discharge is approximately 41 cfs and the associated threshold grain size is 63 mm based on the Leopold et al. (1964) relationship (Rosgen 2007) and shear stress is 0.82 Ib/ft2. This threshold grain size is only slightly lower than the maximum grain size along a bar feature observed in the field (67 mm), which indicates that the proposed channel is in balance with transporting the upstream sediment supply. Proposed Channel Features The following features are proposed along the project reach to provide bed and bank stabilization and habitat improvements along the project reach: • Riffle Grade Control • Wood Drop Riffle • Toe Boulder Protection • Rock Cross Vane Structure Riffle Grade Control and Wood Drop Riffle Structures Eight riffle grade control structures and six wood drop riffle structures are proposed. These structures are designed to provide grade control and habitat along the cross-over (riffle) areas along the proposed alignment and immediately downstream of culverts along the proposed channel. Local slopes for riffle grade control and wood drop riffle structures range from 2.6 to 3.5%. Both structures are proposed to have the same bed material (Riffle Stone Mix) that is sized to remain stable under large flow events (typically 10-year recurrence interval) as defined below in the stone sizing discussion. This bed material provides a base of gravel/cobble habitat with interstitial spaces and flow path diversity. Channel bed material will be worked into the void space to provide habitat consistent with natural riffles. The addition of wood in the wood drop riffles provides an additional habitat type, flow diversity, increased denitrification potential, and concentrated baseflow. Proposed riffle stone mix includes a mixture of 70% Class 2, 15% Class 1, and 15% Class B. See Stone Sizing below for more information about the stone sizing method. Page 13 of 22 � McG4RM ICK A-0011 C Stream Relocation � TAYLQR Hyatt Mill Creek, Clay County, NC Toe Boulder Protection Toe boulder protection is proposed in areas of anticipated high shear stress and/or velocity and where the proposed alignment results in tight and/or long bend geometry. The toe boulder protection is sized to consist of Class 2 riprap to protect against anticipated erosive forces along protected channel banks. Rock Cross Vane Structure A rock cross vane is proposed along Coleman Creek upstream of the confluence with the Hyatt Mill Creek project reach. The cross vane is intended to provide grade control along Coleman Creek and protect streambanks by decreasing shear stress and velocity by diverting the energy to the center of the channel as it approaches the Coleman Creek culvert extension. Design of the cross vane followed methods in Rosgen (2006). Proposed vane rock dimensions are 1.5 ft x 2.5 ft x 3.5 ft. See Stone Sizing below for more information about the vane rock sizing method. Stone Sizinq Stone sizing calculations are provided below for the riffle grade control and wood drop riffles along the proposed Hyatt Mill Creek project reach and the rock cross vane along Coleman Creek. Stone Size for Riffle Grade Control and Wood Drop Riffle Sizing the sediment mixture along the riffle grade control and wood drop riffle structures begins with identifying the material size that is at the threshold of motion under the design shear stress using the modified Andrews (1994) equation to calculate dimensionless critical shear stress (i�;*) and the Shields relationship to calculate the threshold grain size. The Andrews equation (Andrews and Nankervis, 1995) is an empirical equation that determines the particle size ratio (estimating a mixed bed) capable of resisting an applied force above the threshold for motion, while the Shields equation (Shields, 1936) is a dimensionless ratio which defines the threshold for motion per particle size: Andrews Equation: z�� = 0.0375 ( d` �-o.s�z dso Shields Equation: i�� = i���Ys — YW� * d� (1) (2) where i�;* is the critical dimensionless shear stress of the d; fraction, i�; is shear stress (Ib/ft2) of the design flow, d; is the sediment size being assessed, dso is the median sediment size, ys is the bulk weight of sediment (165 Ib/ft3), and yW is the density of water (62.4 Ib/ft3). Calculations of the above equations are carried out so that the d3o grain size of the proposed sediment mixture is immobile. Therefore, d; in the above equations is substituted with d3o. In addition, it is assumed that d3o = 0.57dso. Substituting these assumed values into equation (1) gives: i* 0.0375 * �o.s�dso� -o.a�a �3� cd30 — dso which yields: z�d3o = 0.061 (4) Therefore, the dimensionless critical shear stress (i�;*) used in equation (2) is 0.061. Rearranging to solve for d3o (ft) yields: d30 = 0.159z�d3o (6) Page 14 of 22 � McG4RM ICK A-0011 C Stream Relocation � TAYLQR Hyatt Mill Creek, Clay County, NC The largest shear stress calculated at the 10-year recurrence interval discharge is 3.35 Ib/ft2. This value is multiplied by a safety factor of 1.35 (USACE 1994) to account for the difference in average versus maximum shear stress, resulting in a maximum shear stress of 4.52 Ibs/ftz. Using this value as z�a3o produces a stable D3o of 8.6 inches. The approximate D5o size is calculated by dividing the D3o grain size by 0.57. This gives an approximate D5o grain size of 15.1 inches. The proposed rock mix that matches the calculated grain sizes consists of 70% Class 2, 15% Class 1, and 15% Class B. Placement depth of the channel bed material is 30 inches minimum. Stone Size for Rock Cross Vane The rock cross vane stone sizing calculations completed below apply to the rock cross vane structure proposed on Coleman Creek. Cross vane structures are often isolated in flow and are subject to the highest stresses in the channel as well as being struck from mobilized stone and debris. Therefore, the vane rock sizing procedure recommended by Rosgen (2006) is utilized: Rock Size = 0.1724Ln(Bankfull_Shear_Stress) + 0.6349 where stone size is in meters and bankfull shear stress is in kg/m2. Bankfull shear stress estimated for Coleman Creek is 1.22 Ibs/ft2 (5.96 kg/m2). This produces a stone size of approximately 3.1 ft (0.94 m) in diameter. Based on profession judgment, the proposed dimensions for the crest stone are 1.5 ft x 2.5 ft x 3.5 ft. Reforestation/Landscaping Proposed planting along the Hyatt Mill Creek stream relocation project consists of Type 1 Streambank Reforestation (Live Stakes), Type 2 Streambank Reforestation (Trees and Shrubs), Type 2 Streambank Reforestation (Embankment Shrubs), and native grass seed mixture. Shrubs will be planted along the roadway embankment to extend the buffer zone on the eastern size of the proposed channel. The proposed plantings were chosen based on their native and wetland indicator status. Proposed species are listed in Table 10. See Table 11 for the native grass seed mix species from the NCDOT standard specification. Live stakes (Type I) will be planted at 2-ft on center spacing, trees and shrubs (Type II) will be planted at 6 ft 10 ft (average of 8 ft) on-center spacing. See Table 11 for the native grass seed mix rates of application. Page 15 of 22 � nnccaRnnicK f TAYLUR A-0011 C Stream Relocation Hyatt Mill Creek, Clay County, NC Table 10. Proposed Trees, Shrubs, and Live Stakes Botanical Name Common Name Wetland Indicator Status* Live Stakes Salix nigra Black Willow FACW Cornus amomum Silk Do wood OBL Trees and Shrubs Pinus virginiana Vir inia Pine UPL Robinia pseudoacacia Black Locust FACU Platanus occidentalis S camore FACW Acer rubrum Red Ma le FAC Cornus amomum Silk Do wood FACW Viburnum dentatum S icebush FAC Lindera benzoin Southern Arrowwood FAC Corylus americana American Hazlenut FACU Embankment Shrubs Cornus racemosa Gra Do wood FAC Hamamelis vir iniana American Witchhazel FACU Viburnum dentatum Southern Arrowwood FAC Sambucus racemosa Red Elderberr FACU �UPL — Upland; FACU — Facultative upland; FAC — Facultative; FACW — Facultative Upland; OBL — Obligate Wetland Table 11. Proposed Native Grass Seed Mixture Rate of Application Species Ibs/acre Au ust 1— June 1* 18 Cree in Red Fescue 8 Bi Bluestem 6 Indian rass 4 Switch rass 35 R e Grain Ma 1 — September 1* 18 Cree in Red Fescue 8 Bi Bluestem 6 Indian rass 4 Switch rass 25 German or Brownto Millet *During periods of overlapping dates, the kind of seed to be used shall be determined. Page 16 of 22 � McC4RM ICK � TAYLQR HYDROLOGIC AND HYDRAULIC ANALYSIS Hydrolo_qic Methodolo_py A-0011 C Stream Relocation Hyatt Mill Creek, Clay County, NC Hydrologic analysis was completed to determine the discharge rates for Hyatt Mill Creek at the confluence of Coleman Creek. StreamStats, Version 4.2.1, was used to delineate the drainage area to the study point. The drainage area of 0.35 square miles (224 acres) was verified using available GIS topographic information. Peak discharge estimates were calculated along Hyatt Mill Creek for the bankfull-, 2-, 10-, 25-, 50-, and 100-year design storms. There were no gages present within the vicinity of the study area and the study reach is located upstream of the detailed FEMA study on Coleman Creek (FIRM # 3700545900J). Recurrence interval discharges for existing and proposed conditions were calculated at the downstream limits of the project reach using WinTR-55 (Natural Resource Conservation Service). NOAA rainfall depths for Clay Valley County were applied to determine the resultant discharges (Appendix D). StreamStats discharges were calculated but not used for this study since the size of the drainage area was 224 acres. The limitations for these regression equations are limited to drainage areas greater than 1 square mile. Soils information for the project was obtained from StreamStats which had determined that SSURGO hydrologic soil type B is found within the watershed. The runoff curve number (RCN) was calculated in accordance with SCS TR-55. Hydrologic parameters such as land use, soil type, and slope were used to determine the existing average RCN for the study area. The RCN for the stream's existing drainage area is 62 for the design conditions. See Appendix D for RCN computations. Time of concentration is the time required for runoff to travel from the hydraulically most distant part of the drainage area to a point of investigation in the watershed. TR-55 methodology was used to compute time of concentration from flow path hydraulics. A maximum of 100' of overland flow was considered for this study. The land slope was calculated based on GIS topography. The Tc path follows overland and shallow concentrated flow before reaching the concentrated flow path within the channel. The time of concentration for Drainage Area is 0.51 hours. See Appendix D for time of concentration computations. Hydrologic modeling was used to generate recurrence interval discharges for the Hyatt Mill project site based on existing conditions. USDA Soil Conservation Service (SCS) Win TR-55 computer program was used to determine runoff from the surrounding watershed area. A single drainage area was used to represent flow to the confluence with Coleman Creek. Peak discharges were calculated for the 1-, 2-, 10-, 25-, 50- and 100-year recurrence intervals and will be utilized for the hydraulic analysis. Based on the proposed drainage area and ultimate land use, TR-55 discharges were developed and shown in Table 12 below. Table 12. Hvdroloaic Discharaes Reach 2-Year 10-Year Hyatt Mill 91.27 234.47 FLOWS (ft3/s) 25-Year 50-Year 100-Year Bankfull 336.96 423.99 517.93 39 Page 17 of 22 � McC4RM ICK � TAYLQR Hydraulic Methodolo_qv A-0011 C Stream Relocation Hyatt Mill Creek, Clay County, NC Hydraulic analysis was performed using the Army Corp of Engineers HEC-RAS (Hydrologic Engineering Center River Analysis System) computer program, Version 5.0.5. HEC-RAS is designed to compute one- dimensional flow profiles in natural and constructed stream channels by applying the energy equation between cross sections. Models for existing and proposed conditions were generated for this phase of the study. Data used to develop the model include cross sections, Manning's "n" values, loss coefficients and boundary conditions. To account for varying channel characteristics, stream geometry, and changes in bed slope, the hydraulic model was evaluated as a"Mixed" flow regime. Peak discharges were utilized following the previously described hydrologic analysis. Due to the short reach length, flows were only introduced at the upstream end of the channel in the HEC-RAS model, as shown in Table 12. Cross Section Data HEC-RAS cross sections were generated within MicroStation using a Digital Terrain Model (DTM) from a topographical field survey of the stream. Proposed channel grading and the proposed roadway fill slope were merged with the existing DTM to create the proposed conditions cross sections. Following development of the cross sections within MicroStation, georeferenced HEC-RAS input files were created using InRoads and imported into the HEC-RAS model geometry. Cross sections were established at general intervals of every 20 linear feet over a total length of approximately 600 ft. The existing conditions model contains 23 cross sections and the proposed model contains 38 cross sections; 21 of the existing cross sections were also utilized in the proposed model. Interpolated cross sections were utilized in both existing and proposed conditions as needed to smooth profiles. Boundary Conditions Boundary conditions are required for HEC-RAS to establish starting water surface elevations at the ends of a study reach and to execute the flow profile computations. Since the model was executed with a Mixed Flow Regime, boundary conditions need to be established at both the downstream and upstream extents of the study reach. The upstream boundary condition for the Hyatt Mill reach was set to critical depth. The downstream boundary was set to normal depth and based on the channel slope at the downstream end of the reach, which was 2.5% for the existing conditions model and 0.9% for the proposed model. Manninp's `N' Values The Manning's roughness coefficient, `n', is an estimate of the resistance to flow in a given channel. Factors which may affect the roughness include bed material, vegetation, channel irregularities, obstructions and channel alignment. The Manning's `n' values were assigned based on field investigations and aerial mapping along with tables provided in Chow's "Open Channel Hydraulics" Manual. In both existing and proposed conditions, the Manning's `n' value in the channel was set to 0.035. Overbank conditions primarily consist of shrub and tall grasses, with areas of woods. The Manning's `n' value in the overbanks ranged from 0.065 to 0.1. sion and Contraction Coefficients HEC-RAS computes energy losses due to the changes in flow area by multiplying the changes in the velocity head with the corresponding expansion and contraction coefficient. The default values of 0.1 and 0.3 for the expansion and contraction coefficients, respectively, were used through the model. Higher values of 0.3 and 0.5 were used at sections surrounding the driveway culvert where more abrupt transitions within the cross section occur. Page 18 of 22 � McG4RM ICK � TAYLQR Existing Structures A-0011 C Stream Relocation Hyatt Mill Creek, Clay County, NC Included in the study reach is one (1) structure which is a driveway culvert providing access from NC 69 to a private property. In existing conditions, the culvert is a 60" RCP structure with no headwalls. In proposed conditions, the culvert is relocated approximately 110 linear feet downstream and a 95" x 77" arch pipe is proposed. The proposed culvert is to be buried 1' per the 2016 NCDOT Guidelines for Drainage Studies and Hydraulic Design manual and no increases in the 100-year WSEL over 1' occur as a result. Existing input parameters including size, span, lengths, and pertinent invert elevations were determined from survey and field data. HEC-RAS Results The Hyatt Mill channel velocities within the existing conditions range from 1.85 to 9.26 ft/s for the 2-year storm and 3.54 to 10.74 ft/s for the 10-year event. The shear stresses range from 0.08 Ib/ftz to 2.89 Ib/ftZ for the 2-year storm and 0.20 Ib/ft2 to 2.99 Ib/ftz for the 10-year storm. The highest velocity and shear stress for the 2-year event occur at River Station 21 which is located at the bottom of a steep slope (approximately 10%). The abrupt channel invert transition also causes a high velocity and shear stress at this location during the 10-year event; however, the highest velocity and shear stress for the 10-year event occur at River Station 1. This River Station is the downstream limit of the existing conditions model where the channel is narrower and the channel slope and subsequent boundary condition of 2.5% result in higher velocities and shear stresses. The Hyatt Mill channel velocities within the proposed conditions range from 3.36 to 8.36 ft/s for the 2-year storm and 3.54 to 10.74 ft/s for the 10-year event. The shear stresses range from 0.32 Ib/ft2 to 2.41 Ib/ft2 for the 2-year storm and 0.29 Ib/ft2 to 3.34 Ib/ft2 for the 10-year storm. The highest velocities and shear stresses for both the 2- and 10-year events occur at River Station 18.1, which is the end of a riffle structure on an approximately 3.2% slope. A hydraulic jump occurs at this location during these events as the riffle transitions into a pool. Proposed channel structures are designed for the proposed shear stresses and velocities. The 2- and 10-year channel velocities and shear stresses along with the 100-year water surface elevation (WSEL) changes from existing to proposed conditions are evaluated at comparable cross sections (Tables 13 through 15). Although the channel is nearly entirely relocated within the modeled reach, 21 cross sections were utilized in both existing and proposed conditions and are compared. Although there are some increases in velocity and shear stress, the proposed values for these parameters are managed by the design of channel grading and in-stream structures. A decrease in the 100-year WSEL is observed at 13 of the comparable cross sections, with decreases over 1' at 5 of those cross sections. Increases in the 100-year WSEL occur at 8 of the comparable cross sections, with a maximum increase of 0.95' at River Station 6. The increase in WSEL at this location is a result of the shifted driveway culvert. In existing conditions, this cross section is located in an area of supercritical flow downstream of the existing driveway; in proposed conditions it is located upstream of the proposed driveway culvert where backwater occurs. Page 19 of 22 � nnccaRnnic�c f TAYLUR A-0011 C Stream Relocation Hyatt Mill Creek, Clay County, NC Table 13. Velocity Comparison River 2-Year Velocit ft/s 10-Year Velocit ft/s Station Existin Pro osed Difference Existin Pro osed Difference 23 4.50 5.73 27% 6.57 7.76 18% 22 6.49 3.46 -47% 7.97 5.40 -32% 21 9.26 5.82 -37% 10.12 7.35 -27% 20 5.52 3.67 -34% 9.07 6.09 -33% 18 5.53 3.46 -37% 8.84 5.87 -34% 17 4.68 5.74 23% 8.76 7.16 -18% 16 5.76 3.59 -38% 7.00 6.06 -13% 15 3.88 5.42 40% 8.42 7.53 -11 % 14 4.00 3.62 -10% 6.28 5.65 -10% 13 4.98 5.26 6% 5.78 7.31 26% 12 3.40 3.55 4% 5.51 5.73 4% 11 2.90 5.36 85% 4.37 7.49 71 % 10 2.28 3.36 47% 2.93 5.50 88% 9 2.13 5.27 147% 3.00 7.39 146% 8 1.85 3.73 102% 3.02 5.57 84% 7 6.00 3.58 -40% 5.56 3.54 -36% 6 6.86 5.36 -22% 7.63 3.78 -50% 4 5.53 3.65 -34% 7.98 5.97 -25% 3 6.30 5.22 -17% 8.27 7.38 -11 % 2 8.59 4.32 -50% 8.55 6.58 -23% 1 8.79 3.88 -56% 10.57 6.09 -42% Table 14. Shear Stress Comparison River 2-Year Shear Stresses Ib/s 10-Year Shear Stresses Ib/s Station Existin Proposed Difference Existin Proposed Difference 23 0.61 1.02 67% 1.09 1.61 48% 22 1.39 0.33 -76% 1.69 0.71 -58% 21 2.89 1.06 -63% 2.97 1.41 -53% 20 0.99 0.37 -63% 2.44 0.92 -62% 18 1.02 0.33 -68% 2.29 0.88 -62% 17 0.69 1.04 51 % 2.21 1.40 -37% 16 1.12 0.36 -68% 1.39 0.93 -33% 15 0.45 0.91 102% 2.00 1.54 -23% 14 0.50 0.37 -26% 1.12 0.82 -27% 13 0.83 0.87 5% 0.96 1.49 55% 12 0.32 0.35 9% 0.77 0.83 8% 11 0.22 0.90 309% 0.47 1.54 228% 10 0.14 0.32 129% 0.21 0.77 267% 9 0.11 0.88 700% 0.21 1.52 624% 8 0.08 0.40 400% 0.20 0.79 295% 7 1.21 0.37 -69% 0.80 0.29 -64% 6 1.60 0.92 -43% 1.53 0.33 -78% 4 1.01 0.38 -62% 1.76 0.92 -48% 3 1.35 0.86 -36% 1.90 1.52 -20% 2 2.45 0.55 -78% 1.84 1.16 -37% 1 2.61 0.44 -83% 2.99 0.98 -67% Page 20 of 22 � McCQRM ICK A-0011 C Stream Relocation � TAYLQR Hyatt Mill Creek, Clay County, NC Table 15. 100-Year Water Surface Elevation Comparison River Existing Proposed Difference Station (ft) 23 1939.02 1938.10 -0.92 22 1937.88 1938.08 0.20 21 1937 .43 1937 .81 0. 38 20 1936.58 1937.13 0.55 18 1935.75 1935.98 0.23 17 1935.59 1935.96 0.37 16 1935.36 1935.30 -0.06 15 1935.04 1935.12 0.08 14 1935.24 1934.33 -0.91 13 1935.24 1933.90 -1.34 12 1934.53 1933.75 -0.78 11 1934.64 1933.45 -1.19 10 1934.72 1933.29 -1.43 9 1934.70 1932.90 -1.80 8 1934.60 1932.85 -1.75 7 1932.18 1932.71 0.53 6 1931.78 1932.73 0.95 4 1929.86 1929.08 -0.78 3 1929.53 1928.89 -0.64 2 1929.19 1928.39 -0.80 Page 21 of 22 � McG4RM ICK A-0011 C Stream Relocation � TAYLQR Hyatt Mill Creek, Clay County, NC REFERENCES Andrews, E.D. 1994. Marginal bed load transport in a gravel bed stream, Sagehen Creek, California. Water Resources Research v. 30, no. 7, p. 2241-2250. Andrews, E.D. and J.M. Nankervis. 1995. Effective Discharge and the design of channel maintenance flows for gravel-bed rivers. Natural and anthropegenic influences in f/uvial geomorphology, AGU Monograph Series No. 89, Washington, D.C., 151-164. Harrelson, Cheryl C; Rawlins, C. L.; Potyondy, John P. 1994. Stream Channel Reference Sites: An Illustrated Guide to Field Technique. Gen. Tech. Rep. RM-245. Fort Collins, CO: U.S. Department of Agriculture, Forest Service, Rocky Mountain Forest and Range Experiment Station. 61 p. Leopold L.B., Wolman M.G., and J.P. Miller. 1964. Fluvial Processes in Geomorphology, Dover Publications. New York, New York. Mecklenburg, Dan and Ohio Department of Natural Resources. 2006. The Reference Reach Spreadsheet, version 4.3L NCSU (NC State University). Stream Restoration, A Natural Channel Design Handbook; B.A. Doll, G. L. Grabow, K.R. Hall, J. Halley, W. A. Harman, G.D. Jennings, D.E. Wise (authors); N.C. State University, N.C. Stream Restoration Institute and North Carolina Sea Grant (EPA 319 Grant Program); Raleigh, NC; 2003. NRCS (Natural Resource Conservation Service). 2007. Technical Supplement 3E: Rosgen Stream Classification Technique—Supplemental Materials. In J. Bernard, J.F. Fripp, & K.R. Robinson (Eds.), Part 654 Stream Restoration Design National Engineering Handbook (210-VI-NEH, pp. 11-1-11-76). Washington, DC: USDA Natural Resources Conservation Service. Rosgen, D.L. 2006. Cross-vane, W-Weir, and J-hook Vane Structures: Description, Design, and Application for Stream Stabilization and River Restoration. Wildland Hydrology. Rosgen, D.L. 2007. Chapter 11: Rosgen Geomorphic Channel Design. In J. Bernard, J.F. Fripp, & K.R. Robinson (Eds.), Part 654 Stream Restoration Design National Engineering Handbook (210-VI-NEH, pp. 11-1-11-76). Washington, DC: USDA Natural Resources Conservation Service. Shields, A. 1936. Application of Simi/arity Princip/es and Turbulence Research to Bed-Load Movement. Mitteilungen der Preussischen Versuchsanstalt fur Wasserbau und Schiffbau, Berlin. In: Ott, W.P. and van Uchelen, J.C. (translators), California lnst. Tech., W.M. Keck Lab of Hydraulics and Water Resources, Rept. No. 167. USACE (United States Army Corps of Engineers). 1994. Hydraulic Design of Flood Control Channels. EM-1110-2-1601, Department of the Army, Washington, DC. USACE (United States Army Corps of Engineers). 2016. Wilmington District Stream and Wetland Compensatory Mitigation Update. Wilmington District, Wilmington, NC. USGS (U.S. Geological Survey). 2016. The StreamStats program. Accessed online at https://streamstats.usqs.qov/ss/ for the state of North Carolina, accessed on June 27, 2018. 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Y��:G �' L��:.., 1 Y` 1+ r � ����} � ������ �.. . 5�" 'k �� t -c� o � I #� � .,k���`��`��~ s• �d a � � y`�} � y�. •�� � lr* xY'^ 'V ��,' _ � ����'- � �� "�"„� _,; �r�� �4 '=�� rx^'� �c"� . ,& ��_ y' �_ 1 ,.- _� .., . � .. ��''�� � , !' ��� � �- " .. . . f a�'„ �' -.�':.+°?- . ��+� , ' � �_�� a � ,--�. �.t �r ���+. . . + ,�-�.. rY 'Y• +y Y . �,� .. �C`r�'�„„ �� -'-���'- � '�i�„ �''"�' ,, �.' � _- . ��" ".�r ��' e - �� �� � ��� ��C"r_tt � -. � � .'y `. � � . . .�ti Y � i ' � O � . � � �� �: y=:'������ ������� A-OO11C Stream Relocation Design Appendix B: Photographs Reference Reach 2 Representative Photographs A-OO11C Stream Relocation Design Appendix B: Photographs Reference Reach 2 Representative Photographs APPENDIX C : CROSS SECTIONS, LONGITUDINAL PROFILES, AND SEDIMENT DATA APPENDIX C-1: CROSS SECTIONS Appendix C-1: Cross Sections A-OO11C Stream Relocation Design Hyatt Mill Creek Cross Section 1 1+ 93 NC-69 Stream Relocation, Riftle 92 91.5 91 0 90.5 � � 90 w 89.5 89 88.5 0 5 10 Bankfull Dimensions 7.3 x-section area (ft.sq.) 8.8 � width (ft) 0.8 � mean depth (ft) 1.3 � max depth (ft) 9.4 � wetted parimeter (ft) 0.8 � hyd radi (ft) 10.6 � width-depth ratio Bankfull Flow 4.8 �lacity (ft/s) 35.1 � discharge rate (cfs) 0.96 � Froude number 186 -150.9 , — --t--- 15 20 25 Width Flood Dimensions 22.7 W flood prone area (ft) 2.6 � entrenchment ratio --- � low bank height (ft) --- � low bank height ratio Flow Resistance 0.031 Manning's roughness 0.12 � D'Arcy-Weisbach fric. --- � resistance factor u/u` --- � relati�2 roughness 30 35 40 45 Materials --- D50 (mm) --- D84 (mm) 33 �threshold grain size (mm): Forces & Power 1.4 channel slope (%) 0.68 �shearstress (Ib/sq.ft.) 0.59 �shear�locity (ft/s) 3.5 � unit strm power (Ib/ft/s) Distance� BS � HI � FS � Elevation Omit Notes Cross Section P.iffle � reference ID instrument heighf longitudinal station 0 Bankfull Sta e FS _ --- elevation � � --- Low Bank Height FS' --- elevation Flood Prone Area width fpa ChannelSlope percent slope Flow Resistance Manning's "n" D'Arcy - Weisbach "f' Note: --�—�0— --�—�0— --�—�0^— --�—�7J— --�— '��— --�—�0— --�—�0— --�—�0— --�—��— --�—� 0— --�—� �— --�—� 0— --�— '� 0— --�—��— --�—�0— --�—�0— -----0— -----�— -----�— -----0— -----�— ����� ■0- -----�— -----0— -----0— -----0— -----0— -----�— 91 90.5 . I I I— , I 90 � 89.5 0 � S9 � w 58.5 88 — 87.5 87 0 5 10 Bankfull Dimensions 8.0 x-section area (ft.sq.) 6.5 � width (ft) 1.2 � mean depth (ft) 1.8 � max depth (ft) 8.2 � wetted parimeter (ft) 1.0 � hyd radi (ft) 5.2 � width-depth ratio Bankfull Flow 5.8 velocity (ft/s) 46.2 � discharge rate (cfs) 1.03 � Froude number 186 -139.8 15 20 25 W idth Flood Dimensions 87.0 W flood prone area (ft) 13.5 �entrenchment ratio -- � low bank height (ft) -- � low bank height ratio Flow Resistance 0.030 Manning's roughness 0.11 � D'Arcy-Weisbach fric. -- � resistance factor u/u` -- � relati� roughness 30 35 40 45 Materials --- D50 (mm) --- D84 (mm) 42 � threshold grain size (mm): Forces & Power 1.4 channel slope ( % ) 0.85 �shearstress(Ib/sq.ft.) 0.66 �shear�elocity (ft/s) 6.3 � unit strm power (Ib/ft/s) 50 Distance� BS � HI � FS � Elevation Omit Notes Cross Section Paal � reference ID instrument height longitudinal station J Bankfull Sta e FS elevation Low Bank Hei ht FS --- elevation Flood Prone Area width Tpa ChannelSlope percent slope Flow Resistance Manning's "n" D'Arcy - Weisbach "f' Note: 9 Appendix C-1: Cross Sections A-OO11C Stream Relocation Design Hyatt Mill Creek Cross Section 2 2+ g2 NC-69 Stream Relocation, Pool _—�—�0 _—�—�� --�—� 0 --�—� 0 --�— �� 0 --�— �� 0 --��� 0 --��5.8�� 0 --�—� 0 --�—� 0 �����n ����� ■0 --�—� 0 --�—�� --�—�0 ���� '� ■0 ���� • � � ■0 ����� ■0 ����� ■0 ���� '� ■0 -----0 ����� ■0 ����� ■0 ����� ■0 -----0 -----� ----- 0 -----0 Appendix C-1: Cross Sections A-OO11C Stream Relocation Design Hvatt Mill Creek Cross Section 3 89 88.5 88 87.5 C O � 87 N W 86.5 86 85.5 85 0 Bankfull Dimensions 6.4 x-section area (ft.sq.) 9.1 �width (ft) 0.7 � mean depth (ft) 1.3 � max depth (ft) 9.8 �wetted parimeter (ft) 0.7 � hyd radi (ft) 12.9 �width-depth ratio Bankfull Flow 4.4 �elocity (ft/s) 28.3 �discharge rate (cfs) 0.97 � Froude number 141.6 -113.3 Cross Section Run � reference ID� instrument height 1 longitudinal station S Bankfull Sta e FS _ elevation Low Bank Hei ht FS --- elevation Flood Prone Area width ipa � Channel Slope percent slope � 9 Flow Resistance Manning's "n" D'Arcy - Weisbach "f' Note: 4+ 17 NC-69 Stream Relocation, Run Flood Dimensions 32.7 W flood prone area (ft) 3.6 � entrenchment ratio -- � low bank height (ft) -- � low bank height ratio Flow Resistance 0.032 Manning's roughness 0.14 � D'Arcy-Weisbach fric. -- � resistance factor u/u* -- � relati� roughness Materials --- D50 (mm) --- D84 (mm) 32 �threshold grain size (mm): Forces & Power 1.6 channel slope ( % ) 0.65 � shear stress (Ib/sq.ft.) 0.58 �shearvelocity(ft/s) 3.1 � unit strm power (Ib/ft/s) Distance� BS ! HI � FS � Elevation Omit Notes (ft) (ft) ft (ft) ft Bkf 92.01 88.05 ❑ 92.01 87.96 ❑ 92.01 87.64 ❑ 92.01 86.595 ❑ 92.01 85.9 ❑ 92.01 85.6 ❑ 92.01 85.64 ❑ 92.01 85.69 ❑ 92.01 86.53 ❑ 92.01 86.89 ❑ 92.01 57.51 ❑ 92.01 88.63 ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ 5 10 15 20 25 30 W idth Appendix C-1: Cross Sections A-OO11C Stream Relocation Design Hvatt Mill Creek Cross Section 4 87 86.5 86 85.5 c ° 85 � a'� 84.5 w 84 � 83.5 — 83 82.5 0 5 Bankfull Dimensions 8.6 x-section area (ft.sq.) 6.9 �width (ft) 1.2 � mean depth (ft) 1.7 � max depth (ft) 8.2 � wetted parimeter (ft) 1.0 � hyd radi (ft) 5.5 � width-depth ratio Bankfull Flow 6.5 �locity (ft/s) 55.5 �discharge rate (cfs) 1.12 � Froude number 186 -130.5 Cross Section Run � reference ID� instrument height longitudinal station Bankfull Stage FS elevation Low Bank Hei ht FS --- elevation Flood Prone Area width fpa Channel Slope percent slope �• Flow Resistance Manning's "n" D'Arcy - Weisbach "f' Note: 5+ 56 NC-69 Stream Relocation, Run 10 15 Width Flood Dimensions 32.8 W flood prone area (ft) 4.8 �entrenchment ratio --- � low bank height (ft) --- � low bank height ratio Flow Resistance 0.030 Manning's roughness 0.10 � D'Arcy-Weisbach fric. --- � resistance factor u/u* --- � relatiue roughness 20 25 30 Materials --- D50 (mm) --- D84 (mm) 51 �threshold grain size (mm): Forces & Power 1.6 channel slope (%) 1.05 �shearstress(Ib/sq.ft.) 0.73 �shear�,elocity(ft/s) 8 � unit strm power (Ib/ft/s) Distance' BS � HI � FS � Elevation Omit Notes -- '�—�0 -- ��—�0 -- '�—�0 --�—�0 -- '�—�0 -- '�—�0 -- '�—�0 -- '�—�0 -- '�_�0 -- '�—�0 --�—�0 -----0 -----0 -----0 -----0 -----0 -----0 -----0 -----0 -----0 -----0 -----0 -----0 -----0 -----0 -----0 -----0 -----0 Appendix C-1: Cross Sections A-OO11C Stream Relocation Design Reference Reach 1 Cross Section 1 94.5 94 93.5 0 93 � � 92.5 w 92 91.5 91 0 Bankfull Dimensions 9.1 x-section area (ft.sq.) 9.9 width (ft) 0.9 mean depth (ft) 1.2 max depth (ft) 10.7 wetted parimeter (ft) 0.9 hyd radi (ft) 10.7 width-depth ratio Bankfull Flow a.9 �elocity (ft/s) 44.9 discharge rate (cfs) 0.95 Froude number 186 -141.1 0+ 44 NC-69 Stream Relocation, Riffle Flood Dimensions 23.8 W flood prone area (ft) 2.4 entrenchment ratio --- low bank height (ft) --- low bank height ratio Flow Resistance 0.041 Manning's roughness 0.21 D'Arcy-Weisbach fric. --- resistance factor u/u` --- relati� roughness Cross Section Riffle � reference ID� instrument height longitudinal station Bankfull Sta e FS = 92.85 elev elevation --- Low Bank Height FS --- elevation Flood Prone Area width fpa 23.8 ChannelSlo e percent slope Flow Resistance Manning's "n" D'Arcy - Weisbach "P' Note: Materials --- D50 (mm) --- D84 (mm) 60 threshold grain size (mm): Forces & Power 2.3 channel slope ( % ) 1.22 shear stress (Ib/sq.ft.) 0.79 shear �locity (ft/s) 6.5 � unit strrn power (Ib/ft/s) Distance BS HI FS Elevation Omit Notes ����� --�-�0- --�-�-0- --�-� 0- --�-��- --�-�0- --�-�0- --�-�0- --�-�0- --�-��- --�_� 0- --�-� 0- --�-� �- --�-��- --�-��- --�-� �- ----- 0- ----- 0- -----�- -----0- -----0- -----�- ----- ■0- ----- 0- ----- 0- -----�- -----0- -----0- -----�- 5 10 15 20 25 30 Width Appendix C-1: Cross Sections A-OO11C Stream Relocation Design Reference Reach 1 Cross Section 2 93.5 93 92.5 � 92 0 � 91.5 � w 91 90.5 90 - 89.5 0 5 Bankfull Dimensions 8.7 x-section area (ft.sq.) 9.8 width (ft) 0.9 mean depth (ft) 1.3 max depth (ft) 11.2 wetted parimeter (ft) 0.8 hyd radi (ft) 11.1 width-depth ratio Bankfull Flow 4.5 velocity (ft/s) 38.9 discharge rate (cfs) 0.89 Froude number 186 -147.1 10 15 W idth Flood Dimensions 83.0 W flood prone area (ft) 8.4 entrenchment ratio -- low bank height (ft) -- low bank height ratio Flow Resistance 0.041 Manning's roughness 0.21 D'Arcy-Weisbach fric. -- resistance factor u/u` -- relati� roughness Cross Section Paal � reference ID instrument height longitudinal station Bankfull Sta e FS = 91.26 ele elevation --- Low Bank Height FS --- elevation Flood Prone Area width Tpa ChannelSlope percent slope Flow Resistance Manning's "n" D'Arcy - Weisbach "f' Note: 1+ 5 NC-69 Stream Relocation, Pool 1.94 1.92 1.35 0.9 20 25 30 Materials --- D50 (mm) --- D84 (mm) 50 threshold grain size (mm): Forces & Power 2.1 channel slope ( % ) 1.02 shear stress (Ib/sq.ft.) 0.73 shear �elocity (ft/s) 5.2 � unit strm power (Ib/ft/s) Distance BS HI FS Elevation Omit Notes _-�-�0� _-�-�'u ����� ■0 --�-� 0 ����� ■0 --��� 0 --�� 6.17 � '� ■0 --�� 7.07 ��. ■0 --�i ` 7.02 � '�i ■Q --�� '� ■0 --�- '�� ����� ■0 --�-� 0 --�-�� --�-�0 ����� ■0 ����� ■0 ����� ■� ����� ■0 ����� ■0 -----0 ����� ■0 ����� ■0 ����� ■0 -----0 -----� ----- 0^ -----I� 96.5 96 i c 95.5 0 .� > W 95 94.5 94 Appendix C-1: Cross Sections A-OO11C Stream Relocation Design Reference Reach 2 Cross Section 1 0+ 36 NC-69 Stream Relocation, Riffle 0 5 Bankfull Dimensions 7.0 x-section area (ft.sq.) 9.6 width (ft) 0.7 mean depth (ft) 1.0 max depth (ft) 10.4 wetted parimeter (ft) 0.7 hyd radi (ft) 13.0 width-depth ratio Bankfull Flow 3.9 �locity (ft/s) 27.3 discharge rate (cfs) 0.83 Fraude number 186 -158.7 10 15 20 Width Flood Dimensions 31.1 W flood prone area (ft) 3.3 entrenchment ratio -- low bank height (ft) -- low bank height ratio Flow Resistance 0.031 Manning's roughness 0.13 D'Arcy-Weisbach fric. -- resistance factor u/u' --- relati� roughness 25 30 Materials -- D50 (mm) -- D84 (mm) 23 threshold grain size (mm): Forces & Power 1.1 channel slope (% ) 0.46 shear stress (Ib/sq.ft.) 0.49 shear �locity (ft/s) 1.96 � unit strm power (Ib/ft/s) 35 Distance BS HI FS Elevation Omit Notes Cross Section F,iffle � reference ID� instrument height longitudinal station Bankfull Sta e FS = 95.14 elev elevation --- Low Bank Hei ht FS --- elevation Flood Prone Area width fpa ChannelSlope percent slope Flow Resistance Manning's "n" D'Arcy - Weisbach "F' Note: -- � � -�0- -- � � -�0- -- � � -�0- -- � � -�0- -- � � -�0- -- � � -�0- -- � � -�0- -- � � -�0- -- � � -�0- -- � � -�0- �� �� �� ■0- -- � � -�0- -- � � -�0- -- � � -�0- -- � � -�0- -- � � -�0- -----0- -----0- ---_-0- -----0- -----0- ����� ■0- -----0- -----0- -----0- -----0- -----0- -----0- 96 95.5 95 0 94.5 � �' 94 w 93.5 I - 93 92.5 0 2 4 Bankfull Dimensions 4.8 x-section area (ft.sq.) 6.6 width (ft) 0.7 mean depth (ft) 1.1 max depth (ft) 7.5 wetted parimeter (ft) 0.648 hyd radi (ft) 9.0 width-depth ratio Bankfull Flow 3.9 velocity (ft/s) 18.9 discharge rate (cfs) 0.85 Froude number 186 -167.1 6 8 10 W idth Flood Dimensions 110.0 W flood prone area (ft) 16.6 entrenchment ratio --- low bank height (ft) --- low bank height ratio Flow Resistance 0.030 Manning's roughness 0.12 D'Arcy-Weisbach fric. --- resistance factor u/u` --- relati�a roughness 12 14 16 18 20 Materials --- D50 (mm) --- D84 (mm) 22 threshold grain size (mm): Forces & Power 1.1 channel slope ( % ) 0.44 shear stress (Ib/sq.ft.) 0.48 shear eelocity (ft/s) 1.96 � unit strm power (Ib/ft/s) Distance BS HI FS Elevation Omit Notes Cross Section Paal � reference ID� instrument height longitudinal station 0 Bankfull Stage FS elevation Low Bank Height FS --- eleuation Flood Prone Area width fpa ChannelSlope percent slope Flow Resistance Manning's "n" D'Arcy - Weisbach "P' Note: tt�9 � Appendix C-1: Cross Sections A-OO11C Stream Relocation Design Reference Reach 2 Cross Section 2 0+ g7 NC-69 Stream Relocation, Pool (ft) (ft) (ft) (ft) (ft) Bkf 98.16 94.76 ❑ 98.16 94.87 ❑ 98.16 94.05 . ❑ 98.16 93.09 ❑ 98.16 93.17 ❑ 98.16 93.29 ❑ 98.16 93.77 ❑ 98.16 94.22 ❑ 98.16 94.37 ❑ 98.16 94.42 ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ Appendix C-1: Cross Sections A-OO11C Stream Relocation Design Reference Reach 2 Cross Section 3 95.5 95 � 94.5 0 � w 94 93.5 93 0 1+ 15 NC-69 Stream Relocation, Riflle 5 10 15 20 25 30 35 Bankfull Dimensions 4.4 x-section area (ft.sq.) 6.7 width (ft) 0.7 mean depth (ft) 0.9 max depth (ft) 7.3 wetted parimeter (ft) 0.6 hyd radi (ft) 10.2 width-depth ratio Bankfull Flow 3.8 �elocity (ft/s) 16.7 discharge rate (cfs) 0.85 Froude number 141.6 -124.9 Width Flood Dimensions 110.0 W flood prone area (ft) 16.4 entrenchment ratio --- low bank height (ft) --- low bank height ratio Flow Resistance 0.031 Manning's roughness 0.13 D'Arcy-Weisbach fric. --- resistance factor u/u' --- relati� roughness Materials --- D50 (mm) --- D84 (mm) 22 threshold grain size (mm): Forces & Power 1.2 channel slope ( % ) 0.46 shear stress (Ib/sq.ft.) 0.48 shear �locity (ft/s) 1.86 � unit strm power (Ib/ft/s) Distance BS HI FS Elevation Omit Notes Cross Section Fifflz � reference ID instrument height longitudinal station Bankfull Sta e FS = 94.03 elev elevation --- Low Bank Height FS --- elevation Flood Prone Area width fpa � Channel Slope percent slope Flow Resistance Manning's "n" D'Arcy - Weisbach "f' Note: --�-�0- --�-��- --�-�0- --�-�0- --�-�0- --�-�0- --�-�0- --�-�0- --�_�0- --�-�0- --�-�0- --�-�0- _-�-�0- --�-�0- --�-�0- --�-�0- --�-�0- -----0- -----0- -----0- -----0- -----0- -----0- -----0- -----0- -----0- -----0- -----0- APPENDIX C-2 LONGITUDINAL PROFILE Appendix C-2: Longitudinal Profile A-OO11C Stream Relocation Design Hyatt Mill Creek Profile NG-59 5tream Relocation 96 94 92 � 9a � .� $8 � � w $� 8� $2 80 tbed water srt = x-section o riffle crest o paol ❑ run glide x L8 + RB - bankfull ____�� � � , �. � 193.D 282.D 418.5 556.0 T 100 20� 300 400 54D 6(iQ 7�0 Channel Qistance tftj Appendix C-2: Longitudinal Profile A-OO11C Stream Relocation Design Reference Reach 1 Profile NC-69 Stream Relocation 97 96 95 94 � 93 � o g2 .� � 91 w 90 89 88 87 �bed water srf o x-section o riffle crest o pool � run glide x LB + RB - bankfull 0 20 40 60 80 100 120 140 160 180 200 Channel Distance (ft) � � � � 44.0 105.0 Appendix C-2: Longitudinal Profile A-OO11C Stream Relocation Design Reference Reach 2 Profile NC-69 Stream Relocation 96 95.5 95 94.5 � 94 .�3.5 � 93 �2.5 92 91.5 91 —'—bed water srf o x-section o riffle crest o pool � run glide x LB + RB - bankiull + 0 36.0 � + (� � ,. � 0 97.0 115.0 50 11 150 200 250 Channel Distance (ft) APPENDIX C-3 SEDIMENT DATA Appendix C-3: Sediment Data A-OO11C Stream Relocation Design Hyatt Mill Creek Pebble Count 1 Riffle Surtace � Material Size Ran e mm Count silt/clay 0 - 0.062 v2ry fine sand 0.062 - 0.125 fine sand 0.125 - 0.25 medium sand 0.25 - 0.5 coarse sand 0.5 - 1 v�ery coarse sand 1- 2 very fine gravel 2_ 4 fine gravel 4 - 6 fine gra�21 6 - 8 medium gra�l 8 - 11 medium gravel 11 - 16 coarse gravel 16 - 22 coarse grav2l 22 - 32 �2ry coarse gravel 32 - 45 very coarse gravel 45 - 64 small cobble 64 - 90 medium cobble 90 - 128 large cobble 128 - 180 very large cobble 180 - 256 small boulder 256 - 362 small boulder 362 - 512 medium boulder 512 - 1024 large boulder 1024 - 2048 � lar e boulder 2048 - 4096 total particle count: 150 bedrock clay hardpan ----------- detritus/wood ----------- artificial total count: 150 Riffle Surface Pebble Count, NC-69 Stream Relocation 100% 90 % 80 % m 70 % w � 60 % � � 50 % U Q 4�% 30 % 20 % 10% 0% 0.01 Size D16 D35 D50 D65 D84 D95 6.4 11 17 22 35 54 . Size Distribution mean 15.0 dispersion 2.4 skewness -0.06 �cumulative % cobble 30 silt/clay 0% sand 7% gra�el 91 % cobble 2% boulder 0% 25 20 � c 3 � m 15 0 � m z � 10 m m 5 Note:I I� �I � 0 0.1 1 10 100 1000 10000 particle size (mm) Appendix C-3: Sediment Data A-OO11C Stream Relocation Design Hyatt Mill Creek Pebble Count 2 Riffle Surfa€e T Material Size Range (mm Count silt/clay 0 - 0.062 very fine sand 0.062 - 0.125 fine sand 0.125 - 0.25 medium sand 0.25 - 0.5 coarse sand 0.5 - 1 �ry coarse sand 1 - 2 �2ry fine gravel 2- 4 fine gravel 4 - 6 fine gravel 6 - 8 medium gravel 8 - 11 medium gravel 11 - 16 coarse graysl 16 - 22 coarse gravel 22 - 32 �nery coarse gravel 32 - 45 very coarse grav�el 45 - 64 small cobble 64 - 90 medium cobble 90 - 128 large cobble 128 - 180 v�ery large cobble 180 - 256 small boulder 256 - 362 small boulder 362 - 512 medium boulder 512 - 1024 large boulder 1024 - 2048 very large boulder 2048 - 4096 total particle count: 150 bedrock -- clay hardpan -- detritus/wood -- artificial - Cou � m � � � � � a� U � Q RifFle Surface Pebble Count, NC-69 Stream Relocation � cumulative % cobble 100 % 90% 80% 70% 60% 50% 40% 30% 20% 10% 0% C silt/cla sand ravel cobble boulder ----- ----------- -------- I i i i i i i ----- ----------- ------- i i i I � i i i i i � i � i i i i i i i i i � 0.1 Size (mm) D16 4,g D35 16 D50 20 D65 25 D84 35 D95 60 1 10 100 particle size (mm) Size Distribution 3.4 mean 13.1 12 dispersiori 2.9 17 skewness -0.20 20 29 39 1000 silt/clay po�o sand 14% gravel 82% cobble 4% boulder 0% �� 45 40 35 30 25 2� 15 10 5 0 JO � c � a� m 0 -6 w n� m � Note:l I� �I I Appendix C-3: Sediment Data A-OO11C Stream Relocation Design Hvatt Mill Creek Pebble Count 3 Bed Surfaee � Material Size Range (mm Count silt/clay 0 - 0.062 �nery fine sand 0.062 - 0.125 fine sand 0.125 - 0.25 medium sand 0.25 - 0.5 coarse sand 0.5 - 1 �ry coarse sand 1 - 2 vary fine grav2l 2- 4 fine grav�l 4 - 6 fine gravel 6 - 8 medium gravel 8 - 11 medium gravgl 11 - 16 coarse gravel 16 - 22 coarse gravel 22 - 32 �ry coarse grav�el 32 - 45 �ry coarse gravel 45 - 64 small cobble 64 - 90 medium cobble 90 - 128 large cobble 128 - 180 vsry large cobble 180 - 256 small boulder 256 - 362 small boulder 362 - 512 medium boulder 512 - 1024 large boulder 1024 - 2048 �2ry large boulder 2048 - 4096 total particle count: 156 bedrock -________ clay hardpan detritus/wood artificial total count: 156 100% 90 % 80 % � 70 % � a`> 60 % w � 50 % � Q 40% 30 % 20 % 10% 0% 0.01 Size (mm) ' D16 0.41 D35 7.1 D50 13 D65 19 D84 29 D95 44 Bed Surface Pebble Count, --- �cumulative % cobble Size Distribution mean 3.4 , dispersion 17.0 skewness -0.42 40 35 30 � 25 � � c� 20 0 v 15 � m y 10 5 Type silt/clay 0% sand 22% gravel 77% cobble 1 % boulder 0% Note: 0 0.1 1 10 100 1000 10000 particle size (mm) Appendix C-3: Sediment Data A-OO11C Stream Relocation Design Reference Reach 1 Pebble Count 1 Riffle Surtace � Material Size Ran e mm Count silt/clay 0 - 0.062 v2ry fine sand 0.062 - 0.125 fine sand 0.125 - 0.25 medium sand 0.25 - 0.5 coarse sand 0.5 - 1 v�ery coarse sand 1- 2 very fine gravel 2_ 4 fine gravel 4 - 6 fine gra�21 6 - 8 medium gra�l 8 - 11 medium gravel 11 - 16 coarse gravel 16 - 22 coarse grav2l 22 - 32 �2ry coarse gravel 32 - 45 very coarse gravel 45 - 64 small cobble 64 - 90 medium cobble 90 - 128 large cobble 128 - 180 very large cobble 180 - 256 small boulder 256 - 362 small boulder 362 - 512 medium boulder 512 - 1024 large boulder 1024 - 2048 � lar e boulder 2048 - 4096 total particle count: 150 bedrock clay hardpan ----------- detritus/wood ----------- artificial total count: 150 Riffle Surface Pebble Count, NC-69 Stream Relocation �cumulative % cobble 100% silt/cla sand ravel cobble boulder 25 90 % 80 % m 70 % � � 60 % � � 50 % U Q 40% 30 % 20 % 10% 0% 0.01 Size D16 D35 D50 D65 D84 D95 6.2 12 19 31 74 140 . Size Distribution mean 21.4 dispersion 3.5 skewness 0.05 silt/clay 0% sand 3% gra�el 79% cobble 18% boulder 1 % 20 � 15 a. m 0 � 10 � � m m 5 Note:I I� �I � 0 0.1 1 10 100 1000 10000 particle size (mm) Appendix C-3: Sediment Data A-OO11C Stream Relocation Design Reference Reach 1 Pebble Count 2 Riffle SurFa€e T Material Size Range (mm Count silt/clay 0 - 0.062 very fine sand 0.062 - 0.125 fine sand 0.125 - 0.25 medium sand 0.25 - 0.5 coarse sand 0.5 - 1 �ry coarse sand 1 - 2 �2ry fine gravel 2- 4 fine gravel 4 - 6 fine gravel 6 - 8 medium gravel 8 - 11 medium gravel 11 - 16 coarse graysl 16 - 22 coarse gravel 22 - 32 �nery coarse gravel 32 - 45 very coarse grav�el 45 - 64 small cobble 64 - 90 medium cobble 90 - 128 large cobble 128 - 180 v�ery large cobble 180 - 256 small boulder 256 - 362 small boulder 362 - 512 medium boulder 512 - 1024 large boulder 1024 - 2048 very large boulder 2048 - 4096 total particle count: 150 bedrock -- clay hardpan -- detritus/wood -- artificial - Cou � m � � � � � a� U � � RifFle Surface Pebble Count, NC-69 Stream Relocation �cumulative % cobble 100 % 90% 80% 70% 60% 50% 40% 30% 20% 10% 0% 0.01 Size (mm) D16 4,g D35 13 D50 23 D65 43 D84 84 D95 120 3.4 12 17 20 29 39 Size Distribution mean 20.3 dispersiori 4.2 skewness -0.05 silt/clay sand gravel cobble boulder 0% 8% 68% 24% 0% 18 16 14 12 10 8 6 4 2 0 10000 � c � a� m 0 -� w �' m � Note:l I� �I I 0.1 1 10 100 1000 particle size (mm) Appendix C-3: Sediment Data Bed Surfaee � Material Size Range (mm Count silt/clay 0 - 0.062 �nery fine sand 0.062 - 0.125 fine sand 0.125 - 0.25 medium sand 0.25 - 0.5 coarse sand 0.5 - 1 �ry coarse sand 1 - 2 vary fine grav2l 2- 4 fine grav�l 4 - 6 fine gravel 6 - 8 medium gravel 8 - 11 medium gravgl 11 - 16 coarse gravel 16 - 22 coarse gravel 22 - 32 �ry coarse grav�el 32 - 45 �ry coarse gravel 45 - 64 small cobble 64 - 90 medium cobble 90 - 128 large cobble 128 - 180 vsry large cobble 180 - 256 small boulder 256 - 362 small boulder 362 - 512 medium boulder 512 - 1024 large boulder 1024 - 2048 �2ry large boulder 2048 - 4096 total particle count: 150 bedrock -________ clay hardpan detritus/wood artificial total count: 150 A-OO11C Stream Relocation Design Reference Reach 1 Pebble Count 3 Bed Surface Pebble Count, --- �cumulative % cobble 100% 90 % 80 % � 70 % � a`> 60 % w � 50 % � Q 40% 30 % 20 % 10% 0% C silt/cla sand ra�l co ble boulder ----- ----------- --------- i i II �� i I I i ----- ----------- ------ i i i i i I i i I i i i 40 35 30 25 � � c� 20 0 v 15 � m y 10 5 1 1 � Size (mm) ' D16 6.8 D35 13 D50 17 D65 22 D84 29 D95 44 0 10 100 particle size (mm) Size Distribution mean 14.0 , dispersion 2.1 skewness -0.10 1000 10000 Type silt/clay 0% sand 10% gravel 88% cobble 2% boulder 0% Note: � �� �� � Appendix C-3: Sediment Data A-OO11C Stream Relocation Design Reference Reach 2 Pebble Count 1 Riffle Surtace � Material Size Ran e mm Count silt/clay 0 - 0.062 v2ry fine sand 0.062 - 0.125 fine sand 0.125 - 0.25 medium sand 0.25 - 0.5 coarse sand 0.5 - 1 v�ery coarse sand 1- 2 very fine gravel 2_ 4 fine gravel 4 - 6 fine gra�21 6 - 8 medium gra�l 8 - 11 medium gravel 11 - 16 coarse gravel 16 - 22 coarse grav2l 22 - 32 �2ry coarse gravel 32 - 45 very coarse gravel 45 - 64 small cobble 64 - 90 medium cobble 90 - 128 large cobble 128 - 180 very large cobble 180 - 256 small boulder 256 - 362 small boulder 362 - 512 medium boulder 512 - 1024 large boulder 1024 - 2048 � lar e boulder 2048 - 4096 total particle count: 150 bedrock clay hardpan ----------- detritus/wood ----------- artificial total count: 150 Riffle Surface Pebble Count, NC-69 Stream Relocation �cumulative % cobble 100% silt/cla sand ravel obble boulder 25 90 % 80 % m 70 % � � 60 % � � 50 % U Q 40% 30 % 20 % 10% 0% 0.01 Size D16 D35 D50 D65 D84 D95 4.6 8.7 13 18 29 42 . Size Distribution mean 11.5 dispersion 2.5 skewness -0.06 silt/clay 0% sand 9% gra�el 91 % cobble 1 % boulder 0% 20 � 15 a. m 0 � 10 � � m m 5 Note:I I� �I � 0 0.1 1 10 100 1000 10000 particle size (mm) Appendix C-3: Sediment Data A-OO11C Stream Relocation Design Reference Reach 2 Pebble Count 2 Riffle SurFa€e T Material Size Range (mm Count silt/clay 0 - 0.062 very fine sand 0.062 - 0.125 fine sand 0.125 - 0.25 medium sand 0.25 - 0.5 coarse sand 0.5 - 1 �ry coarse sand 1 - 2 �2ry fine gravel 2- 4 fine gravel 4 - 6 fine gravel 6 - 8 medium gravel 8 - 11 medium gravel 11 - 16 coarse graysl 16 - 22 coarse gravel 22 - 32 �nery coarse gravel 32 - 45 very coarse grav�el 45 - 64 small cobble 64 - 90 medium cobble 90 - 128 large cobble 128 - 180 v�ery large cobble 180 - 256 small boulder 256 - 362 small boulder 362 - 512 medium boulder 512 - 1024 large boulder 1024 - 2048 very large boulder 2048 - 4096 total particle count: 150 bedrock -- clay hardpan -- detritus/wood -- artificial - Cou � m � � � � � a� � � � Riffle Surface Pebble Count, NC-69 Stream Relocation �cumulative % cobble 100% silt/cla sand ravel cobble boulder 35 90% 80% 70% 60% 50% 40% 30% 20% 10% 0% C ----- ----------- ------ — I ��I 30 25 � c � 20 � 0 15 v �� 10 � 5 � � 0.1 Size (mm) D16 g,5 D35 13 D50 16 D65 21 D84 31 D95 50 1 10 100 particle size (mm) Size Distribution 3.4 mean 16.2 12 dispersiori 1.9 17 skewness 0.01 20 29 39 1000 silt/clay po�o sand 4% gravel 95% cobble 1% boulder 0% ���� Note:l I� �I I Appendix C-3: Sediment Data Bed Surtace � Material Size Ran e mm Count silt/clay 0 - 0.062 �2ry fine sand 0.062 - 0.125 fine sand 0.125 - 0.25 medium sand 0.25 - 0.5 coarse sand 0.5 - 1 �ry coarse sand 1 - 2 very fine gravel 2_ 4 fine gravel 4 - 6 fine gra�l 6 - 8 medium grawel 8 - 11 medium gravel 11 - 16 coarse gra�nel 16 - 22 coarse grav2l 22 - 32 �ry coarse gravel 32 - 45 very coarse gravel 45 - 64 small cobble 64 - 90 medium cobble 90 - 128 large cobble 128 - 180 very large cobble 180 - 256 small boulder 256 - 362 small boulder 362 - 512 medium boulder 512 - 1024 large boulder 1024 - 2048 � lar e boulder 2048 - 4096 total particle count: 150 bedrock clay hardpan detritus/wood ----------- artificial total count: 150 A-OO11C Stream Relocation Design Reference Reach 2 Pebble Count 3 Bed Surface Pebble Count, --- �cumulative % cobble 100% 90 % 80 % m 70 % � � 60 % � � 50 % U Q 40% 30 % 20 % 10% 0% C silt/cla sand ravel cobble boulder ---- ---------- ------ �� ----- ----------- ------ I i i �� i i i i i i i I � � Size (mm) � D16 5.4 D35 11 D50 14 D65 17 D84 21 D95 28 1 10 100 particle size (mm) Size Distribution mean 10.6 dispersion 2.0 skewness -0.15 1000 silt/clay 0% sand 9% gravel 91 % cobble 0% boulder 0% �� 45 40 35 30 � c � 25 � 0 2� � m � 15 c��o 10 5 0 )0 Note:I I� �I � APPENDIX D : H&H ANALYSIS Drainage Area Map � � � ,,— _�i;� -,/;-ir � -; �`=—� ,� >;)������j�l���� � ����i����� � — �� �i�/l/%/� � ��� �-,�� _ _; ��,�ii� � �. --� ---- �� � ��% —� . i�//� �lJ I 1�- % ��%��� =�° ���(( � � � _ %��i,��%���� I ��< (< <,� � \��\ \ i�%i���/ii�� ��\\\\\\ \� \�����i %i�i �%�%���D� � \ 1 ��- %i��/i��i��_�� \\ j1��� \ >>>�%//l/%%�jiiiii�����\�\\\� �1��\\� %iJ��II����( ���j �\\\�\�\�� � //�-� \ \ `��� �� --_ ��J)�1�\I�������� � ���� �,1� �� ����.,� `��iiiiii iI �.� �u ,>>� � \\�� �i„/� _ � J ) II.I.\` \\,\\ ` i//o// /r/Il, � �i�' %� =-- �—�� 1` \"��"%i %� % % ���%/%%%_ �� )/j))) �\\��\\(�((I((� ; ��j//�%�� ���-���, ��)j�1\\���\\�� %%/������,-� \;\��,; /j � � ���� J��I�II(I(I� ��,�� ��I� �/� i �� %�i�ii�i�%����1�11ii����ll�����nl�����1���/��i;��� = i%�i � �; ; �/i�� . �� 1 �, \�� �� �� ��\���\ � � ����� �� — = =—= = � �� ���0�� (l��r�1rr �\ i/� j%%%���%T\� �\�%ii��� \� �rl���l ��`��illll�r ���ii���� � ��� ����oc � ��� ��J%)J�)lll����\\� `������-.��� �� �� � ��c�� JJ�iii��;) �>> >>? 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C` . �� � I � �; :� � � � .. � ,_,� �� e r,� � � �� 7 Basin Characteristics Parameter Code �]3�I_\:7�_l PCTREG1 PCTREG2 PCTREG3 PCTREG4 PCTREG5 Parameter Description Area that drains to a point on a stream Percentage of drainage area located in Region 1 Percentage of drainage area located in Region 2 Percentage of drainage area located in Region 3 Percentage of drainage area located in Region 4 Percentage of drainage area located in Region 5 �; �r'�.-- _`.'�y.¢#{iv!�ii �I� �ol -' � � � �� ff ��� ��: — _���i� ���� s _-� � . —_ _ �5�. II.I.. ; Li7 I � ' ; `. t ,r. �r� .; VJinciy " .�, � iififi �, �,�1� Value Unit 0.35 square miles 0 100 0 0 0 percent percent percent percent percent Parameter Code Parameter Description Value Unit LC111MP Average percentage of impervious area determined from 3.04 percent NLCD 2011 impervious dataset BASINPERIM Perimeter of the drainage basin as defined in SIR 2004- 3.31 thousand 5262 feet BSLDEM30FT Mean basin slope, based on slope percent grid 17.9 percent CSL10_85fm Change in elevation between points 10 and 85 percent of 250.62 feet per length along main channel to basin divide divided by mi length between points ft per mi ELEV Mean Basin Elevation 2060 feet ELEVMAX Maximum basin elevation 2410 feet 124H50Y Maximum 24-hour precipitation that occurs on average 6.73 inches once in 50 years LC01 BARE Percentage of area barren land, NLCD 2001 category 31 0 percent LC01 CRPHAY Percentage of cultivated crops and hay, classes 81 and 16.926 percent 82, from NLCD 2001 LC01 DEV Percentage of land-use from NLCD 2001 classes 21-24 21.786 percent LC01 FOREST Percentage of forest from NLCD 2001 classes 41-43 57.812 percent LC01 HERB Percentage of herbaceous upland from NLCD 2001 class 2.879 percent 71 LC011MP Percent imperviousness of basin area 2001 NLCD 2.2 percent LC01 SHRUB Percent of area covered by shrubland using 2001 NLCD 0.596 percent LC01 WATER Percentage of open water, class 11, from NLCD 2001 0 percent LC01 WETLND Percentage of wetlands, classes 90 and 95, from NLCD 0 percent 2001 LC06BARE Percent of area covered by barren rock using 2006 NLCD 0 percent LC06DEV Percentage of land-use from NLCD 2006 classes 21-24 21.786 percent LC06FOREST Percentage of forest from NLCD 2006 classes 41-43 57.812 percent LC06GRASS Percent of area covered by grassland/herbaceous using 2.879 percent 2006 NLCD LC061MP Percentage of impervious area determined from NLCD 2.45 percent 2006 impervious dataset LC06PLANT Percent of area in cultivation using 2006 NLCD 16.926 percent LC06SHRUB Percent of area covered by shrubland using 2006 NLCD 0.596 percent Parameter Code Parameter Description Value Unit LC06WATER Percent of open water, class 11, from NLCD 2006 0 percent LC06WETLND Percent of area covered by wetland using 2006 NLCD 0 percent LC11 BARE Percentage of barren from NLCD 2011 class 31 0 percent LC1 1 CRPHAY Percentage of cultivated crops and hay, classes 81 and 16.926 percent 82, from NLCD 2011 LC11 DEV Percentage of developed (urban) land from NLCD 2011 21.8 percent classes 21-24 LC11 FOREST Percentage of forest from NLCD 2011 classes 41-43 57.812 percent LC1 1 GRASS Percent of area covered by grassland/herbaceous using 2.879 percent 2011 NLCD LC11 SHRUB Percent of area covered by shrubland using 2011 NLCD 0.596 percent LC11 WATER Percent of open water, class 11, from NLCD 2011 0 percent LC11 WETLND Percentage of wetlands, classes 90 and 95, from NLCD 0 percent 2011 LC92FOREST Percentage of forest from NLCD 1992 classes 41-43 73.198 percent LFPLENGTH Length of longest flow path 1.133 miles LU92BARE Percent of area covered by barren rock using 1992 NLCD 0 percent LU92DEV Percent of area covered by all densities of developed 0 percent land using 1992 NLCD LU92PLANT Percent of area in cultivation using 1992 NLCD 26.802 percent LU92WATER Percent of area covered by water using 1992 NLCD 0 percent LU92WETLN Percent of area covered by wetland using 1992 NLCD 0 percent MINBELEV Minimum basin elevation 1930 feet OUTLETELEV Elevation of the stream outlet in thousands of feet above 1926 feet NAVD88. PRECIP Mean Annual Precipitation 58.6 inches PROTECTED Percent of area of protected Federal and State owned 0 percent land SSURGOA Percentage of area of Hydrologic Soil Type A from 0 percent SSURGO SSURGOB Percentage of area of Hydrologic Soil Type B from 99.7 percent SSURGO Parameter Code [•Y•Y1�K�Z�7 SSURGOD Parameter Description Percentage of area of Hydrologic Soil Type C from SSURGO Percentage of area of Hydrologic Soil Type D from SSURGO UC%aCl P2a�C-F�OW StBtIStICS P8i8171@t2CS[Region2UrbanBlueRidgeFS007-00] Parameter Code DRNAREA Parameter Name Drainage Area Value Units 0.35 square miles Value Unit 0 percent 0 percent Min Max Limit Limit 0.04 41 2 54.6 LC11 IMP Percent_Impervious_NLCD2011 3.04 percent UCb81l P28k-F�OW StBtIStICS F�OW RepOCt [Region 2 Urban Blue Ridge FS007-00] PII: Prediction Interval-Lower, Plu: Prediction Interval-Upper, SEp: Standard Error of Prediction, SE: Standard Error (other -- see report) Statistic Value Unit SE Urban 2 Year Peak Flood 32.9 ft^3/s 40.4 Urban 5 Year Peak Flood 72.9 ft^3/s 38.5 Urban 10 Year Peak Flood 109 ft^3/s 38.3 Urban 25 Year Peak Flood 195 ft^3/s 38.7 Urban 50 Year Peak Flood 244 ft^3/s 37.8 Urban 100 Year Peak Flood 299 ft^3/s 37.8 Urban Peak-Flow Statistics Citations Mason, Robert R., Jr.; Fuste, Luis A.; King, Jeffrey N.; Thomas, Wilbert 0., Jr.,2002, The National Flood-Frequency Program -- Methods for Estimating Flood Magnitude and Frequency in Rural and Urban Areas in North Carolina, 2001: U.S. Geological Survey Fact Sheet 007-00, 4 p. (http://pubs.er.usgs.gov/publication/fs00700) PeBk-F�OW StBtIStICS P8i81ll2teCS[PeakSoutheastUSoverl sqmi20095158] Parameter Code Parameter Name Value Units Min Limit Max Limit Parameter Code Parameter Name DRNAREA Drainage Area PCTREG1 Percent Area in Region 1 PCTREG2 Percent Area in Region 2 PCTREG3 Percent Area in Region 3 PCTREG4 Percent Area in Region 4 PCTREG5 Percent Area in Region 5 Value Units Min Limit Max Limit 0.35 square miles 1 9000 0 percent 0 100 100 percent 0 100 0 percent 0 100 0 percent 0 100 0 percent 0 100 P@8k-F�OW StBtIStICS �ISC�81fl1@I'S[PeakSoutheastUSoverl sqmi20095158] One or more of the parameters is outside the suggested range. Estimates were extrapolated with unknown errors Peak-F�OW StatIStICS F�OW RepOCt[Peaksoutheastusoverl sqmi2oo9515E] $tBtIStIC 2 Year Peak Flood 5 Year Peak Flood 10 Year Peak Flood 25 Year Peak Flood 50 Year Peak Flood 100 Year Peak Flood 200 Year Peak Flood 500 Year Peak Flood Value 48.4 95.2 133 186 225 272 314 379 Unit ft^3/s ft^3/s ft^3/s ft"3/s ft"3/s ft^3/s ft^3/s ft^3/s Peak-Flow Statistics Citations Weaver, J.C., Feaster, T.D., and Gotvald, A.J.,2009, Magnitude and frequency of rural floods in the Southeastern United States, through 2006—Volume 2, North Carolina: U.S. Geological Survey Scientific Investigations Report 2009-5158, 111 p. (http://pubs.usgs.gov/sir/2009/5158/) USGS Data Disclaimer: Unless otherwise stated, all data, metadata and related materials are considered to satisfy the quality standards relative to the purpose for which the data were collected. 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Application Version: 4.2.1 WinTR- 5 5 winTR-55 Current Data Description --- Identification Data --- User: JLE Date: 1/16/2019 Project: A-OO11C Units: English SubTitle: Hyatt Mill Creek Natural Channel Areal Units: Acres State: North Carolina County: Clay Valley NOAA Filename: Y:\5961 NC NCDOT Div14\O1 A-011C Stream Relocation\200 Disciplines\219 Water Resources\Hydraul� --- Sub-Area Data --- Name Description Reach Area(ac) RCN Tc ------------------------------------------------------------------------------ Hyattl Natural Channel Outlet 224 62 .513 Total area: 224 (ac) --- Storm Data -- Rainfall Depth by Rainfall Return Period 2-Yr 5-Yr 10-Yr 25-Yr 50-Yr 100-Yr 1-Yr (in) (in) (in) (in) (in) (in) (in) -------------------------------------------------------------------------------- 3.72 4.58 5.25 6.18 6.93 7.7 3.11 Storm Data Source: User-provided custom storm data Rainfall Distribution Type: NOAA C Dimensionless Unit Hydrograph: <standard> WinTR-55, Version 1.00.10 Page 1 1/16/2019 12:08:16 PM JLE A-OO11C Hyatt Mill Creek Natural Channel Clay Valley NOAA County, North Carolina Storm Data Rainfall Depth by Rainfall Return Period 2-Yr 5-Yr 10-Yr 25-Yr 50-Yr 100-Yr 1-Yr (in) (in) (in) (in) (in) (in) (in) -------------------------------------------------------------------------------- 3.72 4.58 5.25 6.18 6.93 7.7 3.11 Storm Data Source: User-provided custom storm data Rainfall Distribution Type: NOAA C Dimensionless Unit Hydrograph: <standard> WinTR-55, Version 1.00.10 Page 1 1/16/2019 12:08:16 PM JLE A-OO11C Hyatt Mill Creek Natural Channel Clay Valley NOAA County, North Carolina Watershed Peak Table Sub-Area Peak Flow by Rainfall Return Period or Reach 2-Yr 5-Yr 10-Yr 25-Yr 50-Yr 100-Yr 1-Yr Identifier (cfs) (cfs) (cfs) (cfs) (cfs) (cfs) (cfs) ---------------------------------------------------------------------------------- SUBAREAS Hyattl 91.27 167.51 234.47 336.96 423.99 517.93 47.32 REACHES OUTLET 91.27 167.51 234.47 336.96 423.99 517.93 47.32 WinTR-55, Version 1.00.10 Page 1 1/16/2019 12:08:16 PM JLE A-OO11C Hyatt Mill Creek Natural Channel Clay Valley NOAA County, North Carolina Hydrograph Peak/Peak Time Table Sub-Area Peak Flow and Peak Time (hr) by Rainfall Return Period or Reach 2-Yr 5-Yr 10-Yr 25-Yr 50-Yr 100-Yr 1-Yr Identifier (cfs) (cfs) (cfs) (cfs) (cfs) (cfs) (cfs) (hr) (hr) (hr) (hr) (hr) (hr) (hr) ---------------------------------------------------------------------------------- SUBAREAS Hyattl 91.27 167.51 234.47 336.96 423.99 517.93 47.32 12.44 12.41 12.41 12.39 12.37 12.36 12.48 REACHES OUTLET 91.27 167.51 234.47 336.96 423.99 517.93 47.32 WinTR-55, Version 1.00.10 Page 1 1/16/2019 12:08:16 PM JLE A-OO11C Hyatt Mill Creek Natural Channel Clay Valley NOAA County, North Carolina Sub-Area Summary Table Sub-Area Drainage Time of Curve Receiving Sub-Area Identifier Area Concentration Number Reach Description (ac) (hr) -------------------------------------------------------------------------------- Hyattl 224.00 0.513 62 Outlet Natural Channel Total Area: 224 (ac) WinTR-55, Version 1.00.10 Page 1 1/16/2019 12:08:16 PM JLE A-OO11C Hyatt Mill Creek Natural Channel Clay Valley NOAA County, North Carolina Sub-Area Time of Concentration Details Sub-Area Flow Mannings's End Wetted Travel Identifier/ Length Slope n Area Perimeter Velocity Time (ft) (ft/ft) (sq ft) (ft) (ft/sec) (hr) -------------------------------------------------------------------------------- Hyattl SHEET 100 0.2500 0.800 0.210 SHALLOW 1420 0.2400 0.050 0.050 CHANNEL 1600 0.0600 0.055 12.00 15.00 5.698 0.078 CHANNEL 2600 0.0211 0.055 15.00 14.00 4.127 0.175 Time of Concentration .513 WinTR-55, Version 1.00.10 Page 1 1/16/2019 12:08:16 PM JLE A-OO11C Hyatt Mill Creek Natural Channel Clay Valley NOAA County, North Carolina Sub-Area Land Use and Curve Number Details Sub-Area Hydrologic Sub-Area Curve Identifier Land Use Soil Area Number Group (ac) -------------------------------------------------------------------------------- Hyattl Paved; curbs and storm sewers B 4.05 98 Commercial & business B 10.38 92 Residential districts (1 acre) B 10.74 68 Pasture, grassland or range (good) B 96.24 61 Woods - grass combination (good) B 102.59 58 Total Area / Weighted Curve Number 224 62 WinTR-55, Version 1.00.10 Page 1 1/16/2019 12:08:16 PM Existing Conditions HEC-RAS HyattMill_NCDOT Plan: HyattMill_Existing 1/17/2019 Legend WS 100 year � WS 50 year -.- WS 25 year . WS 10 year WS 2 year � WS Bankfull Ground Left Levee Right Levee � c 0 .� > � w Main Channel Distance (ft) 0 100 200 300 400 500 600 HyattMill_NCDOT Plan: HyattMill_Existing 1/17/2019 River = HyattMill Reach = HyattMill RS = 23 1 1 1 � c 1 0 .� � 1 w 1 1 1 1 1 1 � c ° 1 .� > � w � 1 1 1 1 1 � c 1 0 .� ' 1 � w 1 1 1 Legend WS 100 year � WS 50 year —.— WS 25 year a WS 10 year WS 2 year WS Bankfull ■ Ground • Bank Sta 200 Legend WS 100 year � WS 50 year �— WS 25 year � WS 10 year WS 2 year WS Bankfull ■ Ground • Bank Sta 200 Legend WS 100 year � WS 50 year —.— WS 25 year a WS 10 year WS 2 year WS Bankfull ■ Ground • Bank Sta 200 0 50 100 150 Station (ft) HyattMill_NCDOT Plan: HyattMill_Existing 1/17/2019 River = HyattMill Reach = HyattMill RS = 22 0 50 100 150 Station (ft) HyattMill_NCDOT Plan: HyattMill_Existing 1/17/2019 River = HyattMill Reach = HyattMill RS = 21 0 50 100 150 Station (ft) HyattMill_NCDOT Plan: HyattMill_Existing 1/17/2019 River = HyattMill Reach = HyattMill RS = 20 1 1 1 � c 1 0 .� � 1 w 1 1 1 1 1 1 � c 1 0 .� � 1 w 1 1 1 1 1 1 � c 1 0 .� ' 1 � w 1 1 1 Legend WS 100 year � WS 50 year —.— WS 25 year a WS 10 year WS 2 year WS Bankfull ■ Ground • Bank Sta 200 Legend WS 100 year � WS 50 year �— WS 25 year � WS 10 year WS 2 year WS Bankfull ■ Ground • Bank Sta 200 Legend WS 100 year � WS 50 year —.— WS 25 year a WS 10 year WS 2 year WS Bankfull ■ Ground • Bank Sta 200 0 50 100 150 Station (ft) HyattMill_NCDOT Plan: HyattMill_Existing 1/17/2019 River = HyattMill Reach = HyattMill RS = 19 0 50 100 150 Station (ft) HyattMill_NCDOT Plan: HyattMill_Existing 1/17/2019 River = HyattMill Reach = HyattMill RS = 18 0 50 100 150 Station (ft) HyattMill_NCDOT Plan: HyattMill_Existing 1/17/2019 River = HyattMill Reach = HyattMill RS = 17 1 1 1 � c 1 0 .� � 1 w 1 1 1 1 1 1 � c 1 0 .� � 1 w 1 1 1 1 1 1 � c 1 0 .� ' 1 � w 1 1 1 Legend WS 100 year � WS 50 year —.— WS 25 year a WS 10 year WS 2 year WS Bankfull ■ Ground • Bank Sta 200 Legend WS 100 year � WS 50 year �— WS 25 year � WS 10 year WS 2 year WS Bankfull ■ Ground • Bank Sta 200 Legend WS 100 year � WS 50 year —.— WS 25 year a WS 10 year WS 2 year WS Bankfull ■ Ground • Bank Sta 200 0 50 100 150 Station (ft) HyattMill_NCDOT Plan: HyattMill_Existing 1/17/2019 River = HyattMill Reach = HyattMill RS = 16 0 50 100 150 Station (ft) HyattMill_NCDOT Plan: HyattMill_Existing 1/17/2019 River = HyattMill Reach = HyattMill RS = 15 0 50 100 150 Station (ft) HyattMill_NCDOT Plan: HyattMill_Existing 1/17/2019 River = HyattMill Reach = HyattMill RS = 14 1 1 1 � c 1 0 .� � 1 w 1 1 1 1 1 1 � c 1 0 .� � 1 w 1 1 1 Station (ft) HyattMill_NCDOT Plan: HyattMill_Existing 1/17/2019 River = HyattMill Reach = HyattMill RS = 12 1 1 1 � c 1 0 .� ' 1 � w 1 1 1 Legend WS 100 year � WS 50 year �— WS 25 year a WS 10 year WS 2 year WS Bankfull ■ Ground Levee • Bank Sta 200 Legend WS 100 year � WS 50 year �— WS 25 year � WS 10 year WS 2 year WS Bankfull ■ Ground • Bank Sta 250 Legend WS 100 year � WS 50 year —.— WS 25 year a WS 10 year WS 2 year WS Bankfull ■ Ground • Bank Sta 250 Station (ft) 0 50 100 150 Station (ft) HyattMill_NCDOT Plan: HyattMill_Existing 1/17/2019 River = HyattMill Reach = HyattMill RS = 13 0 50 100 150 200 0 50 100 150 200 HyattMill_NCDOT Plan: HyattMill_Existing 1/17/2019 River = HyattMill Reach = HyattMill RS = 11 1 1 1 � c 1 0 .� � 1 w 1 1 1 0 Station (ft) HyattMill_NCDOT Plan: HyattMill_Existing 1/17/2019 River = HyattMill Reach = HyattMill RS = 10 1 1 1 � c 1 0 .� � 1 w 1 1 1 0 Station (ft) HyattMill_NCDOT Plan: HyattMill_Existing 1/17/2019 River = HyattMill Reach = HyattMill RS = 9 1 1 1 � c 1 0 .� ' 1 � w 1 1 1 0 Legend WS 100 year � WS 50 year —.— WS 25 year a WS 10 year WS 2 year WS Bankfull ■ Ground • Bank Sta 250 Legend WS 100 year � WS 50 year �— WS 25 year � WS 10 year WS 2 year WS Bankfull ■ Ground • Bank Sta 250 Legend WS 100 year � WS 50 year —.— WS 25 year a WS 10 year WS 2 year WS Bankfull ■ Ground • Bank Sta 250 Station (ft) 50 100 150 200 50 100 150 200 50 100 150 200 HyattMill_NCDOT Plan: HyattMill_Existing 1/17/2019 River = HyattMill Reach = HyattMill RS = 8 1 1 1 � c 1 0 .� � 1 w 1 1 1 0 1 1 1 � c 1 0 .� � 1 w 1 1 1 0 1 1 1 � 1 c ° 1 .� > w � 1 1___ 1926� 0 Station (ft) HyattMill_NCDOT Plan: HyattMill_Existing 1/17/2019 River = HyattMill Reach = HyattMill RS = 7.5 Culv 50 100 150 200 250 Station (ft) Legend WS 100 year � WS 50 year —.— WS 25 year a WS 10 year WS 2 year WS Bankfull ■ Ground • Bank Sta 250 Legend WS 100 year � WS 50 year �— WS 25 year � WS 10 year WS 2 year WS Bankfull ■ Ground • Bank Sta 250 Legend . WS 100 year � WS 50 year —.— WS 25 year a WS 10 year WS 2 year WS Bankfull ■ Ground • Bank Sta 300 50 100 150 200 50 100 150 200 Station (ft) HyattMill_NCDOT Plan: HyattMill_Existing 1/17/2019 River = HyattMill Reach = HyattMill RS = 7.5 Culv HyattMill_NCDOT Plan: HyattMill_Existing 1/17/2019 River = HyattMill Reach = HyattMill RS = 7 1 1 1 � c 1 0 .� � 1 w 1 1 1 0 1 1 1 � c 1 0 .� � 1 w 1 1 1 0 1 1 � 1 c ° 1 .� > � w � 1 1 0 Legend WS 100 year � WS 50 year —.— WS 25 year a WS 10 year WS 2 year WS Bankfull ■ Ground • Bank Sta 300 Legend WS 100 year � WS 50 year �— WS 25 year � WS 10 year WS 2 year WS Bankfull ■ Ground • Bank Sta 300 Legend WS 100 year � WS 50 year —.— WS 25 year a WS 10 year WS 2 year WS Bankfull ■ Ground • Bank Sta 300 50 100 150 200 250 Station (ft) HyattMill_NCDOT Plan: HyattMill_Existing 1/17/2019 River = HyattMill Reach = HyattMill RS = 6 50 100 150 200 250 Station (ft) HyattMill_NCDOT Plan: HyattMill_Existing 1/17/2019 River = HyattMill Reach = HyattMill RS = 5 50 100 150 200 250 Station (ft) HyattMill_NCDOT Plan: HyattMill_Existing 1/17/2019 River = HyattMill Reach = HyattMill RS = 4 1 1 � 1 c ° 1 .� > � w � 1 1 0 1 1 1 � c ° 1 .� > � w � 1 1 0 1 1 � 1 c 0 .� > �' 1 w 1 Legend WS 100 year � WS 50 year —.— WS 25 year a WS 10 year WS 2 year WS Bankfull ■ Ground • Bank Sta 300 Legend WS 100 year � WS 50 year �— WS 25 year � WS 10 year WS 2 year WS Bankfull ■ Ground • Bank Sta 300 Legend WS 100 year � WS 50 year —.— WS 25 year a WS 10 year WS 2 year WS Bankfull ■ Ground • Bank Sta 300 50 100 150 200 250 Station (ft) HyattMill_NCDOT Plan: HyattMill_Existing 1/17/2019 River = HyattMill Reach = HyattMill RS = 3 50 100 150 200 250 Station (ft) HyattMill_NCDOT Plan: HyattMill_Existing 1/17/2019 River = HyattMill Reach = HyattMill RS = 2 1 0 50 100 150 200 250 Station (ft) HyattMill_NCDOT Plan: HyattMill_Existing 1/17/2019 River = HyattMill Reach = HyattMill RS = 1 � c 0 .� > � w Legend WS 100 year � WS 50 year -.- WS 25 year a WS 10 year WS 2 year WS Bankfull ■ Ground • Bank Sta Station (ft) 0 50 100 150 200 250 HEGRAS Plan: EX River HyattMill Reach� HyattMill Reach River Sta Profile Q Total Min Ch EI W.S. Elev Crit W.S. E.G. Elev E.G. Slope Vel Chnl Flow Area Top Width Froude # Chl Shear Chan (cfs) (h) (h) (K) (K) (ft/ft) (ft/s) (59 h) (K) Ob/sq fl) HyatlMill 23 2year 91.27 1934.36� 1936.62 1936.11 1936.93 0.006345 4.50 20.63 14.90� 0.61 0.61 HyatlMill 23 10year 234.47 1934.36- 193776 1937.29 1938.40 0.006821 6.57 45.19 25.62 0.68 1.09 HyatlMill 23 25 year 336.96 1934.36 193829 1937.92 1939.13 0.007417 7.68 59.34 28.08 0.73 1.41 HyatlMill 23 50 year 423.99 1934.36 1938.68 1938.34 1939.68 0.007830 8.48 71.12 32.08 0.77 1.66 HyatlMill 23 100 year 517.93 1934.36 1939.02 1938.79 1940.19 0.008396 9.29 82.28 34.46 0.81 1.93 HyatlMill 23 Bankfull 39.00 1934.36 1935.85 1935.48 1936.03 0.006457 3.39 11.50 10.68 0.58 0.40 HyatlMill 22 2 year 91.27 1934.09 1935.99 1935.99 1936.65 0.019256 6.49 14.06 10J0 1.00 1.39 HyatlMill 22 10 year 234.47 1934.09 193722 193722 1938.15 0.012398 7.97 38.21 27.44 0.89 1.69 HyatlMill 22 25 year 336.96 1934.09 1937.58 1937.99 1938.83 0.014693 9.48 55J9 64.19 0.99 2.30 HyatlMill 22 50 year 423.99 1934.09 193773 1938.18 1939.31 0.018126 10.89 65.38 66.05 1.11 2.98 HyatlMill 22 100 year 517.93 1934.09 1937.88 1938.57 193977 0.021151 12.15 75.27 67.91 121 3.65 HyatlMill 22 Bankfull 39.00 1934.09 1935.31 1935.31 193574 0.021522 5.25 7.43 8.62 1.00 1.04 HyatlMill 21 2 year 91.27 1932.89 1934.86 193526 1936.19 0.042766 9.26 9.86 775 1.45 2.89 HyatlMill 21 10 year 234.47 1932.89 193626 1936.75 1937.85 0.028023 10.12 23.27 13.59 125 2.97 HyatlMill 21 25 year 336.96 1932.89 1936.98 1937.63 1938.59 0.019681 10.37 41.48 45.60 1.10 2.82 HyatlMill 21 50 year 423.99 1932.89 193Z24 1937.90 1939.08 0.020962 11.35 56.16 63.47 1.15 329 HyatlMill 21 100 year 517.93 1932.89 1937.43 1938.16 1939.51 0.022875 12.37 69.17 69.16 121 3.82 HyatlMill 21 Bankfull 39.00 1932.89 1934.15 1934.46 1935.16 0.060518 8.06 4.84 6.41 1.64 2.56 HyatlMill 20 2 year 91.27 1933.12 1935.08 1934.94 1935.55 0.013109 5.52 16.55 12.84 0.86 0.99 HyatlMill 20 10 year 234.47 1933.12 193574 1936.06 1937.02 0.024646 9.07 26.08 23.64 122 2.44 HyatlMill 20 25 year 336.96 1933.12 1936.04 1936.78 1937.89 0.029241 10.99 33.56 25.57 1.37 3.40 HyatlMill 20 50 year 423.99 1933.12 1936.35 1937.07 1938.39 0.027248 11.67 45.45 49.62 1.35 3.66 HyatlMill 20 100 year 517.93 1933.12 1936.58 1937.31 1938.80 0.027023 12.41 59A2 63.91 1.37 4.00 HyatlMill 20 Bankfull 39.00 1933.12 1934.37 1934.30 193470 0.016424 4.66 8.36 10.11 0.90 0.81 HyatlMill 19 2 year 91.27 1932.82 193478 1934.78 1935.38 0.018138 6.24 14.63 12.03 1.00 129 HyatlMill 19 10 year 234.47 1932.82 193577 1935.92 1936.80 0.017431 8.19 30.63 23.99 1.05 1.92 HyatlMill 19 25 year 336.96 1932.82 1936.12 1936.62 1937.53 0.019234 9.65 42.80 47.19 1.13 2.52 HyatlMill 19 50 year 423.99 1932.82 1936.30 1936.89 1938.06 0.022388 10.96 52.39 59.87 124 3.17 HyatlMill 19 100 year 517.93 1932.82 1936.50 1937.14 1938.49 0.023841 11.89 64.13 62.29 129 3.64 HyatlMill 19 Bankfull 39.00 1932.82 193423 1934.12 1934.55 0.014022 4.49 8.69 975 0.84 0.74 HyatlMill 18 2 year 91.27 1932.60 193423 1934.16 193471 0.014885 5.53 16.52 14.19 0.90 1.02 HyatlMill 18 10 year 234.47 1932.60 1934.91 1935.34 1936.12 0.022289 8.84 27.11 21.63 1.17 229 HyatlMill 18 25 year 336.96 1932.60 1935.32 1935.83 1936.82 0.021500 9.99 41.47 49.86 1.19 2.73 HyatlMill 18 50year 423.99 1932.60 1935.53 1936.11 1937.29 0.023177 11A2 52.82 56.28 125 322 HyatlMill 18 100year 517.93 1932.60 193575 1936.37 1937.66 0.023477 11J5 65.24 58.45 128 3.56 HyatlMill 18 Bankfull 39.00 1932.60 1933.64 1933.64 1933.97 0.020886 4.60 8.48 12.73 0.99 0.85 HyatlMill 17 2 year 91.27 1932.08 193424 1933.87 1934.58 0.008222 4.68 19.51 13.31 0.68 0.69 HyatlMill 17 10 year 234.47 1932.08 193476 1935.19 1935.94 0.020203 8.76 28.35 26.92 1.11 221 HyatlMill 17 25 year 336.96 1932.08 1935.17 1935.66 1936.65 0.020280 9.98 43J0 52.31 1.15 2.69 HyatlMill 17 50 year 423.99 1932.08 1935.36 1935.94 1937.12 0.022427 11.08 54.36 55.10 123 322 HyatlMill 17 100 year 517.93 1932.08 1935.59 193621 1937.48 0.022777 11.81 66.83 57.33 126 3.56 HyatlMill 17 Bankfull 39.00 1932.08 1933.57 1933.27 193376 0.007687 3.51 11.10 11.35 0.63 0.44 HyatlMill 16 2 year 91.27 1931.66 1933.67 1933.62 1934.18 0.016749 576 15.85 13.69 0.94 1.12 HyatlMill 16 10 year 234.47 1931.66 1934.69 1934.78 1935.42 0.012077 7.00 42.95 50.87 0.88 1.39 HyatlMill 16 25 year 336.96 1931.66 1934.97 193521 1935.94 0.014332 8.32 5778 56.04 0.98 1.87 HyatlMill 16 50 year 423.99 1931.66 1935.18 1935.50 1936.31 0.015447 9.17 70.23 6170 1.03 221 HyatlMill 16 100 year 517.93 1931.66 1935.36 1935.74 1936.66 0.016917 10.05 81.36 64.36 1.09 2.59 HyatlMill 16 Bankfull 39.00 1931.66 1933.01 1932.96 1933.37 0.017768 4.77 8.18 978 0.92 0.86 HyatlMill 15 2 year 91.27 1930.56 193374 1932.94 1933.98 0.004531 3.88 23.55 14.23 0.50 0.45 HyatlMill 15 10 year 234.47 1930.56 1934.07 1934.41 1935.16 0.017205 8A2 30.94 40.94 1.00 2.00 HyatlMill 15 25 year 336.96 1930.56 1934.56 1934.89 1935.69 0.014979 8.99 55.37 54.07 0.97 2.13 HyatlMill 15 50 year 423.99 1930.56 1934.83 1935.19 1936.07 0.015266 9.67 7078 60.68 0.99 2.39 HyatlMill 15 100 year 517.93 1930.56 1935.04 1935.43 1936.41 0.016108 10.42 84.23 63.06 1.03 2.70 HyatlMill 15 Bankfull 39.00 1930.56 1933.11 193228 1933.20 0.002493 2.44 16.01 11.18 0.36 0.19 HyatlMill 14 2 year 91.27 1930.30 1933.59 1933.03 1933.82 0.005904 4.00 29A2 32.71 0.54 0.50 HyatlMill 14 10 year 234.47 1930.30 1934.17 1934.11 1934.65 0.009802 6.28 64.59 61.88 0.73 1.12 HyatlMill 14 25 year 336.96 1930.30 1934.60 1934.45 1935.09 0.008781 6.67 92.09 65.51 0.71 1.19 HyatlMill 14 50 year 423.99 1930.30 1934.95 1934.67 1935.43 0.007885 6.85 115.31 68.42 0.69 120 HyatlMill 14 100 year 517.93 1930.30 1935.24 1934.89 193575 0.007773 7.22 135.27 70.83 070 1.30 HyatlMill 14 Bankfull 39.00 1930.30 1932.99 1932.32 1933.11 0.004233 2.73 14.57 15.73 0.43 026 HyatlMill 13 2 year 91.27 193076 1933.35 1933.35 193370 0.011730 4.98 26.48 51.49 075 0.83 HyatlMill 13 10 year 234.47 193076 1934.14 1933.98 1934.49 0.008620 578 74J0 66.62 070 0.96 HyatlMill 13 25 year 336.96 193076 1934.59 193427 1934.94 0.007261 6.03 105.86 70.48 0.66 0.98 HyatlMill 13 50 year 423.99 193076 1934.95 1934.47 1935.30 0.006473 6.20 131.30 73.49 0.64 0.99 HyatlMill 13 100 year 517.93 193076 1935.24 1934.67 1935.62 0.006397 6.56 152.94 75.98 0.64 1.07 HyatlMill 13 Bankfull 39.00 193076 1932.58 1932.58 1932.97 0.025706 5.00 7.80 10.03 1.00 1.01 HyatlMill 12 2 year 91.27 1929.96 1933.25 1932.30 1933.41 0.002724 3.40 39.47 41.61 0.40 0.32 HyatlMill 12 10 year 234.47 1929.96 1933.95 1933.55 1934.30 0.004962 5.51 70.64 52.01 0.57 0.77 HyatlMill 12 25 year 336.96 1929.96 1934.05 1933.94 1934.68 0.008639 7.44 76.39 56.57 075 1.40 HyatlMill 12 50 year 423.99 1929.96 193423 193423 1935.01 0.010352 8.46 87.66 67.58 0.83 1.77 HyatlMill 12 100 year 517.93 1929.96 1934.53 1934.53 1935.34 0.009998 8.83 109A2 73.39 0.83 1.87 HyatlMill 12 Bankfull 39.00 1929.96 1932.13 1931.52 1932.29 0.004835 3.30 11.83 8.81 0.50 0.36 HEGRAS Plan: EX River HyattMill Reach HyattMill (Continued) Reach River Sta Profile Q Total Min Ch EI W.S. Elev Crit W.S. E.G. Elev E.G. Slope Vel Chnl Flow Area Top Width Froude # Chl Shear Chan (cfs) (�) (h) (K) (K) (ft/ft) (ft/s) (59 h) (K) Ob/sq fl) HyatlMill 11 2year 91.27 1929.46� 1933.25 1931.88 1933.35 0.001623 2.90 61.15 8423 0.31 022 HyatlMill 11 10year 234.47 1929.46- 1934.00 1933.36 1934.18 0.002680 4.37 140.53 131.41 0.41 0.47 HyatlMill 11 25 year 336.96 1929.46 193421 1933.75 1934.46 0.003782 5.39 168.38 133.97 0.49 0.70 HyatlMill 11 50 year 423.99 1929.46 1934.44 1934.06 193472 0.004035 5.80 200.35 136.63 0.51 0.79 HyatlMill 11 100 year 517.93 1929.46 1934.64 193424 1934.94 0.004463 6.30 227.15 138.81 0.54 0.92 HyatlMill 11 Bankfull 39.00 1929.46 1932.10 1931.09 1932.21 0.002482 2.63 14.83 8.63 0.35 021 HyatlMill 10 2 year 91.27 1929.56 193326 1932.51 1933.31 0.000994 2.28 96.85 11026 024 0.14 HyatlMill 10 10 year 234.47 1929.56 1934.05 193321 1934.10 0.001195 2.93 195.64 138.14 027 021 HyatlMill 10 25 year 336.96 1929.56 193428 1933.40 1934.35 0.001619 3.56 228.21 142.19 0.32 0.30 HyatlMill 10 50 year 423.99 1929.56 1934.52 1933.56 1934.60 0.001733 3.83 262J2 146.28 0.33 0.34 HyatlMill 10 100 year 517.93 1929.56 193472 193374 1934.81 0.001914 4.15 292.69 150.00 0.35 0.40 HyatlMill 10 Bankfull 39.00 1929.56 1931.93 193120 1932.13 0.005285 3.59 11.17 8.86 0.49 0.41 HyatlMill 9 2 year 91.27 1929.65 193326 1932.23 1933.30 0.000715 2.13 106.81 104.90 021 0.11 HyatlMill 9 10 year 234.47 1929.65 1934.04 1933.04 1934.09 0.001058 3.00 201.00 136.47 027 021 HyatlMill 9 25 year 336.96 1929.65 193426 1933.31 1934.34 0.001476 3.68 232.34 140.35 0.32 0.31 HyatlMill 9 50 year 423.99 1929.65 1934.50 1933.49 1934.59 0.001607 3.98 266.05 144.21 0.33 0.36 HyatlMill 9 100year 517.93 1929.65 193470 1933.65 1934.80 0.001799 4.34 295.11 147.64 0.36 042 HyatlMill 9 Bankfull 39.00 1929.65 1931.92 1931.12 1932.07 0.003383 3.21 15.57 24.82 0.42 0.31 HyatlMill 8 2 year 91.27 1929.50 193325 1931.37 1933.28 0.000417 1.85 109.87 92.83 0.18 0.08 HyatlMill 8 10 year 234.47 1929.50 1934.00 1932.79 1934.07 0.000857 3.02 193.40 130.32 026 020 HyatlMill 8 25 year 336.96 1929.50 1934.19 1933.12 1934.30 0.001297 3.84 219.86 134.80 0.32 0.32 HyatlMill 8 50 year 423.99 1929.50 1934.42 193328 1934.55 0.001507 4.28 250.60 142.25 0.35 0.39 HyatlMill 8 100 year 517.93 1929.50 1934.60 1933.631 193475 0.001752 4.73 277.10 146.96 0.38 0.48 HyatlMill 8 Bankfull 39.00 1929.50 1931.94 1930.68 1932.01 0.000972 2.04 22.32 25.02 025 0.12 HyatlMill 7.5 Culvert HyatlMill 7 2 year 91.27 1927.98 1929.93 1929.93 1930.49 0.017869 6.00 15.21 13.34 0.99 121 HyatlMill 7 10 year 234.47 1927.98 1931.46 193125 1931.89 0.005368 5.56 65.43 87.56 0.62 0.80 HyatlMill 7 25 year 336.96 1927.98 193173 1931.73 1932.28 0.006496 6.55 91.60 103.13 0.69 1.07 HyatlMill 7 50 year 423.99 1927.98 1931.95 1931.95 1932.53 0.006763 7.03 115.00 110.41 0.71 121 HyatlMill 7 100 year 517.93 1927.98 1932.18 1932.18 193278 0.006747 7.38 142.28 123.46 0.72 1.30 HyatlMill 7 Bankfull 39.00 1927.98 1929.33 1929.33 192970 0.020162 4.89 7.98 10.54 0.99 0.92 HyatlMill 6 2year 91.27 1927.54 1929.44 1929.56 1930.18 0.023970 6.86 13.30 i1J0 1.14 1.60 HyatlMill 6 10 year 234.47 1927.54 193079 1930.79 1931.67 0.010702 7.63 36.36 44.40 0.86 1.53 HyatlMill 6 25 year 336.96 1927.54 1931.36 1931.56 1932.12 0.008176 7.67 81.07 104.65 0.78 1.44 HyatlMill 6 50 year 423.99 1927.54 1931.57 1931.81 1932.37 0.008593 8.22 103.44 110.16 0.81 1.62 HyatlMill 6 100 year 517.93 1927.54 193178 1932.00 1932.62 0.008888 8.71 128.51 126.71 0.83 1.78 HyatlMill 6 Bankfull 39.00 1927.54 192878 1928.89 1929.33 0.030324 5.93 6.57 8.69 120 1.36 HyatlMill 5 2 year 91.27 1926.28 1928.41 1928.14 1928.91 0.011232 5.71 16.36 13.06 0.78 1.00 HyatlMill 5 10 year 234.47 1926.28 1929.20 1929.47 1930.48 0.017866 9.35 30.44 22.34 1.06 2.36 HyatlMill 5 25 year 336.96 192628 1929.88 1930.53 1931.17 0.013985 974 48.20 31.13 0.97 2.36 HyatlMill 5 50 year 423.99 1926.28 1930.38 1930.82 1931.51 0.011073 9.57 83.14 120.69 0.89 2.17 HyatlMill 5 100 year 517.93 1926.28 1930.59 1930.94 193174 0.011315 10.06 110.60 137.99 0.91 2.35 HyatlMill 5 Bankfull 39.00 1926.28 1927.66 1927.44 1927.95 0.010823 4.29 9.09 8.41 0.73 0.65 HyatlMill 4 2 year 91.27 1925.60 1928.02 1927.89 1928.49 0.013880 5.53 1678 15.06 0.85 1.01 HyatlMill 4 10 year 234.47 1925.60 1928.92 1928.99 1929.85 0.014487 7.98 35.03 25.44 0.94 1.76 HyatlMill 4 25 year 336.96 1925.60 1929.18 1929.33 1930.61 0.019705 10.01 41.99 28.37 1.12 2.68 HyatlMill 4 50 year 423.99 1925.60 1929-64 1930.18 1931.04 0.016050 10.13 67.08 92.94 1.04 2.59 HyatlMill 4 100year 517.93 1925.60 1929.86 1930.46 1931.27 0.015820 10.56 91A2 115.30 1.05 2.75 HyatlMill 4 Bankfull 39.00 1925.60 1927.04 1926.94 1927.49 0.017211 5.35 Z29 6.36 0.88 1.01 HyatlMill 3 2 year 91.27 1925.40 1927.64 1927.64 1928.25 0.020650 6.30 14.53 13.15 1.01 1.35 HyatlMill 3 10 year 234.47 1925.40 1928.64 192878 1929.64 0.015803 8.27 34.26 26.19 0.98 1.90 HyatlMill 3 25 year 336.96 1925.40 1929.12 1929.57 1930.30 0.015245 9.25 54J9 61.88 1.00 223 HyatlMill 3 50 year 423.99 1925.40 1929.24 1929.92 193079 0.019362 1074 62.65 66.67 1.13 2.96 HyatlMill 3 100 year 517.93 1925.40 1929.53 1930.04 1931.03 0.017834 11.00 84.98 90.71 1.10 3.01 HyatlMill 3 Bankfull 39.00 1925.40 192671 1926.71 1927.23 0.021340 5.77 675 6.47 1.00 120 HyatlMill 2 2 year 91.27 1924.98 192673 1927.00 1927.88 0.034317 8.59 10.62 7.93 1.31 2.45 HyatlMill 2 10 year 234.47 1924.98 1928.46 1928.73 1929.47 0.011298 8.55 42.25 49J8 0.86 1.84 HyatlMill 2 25 year 336.96 1924.98 1928.82 1929.31 1930.11 0.013481 10.06 62.59 73.09 0.96 2.45 HyatlMill 2 50 year 423.99 1924.98 1928.97 1929.36 1930.55 0.016613 11.48 73.68 81.01 1.07 3.15 HyatlMill 2 100 year 517.93 1924.98 1929.19 1929.80 1930.80 0.016920 12.06 93.88 97.11 1.09 3.41 HyatlMill 2 Bankfull 39.00 1924.98 1926.00 192624 1926.84 0.045528 7.33 5.32 6.57 1.44 2.07 HyatlMill 1 2 year 91.27 192474 192628 1926.61 1927.48 0.038858 879 10.39 8.51 1 40 2.61 HyatlMill 1 10 year 234.47 192474 1927.56 1928.09 1929.23 0.022031 10.57 25.56 17.88 1.18 2.99 HyatlMill 1 25 year 336.96 192474 1928.39 1928.78 1929.92 0.014740 10.49 4976 51.27 1.02 2.67 HyatlMill 1 50 year 423.99 192474 1928.63 1929.50 1930.35 0.016082 11.48 62.93 56.98 1.07 3.13 HyatlMill 1 100 year 517.93 1924.74 1929.00 1929.66 1930.63 0.014513 11.65 88.99 88.49 1.04 3.11 HyatlMill 1 Bankfull 39.00 192474 192576 1925.89 1926.37 0.031543 6.25 6.24 7.58 122 1.49 HEC-RAS Plan: EX River: HyattMill Reach: HyattMill Reach River Sta Profile E.G. Elev W.S. Elev Vel Head Frctn Loss C& E Loss Q Left Q Channel Q Right Top Width (ft) (n) (n) (n) (n) (�rs� ��rs� ��rs) (n) HyattMill 23 2 year 1936.93 1936.62 0.31 0.05 0.00 0.10 91.15� 0.02 14.90 HyattMill 23 10 year 1938.40 1937.76 0.63 0.05 0.00 10.97 221.68 1.82 25.62 HyattMill 23 25 year 1939.13 1938.29 0.84 0.06 0.01 24.95 307.51 4.50 28.08 HyattMill 23 50 year 1939.68 1938.68 1.00 0.06 0.00 38.50 378.24 7.25 32.08 HyattMill 23 100 year 1940.19 1939.02 1.18 0.06 0.01 53.27 451.33 13.33 34.46 HyattMill 23 Bankfull 1936.03 1935.85 0.18 0.05 0.00 39.00 10.68 HyattMill 22 2 year 1936.65 1935.99 0.65 0.09 0.03 91.27 10.70 HyattMill 22 10 year 1938.15 1937.22 0.93 0.06 0.03 12.09 220.34 2.04 27.44 HyattMill 22 25 year 1938.83 1937.58 1.25 0.06 0.01 24.72 299.91 12.33 64.19 HyattMill 22 50 year 1939.31 1937.73 1.58 0.07 0.01 33.69 362.21 28.09 66.05 HyattMill 22 100 year 1939.77 1937.88 1.89 0.08 0.01 43.72 423.86 50.35 67.91 HyattMill 22 Bankfull 1935.74 1935.31 0.43 0.12 0.03 39.00 8.62 HyattMill 21 2 year 1936.19 1934.86 1.33 0.41 0.06 9127 7.75 HyattMill 21 10 year 1937.85 1936.26 1.59 0.74 0.09 0.03 234.43 0.01 13.59 HyattMill 21 25 year 1938.59 1936.98 1.61 0.67 0.02 9.90 324.21 2.85 45.60 HyattMill 21 50 year 1939.08 193724 1.84 0.67 0.02 19.18 38823 16.58 63.47 HyattMill 21 100 year 1939.51 1937.43 2.08 0.70 0.01 28.69 450.28 38.96 69.16 HyattMill 21 Bankfull 1935.16 1934.15 1.01 0.35 0.01 39.00 6.41 HyattMill 20 2 year 1935.55 1935.08 0.47 0.15 0.01 91.27 12.84 HyattMill 20 10 year 1937.02 1935.74 1.28 0.18 0.12 0.05 234.42 0.00 23.64 HyattMill 20 25 year 1937.89 1936.04 1.86 0.23 0.14 3.73 333.18 0.05 25.57 HyattMill 20 50 year 1938.39 1936.35 2.04 0.24 0.08 11.14 408.20 4.65 49.62 HyattMill 20 100 year 1938.80 1936.58 2.22 0.25 0.07 19.01 478.49 20.43 63.91 HyattMill 20 Bankfull 1934.70 1934.37 0.34 0.15 0.01 39.00 10.11 HyattMill 19 2 year 1935.38 1934.78 0.61 0.56 0.04 91.27 12.03 HyattMill 19 10 year 1936.80 1935.77 1.04 0.67 0.02 1.68 232.77 0.02 23.99 HyattMill 19 25 year 1937.53 1936.12 1.40 0.69 0.01 7.70 325.94 3.33 47.19 HyattMill 19 50 year 1938.06 1936.30 1.76 0.77 0.00 12.76 399.23 12.00 59.87 HyattMill 19 100 year 1938.49 1936.50 1.99 0.80 0.02 18.96 467.52 31.45 62.29 HyattMill 19 Bankfull 1934.55 1934.23 0.31 0.58 0.00 39.00 9.75 HyattMill 18 2 year 1934.71 1934.23 0.47 0.08 0.04 91.27 14.19 HyattMill 18 10 year 1936.12 1934.91 1.21 0.16 0.01 0.33 234.10 0.04 21.63 HyattMill 18 25 year 1936.82 1935.32 1.50 0.16 0.01 329 32620 7.47 49.86 HyattMill 18 50 year 193729 1935.53 1.76 0.18 0.00 6.81 394.46 22.71 5628 HyattMill 18 100 year 1937.66 1935.75 1.91 0.18 0.00 11.35 458.56 48.03 58.45 HyattMill 18 Bankfull 1933.97 1933.64 0.33 0.09 0.04 39.00 12.73 HyattMill 17 2 year 1934.58 1934.24 0.34 0.38 0.02 91.27 13.31 HyattMill 17 10 year 1935.94 1934.76 1.19 0.46 0.17 0.54 233.24 0.69 26.92 HyattMill 17 25 year 1936.65 1935.17 1.48 0.57 0.15 3.72 322.23 11.01 52.31 HyattMill 17 50 year 1937.12 1935.36 1.75 0.61 0.19 7.51 388.07 28.41 55.10 HyattMill 17 100 year 1937.48 1935.59 1.90 0.65 0.18 12.74 449.89 55.30 57.33 HyattMill 17 Bankfull 1933.76 1933.57 0.19 0.38 0.02 39.00 11.35 HyattMill 16 2 year 1934.18 1933.67 0.52 0.12 0.08 91.27 13.69 HyattMill 16 10 year 1935.42 1934.69 0.72 0.22 0.04 2.83 222.84 8.80 50.87 HyattMill 16 25 year 1935.94 1934.97 0.97 0.22 0.02 7.14 301.87 27.95 56.04 HyattMill 16 50 year 1936.31 1935.18 1.13 0.23 0.01 11.55 363.67 48.77 61.70 HyattMill 16 100 year 1936.66 1935.36 1.31 0.25 0.01 16.31 426.90 74.72 64.36 HyattMill 16 Bankfull 1933.37 1933.01 0.35 0.08 0.08 39.00 9.78 HyattMill 15 2 year 1933.98 1933.74 0.23 0.15 0.00 0.00 91.27 14.23 HyattMill 15 10 year 1935.16 1934.07 1.09 0.28 0.06 1.32 232.45 0.70 40.94 HyattMill 15 25 year 1935.69 1934.56 1.14 0.26 0.07 10.97 303.52 22.47 54.07 HyattMill 15 50 year 1936.07 1934.83 1.24 0.24 0.08 19.91 359.35 44.73 60.68 HyattMill 15 100 year 1936.41 1935.04 1.37 0.24 0.09 29.26 415.32 73.35 63.06 HyattMill 15 Bankfull 1933.20 1933.11 0.09 0.09 0.00 39.00 11.18 HyattMill 14 2 year 1933.82 1933.59 0.23 0.11 0.01 5.07 86.12 0.08 32.71 HyattMill 14 10 year 1934.65 1934.17 0.48 0.12 0.04 25.71 181.85 26.91 61.88 HyattMill 14 25 year 1935.09 1934.60 0.49 0.11 0.04 44.50 229.90 62.56 65.51 HyattMill 14 50 year 1935.43 1934.95 0.48 0.10 0.04 61.47 266.28 96.24 68.42 HyattMill 14 100 year 1935.75 1935.24 0.52 0.09 0.04 79.60 307.03 131.30 70.83 HEC-RAS Plan: EX River: HyattMill Reach: HyattMill (Continued) Reach River Sta Profile E.G. Elev W.S. Elev Vel Head Frctn Loss C& E Loss Q Left Q Channel Q Right Top Width (ft) (n) (n) (n) (n) (�rs� ��rs� ��rs) (n) HyattMill 14 Bankfull 1933.11 1932.99 0.12 0.11 0.03 0.06 38.94� 15.73 HyattMill 13 2 year 1933.70 1933.35 0.35 0.15 0.06 1.85 82.47 6.95 51.49 HyattMill 13 10 year 1934.49 1934.14 0.35 0.19 0.00 23.10 150.89 60.47 66.62 HyattMill 13 25 year 1934.94 1934.59 0.35 0.24 0.03 43.98 190.62 102.36 70.48 HyattMill 13 50 year 1935.30 1934.95 0.35 0.24 0.04 62.98 222.47 138.54 73.49 HyattMill 13 100 year 1935.62 1935.24 0.38 0.24 0.04 83.14 258.40 176.39 75.98 HyattMill 13 Bankfull 1932.97 1932.58 0.39 0.28 0.07 39.00 10.03 HyattMill 12 2 year 1933.41 1933.25 0.16 0.04 0.02 0.15 78.39 12.74 41.61 HyattMill 12 10 year 1934.30 1933.95 0.35 0.07 0.05 2.43 166.42 65.63 52.01 HyattMill 12 25 year 1934.68 1934.05 0.62 0.10 0.11 4.25 233.05 99.66 56.57 HyattMill 12 50 year 1935.01 1934.23 0.78 0.11 0.15 7.81 280.86 135.33 67.58 HyattMill 12 100 year 1935.34 1934.53 0.81 0.11 0.15 17.03 32023 180.67 73.39 HyattMill 12 Bankfull 1932.29 1932.13 0.17 0.07 0.02 39.00 8.81 HyattMill 11 2 year 1933.35 1933.25 0.11 0.03 0.02 6.44 72.79 12.04 84.23 HyattMill 11 10 year 1934.18 1934.00 0.18 0.04 0.04 50.86 139.15 44.46 131.41 HyattMill 11 25 year 1934.46 1934.21 0.26 0.05 0.06 89.00 181.96 66.00 133.97 HyattMill 11 50 year 1934.72 1934.44 028 0.06 0.06 130.80 208.15 85.05 136.63 HyattMill 11 100 year 1934.94 1934.64 0.31 0.06 0.06 175.60 237.03 105.30 138.81 HyattMill 11 Bankfull 1932.21 1932.10 0.11 0.07 0.01 39.00 8.63 HyattMill 10 2 year 1933.31 1933.26 0.04 0.01 0.00 36.78 45.62 8.87 110.26 HyattMill 10 10 year 1934.10 1934.05 0.05 0.01 0.00 134.85 74.65 24.97 138.14 HyattMill 10 25 year 1934.35 193428 0.07 0.02 0.00 204.15 96.22 36.59 142.19 HyattMill 10 50 year 1934.60 1934.52 0.08 0.02 0.00 267.20 109.90 46.89 146.28 HyattMill 10 100 year 1934.81 1934.72 0.09 0.02 0.00 334.92 125.02 57.99 150.00 HyattMill 10 Bankfull 1932.13 1931.93 0.20 0.04 0.01 38.82 0.18 8.86 HyattMill 9 2 year 1933.30 1933.26 0.04 0.01 0.00 39.80 42.45 9.02 104.90 HyattMill 9 10 year 1934.09 1934.04 0.05 0.02 0.00 134.34 74.40 25.73 136.47 HyattMill 9 25 year 1934.34 1934.26 0.08 0.03 0.00 203.25 96.40 37.31 140.35 HyattMill 9 50 year 1934.59 1934.50 0.08 0.04 0.00 266.35 110.30 47.34 14421 HyattMill 9 100 year 1934.80 1934.70 0.10 0.04 0.01 334.12 125.61 58.20 147.64 HyattMill 9 Bankfull 1932.07 1931.92 0.15 0.04 0.03 1.12 36.97 0.91 24.82 HyattMill 8 2 year 1933.28 1933.25 0.03 32.11 55.46 3.70 92.83 HyattMill 8 10 year 1934.07 1934.00 0.07 110.92 110.68 12.87 130.32 HyattMill 8 25 year 1934.30 1934.19 0.11 170.49 147.25 19.21 134.80 HyattMill 8 50 year 1934.55 1934.42 0.13 226.29 172.42 25.28 142.25 HyattMill 8 100 year 1934.75 1934.60 0.15 287.74 198.50 31.68 146.96 HyattMill 8 Bankfull 1932.01 1931.94 0.06 0.87 37.78 0.35 25.02 HyattMill 7.5 Culvert HyattMill 7 2 year 1930.49 1929.93 0.56 0.27 0.05 91.27 13.34 HyattMill 7 10 year 1931.89 1931.46 0.43 0.09 0.13 22.43 210.07 1.96 87.56 HyattMill 7 25 year 1932.28 1931.73 0.55 0.09 0.06 58.80 274.58 3.58 103.13 HyattMill 7 50 year 1932.53 1931.95 0.58 0.09 0.07 101.04 317.80 5.15 110.41 HyattMill 7 100 year 1932.78 1932.18 0.60 0.09 0.07 151.73 359.12 7.08 123.46 HyattMill 7 Bankfull 1929.70 1929.33 0.37 0.32 0.05 39.00 10.54 HyattMill 6 2 year 1930.18 1929.44 0.73 1.19 0.03 91.27 11.70 HyattMill 6 10 year 1931.67 1930.79 0.88 1.15 0.04 5.65 226.58 2.24 44.40 HyattMill 6 25 year 1932.12 1931.36 0.76 0.89 0.05 51.37 280.27 5.32 104.65 HyattMill 6 50 year 1932.37 1931.57 0.80 0.82 0.03 95.38 321.25 7.36 110.16 HyattMill 6 100 year 1932.62 1931.78 0.84 0.85 0.03 145.39 362.65 9.89 126.71 HyattMill 6 Bankfull 1929.33 1928.78 0.55 1.23 0.04 39.00 8.69 HyattMill 5 2 year 1928.91 1928.41 0.50 0.41 0.01 0.07 91.01 0.19 13.06 HyattMill 5 10 year 1930.48 1929.20 1.28 0.53 0.10 5.92 220.67 7.88 22.34 HyattMill 5 25 year 1931.17 1929.88 1.30 0.55 0.01 21.06 293.86 22.04 31.13 HyattMill 5 50 year 1931.51 1930.38 1.14 0.44 0.03 51.66 335.25 37.08 120.69 HyattMill 5 100 year 1931.74 1930.59 1.15 0.44 0.03 92.40 373.01 52.51 137.99 HyattMill 5 Bankfull 1927.95 1927.66 0.29 0.45 0.02 39.00 8.41 HyattMill 4 2 year 1928.49 1928.02 0.47 0.23 0.01 0.11 91.08 0.08 15.06 HEC-RAS Plan: EX River: HyattMill Reach: HyattMill (Continued) Reach River Sta Profile E.G. Elev W.S. Elev Vel Head Frctn Loss C& E Loss Q Left Q Channel Q Right Top Width (ft) (n) (n) (n) (n) (�rs� ��rs� ��rs) (n) HyattMill 4 10 year 1929.85 1928.92 0.93 0.20 0.01 6.28 22076�� 7.43 25.44 HyattMill 4 25 year 1930.61 1929.18 1.44 0.23 0.08 12.51 309.27 15.18 28.37 HyattMill 4 50 year 1931.04 1929.64 1.40 0.24 0.01 24.12 371.18 28.69 92.94 HyattMill 4 100 year 1931.27 1929.86 1.41 0.22 0.01 57.56 416.59 43.77 115.30 HyattMill 4 Bankfull 1927.49 1927.04 0.44 0.26 0.01 39.00 6.36 HyattMill 3 2 year 192825 1927.64 0.62 0.31 0.05 0.01 91.25 0.01 13.15 HyattMill 3 10 year 1929.64 1928.64 1.00 0.16 0.00 7.46 219.98 7.03 26.19 HyattMill 3 25 year 1930.30 1929.12 1.19 0.18 0.01 20.79 299.51 16.66 61.88 HyattMill 3 50 year 1930.79 1929.24 1.55 0.23 0.00 34.37 363.63 25.99 66.67 HyattMill 3 100 year 1931.03 1929.53 1.51 0.23 0.01 62.66 410.50 44.77 90.71 HyattMill 3 Bankfull 1927.23 1926.71 0.52 0.36 0.03 39.00 6.47 HyattMill 2 2 year 1927.88 1926.73 1.15 0.39 0.01 91.27 0.00 7.93 HyattMill 2 10 year 1929.47 1928.46 1.01 0.17 0.07 15.42 207.48 11.57 49.78 HyattMill 2 25 year 1930.11 1928.82 1.29 0.15 0.02 36.08 273.09 27.79 73.09 HyattMill 2 50 year 1930.55 1928.97 1.59 0.18 0.01 58.42 324.62 40.95 81.01 HyattMill 2 100 year 1930.80 1929.19 1.61 0.17 0.00 96.45 362.16 59.33 97.11 HyattMill 2 Bankfull 1926.84 1926.00 0.83 0.41 0.07 39.00 6.57 HyattMill 1 2 year 1927.48 1926.28 1.20 91.27 8.51 HyattMill 1 10 year 1929.23 1927.56 1.68 4.26 226.52 3.70 17.88 HyattMill 1 25 year 1929.92 1928.39 1.53 21.81 300.65 14.50 51.27 HyattMill 1 50 year 1930.35 1928.63 1.72 42.40 353.33 28.25 56.98 HyattMill 1 100 year 1930.63 1929.00 1.63 71.23 395.49 51.22 88.49 HyattMill 1 Bankfull 1926.37 1925.76 0.61 39.00 7.58 Proposed Conditions HEC-RAS HyattMill_NCDOT Plan: HyattMill_Proposed 1/17/2019 Legend WS 100 year � WS 50 year -.- WS 25 year . WS 10 year WS 2 year � WS Bankfull Ground � c 0 .� > � w Main Channel Distance (ft) 0 100 200 300 400 500 600 700 HyattMill_NCDOT Plan: HyattMill_Proposed 1/17/2019 River = HyattMill Reach = HyattMill RS = 23 1 1 1 � 1 c ° 1 .� > w � 1 1 1 1 1 1 1 � � 1 0 > 1 � w � 1 1 1 1 1 1 � 1 � 1 0 > 1 � w � 1 1 1 Legend . WS 100 year � WS 50 year —.— WS 25 year a WS 10 year WS 2 year WS Bankfull ■ Ground • Bank Sta 200 Legend WS 100 year � WS 50 year �— WS 25 year WS 10 year WS 2 year WS Bankfull ■ Ground • Bank Sta 200 Legend WS 100 year � WS 50 year —.— WS 25 year WS 10 year WS 2 year WS Bankfull ■ Ground • Bank Sta 200 0 50 100 150 Station (ft) HyattMill_NCDOT Plan: HyattMill_Proposed 1/17/2019 River = HyattMill Reach = HyattMill RS = 22.1 0 50 100 150 Station (ft) HyattMill_NCDOT Plan: HyattMill_Proposed 1/17/2019 River = HyattMill Reach = HyattMill RS = 22 0 50 100 150 Station (ft) HyattMill_NCDOT Plan: HyattMill_Proposed 1/17/2019 River = HyattMill Reach = HyattMill RS = 21 1 1 1 � 1 � 1 0 > 1 � w � 1 1 1 1 1 1 1 � � 1 0 > 1 � w � 1 1 1 1 1 1 � 1 c ° 1 .� > w � 1 1 1 Legend WS 100 year � WS 50 year —.— WS 25 year WS 10 year WS 2 year WS Bankfull ■ Ground • Bank Sta 200 Legend WS 100 year � WS 50 year �— WS 25 year WS 10 year WS 2 year WS Bankfull ■ Ground • Bank Sta 200 Legend . WS 100 year � WS 50 year —.— WS 25 year a WS 10 year WS 2 year WS Bankfull ■ Ground • Bank Sta 200 0 50 100 150 Station (ft) HyattMill_NCDOT Plan: HyattMill_Proposed 1/17/2019 River = HyattMill Reach = HyattMill RS = 20.1 0 50 100 150 Station (ft) HyattMill_NCDOT Plan: HyattMill_Proposed 1/17/2019 River = HyattMill Reach = HyattMill RS = 20 0 50 100 150 Station (ft) HyattMill_NCDOT Plan: HyattMill_Proposed 1/17/2019 River = HyattMill Reach = HyattMill RS = 19.1 1 1 1 � 1 c ° 1 .� > w � 1 1 1 1 1 1 � 1 c ° 1 .� > � w � 1 1 1 1 1 1 � 1 � 1 0 > 1 � w � 1 1 1 Legend . WS 100 year � WS 50 year —.— WS 25 year a WS 10 year WS 2 year WS Bankfull ■ Ground • Bank Sta 200 Legend ■ WS 100 year � WS 50 year �— WS 25 year � WS 10 year WS 2 year WS Bankfull ■ Ground • Bank Sta 200 Legend WS 100 year � WS 50 year —.— WS 25 year WS 10 year WS 2 year WS Bankfull ■ Ground • Bank Sta 200 0 50 100 150 Station (ft) HyattMill_NCDOT Plan: HyattMill_Proposed 1/17/2019 River = HyattMill Reach = HyattMill RS = 18.1 0 50 100 150 Station (ft) HyattMill_NCDOT Plan: HyattMill_Proposed 1/17/2019 River = HyattMill Reach = HyattMill RS = 18 0 50 100 150 Station (ft) HyattMill_NCDOT Plan: HyattMill_Proposed 1/17/2019 River = HyattMill Reach = HyattMill RS = 17 1 1 1 � 1 c ° 1 .� > w � 1 1 1 1 1 1 1 � � 1 0 > 1 � w � 1 1 1 1 1 1 � 1 c ° 1 .� > w � 1 1 1 Legend . WS 100 year � WS 50 year —.— WS 25 year a WS 10 year WS 2 year WS Bankfull ■ Ground • Bank Sta 200 Legend WS 100 year � WS 50 year �— WS 25 year WS 10 year WS 2 year WS Bankfull ■ Ground • Bank Sta 200 Legend . WS 100 year � WS 50 year —.— WS 25 year a WS 10 year WS 2 year WS Bankfull ■ Ground • Bank Sta 200 0 50 100 150 Station (ft) HyattMill_NCDOT Plan: HyattMill_Proposed 1/17/2019 River = HyattMill Reach = HyattMill RS = 16.1 0 50 100 150 Station (ft) HyattMill_NCDOT Plan: HyattMill_Proposed 1/17/2019 River = HyattMill Reach = HyattMill RS = 16 0 50 100 150 Station (ft) HyattMill_NCDOT Plan: HyattMill_Proposed 1/17/2019 River = HyattMill Reach = HyattMill RS = 15 1 1 1 � 1 c ° 1 .� > w � 1 1 1 1 1 1 � 1 c ° 1 .� > � w � 1 1 1 1 1 1 � 1 � 1 0 > 1 � w � 1 1 1 Legend . WS 100 year � WS 50 year —.— WS 25 year a WS 10 year WS 2 year WS Bankfull ■ Ground • Bank Sta 200 Legend ■ WS 100 year � WS 50 year �— WS 25 year � WS 10 year WS 2 year WS Bankfull ■ Ground • Bank Sta 200 Legend WS 100 year � WS 50 year —.— WS 25 year WS 10 year WS 2 year WS Bankfull ■ Ground • Bank Sta 200 0 50 100 150 Station (ft) HyattMill_NCDOT Plan: HyattMill_Proposed 1/17/2019 River = HyattMill Reach = HyattMill RS = 14.1 0 50 100 150 Station (ft) HyattMill_NCDOT Plan: HyattMill_Proposed 1/17/2019 River = HyattMill Reach = HyattMill RS = 14 0 50 100 150 Station (ft) HyattMill_NCDOT Plan: HyattMill_Proposed 1/17/2019 River = HyattMill Reach = HyattMill RS = 13 1 1 1 � 1 c ° 1 .� > w � 1 1 1 0 Station (ft) HyattMill_NCDOT Plan: HyattMill_Proposed 1/17/2019 River = HyattMill Reach = HyattMill RS = 12.1 1 1 1 � 1 c ° 1 .� > � w � 1 1 1 0 Station (ft) HyattMill_NCDOT Plan: HyattMill_Proposed 1/17/2019 River = HyattMill Reach = HyattMill RS = 12 1 1 1 � 1 � 1 0 > 1 � w � 1 1 1 0 Legend . WS 100 year � WS 50 year —.— WS 25 year a WS 10 year WS 2 year WS Bankfull ■ Ground • Bank Sta 250 Legend ■ WS 100 year � WS 50 year �— WS 25 year � WS 10 year WS 2 year WS Bankfull ■ Ground • Bank Sta 250 Legend WS 100 year � WS 50 year —.— WS 25 year WS 10 year WS 2 year WS Bankfull ■ Ground • Bank Sta 250 Station (ft) 50 100 150 200 50 100 150 200 50 100 150 200 HyattMill_NCDOT Plan: HyattMill_Proposed 1/17/2019 River = HyattMill Reach = HyattMill RS = 11 1 1 1 � c 1 0 .� � 1 w 1 1 1 0 Station (ft) HyattMill_NCDOT Plan: HyattMill_Proposed 1/17/2019 River = HyattMill Reach = HyattMill RS = 10.1 1 1 1 � 1 c ° 1 .� > � w � 1 1 1 0 Station (ft) HyattMill_NCDOT Plan: HyattMill_Proposed 1/17/2019 River = HyattMill Reach = HyattMill RS = 10 1 1 1 � 1 c ° 1 .� > w � 1 1 1 0 Legend WS 100 year � WS 50 year —.— WS 25 year a WS 10 year WS 2 year WS Bankfull ■ Ground • Bank Sta 250 Legend ■ WS 100 year � WS 50 year �— WS 25 year � WS 10 year WS 2 year WS Bankfull ■ Ground • Bank Sta 250 Legend . WS 100 year � WS 50 year —.— WS 25 year a WS 10 year WS 2 year WS Bankfull ■ Ground • Bank Sta 250 Station (ft) 50 100 150 200 50 100 150 200 50 100 150 200 HyattMill_NCDOT Plan: HyattMill_Proposed 1/17/2019 River = HyattMill Reach = HyattMill RS = 9 1 1 1 � 1 c ° 1 .� > w � 1 1 1 0 Station (ft) HyattMill_NCDOT Plan: HyattMill_Proposed 1/17/2019 River = HyattMill Reach = HyattMill RS = 8.1 1 1 1 � 1 c ° 1 .� > � w � 1 1 1 0 Station (ft) HyattMill_NCDOT Plan: HyattMill_Proposed 1/17/2019 River = HyattMill Reach = HyattMill RS = 8 1 1 1 � 1 c ° 1 .� > w � 1 1 1 0 Legend . WS 100 year � WS 50 year —.— WS 25 year a WS 10 year WS 2 year WS Bankfull ■ Ground • Bank Sta 250 Legend ■ WS 100 year � WS 50 year �— WS 25 year � WS 10 year WS 2 year WS Bankfull ■ Ground • Bank Sta 250 Legend . WS 100 year � WS 50 year —.— WS 25 year a WS 10 year WS 2 year WS Bankfull ■ Ground • Bank Sta 250 Station (ft) 50 100 150 200 50 100 150 200 50 100 150 200 HyattMill_NCDOT Plan: HyattMill_Proposed 1/17/2019 River = HyattMill Reach = HyattMill RS = 7.5 1 1 1 � 1 c ° 1 .� > w � 1 1 1 0 Station (ft) HyattMill_NCDOT Plan: HyattMill_Proposed 1/17/2019 River = HyattMill Reach = HyattMill RS = 7.4 1 1 1 � c 1 0 .� � 1 w 1 1 1 0 Station (ft) HyattMill_NCDOT Plan: HyattMill_Proposed 1/17/2019 River = HyattMill Reach = HyattMill RS = 7.3 1 1 1 � 1 c ° 1 .� > w � 1 1 1 0 Legend . WS 100 year � WS 50 year —.— WS 25 year a WS 10 year WS 2 year WS Bankfull ■ Ground • Bank Sta 250 Legend WS 100 year � WS 50 year �— WS 25 year � WS 10 year WS 2 year WS Bankfull ■ Ground • Bank Sta 250 Legend . WS 100 year � WS 50 year —.— WS 25 year a WS 10 year WS 2 year WS Bankfull ■ Ground • Bank Sta 250 Station (ft) 50 100 150 200 50 100 150 200 50 100 150 200 HyattMill_NCDOT Plan: HyattMill_Proposed 1/17/2019 River = HyattMill Reach = HyattMill RS = 7.2 1 1 1 � c 1 0 .� � 1 w 1 1 1 1 1 1 � c 1 0 .� � 1 w 1 1 1 1 1 1 � 1 c ° 1 .� > w � 1 1 1 Legend WS 100 year � WS 50 year —.— WS 25 year a WS 10 year WS 2 year WS Bankfull ■ Ground • Bank Sta 300 Legend WS 100 year � WS 50 year �— WS 25 year � WS 10 year WS 2 year WS Bankfull ■ Ground • Bank Sta 300 Legend . WS 100 year � WS 50 year —.— WS 25 year a WS 10 year WS 2 year WS Bankfull ■ Ground • Bank Sta 300 0 50 100 150 200 250 Station (ft) HyattMill_NCDOT Plan: HyattMill_Proposed 1/17/2019 River = HyattMill Reach = HyattMill RS = 7.1 0 50 100 150 200 250 Station (ft) HyattMill_NCDOT Plan: HyattMill_Proposed 1/17/2019 River = HyattMill Reach = HyattMill RS = 7 0 50 100 150 200 250 Station (ft) HyattMill_NCDOT Plan: HyattMill_Proposed 1/17/2019 River = HyattMill Reach = HyattMill RS = 6 1 1 1 � 1 c ° 1 .� > w � 1 1 1 1 1 1 � 1 c ° 1 .� > � w � 1 1 1 1 1 1 � 1 c ° 1 .� > w � 1 1 1 Legend . WS 100 year � WS 50 year —.— WS 25 year a WS 10 year WS 2 year WS Bankfull ■ Ground • Bank Sta 300 Legend ■ WS 100 year � WS 50 year �— WS 25 year � WS 10 year WS 2 year WS Bankfull ■ Ground • Bank Sta 300 Legend . WS 100 year � WS 50 year �— WS 25 year a WS 10 year WS 2 year WS Bankfull ■ Ground • Bank Sta 300 0 50 100 150 200 250 Station (ft) HyattMill_NCDOT Plan: HyattMill_Proposed 1/17/2019 River = HyattMill Reach = HyattMill RS = 5.5 Culv Proposed Driveway Culvert 0 50 100 150 200 250 Station (ft) HyattMill_NCDOT Plan: HyattMill_Proposed 1/17/2019 River = HyattMill Reach = HyattMill RS = 5.5 Culv Proposed Driveway Culvert 0 50 100 150 200 250 Station (ft) HyattMill_NCDOT Plan: HyattMill_Proposed 1/17/2019 River = HyattMill Reach = HyattMill RS = 4.1 1 1 1 � 1 c ° 1 .� > w � 1 1 1 1 1 1 � 1 c ° 1 .� > � w � 1 1 1 1 1 1 � 1 c ° 1 .� > w � 1 1 1 Legend . WS 100 year � WS 50 year —.— WS 25 year a WS 10 year WS 2 year WS Bankfull ■ Ground • Bank Sta 300 Legend ■ WS 100 year � WS 50 year �— WS 25 year � WS 10 year WS 2 year WS Bankfull ■ Ground • Bank Sta 300 Legend . WS 100 year � WS 50 year —.— WS 25 year a WS 10 year WS 2 year WS Bankfull ■ Ground • Bank Sta 300 0 50 100 150 200 250 Station (ft) HyattMill_NCDOT Plan: HyattMill_Proposed 1/17/2019 River = HyattMill Reach = HyattMill RS = 4 0 50 100 150 200 250 Station (ft) HyattMill_NCDOT Plan: HyattMill_Proposed 1/17/2019 River = HyattMill Reach = HyattMill RS = 3 0 50 100 150 200 250 Station (ft) HyattMill_NCDOT Plan: HyattMill_Proposed 1/17/2019 River = HyattMill Reach = HyattMill RS = 2.1 1 1 1 � 1 c ° 1 .� > w � 1 1 1 1 1 1 � 1 c ° 1 .� > � w � 1 1 1 1 1 1 � 1 c ° 1 .� > w � 1 1 1 Legend . WS 100 year � WS 50 year —.— WS 25 year a WS 10 year WS 2 year WS Bankfull ■ Ground • Bank Sta 300 Legend ■ WS 100 year � WS 50 year �— WS 25 year � WS 10 year WS 2 year WS Bankfull ■ Ground • Bank Sta 300 Legend . WS 100 year � WS 50 year —.— WS 25 year a WS 10 year WS 2 year WS Bankfull ■ Ground • Bank Sta 250 Station (ft) 0 50 100 150 200 250 Station (ft) HyattMill_NCDOT Plan: HyattMill_Proposed 1/17/2019 River = HyattMill Reach = HyattMill RS = 2 0 50 100 150 200 250 Station (ft) HyattMill_NCDOT Plan: HyattMill_Proposed 1/17/2019 River = HyattMill Reach = HyattMill RS = 1 0 50 100 150 200 HyattMill_NCDOT Plan: HyattMill_Proposed 1/17/2019 River = HyattMill Reach = HyattMill RS = 0.1 � c 0 .� > � w Legend WS 100 year � WS 50 year -.- WS 25 year a WS 10 year WS 2 year WS Bankfull ■ Ground • Bank Sta Station (ft) 0 50 100 150 200 250 HEGRAS Plan: PR River HyattMill Reach: HyattMill Reach River Sta Profile Q Total Min Ch EI W.S. Elev Crit W.S. E.G. Elev E.G. Slope Vel Chnl Flow Area Top Width Froude # Chl Shear Chan (cfs) (h) (h) (K) (K) (ft/ft) (ft/s) (59 h) (K) Ob/sq fl) HyatlMill 23 2 year 91.27 1934.18 1935.98 1935.98 1936.45 0.011701 5.73 20.94 27.41 0.84 1.02 HyatlMill 23 10 year 234.47 1934.18 1936.83 1936.83 1937.57 0.011688 776 46.85 33.85 0.90 1.61 HyatlMill 23 25 year 336.96 1934.18 193728 193726 1938.16 0.011583 8.71 62.95 37.17 0.92 1.90 HyatlMill 23 50 year 423.99 1934.18 193774 1937.59 1938.61 0.009715 8.85 80.71 39.22 0.87 1.86 HyatlMill 23 100 year 517.93 1934.18 1938.10 1937.91 1939.05 0.009475 9.37 94.92 40.52 0.87 2.02 HyatlMill 23 Bankfull 39.00 1934.18 1935.29 193529 1935.69 0.020448 5.06 770 9.67 1.00 0.97 HyatlMill 22.1 2 year 91.27 193370 1935.84 1935.49 1936.12 0.005402 4.47 27.91 27.58 0.59 0.58 HyatlMill 22.1 10 year 234.47 193370 1936.83 1936.42 1937.31 0.005951 6.29 58.60 34.23 0.66 0.99 HyatlMill 22.1 25 year 336.96 193370 1937.35 1936.87 1937.95 0.006218 7.20 77.05 37.60 070 122 HyatlMill 22.1 50 year 423.99 193370 193773 193722 1938.44 0.006582 7.96 9176 43.62 0.73 1 44 HyatlMill 22.1 100 year 517.93 193370 1937.99 1937.56 1938.90 0.007720 9.03 104.09 47J8 0.80 1.81 HyatlMill 22.1 Bankfull 39.00 1933.70 1935.17 1934.80 1935.35 0.005936 3.43 12.12 16.38 0.57 0.40 HyatlMill 22 2 year 91.27 193270 1935.88 1934.99 1936.04 0.002604 3.46 34.38 27.73 0.41 0.33 HyatlMill 22 10 year 234.47 193270 1936.86 1936.12 1937.23 0.003860 5.40 65.27 35.12 0.54 0.71 HyatlMill 22 25 year 336.96 193270 1937.37 1936.60 1937.86 0.004312 6.31 84.58 43.37 0.58 0.92 HyatlMill 22 50 year 423.99 193270 193775 1937.00 1938.35 0.004788 7.09 101.42 45J4 OB2 1.12 HyatlMill 22 100 year 517.93 193270 1938.08 1937.55 193876 0.005043 7.67 116.83 46.91 0.65 128 HyatlMill 22 Bankfull 39.00 193270 193520 1934.31 1935.28 0.001973 2.35 17.65 18.94 0.34 0.17 HyatlMill 21 2 year 91.27 193370 1935.48 1935.48 1935.96 0.012395 5.82 20.46 26.19 0.86 1.06 HyatlMill 21 10 year 234.47 1933.70 1936.48 1936.35 1937.14 0.009752 7.35 50.32 33.49 0.83 1.41 HyatlMill 21 25 year 336.96 193370 1936.84 1936.84 193775 0.011594 878 62.73 37J0 0.93 1.93 HyatlMill 21 50 year 423.99 193370 1937.30 1937.30 1938.25 0.010162 9.12 82.33 43.11 0.89 1.97 HyatlMill 21 100 year 517.93 193370 1937.81 1937.58 1938.68 0.008147 8.99 104.54 44J8 0.82 1.83 HyatlMill 21 Bankfull 39.00 193370 1934.82 1934.82 1935.21 0.020047 5.02 7.77 975 0.99 0.95 HyatlMill 20.1 2 year 91.27 1933.30 193523 1935.08 1935.65 0.009294 5.39 21.23 22.77 0.75 0.88 HyatlMill 20.1 10 year 234.47 1933.30 1935.91 1936.06 1936.95 0.015337 879 39.34 30.56 1.03 2.07 HyatlMill 20.1 25 year 336.96 1933.30 193671 193672 1937.61 0.009690 8.54 67.37 39J4 0.86 1.77 HyatlMill 20.1 50 year 423.99 1933.30 1937.03 1937.03 1938.04 0.009992 9.27 80.30 4076 0.89 2.01 HyatlMill 20.1 100 year 517.93 1933.30 1937.16 1937.34 1938.50 0.012699 10.71 85.62 41.17 1.01 2.66 HyatlMill 20.1 Bankfull 39.00 1933.30 1934.67 1934.42 1934.89 0.008231 379 10.60 13J6 0.66 0.50 HyatlMill 20 2 year 91.27 1932.24 1935.32 1934.51 1935.52 0.003064 3.67 32.36 29.26 0.44 0.37 HyatlMill 20 10 year 234.47 1932.24 1936.13 1935.67 1936.62 0.005494 6.09 60J5 38.48 0.63 0.92 HyatlMill 20 25 year 336.96 1932.24 1936.48 1936.14 1937.20 0.007161 7.51 75.35 42.19 0.73 1.35 HyatlMill 20 50 year 423.99 1932.24 1936.80 1936.57 1937.63 0.007659 8.25 88.85 43.33 0.77 1.58 HyatlMill 20 100 year 517.93 1932.24 1937.13 1936.90 1938.06 0.007854 8.87 103.49 44.53 079 1.77 HyatlMill 20 Bankfull 39.00 1932.24 193471 1933.80 193479 0.001989 2.35 17.56 19.01 0.34 0.17 HyatlMill 19.1 2 year 91.27 1933.20 1934.95 1934.95 1935.43 0.012697 5.80 21.67 29.84 0.87 1.06 HyatlMill 19.1 10 year 234.47 1933.20 1935.81 1935.81 1936.50 0.011640 7.64 52.98 40.05 0.90 1.57 HyatlMill 19.1 25 year 336.96 1933.20 1936.28 193628 1937.08 0.011023 8.45 74.15 45.90 0.90 1.80 HyatlMill 19.1 50 year 423.99 1933.20 1936.40 1936.56 1937.50 0.014501 9.98 79.66 46.34 1.04 2.47 HyatlMill 19.1 100 year 517.93 193320 1936.60 1936.84 1937.90 0.016189 11.03 88.98 47.06 1.11 2.95 HyatlMill 19.1 Bankfull 39.00 1933.20 1934.31 1934.31 193471 0.020651 5.06 770 976 1.00 0.97 HyatlMill 18.1 2 year 91.27 1932.30 193372 1934.14 1934.80 0.037828 8.36 11.68 18.49 1.43 2.41 HyatlMill 18.1 10 year 234.47 1932.30 1934.43 1935.01 1935.94 0.031474 10J4 34.05 39.07 1.42 3.34 HyatlMill 18.1 25 year 336.96 1932.30 193473 1935.34 1936.51 0.032808 12.14 45J9 40.57 1.49 4.06 HyatlMill 18.1 50 year 423.99 1932.30 1935.01 1935.58 1936.89 0.030568 1276 59.28 49.06 1.46 4.30 HyatlMill 18.1 100 year 517.93 1932.30 1935.21 1935.84 1937.25 0.031367 13.63 68.92 4976 1.50 4.78 HyatlMill 18.1 Bankfull 39.00 1932.30 1933.63 1933.41 1933.87 0.009299 3.91 10.21 15.01 0.70 0.54 HyatlMill 18 2year 91.27 1931.25 1934.32 1933.51 1934.48 0.002742 3.46 39.97 45.41 042 0.33 HyatlMill 18 10 year 234.47 1931.25 1934.90 1934.65 1935.30 0.005721 5.87 68.88 50.92 0.63 0.88 HyatlMill 18 25 year 336.96 1931.25 1935.36 1935A2 1935.81 0.005581 6.46 93.03 52.56 0.64 1.01 HyatlMill 18 50 year 423.99 193125 1935.68 193527 1936.18 0.005702 6.96 109.93 53.67 0.66 1.14 HyatlMill 18 100 year 517.93 1931.25 1935.98 1935.51 1936.54 0.005866 7.46 126.27 54.73 0.68 127 HyatlMill 18 Bankfull 39.00 1931.25 193370 1932.81 193378 0.002038 2.36 18.00 2426 0.34 0.17 HyatlMill 17 2 year 91.27 1932.20 1933.94 1933.94 1934.40 0.012459 574 23.86 40.59 0.86 1.04 HyatlMill 17 10 year 234.47 1932.20 1934.68 1934.68 1935.22 0.011032 7.16 60.98 52.14 0.86 1.40 HyatlMill 17 25 year 336.96 1932.20 1935.32 1934.99 193575 0.006791 6.71 95.51 54.40 0.71 1.13 HyatlMill 17 50 year 423.99 1932.20 1935.65 193522 1936.12 0.006622 7.13 113.51 55.55 0.71 123 HyatlMill 17 100 year 517.93 1932.20 1935.96 1935.46 1936.47 0.006614 7.59 130.73 56.62 0.72 1.35 HyatlMill 17 Bankfull 39.00 1932.20 1933.31 1933.31 193371 0.020492 5.07 770 9.67 1.00 0.97 HyatlMill 16.1 2 year 91.27 1931.60 1933.52 1933.40 1933.92 0.009066 5.30 24.86 35.77 0.74 0.85 HyatlMill 16.1 10 year 234.47 1931.60 1934.16 193428 1934.98 0.013564 8.15 49.99 40.34 0.96 1.79 HyatlMill 16.1 25 year 336.96 1931.60 1934.84 1934.84 1935.57 0.009350 8.09 8176 54.48 0.84 1.61 HyatlMill 16.1 50 year 423.99 1931.60 1935.09 1935.09 1935.93 0.010072 8.87 95.47 55.36 0.88 1.89 HyatlMill 16.1 100 year 517.93 1931.60 1935.36 1935.36 1936.28 0.010276 9.47 110.63 56.33 0.90 2.09 HyatlMill 16.1 Bankfull 39.00 1931.60 1932.95 1932.71 1933.18 0.008681 3.85 10.45 15.01 0.68 0.52 HyatlMill 16 2 year 91.27 1930.55 1933.61 1932.81 1933.80 0.002977 3.59 36.91 37J8 0.44 0.36 HyatlMill 16 10 year 234.47 1930.55 1934.33 1933.96 193479 0.005731 6.06 64.86 40.62 0.64 0.93 HyatlMill 16 25 year 336.96 1930.55 1934.50 1934.40 1935.35 0.009792 8.24 72.50 53.89 0.84 1.68 HyatlMill 16 50 year 423.99 1930.55 1935.08 1934.86 193576 0.006767 772 104.60 55.94 0.72 1.39 HyatlMill 16 100 year 517.93 1930.55 1935.30 1935.14 1936.11 0.007687 8.56 116.90 56J0 0.78 1.67 HyatlMill 16 Bankfull 39.00 1930.55 1933.01 1932.11 1933.09 0.002022 2.36 17J0 21.04 0.34 0.17 HEGRAS Plan: PR River HyattMill Reach: HyattMill (Continued) Reach River Sta Profile Q Total Min Ch EI W.S. Elev Crit W.S. E.G. Elev E.G. Slope Vel Chnl Flow Area Top Width Froude # Chl Shear Chan (cfs) (�) (h) (K) (K) (ft/ft) (ft/s) (59 h) (K) Ob/sq fl) HyatlMill 15 2 year 91.27 1931.50 1933.31 1933.31 193372 0.010402 5.42 26.23 4025 079 0.91 HyatlMill 15 10 year 234.47 193L50 1934.04 1934.04 1934.68 0.011775 7.53 56.40 43.09 0.90 1.54 HyatlMill 15 25 year 336.96 1931.50 1934.40 1934.40 1935.21 0.012656 8.66 72.39 44.47 0.95 1.93 HyatlMill 15 50 year 423.99 1931.50 1934.87 1934.87 1935.66 0.010385 8.77 97.88 57.33 0.89 1.87 HyatlMill 15 100 year 517.93 1931.50 1935.12 1935.12 1935.99 0.010801 9.43 112.18 58.19 0.92 2.11 HyatlMill 15 Bankfull 39.00 1931.50 1932.61 1932.61 1933.01 0.020557 5.07 770 9.71 1.00 0.97 HyatlMill 14.1 2 year 91.27 1930.90 1932.37 1932.70 1933.34 0.032143 7.96 12.62 21.06 1.33 2.14 HyatlMill 14.1 10 year 234.47 1930.90 1933.13 1933.57 1934.34 0.024270 979 40.54 46.99 126 2.73 HyatlMill 14.1 25 year 336.96 1930.90 1934.04 1933.89 1934.57 0.007926 7.26 88.82 56.42 077 1.32 HyatlMill 14.1 50 year 423.99 1930.90 1934.32 1934.10 1934.90 0.008004 778 104.96 57.42 0.78 1.47 HyatlMill 14.1 100 year 517.93 1930.90 1934.60 1934.34 1935.23 0.008071 8.28 121.02 58.39 0.80 1.61 HyatlMill 14.1 Bankfull 39.00 1930.90 193231 1932.01 1932.51 0.007060 3.60 11.51 18.37 OB2 0.45 HyatlMill 14 2 year 91.27 1929.85 1932.81 1932.13 1932.99 0.003217 3.62 38.10 44.65 0.45 0.37 HyatlMill 14 10 year 234.47 1929.85 1933.52 1933.18 1933.89 0.005252 5.65 70.50 47.47 0.61 0.82 HyatlMill 14 25 year 336.96 1929.85 1933.89 1933.54 1934.37 0.006054 6.61 88.55 48.98 0.67 1.07 HyatlMill 14 50 year 423.99 1929.85 1934.01 1933.81 193474 0.008758 8.17 94.84 57.07 0.81 1.61 HyatlMill 14 100 year 517.93 1929.85 1934.33 1933.96 1935.08 0.008359 8.49 112.94 58.18 0.80 1.69 HyatlMill 14 Bankfull 39.00 1929.85 1932.33 1931.41 1932.41 0.001887 2.30 19.04 27.80 0.33 0.16 HyatlMill 13 2 year 91.27 1930.80 1932.54 1932.54 1932.89 0.010652 5.26 29.15 47.33 0.79 0.87 HyatlMill 13 10 year 234.47 1930.80 1933.16 1933.16 193372 0.012525 7.31 59.36 49.83 0.91 1.49 HyatlMill 13 25 year 336.96 1930.80 1933.48 1933.48 1934.18 0.013411 8.36 75.65 52.23 0.97 1.86 HyatlMill 13 50 year 423.99 1930.80 1933.56 1933.82 1934.54 0.018352 10.01 80.11 57J5 1.14 2.63 HyatlMill 13 100 year 517.93 1930.80 1933.90 1934A2 1934.89 0.016130 10.25 99.90 58.96 1.09 2.64 HyatlMill 13 Bankfull 39.00 1930.80 1931.91 1931.91 1932.31 0.020664 5.04 7.73 9.87 1.00 0.97 HyatlMill 12.1 2 year 91.27 1930.20 1932.11 1932.01 1932.47 0.008445 5.07 28.84 47.00 0.72 0.78 HyatlMill 12.1 10 year 234.47 193020 1932.91 1932.78 1933.41 0.008494 670 6774 50.35 0.77 1.19 HyatlMill 12.1 25 year 336.96 1930.20 1933.42 1933.13 1933.95 0.007529 7.19 93.73 52.38 0.75 128 HyatlMill 12.1 50 year 423.99 1930.20 1933.63 1933.38 1934.29 0.008823 8.16 104.82 53.23 0.82 1.61 HyatlMill 12.1 100 year 517.93 1930.20 1933.86 1933.65 1934.65 0.009635 8.97 117.9 54.18 0.87 1.90 HyatlMill 12.1 Bankfull 39.00 1930.20 1931.59 1931.32 1931.80 0.007668 3.66 11.29 19.29 0.64 0.47 HyatlMill 12 2 year 91.27 1929.15 1932.17 1931.44 1932.34 0.002982 3.55 42.13 46J5 0.44 0.35 HyatlMill 12 10 year 234.47 1929.15 1932.89 1932.50 1933.28 0.005201 5.73 77.05 49.66 0.61 0.83 HyatlMill 12 25 year 336.96 1929.15 1933.37 1932.90 1933.84 0.005416 6.50 101.32 51.57 0.64 1.02 HyatlMill 12 50 year 423.99 1929.15 1933.55 1933.18 1934.17 0.006844 7.57 110.58 52.62 0.72 1.35 HyatlMill 12 100 year 517.93 1929.15 193375 1933.47 1934.52 0.008032 8.52 121.30 53.83 079 1.68 HyatlMill 12 Bankfull 39.00 1929.15 1931.62 1930.71 193170 0.001941 2.33 19.27 29.26 0.33 0.17 HyatlMill 11 2 year 91.27 1930.10 1931.87 1931.87 1932.25 0.010684 5.36 29.21 46.26 0.80 0.90 HyatlMill 11 10 year 234.47 1930.10 1932.54 1932.54 1933.15 0.012405 7.49 61.22 48.96 0.91 1.54 HyatlMill 11 25 year 336.96 1930.10 193277 1932.77 1933.67 0.016608 9.28 72.59 51.03 1.08 229 HyatlMill 11 50 year 423.99 1930.10 1933.18 1933.18 1934.02 0.013089 9.20 94.97 54.83 0.98 2.13 HyatlMill 11 100 year 517.93 1930.10 1933.45 1933.45 1934.36 0.013131 9.81 109.67 55.82 1.00 2.35 HyatlMill 11 Bankfull 39.00 1930.10 193121 1931.21 1931.61 0.020572 5.05 772 978 1.00 0.97 HyatlMill 10.1 2 year 91.27 192970 1931.68 1931.52 1931.92 0.006016 4.41 33.15 44.27 0.61 0.58 HyatlMill 10.1 10 year 234.47 192970 1932.43 1932.17 1932.81 0.006782 6.04 6774 48.86 0.69 0.96 HyatlMill 10.1 25 year 336.96 192970 1932.87 1932.55 1933.30 0.006560 6.65 90.56 52J8 0.70 1.10 HyatlMill 10.1 50 year 423.99 192970 1933.19 1932.80 1933.66 0.006411 7.07 107J2 53.98 0.70 120 HyatlMill 10.1 100 year 517.93 192970 1933.43 1933.03 1934.01 0.007342 7.94 120.73 59.03 0.76 1.48 HyatlMill 10.1 Bankfull 39.00 192970 1931.18 1930.81 1931.34 0.005541 3.31 1374 27.07 0.55 0.37 HyatlMill 10 2 year 91.27 192870 193170 1930.99 1931.85 0.002704 3.36 41.08 41.47 0.42 0.32 HyatlMill 10 10 year 234.47 192870 1932.39 1931.97 193273 0.004921 5.50 70.94 48.27 0.59 0.77 HyatlMill 10 25 year 336.96 192870 1932.81 1932.30 1933.23 0.005341 6.30 91.47 51.01 0.63 0.96 HyatlMill 10 50 year 423.99 192870 1933.05 1932.65 1933.58 0.006220 7.14 104.20 55.39 0.69 121 HyatlMill 10 100 year 517.93 192870 1933.29 1932.79 1933.92 0.006875 7.87 118.26 59.97 0.73 1.43 HyatlMill 10 Bankfull 39.00 192870 1931.21 193026 193L28 0.001719 2.22 21.23 36.86 0.32 0.15 HyatlMill 9 2 year 91.27 192970 1931.43 1931.43 193178 0.010612 5.27 27.23 40.23 079 0.88 HyatlMill 9 10 year 234.47 192970 1932.06 1932.06 1932.63 0.012687 7.39 53.34 42J5 0.92 1.52 HyatlMill 9 25 year 336.96 192970 1932.45 1932.45 1933.13 0.012412 8.24 71.66 48.43 0.94 1.78 HyatlMill 9 50 year 423.99 192970 1932.69 1932.69 1933.46 0.012996 8.98 83.21 49.37 0.97 2.05 HyatlMill 9 100 year 517.93 192970 1932.90 1932.90 1933.80 0.013786 974 93.97 50.23 1.01 2.35 HyatlMill 9 Bankfull 39.00 192970 1930.80 1930.80 1931.21 0.020763 5.10 7.65 9.63 1.01 0.99 HyatlMill 8.1 2 year 91.27 1929.10 1930.64 1930.92 1931.44 0.024759 7.31 15.23 29.85 1.18 1.77 HyatlMill 8.1 10 year 234.47 1929.10 1931.80 1931.61 193225 0.007987 6.50 59.97 41.47 075 1.12 HyatlMill 8.1 25 year 336.96 1929.10 193226 1931.95 1932.80 0.007794 7.25 80.46 46.93 0.76 1.31 HyatlMill 8.1 50 year 423.99 1929.10 1932.60 193224 1933.18 0.007641 7.73 96.60 49.65 0.77 1.44 HyatlMill 8.1 100 year 517.93 1929.10 1932.86 1932.57 1933.53 0.007980 8.34 110.04 50J2 0.80 1.63 HyatlMill 8.1 Bankfull 39.00 1929.10 1930.42 193020 1930.67 0.009497 3.96 10.18 16.38 070 0.55 HyatlMill 8 2 year 91.27 1928.19 1931.03 1930.42 1931.22 0.003536 3.73 35.12 38.04 0.47 0.40 HyatlMill 8 10 year 234.47 1928.19 1931.83 1931.41 1932.19 0.004956 5.57 67.08 41.27 0.59 0.79 HyatlMill 8 25 year 336.96 1928.19 1932.30 1931.79 193274 0.005250 6.36 86.92 44.32 0.63 0.98 HyatlMill 8 50 year 423.99 1928.19 1932.60 1932.08 1933.13 0.005759 7.07 100.73 47.71 0.66 1.17 HyatlMill 8 100 year 517.93 1928.19 1932.85 193229 1933.49 0.006466 7.84 112.93 50.51 0.71 1.41 HyatlMill 8 Bankfull 39.00 1928.19 1930.51 1929.67 1930.60 0.002379 2.49 16.91 24.40 0.37 020 HEGRAS Plan: PR River HyattMill Reach: HyattMill (Continued) Reach River Sta Profile Q Total Min Ch EI W.S. Elev Crit W.S. E.G. Elev E.G. Slope Vel Chnl Flow Area Top Width Froude # Chl Shear Chan (cfs) (�) (h) (K) (K) (ft/ft) (ft/s) (59 h) (K) Ob/sq fl) HyatlMill 7.5 2 year 91.27 1929.00 193075 193075 1931.12 0.010710 5.34 25.82 37.51 0.80 0.90 HyatlMill 7.5 10 year 234.47 1929.00 193174 1931.42 1932.12 0.006600 5.99 65.07 41.47 0.68 0.94 HyatlMill 7.5 25 year 336.96 1929.00 193223 1931.76 1932.67 0.006284 6.62 85.85 43.43 0.69 1.08 HyatlMill 7.5 50 year 423.99 1929.00 1932.54 1932.03 1933.04 0.006637 7.27 99.09 44.64 072 126 HyatlMill 7.5 100 year 517.93 1929.00 193278 193229 1933.39 0.007382 8.05 109.94 45.60 0.77 1.51 HyatlMill 7.5 Bankfull 39.00 1929.00 1930.11 1930.11 1930.51 0.020061 5.02 7.77 974 0.99 0.96 HyatlMill 7.4 2 year 91.27 1928.50 1930.07 1930.31 1930.81 0.022377 7.05 16.30 32.51 1.12 1.63 HyatlMill 7 4 10 year 234.47 1928.50 193177 1931.00 1931.99 0.003175 474 83.21 42.92 0.49 0.55 HyatlMill 7 4 25 year 336.96 1928.50 193225 1931.35 1932.54 0.003492 5.50 104.28 44.84 0.53 0.71 HyatlMill 7.4 50 year 423.99 1928.50 1932.52 1931.62 1932.92 0.004331 6.45 118.01 56.16 0.59 0.95 HyatlMill 7.4 100 year 517.93 1928.50 193275 1931.90 1933.25 0.004964 7.20 131.84 60.85 0.64 1.16 HyatlMill 7.4 Bankfull 39.00 1928.50 1929.86 1929.60 1930.08 0.008216 378 10.91 19.28 0.66 0.50 HyatlMill 7.3 2year 91.27 1927.45 1930.38 192974 1930.56 0.003221 3.58 37.14 38.12 045 0.36 HyatlMill 7.3 10 year 234.47 1927.45 193177 1930.71 1931.95 0.002051 4.08 93.77 43.66 0.39 0.40 HyatlMill 7.3 25 year 336.96 1927.45 193224 1931.09 1932.49 0.002535 4.95 117.54 56.45 0.45 0.56 HyatlMill 7.3 50 year 423.99 1927.45 1932.54 1931.37 1932.85 0.002899 5.56 135.33 62.99 0.48 0.69 HyatlMill 7.3 100 year 517.93 1927.45 193278 1931.65 1933.16 0.003365 6.23 151.47 68.81 0.53 0.85 HyatlMill 7.3 Bankfull 39.00 1927.45 1929.91 1929.01 1930.00 0.001948 2.32 19.63 34.80 0.33 0.17 HyatlMill 7.2 2 year 91.27 1928.40 1930.12 1930.12 1930.47 0.010794 5.27 26.88 38.80 0.79 0.88 HyatlMill 7.2 10 year 234.47 1928.40 193175 193074 1931.92 0.002373 4.17 95.59 45.34 0.42 0.42 HyatlMill 7.2 25 year 336.96 1928.40 193220 1931.09 1932.46 0.003091 5.23 118.54 59.90 0.50 0.64 HyatlMill 7.2 50 year 423.99 1928.40 1932.45 1931.34 1932.80 0.003945 6.19 134.80 72.68 0.57 0.87 HyatlMill 7.2 100 year 517.93 1928.40 1932.67 1931.60 1933.11 0.004630 6.97 152.25 83.9 OB2 1.08 HyatlMill 7.2 Bankfull 39.00 1928.40 1929.51 1929.51 1929.91 0.020717 5.07 7.69 972 1.01 0.98 HyatlMill 7.1 2 year 91.27 1928.00 1929.57 1929.77 1930.23 0.020720 678 18.43 37.26 1.08 1.51 HyatlMill 7.1 10 year 234.47 1928.00 193174 1930.43 1931.88 0.001633 376 112.20 60J6 0.36 0.33 HyatlMill 7.1 25 year 336.96 1928.00 193220 1930.77 1932.41 0.002192 474 143.82 76.05 0.43 0.50 HyatlMill 7.1 50 year 423.99 1928.00 1932.46 1931.04 193273 0.002739 5.53 164.59 94.45 0.48 0.67 HyatlMill 7.1 100 year 517.93 1928.00 1932.71 1931.18 1933.02 0.003005 6.02 189.12 102.40 0.51 0.78 HyatlMill 7.1 Bankfull 39.00 1928.00 1929.35 1929.11 1929.57 0.008727 3.84 10.97 23.89 0.68 0.52 HyatlMill 7 2year 91.27 1926.95 1929.85 1929.39 1930.02 0.003287 3.58 37.57 38.04 045 0.37 HyatlMill 7 10 year 234.47 1926.95 193173 1930.18 1931.86 0.001304 3.54 122.20 64.67 0.32 029 HyatlMill 7 25 year 336.96 1926.95 1932.19 1930.54 1932.38 0.001689 4.35 156.58 85.81 0.37 0.42 HyatlMill 7 50 year 423.99 1926.95 1932.47 1930.81 1932.69 0.001966 4.90 181.32 95.28 0 40 0.51 HyatlMill 7 100 year 517.93 1926.95 193271 1931.04 1932.98 0.002243 5.41 205J2 103.63 0.44 0.62 HyatlMill 7 Bankfull 39.00 1926.95 1929.41 1928.49 1929.49 0.001871 2.27 21.29 3629 0.33 0.16 HyatlMill 6 2 year 91.27 1927.90 1929.58 1929.58 1929.94 0.011529 5.36 26.44 37.29 0.82 0.92 HyatlMill 6 10 year 234.47 1927.90 193171 193021 1931.84 0.001606 378 131.15 85.56 0.36 0.33 HyatlMill 6 25 year 336.96 1927.90 193220 1930.57 1932.35 0.001683 4.22 176.19 99.00 0.37 0.40 HyatlMill 6 50 year 423.99 1927.90 1932.48 1930.81 1932.65 0.001833 4.62 205.14 10426 0.40 0.46 HyatlMill 6 100 year 517.93 1927.90 193273 1931.12 1932.93 0.002105 5.14 232.16 11578 0.43 0.56 HyatlMill 6 Bankfull 39.00 1927.90 1929.00 1929.00 1929.41 0.020879 5.11 7.64 9.61 1.01 0.99 HyatlMill 5.5 Culvert HyatlMill 4.1 2 year 91.27 1925.80 1927.65 1927.65 1928.05 0.009760 5.35 24.28 36.09 0.77 0.88 HyatlMill 4.1 10 year 234.47 1925.80 1928.37 1928.37 1929.00 0.011203 7.42 51.10 38.98 0.88 1.48 HyatlMill 4.1 25 year 336.96 1925.80 192873 1928.73 1929.51 0.012042 8.50 65.37 40.43 0.93 1.85 HyatlMill 4.1 50 year 423.99 1925.80 1929.00 1929.00 1929.89 0.012411 9.23 76.56 41.53 0.96 2.11 HyatlMill 4.1 100 year 517.93 1925.80 1929.28 192928 1930.27 0.012514 9.86 88.29 42.65 0.98 2.34 HyatlMill 4.1 Bankfull 39.00 1925.80 1927.15 1926.90 1927.38 0.008693 3.85 10.45 15.68 0.68 0.52 HyatlMill 4 2 year 91.27 192475 1927.68 1927.03 1927.87 0.003338 3.65 35.95 38.33 0.46 0.38 HyatlMill 4 10 year 234.47 192475 1928.34 1928.05 192876 0.006100 5.97 61.82 40.98 0.65 0.92 HyatlMill 4 25 year 336.96 1924.75 1928.62 1928.42 1929.23 0.008001 7.32 73J0 42.15 0.76 1.34 HyatlMill 4 50 year 423.99 192475 1928.88 1928.71 1929.61 0.008757 8.11 8474 4320 0.80 1.59 HyatlMill 4 100 year 517.93 192475 1929.08 1928.97 1929.97 0.010034 9.05 93.53 44A2 0.87 1.94 HyatlMill 4 Bankfull 39.00 192475 192720 1926.31 1927.29 0.002005 2.34 18.60 27.88 0.34 0.17 HyatlMill 3 2 year 91.27 192570 1927.44 1927.44 192779 0.010408 5.22 2722 4024 0.78 0.86 HyatlMill 3 10 year 234.47 192570 1928.06 1928.06 1928.65 0.012630 7.38 53.16 42J9 0.92 1.52 HyatlMill 3 25 year 336.96 192570 1928.40 1928.40 1929.12 0.013342 8.41 67.80 44.16 0.97 1.87 HyatlMill 3 50 year 423.99 192570 1928.65 1928.65 1929.47 0.013803 9.14 78.91 45.17 1.00 2.14 HyatlMill 3 100 year 517.93 192570 1928.89 1928.89 1929.82 0.014287 9.87 89.80 46.14 1.03 2.42 HyatlMill 3 Bankfull 39.00 192570 1926.81 1926.81 1927.21 0.020299 5.03 775 979 1.00 0.96 HyatlMill 2.1 2 year 91.27 1925.20 192674 1927.00 1927.51 0.024159 7.19 16.18 35.25 1.16 1.72 HyatlMill 2.1 10 year 234.47 1925.20 1927.37 1927.65 1928.36 0.022578 9.22 41 J4 42.35 121 2.45 HyatlMill 2.1 25 year 336.96 1925.20 1927.69 1927.99 1928.82 0.022587 10.25 55.23 43.62 124 2.87 HyatlMill 2.1 50 year 423.99 1925.20 1927.92 192825 1929.17 0.022604 10.99 65.47 44.56 126 3.19 HyatlMill 2.1 100 year 517.93 1925.20 1928.15 1928.48 1929.52 0.022505 11.67 75.85 45.50 128 3.48 HyatlMill 2.1 Bankfull 39.00 1925.20 1926.16 1926.31 192675 0.036328 6.19 6.30 9.04 1.31 1.52 HyatlMill 2 2 year 91.27 1924.17 1926.86 1926.61 1927.12 0.005611 4.32 29.89 41.34 0.58 0.55 HyatlMill 2 10 year 234.47 1924.17 1927.50 1927.40 1928.01 0.008519 6.58 57.28 43.95 0.76 1.16 HyatlMill 2 25 year 336.96 1924.17 1927.86 1927.74 1928.49 0.009250 7.54 73.46 45.43 0.81 1.45 HyatlMill 2 50 year 423.99 1924.17 1928.13 1928.01 1928.84 0.009682 8.21 85J6 46.52 0.84 1.67 HyatlMill 2 100 year 517.93 1924.17 1928.39 192825 1929.20 0.009996 8.83 98.21 47.59 0.86 1.87 HEC-RAS Plan: PR River: HyattMill Reach: HyattMill Reach River Sta Profile E.G. Elev W.S. Elev Vel Head Frctn Loss C& E Loss Q Left Q Channel Q Right Top Width (ft) (n) (n) (n) (n) (�rs� ��rs� ��rs) (n) HyattMill 23 2year 1936.45 1935.98I 0.47 0.13 0.06 073 8370�, 6.84 27.41 HyattMill 23 10 year 1937.57 1936.83 0.74 0.13 0.08 7.53 179.23 47.70 33.85 HyattMill 23 25 year 1938.16 1937.28 0.88 0.13 0.09 15.55 240.60 80.80 37.17 HyattMill 23 50 year 1938.61 1937.74 0.87 0.13 0.05 26.42 285.40 112.17 39.22 HyattMill 23 100 year 1939.05 1938.10 0.95 0.14 0.01 37.83 335.71 144.40 40.52 HyattMill 23 Bankfull 1935.69 1935.29 0.40 0.17 0.07 39.00 9.67 HyattMill 22.1 2 year 1936.12 1935.84 0.28 0.04 0.03 1.34 80.72 9.21 27.58 HyattMill 22.1 10 year 1937.31 1936.83 0.48 0.05 0.03 9.61 176.28 48.58 34.23 HyattMill 22.1 25 year 1937.95 1937.35 0.60 0.06 0.03 18.48 238.67 79.81 37.60 HyattMill 22.1 50 year 1938.44 1937.73 0.71 0.06 0.03 28.83 294.28 100.89 43.62 HyattMill 22.1 100 year 1938.90 1937.99 0.91 0.07 0.07 39.70 357.43 120.80 47.78 HyattMill 22.1 Bankfull 1935.35 1935.17 0.18 0.04 0.03 0.05 38.64 0.31 16.38 HyattMill 22 2 year 1936.04 1935.88 0.17 0.05 0.03 0.99 82.89 7.40 27.73 HyattMill 22 10 year 1937.23 1936.86� 0.37 0.06 0.03 8.46 187.91 38.10 35.12 HyattMill 22 25 year 1937.86 1937.37 0.48 0.06 0.04 17.81 255.52 63.63 43.37 HyattMill 22 50 year 1938.35 1937.75 0.60 0.07 0.03 27.43 316.45 80.10 45.74 HyattMill 22 100 year 1938.76 1938.08 0.68 0.06 0.02 37.33 370.49 110.11 46.91 HyattMill 22 Bankfull 1935.28 1935.20 0.08 0.04 0.03 0.03 38.70 0.27 18.94 HyattMill 21 2 year 1935.96 1935.48 0.49 0.11 0.02 1.43 84.05 5.79 26.19 HyattMill 21 10 year 1937.14 1936.48 0.67 0.07 0.01 14.96 180.58 38.93 33.49 HyattMill 21 25 year 1937.75 1936.84 0.91 0.08 0.00 27.01 247.54 62.41 37.70 HyattMill 21 50 year 1938.25 1937.30 0.94 0.08 0.02 42.19 299.93 81.87 43.11 HyattMill 21 100 year 1938.68 1937.81 0.87 0.06 0.03 57.90 341.62 118.41 44.78 HyattMill 21 Bankfull 1935.21 1934.82 0.39 0.17 0.01 39.00 9.75 HyattMill 20.1 2 year 1935.65 1935.23 0.42 0.02 0.02 1.83 85.73 3.71 22.77 HyattMill 20.1 10 year 1936.95 1935.91 1.04 0.04 0.05 12.75 200.54 21.18 30.56 HyattMill 20.1 25 year 1937.61 1936.71 0.90 0.03 0.04 36.08 262.93 37.95 39.74 HyattMill 20.1 50 year 1938.04 1937.03 1.02 0.03 0.02 52.19 315.30 56.50 40.76 HyattMill 20.1 100 year 1938.50 1937.16 1.34 0.03 0.04 66.65 378.49 72.79 41.17 HyattMill 20.1 Bankfull 1934.89 1934.67 0.22 0.02 0.01 0.04 38.89 0.06 13.76 HyattMill 20 2 year 1935.52 1935.32 0.20 0.02 0.01 2.52 85.31 3.43 29.26 HyattMill 20 10 year 1936.62 1936.13 0.49 0.04 0.01 21.44 196.22 16.81 38.48 HyattMill 20 25 year 1937.20 1936.48 0.71 0.04 0.01 39.79 270.82 26.35 42.19 HyattMill 20 50 year 1937.63 1936.80 0.83 0.05 0.01 57.98 326.50 39.51 43.33 HyattMill 20 100 year 1938.06 1937.13 0.93 0.05 0.02 79.34 383.37 55.23 44.53 HyattMill 20 Bankfull 1934.79 1934.71 0.09 0.01 0.00 0.08 38.77 0.15 19.01 HyattMill 19.1 2 year 1935.43 1934.95 0.48 0.56 0.06 2.83 82.60 5.84 29.84 HyattMill 19.1 10 year 1936.50 1935.81 0.70 0.48 0.08 28.38 175.32 30.77 40.05 HyattMill 19.1 25 year 1937.08 1936.28 0.80 0.46 0.10 53.58 234.96 48.41 45.90 HyattMill 19.1 50 year 1937.50 1936.40 1.09 0.53 0.08 70.17 289.43 64.40 46.34 HyattMill 19.1 100 year 1937.90 1936.60 1.30 0.57 0.07 90.65 342.33 84.96 47.06 HyattMill 19.1 Bankfull 1934.71 1934.31 0.40 0.37 0.05 39.00 9.76 HyattMill 18.1 2 year 1934.80 1933.72 1.08 0.04 0.06 0.15 90.54 0.58 18.49 HyattMill 18.1 10 year 1935.94 1934.43 1.50 0.07 0.05 6.61 194.41 33.45 39.07 HyattMill 18.1 25 year 1936.51 1934.73 1.79 0.07 0.08 14.82 256.00 66.13 40.57 HyattMill 18.1 50 year 1936.89 1935.01 1.87 0.07 0.09 24.33 305.60 94.06 49.06 HyattMill 18.1 100 year 1937.25 1935.21 2.05 0.08 0.10 32.99 353.45 131.49 49.76 HyattMill 18.1 Bankfull 1933.87 1933.63 0.24 0.04 0.05 0.02 38.92 0.06 15.01 HyattMill 18 2 year 1934.48 1934.32 0.16 0.05 0.03 2.20 79.99 9.08 45.41 HyattMill 18 10 year 1935.30 1934.90 0.41 0.07 0.01 10.79 173.39 50.29 50.92 HyattMill 18 25 year 1935.81 1935.36 0.45 0.06 0.01 19.39 223.75 93.81 52.56 HyattMill 18 50 year 1936.18 1935.68 0.50 0.06 0.01 26.96 265.54 131.49 53.67 HyattMill 18 100 year 1936.54 1935.98 0.56 0.06 0.01 35.44 309.48 173.02 54.73 HyattMill 18 Bankfull 1933.78 1933.70 0.09 0.05 0.03 0.06 38.60 0.33 2426 HyattMill 17 2 year 1934.40 1933.94 0.46 0.20 0.02 2.26 80.69 8.32 40.59 HyattMill 17 10 year 1935.22 1934.68 0.55 0.23 0.03 17.58 153.43� 63.45 52.14 HyattMill 17 25 year 1935.75 1935.32 0.43 0.15 0.03 31.82 187.40 117.74 54.40 HyattMill 17 50 year 1936.12 1935.65 0.46 0.15 0.04 42.76 222.77 158.46 55.55 HyattMill 17 100 year 1936.47 1935.96 0.51 0.15 0.04 54.79 260.50 202.64 56.62 HEC-RAS Plan: PR River: HyattMill Reach: HyattMill (Continued) Reach River Sta Profile E.G. Elev W.S. Elev Vel Head Frctn Loss C& E Loss Q Left Q Channel Q Right Top Width (ft) (n) (n) (n) (n) (�rs� ��rs� ��rs) (n) HyattMill 17 Bankfull 1933.71 1933.31 0.40 0.24 0.05 39.00�- 9.67 HyattMill 16.1 2 year 1933.92 1933.52 0.40 0.06 0.07 4.20 83.71 3.36 35.77 HyattMill 16.1 10 year 1934.98 1934.16 0.81 0.09 0.07 30.11 181.73 22.63 40.34 HyattMill 16.1 25 year 1935.57 1934.84 0.73 0.11 0.01 61.59 235.83 39.54 54.48 HyattMill 16.1 50 year 1935.93 1935.09 0.84 0.09 0.05 81.22 280.87 61.89 55.36 HyattMill 16.1 100 year 193628 1935.36 0.91 0.10 0.03 103.02 325.65 8927 56.33 HyattMill 16.1 Bankfull 1933.18 1932.95 0.23 0.04 0.04 0.05 38.91 0.05 15.01 HyattMill 16 2 year 1933.80 1933.61 0.18 0.06 0.02 5.33 83.13 2.81 37.78 HyattMill 16 10 year 1934.79 1934.33 0.46 0.09 0.02 31.50 187.96 15.01 40.62 HyattMill 16 25 year 1935.35 1934.50 0.86 0.12 0.02 51.23 271.07 14.66 53.89 HyattMill 16 50 year 1935.76 1935.08 0.68 0.09 0.01 76.74 303.77 43.48 55.94 HyattMill 16 100 year 1936.11 1935.30 0.81 0.10 0.01 97.63 357.49 62.80 56.70 HyattMill 16 Bankfull 1933.09 1933.01 0.09 0.05 0.03 0.16 38.76 0.08 21.04 HyattMill 15 2 year 1933.72 1933.31 0.40 0.32 0.06 5.31 80.17 5.79 40.25 HyattMill 15 10 year 1934.68 1934.04 0.65 0.30 0.06 34.62 166.57 33.28 43.09 HyattMill 15 25 year 193521 1934.40 0.81 0.18 0.08 5829 223.30 55.36 44.47 HyattMill 15 50 year 1935.66 1934.87 0.79 0.16 0.06 84.62 267.86 71.52 57.33 HyattMill 15 100 year 1935.99 1935.12 0.87 0.17 0.07 105.99 311.50 100.45 58.19 HyattMill 15 Bankfull 1933.01 1932.61 0.40 0.21 0.06 39.00 9.71 HyattMill 14.1 2 year 1933.34 1932.37 0.97 0.06 0.05 029 90.15 0.83 21.06 HyattMill 14.1 10 year 1934.34 1933.13 1.20 0.07 0.01 10.00 186.68 37.78 46.99 HyattMill 14.1 25 year 1934.57 1934.04 0.53 0.07 0.01 26.74 204.83 105.40 56.42 HyattMill 14.1 50 year 1934.90 1934.32 0.58 0.07 0.01 36.13 241.89 145.96 57.42 HyattMill 14.1 100 year 1935.23 1934.60 0.63 0.07 0.01 46.57 280.55 190.81 58.39 HyattMill 14.1 Bankfull 1932.51 1932.31 0.20 0.04 0.02 0.07 38.75 0.18 18.37 HyattMill 14 2 year 1932.99 1932.81 0.18 0.03 0.00 1.81 79.46 10.00 44.65 HyattMill 14 10 year 1933.89 1933.52 0.37 0.05 0.01 10.66 167.91 55.90 47.47 HyattMill 14 25 year 1934.37 1933.89 0.48 0.06 0.02 18.41 223.84 94.71 48.98 HyattMill 14 50 year 1934.74 1934.01 0.73 0.08 0.01 25.27 287.36 111.36 57.07 HyattMill 14 100 year 1935.08 1934.33 0.75 0.07 0.01 33.39 328.22 156.32 58.18 HyattMill 14 Bankfull 1932.41 1932.33 0.08 0.02 0.00 0.10 38.42 0.49 27.80 HyattMill 13 2 year 1932.89 1932.54 0.35 0.17 0.00 4.86 74.61 11.80 47.33 HyattMill 13 10 year 1933.72 1933.16 0.56 0.18 0.02 2522 150.86 58.40 49.83 HyattMill 13 25 year 1934.18 1933.48 0.70 0.17 0.05 41.44 200.45 95.06 52.23 HyattMill 13 50 year 1934.54 1933.56 0.98 0.17 0.02 53.43 248.05 122.51 57.75 HyattMill 13 100 year 1934.89 1933.90 0.99 0.19 0.02 71.99 289.97 155.97 58.96 HyattMill 13 Bankfull 1932.31 1931.91 0.40 0.22 0.06 39.00 9.87 HyattMill 12.1 2 year 1932.47 1932.11 0.36 0.07 0.06 6.08 81.17 4.01 47.00 HyattMill 12.1 10 year 1933.41 1932.91 0.50 0.09 0.03 45.57 162.93 25.97 50.35 HyattMill 12.1 25 year 1933.95 1933.42 0.53 0.09 0.02 79.49 212.49 44.99 52.38 HyattMill 12.1 50 year 1934.29 1933.63 0.67 0.11 0.01 105.33 258.99 59.67 5323 HyattMill 12.1 100 year 1934.65 1933.86 0.78 0.12 0.00 134.83 306.52 76.57 54.18 HyattMill 12.1 Bankfull 1931.80 1931.59 0.21 0.05 0.04 0.10 38.79 0.11 19.29 HyattMill 12 2 year 1932.34 1932.17 0.17 0.08 0.02 9.42 80.05 1.81 46.75 HyattMill 12 10 year 1933.28 1932.89 0.39 0.11 0.02 49.69 174.93 9.85 49.66 HyattMill 12 25 year 1933.84 1933.37 0.47 0.13 0.04 86.31 232.75 17.90 51.57 HyattMill 12 50 year 1934.17 1933.55 0.62 0.13 0.02 114.03 285.89 24.07 52.62 HyattMill 12 100 year 1934.52 1933.75 0.77 0.15 0.01 145.86 340.58 31.49 53.83 HyattMill 12 Bankfull 1931.70 1931.62 0.08 0.07 0.03 0.46 38.47 0.07 29.26 HyattMill 11 2 year 193225 1931.87 0.38 0.11 0.04 9.60 77.15 4.51 4626 HyattMill 11 10 year 1933.15 1932.54 0.61 0.11 0.07 51.81 159.26 23.40 48.96 HyattMill 11 25 year 1933.67 1932.77 0.90 0.13 0.14 82.49 219.13 35.34 51.03 HyattMill 11 50 year 1934.02 1933.18 0.83 0.11 0.11 116.13 256.25 51.61 54.83 HyattMill 11 100 year 1934.36 1933.45 0.92 0.12 0.10 147.97 299.72 70.24 55.82 HyattMill 11 Bankfull 1931.61 1931.21 0.40 0.13 0.07 39.00 9.78 HyattMill 10.1 2 year 1931.92 1931.68 0.25 0.05 0.03 9.04 73.11 9.12 4427 HyattMill 10.1 10 year 1932.81 1932.43 0.38 0.07 0.01 47.57 146.73 40.16 48.86 HyattMill 10.1 25 year 1933.30 1932.87 0.43 0.07 0.00 78.64 191.73 66.59 52.78 HEC-RAS Plan: PR River: HyattMill Reach: HyattMill (Continued) Reach River Sta Profile E.G. Elev W.S. Elev Vel Head Frctn Loss C& E Loss Q Left Q Channel Q Right Top Width (ft) (n) (n) (n) (n) (�rs� ��rs� ��rs) (n) HyattMill 10.1 50 year 1933.66 1933.19 0.46 0.07 0.01 104.85 226.99�� 92.14 53.98 HyattMill 10.1 100 year 1934.01 1933.43 0.58 0.08 0.00 122.40 273.95 121.58 59.03 HyattMill 10.1 Bankfull 1931.34 1931.18 0.17 0.03 0.03 0.52 37.99 0.49 27.07 HyattMill 10 2 year 1931.85 1931.70 0.15 0.05 0.02 5.87 75.36 10.04 41.47 HyattMill 10 10 year 1932.73 1932.39 0.34 0.08 0.02 28.60 165.26 40.60 48.27 HyattMill 10 25 year 193323 1932.81 0.42 0.08 0.03 46.11 218.41 72.44 51.01 HyattMill 10 50 year 1933.58 1933.05 0.53 0.09 0.02 57.60 266.42 99.97 55.39 HyattMill 10 100 year 1933.92 1933.29 0.63 0.09 0.03 72.44 314.63 130.86 59.97 HyattMill 10 Bankfull 1931.28 1931.21 0.07 0.04 0.03 0.38 37.80 0.83 36.86 HyattMill 9 2 year 1931.78 1931.43 0.35 0.29 0.04 6.74 73.05 11.48 40.23 HyattMill 9 10 year 1932.63 1932.06 0.58 0.18 0.04 33.70 149.08 51.70 42.75 HyattMill 9 25 year 1933.13 1932.45 0.68 0.18 0.04 57.25 198.96 80.75 48.43 HyattMill 9 50 year 1933.46 1932.69 0.78 0.18 0.06 75.77 237.87 110.35 49.37 HyattMill 9 100 year 1933.80 1932.90� 0.89 0.19 0.07 95.96 279.23 142.74 50.23 HyattMill 9 Bankfull 1931.21 1930.80 0.40 0.26 0.05 39.00 9.63 HyattMill 8.1 2 year 1931.44 1930.64 0.80 0.03 0.06 1.80 87.82 1.65 29.85 HyattMill 8.1 10 year 1932.25 1931.80 0.46 0.03 0.03 47.10 153.38 33.99 41.47 HyattMill 8.1 25 year 1932.80 1932.26 0.54 0.03 0.03 79.96 205.04 51.96 46.93 HyattMill 8.1 50 year 1933.18 1932.60 0.59 0.03 0.02 107.11 244.39 72.49 49.65 HyattMill 8.1 100 year 1933.53 1932.86 0.66 0.03 0.01 135.13 286.07 96.73 50.72 HyattMill 8.1 Bankfull 1930.67 1930.42 024 0.02 0.04 0.05 38.89 0.07 16.38 HyattMill 8 2 year 1931.22 1931.03 0.19 0.07 0.02 7.15 79.23 4.89 38.04 HyattMill 8 10 year 1932.19 1931.83 0.36 0.07 0.00 40.69 167.16 26.63 41.27 HyattMill 8 25 year 1932.74 1932.30 0.44 0.08 0.00 69.87 223.50 43.58 44.32 HyattMill 8 50 year 1933.13 1932.60 0.53 0.08 0.01 95.26 271.56 57.17 47.71 HyattMill 8 100 year 1933.49 1932.85 0.64 0.09 0.01 122.29 322.38 73.26 50.51 HyattMill 8 Bankfull 1930.60 1930.51 0.10 0.07 0.03 0.19 38.67 0.14 24.40 HyattMill 7.5 2 year 1931.12 1930.75 0.37 0.28 0.04 8.18 75.76 7.33 37.51 HyattMill 7.5 10 year 1932.12 1931.74 0.37 0.08 0.04 49.12 145.16 40.19 41.47 HyattMill 7.5 25 year 1932.67 1932.23 0.43 0.08 0.04 79.42 193.03 64.51 43.43 HyattMill 7.5 50 year 1933.04 1932.54 0.51 0.09 0.03 104.91 234.01 85.07 44.64 HyattMill 7.5 100 year 1933.39 1932.78 0.61 0.11 0.04 132.20 278.59 107.13 45.60 HyattMill 7.5 Bankfull 1930.51 1930.11 0.39 0.23 0.05 39.00 9.74 HyattMill 7.4 2 year 1930.81 1930.07 0.74 0.07 0.07 1.09 87.02 3.16 32.51 HyattMill 7.4 10 year 1931.99 1931.77 0.23 0.03 0.01 25.84 139.51 69.12 42.92 HyattMill 7.4 25 year 1932.54 1932.25 0.29 0.04 0.01 41.14 188.54 107.29 44.84 HyattMill 7.4 50 year 1932.92 1932.52 0.40 0.04 0.03 41.54 238.42 144.03 56.16 HyattMill 7.4 100 year 1933.25 1932.75 0.49 0.05 0.03 55.57 283.30 179.06 60.85 HyattMill 7.4 Bankfull 1930.08 1929.86 0.22 0.05 0.04 0.08 38.77 0.16 19.28 HyattMill 7.3 2 year 1930.56 1930.38 0.17 0.07 0.02 2.73 77.46 11.08 38.12 HyattMill 7.3 10 year 1931.95 1931.77� 0.18 0.03 0.00 17.71 150.27 66.50 43.66 HyattMill 7.3 25 year 1932.49 1932.24 0.25 0.03 0.00 23.13 207.77 106.05 56.45 HyattMill 7.3 50 year 1932.85 1932.54 0.31 0.04 0.00 34.22 251.81 137.96 62.99 HyattMill 7.3 100 year 1933.16 1932.78 0.38 0.05 0.01 48.28 298.79 170.87 68.81 HyattMill 7.3 Bankfull 1930.00 1929.91 0.08 0.06 0.03 0.17 38.16 0.67 34.80 HyattMill 7.2 2 year 1930.47 1930.12 0.35 0.21 0.03 6.16 73.06 12.06 38.80 HyattMill 7.2 10 year 1931.92 1931.75 0.17 0.03 0.01 36.49 126.81 71.17 45.34 HyattMill 7.2 25 year 1932.46 1932.20 0.26 0.04 0.02 44.62 182.81 109.53 59.90 HyattMill 7.2 50 year 1932.80 1932.45 0.35 0.05 0.02 60.25 231.64 132.10 72.68 HyattMill 7.2 100 year 1933.11 1932.67 0.44 0.05 0.04 77.41 276.46 164.05 83.57 HyattMill 7.2 Bankfull 1929.91 1929.51 0.40 0.19 0.05 39.00 9.72 HyattMill 7.1 2 year 1930.23 1929.57 0.66 0.06 0.06 4.84 83.95 2.48 37.26 HyattMill 7.1 10 year 1931.88 1931.74 0.13 0.02 0.00 65.98 129.19 39.30 60.76 HyattMill 7.1 25 year 1932.41 1932.20 0.21 0.02 0.01 81.72 184.74 70.50 76.05 HyattMill 7.1 50 year 1932.73 1932.46 028 0.02 0.01 97.54 229.84 96.61 94.45 HyattMill 7.1 100 year 1933.02 1932.71 0.31 0.03 0.01 131.42 265.59 120.92 102.40 HyattMill 7.1 Bankfull 1929.57 1929.35 0.23 0.04 0.04 0.17 38.70 0.13 23.89 HyattMill 7 2 year 1930.02 1929.85 0.17 0.06 0.02 11.66 76.09 3.52 38.04 HEC-RAS Plan: PR River: HyattMill Reach: HyattMill (Continued) Reach River Sta Profile E.G. Elev W.S. Elev Vel Head Frctn Loss C& E Loss Q Left Q Channel Q Right Top Width (ft) (n) (n) (n) (n) (�rs� ��rs� ��rs) (n) HyattMill 7 10 year 1931.86 1931.73 0.13 0.02 0.00 59.78 148.81 25.87 64.67 HyattMill 7 25 year 1932.38 1932.19 0.19 0.02 0.01 85.49 204.83 46.64 85.81 HyattMill 7 50 year 1932.69 1932.47 0.23 0.02 0.02 115.87 245.10 63.02 9528 HyattMill 7 100 year 1932.98 1932.71 027 0.03 0.02 151.73 285.66 80.55 103.63 HyattMill 7 Bankfull 1929.49 1929.41 0.08 0.05 0.03 1.30 37.40 0.30 36.29 HyattMill 6 2 year 1929.94 1929.58 0.36 16.25 71.69 3.33 3729 HyattMill 6 10 year 1931.84 1931.71 0.13 73.12 131.20 30.15 85.56 HyattMill 6 25 year 1932.35 1932.20 0.15 121.45 167.10 48.41 99.00 HyattMill 6 50 year 1932.65 1932.48 0.17 165.32 195.80 62.87 10426 HyattMill 6 100 year 1932.93 1932.73 0.20 207.67 230.46 79.80 115.78 HyattMill 6 Bankfull 1929.41 1929.00 0.41 39.00 9.61 HyattMill 5.5 Culvert HyattMill 4.1 2 year 1928.05 1927.65 0.40 0.06 0.06 8.17 81.04 2.05 36.09 HyattMill 4.1 10 year 1929.00 1928.37 0.63 0.10 0.06 55.18 165.62 13.67 38.98 HyattMill 4.1 25 year 1929.51 1928.73 0.78 0.12 0.05 93.10 220.38 23.48 40.43 HyattMill 4.1 50 year 1929.89 1929.00 0.89 0.13 0.05 126.94 264.50 32.55 41.53 HyattMill 4.1 100 year 1930.27 1929.28 0.99 0.14 0.03 164.76 310.17 43.00 42.65 HyattMill 4.1 Bankfull 1927.38 1927.15 0.23 0.04 0.04 0.08 38.88 0.04 15.68 HyattMill 4 2 year 1927.87 1927.68 0.18 0.06 0.02 8.76 79.10 3.41 38.33 HyattMill 4 10 year 1928.76 1928.34 0.42 0.09 0.02 45.00 172.44 17.03 40.98 HyattMill 4 25 year 1929.23 1928.62 0.61 0.11 0.01 74.11 234.72 28.13 42.15 HyattMill 4 50 year 1929.61 1928.88 0.72 0.12 0.01 101.95 283.13 38.92 43.20 HyattMill 4 100 year 1929.97 1929.08 0.88 0.13 0.01 131.51 335.94 50.48 44.02 HyattMill 4 Bankfull 1927.29 1927.20 0.08 0.05 0.03 0.41 38.41 0.17 27.88 HyattMill 3 2 year 1927.79 1927.44 0.35 0.24 0.04 9.99 73.76 7.52 40.24 HyattMill 3 10 year 1928.65 1928.06 0.58 0.25 0.04 47.50 151.13 35.84 42.79 HyattMill 3 25 year 1929.12 1928.40 0.72 025 0.04 77.37 201.08 58.51 44.16 HyattMill 3 50 year 1929.47 1928.65 0.82 0.26 0.04 103.61 241.88 78.50 45.17 HyattMill 3 100 year 1929.82 1928.89 0.93 0.26 0.04 132.46 284.91 100.55 46.14 HyattMill 3 Bankfull 1927.21 1926.81 0.39 0.43 0.02 39.00 9.79 HyattMill 2.1 2 year 1927.51 1926.74 0.77 0.07 0.03 1.13 86.94 3.20 35.25 HyattMill 2.1 10 year 1928.36 1927.37 0.99 0.10 0.02 17.33 170.40� 46.74 42.35 HyattMill 2.1 25 year 1928.82 1927.69 1.14 0.11 0.03 31.99 222.21 82.77 43.62 HyattMill 2.1 50 year 1929.17 1927.92 1.26 0.11 0.03 45.23 264.09 114.67 44.56 HyattMill 2.1 100 year 1929.52 1928.15 1.37 0.12 0.04 60.17 307.68 150.07 45.50 HyattMill 2.1 Bankfull 1926.75 1926.16 0.60 0.05 0.06 39.00 9.04 HyattMill 2 2 year 1927.12 1926.86 0.26 0.07 0.02 1.27 81.70 8.30 41.34 HyattMill 2 10 year 1928.01 1927.50 0.51 0.11 0.03 10.41 170.98 53.08 43.95 HyattMill 2 25 year 1928.49 1927.86 0.63 0.12 0.03 19.02 226.04 91.90 45.43 HyattMill 2 50 year 1928.84 1928.13 0.72 0.13 0.03 27.04 270.40 126.55 46.52 HyattMill 2 100 year 1929.20 1928.39 0.80 0.13 0.04 36.28 316.48 165.17 47.59 HyattMill 2 Bankfull 1926.60 1926.49 0.10 0.04 0.01 0.02 38.81 0.16 27.41 HyattMill 1 2 year 1927.02 1926.82 0.20 0.09 0.01 2.89 76.42 11.96 4328 HyattMill 1 10 year 1927.86 1927.45 0.42 0.11 0.01 14.77 161.49 58.21 45.79 HyattMill 1 25 year 1928.33 1927.81 0.52 0.11 0.02 25.24 214.39 97.33 47.25 HyattMill 1 50 year 1928.68 1928.07 0.61 0.11 0.03 34.81 257.06 132.12 48.33 HyattMill 1 100 year 1929.03 1928.34 0.68 0.11 0.03 45.72 301.38 170.84 49.41 HyattMill 1 Bankfull 1926.55 1926.47 0.08 0.06 0.01 026 37.55 1.19 41.85 HyattMill 0.1 2 year 1926.93 1926.68 0.25 11.55 64.29 15.43 45.61 HyattMill 0.1 10 year 1927.74 1927.37 0.37 45.44 129.85 59.18 48.38 HyattMill 0.1 25 year 1928.20 1927.75 0.45 71.39 173.17 92.40 49.90 HyattMill 0.1 50 year 1928.54 1928.03 0.51 93.98 208.82 121.19 51.03 HyattMill 0.1 100 year 1928.88 1928.31 0.57 118.81 246.41 152.71 52.15 HyattMill 0.1 Bankfull 1926.48 1926.29 0.19 1.40 35.54 2.06 44.05 100-Year WSEL and HEC-RAS Cross Section Map I � 1 \ � � / — / / � � — � — � � 193 _ _ � � _� ,� �� �. � -RAS CROSS SECTION � � � b obs� � � � 6-_ = —� = — �935 -- � - 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