20190210 Ver 2_Site 5 design information_A-0011C_Hyatt_Mill_Ck_Technical_Memo_02.01.19_20201113

McCORMICK
TAYLOR
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-0011C 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% 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.

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VMcCORMICK A-0011 C Stream Relocation
ATAYLOR Hyatt Mill Creek, Clay County, NC
GEOMORPHIC ASSESSMENTS
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 medium
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

V McCORMICK A-0011 C Stream Relocation
ATAYLOR 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 meander 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 (ft/ft) 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

V McCORMICK A-0011 C Stream Relocation
ATAYLOR 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
Count 1 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 E 0 c cn z-
a� * C cn
D _� x a - -- u) o
s o
N cn vnaicD _ c
01 CO -a fD ' a 0 'a 3 S n 4 '' a ca N o C4
<D A o vo v � � rt o v � 2 �. " N
N-h. 7 .rt. 3 S CP .r N fl1 N
7
XS-1
(riffle) 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) 28.3 1.6 6.4 9.1 1.3 0.7 12.9 4.4 0.58 0.65 0.97 (5032
) 0.032
(run) 55.5 1.6 8.6 6.9 1.7 1.2 5.5 6.5 0.73 1.05 1.12 (XS-4
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

V McCORMICK A-0011 C Stream Relocation
ATAYLOR Hyatt Mill Creek, Clay County, NC
The existing conditions hydraulic variables analysis for Hyatt Mill Creek focuses on XS-1 and XS-4
since they are the most representative of bankfull flow conditions. Results for XS-2 and XS-3 are
provided in Table 3 for information purposes only since they are unlikely to be representative of
bankfull conditions due to XS-2 being a pool and XS-3 being in close proximity (downstream) of the
existing 60" RCP, which disrupts natural flow conditions.
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
lb/ft2), 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

V McCORMICK A-0011 C Stream Relocation
ATAYLOR 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 meander length 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 (ft/ft) 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

V McCORMICK A-0011 C Stream Relocation
ATAYLOR 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
Count 1* 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
Hydraulic 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
0. o C E n C < N o
0 w D 0 G x 0 su C O 0 �_ c N O
CD 3Q- O
Z 03 SU c CD to cn a 0 13 7 5- n 4, -, a _s CD P o to
fQ 0 CD 3 `< t% al 11, Cl) Z C O 3
�D 0 o Vl Pt 7.�D ten, 3 ,*F Q 7
CD
0 `Z 0 CD
(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 lb/ft2) 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

V McCORMICK A-0011 C Stream Relocation
ATAYLOR Hyatt Mill Creek, Clay County, NC
Reference Reach 2
Geomorphic Variables
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 lb/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

V McCORMICK A-0011 C Stream Relocation
ATAYLOR Hyatt Mill Creek, Clay County, NC
Table 8. Reference Reach 2 Existing Hydraulic Characteristics at Bankfull Discharges
_0. n 3 0C C Cl, s
Z p1 I
y Q U
n -, S f�D U
m en rt N S rt -. < N aD 3 'a 6 1 y 0 (n Z a E O 7
- 0 co
.... 3 .rt�.. 21 3 v rt N N
G1 3 '< C 3
XS-1
(riffle) 27.3 1.1 7.0 9.6 1.0 0.7 13.0 3.9 0.49 0.46 0.83 (33 0.031
5)
(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
XS-3
(riffle) 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%. 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

VMcCORMICK A-0011 C Stream Relocation
ATAYLOR 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 type C4 C4b C4
Drainage 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 __ 8.6 -- -- 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 length (ft) 68 81 89 -- 93 -- 37 48 55
Ratio of meander 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 I 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
Sinuosity 1.08 1.21 1.22
Valley slope (ft/ft) 0.017 0.026 0.014
Average 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
*There is a 100 ft radius curve where the proposed alignment transitions into the existing alignment at the upstream limits. This 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

V McCORMICK A-0011 C Stream Relocation
ATAYLOR 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 lb/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

V McCORMICK A-0011 C Stream Relocation
ATAYLOR 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 Sizing
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 (ic;*) 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: zcj = 0.0375( )-
(1)
ds0
Shields Equation: ici = zci()is — YW) * di (2)
where ic;* is the critical dimensionless shear stress of the d; fraction, Tel is shear stress (Ib/ft2) of the
design flow, d; is the sediment size being assessed, d50 is the median sediment size, ys is the bulk
weight of sediment (165 lb/ft3), and yW is the density of water (62.4 lb/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 = 0.57d50. Substituting these assumed values into equation (1) gives:
Zcd30 = 0.0375 * (0.57d50) —0.872 (3)
ds0
which yields:
Zcd30 = 0.061 (4)
Therefore, the dimensionless critical shear stress (tC;*) used in equation (2) is 0.061. Rearranging to
solve for d3o (ft) yields:
d30 = 0.159icd30 (6)
Page 14 of 22

V McCORMICK A-0011 C Stream Relocation
ATAYLOR Hyatt Mill Creek, Clay County, NC
The largest shear stress calculated at the 10-year recurrence interval discharge is 3.35 lb/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 lbs/ft2. Using this value as
Tcd30 produces a stable D30 of 8.6 inches. The approximate D50 size is calculated by dividing the D3o
grain size by 0.57. This gives an approximate D50 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 lbs/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

V McCORMICK A-0011 C Stream Relocation
ATAYLOR 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
Corpus amomum Silky Dogwood OBL
Trees and Shrubs
Pinus virginiana Virginia Pine UPL
Robinia pseudoacacia Black Locust FACU
Platanus occidentalis Sycamore FACW
Acer rubrum Red Maple FAC
Corpus amomum Silky Dogwood FACW
Viburnum dentatum Spicebush FAC
Lindera benzoin Southern Arrowwood FAC
Corylus americana American Hazlenut FACU
Embankment Shrubs
Corpus racemosa Gray Dogwood FAC
Hamamelis virginiana American Witchhazel FACU
Viburnum dentatum Southern Arrowwood FAC
Sambucus racemosa Red Elderberry 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
(lbs/acre)
August 1 —June 1*
18 Creeping Red Fescue
8 Big Bluestem
6 Indiangrass
4 Switchgrass
35 Rye Grain
May 1 —September 1*
18 Creeping Red Fescue
8 Big Bluestem
6 Indiangrass
4 Switchgrass
25 German or Browntop Millet
*During periods of overlapping dates, the kind of seed
to be used shall be determined.
Page 16 of 22

McCORMICK A-0011 C Stream Relocation
ATAYLOR Hyatt Mill Creek, Clay County, NC
HYDROLOGIC AND HYDRAULIC ANALYSIS
Hydrologic Methodology
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. Hydrologic Discharges
FLOWS (ft3/s)
Reach
2-Year 10-Year 25-Year 50-Year 100-Year Bankfull
Hyatt Mill 91.27 234.47 336.96 423.99 517.93 39
Page 17 of 22

V McCORMICK A-0011 C Stream Relocation
ATAYLOR Hyatt Mill Creek, Clay County, NC
Hydraulic Methodology
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.
Manning'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.
Expansion 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

V McCORMICK A-0011 C Stream Relocation
ATAYLOR Hyatt Mill Creek, Clay County, NC
Existing Structures
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 lb/ft2 to 2.89 lb/ft2 for
the 2-year storm and 0.20 lb/ft2 to 2.99 lb/ft2 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 lb/ft2 to 2.41 lb/ft2 for
the 2-year storm and 0.29 lb/ft2 to 3.34 lb/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

VMcCORMICK A-0011 C Stream Relocation
ATAYLOR Hyatt Mill Creek, Clay County, NC
Table 13. Velocity Comparison
River 2-Year Velocity(ft/s) 10-Year Velocity(ft/s)
Station Existing Proposed Difference Existing Proposed 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 7.49 710/0
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/st) 10-Year Shear Stresses (Ib/s f)
Station Existing Proposed Difference Existing 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

McCORMICK A-0011 C Stream Relocation
ATAYLOR Hyatt Mill Creek, Clay County, NC
Table 15. 100-Year Water Surface Elevation Comparison
River Difference
Existing Proposed
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

McCORMICK A-0011 C Stream Relocation
ATAYLOR 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 fluvial 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 Similarity Principles and Turbulence Research to Bed-Load Movement.
Mitteilungen der Preussischen Versuchsanstalt fur Wasserbau and Schiffbau, Berlin. In: Ott, W.P. and
van Uchelen, J.C. (translators), California Inst. 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.usgs.gov/ss/for the state of North Carolina, accessed on June 27, 2018.
Page 22 of 22

APPENDIX A:
SITE MAPPING

APPENDIX A- 1 :
Hyatt Mill Creek Site Mapping

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APPENDIX A-2:
Reference Reach 1 Site Mapping

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APPENDIX A-3 :
Reference Reach 2 Site Mapping

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APPENDIX B :
PHOTOGRAPHS

A-OO11C Stream Relocation Design
Appendix B: Photographs
Hyatt Mill Creek Representative Photographs
Facing US towards 60"CMP(Photo#22) Facing DS from 60"RCP(Photo#23)
i 7h ` 4." _mac - F r F �t' `*� t v "" j ., .i: L+"
vfr
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Facing US in densely vegetated US reach(Photo#36) Facing DS in densely vegetated US reach(Photo#37) �►
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'I

A-0011 C Stream Relocation Design
Appendix B: Photographs
Hyatt Mill Creek Representative Photographs
Facing US from debris jam(Photo#42) Facing DS towards debris jam(Photo#41)
•11.�" i *wZ b ,�w�",?a ^ m�'$y r "' •y@' i - r ` .�\ w °", ',' i.7 Jr
s L a L _en 1 4`
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Facing US XS-1 (Photo#82) Facing DS XS-1 (Photo#83)
J+� 7 ;it s� i'y 'I'/' i`�
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11
ys "`R 'mo t -t y - �l

A-001 I C Stream Relocation Design
Appendix B: Photographs
Hyatt Mill Creek Representative Photogra74:
,, „7,,,,,,---,..;itt.*:
Facing US XS-2 (Photo#143) y Facing DS XS-2 (Pho44)
III. f ,j,.'4-?! ' fir 4 k. ' °tea rn� r �� ��
a • r as -- , i __
.a Syr: �:. T -r .�.dv _
/ �, ., k - d r a =r ,s:7� y
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ir'_
pp .1 410-
17hti`�I-: R` � ,,r,
N. _ �
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r4 h": 5y:' S/L' < ./ .r. k
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b yy :yam Yy
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y / � 6111L-
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n L iViccC
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'+P. �.;.:' •a `'•�` •i+ _ i S a '�, �� Y ,f/ ^g �� it A 414-
.'•- � rig

A-0011C Stream Relocation Design
Appendix B: Photographs
Hyatt Mill Creek Representative Photographs
Facing US towards 60” RCP (Photo #100) Facing DS from 60” RCP (Photo #101)
Facing US XS-3 (Photo #149) Facing DS XS-3 (Photo #147)

A-00A 1IC
ppendix StreamB:RelocationPhotographs Design
Hyatt Mill Creek Representative Photographs
Facing US XS-4 (Photo#151) Facing DS XS-4 (Photo#153)
�� ��
s - * �s� ' '. e
�w,.• 8 :h Y,},a 4.* �'a r i4
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,! 1
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Facing US Hyatt Mill Creek from confluence with Coleman Creek(Photo Facing DS towards box culvert from Coleman Creek(Photo#131)
#130)
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A-0011 C Stream Relocation Design
Appendix B: Photographs
Hyatt Mill Creek Representative Photographs
Fa�ciinrg US in Coleman Creek(Photo#135) Facing DS in Coleman Creek(Photo#136)
F
. z. ;' t', p�'yg�y^ '`` �.f' . yu' �'{ big' ra _d Y `✓ .
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4:1
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g , �� :-'' :t £..�tip 4 r `1� T' t� ai
Fa

A-0011 C Stream Relocation Design
Appendix B: Photographs
Reference Reach 1 Representative Photographs
Facing US towards bedrock cascade at start of profile (Photo#4) Facing DS from bedrock cascade(Photo#5)
en.
•
.. ..„... iivt„.. ....... _ , -
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Facing US at XS-1 (Photo#21) Facing DS at XS-1 (Photo#22)
. rr��
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1 y i- 1'+a" .iy -ra1.1 `1 p- - .

A-0011 C Stream Relocation Design
Appendix B: Photographs
Reference Reach 1 Representative Photographs
Facing US XS-2 (Photo#32) Facing DS XS 2 (Photo#35)
„— . r r� t'�� '"�A k*1.;ate
f !1-.7 3 x _. s. a 3 y .'f�, �r.�
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Facing US at typical riffle (Photo#45) Facing DS at typical riffle(Photo#39)
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_

A-0011 C Stream Relocation Design
Appendix B: Photographs
Reference Reach 1 Representative Photographs
Facin"ertg US at debris jam(Photo#53) Facing DS at debris jam at end of profile(Photo#54)
` _ t', ,. - I yam` --- ' -,.. i .. .. _
Air
. ,.__ I:, , ...a . .=.4.:7: V %.' • '_'71. — -;', ..,r „..„-t ' -7.45,1''t,„,.i. -im`...-,,, - -i,. I. • , -, -''''‘. ..--- .r.3,,,-- 4,• _ ,,,,, • ...,
144 Y� J.' '4' a'. 4.: r7-7 ' ---
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A-0 0 etegn
Alppendix11 Stream B:R PhotographslocaionD
Reference Reach 2 Representative Photographs
Facing US at fallen log jam riffle at start of profile (Photo#7) Facing DS of fallen log jam riffle (Photo#10)
,,,..,,‘..:....,,,...,3,.., .:‘.-6,..-,r-:,.. .„.iIT-it.,,..,:e.:,. ._ ...
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,.•"-...-.:• .,..:00\,,,,-. .',..-±-.7.-.4.- :.,..--,g-:-•- :' - . :- -d'''-'''.*,--'4)' • '':- ' N''.-
Facing US XS-1 (Photo#22) Facing DS XS-1 (Photo#16)
,3':� ^ �- i�h .' ate: : :\4Li
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ir
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: (- Lam. !" em >
iiii
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r
ems. # �3 e \ - ;d." 1�'•

A-0011 C Stream Relocation Design
Appendix B: Photographs
Reference Reach 2 Representative Photographs
Facing US past scour pool(Photo#25) Facing DS past scour pool(Photo#24)
#T y 4.����s s� {X f X�e1 w p o r
`
sa �. �R a a v 'wy
.)1141:N•••:.--"2.' -- -;77- --.,„:.....e :isiv.-., vro,Aufk:. „.._,•,:.•-;„,*IL:: ,. •-•,..,„--,
,� !y d�� }�� 10�. ��..�- l ` _
T sy �L �`.. - bk,;*.l.t.f - • fY v1
tip. * •
•
Facing US XS-2 (Photo#59) Facing DS XS-2 (Photo#61)
,-..-r • 4-/ ip - ... ...„......1
*Nricrit
I .
r 4- i
.LIISN".' -
y
, _ d„e .�-- \ .dam-
_ P ; , �'�r
',',,'.-,.47-_..-.•-.j'„-,,I 4-,...,,T..._..,_s_:_„-_.—..-.--"-'--.-,',-„?-..,....,.-.7.r•_r_-.'--_._,--,.e',-..6.,.i)t.,.,-...?..,--4;':,-,V1'—.-.,.-i.-- .0'x.:--9:.:‘...;...;.„_1:,,4_,1,-
rif
p
, `'.. L _, i / , 1 j J e Cop y` ,, - -
' IF
�' �Y of W .1-i-Y� �� • ' s�
` % y•
tin f '
•
1 -}f -- , 1,al.'s. . . .

A-0011 C Stream Relocation Design
Appendix B: Photographs
Reference Reach 2 Representative Photographs
Facing US XS-3 (Photo#86) Facing DS XS-3 (Photo#88,, t, \._ ,. !
•it i �r e
-
, \., , l'Cr - , - ,.
a e _
\ rt
•
.,r - Yf ' f.• r � wr .Y`. 4a ...F
6•u�r - : .
2.'4
.. t4'c 7Vi
b °••
•Y ? e
Facing US typical channel and floodplain (Photo#65) Facing DS typical channel and floodp.lain(Photo#63)
yyy g ff Ct f �bf f �� 1 v fi
- 1 ^l ,,,, J -mod ,
•
Sri'3' * � -h\� f `�l '�.T . ✓1 i a r' _ '• _/
� - ' ,r'iri f.,y4 -4 7 tt , ' dr , ' t. -.... ,r_.i
a h? �. FFFFFF A; 1 , - - t. ,•, -�+
rw a,
,ter. •.
.Y --`r"«: Ems.
Yry S rry .� d,_•. • ._ ig �' °3 #rA,y' '2"l.rl y�
Idt
kV;: '' . �_ �
t
.'
i 1 ; *sr

A-0011 C Stream Relocation Design
Appendix B: Photographs
Reference Reach 2 Representative Photographs
Facing US at mid-channel bar(Photo#71) Facing DS at mid-channel bar,location of PC-3 (Photo#72)
.ti t' 1 ram ° - • _ r -
, ...A.,:..:,..tir,:"..._
/ �
. �� .. jam-
a ICY
• �-. i �illiV �w
_' * tom
'► P , e - • "" . b N• ' rr "� 7.R �
-
•
8 '� a '. 4 Hi
-r f• f .x . ",_ .::MSr k • . ._'.
•
•
'LVI
!' T
Facing US small perennial tributary(Photo#81) Facing DS mainstcm at confluence with perennial tributary(Photo#80)
- ,E ; R Pi
r4?'"' ''-iii-r.L.,i
$/i
t 'ya`_v-
qir„F.,,,10., 7...,ii, , ._ ...,,. „... ,,,-46S., , A...,..,,,A. ,
R tf 1 i V.8
V.
I ' IlititV-- -- ',""`"
l (/ °`VF W,-� -. - _ w. - .. " /te a ,q. rf
(_ ,., L� v� ,. 1 ` _r� ` • 11
t.
11.:
it
v>f ! P• d �,i,:' :r: .' -, s % ' ,a
(' ,�,�M ,. I . ' y
;� IYrr !f .fr ` Yhj ` .i -., ,A,,,
r .; f J9 for
5

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
ross Section 1
1 +93 NC-69 Stream Relocation, Riffle
92
91.5 T
---
91
fis
88.5 10 15 20 25 30 35 40 45
Width
Bankfull Dimensions Flood Dimensions Materials
7.3 'x-section area(ft.sq.) 22.7 'W flood prone area(ft) - 'D50 (mm)
8.8 'width(ft) 2.6 'entrenchment ratio - D84 (mm)
0.8 'mean depth(ft) -- 'low bank height(ft) 33 'threshold grain size(mm):
1.3 'max depth(ft) -- 'low bank height ratio
9.4 'wetted parimeter(ft)
0.8 'hyd radi(ft)
10.6 'width-depth ratio
Bankfull Flow Flow Resistance Forces&Power
4.8 'velocity(ft/s) 0.031 'Manning's roughness 1.4 'channel slope(%)
35.1 'discharge rate(cfs) 0.12 'D'Arcy-Weisbach fric. 0.68 'shear stress(Ib/sq.ft.)
0.96 'Froude number -- 'resistance factor u/u* 0.59 'shear velocity(ft/s)
186 -150.9 -- 'relative roughness 3.5 �unit strm power(lb/ft/s)
Distance' BS ' HI FS 'Elevation Omit Notes
Cross Section - ft ft ft Bkf
Riffle I 96.9 .54 91.36 ❑�
reference ID._ 1 96.9 5.15 91.75 ❑�
instrument height.118.9 96.9 96.9 _ 5.43 91.47 ❑
longitudinal station 193.0 96.9 5.78 91.12 ❑
96.9 6.55 90.35 ❑
Bankfull Stage 96.9 7.23 89.67 ❑
FS 96.9 7.79 89.11 ❑
elevation 96.9 7.88 89.02 ❑
96.9 7.87 89.03 ❑
Low Bank Height 96.9 7.73 89.17 ❑
FS 96.9 7.49 89.41 ❑
elevation 96.9 7.14 89.76 ❑
96.9 6.01 90.89 ❑
Flood Prone Area 96.9 5.16 91.74 ❑
width fpa 34.9 96.9 5.27 91.63 ❑
96.9 91.26 ❑�
Channel Slope ❑
percent slopeW I ❑
Flow Resistance _ ❑
Manning's"n' ❑
D'Arcy-Weisbach"f� ❑
Note: ❑

Appendix C-1: Cross Sections
A-OO11C Stream Relocation Design
Hyatt Mill Creek Cross Section 2
Cross Section 2
2+82 NC-69 Stream Relocation, Pool
91
90.5
90
89.5
.ri /'
c
0
. 89
_o
w88.5
88
87.5
87
0 5 10 15 20 25 30 35 40 45 50
Width
Bankfull Dimensions Flood Dimensions Materials
8.0 'x-section area(ft.sq.) 87.0 'W flood prone area(ft) - 'D50 (mm)
6.5 'width(ft) 13.5 'entrenchment ratio - D84 (mm)
1.2 'mean depth(ft) -- 'low bank height(ft) 42 'threshold grain size(mm):
1.8 'max depth(ft) -- 'low bank height ratio
8.2 'wetted parimeter(ft)
1.0 'hyd radi(ft)
5.2 'width-depth ratio
Bankfull Flow Flow Resistance Forces&Power
5.8 'velocity(ft/s) 0.030 'Manning's roughness 1.4 'channel slope(%)
46.2 'discharge rate(cfs) 0.11 'D'Arcy-Weisbach fric. 0.85 'shear stress(Ib/sq.ft.)
1.03 'Froude number -- 'resistance factor u/u* 0.66 'shear velocity(ft/s)
186 -139.8 -- 'relative roughness 6.3 .unit strm power(lb/ft/s)
Distance BS ' HI " FS 'Elevation Omit Notes
Cross Section ft ft (ft) ft (ft) _ Bkf
P•o•ol1:1 95.2 5.4 89.8 ❑
reference ID 95.2 5.29 89.91 ❑
instrument height Mr 95.2 95.2 5.74 89.46 ❑
longitudinal station.6-82 28- 95.2 5.42 89.78 ❑
95.2 4.98 90.22 ❑
Bankfull Stage 95.2 4.96 90.24 ❑
FS 7 95.2 5.24 89.96 ❑
elevation 95.2 5.86 89.34 ❑
95.2 6.42 88.78 ❑
Low Bank Height 27.8 95.2 6.74 88.46 ❑
ES ❑28 95.2 7.41 87.79
elevation 29.8 95.2 7.78 87.42 ❑
30.8 95.2 7.86 87.34 ❑
Flood Prone Area 32.2 95.2 7.78 87.42 ❑
width fpa1 I 32.9 95.2 6.11 89.09 ❑
35 95.2 4.88 90.32 ❑
Channel Slope 95.2 5.18 90.02 ❑
percent slopel I 95.2 5.66 89.54 ❑
95.2 5.44 89.76 ❑
Flow Resistance 95.2 5.06 90.14 ❑
Manning's"n" 0.03 --- ❑
D'Arcy-Weisbach"f' --- ❑
Note: _ ❑
no notes recorded for this cross section.W ❑
Flood Prone estimated from countours d ❑
9 0

Appendix C-1: Cross Sections
A-OO11C Stream Relocation Design
Hyatt Mill Creek Cross Section 3
Cross Section 3
, 111111
4+17 NC-69 Stream Relocation, Run
89
88.5
88 -
87.5
0
. 87
w 86.5 -
86
85.5
85
0 5 10 15 20 25 30
Width
Bankfull Dimensions Flood Dimensions Materials
6.4 'x-section area(ft.sq.) 32.7 'W flood prone area(ft) -- 'D50 (mm)
9.1 'width(ft) 3.6 'entrenchment ratio -- D84 (mm)
0.7 'mean depth(ft) -- 'low bank height(ft) 32 'threshold grain size(mm):
1.3 'max depth(ft) -- 'low bank height ratio
9.8 'wetted parimeter(ft)
0.7 'hyd radi(ft)
12.9 'width-depth ratio
Bankfull Flow Flow Resistance Forces&Power
4.4 'velocity(ft/s) 0.032 'Manning's roughness 1.6 'channel slope(%)
28.3 'discharge rate(cfs) 0.14 'D'Arcy-Weisbach Trio. 0.65 'shear stress(Ib/sq.ft.)
0.97 'Froude number -- 'resistance factor u/u* 0.58 'shear wlocity(ills)
141.6 -113.3 -- 'relative roughness 3.1 'unit strm power(lb/ft/s)
Distance' BS ' HI ' FS 'Elevation Omit Notes
Cross Section ft (ft) (ft) (ft) (ft) Bkf
Run 1 92.01 88.05 ❑
reference ID 3 7 92.01 4.0 87.96 ❑
instrument height 92.01 92.01 10 92.01 4.37 87.64 ❑
longitudinal station 417 418.5 11.3 92.01 5.41- 86.595 ❑
12.8 92.01 6.11 85.9 0
Bankfull Sta a 13.4 92.01 6.41 85.6 ❑
FS -- 15.2 92.01 6.37 85.64 ❑
elevation -- 16.2 92.01 6.32 85.69 ❑
92.01 5.48 86.53 ❑
Low Bank Hei ht 92.01 5.12 86.89 ❑
FS -- _ 92.01 4.5 87.51 ❑
elevation 92.01 88.63 ❑
Flood Prone Area ❑
width fpa ❑
Channel Slope ❑
percent slop- ❑
Flow Resistance ❑
Manning's"n" 0.032 --- ❑
D'Arcy-Weisbach"f' ❑
Note: ❑
no feature recorded,XS taken 32'DS of I ❑
culvert.W flood prone by extending slope ❑
on left floodplain ❑

Appendix C-1: Cross Sections
A-OO11C Stream Relocation Design
Hyatt Mill Creek Cross Section 4
Cross Section 4
5+56 NC-69 Stream Relocation, Run
87
86.5
86
85.5
° 85
a')84.5
w
84
83.5
83
82.5
0 5 10 15 20 25 30
Width
Bankfull Dimensions Flood Dimensions Materials
8.6 'x-section area(ft.sq.) 32.8 'W flood prone area(ft) -- 'D50 (mm)
6.9 'width(ft) 4.8 'entrenchment ratio -- D84 (mm)
1.2 �mean depth(ft) -- �low bank height(ft) 51 'threshold grain size(mm):
1.7 �max depth(ft) -- �low bank height ratio
8.2 'wetted parimeter(ft)
1.0 'hyd radi(ft)
5.5 'width-depth ratio
Bankfull Flow Flow Resistance Forces&Power
6.5 'velocity(ft/s) 0.030 'Manning's roughness 1.6 'channel slope(%)
55.5 'discharge rate(cfs) 0.10 "D'Arcy-Weisbach Eric. 1.05 'shear stress(Ib/sq.ft.)
1.12 'Froude number -- �resistance factor u/u* 0.73 'shear velocity(ft/s)
186 -130.5 -- 'relative roughness 8 'unit strm power(Ib/ft/s)
Distance' BS ' HI ' FS 'Elevation Omit Notes
Cross Section ft ft (ft) (ft) (ft) Bkf
Run CI 90.86 I 86.22 p
reference ID 4 90.86 86.24 ❑
instrument height 90.86 90.8, 90.86 85.07 ❑
longitudinal station 556 556.0 90.86 84.97 ❑
90.86 83.47 ❑
Bankfull Sta a 90.86 83.16 ❑
FS --- 90.86 83.32 ❑
elevation --- 90.86 84.85 ❑
90.86 85.51 ❑
Low Bank Hei ht 90.86 86.465 0
FS --- 90.86 86.65 ❑
elevation 0
Flood Prone Area ❑
width fpa ❑
Channel Sloe ❑
percent slope 1.9 ❑
Flow Resistance ❑
Manning's"n" 0.03 • ❑
D'Arcy-Weisbach"f' ❑
Note: ❑
no feature or XS station recorded.W Flood I ❑
Prone estimated from countours ❑

Appendix C-1: Cross Sections
A-OO11C Stream Relocation Design
Reference Reach 1 Cross Section 1
Cross Section 1
0+44 NC-69 Stream Relocation, Riffle
94.5
94
93.5
0 93
92.5
92
91.5
91
0 5 10 15 20 25 30
Width
Bankfull Dimensions Flood Dimensions Materials
9.1 x-section area(ft.sq.) 23.8 W flood prone area(ft) --- D50 (mm)
9.9 width(ft) 2.4 entrenchment ratio --- D84 (mm)
0.9 mean depth(ft) - low bank height(ft) 60 threshold grain size(mm):
1.2 max depth(ft) - low bank height ratio
10.7 wetted parimeter(ft)
0.9 hyd radi(ft)
10.7 width-depth ratio
Bankfull Flow Flow Resistance Forces&Power
4.9 wlocity(ft/s) 0.041 Manning's roughness 2.3 channel slope(%)
44.9 discharge rate(cfs) 0.21 D'Arcy-Weisbach tric. 1.22 shear stress(Ib/sq.ft.)
0.95 Froude number - resistance factor u/u* 0.79 shear velocity(ft/s)
186 -141.1 - relative roughness 6.5 �unit strm power(Ib/ft/s)
Distance BS HI FS Elevation Omit Notes
Cross Section ft ft (ft) ft (ft) Bkf
Riffle -I 99.85 5.6 94.25 F
reference ID 1 99.85 5.98 93.87
instrument height 99.85 96.9 99.85 6.15 93.7 ❑
longitudinal station 44 193.0 99.85 6.7 93.15 ❑
99.85 7.79 92.06 ❑
Bankfull Sta e 99.85 _ 8.21 91.64 ❑
FS =92.85 elev 99.85 8.22 91.63 ❑
elevation -- 99.85 8.22 91.63 ❑
99.85 8.08 91.77 ❑
Low Bank Hei ht 99.85 7.89 91.96 ❑
FS -- 99.85 7.72 92.13 ❑
elevation 99.85 7.79 92.06 ❑
99.85 7 92.85 ❑
Flood Prone Area 99.85 93.64 ❑
width fpa 23.8 99.85 94.34 ❑
Channel Slope ❑
percent slope' ' ❑
Flow Resistance ❑
Manning's"n" ❑
D'Arcy-Weisbach"f' ❑
Note: ❑

Appendix C-1: Cross Sections
A-OO11C Stream Relocation Design
Reference Reach 1 Cross Section 2
Cross Section 2
1+5 NC-69 Stream Relocation, Pool
93.5
93
92.5
92
0
. ::;
90
89.5
0 5 10 15 20 25 30
Width
Bankfull Dimensions Flood Dimensions Materials
8.7 x-section area(ft.sq.) 83.0 W flood prone area(ft) - D50 (mm)
9.8 width(ft) 8.4 entrenchment ratio - D84 (mm)
0.9 mean depth(ft) -- low bank height(ft) 50 threshold grain size(mm):
1.3 max depth(ft) -- low bank height ratio
11.2 wetted perimeter(ft)
0.8 hyd radi(ft)
11.1 width-depth ratio
Bankfull Flow Flow Resistance Forces&Power
4.5 velocity(ft/s) 0.041 Manning's roughness 2.1 channel slope(%)
38.9 discharge rate(cfs) 0.21 D'Arcy-Weisbach fric. 1.02 shear stress(Ib/sq.ft.)
0.89 Froude number -- resistance factor u/u* 0.73 shear velocity(ft/s)
186 -147.1 -- relative roughness 5.2 �unit strm power(Ib/ft/s)
Distance BS HI FS Elevation Omit Notes
Cross Section ft ft (ft) _ (ft) (ft) _ Bkf
Pool 97.02 92.82 ❑
reference ID 97.02 92.92 ❑
instrument height 97.02 92.16 ❑
longitudinal station 1.94 97.02 91.89 ❑ ndercut
1.92 97.02 91.87 • ndercut
Bankfull Stage 1.35 97.02 91.3 • undercut
FS =91.26 el( 0.9 97.02 90.85 • undercut
elevation 97.02 89.95 ❑ -nd undercut
97.02 90 ❑
Low Bank Height 97.02 90.29 ❑
FS 97.02 90.69
elevation ❑
97.02 91.26 ❑
97.02 91.51 ❑
Flood Prone Area 97.02 91.71 ❑
width fpal 97.02 91.43 ❑
97.02 91.38 ❑
Channel Slope _ _ _ _ ❑
percent slope 1 ❑
Flow Resistance ❑
Manning's"n" 0.041 --- ❑
D'Arcy-Weisbach"f' --- ❑
Note: _ ❑
Width Flood Prone ❑
width from GIS contours
❑

Appendix C-1: Cross Sections
A-OO11C Stream Relocation Design
Reference Reach 2 Cross Section 1
Cross Section 1
0+36 NC-69 Stream Relocation, Riffle
96.5
96
c 95.5
w 95
I"...........**---7
94.5
94 1
0 5 10 15 20 25 30 35
Width
Bankfull Dimensions Flood Dimensions Materials
7.0 x-section area(ft.sq.) 31.1 W flood prone area(ft) - D50 (mm)
9.6 width(ft) 3.3 entrenchment ratio - D84 (mm)
0.7 mean depth(ft) -- low bank height(ft) 23 threshold grain size(mm):
1.0 max depth(ft) -- low bank height ratio
10.4 wetted parimeter(ft)
0.7 hyd radi(ft)
13.0 width-depth ratio
Bankfull Flow Flow Resistance Forces&Power
3.9 velocity(ft/s) 0.031 Manning's roughness 1.1 channel slope(%)
27.3 discharge rate(cfs) 0.13 D'Arcy-Weisbach fric. 0.46 shear stress(Ib/sq.ft.)
0.83 Froude number -- resistance factor u/u* 0.49 shear velocity(ft/s)
186 -158.7 -- relative roughness 1.96 'unit strm power(lb/Ws)
Distance BS HI FS Elevation Omit Notes
Cross Section (ft) (ft) (ft) (ft) (ft) Bkf
Riffle , 1 100 95.74 0
reference ID 2.4 100 95.46 0
instrument height 100 96.9 3 100 95 0
longitudinal station i 7 100 95.25 0
100 95.43 ❑
Bankfull Sta a 100 95.14 ❑
FS =95.14 elev 100 94.18 ❑
elevation --- 100 94.14 ❑
100 94.44 ❑
Low Bank Hei ht 100 94.42 ❑
FS 100 94.77 ❑
elevation 100 94.78 ❑
100 95.3 ❑
Flood Prone Area 100 95.58 ❑
width fpa&Lad - 100 96.07 ❑
100 96.16 ❑
Channel Slope ❑
percent slope 1.9 ❑
Flow Resistance ❑
Manning's"n" 0.031 --- ❑
D'Arcy-Weisbach"f' --- ❑
Note: ❑
Width flood prone area by extending left ❑
flood plaine slope 0

Appendix C-1: Cross Sections
A-OO11C Stream Relocation Design
Reference Reach 2 Cross Section 2
Cross Section 2
0+97 NC-69 Stream Relocation, Pool
96
95.5 -
95
•
0 94.5
ar 94
w
93.5
93
92.5
0 2 4 6 8 10 12 14 16 18 20
Width
Bankfull Dimensions Flood Dimensions Materials
4.8 x-section area(ft.sq.) 110.0 W flood prone area(ft) -- D50 (mm)
6.6 width(ft) 16.6 entrenchment ratio -- D84 (mm)
0.7 mean depth(ft) --- low bank height(ft) 22 threshold grain size(mm):
1.1 max depth(ft) --- low bank height ratio
7.5 wetted parimeter(ft)
0.648 hyd radi(ft)
9.0 width-depth ratio
Bankfull Flow Flow Resistance Forces&Power
3.9 selocity(ft/s) 0.030 Manning's roughness 1.1 channel slope(%)
18.9 discharge rate(cfs) 0.12 D'Arcy-Weisbach fric. 0.44 shear stress(Ib/sq.ft.)
0.85 Froude number --- resistance factor u/u* 0.48 shear velocity(ft/s)
186 -167.1 --- relative roughness 1.96 'unit strm power(Ib/ft/s)
Distance BS HI FS Elevation Omit Notes
Cross Section (ft) (ft) (ft) ft (It) Bkf
Pool CI 98.16 3.4 94.76 ❑
reference ID 2 98.16 3.29 94.87 ❑
instrument height 98.16 95.2 98.16 4.11 94.05 ❑
longitudinal station 97 282.0 98.16 5.0 93.09 ❑
98.16 93.17 ❑
Bankfull Sta a 98.16 93.29 ❑
FS 98.16 93.77 ❑
elevation --- 98.16 94.22 ❑
98.16 94.37 ❑
Low Bank Height 98.16 94.42 ❑
FS ❑
elevation ❑
Flood Prone Area ❑
width fpal ❑
111
Channel Slope ❑
percent slope) ❑
Flow Resistance ❑
Manning's"n" ❑
D'Arcy-Weisbach"f' ❑
Note: ❑
Width flood prone area by extending left' _ ❑
flood plaine slope ❑

Appendix C-1: Cross Sections
A-OO11C Stream Relocation Design
Reference Reach 2 Cross Section 3
Cross Section 3
1+15 NC-69 Stream Relocation, Riffle
95.5
95
=94.5
0
w 94
\\ J
93.5
93
0 5 10 15 20 25 30 35
Width
Bankfull Dimensions Flood Dimensions Materials
4.4 x-section area(ft.sq.) 110.0 W flood prone area(ft) -- D50 (mm)
6.7 width(ft) 16.4 entrenchment ratio -- D84 (mm)
0.7 mean depth(ft) --- low bank height(ft) 22 threshold grain size(mm):
0.9 max depth(ft) --- low bank height ratio
7.3 wetted parimeter(ft)
0.6 hyd radi(ft)
10.2 width-depth ratio
Bankfull Flow Flow Resistance Forces&Power
3.8 velocity(ft/s) 0.031 Manning's roughness 1.2 channel slope(%)
16.7 discharge rate(cfs) 0.13 D'Arcy-Weisbach fric. 0.46 shear stress(Ib/sq.ft.)
0.85 Froude number --- resistance factor u/u* 0.48 shear velocity(ft/s)
141.6 -124.9 --- relative roughness 1.86 'unit strm power(Ib/ft/s)
Distance BS HI FS Elevation Omit Notes
Cross Section ft ft (ft) (ft) (ft) Bkf
RiffleI:I 1 98.32 94.53 ❑'/
reference ID 3 4 98.32 94.38 0
instrument height 98.32 92.01 5.5 98.32 94.18 0
longitudinal station 115 418.5 6.5 98.32 93.98 0
8 98.32 94.35 0
Bankfull Sta e 14 98.32 94.24 ❑
FS =94.03 elev 98.32 93.97 ❑
elevation 98.32 93.4 ❑
98.32 93.12 ❑
Low Bank Height 18.9 98.32 93.1 ❑
FS - 19.5 98.32 93.23 ❑
elevation I 98.32 93.18 ❑
98.32 93.32 ❑
Flood Prone Area 98.32 94.03 ❑
width fpa 110 29.0 98.32 93.86 0
98.32 94.51 0
Channel Slope Mil 98.32 0 94.27 0
percent slope 1.9 ❑- -
111
Flow Resistance ❑
Manning's"n" 0.031 --- ❑
D'Arcy-Weisbach"f' ❑
111
Note: ❑
Width flood prone area by extending left ❑
flood plaine slope 111

APPENDIX C-2:
LONGITUDINAL PROFILE

Appendix C-2: Longitudinal Profile
A-OO11C Stream Relocation Design
Hyatt Mill Creek Profile
NC-69 Stream Relocation
—.—bed water srf ❑ x-section o riffle crest • pool ■ run c glide x LB + RB - bankfull
96
94
92 J
- 90
.2• 88
86
84
82
A A A
80 , 193.0 282.0- -418.5 556.0
0 100 200 300 400 500 600 700
Channel Distance(ft)

Appendix C-2: Longitudinal Profile
A-OO11C Stream Relocation Design
Reference Reach 1 Profile
NC-69 Stream Relocation
+bed twatersrf o x-section o riffle crest 0 pool El run glide x LB + RB - bankfull
97
96 X
95
94 •
-
93
0 92 • -
8 91 - X
w90 -
f
89 -
88 A
44.0 r 105.0
87
0 20 40 60 80 100 120 140 160 180 200
Channel Distance(ft)

Appendix C-2: Longitudinal Profile
A-OO11C Stream Relocation Design
Reference Reach 2 Profile
NC-69 Stream Relocation
—0—bed — water srf 0 x-section o riffle crest o pool • run o glide x LB + RB - bankfull
96
95.5 - —
95
94.5
94 — +
.$3.5 -
m
42.5 -
92 -
91.5 - 0 A A
91 36.0 97.0 115.0
0 50 100 150 200 250
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 Surface
Material Size Range(mm Count Riffle Surface Pebble Count, NC-69 Stream Relocation
silt/clay 0 - 0.062 _
very fine sand 0.062 - 0.125
cumulative% cobble
fine sand 0.125 - 0.25
medium sand 0.25 - 0.5 _ 100% silt/clay sand gravel 1, obble boulder 30
coarse sand 0.5 - 1 _
very coarse sand 1 - 2 90% -
very fine gravel 2 -4 80% - i — 25
fine gravel 4 - 6
fine gravel 6 - 8 2 70% -
medium gravel 8 - 11 — 20 c
medium gravel 11 - 16 = 60/° m
coarse gravel 16 - 22 _ '
50% — — 15 0
coarse gravel 22 - 32 6
sv
very coarse gravel 32 -45 a 40% -
very coarse gravel 45 - 64 — 10 m
small cobble 64 - 90 30% - w
medium cobble 90 - 128
large cobble 128 - 180 20% — 5
very large cobble 180 - 256 10% -
small boulder 256 - 362 j _ .0/
small boulder 362 - 512 0% r 0
medium boulder 512 - 1024 0.01 0.1 1 10 100 1000 10000
large boulder 1024 - 2048 particle size(mm)
very large boulder 2048 -4096
total particle count: 150
Size(mm) ' Size Distribution Type
bedrock D16 6.4 meari 15.0 silt/clay 0%
clay hardpan D35 11 dispersion 2.4 sand 7%
detritus/wood D50 17 skewness -0.06 gravel 91%
artificial D65 22 cobble 2%
total count: 150 D84 35 boulder 0%
D95 54
Note:

Appendix C-3: Sediment Data
A-OO11C Stream Relocation Design
Hyatt Mill Creek Pebble Count 2
Riffle Surface T
Material Size Range(mni Count Riffle Surface Pebble Count, NC-69 Stream Relocation
silt/clay 0 - 0.062 _
very fine sand 0.062 0.125 —cumulative% cobble
fine sand 0.125 - 0.25
medium sand 0.25 - 0.5 100% silt/clay sand ravel cobble boulder 45
coarse sand 0.5 - 1
very coarse sand 1 - 2 90% - — 40
very fine gravel 2 -4 80% -
fine gravel 4 - 6 cas
— 35
fine gravel 6 - 8 70% - — 30 c
mediumgravel 8 - 11 60%
c -
medium gravel 11 - 16 _ `� — 25 m
coarse gravel 16 - 22 _ aci 50% —
coarse gravel 22 - 32 2 40% _ — 20 w
very coarse gravel 32 -45 a — 15
very coarse gravel 45 - 64 30% -
small cobble 64 - 90 20% - — 10
medium cobble 90 - 128A—.---".-1.°°:l
large cobble 128 - 180 10% - — 5
very large cobble 180 - 256 0% I I I i I e 0
small boulder 256 - 362 0.01 0.1 1 10 100 1000 10000
small boulder 362 - 512
medium boulder 512 - 1024 particle size(mm)
large boulder 1024 - 2048
very large boulder 2048 -4096
total particle count: 150
Size(mm) Size Distribution Type
bedrock D16 4.9 3.4 mean 13.1 silt/clay 0%
clay hardpan D35 16 12 dispersion 2.9 sand 14%
detritus/wood D50 20 17 skewness -0.20 gravel 82%
artificial I D65 25 20 cobble 4%
total count: 150 D84 35 29 boulder 0%
D95 60 39
Note:

Appendix C-3: Sediment Data
A-OO11C Stream Relocation Design
Hyatt Mill Creek Pebble Count 3
Bed Surface
Material Size Range(mni Count Bed Surface Pebble Count, ---
silt/clay 0 - 0.062 _ —cumulative% cobble
very fine sand 0.062 - 0.125
fine sand 0.125 - 0.25
medium sand 0.25 - 0.5 100% silt/clay sand gravel obble boulder 40
coarse sand 0.5 - 1
very coarse sand _ _ 1 - 2 90% - 35
J
very fine gravel 2 -4 80% -
fine gravel 4 - 6 _ - 30
fine gravel 6 - 8 r 70% - / „
medium gravel 8 - 11 - 25 5
medium gravel 11 - 16 w 60% -
coarse gravel 16 - 22 E. 50% - ---- - 20 0
coarse gravel 22 - 32 2 I/II
-0very coarse gravel 32 45 a 40% - 15 avery coarse gravel 45 - 64 msmall cobble 64 - 90 30% - N
medium cobble 90 - 128 ' I II III - 10
large cobble 128 - 180 20%
very large cobble 180 -256 10% - I - 5
small boulder 256 - 362 _
i
small boulder 362 - 512 0% Lull I I i I r I • 0
medium boulder 512 - 1024 0.01 0.1 1 10 100 1000 10000
large boulder 1024 - 2048 particle size(mm)
very large boulder 2048 -4096 _
total particle count: 156
Size(mm) Size Distribution Type
bedrock D16 0.41 mean 3.4 silt/clay 0%
clay hardpan D35 7.1 dispersion 17.0 sand 22%
detritus/wood D50 13 skewness -0.42 gravel 77%
artificial D65 19 cobble 1%
total count: 156 D84 29 boulder 0%
D95 44
Note:

Appendix C-3: Sediment Data
A-OO11C Stream Relocation Design
Reference Reach 1 Pebble Count 1
Riffle Surface
Material Size Range(mm Count Riffle Surface Pebble Count, NC-69 Stream Relocation
silt/clay 0 - 0.062 _
very fine sand 0.062 - 0.125
cumulative% cobble
fine sand 0.125 - 0.25
medium sand 0.25 - 0.5 _ 100`)/0silt/clay sand gravel cobble boulder 25
coarse sand 0.5 - 1 _
very coarse sand 1 - 2 90% -
very fine gravel 2 -4 80% - i — 20
fine gravel 4 - 6 i
fine gravel 6 - 8 2 70% -
medium gravel 8 - 11
° i 3
medium gravel 11 - 16 60/° i — 15 o
coarse gravel 16 - 22 ' 50%° o
— i
coarse gravel 22 - 32 ( i -6
very coarse gravel 32 -45 a 40% - I I I ' i — 10 a
very coarse gravel 45 - 64 i m
small cobble 64 - 90 30% -
medium cobble 90 - 128 i
large cobble 128 - 180 20% - i — 5
very large cobble 180 - 256 10% - I
small boulder 256 - 362
small boulder 362 - 512 0% r r 0
medium boulder 512 - 1024 0.01 0.1 1 10 100 1000 10000
large boulder 1024 - 2048 particle size(mm)
very large boulder 2048 -4096
total particle count: 150
Size(mm) 1 Size Distribution Type
bedrock D16 6.2 mean 21.4 silt/clay 0%
clay hardpan D35 12 dispersion 3.5 sand 3%
detritus/wood D50 19 skewness 0.05 gravel 79%
artificial D65 31 cobble 18%
total count: 150 D84 74 boulder 1%
D95 140
Note:

Appendix C-3: Sediment Data
A-OO11C Stream Relocation Design
Reference Reach 1 Pebble Count 2
Riffle Surface T
Material Size Range(mm Count Riffle Surface Pebble Count, NC-69 Stream Relocation
silt/clay 0 - 0.062 —cumulative% cobble 1
very fine sand 0.062 - 0.125
fine sand 0.125 - 0.25
medium sand 0.25 - 0.5 100% silt/clay sand gravel cobble, boulder 18
coarse sand 0.5 - 1
very coarse sand 1 - 2 _ 90% 1 I I I — 16
very fine gravel 2 -4 80% -
fine g cas
— 14
fine gravel 6 - 8 70% I I I I I I I II I — 12
mediumgravel 8 - 11 ' 60%
c -
medium gravel 11 - 16 — 10
coarse gravel 16 - 22 _ :le; 50% —
coarse gravel 22 - 32 2 o — 8 7,,,40%very coarse gravel 32 -45 Q- _ 6 .
as
very coarse gravel 45 - 64 30% -
small cobble 64 - 90III 20% - - — 4
medium cobble 90 - 128
large cobble 128 - 180 10% 11
I — 2
very large cobble 180 - 256 _ 0% J r r 0
small boulder 256 - 362 0.01 0.1 1 10 100 1000 10000
small boulder 362 - 512
medium boulder 512 - 1024 0 particle size(mm)
large boulder 1024 - 2048 0
very large boulder 2048 -4096 0
total particle count: 150
Size(mm) Size Distribution Type
bedrock D16 4.9 3.4 mean 20.3 silt/clay 0%
clay hardpan D35 13 12 dispersion 4.2 sand 8%
detritus/wood D50 23 17 skewness -0.05 gravel 68%
artificial D65 43 20 cobble 24%
total count: 150 D84 84 29 boulder 0%
D95 120 39
Note:

Appendix C-3: Sediment Data
A-OO11C Stream Relocation Design
Reference Reach 1 Pebble Count 3
Bed Surface
Material Size Range(mm Count Bed Surface Pebble Count, ---
silt/clay 0 - 0.062 _ —cumulative% cobble
very fine sand 0.062 - 0.125
fine sand 0.125 - 0.25
medium sand 0.25 - 0.5 100% silt/clay sand gravel co ble boulder 40
coarse sand 0.5 - 1
very coarse sand _ _ 1 - 2 90% — 35
very fine gravel 2 -4 80% - • III
fine gravel 4 - 6 — 30
fine gravel 6 - 8 r 70% -
medium gravel 8 - 11 III — 25 5
medium gravel 11 - 16 _ w 60% I III I I I II I II 0
coarse gravel 16 - 22 E. 50% — — 20 0
coarse gravel 22 - 32 L a
very coarse gravel 32 -45 _ a 40% - /
very coarse gravel 45 - 64 — 15 m.
small cobble 64 - 90 30% - - - c"
medium cobble 90 - 128 I — 10
-
large cobble 128 - 180 20% I I
very large cobble 180 -256 10% - — 5
small boulder 256 - 362 _
small boulder 362 - 512 0% I t 1 I i _i 0
medium boulder 512 - 1024 0.01 0.1 1 10 100 1000 10000
large boulder 1024 - 2048 particle size(mm)
very large boulder 2048 -4096 _
total particle count: 150
Size(mm) ' Size Distribution Type
bedrock D16 6.8 mean 14.0 silt/clay 0%
clay hardpan D35 13 dispersion 2.1 sand 10%
detritus/wood D50 17 skewness -0.10 gravel 88%
artificial D65 22 cobble 2%
total count: 150 D84 29 boulder 0%
D95 44
Note:

Appendix C-3: Sediment Data
A-OO11C Stream Relocation Design
Reference Reach 2 Pebble Count 1
Riffle Surface
Material Size Range(mm Count Riffle Surface Pebble Count, NC-69 Stream Relocation
silt/clay 0 - 0.062 _
very fine sand 0.062 0.125 —cumulative% cobble
fine sand 0.125 - 0.25
medium sand 0.25 - 0.5 _ 100% silt/clay sand gravel / .. obble boulder 25
coarse sand 0.5 - 1 _
very coarse sand 1 - 2 90% -
very fine gravel 2 -4 80% - — 20
fine gravel 4 - 6
fine gravel 6 - 8 2 70% -
medium gravel 8 - 11
° 3
medium gravel 11 - 16 60/° — 15 m
coarse gravel 16 - 22 _ 50%° o
—
coarse gravel 22 - 32 i 6
very coarse gravel 32 -45 sai 40% - — 10 a
very coarse gravel 45 - 64 i m
small cobble 64 - 90 30% - i I "'
medium cobble 90 - 128
large cobble 128 - 180 20% i i — 5
very large cobble 180 - 256 10% - - .
small boulder 256 - 362
small boulder 362 - 512 0% r' I 111 r 0
medium boulder 512 - 1024 0.01 0.1 1 10 100 1000 10000
large boulder 1024 - 2048 particle size(mm)
very large boulder 2048 -4096
total particle count: 150
Size(mm) ' Size Distribution Type
bedrock D16 4.6 mean 11.5 silt/clay 0%
clay hardpan D35 8.7 dispersion 2.5 sand 9%
detritus/wood D50 13 skewness -0.06 gravel 91
artificial D65 18 cobble 1%
total count: 150 D84 29 boulder 0%
D95 42
Note:

Appendix C-3: Sediment Data
A-OO11C Stream Relocation Design
Reference Reach 2 Pebble Count 2
Riffle Surface T
Material Size Range(mm Count Riffle Surface Pebble Count, NC-69 Stream Relocation
silt/clay 0 - 0.062
very fine sand 0.062 0.125 —cumulative% cobble
fine sand 0.125 - 0.25
medium sand 0.25 - 0.5 100% silt/clay sand gravel cobble boulder 35
coarse sand 0.5 - 1
-
very coarse sand 1 - 2 90%
very fine gravel 2 -4 80% -
fine gravel 4 - 6 _ c
fine gravel 6 - 8 —70% - — 2530 c
medium gravel 8 - 11 ' o
c 60/o - — 20 m
medium gravel 11 - 16 _
coarse gravel 16 - 22 _ le; 50% —
coarse gravel 22 - 32 2 40% — 15 w
-
very coarse gravel 32 -45 Q-
uery coarse gravel 45 - 64 30% - — 10
small cobble 64 - 90 20% -
medium cobble 90 - 128 — 5
large cobble 128 - 180 10% -
very large cobble 180 - 256 _ 0% I r fir- e 0
small boulder 256 - 362 0.01 0.1 1 10 100 1000 10000
small boulder 362 - 512 m
medium boulder 512 - 1024 particle size(mm)
large boulder 1024 - 2048
very large boulder 2048 -4096
total particle count: 150
Size(mm) Size Distribution Type
bedrock D16 8.5 3.4 mean 16.2 silt/clay 0%
clay hardpan D35 13 12 dispersion. 1.9 sand 4%
detritus/wood D50 16 17 skewness 0.01 gravel 95%
artificial I D65 21 20 cobble 1%
total count: 150 D84 31 29 boulder 0%
D95 50 39
Note:

Appendix C-3: Sediment Data
A-OO11C Stream Relocation Design
Reference Reach 2 Pebble Count 3
Bed Surface
Material Size Range(mrn Count Bed Surface Pebble Count, ---
silt/clay 0 - 0.062 _ —cumulative% cobble
very fine sand 0.062 - 0.125
fine sand 0.125 - 0.25
medium sand 0.25 0.5 100% silt/clay i sand gravel cobble boulder 45
coarse sand 0.5 - 1 _
very coarse sand 1 - 2 90% - — 40
very fine gravel 2 -4 80% - — 35
fine gravel 4 - 6 _
fine gravel 6 - 8 s 70% -
medium gravel 8 - 11 — 30
-
medium gravel 11 - 16 60%LF — 25 m
coarse gravel 16 - 22 c 50% — - o
coarse gravel 22 - 32 — 20 m
very coarse gravel 32 -45 _ c 40% -
very coarse gravel 45 - 64 i — 15 m
small cobble 64 - 90 30% - w
medium cobble 90 - 128 ° i — 10
-
large cobble 128 - 180 20/°
very large cobble 180 - 256 10% - — 5
small boulder 256 - 362
i
small boulder 362 - 512 0% ' r 0
medium boulder 512 - 1024 0.01 0.1 1 10 100 1000 10000
large boulder 1024 - 2048 - particle size(mm)
very large boulder 2048 -4096
total particle count: 150
Size(mm) ' Size Distribution Type
bedrock D16 5.4 mean 10.6 silt/clay 0%
clay hardpan D35 11 dispersion 2.0 sand 9%
detritus/wood D50 14 skewness -0.15 gravel 91%
artificial L D65 17 cobble 0%
total count: 150 D84 21 boulder 0%
D95 28
Note:

APPENDIX D:
H&H ANALYSIS

Drainage Area Map

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SCALE: 1'=500
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Drainage Area Map

StreamStats Report

StreamStats Report
Region ID: NC
Workspace ID: NC20180625195125076000
Clicked Point (Latitude, Longitude): 35.00641, -83.82633
Time: 2018-06-25 1 5:51 :42 -0400 l+
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Basin Characteristics
Parameter
Code Parameter Description Value Unit
DRNAREA Area that drains to a point on a stream 0.35 square
miles
PCTREG1 Percentage of drainage area located in Region 1 0 percent
PCTREG2 Percentage of drainage area located in Region 2 100 percent
PCTREG3 Percentage of drainage area located in Region 3 0 percent
PCTREG4 Percentage of drainage area located in Region 4 0 percent
PCTREG5 Percentage of drainage area located in Region 5 0 percent

Parameter
Code Parameter Description Value Unit
LC11IMP 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
LC01IMP Percent imperviousness of basin area 2001 NLCD 2.2 percent
LC01SHRUB 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
LCO1WETLND 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
LC06IMP 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 Parameter Description Value Unit
SSURGOC Percentage of area of Hydrologic Soil Type C from 0 percent
SSURGO
SSURGOD Percentage of area of Hydrologic Soil Type D from 0 percent
SSURGO
Urban Peak-Flow Statistics Parameters[Region 2 Urban Blue Ridge FS007-00]
Parameter Min Max
Code Parameter Name Value Units Limit Limit
DRNAREA Drainage Area 0.35 square 0.04 41
miles
LC11IMP Percent_Impervious_NLCD2011 3.04 percent 2 54.6
Urban Peak-Flow Statistics Flow Report[Region 2 Urban Blue Ridge FSOO7-00]
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)
Peak-Flow Statistics Parameters[Peak Southeast US overt sqmi 2009 5158]
Parameter Code Parameter Name Value Units Min Limit Max Limit

Parameter Code Parameter Name Value Units Min Limit Max Limit
DRNAREA Drainage Area 0.35 square miles 1 9000
PCTREG1 Percent Area in Region 1 0 percent 0 100
PCTREG2 Percent Area in Region 2 100 percent 0 100
PCTREG3 Percent Area in Region 3 0 percent 0 100
PCTREG4 Percent Area in Region 4 0 percent 0 100
PCTREG5 Percent Area in Region 5 0 percent 0 100
Peak-Flow Statistics Disclaimers[Peak Southeast US over 1 sqmi 2009 5158]
One or more of the parameters is outside the suggested range. Estimates were extrapolated with
unknown errors
Peak-Flow Statistics Flow Report[Peak Southeast US over 1 sqmi 2009 5158]
Statistic Value Unit
2 Year Peak Flood 48.4 ft^3/s
5 Year Peak Flood 95.2 ft^3/s
10 Year Peak Flood 133 ft^3/s
25 Year Peak Flood 186 ft^3/s
50 Year Peak Flood 225 ft"3/s
100 Year Peak Flood 272 ft"3/s
200 Year Peak Flood 314 ft^3/s
500 Year Peak Flood 379 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.Although these
data and associated metadata have been reviewed for accuracy and completeness and approved for
release by the U.S.Geological Survey(USGS),no warranty expressed or implied is made regarding the
display or utility of the data for other purposes, nor on all computer systems,nor shall the act of
distribution constitute any such warranty.

USGS Software Disclaimer:This software has been approved for release by the U.S.Geological Survey
(USGS).Although the software has been subjected to rigorous review,the USGS reserves the right to
update the software as needed pursuant to further analysis and review. No warranty,expressed or
implied,is made by the USGS or the U.S.Government as to the functionality of the software and related
material nor shall the fact of release constitute any such warranty. Furthermore,the software is released
on condition that neither the USGS nor the U.S.Government shall be held liable for any damages
resulting from its authorized or unauthorized use.
USGS Product Names Disclaimer:Any use of trade,firm,or product names is for descriptive purposes
only and does not imply endorsement by the U.S.Government.
Application Version:4.2.1

WinTR-55

WinTR-55 Current Data Description
--- Identification Data ---
User: JLE Date: 1/16/2019
Project: A-0011C Units: English
SubTitle: Hyatt Mill Creek Natural Channel Areal Units: Acres
State: North Carolina
County: Clay Valley NOAA
Filename: Y:\5961 NC NCDOT Div14\01 A-011C Stream Relocation\200 Disciplines\219 Water Resources\Hydrauli
--- 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: NOAAC
Dimensionless Unit Hydrograph: <standard>
WinTR-55, Version 1.00.10 Page 1 1/16/2019 12:08:16 PM

JLE A-0011C
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: NOAAC
Dimensionless Unit Hydrograph: <standard>
WinTR-55, Version 1.00.10 Page 1 1/16/2019 12:08:16 PM

JLE A-0011C
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-0011C
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
HyattMill HyattMill H
1940-
Legend
•
WS 100 year
x
WS 50 year
WS 25 year
•
1938- WS 10 year
WS 2 year
• -
WS Bankfull
•
Ground
Left Levee
•
1936- . Right Levee
x
1934- f �
c
1932 •
-
m
w
1930-
1928-
1926-
O o 0
co Lc) o In
Co N
O N M V L() CO I,- CO 0) O N N N M
N M •chI L O N- r 00 0) N N N NNNN
1924
0 100 200 300 400 500 600
Main Channel Distance(ft)

I HyattMill_NCDOT Plan: HyattMill_Existing 1/17/2019
River=HyattMill Reach=HyattMill RS=23
< .1 >c035+ .065
1948
= Legend
1946 WS 100 year
x
.--X-111
1944 WS 50 year
WS 25 year
c 1942- •
°
a5 = WS 10 year
1940-
WS 2 year
w
1938 : WS Bankfull
•
1936 Ground
•
Bank Sta
1934 1 1 1 I 1 1 1 1 I
0 50 100 150 200
Station(ft)
HyattMill_NCDOT Plan: HyattMill_Existing 1/17/2019
River= HyattMill Reach=HyattMill RS=22
< .1 +035<< .065 D
1946
- Legend
1944, WS 100▪ year
x
WS 50 year
1942-
WS 25 year
c •
o
•
1940- WS 10 year
°' - WS 2 year
w 1938-
WS Bankfull
1936- WV Ground
•
iir Bank Sta
1934
0 50 100 150 200
Station(ft)
HyattMill_NCDOT Plan: HyattMill_Existing 1/17/2019
River= HyattMill Reach=HyattMill RS=21
< .1 —+035< .065 H
1946-
Legend
1944- WS 100 year
x
1942 WS 50 year
WS 25 year
c 1940-
° = WS 10 year
a5
1938- WS 2 year
w = a ... .� .w1"7
1936 WS Bankfull
1934 Grou▪nd
•
Bank Sta
1932 i
0 50 100 150 200
Station(ft)

HyattMill_NCDOT Plan: HyattMill_Existing 1/17/2019
River=HyattMill Reach=HyattMill RS=20
-.1 ➢<.035D< .065
1946-
Legend
•
1944- WS 100 year
x
1942- WS 50 year
WS 25 year
c 1940- •
WS 10 year
• 1938=
w WS 2 year
1936 I WSt
•
1934 • Ground
•
Bank Sta
1932
0 50 100 150 200
Station(ft)
HyattMill_NCDOT Plan: HyattMill_Existing 1/17/2019
River=HyattMill Reach=HyattMill RS=19
.1 D<.035D< .065
1946-
Legend
•
1944= WS 100 year
x
1942 WS 50 year
WS 25 year
c 1940 •
-
° WS 10 year
• 1938= ■
WS 2 year
1936 - WS Bankfull
1934_ Ground
•
Bank Sta
1932
0 50 100 150 200
Station(ft)
HyattMill_NCDOT Plan: HyattMill_Existing 1/17/2019
River= HyattMill Reach=HyattMill RS=18
.1 -+.035)=< .065 -
1946
Legend
•
1944 WS 100 year
x
1942- WS 50 year
WS 25 year
c 1940 •
-
° WS 10 year
• 1938=
w WS 2 year
t
1936= WS Bankfull
■
1934- Ground
Bank Sta
1932
0 50 100 150 200
Station(ft)

HyattMill_NCDOT Plan: HyattMill_Existing 1/17/2019
River=HyattMill Reach=HyattMill RS= 17
J< —.1 D<.035)< .065
1946_
Legend
•
1944- WS 100 year
x
1942 WS 50 year
WS 25 year
c 1940 •
o WS 10 year
• 1938
w _ WS 2 year
t
1936 WS Bankfull
•
1934 Ground
• •
Bank Sta
1932
0 50 100 150 200
Station(ft)
HyattMill_NCDOT Plan: HyattMill_Existing 1/17/2019
River= HyattMill Reach=HyattMill RS= 16
.1 —+.035 .065 H
1944
Legend
1942 WS 100 year
x
1940 WS 50 year
WS 25 year
c 1938 •
o WS 10 year
'• 1936 WS 2 year
1934 WS Bankfull
•
1932 Ground
•
Bank Sta
1930 I
0 50 100 150 200
Station(ft)
HyattMill_NCDOT Plan: HyattMill_Existing 1/17/2019
River= HyattMill Reach=HyattMill RS=15
.1 —+.035D< .065—d
1944
Legend
1942- WS 100 year
x
1940- WS 50 year
WS 25 year
c 1938 •
-
o WS 10 year
'• 1936-
WS 2 year
1934- • 4. WS Bankfull
•
1932 Ground
•
Bank Sta
1930
0 50 100 150 200
Station(ft)

HyattMill_NCDOT Plan: HyattMill_Existing 1/17/2019
River=HyattMill Reach=HyattMill RS= 14
< .1 ➢<.035> .065
1944-
Legend
t
1942 WS 100 year
- x
WS 50 year
1940=
_ WS 25 year
•
O 1938_ WS 10 year
• 1936= WS_
w = fi WS Bankfull
•
1934 •
-
Ground
Ill
1932- Levee
•
Bank Sta
1930 1 1 1 1 I
0 50 100 150 200
Station(ft)
HyattMill_NCDOT Plan: HyattMill_Existing 1/17/2019
River= HyattMill Reach=HyattMill RS=13
< .1 .065
1944- 0 3 Legend
-
1942 �WS 100 year
x
1940- WS 50 year
WS 25 year
c 1938- •
o WS 10 year
2o> 1936-w Hior..15
WS 2 year
1934- WS Bankfull
•
1932 Ground
•
Bank Sta
1930 1 , , , ,
0 50 100 150 200 250
Station(ft)
HyattMill_NCDOT Plan: HyattMill_Existing 1/17/2019
River= HyattMill Reach=HyattMill RS=12
< .1 .065
1942= 0 Legend
- 3
•
1940- 5
WS 100 year
x
1938- WS 50 year
WS 25 year
c 1936 •
-
°
co = WS 10 year
1934= 41iricr
w WS 2 year
t
1932- WS Bankfull
1930 Ground
•
Bank Sta
1928 1
0 50 100 150 200 250
Station(ft)

HyattMill_NCDOT Plan: HyattMill_Existing 1/17/2019
River=HyattMill Reach=HyattMill RS= 11
.1 H . H .065 H
1942 3 3 Legend
•
1940 5
WS 100 year
x
1938 WS 50 year
WS 25 year
c 1936 •
° WS 10 year
1934
WS 2 year
1932 WS Bankfull
•
1930 Ground
•
Bank Sta
1928
0 50 100 150 200 250
Station(ft)
HyattMill_NCDOT Plan: HyattMill_Existing 1/17/2019
River= HyattMill Reach=HyattMill RS=10
.065 .065 H
1942= 0 3 Legend
•
1940- 5
WS 100 year
x
1938 WS 50 year
WS 25 year
c 1:zI
•
° WS 10 year
•
1
WS 2 year
1932 WS Bankfull
•
1930 Ground
•
- Bank Sta
1928
0 50 100 150 200 250
Station(ft)
HyattMill_NCDOT Plan: HyattMill_Existing 1/17/2019
River=HyattMill Reach=HyattMill RS=9
1942 .065 H O H.065 H
3 Legend
•
1940 5
WS 100 year
x
1938 WS 50 year
WS 25 year
c 1:zI
•
° WS 10 year
1
WS 2 year
1932 WS Bankfull
•
1930 Ground
•
Bank Sta
1928
0 50 100 150 200 250
Station(ft)

HyattMill_NCDOT Plan: HyattMill_Existing 1/17/2019
River=HyattMill Reach=HyattMill RS=8
< .065 )1 . H.065 H
1942= 3 3 Legend
1940- 5
WS 100 year
- x
1938 WS 50 year
/( WS 25 year
c 1936
WSWSGround2••10 year
o
uw 1934= i `�
H �
1932- WS Bankfull
1930- year
Bank Sta
1928 1
0 50 100 150 200 250
Station(ft)
HyattMill_NCDOT Plan: HyattMill_Existing 1/17/2019
River=HyattMill Reach=HyattMill RS=7.5 Culv
< .065 . if.065 H
1942- 3 3 Legend
5 �1940
WS 100 year
x
1938 WS 50 year
WS 25 year
c 1936 •
o
- WS 10 year
.....
e> 1934= 1r- - / WS 2 year
w
1932 WS Bankfull
•
1930 Ground
•
Bank Sta
1928 1
0 50 100 150 200 250
Station(ft)
HyattMill_NCDOT Plan: HyattMill_Existing 1/17/2019
River=HyattMill Reach=HyattMill RS=7.5 Culv
< .065 .3 H.065—H
1942-
3 Legend
1940- 5 •
WS 100 year
x
1938- WS 50 year
1936- WS 25 year
c •
o
1934- WS 10 year
w 1932- WS 2 year
t
1930 WS Bankfull
■
Ground
1928- •
Bank Sta
1926
0 50 100 150 200 250 300
Station(ft)

HyattMill_NCDOT Plan: HyattMill_Existing 1/17/2019
River=HyattMill Reach=HyattMill RS=7
< .065 . H.065 H
1940- 3 3 Legend
1938- 5
WS 100 year
x
1936- z WS 50 year
WS 25 year
J
c 1934-
o WS 10 year
o
aa)• 1932= ._. WS 2 year
w
1930 WS Bankfull t
1928- Ground
•
Bank Sta
1926 1 1 i
0 50 100 150 200 250 300
Station(ft)
HyattMill_NCDOT Plan: HyattMill_Existing 1/17/2019
River=HyattMill Reach=HyattMill RS=6
< .065 —d . < .065 H
1940= 3 3 Legend
•
1938- 5
WS 100 year
x
1936 WS 50 year
WS 25 year
c 1934
o WS 10 year
o
1932=
w + • ei/ WS 2 year
1930 WS Bankfull
•
1928- Ground
•
Bank Sta
1926
0 50 100 150 200 250 300
Station(ft)
HyattMill_NCDOT Plan: HyattMill_Existing 1/17/2019
River=HyattMill Reach=HyattMill RS=5
.065 H . K .065-H
1938 3 3 Legend
5 ■
1936 WS 100 year
x
WS 50 year
1934
WS 25 year
c •
o
1932 WS 10 year
>
N WS 2 year
w 1930 — .�.R IiMilir
t
WS Bankfull
1928- Ground
I •
Bank Sta
1926
0 50 100 150 200 250 300
Station(ft)

HyattMill_NCDOT Plan: HyattMill_Existing 1/17/2019
River=HyattMill Reach=HyattMill RS=4
< .065 H . .065
1936= 0 Legend
5 3 ■
1934- WS 100 year
m'.----m---..---.--" ?"
x
r
WS 50 year
1932 Am . WS
c
o
5
1930= r`___ WS 10year
w WS 2 year
1928-
WS Bankfull
•
1926- Ground
•
Bank Sta
1924 1 1
0 50 100 150 200 250 300
Station(ft)
HyattMill_NCDOT Plan: HyattMill_Existing 1/17/2019
River=HyattMill Reach=HyattMill RS=3
< .065 >1 . <—.065—>
1936- 0 3 Legend
5 ■
1934- WS 100 year
x
WS 50 year
1932-
qc WS 25 year
c ♦
o
• 1930= •• •■ •-.., ; WS 10 year
0 - WS 2 year
w 1928-
t
WS Bankfull
•
1926- Ground
•
Bank Sta
1924
0 50 100 150 200 250 300
Station(ft)
HyattMill_NCDOT Plan: HyattMill_Existing 1/17/2019
River=HyattMill Reach=HyattMill RS=2
< .065 H . H—.065—>
1934- 0 Legend
5 ■
1932 WS 100 year
vel
x
••�; WS 50 year
c •
1930_ • •�._�� WS 2 year
o '`y■ � $ WS 10 year
m
N• 1928- 3 WS 2 year
w
t
WS Bankfull
1926- •
Ground
•
Bank Sta
1924 1 i i 1 1 i i 1 i 1 1 i
0 50 100 150 200 250 300
Station(ft)

HyattMill_NCDOT Plan: HyattMill_Existing 1/17/2019
River=HyattMill Reach=HyattMill RS= 1
.065 . H.065
1934- 0 3 Legend
•
5 WS 100 year
1932- x
■-■ ■ WS 50 year
— 1930- WS 25 year
•
° WS 10 year
> •
1928- WS 2 year
•
WS Bankfull
•
1926- Ground
•
Bank Sta
1924
0 50 100 150 200 250
Station(ft)

HEC-RAS Plan:EX River:HyattMill Reach:HyattMill
Reach River Ste Profile Q Total Min Ch El W.S.Elev Crit W.S. E.G.Elev E.G.Slope Vel Chnl Flow Area Top Width Fronde#Chl Shear Chan
(cfs) (ft) (ft) (ft) (ft) (ft/ft) (ft/s) (sq ft) (ft) (lb/sq ft)
HyattMill 23 2 year 91.27 1934.36 1936.62 1936.11 1936.93 0.006345 4.50 20.63 14.90 0.61 0.61
HyattMill 23 10 year 234.47 1934.36 1937.76 1937.29 1938.40 0.006821 6.57 45.19 25.62 0.68 1.09
HyattMill 23 25 year 336.96 1934.36 1938.29 1937.92 1939.13 0.007417 7.68 59.34 28.08 0.73 1.41
HyattMill 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
HyattMill 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
HyattMill 23 Bankfull 39.00 1934.36 1935.85 1935.48 1936.03 0.006457 3.39 11.50 10.68 0.58 0.40
HyattMill 22 2 year 91.27 1934.09 1935.99 1935.99 1936.65 0.019256 6.49 14.06 10.70 1.00 1.39
HyattMill 22 10 year 234.47 1934.09 1937.22 1937.22 1938.15 0.012398 7.97 38.21 27.44 0.89 1.69
HyattMill 22 25 year 336.96 1934.09 1937.58 1937.99 1938.83 0.014693 9.48 55.79 64.19 0.99 2.30
HyattMill 22 50 year 423.99 1934.09 1937.73 1938.18 1939.31 0.018126 10.89 65.38 66.05 1.11 2.98
HyattMill 22 100 year 517.93 1934.09 1937.88 1938.57 1939.77 0.021151 12.15 75.27 67.91 1.21 3.65
HyattMill 22 Bankfull 39.00 1934.09 1935.31 1935.31 1935.74 0.021522 5.25 7.43 8.62 1.00 1.04
HyattMill 21 2 year 91.27 1932.89 1934.86 1935.26 1936.19 0.042766 9.26 9.86 7.75 1.45 2.89
HyattMill 21 10 year 234.47 1932.89 1936.26 1936.75 1937.85 0.028023 10.12 23.27 13.59 1.25 2.97
HyattMill 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
HyattMill 21 50 year 423.99 1932.89 1937.24 1937.90 1939.08 0.020962 11.35 56.16 63.47 1.15 3.29
HyattMill 21 100 year 517.93 1932.89 1937.43 1938.16 1939.51 0.022875 12.37 69.17 69.16 1.21 3.82
HyattMill 21 Bankfull 39.00 1932.89 1934.15 1934.46 1935.16 0.060518 8.06 4.84 6.41 1.64 2.56
HyattMill 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
HyattMill 20 10 year 234.47 1933.12 1935.74 1936.06 1937.02 0.024646 9.07 26.08 23.64 1.22 2.44
HyattMill 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
HyattMill 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
HyattMill 20 100 year 517.93 1933.12 1936.58 1937.31 1938.80 0.027023 12.41 59.42 63.91 1.37 4.00
HyattMill 20 Bankfull 39.00 1933.12 1934.37 1934.30 1934.70 0.016424 4.66 8.36 10.11 0.90 0.81
HyattMill 19 2 year 91.27 1932.82 1934.78 1934.78 1935.38 0.018138 6.24 14.63 12.03 1.00 1.29
HyattMill 19 10 year 234.47 1932.82 1935.77 1935.92 1936.80 0.017431 8.19 30.63 23.99 1.05 1.92
HyattMill 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
HyattMill 19 50 year 423.99 1932.82 1936.30 1936.89 1938.06 0.022388 10.96 52.39 59.87 1.24 3.17
HyattMill 19 100 year 517.93 1932.82 1936.50 1937.14 1938.49 0.023841 11.89 64.13 62.29 1.29 3.64
HyattMill 19 Bankfull 39.00 1932.82 1934.23 1934.12 1934.55 0.014022 4.49 8.69 9.75 0.84 0.74
HyattMill 18 2 year 91.27 1932.60 1934.23 1934.16 1934.71 0.014885 5.53 16.52 14.19 0.90 1.02
HyattMill 18 10 year 234.47 1932.60 1934.91 1935.34 1936.12 0.022289 8.84 27.11 21.63 1.17 2.29
HyattMill 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
HyattMill 18 50 year 423.99 1932.60 1935.53 1936.11 1937.29 0.023177 11.02 52.82 56.28 1.25 3.22
HyattMill 18 100 year 517.93 1932.60 1935.75 1936.37 1937.66 0.023477 11.75 65.24 58.45 1.28 3.56
HyattMill 18 Bankfull 39.00 1932.60 1933.64 1933.64 1933.97 0.020886 4.60 8.48 12.73 0.99 0.85
HyattMill 17 2 year 91.27 1932.08 1934.24 1933.87 1934.58 0.008222 4.68 19.51 13.31 0.68 0.69
HyattMill 17 10 year 234.47 1932.08 1934.76 1935.19 1935.94 0.020203 8.76 28.35 26.92 1.11 2.21
HyattMill 17 25 year 336.96 1932.08 1935.17 1935.66 1936.65 0.020280 9.98 43.70 52.31 1.15 2.69
HyattMill 17 50 year 423.99 1932.08 1935.36 1935.94 1937.12 0.022427 11.08 54.36 55.10 1.23 3.22
HyattMill 17 100 year 517.93 1932.08 1935.59 1936.21 1937.48 0.022777 11.81 66.83 57.33 1.26 3.56
HyattMill 17 Bankfull 39.00 1932.08 1933.57 1933.27 1933.76 0.007687 3.51 11.10 11.35 0.63 0.44
HyattMill 16 2 year 91.27 1931.66 1933.67 1933.62 1934.18 0.016749 5.76 15.85 13.69 0.94 1.12
HyattMill 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
HyattMill 16 25 year 336.96 1931.66 1934.97 1935.21 1935.94 0.014332 8.32 57.78 56.04 0.98 1.87
HyattMill 16 50 year 423.99 1931.66 1935.18 1935.50 1936.31 0.015447 9.17 70.23 61.70 1.03 2.21
HyattMill 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
HyattMill 16 Bankfull 39.00 1931.66 1933.01 1932.96 1933.37 0.017768 4.77 8.18 9.78 0.92 0.86
HyattMill 15 2 year 91.27 1930.56 1933.74 1932.94 1933.98 0.004531 3.88 23.55 14.23 0.50 0.45
HyattMill 15 10 year 234.47 1930.56 1934.07 1934.41 1935.16 0.017205 8.42 30.94 40.94 1.00 2.00
HyattMill 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
HyattMill 15 50 year 423.99 1930.56 1934.83 1935.19 1936.07 0.015266 9.67 70.78 60.68 0.99 2.39
HyattMill 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
HyattMill 15 Bankfull 39.00 1930.56 1933.11 1932.28 1933.20 0.002493 2.44 16.01 11.18 0.36 0.19
HyattMill 14 2 year 91.27 1930.30 1933.59 1933.03 1933.82 0.005904 4.00 29.42 32.71 0.54 0.50
HyattMill 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
HyattMill 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
HyattMill 14 50 year 423.99 1930.30 1934.95 1934.67 1935.43 0.007885 6.85 115.31 68.42 0.69 1.20
HyattMill 14 100 year 517.93 1930.30 1935.24 1934.89 1935.75 0.007773 7.22 135.27 70.83 0.70 1.30
HyattMill 14 Bankfull 39.00 1930.30 1932.99 1932.32 1933.11 0.004233 2.73 14.57 15.73 0.43 0.26
HyattMill 13 2 year 91.27 1930.76 1933.35 1933.35 1933.70 0.011730 4.98 26.48 51.49 0.75 0.83
HyattMill 13 10 year 234.47 1930.76 1934.14 1933.98 1934.49 0.008620 5.78 74.70 66.62 0.70 0.96
HyattMill 13 25 year 336.96 1930.76 1934.59 1934.27 1934.94 0.007261 6.03 105.86 70.48 0.66 0.98
HyattMill 13 50 year 423.99 1930.76 1934.95 1934.47 1935.30 0.006473 6.20 131.30 73.49 0.64 0.99
HyattMill 13 100 year 517.93 1930.76 1935.24 1934.67 1935.62 0.006397 6.56 152.94 75.98 0.64 1.07
HyattMill 13 Bankfull 39.00 1930.76 1932.58 1932.58 1932.97 0.025706 5.00 7.80 10.03 1.00 1.01
HyattMill 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
HyattMill 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
HyattMill 12 25 year 336.96 1929.96 1934.05 1933.94 1934.68 0.008639 7.44 76.39 56.57 0.75 1.40
HyattMill 12 50 year 423.99 1929.96 1934.23 1934.23 1935.01 0.010352 8.46 87.66 67.58 0.83 1.77
HyattMill 12 100 year 517.93 1929.96 1934.53 1934.53 1935.34 0.009998 8.83 109.02 73.39 0.83 1.87
HyattMill 12 Bankfull 39.00 1929.96 1932.13 1931.52 1932.29 0.004835 3.30 11.83 8.81 0.50 0.36

HEC-RAS Plan:EX River:HyattMill Reach:HyattMill(Continued)
Reach River Ste Profile Q Total Min Ch El W.S.Elev Crit W.S. E.G.Elev E.G.Slope Vel Chnl Flow Area Top Width Froude#Chl Shear Chan
(cfs) (ft) (ft) (ft) (ft) (ft/ft) (ft/s) (sq ft) (ft) (lb/sq ft)
HyattMill 11 2 year 91.27 1929.46 1933.25 1931.88 1933.35 0.001623 2.90 61.15 84.23 0.31 0.22
HyattMill 11 10 year 234.47 1929.46 1934.00 1933.36 1934.18 0.002680 4.37 140.53 131.41 0.41 0.47
HyattMill 11 25 year 336.96 1929.46 1934.21 1933.75 1934.46 0.003782 5.39 168.38 133.97 0.49 0.70
HyattMill 11 50 year 423.99 1929.46 1934.44 1934.06 1934.72 0.004035 5.80 200.35 136.63 0.51 0.79
HyattMill 11 100 year 517.93 1929.46 1934.64 1934.24 1934.94 0.004463 6.30 227.15 138.81 0.54 0.92
HyattMill 11 Bankfull 39.00 1929.46 1932.10 1931.09 1932.21 0.002482 2.63 14.83 8.63 0.35 0.21
HyattMill 10 2 year 91.27 1929.56 1933.26 1932.51 1933.31 0.000994 2.28 96.85 110.26 0.24 0.14
HyattMill 10 10 year 234.47 1929.56 1934.05 1933.21 1934.10 0.001195 2.93 195.64 138.14 0.27 0.21
HyattMill 10 25 year 336.96 1929.56 1934.28 1933.40 1934.35 0.001619 3.56 228.21 142.19 0.32 0.30
HyattMill 10 50 year 423.99 1929.56 1934.52 1933.56 1934.60 0.001733 3.83 262.72 146.28 0.33 0.34
HyattMill 10 100 year 517.93 1929.56 1934.72 1933.74 1934.81 0.001914 4.15 292.69 150.00 0.35 0.40
HyattMill 10 Bankfull 39.00 1929.56 1931.93 1931.20 1932.13 0.005285 3.59 11.17 8.86 0.49 0.41
HyattMill 9 2 year 91.27 1929.65 1933.26 1932.23 1933.30 0.000715 2.13 106.81 104.90 0.21 0.11
HyattMill 9 10 year 234.47 1929.65 1934.04 1933.04 1934.09 0.001058 3.00 201.00 136.47 0.27 0.21
HyattMill 9 25 year 336.96 1929.65 1934.26 1933.31 1934.34 0.001476 3.68 232.34 140.35 0.32 0.31
HyattMill 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
HyattMill 9 100 year 517.93 1929.65 1934.70 1933.65 1934.80 0.001799 4.34 295.11 147.64 0.36 0.42
HyattMill 9 Bankfull 39.00 1929.65 1931.92 1931.12 1932.07 0.003383 3.21 15.57 24.82 0.42 0.31
HyattMill 8 2 year 91.27 1929.50 1933.25 1931.37 1933.28 0.000417 1.85 109.87 92.83 0.18 0.08
HyattMill 8 10 year 234.47 1929.50 1934.00 1932.79 1934.07 0.000857 3.02 193.40 130.32 0.26 0.20
HyattMill 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
HyattMill 8 50 year 423.99 1929.50 1934.42 1933.28 1934.55 0.001507 4.28 250.60 142.25 0.35 0.39
HyattMill 8 100 year 517.93 1929.50 1934.60 1933.63 1934.75 0.001752 4.73 277.10 146.96 0.38 0.48
HyattMill 8 Bankfull 39.00 1929.50 1931.94 1930.68 1932.01 0.000972 2.04 22.32 25.02 0.25 0.12
HyattMill 7.5 Culvert
HyattMill 7 2 year 91.27 1927.98 1929.93 1929.93 1930.49 0.017869 6.00 15.21 13.34 0.99 1.21
HyattMill 7 10 year 234.47 1927.98 1931.46 1931.25 1931.89 0.005368 5.56 65.43 87.56 0.62 0.80
HyattMill 7 25 year 336.96 1927.98 1931.73 1931.73 1932.28 0.006496 6.55 91.60 103.13 0.69 1.07
HyattMill 7 50 year 423.99 1927.98 1931.95 1931.95 1932.53 0.006763 7.03 115.00 110.41 0.71 1.21
HyattMill 7 100 year 517.93 1927.98 1932.18 1932.18 1932.78 0.006747 7.38 142.28 123.46 0.72 1.30
HyattMill 7 Bankfull 39.00 1927.98 1929.33 1929.33 1929.70 0.020162 4.89 7.98 10.54 0.99 0.92
HyattMill 6 2 year 91.27 1927.54 1929.44 1929.56 1930.18 0.023970 6.86 13.30 11.70 1.14 1.60
HyattMill 6 10 year 234.47 1927.54 1930.79 1930.79 1931.67 0.010702 7.63 36.36 44.40 0.86 1.53
HyattMill 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
HyattMill 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
HyattMill 6 100 year 517.93 1927.54 1931.78 1932.00 1932.62 0.008888 8.71 128.51 126.71 0.83 1.78
HyattMill 6 Bankfull 39.00 1927.54 1928.78 1928.89 1929.33 0.030324 5.93 6.57 8.69 1.20 1.36
HyattMill 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
HyattMill 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
HyattMill 5 25 year 336.96 1926.28 1929.88 1930.53 1931.17 0.013985 9.74 48.20 31.13 0.97 2.36
HyattMill 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
HyattMill 5 100 year 517.93 1926.28 1930.59 1930.94 1931.74 0.011315 10.06 110.60 137.99 0.91 2.35
HyattMill 5 Bankfull 39.00 1926.28 1927.66 1927.44 1927.95 0.010823 4.29 9.09 8.41 0.73 0.65
HyattMill 4 2 year 91.27 1925.60 1928.02 1927.89 1928.49 0.013880 5.53 16.78 15.06 0.85 1.01
HyattMill 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
HyattMill 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
HyattMill 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
HyattMill 4 100 year 517.93 1925.60 1929.86 1930.46 1931.27 0.015820 10.56 91.42 115.30 1.05 2.75
HyattMill 4 Bankfull 39.00 1925.60 1927.04 1926.94 1927.49 0.017211 5.35 7.29 6.36 0.88 1.01
HyattMill 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
HyattMill 3 10 year 234.47 1925.40 1928.64 1928.78 1929.64 0.015803 8.27 34.26 26.19 0.98 1.90
HyattMill 3 25 year 336.96 1925.40 1929.12 1929.57 1930.30 0.015245 9.25 54.79 61.88 1.00 2.23
HyattMill 3 50 year 423.99 1925.40 1929.24 1929.92 1930.79 0.019362 10.74 62.65 66.67 1.13 2.96
HyattMill 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
HyattMill 3 Bankfull 39.00 1925.40 1926.71 1926.71 1927.23 0.021340 5.77 6.75 6.47 1.00 1.20
HyattMill 2 2 year 91.27 1924.98 1926.73 1927.00 1927.88 0.034317 8.59 10.62 7.93 1.31 2.45
HyattMill 2 10 year 234.47 1924.98 1928.46 1928.73 1929.47 0.011298 8.55 42.25 49.78 0.86 1.84
HyattMill 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
HyattMill 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
HyattMill 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
HyattMill 2 Bankfull 39.00 1924.98 1926.00 1926.24 1926.84 0.045528 7.33 5.32 6.57 1.44 2.07
HyattMill 1 2 year 91.27 1924.74 1926.28 1926.61 1927.48 0.038858 8.79 10.39 8.51 1.40 2.61
HyattMill 1 10 year 234.47 1924.74 1927.56 1928.09 1929.23 0.022031 10.57 25.56 17.88 1.18 2.99
HyattMill 1 25 year 336.96 1924.74 1928.39 1928.78 1929.92 0.014740 10.49 49.76 51.27 1.02 2.67
HyattMill 1 50 year 423.99 1924.74 1928.63 1929.50 1930.35 0.016082 11.48 62.93 56.98 1.07 3.13
HyattMill 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
HyattMill 1 Bankfull 39.00 1924.74 1925.76 1925.89 1926.37 0.031543 6.25 6.24 7.58 1.22 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) (ft) (ft) (ft) (ft) (cfs) (cfs) (cfs) (ft)
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 91.27 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 1937.24 1.84 0.67 0.02 19.18 388.23 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 3.29 326.20 7.47 49.86
HyattMill 18 50 year 1937.29 1935.53 1.76 0.18 0.00 6.81 394.46 22.71 56.28
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) (ft) (ft) (ft) (ft) (cfs) (cfs) (cfs) (ft)
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 17.03 320.23 180.67 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 0.28 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 1934.28 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 47.34 144.21
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) (ft) (ft) (ft) (ft) (cfs) (cfs) (cfs) (ft)
HyattMill 4 10 year 1929.85 1928.92 0.93 0.20 0.01 6.28 220.76 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 1928.25 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
HyattMill HyattMill >
1940-
Legend
•
WS 100 year
x
WS 50 year
WS 25 year
•
1938- WS 10 year
WS 2 year
WS Bankfull
■
Ground
1936-
1934-
■
1932 co
m
w
1930-
1928x
T �
1926-
o O O O
o 1.0 CO L
lf) N M In � O CO L 0 LO
O O N N M M co CO n OD CO O O O O (N N N M
N M co n n n OD O . . . . . N N N N N N N
1924
0 100 200 300 400 500 600 700
Main Channel Distance(ft)

HyattMill_NCDOT Plan: HyattMill_Proposed 1/17/2019
River=HyattMill Reach=HyattMill RS=23
< .1 . < .065
1950 0
3 Legend
1948 5 WS 100 year
x
1946- WS 50 year
1944- WS 25 year
c •
° 1942- WS 10 year
a5
w 1940 WS 2 year
t
WS Bankfull
1938- 1 ■
I Ground
1936- •
• Bank Sta
1934 l i l I 1 i
0 50 100 150 200
Station(ft)
HyattMill_NCDOT Plan: HyattMill_Proposed 1/17/2019
River= HyattMill Reach=HyattMill RS=22.1
< .1 H 0. < .065 —>
1950
3 Legend
1948- 5 ---------■—•`— ■
WS 100 year
1946- x
WS 50 year
1944-
qc WS 25 year
0 1942- •
WS 10 year
> 1940-
w WS 2 year
1938- ■
I WS Bankfull
1936- ■
• Ground
1934- •
Bank Sta
1932 1 i 1 i
0 50 100 150 200
Station(ft)
HyattMill_NCDOT Plan: HyattMill_Proposed 1/17/2019
River= HyattMill Reach=HyattMill RS=22
< .1 -c0351<— .065
1950-
Legend
1948
•--------; WS 100 year
1946- x
WS 50 year
1944 qc WS
25 year
0 1942 •
■ WS 10 year
> 1940-
w WS 2 year
1938-
I WS Bankfull
1936- ■
• Ground
1934- •
Bank Sta
1932 i
0 50 100 150 200
Station(ft)

HyattMill_NCDOT Plan: HyattMill_Proposed 1/17/2019
River=HyattMill Reach=HyattMill RS=21
< .1 H 0. < .065 H
1950-
3 Legend
•
1948 5 WS 100 year
1946- x
WS 50 year
1944, ti WS
25 year
g 1942- •
WS 10 year
> 1940-
m WS 2 year
w 1938-
Z WS Bankfull
1936- ■
Ground
1934- •
Bank Sta
1932 1 i 1 1
0 50 100 150 200
Station(ft)
HyattMill_NCDOT Plan: HyattMill_Proposed 1/17/2019
River= HyattMill Reach=HyattMill RS=20.1
< .1 = . 1, .065
1950- 0 3 Legend
-
•
1948 5 • 1 Fur•a. WS 100 year
1946- x
WS 50 year
1944-
WS 25 year
g 1942- •
WS 10 year
> 1940-
m WS 2 year
w 1938
t
0 WS Bankfull
1936- • ■
Ground
1934- •
Bank Sta
1932 1 i 1 I 1
0 50 100 150 200
Station(ft)
HyattMill_NCDOT Plan: HyattMill_Proposed 1/17/2019
River= HyattMill Reach=HyattMill RS=20
< .1 035< .065 H
1948-
% ..1"" Legend
1946 •
-
WS 100 year
x
1944 . WS 50 year
1942- WS 25 year
c - •
o
1940- WS 10 year
>
w 1938 WS 2 year
WS Bankfull
1936- z
■
Ground
1934- •
Bank Sta
1932 1 1 I 1 I 1
0 50 100 150 200
Station(ft)

HyattMill_NCDOT Plan: HyattMill_Proposed 1/17/2019
River=HyattMill Reach=HyattMill RS= 19.1
< .1 . < .065
1948 0
3 _i e.■ Legend
1946- 5 '
WS 100 year
x
1944- WS 50 year
• 1942- WS 25 year
c •
o
1940- WS 10 year
w 1938 WS 2 year
t
1936 WS Bankfull
■
Ground
1934- •
Bank Sta
1932 1 1 1
0 50 100 150 200
Station(ft)
HyattMill_NCDOT Plan: HyattMill_Proposed 1/17/2019
River=HyattMill Reach=HyattMill RS= 18.1
< .1 )1 0. < .065 H
1948-
3 Legend
-
1946- 5 'HOW" '
WS 100 year
x
1944- WS 50 year
• 1942- WS 25 year
c •
o
1940- WS 10 year
w 1938- WS 2 year
t
1936 WS Bankfull
\10:: ■
■ Ground
1934- •
Bank Sta
1932 1 1 1 1 1
0 50 100 150 200
Station(ft)
HyattMill_NCDOT Plan: HyattMill_Proposed 1/17/2019
River=HyattMill Reach=HyattMill RS= 18
< .1 -?039<— .065 —>
1948-
Legend
1946 ■ •
WS 100 year
1944- x
WS 50 year
1942
- WS 25 year
g 1940 •
WS 10 year
> 1938
m WS 2 year
w 1936 I 21\
WS Bankfull
1934 ...Fir •
Ground
1932 •
Bank Sta
1930 1
0 50 100 150 200
Station(ft)

HyattMill_NCDOT Plan: HyattMill_Proposed 1/17/2019
River=HyattMill Reach=HyattMill RS= 17
J< .1 )1 . < .065
1948 o 3 Legend
5 • %_. •
1946- ■- Z.--.-. WS 100 year
x
1944- WS 50 year
• 1942 WS 25 year
c A
o
- 1940 WS 10 year
>
w 1938 WS 2 year
t
1936 WS Bankfull
7 ■
A Ground
1934- •
w Bank Sta
1932 1 1 1 1
0 50 100 150 200
Station(ft)
HyattMill_NCDOT Plan: HyattMill_Proposed 1/17/2019
River= HyattMill Reach=HyattMill RS= 16.1
< .1 .065 H
1948 3 3 Legend
-
•
1946- 5 ■d"—.. WS 100 year
1944- x
WS 50 year
1942-
WS 25 year
g 1940- A
WS 10 year
>- 1938-
m WS 2 year
w 1936-
. WS Bankfull
1934- ' ■
.• �" Ground
1932- �.� •
Bank Sta
1930 1 1 I 1
0 50 100 150 200
Station(ft)
HyattMill_NCDOT Plan: HyattMill_Proposed 1/17/2019
River=HyattMill Reach=HyattMill RS= 16
< .1 >?0359< .065
1946-
-ft Legend
1944- ■
WS 100 year
1942- WS 50 year
• 1940- WS 25 year
c - •
g 1938- WS 10 year
co
>
w 1936 WS 2 year
1934 WS Bankfull
•
Ground
1932- •
Bank Sta
1930 1 1
0 50 100 150 200
Station(ft)

HyattMill_NCDOT Plan: HyattMill_Proposed 1/17/2019
River=HyattMill Reach=HyattMill RS= 15
< .1 •
< 065
1946- 0 Legend
1944- 5 •
WS 100 year
x
1942 WS 50 year
• 1940- il" WS 25 year
c •
o
- 1938- WS 10 year
w 1936- WS 2 year
t
1934- Z WS Bankfull
■
Ground
1932- •
Bank Sta
1930 1 i 1 1
0 50 100 150 200
Station(ft)
HyattMill_NCDOT Plan: HyattMill_Proposed 1/17/2019
River=HyattMill Reach=HyattMill RS=14.1
< .1 < .065
1946 0
3 ■ — _• Legend
1944- 5 —���� •
WS 100 year
x
1942- WS 50 year
• 1940- WS 25 year
c •
o
- 1938- WS 10 year
w 1936 WS 2 year
t
1934 WS Bankfull
•
Ground
1932- •
Bank Sta
1930 1
0 50 100 150 200
Station(ft)
HyattMill_NCDOT Plan: HyattMill_Proposed 1/17/2019
River= HyattMill Reach=HyattMill RS= 14
< .1 03 .065
1946
Legend
1944- Few' ■
WS 100 year
1942-.%\ x
WS 50 year
1940-
WS 25 year
g 1938- •
WS 10 year
> 1936-
w • •--• j. Tr" WS 2 year
1934- g
WS Bankfull
1932- ■
Ground
1930- •
Bank Sta
1928 1 i 1 i 1
0 50 100 150 200
Station(ft)

HyattMill_NCDOT Plan: HyattMill_Proposed 1/17/2019
River=HyattMill Reach=HyattMill RS= 13
.1 . < .065
1946 0
3 Legend
1944- 5 •
WS 100 year
1942- WS 50 year
• 1940- WS 25 year
•
- 1938- WS 10 year
w 1936 WS 2 year
t
1934 WS Bankfull
•
Ground
1932- •
Bank Sta
1930
0 50 100 150 200 250
Station(ft)
HyattMill_NCDOT Plan: HyattMill_Proposed 1/17/2019
River= HyattMill Reach=HyattMill RS= 12.1
.1 H . H .065
1946 0 3 Legend
-
1944- 5 •
WS 100 year
1942- WS 50 year
• 1940- WS 25 year
•
- 1938- WS 10 year
w 1936 WS 2 year
t
1934 WS Bankfull
■
• Ground
1932- •
Bank Sta
1930
0 50 100 150 200 250
Station(ft)
HyattMill_NCDOT Plan: HyattMill_Proposed 1/17/2019
River= HyattMill Reach=HyattMill RS= 12
.1 .065
1946 3 3 Legend
-
•
1944 5 WS 100 year
1942-
WS 50 year
1940-
WS 25 year
g 1938- •
WS 10 year
> 1936-
m WS 2 year
w 1934-
t
WS Bankfull
1932- ■
Ground
1930- •
Bank Sta
1928
0 50 100 150 200 250
Station(ft)

HyattMill_NCDOT Plan: HyattMill_Proposed 1/17/2019
River=HyattMill Reach=HyattMill RS= 11
< 1 ➢ .065
1944= 0 3 Legend
•
1942 5
WS 100 year
x
1940 WS 50 year
WS 25 year
c 1938 •
o
WS 10 year
co
a>, 1936
w WS 2 year
t
1934 WS Bankfull
S ■
1932 z Ground
•
Bank Sta
1930 1 , , , 1 ,
0 50 100 150 200 250
Station(ft)
HyattMill_NCDOT Plan: HyattMill_Proposed 1/17/2019
River= HyattMill Reach=HyattMill RS= 10.1
< .065 ,( .065 f
1944- 0 3 Legend
-
1942- 5 •
WS 100 year
x
1940 WS 50 year
• 1938- WS 25 year
c •
o
1936 WS 10 year
>
w 1934 WS 2 year
Z WSt
1932- \--.- . - ■
Ground
1930- 0
Bank Sta
1928 1 , , 1 , ,
0 50 100 150 200 250
Station(ft)
HyattMill_NCDOT Plan: HyattMill_Proposed 1/17/2019
River= HyattMill Reach=HyattMill RS= 10
< .065 .065 v
1944 0 Legend
flirui 1942-
1..--_________40 ' ■
WS 100 year
x
1940- WS 50 year
• 1938- WS 25 year
c •
g co 1936- WS 10 year
w 1934- WS 2 year
WSt
1932-
•
Ground
1930- •
Bank Sta
1928
0 50 100 150 200 250
Station(ft)

HyattMill_NCDOT Plan: HyattMill_Proposed 1/17/2019
River=HyattMill Reach=HyattMill RS=9
< .065 > < .065 ÷
1944- 0 3 Legend
1942- 5 `'' •
WS 100 year
x
1940- WS 50 year
• 1938- WS 25 year
I
•
1936- WS 10 year
1934 WS 2 year
t
1932 WS Bankfull
■
Ground
1930- •
Bank Sta
1928 1 , , 1 , 1 I
0 50 100 150 200 250
Station(ft)
HyattMill_NCDOT Plan: HyattMill_Proposed 1/17/2019
River=HyattMill Reach=HyattMill RS=8.1
< .065 .065 f
1944- 3
3 Legend
•
1942- 5 y ~ WS 100 year
x
1940- WS 50 year
• 1938 WS 25 year
o
.- 1936 WS 10 year
w 1934- WS 2 year
1932- _ Z -.-WS Bankfull
•
Ground
1930- ` •
Bank Sta
1928 1 , , 1 , , 1 I
0 50 100 150 200 250
Station(ft)
HyattMill_NCDOT Plan: HyattMill_Proposed 1/17/2019
River=HyattMill Reach=HyattMill RS=8
< .065 .065 H
1944- 0
3 Legend
-
1942- 5 •
WS 100 year
x
1940- WS 50 year
• 1938 WS 25 year
c •
g
as 1936 WS 10 year
a) WS 2 year
w 1934- ■
t
1932- ! WS Bankfull
•
Ground
1930- •
Bank Sta
1928
0 50 100 150 200 250
Station(ft)

HyattMill_NCDOT Plan: HyattMill_Proposed 1/17/2019
River=HyattMill Reach=HyattMill RS=7.5
< .065 > < .065 H
1944- 0 Legend
3
1942- 5 •
WS 100 year
x
1940- WS 50 year
1938- WS 25 year
c •
o
- 1936- WS 10 year
w 1934 WS 2 year
t
•
1932 WS Bankfull
■
Ground
1930- • •
Bank Sta
1928 1 , , 1 , 1 I
0 50 100 150 200 250
Station(ft)
HyattMill_NCDOT Plan: HyattMill_Proposed 1/17/2019
River=HyattMill Reach=HyattMill RS=7.4
< .065 = . H .065 H
1942= 0 Legend
3
5 •1940
WS 100 year
x
1938 WS 50 year
WS 25 year
c 1936- •
o
- = WS 10 year
e> 1934=
w WS 2 year
1932- $ WSt
1930 •
Ground
•
Bank Sta
1928 1 , ,
0 50 100 150 200 250
Station(ft)
HyattMill_NCDOT Plan: HyattMill_Proposed 1/17/2019
River=HyattMill Reach=HyattMill RS=7.3
< .065 . H- —.065
1942- 0 Legend
3 . �.
1940- 5 •
WS 100 year
x
1938- WS 50 year
g 1936 WS 25 year
c •
g c 1934- '11 . WS 10 year
w 1932 WS 2 year
t
1930 WS Bankfull
Ground
1928- •
Bank Sta
1926 1 i i 1 , 1 i i i , ,
0 50 100 150 200 250
Station(ft)

HyattMill_NCDOT Plan: HyattMill_Proposed 1/17/2019
River=HyattMill Reach=HyattMill RS=7.2
< .065 . < .065
1942= 0 3 Legend
5 �1940
WS 100 year
x
1938 WS 50 year
WS 25 year
c 1936' . •
o
= WS 10 year
CD
e> 1934=
w WS 2 year
1932 $ Wst
•
1930 Ground
•
Bank Sta
1928 1 1 i 1 ,
0 50 100 150 200 250 300
Station(ft)
HyattMill_NCDOT Plan: HyattMill_Proposed 1/17/2019
River=HyattMill Reach=HyattMill RS=7.1
< .065 - 3. < .065
1942= 3 Legend
5 �1940
WS 100 year
x
1938- WS 50 year
- WS 25 year
0 1936 •
•� WS 10 year
1934=
e> WS 2 year
1932- WS Bankfull
1930 Ground
•
1111 Bank Sta
1928 1 1 , 1 1 1 I
0 50 100 150 200 250 300
Station(ft)
HyattMill_NCDOT Plan: HyattMill_Proposed 1/17/2019
River=HyattMill Reach=HyattMill RS=7
< .065 —H . —.065
1942 3 3 Legend
1940- 5 ' . •
WS 100 year
x
1938- WS 50 year
1936 WS 25 year
�
1934
g � •
WS 10 year
co
w 1932 WS 2 year
1.1.--Th
t
1930 WS Bankfull
•
Ground
1928- •
V
Bank Sta
1926
0 50 100 150 200 250 300
Station(ft)

HyattMill_NCDOT Plan: HyattMill_Proposed 1/17/2019
River=HyattMill Reach=HyattMill RS=6
< .065 .065 H
1942- 0 Lend
3
5 '
WS 100 year
1940-
1938- WS 50ge year
1936 WS 25 year
c •
1934- WS au
as
w 1932-
1930
WS 2 year
_ WSt
10
■
' Ground
ye
1928- •
Bank Sta
1926 1 1 , 1 1 1 I
0 50 100 150 200 250 300
Station(ft)
HyattMill_NCDOT Plan: HyattMill_Proposed 1/17/2019
River= HyattMill Reach=HyattMill RS=5.5 Culv Proposed Driveway Culvert
< .065 H 0. H .065
1942
3 Legend
1940- 5 '
• WS 100 year
x
1938- WS 50 year
• 1936- WS 25 year
g •
..- 1934- WS 10 year
w 1932 WS 2 year
t
1930 WS Bankfull
■
Ground
1928- •
Bank Sta
1926 1 1 , 1 1 I
0 50 100 150 200 250 300
Station(ft)
HyattMill_NCDOT Plan: HyattMill_Proposed 1/17/2019
River= HyattMill Reach=HyattMill RS=5.5 Culv Proposed Driveway Culvert
< .065 . —.065-
1940- 0 Legend
1938 5 '
WS 100 year
x
1936- WS 50 year
• 1934 WS 25 year
c •
gfi 1932•_■- _ WS 10 year
w 1930 WS 2 year
t
1928 WS Bankfull
■
Ground
1926- •
Bank Sta
1924
0 50 100 150 200 250 300
Station(ft)

HyattMill_NCDOT Plan: HyattMill_Proposed 1/17/2019
River=HyattMill Reach=HyattMill RS=4.1
< .065 > . .065-
1940 0 3 Legend
1938- 5 '
WS 100 year
x
1936- WS 50 year
• 1934- WS 25 year
c •
o
1932 WS 10 year
co
w 1930 WS 2 year
1928 WSt
■
Ground
1926- •
Bank Sta
1924 1 1 , 1 1 1 I
0 50 100 150 200 250 300
Station(ft)
HyattMill_NCDOT Plan: HyattMill_Proposed 1/17/2019
River=HyattMill Reach=HyattMill RS=4
< .065 . ff .065
1940- 0 Legend
- 3
1938- 5 '
WS 100 year
•-.--.--Th is
1936- WS 50 year
• 1934- WS 25 year
c •
g 1932 WS 10 year
w 1930 WS 2 year
WSt
1928-
•
Ground
1926-
Bank Sta
1924 1 1 , 1 i
0 50 100 150 200 250 300
Station(ft)
HyattMill_NCDOT Plan: HyattMill_Proposed 1/17/2019
River=HyattMill Reach=HyattMill RS=3
< .065 .065 >
1940 o
3 Legend
1938- 5 '
WS 100 year
x
1936- WS 50 year
• 1934- WS 25 year
c •
m 1932- WS 10 year
w 1930 WS 2 year
t
1928- Z WS Bankfull
■
Ground
1926- •
Bank Sta
1924
0 50 100 150 200 250 300
Station(ft)

HyattMill_NCDOT Plan: HyattMill_Proposed 1/17/2019
River=HyattMill Reach=HyattMill RS=2.1
< .065 > < .065
1940- 0 3 Legend
-
1938- 5 r-'y •
WS 100 year
1936- WS 50 year
• 1934- WS 25 year
c •
g 1932 WS 10 year
> ' ■■F...
w 1930 � ■ WS 2 year
t
1928 g WS Bankfull
•
Ground
1926 •-
Bank Sta
1924 1 1 , i
0 50 100 150 200 250 300
Station(ft)
HyattMill_NCDOT Plan: HyattMill_Proposed 1/17/2019
River=HyattMill Reach=HyattMill RS=2
< .065 .065
1940 0
3 Legend
1938- 5 •
WS 100 year
x
1936- WS 50 year
• 1934- WS 25 year
c - •
o
1932- WS 10 year
w 1930 WS 2 year
t
1928 WS Bankfull
■
Ground
1926- •
Bank Sta
1924 1 1 , 1 1 1 1
0 50 100 150 200 250 300
Station(ft)
HyattMill_NCDOT Plan: HyattMill_Proposed 1/17/2019
River=HyattMill Reach=HyattMill RS= 1
< .065 H 0. .065 H
1940-
3 Legend
1938- ��
5 - .�-■ WS 100 year
1936- WS 50 year
• 1934- WS 25 year
c - t•
g• 1932- WS 10 year
>
a) WS 2 ear
w 1930 t y
1928 WS Bankfull
■
Ground
1926- •
Bank Sta
1924
0 50 100 150 200 250
Station(ft)

HyattMill_NCDOT Plan: HyattMill_Proposed 1/17/2019
River=HyattMill Reach=HyattMill RS=0.1
< .065 . < .065 H
1940 o
3 Legend
•
1938- dr—sa" WS 100 year
1936- WS 50 year
1934- WS 25 year
c - •
o
1932- WS 10 year
�� f f
w 1930- WS 2 year
-•____._,\
1928 }! WS Bankfull
•
Z Ground
1926- — >�— •
—
�•+ Bank Sta
1924
0 50 100 150 200 250
Station(ft)

HEC-RAS Plan:PR River:HyattMill Reach:HyattMill
Reach River Ste Profile Q Total Min Ch El W.S.Elev Crit W.S. E.G.Elev E.G.Slope Vel Chnl Flow Area Top Width Froude#Chl Shear Chan
(cfs) (ft) (ft) (ft) (ft) (ft/ft) (ft/s) (sq ft) (ft) (lb/sq ft)
HyattMill 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
HyattMill 23 10 year 234.47 1934.18 1936.83 1936.83 1937.57 0.011688 7.76 46.85 33.85 0.90 1.61
HyattMill 23 25 year 336.96 1934.18 1937.28 1937.26 1938.16 0.011583 8.71 62.95 37.17 0.92 1.90
HyattMill 23 50 year 423.99 1934.18 1937.74 1937.59 1938.61 0.009715 8.85 80.71 39.22 0.87 1.86
HyattMill 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
HyattMill 23 Bankfull 39.00 1934.18 1935.29 1935.29 1935.69 0.020448 5.06 7.70 9.67 1.00 0.97
HyattMill 22.1 2 year 91.27 1933.70 1935.84 1935.49 1936.12 0.005402 4.47 27.91 27.58 0.59 0.58
HyattMill 22.1 10 year 234.47 1933.70 1936.83 1936.42 1937.31 0.005951 6.29 58.60 34.23 0.66 0.99
HyattMill 22.1 25 year 336.96 1933.70 1937.35 1936.87 1937.95 0.006218 7.20 77.05 37.60 0.70 1.22
HyattMill 22.1 50 year 423.99 1933.70 1937.73 1937.22 1938.44 0.006582 7.96 91.76 43.62 0.73 1.44
HyattMill 22.1 100 year 517.93 1933.70 1937.99 1937.56 1938.90 0.007720 9.03 104.09 47.78 0.80 1.81
HyattMill 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
HyattMill 22 2 year 91.27 1932.70 1935.88 1934.99 1936.04 0.002604 3.46 34.38 27.73 0.41 0.33
HyattMill 22 10 year 234.47 1932.70 1936.86 1936.12 1937.23 0.003860 5.40 65.27 35.12 0.54 0.71
HyattMill 22 25 year 336.96 1932.70 1937.37 1936.60 1937.86 0.004312 6.31 84.58 43.37 0.58 0.92
HyattMill 22 50 year 423.99 1932.70 1937.75 1937.00 1938.35 0.004788 7.09 101.42 45.74 0.62 1.12
HyattMill 22 100 year 517.93 1932.70 1938.08 1937.55 1938.76 0.005043 7.67 116.83 46.91 0.65 1.28
HyattMill 22 Bankfull 39.00 1932.70 1935.20 1934.31 1935.28 0.001973 2.35 17.65 18.94 0.34 0.17
HyattMill 21 2 year 91.27 1933.70 1935.48 1935.48 1935.96 0.012395 5.82 20.46 26.19 0.86 1.06
HyattMill 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
HyattMill 21 25 year 336.96 1933.70 1936.84 1936.84 1937.75 0.011594 8.78 62.73 37.70 0.93 1.93
HyattMill 21 50 year 423.99 1933.70 1937.30 1937.30 1938.25 0.010162 9.12 82.33 43.11 0.89 1.97
HyattMill 21 100 year 517.93 1933.70 1937.81 1937.58 1938.68 0.008147 8.99 104.54 44.78 0.82 1.83
HyattMill 21 Bankfull 39.00 1933.70 1934.82 1934.82 1935.21 0.020047 5.02 7.77 9.75 0.99 0.95
HyattMill 20.1 2 year 91.27 1933.30 1935.23 1935.08 1935.65 0.009294 5.39 21.23 22.77 0.75 0.88
HyattMill 20.1 10 year 234.47 1933.30 1935.91 1936.06 1936.95 0.015337 8.79 39.34 30.56 1.03 2.07
HyattMill 20.1 25 year 336.96 1933.30 1936.71 1936.72 1937.61 0.009690 8.54 67.37 39.74 0.86 1.77
HyattMill 20.1 50 year 423.99 1933.30 1937.03 1937.03 1938.04 0.009992 9.27 80.30 40.76 0.89 2.01
HyattMill 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
HyattMill 20.1 Bankfull 39.00 1933.30 1934.67 1934.42 1934.89 0.008231 3.79 10.60 13.76 0.66 0.50
HyattMill 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
HyattMill 20 10 year 234.47 1932.24 1936.13 1935.67 1936.62 0.005494 6.09 60.75 38.48 0.63 0.92
HyattMill 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
HyattMill 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
HyattMill 20 100 year 517.93 1932.24 1937.13 1936.90 1938.06 0.007854 8.87 103.49 44.53 0.79 1.77
HyattMill 20 Bankfull 39.00 1932.24 1934.71 1933.80 1934.79 0.001989 2.35 17.56 19.01 0.34 0.17
HyattMill 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
HyattMill 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
HyattMill 19.1 25 year 336.96 1933.20 1936.28 1936.28 1937.08 0.011023 8.45 74.15 45.90 0.90 1.80
HyattMill 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
HyattMill 19.1 100 year 517.93 1933.20 1936.60 1936.84 1937.90 0.016189 11.03 88.98 47.06 1.11 2.95
HyattMill 19.1 Bankfull 39.00 1933.20 1934.31 1934.31 1934.71 0.020651 5.06 7.70 9.76 1.00 0.97
HyattMill 18.1 2 year 91.27 1932.30 1933.72 1934.14 1934.80 0.037828 8.36 11.68 18.49 1.43 2.41
HyattMill 18.1 10 year 234.47 1932.30 1934.43 1935.01 1935.94 0.031474 10.74 34.05 39.07 1.42 3.34
HyattMill 18.1 25 year 336.96 1932.30 1934.73 1935.34 1936.51 0.032808 12.14 45.79 40.57 1.49 4.06
HyattMill 18.1 50 year 423.99 1932.30 1935.01 1935.58 1936.89 0.030568 12.76 59.28 49.06 1.46 4.30
HyattMill 18.1 100 year 517.93 1932.30 1935.21 1935.84 1937.25 0.031367 13.63 68.92 49.76 1.50 4.78
HyattMill 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
HyattMill 18 2 year 91.27 1931.25 1934.32 1933.51 1934.48 0.002742 3.46 39.97 45.41 0.42 0.33
HyattMill 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
HyattMill 18 25 year 336.96 1931.25 1935.36 1935.02 1935.81 0.005581 6.46 93.03 52.56 0.64 1.01
HyattMill 18 50 year 423.99 1931.25 1935.68 1935.27 1936.18 0.005702 6.96 109.93 53.67 0.66 1.14
HyattMill 18 100 year 517.93 1931.25 1935.98 1935.51 1936.54 0.005866 7.46 126.27 54.73 0.68 1.27
HyattMill 18 Bankfull 39.00 1931.25 1933.70 1932.81 1933.78 0.002038 2.36 18.00 24.26 0.34 0.17
HyattMill 17 2 year 91.27 1932.20 1933.94 1933.94 1934.40 0.012459 5.74 23.86 40.59 0.86 1.04
HyattMill 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
HyattMill 17 25 year 336.96 1932.20 1935.32 1934.99 1935.75 0.006791 6.71 95.51 54.40 0.71 1.13
HyattMill 17 50 year 423.99 1932.20 1935.65 1935.22 1936.12 0.006622 7.13 113.51 55.55 0.71 1.23
HyattMill 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
HyattMill 17 Bankfull 39.00 1932.20 1933.31 1933.31 1933.71 0.020492 5.07 7.70 9.67 1.00 0.97
HyattMill 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
HyattMill 16.1 10 year 234.47 1931.60 1934.16 1934.28 1934.98 0.013564 8.15 49.99 40.34 0.96 1.79
HyattMill 16.1 25 year 336.96 1931.60 1934.84 1934.84 1935.57 0.009350 8.09 81.76 54.48 0.84 1.61
HyattMill 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
HyattMill 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
HyattMill 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
HyattMill 16 2 year 91.27 1930.55 1933.61 1932.81 1933.80 0.002977 3.59 36.91 37.78 0.44 0.36
HyattMill 16 10 year 234.47 1930.55 1934.33 1933.96 1934.79 0.005731 6.06 64.86 40.62 0.64 0.93
HyattMill 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
HyattMill 16 50 year 423.99 1930.55 1935.08 1934.86 1935.76 0.006767 7.72 104.60 55.94 0.72 1.39
HyattMill 16 100 year 517.93 1930.55 1935.30 1935.14 1936.11 0.007687 8.56 116.90 56.70 0.78 1.67
HyattMill 16 Bankfull 39.00 1930.55 1933.01 1932.11 1933.09 0.002022 2.36 17.70 21.04 0.34 0.17

HEC-RAS Plan:PR River:HyattMill Reach:HyattMill(Continued)
Reach River Ste Profile Q Total Min Ch El W.S.Elev Crit W.S. E.G.Elev E.G.Slope Vel Chnl Flow Area Top Width Froude#Chl Shear Chan
(cfs) (ft) (ft) (ft) (ft) (ft/ft) (ft/s) (sq ft) (ft) (lb/sq ft)
HyattMill 15 2 year 91.27 1931.50 1933.31 1933.31 1933.72 0.010402 5.42 26.23 40.25 0.79 0.91
HyattMill 15 10 year 234.47 1931.50 1934.04 1934.04 1934.68 0.011775 7.53 56.40 43.09 0.90 1.54
HyattMill 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
HyattMill 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
HyattMill 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
HyattMill 15 Bankfull 39.00 1931.50 1932.61 1932.61 1933.01 0.020557 5.07 7.70 9.71 1.00 0.97
HyattMill 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
HyattMill 14.1 10 year 234.47 1930.90 1933.13 1933.57 1934.34 0.024270 9.79 40.54 46.99 1.26 2.73
HyattMill 14.1 25 year 336.96 1930.90 1934.04 1933.89 1934.57 0.007926 7.26 88.82 56.42 0.77 1.32
HyattMill 14.1 50 year 423.99 1930.90 1934.32 1934.10 1934.90 0.008004 7.78 104.96 57.42 0.78 1.47
HyattMill 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
HyattMill 14.1 Bankfull 39.00 1930.90 1932.31 1932.01 1932.51 0.007060 3.60 11.51 18.37 0.62 0.45
HyattMill 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
HyattMill 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
HyattMill 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
HyattMill 14 50 year 423.99 1929.85 1934.01 1933.81 1934.74 0.008758 8.17 94.84 57.07 0.81 1.61
HyattMill 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
HyattMill 14 Bankfull 39.00 1929.85 1932.33 1931.41 1932.41 0.001887 2.30 19.04 27.80 0.33 0.16
HyattMill 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
HyattMill 13 10 year 234.47 1930.80 1933.16 1933.16 1933.72 0.012525 7.31 59.36 49.83 0.91 1.49
HyattMill 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
HyattMill 13 50 year 423.99 1930.80 1933.56 1933.82 1934.54 0.018352 10.01 80.11 57.75 1.14 2.63
HyattMill 13 100 year 517.93 1930.80 1933.90 1934.02 1934.89 0.016130 10.25 99.90 58.96 1.09 2.64
HyattMill 13 Bankfull 39.00 1930.80 1931.91 1931.91 1932.31 0.020664 5.04 7.73 9.87 1.00 0.97
HyattMill 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
HyattMill 12.1 10 year 234.47 1930.20 1932.91 1932.78 1933.41 0.008494 6.70 67.74 50.35 0.77 1.19
HyattMill 12.1 25 year 336.96 1930.20 1933.42 1933.13 1933.95 0.007529 7.19 93.73 52.38 0.75 1.28
HyattMill 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
HyattMill 12.1 100 year 517.93 1930.20 1933.86 1933.65 1934.65 0.009635 8.97 117.57 54.18 0.87 1.90
HyattMill 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
HyattMill 12 2 year 91.27 1929.15 1932.17 1931.44 1932.34 0.002982 3.55 42.13 46.75 0.44 0.35
HyattMill 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
HyattMill 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
HyattMill 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
HyattMill 12 100 year 517.93 1929.15 1933.75 1933.47 1934.52 0.008032 8.52 121.30 53.83 0.79 1.68
HyattMill 12 Bankfull 39.00 1929.15 1931.62 1930.71 1931.70 0.001941 2.33 19.27 29.26 0.33 0.17
HyattMill 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
HyattMill 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
HyattMill 11 25 year 336.96 1930.10 1932.77 1932.77 1933.67 0.016608 9.28 72.59 51.03 1.08 2.29
HyattMill 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
HyattMill 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
HyattMill 11 Bankfull 39.00 1930.10 1931.21 1931.21 1931.61 0.020572 5.05 7.72 9.78 1.00 0.97
HyattMill 10.1 2 year 91.27 1929.70 1931.68 1931.52 1931.92 0.006016 4.41 33.15 44.27 0.61 0.58
HyattMill 10.1 10 year 234.47 1929.70 1932.43 1932.17 1932.81 0.006782 6.04 67.74 48.86 0.69 0.96
HyattMill 10.1 25 year 336.96 1929.70 1932.87 1932.55 1933.30 0.006560 6.65 90.56 52.78 0.70 1.10
HyattMill 10.1 50 year 423.99 1929.70 1933.19 1932.80 1933.66 0.006411 7.07 107.72 53.98 0.70 1.20
HyattMill 10.1 100 year 517.93 1929.70 1933.43 1933.03 1934.01 0.007342 7.94 120.73 59.03 0.76 1.48
HyattMill 10.1 Bankfull 39.00 1929.70 1931.18 1930.81 1931.34 0.005541 3.31 13.74 27.07 0.55 0.37
HyattMill 10 2 year 91.27 1928.70 1931.70 1930.99 1931.85 0.002704 3.36 41.08 41.47 0.42 0.32
HyattMill 10 10 year 234.47 1928.70 1932.39 1931.97 1932.73 0.004921 5.50 70.94 48.27 0.59 0.77
HyattMill 10 25 year 336.96 1928.70 1932.81 1932.30 1933.23 0.005341 6.30 91.47 51.01 0.63 0.96
HyattMill 10 50 year 423.99 1928.70 1933.05 1932.65 1933.58 0.006220 7.14 104.20 55.39 0.69 1.21
HyattMill 10 100 year 517.93 1928.70 1933.29 1932.79 1933.92 0.006875 7.87 118.26 59.97 0.73 1.43
HyattMill 10 Bankfull 39.00 1928.70 1931.21 1930.26 1931.28 0.001719 2.22 21.23 36.86 0.32 0.15
HyattMill 9 2 year 91.27 1929.70 1931.43 1931.43 1931.78 0.010612 5.27 27.23 40.23 0.79 0.88
HyattMill 9 10 year 234.47 1929.70 1932.06 1932.06 1932.63 0.012687 7.39 53.34 42.75 0.92 1.52
HyattMill 9 25 year 336.96 1929.70 1932.45 1932.45 1933.13 0.012412 8.24 71.66 48.43 0.94 1.78
HyattMill 9 50 year 423.99 1929.70 1932.69 1932.69 1933.46 0.012996 8.98 83.21 49.37 0.97 2.05
HyattMill 9 100 year 517.93 1929.70 1932.90 1932.90 1933.80 0.013786 9.74 93.97 50.23 1.01 2.35
HyattMill 9 Bankfull 39.00 1929.70 1930.80 1930.80 1931.21 0.020763 5.10 7.65 9.63 1.01 0.99
HyattMill 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
HyattMill 8.1 10 year 234.47 1929.10 1931.80 1931.61 1932.25 0.007987 6.50 59.97 41.47 0.75 1.12
HyattMill 8.1 25 year 336.96 1929.10 1932.26 1931.95 1932.80 0.007794 7.25 80.46 46.93 0.76 1.31
HyattMill 8.1 50 year 423.99 1929.10 1932.60 1932.24 1933.18 0.007641 7.73 96.60 49.65 0.77 1.44
HyattMill 8.1 100 year 517.93 1929.10 1932.86 1932.57 1933.53 0.007980 8.34 110.04 50.72 0.80 1.63
HyattMill 8.1 Bankfull 39.00 1929.10 1930.42 1930.20 1930.67 0.009497 3.96 10.18 16.38 0.70 0.55
HyattMill 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
HyattMill 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
HyattMill 8 25 year 336.96 1928.19 1932.30 1931.79 1932.74 0.005250 6.36 86.92 44.32 0.63 0.98
HyattMill 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
HyattMill 8 100 year 517.93 1928.19 1932.85 1932.29 1933.49 0.006466 7.84 112.93 50.51 0.71 1.41
HyattMill 8 Bankfull 39.00 1928.19 1930.51 1929.67 1930.60 0.002379 2.49 16.91 24.40 0.37 0.20

HEC-RAS Plan:PR River:HyattMill Reach:HyattMill(Continued)
Reach River Ste Profile Q Total Min Ch El W.S.Elev Crit W.S. E.G.Elev E.G.Slope Vel Chnl Flow Area Top Width Froude#Chl Shear Chan
(cfs) (ft) (ft) (ft) (ft) (ft/ft) (ft/s) (sq ft) (ft) (lb/sq ft)
HyattMill 7.5 2 year 91.27 1929.00 1930.75 1930.75 1931.12 0.010710 5.34 25.82 37.51 0.80 0.90
HyattMill 7.5 10 year 234.47 1929.00 1931.74 1931.42 1932.12 0.006600 5.99 65.07 41.47 0.68 0.94
HyattMill 7.5 25 year 336.96 1929.00 1932.23 1931.76 1932.67 0.006284 6.62 85.85 43.43 0.69 1.08
HyattMill 7.5 50 year 423.99 1929.00 1932.54 1932.03 1933.04 0.006637 7.27 99.09 44.64 0.72 1.26
HyattMill 7.5 100 year 517.93 1929.00 1932.78 1932.29 1933.39 0.007382 8.05 109.94 45.60 0.77 1.51
HyattMill 7.5 Bankfull 39.00 1929.00 1930.11 1930.11 1930.51 0.020061 5.02 7.77 9.74 0.99 0.96
HyattMill 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
HyattMill 7.4 10 year 234.47 1928.50 1931.77 1931.00 1931.99 0.003175 4.74 83.21 42.92 0.49 0.55
HyattMill 7.4 25 year 336.96 1928.50 1932.25 1931.35 1932.54 0.003492 5.50 104.28 44.84 0.53 0.71
HyattMill 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
HyattMill 7.4 100 year 517.93 1928.50 1932.75 1931.90 1933.25 0.004964 7.20 131.84 60.85 0.64 1.16
HyattMill 7.4 Bankfull 39.00 1928.50 1929.86 1929.60 1930.08 0.008216 3.78 10.91 19.28 0.66 0.50
HyattMill 7.3 2 year 91.27 1927.45 1930.38 1929.74 1930.56 0.003221 3.58 37.14 38.12 0.45 0.36
HyattMill 7.3 10 year 234.47 1927.45 1931.77 1930.71 1931.95 0.002051 4.08 93.77 43.66 0.39 0.40
HyattMill 7.3 25 year 336.96 1927.45 1932.24 1931.09 1932.49 0.002535 4.95 117.54 56.45 0.45 0.56
HyattMill 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
HyattMill 7.3 100 year 517.93 1927.45 1932.78 1931.65 1933.16 0.003365 6.23 151.47 68.81 0.53 0.85
HyattMill 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
HyattMill 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
HyattMill 7.2 10 year 234.47 1928.40 1931.75 1930.74 1931.92 0.002373 4.17 95.59 45.34 0.42 0.42
HyattMill 7.2 25 year 336.96 1928.40 1932.20 1931.09 1932.46 0.003091 5.23 118.54 59.90 0.50 0.64
HyattMill 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
HyattMill 7.2 100 year 517.93 1928.40 1932.67 1931.60 1933.11 0.004630 6.97 152.25 83.57 0.62 1.08
HyattMill 7.2 Bankfull 39.00 1928.40 1929.51 1929.51 1929.91 0.020717 5.07 7.69 9.72 1.01 0.98
HyattMill 7.1 2 year 91.27 1928.00 1929.57 1929.77 1930.23 0.020720 6.78 18.43 37.26 1.08 1.51
HyattMill 7.1 10 year 234.47 1928.00 1931.74 1930.43 1931.88 0.001633 3.76 112.20 60.76 0.36 0.33
HyattMill 7.1 25 year 336.96 1928.00 1932.20 1930.77 1932.41 0.002192 4.74 143.82 76.05 0.43 0.50
HyattMill 7.1 50 year 423.99 1928.00 1932.46 1931.04 1932.73 0.002739 5.53 164.59 94.45 0.48 0.67
HyattMill 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
HyattMill 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
HyattMill 7 2 year 91.27 1926.95 1929.85 1929.39 1930.02 0.003287 3.58 37.57 38.04 0.45 0.37
HyattMill 7 10 year 234.47 1926.95 1931.73 1930.18 1931.86 0.001304 3.54 122.20 64.67 0.32 0.29
HyattMill 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
HyattMill 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
HyattMill 7 100 year 517.93 1926.95 1932.71 1931.04 1932.98 0.002243 5.41 205.72 103.63 0.44 0.62
HyattMill 7 Bankfull 39.00 1926.95 1929.41 1928.49 1929.49 0.001871 2.27 21.29 36.29 0.33 0.16
HyattMill 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
HyattMill 6 10 year 234.47 1927.90 1931.71 1930.21 1931.84 0.001606 3.78 131.15 85.56 0.36 0.33
HyattMill 6 25 year 336.96 1927.90 1932.20 1930.57 1932.35 0.001683 4.22 176.19 99.00 0.37 0.40
HyattMill 6 50 year 423.99 1927.90 1932.48 1930.81 1932.65 0.001833 4.62 205.14 104.26 0.40 0.46
HyattMill 6 100 year 517.93 1927.90 1932.73 1931.12 1932.93 0.002105 5.14 232.16 115.78 0.43 0.56
HyattMill 6 Bankfull 39.00 1927.90 1929.00 1929.00 1929.41 0.020879 5.11 7.64 9.61 1.01 0.99
HyattMill 5.5 Culvert
HyattMill 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
HyattMill 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
HyattMill 4.1 25 year 336.96 1925.80 1928.73 1928.73 1929.51 0.012042 8.50 65.37 40.43 0.93 1.85
HyattMill 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
HyattMill 4.1 100 year 517.93 1925.80 1929.28 1929.28 1930.27 0.012514 9.86 88.29 42.65 0.98 2.34
HyattMill 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
HyattMill 4 2 year 91.27 1924.75 1927.68 1927.03 1927.87 0.003338 3.65 35.95 38.33 0.46 0.38
HyattMill 4 10 year 234.47 1924.75 1928.34 1928.05 1928.76 0.006100 5.97 61.82 40.98 0.65 0.92
HyattMill 4 25 year 336.96 1924.75 1928.62 1928.42 1929.23 0.008001 7.32 73.70 42.15 0.76 1.34
HyattMill 4 50 year 423.99 1924.75 1928.88 1928.71 1929.61 0.008757 8.11 84.74 43.20 0.80 1.59
HyattMill 4 100 year 517.93 1924.75 1929.08 1928.97 1929.97 0.010034 9.05 93.53 44.02 0.87 1.94
HyattMill 4 Bankfull 39.00 1924.75 1927.20 1926.31 1927.29 0.002005 2.34 18.60 27.88 0.34 0.17
HyattMill 3 2 year 91.27 1925.70 1927.44 1927.44 1927.79 0.010408 5.22 27.22 40.24 0.78 0.86
HyattMill 3 10 year 234.47 1925.70 1928.06 1928.06 1928.65 0.012630 7.38 53.16 42.79 0.92 1.52
HyattMill 3 25 year 336.96 1925.70 1928.40 1928.40 1929.12 0.013342 8.41 67.80 44.16 0.97 1.87
HyattMill 3 50 year 423.99 1925.70 1928.65 1928.65 1929.47 0.013803 9.14 78.91 45.17 1.00 2.14
HyattMill 3 100 year 517.93 1925.70 1928.89 1928.89 1929.82 0.014287 9.87 89.80 46.14 1.03 2.42
HyattMill 3 Bankfull 39.00 1925.70 1926.81 1926.81 1927.21 0.020299 5.03 7.75 9.79 1.00 0.96
HyattMill 2.1 2 year 91.27 1925.20 1926.74 1927.00 1927.51 0.024159 7.19 16.18 35.25 1.16 1.72
HyattMill 2.1 10 year 234.47 1925.20 1927.37 1927.65 1928.36 0.022578 9.22 41.74 42.35 1.21 2.45
HyattMill 2.1 25 year 336.96 1925.20 1927.69 1927.99 1928.82 0.022587 10.25 55.23 43.62 1.24 2.87
HyattMill 2.1 50 year 423.99 1925.20 1927.92 1928.25 1929.17 0.022604 10.99 65.47 44.56 1.26 3.19
HyattMill 2.1 100 year 517.93 1925.20 1928.15 1928.48 1929.52 0.022505 11.67 75.85 45.50 1.28 3.48
HyattMill 2.1 Bankfull 39.00 1925.20 1926.16 1926.31 1926.75 0.036328 6.19 6.30 9.04 1.31 1.52
HyattMill 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
HyattMill 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
HyattMill 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
HyattMill 2 50 year 423.99 1924.17 1928.13 1928.01 1928.84 0.009682 8.21 85.76 46.52 0.84 1.67
HyattMill 2 100 year 517.93 1924.17 1928.39 1928.25 1929.20 0.009996 8.83 98.21 47.59 0.86 1.87

HEC-RAS Plan:PR River:HyattMill Reach:HyattMill(Continued)
Reach River Ste Profile Q Total Min Ch El W.S.Elev Crit W.S. E.G.Elev E.G.Slope Vel Chnl Flow Area Top Width Froude#Chl Shear Chan
(cfs) (ft) (ft) (ft) (ft) (ft/ft) (ft/s) (sq ft) (ft) (lb/sq ft)
HyattMill 2 Bankfull 39.00 1924.17 1926.49 1925.71 1926.60 0.002783 2.60 15.94 27.41 0.39 0.22
HyattMill 1 2 year 91.27 1924.07 1926.82 1926.53 1927.02 0.004293 3.88 35.61 43.28 0.51 0.44
HyattMill 1 10 year 234.47 1924.07 1927.45 1927.23 1927.86 0.007080 6.09 63.36 45.79 0.69 0.98
HyattMill 1 25 year 336.96 1924.07 1927.81 1927.57 1928.33 0.007855 7.03 80.07 47.25 0.74 1.25
HyattMill 1 50 year 423.99 1924.07 1928.07 1927.83 1928.68 0.008302 7.69 92.88 48.33 0.78 1.45
HyattMill 1 100 year 517.93 1924.07 1928.34 1928.07 1929.03 0.008618 8.29 105.92 49.41 0.80 1.64
HyattMill 1 Bankfull 39.00 1924.07 1926.47 1925.63 1926.55 0.002163 2.38 20.53 41.85 0.35 0.18
HyattMill 0.1 2 year 91.27 1925.00 1926.68 1926.61 1926.93 0.009003 4.70 32.60 45.61 0.72 0.71
HyattMill 0.1 10 year 234.47 1925.00 1927.37 1927.16 1927.74 0.009005 6.22 64.96 48.38 0.78 1.08
HyattMill 0.1 25 year 336.96 1925.00 1927.75 1927.47 1928.20 0.009002 6.98 83.51 49.90 0.80 1.28
HyattMill 0.1 50 year 423.99 1925.00 1928.03 1927.70 1928.54 0.009015 7.53 97.72 51.03 0.81 1.44
HyattMill 0.1 100 year 517.93 1925.00 1928.31 1927.92 1928.88 0.009008 8.04 112.09 52.15 0.83 1.58
HyattMill 0.1 Bankfull 39.00 1925.00 1926.29 1926.26 1926.48 0.009006 3.71 14.99 44.05 0.68 0.50

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) (ft) (ft) (ft) (ft) (cfs) (cfs) (cfs) (ft)
HyattMill 23 2 year 1936.45 1935.98 0.47 0.13 0.06 0.73 83.70 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 24.26
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) (ft) (ft) (ft) (ft) (cfs) (cfs) (cfs) (ft)
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 1936.28 1935.36 0.91 0.10 0.03 103.02 325.65 89.27 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 1935.21 1934.40 0.81 0.18 0.08 58.29 223.30 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 0.29 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 25.22 150.86 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 53.23
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 1932.25 1931.87 0.38 0.11 0.04 9.60 77.15 4.51 46.26
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 44.27
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) (ft) (ft) (ft) (ft) (cfs) (cfs) (cfs) (ft)
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 1933.23 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 0.24 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 0.28 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) (ft) (ft) (ft) (ft) (cfs) (cfs) (cfs) _ (ft)
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 95.28
HyattMill 7 100 year 1932.98 1932.71 0.27 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 37.29
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 62.87 104.26
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 0.25 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 43.28
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 0.26 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

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LEGEND — — - / 193T— / / — / — - 193�934
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EXISTING HEC—RAS CROSS SECTION ,_1061__i .7 —,936 — — _ _ _ _
PROPOSED HEC—RAS CROSS SECTION = _ — —— 2 / \ 1 r`r = — 40' 0 40' 80'
EX AND PR HEC-RAS CROSS SECTION = _�� ��-- �416, \ �4 1> \ 1 I \ \ 1 \\ I SCALE: 1' - 40'
EXISTING 100-YR WSEL .•_.-_.._--_ _ \�` -\\\\`\\\\ \ ` I 1 \ \� �I �I �\ I /
PROPOSED 100-YR WESL — •�, \, \ ��, . \ \ \ \, \. \ \ \, ► / , \ I j /- — NCDOT Hyatt Mill Stream Relocation
100-Yr WSEL and HEC-RAS Cross Section Map