20050861 Ver 2_Application_20061115

Office Use Only: Form Version March 05
USACE Action ID No. DWQ No. Y ~ 0S - 0 8 to I
(If any particular item is not applicable to this project, please enter "Not Applicable" or "N/A".)
I. Processing
P\7F. Fr~` t S
~r
Check all of the approval(s) requested for this project: ~ ~.~E~VED
® Section 404 Permit ^ Riparian or Watershed Buffer Rules
^ Section 10 Permit ^ Isolated Wetland Permit from DWQ
® 401 Water Quality Certification ^ Express 401 Water Quality Certification
2. Nationwide, Regional or General Permit Number(s) Requested: Nationwide 27
3. If this notification is solely a courtesy copy because written approval for the 401 Certification
is not required, check here: ^
4. If payment into the North Carolina Ecosystem Enhancement Program (NCEEP) is proposed
for mitigation of impacts, attach the acceptance letter from NCEEP, complete section VIII,
and check here: ^
5. If your project is located in any of North Carolina's twenty coastal counties (listed on page
4), and the project is within a North Carolina Division of Coastal Management Area of
Environmental Concern (see the top of page 2 for further details), check here: ^
II. Applicant Information ~ ~ ~ ~ a v ~ ~~
1. Owner/Applicant Information NOV 1 5 2006
Name: C.L. White
Mailing Address: 705 Salem Fork Road y,~t~,iwDeM1~ATQR(~IWG~TtIIEiRI~i
Elkin NC 28621
Telephone Number: 336-366-4443 Fax Number: 336-366-2362
E-mail Address: iowhitew4nsuny.net
2. Agent/Consultant Information (A signed and dated copy of the Agent Authorization letter
must be attached if the Agent has signatory authority for the owner/applicant.)
Name: Jerry Dalton
Company Affiliation: Dalton Engineering
Mailing Address: P.O. Box 426
Clayton NC 27528
Telephone Number: 919-550-4740 Fax Number: 919-550-4741
E-mail Address: download(a~daltonen ink eerin>;.com
Updated 11/1!2005
Page 5 of 12

III. Project Information
Attach a vicinity map clearly showing the location of the property with respect to local
landmarks such as towns, rivers, and roads. Also provide a detailed site plan showing property
boundaries and development plans in relation to surrounding properties. Both the vicinity map
and site plan must include a scale and north arrow. The specific footprints of all buildings,
impervious surfaces, or other facilities must be included. If possible, the maps and plans should
include the appropriate USGS Topographic Quad Map and NRCS Soil Survey with the property
boundaries outlined. Plan drawings, or other maps may be included at the applicant's discretion,
so long as the property is clearly defined. For administrative and distribution purposes, the
USACE requires information to be submitted on sheets no larger than 11 by 17-inch format;
however, DWQ may accept paperwork of any size. DWQ prefers full-size construction
drawings rather than a sequential sheet version of the full-size plans. If full-size plans are
reduced to a small scale such that the final version is illegible, the applicant will be informed that
the project has been placed on hold until decipherable maps are provided.
1. Name of project: Snow Creek Stream Restoration Proiect
2. T.I.P. Project Number or State Project Number (NCDOT Only):
3. Property Identification Number (Tax PIN): 4975-00-38-5288
4. Location
County: Surry Nearest Town: Elkin
Subdivision name (include phase/lot number): N/A
Directions to site (include road numbers/names, landmarks, etc.): Interstate 77 to exit 93.
Take SR 1001 east to Salem Fork Road; Turn right on Salem Fork Road bear ri tat fork
and property is about 0.5 mile
Site coordinates (For linear projects, such as a road or utility line, attach a sheet that
separately lists the coordinates for each crossing of a distinct waterbody.)
Decimal Degrees (6 digits minimum): 36d 22' 46.7" °N 80d 47' 44" °W
6. Property size (acres): 175
7. Name of nearest receiving body of water: Snow Creek
8. River Basin: Yadkin
(Note -this must be one of North Carolina's seventeen designated major river basins. The
River Basin map is available at http://h2o.elu.state.nc.us/admil~/maps/.)
9. Describe the existing conditions on the site and general land use in the vicinity of the project
at the time of this application: Pasture land with full cattle access
Updated 11/1/2005
Page 6 of 12

10. Describe the overall project in detail, including the type of equipment to be used:
Stream Restoration -track excavators loaders
11. Explain the purpose of the proposed work: Restore stream to a natural pattern, profile and
Dimensions applicable to the existing valley type.
IV. Prior Project History
If jurisdictional determinations and/or permits have been requested and/or obtained for this
project (including all prior phases of the same subdivision) in the past, please explain. Include
the USACE Action ID Number, DWQ Project Number, application date, and date permits and
certifications were issued or withdrawn. Provide photocopies of previously issued permits,
certifications or other useful information. Describe previously approved wetland, stream and
buffer impacts, along with associated mitigation (where applicable). If this is a NCDOT project,
list and describe permits issued for prior segments of the same T.I.P. project, along with
construction schedules.
V. Future Project Plans
Are any future permit requests anticipated for this project? If so, describe the anticipated work,
and provide justification for the exclusion of this work from the current application.
VI. Proposed Impacts to Waters of the United States/Waters of the State
It is the applicant's (or agent's) responsibility to determine, delineate and map all impacts to
wetlands, open water, and stream channels associated with the project. Each impact must be
listed separately in the tables below (e.g., culvert installation should be listed separately from
riprap dissipater pads). Be sure to indicate if an impact is temporary. All proposed impacts,
permanent and temporary, must be listed, and must be labeled and clearly identifiable on an
accompanying site plan. All wetlands and waters, and all streams (intermittent and perennial)
should be shown on a delineation map, whether or not impacts are proposed to these systems.
Wetland and stream evaluation and delineation forms should be included as appropriate.
Photographs may be included at the applicant's discretion. If this proposed impact is strictly for
wetland or stream mitigation, list and describe the impact in Section VIII below. If additional
space is needed for listing or description, please attach a separate sheet.
1. Provide a written description of the proposed impacts:
Updated 11/1/2005
Page 7 of 12

2. Individually list wetland impacts. Types of impacts include, but are not limited to
mechanized clearing, grading, fill, excavation, flooding, ditching/drainage, etc. For dams,
separately list impacts due to both structure and floodins.
Wetland Impact
Site Number
(indicate on map)
Type of Impact Type of Wetland
(e.g., forested, marsh,
herbaceous, bog, etc.) Located within
100-year
Floodplain
( es/no) Distance to
Nearest
Stream
(linear feet) Area of
Impact
(acres)

Total Wetland Impact (acres)
3. List the total acreage (estimated) of all existing wetlands on the property:
4. Individually list all intermittent and perennial stream impacts. Be sure to identify temporary
impacts. Stream impacts include, but are not limited to placement of fill or culverts, dam
construction, flooding, relocation, stabilization activities (e.g., cement walls, rip-rap, crib
walls, gabions, etc.), excavation, ditching/straightening, etc. If stream relocation is proposed,
plans and profiles showing the linear footprint for both the original and relocated streams
mast he included. Tc calculate acreage. multiply length X width. then divide by 43.560.
Siream Impact
Number
indicate on ma
Stream Name
Type of Impact
Perennial or
Intermittent? Average
Stream Width
Before Im act Impact
Length
linear feet) Area of
Impact
acres)
1 UN Trib Replace Culvert Intermittent 3' 20' .0014

Total Stream Impact (by length and acreage) 20' .0014
5. Individually list all open water impacts (including lakes, ponds, estuaries, sounds, Atlantic
Ocean and any other water of the U.S.). Open water impacts include, but are not limited to
fill. excavation. dred~in~_ floodin~_ drainaee. bulkheads. etc.
Open Water Impact
Site Number

(indicate on ma) Name of Waterbody

(if applicable)
Type of Impact Type of Waterbody
(lake, pond, estuary, sound, bay,

ocean, etc.) Area of
Impact

(acres)

Total Open Water Impact (acres)
Updated 11/1/2005
Page 8 of 12

6. List t
he cumulative im act to all Waters of the U.S. resulting from the roject:
Stream Impact (acres): .0014
Wetland Impact (acres):
Open Water Impact (acres):
Total Impact to Waters of the U.S. (acres)
Total Stream Impact (linear feet): 20'
7. Isolated Waters
Do any isolated waters exist on the property? ^ Yes ®No
Describe all impacts to isolated waters, and include the type of water (wetland or stream) and
the size of the proposed impact (acres or linear feet). Please note that this section only
applies to waters that have specifically been determined to be isolated by the USACE.
8. Pond Creation
If construction of a pond is proposed, associated wetland and stream impacts should be
included above in the wetland and stream impact sections. Also, the proposed pond should
be described here and illustrated on any maps included with this application.
Pond to be created in (check all that apply): ^ uplands ^ stream ^ wetlands
Describe the method of construction (e.g., dam/embankment, excavation, installation of
draw-down valve or spillway, etc.):
Proposed use or purpose of pond (e.g., livestock watering, irrigation, aesthetic, trout pond,
local stormwater requirement, etc.):
Current land use in the vicinity of the pond:
Size of watershed draining to pond: Expected pond surface area:
VII. Impact Justification (Avoidance and Minimization)
Specifically describe measures taken to avoid the proposed impacts. It may be useful to provide
information related to site constraints such as topography, building ordinances, accessibility, and
financial viability of the project. The applicant may attach drawings of alternative, lower-impact
site layouts, and explain why these design options were not feasible. Also discuss how impacts
were minimized once the desired site plan was developed. If applicable, discuss construction
techniques to be followed during construction to reduce impacts.
Provide cattle access to pasture and protect the stream
VIII. Mitigation
DWQ - In accordance with 15A NCAC 2H .0500, mitigation may be required by the NC
Division of Water Quality for projects involving greater than or equal to one acre of impacts to
freshwater wetlands or greater than or equal to 150 linear feet of total impacts to perennial
streams.
Updated 11/1/2005
Page9of12

USACE - In accordance with the Final Notice of Issuance and Modification of Nationwide
Permits, published in the Federal Register on January 15, 2002, mitigation will be required when
necessary to ensure that adverse effects to the aquatic environment are minimal. Factors
including size and type of proposed impact and function and relative value of the impacted
aquatic resource will be considered in determining acceptability of appropriate and practicable
mitigation as proposed. Examples of mitigation that may be appropriate and practicable include,
but are not limited to: reducing the size of the project; establishing and maintaining wetland
and/or upland vegetated buffers to protect open waters such as streams; and replacing losses of
aquatic resource functions and values by creating, restoring, enhancing, or preserving similar
functions and values, preferable in the same watershed.
If mitigation is required for this project, a copy of the mitigation plan must be attached in order
for USACE or DWQ to consider the application complete for processing. Any application
lacking a required mitigation plan or NCEEP concurrence shall be placed on hold as incomplete.
An applicant may also choose to review the current guidelines for stream restoration in DWQ's
Draft Technical Guide for Stream Work in North Carolina, available at
http•//h2o enr.state.nc.us/ncwetlands/strmgide.html.
Provide a brief description of the proposed mitigation plan. The description should provide
as much information as possible, including, but not limited to: site location (attach directions
and/or map, if offsite), affected stream and river basin, type and amount (acreage/linear feet)
of mitigation proposed (restoration, enhancement, creation, or preservation), a plan view,
preservation mechanism (e.g., deed restrictions, conservation easement, etc.), and a
description of the current site conditions and proposed method of construction. Please attach
a separate sheet if more space is needed.
2. Mitigation may also be made by payment into the North Carolina Ecosystem Enhancement
Program (NCEEP). Please note it is the applicant's responsibility to contact the NCEEP at
[phone] to determine availability, and written approval from the NCEEP indicating
that they are will to accept payment for the mitigation must be attached to this form. For
additional information regarding the application process for the NCEEP, check the NCEEP
website at http•//h2o enr.state.nc.us/wry/index.htm. If use of the NCEEP is proposed, please
check the appropriate box on page five and provide the following information:
Amount of stream mitigation requested (linear feet):
Amount of buffer mitigation requested (square feet):
Amount of Riparian wetland mitigation requested (acres):
Amount ofNon-riparian wetland mitigation requested (acres):
Amount of Coastal wetland mitigation requested (acres):
Updated 11/1/2005
Page 10 of 12

IX. Environmental Documentation (required by DWQ)
1. Does the project involve an expenditure of public (federal/state/local) funds or the use of
public (federal/state) land? Yes ® No ^
2. If yes, does the project require preparation of an environmental document pursuant to the
requirements of the National or North Carolina Environmental Policy Act (NEPA/SEPA)?
Note: If you are not sure whether a NEPA/SEPA document is required, call the SEPA
coordinator at [phone] to review current thresholds for environmental documentation.
Yes ^ No
3. If yes, has the document review been finalized by the State Clearinghouse? If so, please
attach a copy of the NEPA or SEPA final approval letter. Yes ^ No ^
X. Proposed Impacts on Riparian and Watershed Buffers (required by DWQ)
It is the applicant's (or agent's) responsibility to determine, delineate and map all impacts to
required state and local buffers associated with the project. The applicant must also provide
justification for these impacts in Section VII above. All proposed impacts must be listed herein,
and must be clearly identifiable on the accompanying site plan. All buffers must be shown on a
map, whether or not impacts are proposed to the buffers. Correspondence from the DWQ
Regional Office may be included as appropriate. Photographs may also be included at the
applicant's discretion.
1. Will the project impact protected riparian buffers identified within 15A NCAC 2B .0233
(Meuse), 15A NCAC 2B .0259 (Tar-Pamlico), 15A NCAC 02B .0243 (Catawba) 15A NCAC
2B .0250 (Randleman Rules and Water Supply Buffer Requirements), or other (please
identify )? Yes ^ No
2. If "yes", identify the square feet and acreage of impact to each zone of the riparian buffers.
If buffer mitigation is required calculate the required amount of mitigation by applying the
buffer multi Tiers.
Zone* ,__~pa~t_.~ Multiplier Required
1 I 3 (2 for Catawba)
2 1.5
Total I ~ ~ ~
* Zone 1 extends out 30 feet perpendicular from the top of the near bank of channel; Zone 2 extends an
additional 20 feet from the edge of Zone 1.
3. If buffer mitigation is required, please discuss what type of mitigation is proposed (i.e.,
Donation of Property, Riparian Buffer Restoration /Enhancement, or Payment into the
Riparian Buffer Restoration Fund). Please attach all appropriate information as identified
within 15A NCAC 2B .0242 or .0244, or .0260.
Updated 11/1/2005
Page 1 I of 12

XI. Stormwater (required by DWQ)
Describe impervious acreage (existing and proposed) versus total acreage on the site. Discuss
Stormwater controls proposed in order to protect surface waters and wetlands downstream from
the property. If percent impervious surface exceeds 20%, please provide calculations
demonstrating total proposed impervious level.
N/A
XII. Sewage Disposal (required by DWQ)
Clearly detail the ultimate treatment methods and disposition (non-discharge or discharge) of
wastewater generated from the proposed project, or available capacity of the subject facility.
XIII. Violations (required by DWQ)
Is this site in violation of DWQ Wetland Rules (15A NCAC 2H .0500) or any Buffer Rules?
Yes ^ No
Is this anafter-the-fact permit application? Yes ^ No
XIV. Cumulative Impacts (required by DWQ)
Will this project (based on past and reasonably anticipated future impacts) result in additional
development, which could impact nearby downstream water quality? Yes ^ No
If yes, please submit a qualitative or quantitative cumulative impact analysis in accordance with
the most recent North Carolina Division of Water Quality policy posted on our website at
http://h2o.enr.state.nc.us/ncwetlands. If no, please provide a short narrative description:
The project will require a conservation easement required by the NC Clean Water Trust Fund
XV. Other Circumstances (Optional):
It is the applicant's responsibility to submit the application sufficiently in advance of desired
construction dates to allow processing time for these permits. However, an applicant may
choose to list constraints associated with construction or sequencing that may impose limits on
work schedules (e.g., draw-down schedules for lakes, dates associated with Endangered and
Threatened Species, accessibility problems, or other issues outside of the applicant's control).
~sptlcapt~Agent~s signature LdLC
signature is valid only if an authorization letter from the applicant is provided.)
Updated 11/1/2005
Page 12 of 12

C. L. White
September 1 S, 2006
US Army Corps of Engineers
6508 Falls of the Neuse Road, Suite 120
Raleigh, North Carolina 27615
RE: Agent Authorization
Dear Sir or Madam:
~i k E ~~!' _~ k
E~EIVED
The purpose of this letter is to inform the US Army Corps Of Engineers that the responsible
p~y~
C. L. White ~- ~ o
Address: 7(~ Sq~ ~t/11 1 ~K ~ Ted.
E(~(iN NC a1~G21
Telephone Number: 3 ~y` 3(~(i ' 4 4 ~(- 3
Fax Number: ~-3G~'23GZ D ~^~~~/~ D
Email: c~?~~laL~u~~Ne'~ ~C l/
Designates: ~~N E/v~jNePKi
NOV 1 5 2006
Dalton Engineering
P. O. BOx 426 DENR -WATER QUALITY
WETLANDS AND STORMWMITER BRANCH
Clayton, NC 27528
Telephone Number: 919-5504740
Fax Number: 919-550 4741
Email: download(c~daltoneng_ineering com
As the responsible party's authorized agent for the Snow Creek Stream Restoration Project
located in Surry County, North Carolina.
Please contact me wit any quest' ris, phone: 33lo'3(e(o' ~F~~3
~~
C. L. White

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' ame: BOTTOM Lora#ion: 036° 22' 46.7" N 080° 47' 44.0" W
mate: 5/18/2006 Caption: C. L. WHITE (SNOW CRI=EKj
Scale: 1 inch equals 2000 feet STRI=}1M 'RI=STRflAT10N
SURRY COUNTY, NC
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DESIGN - B4c

t
MORPHOLOGICAL CHARACTERISTICS OF THE EXISTING AND PROPOSED
CHANNEL WITH REFERENCE REACH DATA
(After Rosgen, 1996)
Restoration Site (Name of stream ~ location): Snow Creek, Surry County
Reference Reach (Name of stream 8< location): Long Hope Branch (2.2 sq. mi.), Watauga County
North Prong South Fork Mitchell River (3.5 sq. mi.), Surry County

t

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r
VARIABLES EXISTING PROPOSED REFERENCE
CHANNEL REACH REACH
1. Stream type B4c B4c C4
2. Drainage area 2 2 2.2
s . mi.)
3. Bankfull width Mean: 24.3 Mean: 20 Mean: 16.3
(wn~r) - ft.
Range: Range: Range: 16 -16.3
4. Bankfull mean Mean: 1.1 Mean: 1.4 Mean: 1.5
depth (db,~) - ft.
Range: Range: Range: 1.4 - 1.6
5. Width/depth Mean: 22.1 Mean: 14.3 Mean: 10.0
ratio (wb~/db~)
Range: Range: Range: 10.4 -11.4
6. Bankfull cross- Mean: 26.8 Mean: 28 Mean: 24.8
sectional area Range:
Abp - s . ft. Range: Range: 22.7 - 27
7. Bankfull mean Mean: 3.65 Mean: 3.65 Mean; 4.0
velocity (vb,~) - f/s
Range: Ran e: Ran e:
8. Bankfull discharge, g$ 98 107
cfs Qb~
9. Bankfull Mean: 2.1 Mean:2 Mean:2.15
Maximum depth
dm~ _ ft Range: 2.02 - 2.12 Range: Range: 2.1 - 2.2
10. Max d~ff/db,~ ratio Mean: 1.5 Mean: 1.42 Mean: 1.45
Ran e: Ran e: 1.4 -1.5 Ran e: 1.4 -1.5
11. Riffle Length (L~) Mean: 16.3 Mean: 40 Mean: 33.2
ft. Range: 7 - 27 Range: 28 - 98 Range: 7.6 - 81
12. Ratio riffle length Mean: 0.7 Mean: 2 Mean: 2
to bkf width Range: 0.3 -1.1 Range: 0.5 - 4.9 Range: 0.5 - 4.9
Leff /wn~t
13. Low bank height Mean: 1.1 Mean: 1.0 Mean: 1.0
to max. d~ ratio Range: Range: Range:
14. Width of Mean: 32.5 Mean: 36 Mean: 202.5
flood prone area
w a _ ft Range: Range: Range:
15. Entrenchment Mean:1.4 Mean: 1.8 Mean: 12.4
ratio (w~a/wb,~) Range: Range: Range: 9.8 - 15
Page 1 of 5 09/18J06

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VARIABLES EXISTING PROPOSED REFERENCE
CHANNEL REACH REACH
16. Meander length Mean: 156 Mean: 240 Mean: 196
(gym) _ ft, Range:89 -224 Range: 160 - 320 Range: 128 - 266
17. Ratio of Mean: 6.5 Mean: 12 Mean: 12
meander length

to bankfull Range: 3.7 - 9.3 Ran e: 8 -16
9 Ran e: 8 - 16
9
width L,,,/wbkf
18. Radius of Mean: 38 Mean: 60 Mean: 64.9
curvature (R~) -
ft Range: 14.7 - 61.3 Range: 44 -120 Range: 32 - 97.8
19. Ratio of radius Mean: 1.6 Mean: 3 Mean: 3
of curvature to
kfull width
an
b Range: 0.6 - 2.6 Range: 2.2 - 6 Range: 2 - 6
p
~
~ ~d wbkf
20. Belt width (wb,~ Mean: 49 Mean: 72 Mean: 57.7
- ft.
Range: 39 - 60 Range: 52 - 94 Range: 42 - 77
21. Meander width Mean: 2.0 Mean: 3.6 Mean: 3.6
ratio (wb,t/wbkf)
Range: 1.6 - 2.5 Range: 2.6 - 4.7 Range: 2.6 - 4.7
22. Sinuosity = k 1.15 1.15 1.7
(Stream Lengtht,,a,,~/
valle distance
23. Valley slope 0.0069 0.0069 0.0153
ft/ft
24. Average water 0.006 0.006 0.009
surface slope-ft/ft
Sav - Svalle
25. Pool slope Mean: 0.0006 Mean: 0.0009 Mean: 0.00373
(s~oi) - ft/ft
Ran e: 0.0002 - 0.0009
9
Ran e: 0.0006 - 0.0012
Ran e:0.00 - 0.0107
26. Ratio of pool Mean: 0.1 Mean: 0.15 Mean: 0.3985
slope to
aver
age slope Range: 0.03 - 0.15 Range: 0.1 - 0.2 Range: 0 -1.15
/
S N Sbkf
27. Maximum Mean: 3.1 Mean: 3.5 Mean: 2.4
pool depth
d max i _ ft Range: 2.9 - 3.3 Range: 2.5 - 4.2 Range: 2.3 - 2.4
28. Ratio of pool Mean: 2.8 Mean: 2.5 Mean: 2.1
depth to
average Range: 2.6 - 3.0 Range: 1.8 - 3.0 Range: 1.8 - 2.5
bankfull depth
dmax I~dbkf
29. Pool width Mean: 23.8 Mean: 22 Mean: 17.9
yy i _ ff, Range: Range: 18 - 23 Range:
30. Ratio of pool Mean: 1.0 Mean: 1.1 Mean: 1.1
width to
bankfull width Range: Range: 0.9 - 1.15 Range: 0.9 -1.15
w o,/w~ ,
31. Pool Area - sq ft Mean: 36.4 Mean: 42 Mean: 36.2
~ Range: Range: 39.2 - 44.8 Range: 35.3 - 37.1
Page 2 of 5 09/18/06

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VARIABLES EXISTING PROPOSED REFERENCE
CHANNEL REACH REACH
32. Ratio of Pool Mean: 1.35 Mean: 1.5 Mean: 1.5
Area to Bankfull
Area A ~/Abp Range: Range: 1.4 -1.6 Range: 1.4 -1.6
33. Pool to pool Mean: 107 Mean: 56 Mean: 97.5
spacing (p-p) -
ft Range: 82 -140 Range: 50 - 75 Range: 68.3 -127.4
34. Ratio of p-p Mean: 4.4 Mean: 2.8 Mean: 6
spacing to
bankfull width Range: 3.4 - 5.8 Range: 2.5 - 3.0 Range: 4.2 - 7.8
- /wbkf)
35. Pool length (L~i) Mean: 38 Mean: 22 Mean: 17.4
_ ft. Range: 62.6 - 80.2 Range: 10 - 40 Range: 7.7 - 32.6
36. Ratio of Pool Mean: 1.6 Mean: 1.1 Mean: 1.1
length to
bankfull width Range: 2.6 - 3.3 Range: 0.5 - 2.0 Range: 0.5 - 2.0
L I~bkf
37. Avg. riffle slope Mean: 0.041 Mean.: 0.012 Mean: 0.0126
s~ - ft./ft. Range: 0.014 - 0.072 Range: 0.005 - 0.013 Range: 0.006 - 0.017
38. Ratio of riffle Mean: 6.8 Mean: 2.0 Mean: 1.35
slope to avg.
slo a s~/sa„ Range: 2.3 -12.0 Range: 1.3 - 2.2 Range: 0.63 -1.8
39. Avg. run slope Mean: 0.037 Mean: 0.0096 Mean: 0.0146
{{/f{ Range: 0.013 - 0.061 Range: 0.004 - 0.013 Range: 0.005 - 0.022
40. Ratio of run Mean: 6.2 Mean: 1.6 Mean: 1.6
slope to avg
slo a s~,~/sa Range: 2.2 -10.2 Range: 1.4 - 2.2 Range: 0.6 - 2.4
41. Avg. glide slope Mean: 0.0047 Mean: 0.0012 Mean: 0.0054
{~ Range: 0.0042 - 0.0056 Range: 0.0009 - 0.0018 Range: 0.001 -
0.0158
42. Ratio of glide Mean: 0.8 Mean: 0.2 Mean: 0.58
slope to avg
sloe S ~~de/Sa~ Range: 0.7 - 0.9 Range: 0.15 - 0.3 Range: 0.12 -1.68
43. Max run depth Mean: 2.37 Mean: 2.5 Mean: 2.0
dm~ ~~~ _ ft. Range: 2.1 - 2.6 Range: 2.24 - 3.1 Range: 1.9 - 2.1
44. Ratio of max. run Mean: Mean: 1.8 Mean: 1.3
depth to mean bkf
de th dm~ ~,~dbkf Range: Range: 1.6 - 2.2 Range: 1.25 -1.3
45. Run width (wN~) Mean: Mean: 20 Mean: 21.3
_ ~. Range: Range: 16 - 22 Range: 20.4 - 22.2
46. Run width to Mean: Mean: 1.0 Mean: 1.3
bankfull width Range: Range: 0.8 -1.1 Range: 1.25 -1.4
ratio wN~wbkf
47. Mean run depth Mean: Mean: 1.5 Mean: 1.4
d~,~ ft. Range: Range: Range: 1.25 -1.4
48. Run w/d ratio Mean: Mean: 13.3 Mean:
w~,~,/d~,„ Range: Range: Range:
49. Ratio of run w/d Mean: Mean: 0.93 Mean: 0.93
to riffle w/d Range: Range: Range:
50. Run length (L~,~) Mean: Mean: 10 Mean:12.2
_ ft. Range: Range: 4 - 16 Range: 4.0 - 22.7
Page 3 of 5 09/18/06

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1
VARIABLES EXISTING PROPOSED REFERENCE
CHANNEL REACH REACH
51. Ratio of run Mean: Mean: 0.5 Mean: 0.75
length to bankfull Range: Range: 0.2 - 0.8 Range: 0.25 -1.4
width Lti„/wb,~
52. Max. glide depth Mean: Mean: 1.5 Mean: 2.3
dmax iide _ ft. Range: Range: 1.3 -1.7 Range: 1.8 - 2.6
53. Ratio of max. Mean: Mean: 1.1 Mean: 1.1
glide depth to
mean bkf depth Range: Range: 0.9 -1.2 Range: 0.9 -1.2
dmax lide/dbkf
54. Glide width Mean: Mean: 24 Mean: 26.1
w rde _ ft, Range: Range: 20 - 26 Range: 24 - 28.2
55. Ratio of glide Mean: Mean: 1.2 Mean: 1.6
width to bankfull Range: Range: 1.0 -1.3 Range: 1.5 -1.7
width W lid~wbkf
56. Glide mean Mean: Mean: 1.0 Mean: 1.57
de th d i;de - ft. Range: Range: Range:1.5 -1.6
57. Glide w/d ratio Mean: Mean: 24 Mean: 16.6
w i;~/d ;;de Range: Range: Range:
58. Ratio of glide w/d Mean: Mean: 1.7 Mean: 1.7
to riffle w/d Range: Range: Range:
59. Glide length Mean: Mean: 18 Mean: 13.3
L rde _ ~_ Range: Range: 8 - 24 Range: 5.7 - 23.5
60. Ratio of glide Mean: Mean: 0.9 Mean: 0.82
kfull
length to ba
n
''
//~~
width ( lide~rrbkf Range: Range: 0.4 -1.2 Range: 0.36 -1.4
MATERIALS:
1. Particle Size
Distribution of
Channel Material
mm
D 16 0.8 1.0
D 35 10.2 16.0
D 50 23.5 26.0
D 84 102.7 56.9
D 95 180 128.0
Remarks: The values calculated and shown on these I
beginning at station 0+00 and continuing to station 2+50
Pag~4-a€ S
are for the Bc4 section
09/18/06

VARIABLES EXISTING PROPOSED REFERENCE
CHANNEL REACH REACH
MATERIALS:
2. Particle Size
Distribution of
Riffle Bed
Material mm
p ~s 13 13 10.5
D 35 22.6 22.6 29.4
D so 34.8 34.8 41.75
D ~ 95.4 95.4 142.9
D ss 205.3 205.3 245..1
3. Particle Size
Distribution of
Bar Material mm EXISTING
CHANNEL PROPOSED
REACH REFERENCE
REACH
D ~s 7.6 7.6
D ss 20.3 20.3
D 50 31.9 31.9
D ~ 83.5 83.5
D 95 101.7 101.7
Largest size particle
at the toe (lower third)
of bar mm 110 110
SEDIMENT TRANSPORT VALIDATION
(BASED ON BANKFULL SHEAR STRESS)
Existin Condition
Pro osed Condition
Bankfull shear stress -Calculated value (Ib/ft) 0.46 0.51
Critical shear stress -Value from Shields Diagram(Ib/ )
OR Grain Diameter from Shields Diagram (mm)
Relation ad~usted to include field data 88mm 95mm
Critical dimensionless shear stress 0.015 0.015
Minimum mean db,~ calculated using critical
dimensionless shear stress a uations 1.36 1.4
Manning's "n" 0.04 0.04
These values and ratios were calculated and proposed by:
Name: Alan Walker
Stream Walker Consulting Date: August, 2006
Page 5 of 5
09/18/06

Bc/4 Riffle 0+00-2+50
ELEV DEPTH AREA WET PER WIDTH HYD RAD MEAN D SLOPE ROUGH R/D84 VELOCITY U/U' U"2/2g DISCHARGE SHEAR POWER POWERNV FROUDE TRANSPORT
(ft) (ft) (sq ft) (ft) (ft) (ft) (ft) (fUft) [fj (fps) (ft) (cfs) (psf) (Ib/s) (Ib/ft/s) (Ib/s)
1159.2 0.1 0.1 2.04 2.03 0.05 0.05 0.006 6.1289 0.16 0.11 1.14 0 0.01 0.02 0 0 0.09 0
1159.3 0.2 0.41 4.3 4.28 0.1 0.1 0:006 23.30207 0.32 0.08 0.58 0 0.03 0.04 0.01 0 0.05 0
1159.4 0.3 0.96 6.8 6.78 0.14 0.14 0.008 3.65735 0.45 0.24 1.48 0 0.23 0.05 0.09 0.01 0.11 0
1159.5 0.4 1.75 6.73 8.68 0.2 0.2 0.006 1.49358 0.84 0.45 2.31 0 0.8 0.07 0.3 0.03 0.18 0
1159.8 0.5 2.68 9.93 9.88 0.27 0.27 0.006 0.88745 0.87 0,69 3 0.01 1.84 0.1 0.69 0.07 0.23 0
1159.7 0.6 3.71 10.78 10.68 0.34 0.35 0.006 0.62103 1.09 0.92 3.59 0.01 3.41 0.13 1.28 0.12 0.27 0
1159.8 0.7 4.82 11.58 11.46 0.42 0.42 0.006 0.49462 1.35 1.15 4.02 0.02 5.52 0.16 2.07 0.18 0.31 0
1159.9 0.8 5.99 12.04 11.88 0.5 0.5 0.006 0.40886 1.6 1.38 4.42 0.03 8.24 0.19 3.08 0.28 0.34 0
1160 0.9 7.2 12.83 12.62 0.58 0.57 0,006 0.35594 1,8 1,58 4.74 0,04 11,23 0,21 4.2 0.33 0.38 0
1180,1 1 6.53 14.11 13.89 0.6 0.81 0.008 0,3279 1.92 1.68 4.94 0.04 14.36 0.22 5.37 0.39 0.38 0
1180.2 1.1 9.98 15.3 15,08 0.65 0.66 0.008 0.30178 2.09 1.82 5.15 0.05 18,21 0.24 8,82 0.45 0.4 0
1180.3 1,2 11.52 18,15 15.88 0.71 0.73 0.008 0.27544 2.28 2 5.39 0.06 22.99 0,27 8,61 0.54 0.41 0
1180,4 1.3 13.15 18:93 16.63 0.78 0.79 0,008 0.25828 2.5 2,17 5.59 0.07 28.52 0.29 10.88 0.84 0.43 0
1160.6 1.4 14.84 17.4 17.06 0.85 0.87 0.006 0.23898 2.73 2.35 5.81 0.09 34.94 0.32 13.08 0.77 0.44 0
1180,6 1.5 18.58 17.88 17.49 0.93 0.95 0.006 0.22114 2.98 2.55 8.01 0,1 42.22 0.35 15.81 0.9 0.48 0
1160.7 1.6 18.34 18.35 17.82 1 1.02 0.006 0.20901 3.21 2.72 8.19 0.11 49.87 0.37 18.87 1,04 0.47 0
1160,8 1,7 20.15 18.82 18,35 1.07 1.1 0.006 0.19758 3.43 2,89 6.36 0,13 58.3 0.4 21,83 1.19 0.49 0
1160.9 1.8 22 19.27 18.75 1.14 1.17 0.008 0.18855 3.B6 3.06 8.51 0.15 67.25 0.43 25.18 1.34 0.5 0
1181 1.9 23.9 19,73 19,15 1.21 1.25 0,008 0.17986 3.88 3.22 8,87 0.16 77,07 0.45 28.85 1.51 0.51 0
1181.3 2.2 30.13 25.35 24.68 1.19 1.22 0.006 0.17598 3.82 3.23 6.74 0.18 97.41 0.45 38.47 1.48 0.52 0
1181,4 2.3 32.84 26,13 25,4 1.25 1.28 0.008 0.17003 4.01 3.37 6.86 0.18 110.02 0.47 41.19 1.62 0.53 0
1161.5 2.4 35.2 26.64 25.87 1.32 1.36 0,006 0.16343 4.23 3.53 7 0.19 124.37 0.48 46.58 1.8 0.53 0
1161.6 2.5 37.82 27.19 26.38 1.39 1.43 0.008 0.15807 4.48 3.69 7.11 0.21 139.43 0.52 52.2 1.98 0.54 0
1181.7 2.6 40.48 27.75 28.91 1.48 1.6 0.008 0.15318 4.88 3.84 7.23 0.23 155.37 0.55 68.17 2.18 0.55 0
1181.8 2.7 43.2 28.32 27,44 1.53 1.57 0,006 0.14872 4.91 3.99 7.33 0.25 172.26 0.57 84.5 2.35 0.56 0
1161.9 2.8 45.97 28.87 27.95 1.59 1.64 0.006 0.14463 5.1 4.12 7.44 0.26 189.49 0.6 70.95 2.54 0.57 0
1182 2.9 48.79 29.41 28.45 1,66 1.71 0.006 0.14086 5.33 4,27 7.54 0.28 208.23 0.62 77.88 2.74 0.58 0.8
1182.1 3 51.68 29.95 28.95 1.72 1.78 0.008 0.13736 5.52 4.4 7.63 0.3 227.27 0.84 85.09 2.94 0.58 2.37
1182.2 3.1 54.58 30.52 29.49 1.79 1.85 0.006 0.13412 5.74 4.54 7.72 0.32 247.89 0.67 92.81 3.15 0.59 4.5
1162.3 3.2 57.56 31.22 30.16 1.84 1.91 0.006 0.13141 5.9 4.65 7.8 0.34 287.77 0.89 100.25 3.32 0.59 6.8
1182.4 3.3 80.81 31.92 30.83 1.9 1.97 0.008 0.12885 8.1 4.77 7.88 0.35 289.35 0.71 108.33 3.51 0.6 9.47
1162.5 3.4 63.73 32.81 31.49 1.95 2.02 0.006 0.12671 8.26 4.88 7.95 0.37 310.82 0.73 118.37 3.7 0.6 12.05
1162.6 3.5 66.92 33.59 32.45 1.99 2.06 0.006 0.12494 6.38 4.96 8 0.38 332.03 0.75 124.31 3.83 0.61 14.67
1162.7 3.6 70.2 34.23 33 2.05 2.13 0.006 0.1225 6.58 5.09 8.08 0.4 357.02 0.77 133.67 4.05 0.61 18.74
1162.8 3.7 73.52 34.84 33.29 2.12 2.21 0.006 0.11997 6.8 5.23 8.17 0.42 384.23 0.79 143.85 4.32 0.62 23.47
_..

Planned Bc4 (0+00 - 2+50)
O Ground Points • Bankfull Indicators
Wbkf 20 Dbkf = 1.9
.-
C
O
:_~
N
W
1
1
1
1
Horizontal Distance (ft)
• Water Surtace Points
Abkf 28

1
0

n

C

t
ENTRAINMENT CALCULATION FORM

Stream:
~ r ,~~ ~ f~ .~ ::~,.. ~~ - - -~
Reach: ~ ~~ . ~ ~ -
Team: "' ,~.,; y.n . ~' Date: ,. 'k~... 1. ~`
Information Input Area
~. D50 Riffle bed material D50 (mm)
D"50 Bar sample D50 (mm)
D; Largest particle from bar sample (mm) 0.33 (feet) soa.a mmifoot
Se Existing bankfull water surface slope (ft/ft)
de Existing bankfull mean depth (ft)
~~" R H draulic Radius of Riffle Cross Section (ft
1.65 ys Submerged specific weight of sediment

Calculation of Critical Dimensionless Shear Stress
1.50 D50/D"50 If value is between 3-7 Equation 1 will be used: T*p = 0.0834 D D" ° 87z
( 5~ 50)
2.87 D;/D50 If value is between 1.3-3.0 Equation 2 will be used: T.q = 0.0384(DrD50)~~SS'
0.0151 Tep Critical Dimensionless Shear Stress Equation used: 2

Calculation of Bank full Mean Depth Required for Entrainment of Largest Particle in Bar Sample

1.36 d~ Required bankfull mean depth (ft) d~ = T~~; SD;
Se

1.10 de Existing bankfull mean depth (ft)

Calculati on of BKF Water Surtace Slope Required for Entrainment of Largest Particle in Bar Sample

0.0074 S~ Required bankfull water surface slope (ft) S~ = 7t~ SD'
de

0.0060 Se Existing bankfull water surface slope (ft)

Sediment Transport Validation
0.36 Bankfull Shear Stress T~ =y RS (Ib/ft2) y =Specific Weight of water = 62.4 Ibs/ft3

72 Moveable particle size (mm) at bankfull shear stress (predicted by the Revised Shields Diagram by
Ros en, 2006

0.62 Predicted shear stress required to initiate movement of D; (mm) (see Revised Shields Diagram,
Ros en, 2006
Note: If available bankfull shear stress exceeds D100 of bed, degradation potential exists.
1

r
1
1
1
1
Velocity computation form(Snow Creek (0+00 - 2+50)
Velocit~~ Compafation Form

~~§

~,

~~ .
Generated: 9/19/20061:42 PM
Stream Name: SNOW CREEK (C. L. WHITE F
Stream Location: SURRY COUNTY, NC
Station: 0+00 - 2+50 (B/4c STEAM TYPE
SLOPE FOR STREAM REACH = 0.6°/a
Date: 8/1/2006
In ut Variables Ou ut Varia bles
Cross-section area (Ah~ 28 ft Mean Depth (db~ 1.40 ft
Width (Wb~) 20 ft Wetted Perimeter (WP) 21.00 ft
D84 (Riffle) 9S mm D84 0.31 ft
Slope (Sb~ 0.006 ft/ft Hydraulic Radius (R) 1.35 ft
Gravitational Acceleration () 32.2 ft/s2 R/D84 4.33 ft1ft
R/D84, Wu*, Mannin s n
U/u* = 6.5 ft/S/ft1S Using R/D84; Reference Reach Field Book, p.188; River Field Book, p.233
Mannmg~S ri = 0.037 (Reference Reach Field Book, p.189; River Field Book, p.236)
Velocity = 3.8 ft/S From Meaning's equatioau={1.49R~S'o~n
Wu*=2.83+5.710 84)

Velocity = 3.3 ft/s n~•(2.s3+s.7lag(R/D841]
Jarrett's E uation for estimatin Mannin 's n
n = O.1 n= 0.39SosaRo.i6
VelOCl = 2.6 ft/S From Meaning's equation u~1.49R~S~n~n
Mannin 's n b Stream T e for lar a rivers)
Stream T e ' B/4
Mamun ~S n = 0.037 Reference Reach Field Book, p.187; River Field Book, p.237
Veloci = 3.8 ft/S Fmm Meaning's equation u°(1.49R~S~~Nn
Validate veloci calculations usin the Continui E uation
Drainage Area (mil) 2 Ga a Station
Discharge (Qh~) cfs 98 cfs
Veloci (u = Q/A) ft/s 3.5 ft1s

C. L. WHITE PROPERTY, SURRY COUNTY, NC
SNOW CREEK B4 STREAM TYPE sta. 0+00 - 2+50
Bankfull Shear Stress Calculation:
Hydraulic Radius (ft) 1.36
Slope (ft/ft) 0.008
T = (Ibs/ftz) 0.64
y = 0.5656Ln(x) + 2.98
Min. Rock Size = (ft) 2.724
Min. Rock Vol. (ft3) 20.223
Min. Rock Weight 2224.510
(assume 1101bs1ft3)

~ EXISTING CHANNEL - B4c

C

0

1

Stream Classification Form

Stream Channel Classification (Level II) ...
Stream NAME: Snow Creek, Reach - C L White -Impacted
Basin NAME: Drainage AREA: 1280 acre 2 miZ
Location:
Twp: Rge: Sec: Qtr: Lat: 36.3692 Long: 80.791
Observers: Date: 6/7/2006

BankfuII WIDTH (Wb~ 19.7 Feet
WIDTH of the stream channel, at bankfulI stage elevation, in a riffle section.

Mean DEPTH (db~ 1.39 Feet
M,7ean eDE~P7tT7H of the stream channel cross-section, at banldull stage elevation, in a rifle section.
(`~bi~~'ekP •• bl~

Banl~uIl Cross Section Area (App 27.32 Feetz
AREA of the stream channel cross-section, at banldull stage elevation, in a rifle section.

WIDTH /DEPTH RATIO (Wb~ /db~ 14.17 Ft/Ft
Banldull WIDTH divided by bankfull mean DEPTH, in a riffle section.

Mazimum DEPTH (dm~ 2 Feet
Maximum depth of the bankfull channel cross-section, or elevation between the banldull stage and
thalweg in a riffie section.

Flood-Prone Area WIDTH (Wh,~ 32.5 Feet
The stage/elevation at which flood-prone area WIDTH is detemuned in a riffle section at twice
maximum DEPTH, or (2 x d~

- Entrenchment RATIO (ER) 1.65 Ft/Ft
The ratio of flood-prone area WIDTH divided by bankiall channel WIDTH (W~/Wb~ in a rifle
section.

Channel Materials (Particle Size Indez) D50 23.54 mm
The 50th percentile, or less than, from a pebble count frequency distribution of channel particles
representing the median or dominant particle size.

Water Surface SLOPE (S) 0.00626 FUFt
Average water surface slope as measured between the same position of bed features in the profile
over two meander wave lengths. This is similar to average banldull slope.

Channel SINUOSITY (I~ 1.15
Sinuosity: an index of channel pattern, determined from stream length /valley length, i.e. (SL/VL);
or estimated from a ratio of valley slope divided by channel slope (VS/ S).

Stream Type
B 4c For Referer-ce, seepage 5-5, 5-6.
R~,e,,, ,~_ ,,,~,,,~,~,.
© 2005 Wildland Hydrology

Reference Reach Summary Data Form
... and Reference Reach Summary Data
Mean Riffle Depth (db~ 1.46 tfeet Mean Riffle Width (Wb~ •'. 2275; feet Mean Riffle Area (Abp ~ 27.32;feet~
~ Mean Pool Depth (db~) 1.53;feet Mean Pool Width (Wb~) 23.8;feet Mean Pool Area (Abp) :36.4; fez
0
c
~ Ratio Mean Pool ~ ~ db~
Depth/Mean Riffle Depth ~ 1.048~~ Ratio Pool Width/R.iffle ~ ~ Wb~
Width ~ 1.046,Wb~ Ratio Pool Area/
Riffle Area 1.3321A6~
;Abp

~ Max Riffie Depth (dam 2;feet Max Pool Depth (dm~~ ~ 2.45; feet Max riffie depth/Mean riffle depth; 1.37
c
~ Max pool deptb/Mean riffle depth; 1.678 Point Bar Slope 0
U
`
Streamflow: Estimated Mean Velocity at Banldull Stage (Ublfl 1 3.651ft/s
Estimation Method
I

Streamflow: Estimated Discharge at Banldull Stage (Qb~ 98~cfs Drainage Area 2;miZ

Geomet Ave Min Max Dimensionless Geomet Ratios Ave Min Max
~ Meander Length (Lm) 156r 89; 224~feet Meander Length Ratio (Lm/W6~ 6.857 3.912 9.846

m
~
Radius of Curvature (Rc) 38; 14.7; 613;feet ~p
Radius of Curvature/Riffle Width (Rc/Wb~
1.670; 0.646; 2.695
D_
Belt Width bit) ; 49; 39; 60; feet !~I~ `
Meander Width Ratio \ •• b~t~bk£1
; 2.154; 1.714; 2.637

c
~
Individual Pool Length 1 32.871 14.24; 48.29:feet
Pool Length/Riffle Width
1 1.445; 0.6261 2.123
U
Pool to Pool Spacing ~ 74.59 30.74 132.3 ~ feet Pool to Pool Spacing/Riffle Width ~ 3279 1351 ~ 5.814

Valley Slope (VS) 0.0069 ;ft/ft Average Water Surface Slope (S) 0.00626 ;ft/ft Sinuosity (VS/S) 1.15

Stream Length (SL)1 0 (feet Valley Length (VL) 1 0 (feet Sinuosity (SL/VL) 1 #####

Low Bank Height start___ O~feet
----~
(LBH) end: O~feet Max Riffle ~; 0;f~
r-----~
Depth ends Olfeet Bank Height Ratio ~^

(LBH/Max Riffle Depth) ends #####s
Facet Slo es -Ave Min Max Dimensionless Slo Ratios Ave Min Max
RifIle Slope (S,;~ ;0.01I 1;0.0021;0.0218;ft/ft Riffle Slope/Average Water Surface Slope (S,;i/S) 1.778; 0.331; 3.486;

,~ Run Slope (5,,,~ ;0.0067;0.0035;0.0097;ft/ft Run Slope/Average Water Surface Slope (S„m/S) 1.069; 0.558; 1.548;
0
L
~-
Pool Slope (Sp) 10.0006.000110.0011 Ift/ft
Pool Slope/Average Water Surface Slope (SP/S)
1 0.1011 0.0221 0.1691
a>
Glide Slope (S~ ~.0048~.0020~.00901ft/ft Glide Slope/Average Water Surface Slope (Sg/S) 1 0.7731 0312 1.431
U Feature Mid oint' Ave Min Max Dimensionless Depth Ratios Ave Min Max
Riffle Depth (dm,;~ ~ 2.000 2.000 2.000feet Riffle Max Depth/Riffle Mean Depth (dm,;t/db~ i 1370 1.370 1370
Run Depth (dam 1.840; 1.610; 2.OOO;feet Run Max Deptb/Riffle Mean Depth (dm„m/db~ 1.260; 1.103; 1370;

Pool Depth (dIDp) ; 2.450; 1.880; 3.030; feet Pool Max Depth/Riffle Mean Depth (dn,P/db~ 1.678; 1288; 2.075;
Glide Depth (d°,~ 1 1.7701 L5701 1.8801feet Glide Max Deptb/Riffle Mean Depth (d~/db~ 1 1.2121 1.0751 12881

Catagories Reachb Riffle` Bar Indices Reachb Riffle` Bay'
w % Silt/Clay 0 0 0 Dl6 0.8 13.01 7.57 ;mm

Sand 26 4 0 ; D35 10.2 22.6 2029 ;mm
m
~
a>

U %Gravel 51 72 72.44 1 D50 23.54 34.79
'
Cobble 21 21 27.56 ~ D84 102.67 95.43
%Boulder 2 3 0 ~ D95 180 205.33
%Bedrock 0 0 0 D100 361.99 362 31.92 Imm

83.44 ~mm
101.71 ;mm
I10 ;mm
a. The range of "feature" mid-point maximum bankfull depths, including the mmunum, maximum and average values.
(Pool depths are obtained from the deepest portion bf the feature.)
b. A composite sample of materials from riffle and pool featutes taken within the designated reach.
c. Sample obtained within the "active" bed of a riffle feature at the location of the cross section.
© 2005 Wildland Hydrology

n

Il
ENTRAINMENT CALCULATION FORM
Stream: S `ov~~ ~ ~" ~.~ .N~ ~ ~a Reach: ~
._ v _ ,..
Team: ,,, - .~~ Date: _ ~ ~ ~~ ~~
Information Input Area
D50 Riffle bed material D50 (mm)
D"SO Bar sample D50 (mm)
D; Largest particle from bar sample (mm) 0.33 (feet) ~•$ mm/foot
•~ ~ SQ Existing bankfull water surface slope (ft/ft)
de Existing bankfull mean depth (ft)
;fir . ~ R H draulic Radius of Riffle Cross Section (ft
1.65 gs Submerged specific weight of sediment

Calculation of Critical Dimensionless Shear Stress
1.09 D50/D"50 If value is between 3-7 Equation 1 will be used: t 4 = 0.0834(D~/D"SO)-0.$'Z
2.87 D;/D50 If value is between 1.3-3.0 Equation 2 wilt be used: t a = 0.0384([1,/D~)-0~~'
0.0151 to Critical Dimensionless Shear Stress Equation used: 2

Calculation of Bank full Mean Depth Required for Entrainment of Largest Particle in Bar Sample

1.36 d~ Required bankfulf mean depth (ft) d~ _~ ~i
Se
de/d~ Existing mean bankfull depth Stable
0.96 R uired mean bankfull depth (d/d~ = 1)
Stable Vertical Stabil" of Stream

Calculati on of BKF Water Surface Slope Required for Entrainment of Largest Particle in Bar Sample

0.0063 S~ Required bankfull water surface slope (ft) S~
d
e

0.96 Se/S~ Existing water surface slope
Required water surface slo Stable
(S/S~ = 1)
Stable Vertical Stabili of Stream

Sediment Transport Validation
0.46 Bankfull Shear Stress tc =gRS (Ib/fi2) g =Density of water = 62.4 Ibs/ft3

88 Moveable particle size (mm) at bankfull shear stress (predicted by the Shields Diagram: Blue field
book: 238, Red field book: 190)

0.56 Predicted shear stress required to initate movement of D; (mm) (see Shields Diagram: Blue field
book: 238, Red field book: 190

Pool @ 4+40
o Ground Points • Bankfull • Water Surface
Indicators Points
Wbkf = 23.8 Dbkf = 1.5 Abkf = 36.4
11
11
.--
O
.~
~ 11
N
W
11
11
Horizontal Distance (ft)

0 10 20 30 40

1
1
.-
C
O
N
_N ~
W
1
Distance along stream (ft)
• CH
o WS
• BKF
• LEW
o P2
+ P3
x P4

C.L. White -Existing Profile -Upper Reach

1
1

0

ii

DESIGN - C4

MORPHOLOGICAL CHARACTERISTICS OF THE EXISTING AND PROPOSED
' CHANNEL WITH REFERENCE REACH DATA
(After Rosgen, 1996)
Restoration Site (Name of stream ~ location): Snow Creek, Surry County
Reference Reach (Name of stream ~ location): Long Hope Branch (2.2 sq. mi.), Watauga County
' North Prong South Fork Mitchell River (3.5 sq. mi.), Surry County
~.
VARIABLES EXISTING PROPOSED REFERENCE
CHANNEL REACH REACH
1. Stream type C4 C4 C4
2. Drainage area 2 2 2.2
s . mi.
3. Bankfull width Mean: 24.3 Mean: 20 Mean: 16.3
(wbkf) - ft.
Range: Range: Range: 16 -16.3
4. Bankfull mean Mean: 1.1 Mean: 1.4 Mean: 1.5
depth (dam) - ft.
Range: Range: Range: 1.4 -1.6
5. Width/depth Mean: 22.1 Mean: 14.3 Mean: 10.0
ratio (wbkr/dbkf)
Range: Range: Range: 10.4 -11.4
6. Bankfull cross- Mean: 26.8 Mean: 28 Mean: 24.8
sectional area Range:
Abp - s . ft: Range: Range: 22.7 - 27
7. Bankfull mean Mean: 3.65 Mean: 3.65 Mean: 4.0
velocity (vb,~) - f/s
Range: Ran e: Ran e:
8. Bankfull discharge, g$ 98 107
CfS Qbk{
9. Bankfull Mean: 2.1 Mean:2 Mean: 2.15
Maximum depth
dm _ ft Range: 2.02 - 2.12 Range: Range: 2.1 - 2.2
10. Max d~r~dbkf ratio Mean: 1.5 Mean: 1.42 Mean: 1.45
Ran e: Ran e: 1.4 -1.5 Ran e: 1.4 -1.5
11. Riffle Length (L~ff) Mean: 16.3 Mean: 40 Mean: 33.2
_ ft. Range: 7 - 27 Range: 28 - 98 Range: 7.6 - 81
12. Ratio riffle length Mean: 0.7 Mean: 2 Mean: 2
to bkf width Range: 0.3 -1.1 Range: 0.5 - 4.9 Range: 0.5 - 4.9
(Lriff ~--bkf
13. Low bank height Mean: 1.1 Mean: 1.0 Mean: 1.0
to max. d~ ratio Range: Range: Range:
14. Width of Mean: 32.5 Mean: 66 Mean: 202.5
flood prone area
w a _ ft Range: . Range: 50 - 80 Range:
15. Entrenchment Mean:1.4 Mean: 3.3 Mean: 12.4
ratio (w~/wb,~) Range: Range: 2.5 - 4.0 Range: 9.8 -15
Page 1 of 5 09/18/06

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1

1

1

fl
1

1
VARIABLES EXISTING PROPOSED REFERENCE
CHANNEL REACH REACH
16. Meander length Mean: 156 Mean: 240 Mean: 196
(gym) _ ft. Range:89 -224 Range: 160 - 320 Range: 128 - 266
17. Ratio of Mean: 6.5 Mean: 12 Mean: 12
meander length
to bankfull Range: 3.7 - 9.3 Range: 8 -16 Range: 8 - 16
width L,T,/wb,~
18. Radius of Mean: 38 Mean: 60 Mean: 64.9
curvature (R~) -
ft Range: 14.7 - 61.3 Range: 44 -120 Range: 32 - 97.8
19. Ratio of radius Mean: 1.6 Mean: 3 Mean: 3
of curvature to
bankfull width Range: 0.6 - 2.6 Range: 2.2 - 6 Range: 2 - 6
Rdwbkf
20. Belt width (wb,~ Mean: 49 Mean: 84 Mean: 57.7
- ft.
Range: 39 - 60 Range: 44 -120 Range: 42 - 77
21. Meander width Mean: 2.0 Mean: 4.2 Mean: 3.6
ratio (wbn/wb,~)
Range: 1.6 - 2.5 Range: 2.2 - 6.0 Range: 2.6 - 4.7
22. Sinuosity = k 1.15 1.15 1.7
(Stream Lengthf,,a,,~/
valle distance
23. Valley slope 0.0069 0.0069 0.0153
ft/ft
24. Average water 0.006 0.006 0.009
surface slope-ft/ft
(Sav = Svalle k
25. Pool slope Mean: 0.0006 Mean: 0.0009 Mean: 0.00373
(sue,) - ft/ft
Range: 0.0002 - 0.0009 Ran e: 0.0006 - 0.0012 Ran e:0.00 - 0.0107
26. Ratio of pool Mean: 0.1 Mean: 0.15 Mean: 0.3985
slope to
average slope Range: 0.03 - 0.15 Range: 0.1 - 0.2 Range: 0 -1.15
s I/Sbkf
27. Maximum Mean: 3.1 Mean: 3.5 Mean: 2.4
pool depth
d ,r,~ of - ft Range: 2.9 - 3.3 Range: 2.5 - 4.2 Range: 2.3 - 2.4
28. Ratio of pool Mean: 2.8 Mean: 2.5 Mean: 2.1
depth to
average Range: 2.6 - 3.0 Range: 1.8 - 3.0 Range: 1.8 - 2.5
bankfull depth
dmax ~dbkf
29. Pool width Mean: 23.8 Mean: 22 Mean: 17.9
yy I _ ft, Range: Range: 18 - 23 Range:
30. Ratio of pool Mean: 1.0 Mean: 1.1 Mean: 1.1
width to
bankfull width Range: Range: 0.9 - 1.15 Range: 0.9 -1.15
(w oJwbkf
31. Pool Area - sq ft Mean: 36.4 Mean: 42 Mean: 36.2
I Range: Range: 39.2 - 44.8 Range: 35.3 - 37.1
Page 2 of 5 09/18/06
~.

D

VARIABLES EXISTING PROPOSED REFERENCE
CHANNEL REACH REACH
32. Ratio of Pool Mean: 1.35 Mean: 1.5 Mean: 1.5
Area to Bankfull
Area A ,/Ab,~ Range: Range: 1.4 - 1.6 Range: 1.4 -1.6
33. Pool to pool Mean: 107 Mean: 122 Mean: 97.5
spacing (p-p) -
~ Range: 82 - 140 Range: 84 -160 Range: 68.3 -127.4
34. Ratio of p-p Mean: 4.4 Mean: 6.1 Mean: 6
spacing to
bankfull width Range: 3.4 - 5.8 Range: 4.2 - 8.0 Range: 4.2 - 7.8
/wbkf
35. Pool length (L~,) Mean: 38 Mean: 22 Mean: 17.4
_ ft. Range: 62.6 - 80.2 Range: 10 - 40 Range: 7.7 - 32.6
36. Ratio of Pool Mean: 1.6 Mean: 1.1 Mean: 1.1
length to
bankf
ull width Range: 2.6 - 3.3 Range: 0.5 - 2.0 Range: 0.5 - 2.0
~
V rrbkf
37. Avg. riffle slope Mean: 0.041 Mean: 0.012 Mean: 0.0126
s,~ - ft./ft. Range: 0.014 - 0.072 Range: 0.005 - 0.013 Range: 0.006 - 0.017
38. Ratio of riffle Mean: 6.8 Mean: 2.0 Mean: 1.35
slope to avg.
slo a s,;~/s~, Range: 2.3 -12.0 Range: 1.3 - 2.2 Range: 0.63 -1.8
39. Avg. run slope Mean: 0.037 .Mean: 0.0096 Mean: 0.0146
{~ Range: 0.013 - 0.061 Range: 0.004 - 0.013 Range: 0.005 - 0.022
40. Ratio of run Mean: 6.2 Mean: 1.6 Mean: 1.6
slope to avg
slo a s~,~/sa„ Range: 2.2 -10.2 Range: 1.4 - 2.2 Range: 0.6 - 2.4
41. Avg. glide slope Mean: 0.0047 Mean: 0.0012 Mean: 0.0054
ft/ft Range: 0.0042 - 0.0056 Range: 0.0009 - 0.0018 Range: 0.001 -
0.0158
42. Ratio of glide Mean: 0.8 Mean: 0.2 Mean: 0.58
slope to avg
sloes ,;~/sa„ Range: 0.7 - 0.9 Range: 0.15 - 0.3 Range: 0.12 -1.68
43. Max run depth Mean: 2.37 Mean: 2.5 Mean: 2.0
dm~ ~~~ _ ft. Range: 2.1 - 2.6 Range: 2.24 - 3.1 Range: 1.9 - 2.1
44. Ratio of max. run Mean: Mean: 1.8 Mean: 1.3
depth to mean bkf
de th dm~ tin/db,~ Range: Range: 1.6 - 2.2 Range: 1.25 -1.3
45. Run width (w~,,,) Mean: Mean: 20 Mean: 21.3
_ ft. Range: Range: 16 - 22 Range: 20.4 - 22.2
46. Run width to Mean: Mean: 1.0 Mean: 1.3
bankfull width Range: Range: 0.8 -1.1 Range: 1.25 -1.4
ratio wti~bkf
47. Mean run depth Mean: Mean: 1.5 Mean: 1.4
dti~ ft, Range: Range: Range: 1.25 -1.4
48. Run w/d ratio Mean: Mean: 13.3 Mean:
w~,„/dN~ Range: Range: Range:
49. Ratio of run w/d Mean: Mean: 0.93 Mean: 0.93
to riffle w/d Range: Range: Range:
50. Run length (L~,~) Mean: Mean: 10 Mean:12.2
_ ft. Range: Range: 4 - 16 Range: 4.0 - 22.7
Page 3 of 5
09/18/06

VARIABLES EXISTING PROPOSED REFERENCE
CHANNEL REACH REACH
51. Ratio of run Mean: Mean: 0.5 Mean: 0.75
length to bankfull Range: Range: 0.2 - 0.8 Range: 0.25 -1.4
width L~,~/wb;~
52. Max. glide depth Mean: Mean: 1.5 Mean: 2.3
dmax rae) _ {{_ Range: Range: 1.3 -1.7 Range: 1.8 - 2.6
53. Ratio of max. Mean: Mean: 1.1 Mean: 1.1
glide depth to
mean bkf depth Range: Range: 0.9 -1.2 Range: 0.9 -1.2
dmax lide/dbkf
54. Glide width Mean: Mean: 24 Mean: 26.1
w lids _ ft_ Range: Range: 20 - 26 Range: 24 - 28.2
55. Ratio of glide Mean: Mean: 1.2 Mean: 1.6
width to bankfull Range: Range: 1.0 -1.3 Range: 1.5 -1.7
width W lide/wbkf
56. Glide mean Mean: Mean: 1.0 Mean: 1.57
de th d lids - ft• Range: Range: Range:1.5 -1.6
57. Glide w/d ratio Mean: Mean: 24 Mean: 16.6
w lide/d tide Range: Range: Range:
58. Ratio of glide w/d Mean: Mean: 1.7 Mean: 1.7
to riffle w/d Range: Range: Range:
59. Glide length Mean: Mean: 18 Mean: 13.3
ride - ft• Range: Range: 8 - 24 Range: 5.7 - 23.5
60. Ratio of glide Mean: Mean: 0.9 Mean: 0.82
length to bankfull
width lide/wbkf Range: Range: 0.4 -1.2 Range: 0.36 -1.4
MATERIALS:
1. Particle Size
Distribution of
Channel Material
mm
D 16 0.8 1.0
D 35 10.2 16.0
D 50 23.5 26.0
D 84 102.7 56.9
D 95 180 128
' Remarks: The values calculated and shown on these pages are for the C4 section
beginning at station 2+50 and continuing to station 5+50.
Page 4 of 5 09/18/06

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I
VARIABLES EXISTING PROPOSED REFERENCE
CHANNEL REACH REACH
MATERIALS:
2. Particle Size
Distribution of
Riffle Bed
Material mm
p 16 13 13 10.5
D ss 22.6 22.6 29.4
D so 34.8 34.8 41.75
D ~ 95.4 95.4 142.9
D 95 205.3 205.3 245.1
3. Particle Size
Distribution of
Bar Material mm EXISTING
CHANNEL PROPOSED
REACH REFERENCE
REACH
p 16 7.6 7.6
D ss 20.3 20.3
D so 31.9 31.9
D 84 83.5 83.5
D 95 101.7 101.7
Largest size particle
at the toe (lower third)
of bar mm 110 110
SEDIMENT TRANSPORT VALIDATION
(BASED ON BANKFULL SHEAR STRESS)
Existin Condition
Pro osed Condition
Bankfull shear stress -Calculated value (Ib/ft) 0.46 0.51
Critical shear stress -Value from Shields Diagram(Ib/ )
OR Grain Diameter from Shields Diagram (mm)
Relation ad'usted to include field data 88mm 95mm
Critical dimensionless shear stress 0.015 0.015
Minimum mean db,~ calculated using critical
dimensionless shear stress a uations 1.36 1.4
Manning's "n" 0.04 0.04
'Tfiese values and ratios were calculated and proposed by:
Name: Alan Walker
Stream Walker Consulting Date: Auaust, 2006
' _ Page 5 of 5 09/18/06

C4 Riffle 2+50-5+50
ELEV DEPTH AREA WET PER WIDTH HYD RAD MEAN D SLOPE ROUGH R/D84 VELOCITY U/U' U^2/2g DISCHARGE SHEAR POWER POWER/W FROUDE TRANSPORT
(ft) (ft) (sq ft) (ft) (ft) (ft) (ft) (ft/ft) If] (fps) (ft) (cfs) (psi (Ib/s) (Ib/ft/s) (Ib/s)
1159,2 0.1 0.1 2.04 2.03 0.05 0.05 0.006 6.01802 0.16 0.11 1.15 0 0.01 0.02 0 0 0.09 0
1159.3 0.2 0.41 4.3 4.28 0.1 0.1 0.006 24.15832 0.32 0.08 0.58 0 0.03 0.04 0.01 0 0.04 0
1159.4 0.3 0.96 6.8 6.78 0.14 0.14 0.008 3.70973 0.45 0.24 1.47 0 0.23 0.05 0.09 0.01 0.11 0
1159.5 0.4 1.75 8.73 8.69 0.2 0.2 0.006 1.5072 0.64 0.45 2.3 0 0.79 0.07 0.3 0.03 0.18 0
1159.6 0.5 2.68 9.93 9.88 0.27 0.27 0.006 0.89367 0.86 0.68 2.99 0.01 1.83 0.1 0.69 0.07 0.23 0
1159.7 0.6 3.71 10.78 10.69 0.34 0.35 0.008 0.82468 1.09 0.92 3.58 0.01 3.4 0.13 1.27 0.12 0.27 0
1159.8 0.7 4.82 11.58 11.46 0.42 0.42 0.006 0.49721 1.34 1.14 4.01 0.02 5.51 0.16 2.06 0.18 0.31 0
1159.9 0.8 5.98 12.04 11.88 0.5 0.5 0.006 0.4106 1.6 1.37 4.41 0.03 8.22 0.19 3.08 0.28 0.34 0
1180 0.9 7.2 12.83 12.82 0.58 0.57 0.006 0.35752 1:79 1.58 4.73 0.04 11.2 0.21 4,19 0.33 0.38 0
1160.1 1 8.53 14,11 13.89 0.6 0.61 0.006 0.3293 1.92 1.68 4.93 0.04 14.31 0.22 5.38 0.38 0.38 ~ 0
1160.2 1.1 9.98 15.3 15.06 0.65 0.66 0.006 0.30301 2.08 1.82 5.14 0.05 18.17 0.24 6.8 0.45 0.39 0
1180.3 1.2 11.52 18.15 15.88 0.71 0.73 0.008 0.27651 2.27 1.98 5.38 0.06 22.95 0.27 8.59 0.54 0.41 0
1160.4 1.3 13.15 16.93 18.63 0.78 0.79 0.006 0.25724 2.49 2.16 5.58 0.07 28.47 0.29 10.68 0.64 0.43 0
1160.5 1.4 14.84 17.4 17.06 0.85 0.87 0.006 0.23784 2.72 2.35 5.8 0.09 34.88 0.32 13.06 0.77 0.44 0
1160.6 1.5 18.58 17.88 17.49 0.93 0.95 0.006 0.22181 2.97 2.55 6 0.1 42.15 0.35 15.78 0.9 0.48 0
1160.7 1.8 18.34 18.35 17.82 1 1.02 0.006 0.20972 3.19 2.71 8.18 0.11 49.78 0.37 18.64 1.04 0.47 0.01
1160.8 1.7 20.15 18.82 18.35 1.07 1.1 0.008 0.19822 3.42 2.89 8.35 0.13 58.2 0.4 21.79 1.19 0.49 0.4
1180.9 1.8 22 19.27 18.75 1.14 1.17 0.006 0.18916 3.64 3.05 6.5 0.14 67.14 0.43 25.14 1.34 0.5 0
1181 1.9 23.9 19,73 19.15 1.21 1.25 0.006 0.18043 3.87 3.22 8.66 0,16 76.95 0.45 28.81 1.5 0.51 0
1161.1 2 25.83 20.1 B 19.56 1.28 1.32 0.008 0.17341 4.08 3.38 6.79 0.18 87.25 0.48 32.66 1.67 0.52 0
1181.2 2.1 28 20.63 19.96 1.35 1,4 0.006 0.18713 4.31 3.53 6.92 0.19 98.26 0.51 38.78 1.84 0.53 0
1161.3 2.2 30.13 25.35 24.66 1.19 1.22 0.008 0.17653 3.8 3.23 6.73 0.16 97.25 0.45 38.41 1.48 0.51 0
1181.4 2.3 32.84 28.13 25.4 1.25 1.28 0.006 0.17055 3.99 3.37 6.85 0.18 109.86 0.47 41.13 1.62 0.52 0
1161.5 2.4 35.2 26.84 25.87 1.32 1.36 0.006 0.16392 4.22 3.53 6.99 0.19 124.18 0.49 48.49 1.8 0.53 0
1161.8 2.5 37.82 27.19 26.38 1.39 1.43 0.006 0.15853 4.44 3.68 7.1 0.21 139.23 0.52 52.13 1.98 0.54 0
1161.7 2.6 40.48 27.75 26.81 1.46 1.5 0.006 0.15363 4.68 3.83 7.22 0.23 155.14 0.55 58.08 2.16 0.55 0
1161.8 2.7 43.2 28.32 27.44 1.53 1.57 0.006 0.14915 4.89 3.98 7.32 0.25 172.02 0.57 84.4 2.35 0.56 0
1161.9 2.8 45.97 28.87 27.95 1.59 1.64 0.006 0.14504 5.08 4.12 7.43 0.26 189.22 0.6 70.85 2.53 0.57 0
1182 2.9 48.79 29,41 28.45 1.66 1.71 0.006 0.14125 5.3 4.26 7.53 0.28 207.94 0.62 77.85 2.74 0.57 8.2
1162.1 3 51.68 29.95 28.95 1.72 1.78 0.006 0.13774 5.5 4.39 7.62 0.3 226.95 0.64 84.97 2.94 0.58 7.84
1162.2 3.1 54.58 30.52 29.49 1.79 1.85 0.006 0.13449 5.72 4.54 7.71 0.32 247.55 0.67 92.68 3.14 0.59 10.31
1162.3 3.2 57.56 31.22 30.16 1.84 1.91 0.006 0.13176 5.88 4.85 7.79 0.34 267.42 0.89 100.12 3.32 0.59 12.37
1162.4 3.3 60.61 31.92 30.83 1.9 1.97 0.006 0.12919 6.07 4.77 7.87 0.35 288.87 0.71 108.19 3.51 0.8 15.11
1162.5 3.4 63.73 32.61 31.48 1.95 2.02 0.008 0.12704 6.23 4.87 7.94 0.37 310.41 0.73 116.22 3.68 0.6 17,72
1162.6 3.5 66.92 33.59 32.45 1.99 2.06 0.008 0.12526 6.36 4.96 7.99 0.38 331.61 0.75 124.15 3.83 0.61 20.9
1162.7 3.8 70.2 34.23 33 2.05 2.13 0.006 0.12282 6.55 5.08 8.07 0.4 356.56 0.77 133.49 4.05 0.61 23.95
1162.8 3.7 73.52 34.64 33.29 2.12 2.21 0.006 0.12028 8.77 5.22 8.16 0.42 363.73 0.79 143.67 4.32 0.62 28.41

1

C
O
N
W
1
1
Horizontal Distance (ft)

Planned C4 (2+50 - 5+50)
O Ground Points • Bankfull Indicators • Water Surface Points
Wbkf 20 Dbkf = 1.4 Abkf 28

C

1

r~

1

1
1
ENTRAINMENT CALCULATION FORM
Stream: 4 -0~~. ~ C ~3. .z _;_

~~ -
.
Team. ' ~ T ,. ~ ~°~ .~ <~ ._ ~..
~. ~ . .. 3 -_:,. ... ,.> H ~_ .~t-,
r Reach: :v~ ~x h ,l~`,, ~;`t`~

.

~ x sR.. ~: ., ~ ..~..: - ,ter ..
Date: :_ . '~~_. ~,.. f ~.~
Information Input Area
_ ~::
D50 Riffle bed material D50 (mm)
D"50 Bar sample D50 (mm)
D; Largest particle from bar sample (mm) 0.33 (feet) soa.s mmffoot
Y~: Se Existing bankfull water surface slope (ft/ft)
de Existing bankfull mean depth (ft)
s 5 R H draulic Radius of Riffle Cross Section ft
1.65 ys Submerged specific weight of sediment

Calculation of Critical Dimensionless Shear Stress
1.50 Dso/D~so If value is between 3-7 Equation 1 will be used: T*a = 0.0834(D50/D"SO)-o.s~z
2.87 D;/Dso If value is between 1.3-3.0 Equation 2 will be used: Tfp = 0.0384(D;/Dso)~~$$'
0.0151 T~G Critical Dimensionless Shear Stress Equation used: 2

Calculation of Bankf ull Mean Depth Required for Entrainment of Largest Particle in Bar Sample

1.36 d~ Required bankfull mean depth (ft) d~ = T*01 SD'
Se

1.10 de Existing bankfull mean depth (ft)

Calculation of BKF Water Surface Slope Required for Entrainment of Largest Particle in Bar Sample

0.0074 S~ Required bankfull water surface slope (ft) S~ = T~~; SD;
de

0.0060 Se Existing bankfull water surface slope (ft)

Sediment Transport Validation
0.36 Bankfull Shear Stress T~ =yRS (Ib/ft2) y =Specific Weight of water = 62.4 Ibs/ft3

72 Moveable particle size (mm) at bankfull shear stress (predicted by the Revised Shields Diagram by
Ros en, 2006

0.62 Predicted shear stress required to initiate movement of D; (mm) (see Revised Shields Diagram,
Ros en, 2006
Note: If available bankfull shear stress exceeds D~oo of bed, degradation potential exists.

Velocity computation forn(Snow Creek (2+50 - 5+50)
Velocity Computation Form
Stream Name: SNOW CREEK C. L. WHITE FARM)
Stream Location: SURRY COUNTY, NC
Station: 2+50 - 5+50 (C/4 STEAM TYPE)
SLOPE FOR STREAM REACH = 0.6%
Date: 8/1/2006
In ut Variables Ou ut Varia bles
Cross-section area (Abp 28 ft Mean Depth (dh~ 1.40 ft
Width (Why) 20 ft Wetted Perimeter (WP) 21.00 ft
D84 (Riffle) 102 mm D84 0.33 ft
Slope (Sb~) 0.006 ft/ft Hydraulic Radius (R) 1.35 ft
Gravitational Acceleration () 32.2 ftJs2 R/D84 4.03 ft/ft
R/D84, Wu*, Mannin s n
u/u* = 6.3 ft/S/ft/S Using R/D84; Reference Reach Field Book, p.188; River Field Book, p.233
Mannm 's n = 0.03 8 (Reference Reach Field Book, p.189; River Field Book, p236)
Veloci = 3.7 ft/S From Manning's equation u=(1.49Rz3S'2)/n
Wu*=2.83+5.710 84)

Veloci = 3.2 ft/S u~r•[2.83+5.71og(R/D84)]
Jarrett's E uation for estimatin Mannin 's n
n = 0.1 a= 0.395°'3sR-0.'6
VelOCl = 2.6 ft/S FromManningsequationu=(1.49R~S''~n
Mannin 's n b Stream Ty a for lar a rivers)
Stream T e C/4
Manning's n = 0.031 Reference Reach Field Book, p.187; River Field Book, p.237
Velocity = 4.5 ft/s From Manning's equation u=(1.49RZOS'~')/n
Validate veloci calculations usin the Continui E uation
Draina a Area (mil) 2 Ga a Station
Discharge (Qh~ cfs 98 cfs
Velocity (u = Q/A) ft/s 3.5 ft/s
' Generated: 9/19/2006 1:50 PM

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1
1
1
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1
1
1
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1
C. L. WHITE PROPERTY, SURRY COUNTY, NC
SNOW CREEK C4 STREAM TYPE sta. 2+50 - 5+50
Bankfull Shear Stress Calculation:
Hydraulic Radius (ft) 1.36
Slope (ft/ft) 0.006
T = (Ibs/ft2) 0.51
y = 0.5656Ln(x) + 2.98
Min. Rock Size = (ft) 2.598
Min. Rock Vol. (ft3) 17.541
Min. Rock Weight 1929.460
(assume 1101bs/ft3)

I'.
1

1
~ REFERENCE REACH - C4

1

n

1
~~
1
1

L.~

1
t
1
Stream Classification Form
Stream Channel Classification (Level Iq ...
Stream NAME: North Prong South Fork Mitchell River, Reach -Audrey Kraft (Above Restoration)
Basin NAME: Yadkin River Drainage AREA: 2304 acre 3.6 mil
Location:
Twp: Rge: Sec: Qtr: Lat: 0 Long: 0
Observers: Tommy Burchette, Jamie Tilley and Alan Walker Date: 3/15/2005

Bankfull WIDTH (Wb~ 35 Feet
WIDTH of the stream channel, at banldull stage elevation, in a riffie section.

Mean DEPTH (db~ 1.27 Feet
Mean ADEP~TTH `of the stream channel cross-section, at banldull stage elevation, in a rifle section.

Banldull Cross Section Area (Abp 84.34 Feetz
AREA of the stream channel cross-section, at banldull stage elevation, in a riffie section.

WIDTH /DEPTH RATIO (Wb~ /db~ 27.56 Ft/Ft
Banldull WIDTH divided by bankfull mean DEPTH, in a riffie section.

Maximum DEPTH (dam 2.3 Feet
Maximum depth of the bankfull channel cross-section, or elevation between the bankfull stage and
thalweg in a rifle section.

Flood-Prone Area WIDTH (W~ 206 Feet
The stage/elevation at which flood-prone area WIDTH is determined in a riffie section at twice
maximum DEPTH, or (2 x d~

Entrenchment RATIO (ER) 5.89 FUFt
The ratio of flood-prone area WIDTH divided by banldull channel WIDTH (W~/W~ in a riffie
section.

Channel Materials (Particle Size Index) D50 34.6 mm
The 50th percentile, or less than, from a pebble count frequency distribution of channel particles
representing the median or dominant particle size.

Water Surface SLOPE (S) 0.00'794 Ft/Ft
Average water surface slope as measured between the same position of bed features in the profile
over two meander wave lengths. This is similaz to average banldnll slope.

Channel SINUOSITY ~ 1.15
Sinuosity: an index of channel pattern, determined from stream length /valley length, i.e. (SL/VI.);

ratio of valley slope divided by channel slope (VS/ S).
or estimated from a

Stream Type
C 4 For ReferencEr, see page 5 5, 5 6:
Rosge~~, 1996. Applied PoverMorphology
© 2005 Wildland Hydrology

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Reference Reach Summary Data Form
... and Refen:nce Reach Summary Data
Mean Riffle Depth (dam 2.09; feet Mean Riffle Width (Wb~ _ 25.22; feet Mean Riffle Area (A~ €44.34 ; ft~ t

~ Mean Pool Depth (dam,) 2.53;feet Mean Pool Width (W~,) : 18.67;feet Mean Pool Area (Abp _ 4728;feetz
o - .-.z
-
~
~ Ratio Mean Pool ~d~/
Depth/Mean Rifle Depth ~ 1211 ~~~ Ratro Pool Width/Riffle 1 ; Wb~/
Width 0.740p W6~ Ratio Pool Area/
~ ~Ab~
Rifle Area ~ 1.066'Ab~

~ Maz Rifle Depth (dam 3.2; feet Max Pool Depth (dm~ 357; feet Max riffle depth/Mean riffle depth; 1.531
~ . , _,
`Maas pool depth/Mean riffle depth; 1.708 Point Baz Slope 0
V ., . " ,
Streamflow: Estimated Mean Velocity at Baukfull Singe (ub~; 4_SS;ft/s Estimation Method 1
.
Streamflow: ~stun;~tcxl Diuhazge at Bankfull Stage (Q~ 240~cfs 3-6;~z
Drainage Area

~- Ce,4gxet ,.Ave M_ in,; Max ~ n~iweosionless CcQmetrv Ratios Ave Min_ _ M~tx
~
~ 210 210~f~x:1
MeanderLength(Lm) ~ 210~ McanderLengthRatio(I,mIWhG~) ~ R327~ 8.327 8327"

~ Radius of Curvature (Rc) 105; 100; 110; feet Radius of CurvatureJRiffle Width (RclWy~ 4.163; 3.965; 4.362

a~ : Belt Width ~mr) 48; 48; 48;feet Meander Width Ratio (Wb~,/W~ 1.903; 1.903; 1.903
~ ,,-_ ..~~ ,,. w,
,_ Individual Pool Length 148.61; 38.551 58.671feet Pool Length/Riffle Width ; 1.9271 1.5291 2.326

Pool to Pool Spacing ~ 128.7 128.7 128.7~feet Pool to Pool Spacing/Riffle Width ~ 5.102 5.102 5.102 ?

~ ~
3 0.0104 ,ft/ft Av Water Surface Slo S 1 0.00794 lft/ft
Valle Slo Sinuosity (VS/S) 1 1.15
.
0 lfeet
Stream Length (SL) Valley Length (VL) 1 0 lfeet Sinuosity (SL/VL) 1 #####

Low Bank Height start 2.61 ~ feet
(LBO end' 2.93 ~ feet Max Riffle ~; 0; feet
Depth end' _ 0 feet Bank Height Ratio ~; #ki:##
(LBH/Max Riffle Depth) endr a
k'acet-Slo es" Ave Min Max I)ignensionlessSlo -Rati<~s Ave; Min •_Max
liiille Slope (S,;~ ~?.0239~?.0177~1.0302~f1/ft ILfitle SlopelAverage Water Surface Slolx; (S„r S) ~ 3.015 2224 3.805-

,~ - Run Slope (S~ ;0.0331 p.0214;0.0448; ft/ft Run S1opeJAverage Water Surface Slope (S„m/S) 4.168; 2.693; 5.641;

a ' Pool Slope (Sp) x.001310 0005 x.0021;ft/ft Pool SlopelAverage Water Surface Slope (Sr/S) ; 0159; 0 057; 0.259;.

Glide Sl~ipc (tip) Xt (H}38A.0026X1.OOSO~ft~ft Glick Slop~/4verage Water Surface tilope (SE1S) 1 0 47T 0 325; 06301
` U N'eature Mid int' Avc Min M~i~c Dimensionless Ilepth Ratios Ave Min Mak
Riffle Depth (dm,;r) 3200 ~ 3200 32~x~ ~ I ~t Kiffle Max Depth/Riffie Mean Depth (d~1d~ ~ 1.531 ~ L5311 1.531 ~;
~, ,.:..
Run Depth (dam 1 2.630; 2.230; 3.030;1 ~~t Run Max Depth/Riffle Mean Depth (dm„m/d~ ; 1.258; 1.067; 1.450;:.

Pool Depth (dm~ ; 3.570; 3.380; 3.750;1~'et Pool Max Depth/Riffle Mean Depth (d~/d~ ; 1.708; 1.617; 1 794;
,~ Pte. ~ . ~ , ,~ ..... s ~ .w,._.~. .. ,~.,., .
p dmF 1 2.6x0; I~ci Glide Max Depth/Riffie Mean Depth (dm~/d~ 1.134; 1.000; 1263;:-
Glide De th ( 1 ; 2.370: 2.090

Cati~ories Rt~hh Riffle` . Bar Lidice Kc~xhb Kittle` Bar
~, °-~o SilUCla}~ 0 0 0 Dl6 0.24 29.65 4-49 ~mm
~~ % Sand 37 2 11.02 ; 1_)35 1 45 20.99 ;mm
}.

~
- %Gravel 33 50 59.1 ; D50 34.6 6176 38.74 ;nun
-.
,,
~ %Cobble 30 48 29.88 ~ D84 96.71 112.45 832 ~mm
~ _ _ _
CJ 4. Boulder 0 0 0 D95 12129 148.8 98.19 lmm

%Bedtock 0 0 0 'D100 180 256 105 ,mm

a The range of "feature" mid-point maximum banldull depths, including the minimum, maximum and average values.
~`- (Pool depths are obtained from the deepest portior of the feature.)
b. A composite sample of materials from riffle and pool featutes taken within the designated reach.
c. Sample obtained within the "active" bed of a riffie feature at the location of the cross section.
©2005 Wldland Hydrology

C4 Reference Profile - N. Prong S. Fork Mitchell River

0
w
1
90 ~
0
v,~ ":I "I "?I ":I
~C • N ~I~CI ~~ ~I
of C/
~ I I I
I f I • ~ I
I I ~.,I ~I
$ ~ ~I al ~i ~I •
I ~~ ~I I ~I i
I I
I I I
I I I I
I I I I
~ I ~ I I
~ ~ I I I
~ I I ~ I I
~ I I I I ~
I I I I I ~
I I I I I I
50 100 1
Distance along stream (ft)
~ r i~ ~ ~ i ~ ~ . ~ ~ ~ ~ i r ~ ~ ~ ~

C4 Reference Profile -Long Hope Creek

O
N
n
90 ~
0
~r ~I +I ~I ~I
~ •..•..
XI ~ ~
XI X I
~ ~
XI
•
~ ~r ~~ • • • ~r• • ~I
~I I I •
~I .. • ~I
I I I
I I I t
;. . .
I I •
I I ~ I •
I
I I
I i
I
I I
I I
II
I I
I
I I
100
Distance along stream (ft)
~~I~I
~~~
Xxlxl . cH
a I~I
ICI
II I
III o ws
II I
II I
• ~ I I • BKF
• I I I•
~1 I
I I
• Pt
~I
I I O P2
II I
II I
III + P3
II I
II I
II I
I ~ I x P4

~ EXISTING CHANNEL - C4
~,

1
1

Stream Classification Form

ii

ii
Stream Channel Classification (Level 11) ...
Stream NAME: Snow Creek, Reach - C L White -Impacted
Basin NAME: Drainage AREA: 1280 acre 2 mil
Location:
Twp: Rge: Sec: Qtr: Lat: 36.3692 Long: 80.791
Observers: Date: 6/7/2006
Bankfull WIDTH (Wb~ 24.3 Feet
WIDTH of the stream channel, at bankfull stage elevation, in a riffle section.
Mean DEPTH (db~ i.i Feet
Mean DEPTH of the stream channel cross-section, at bankfull stage elevation, in a rifle section.
(dtx~An~e~

BankfuIl Goss Section Area (Abp 26.84 Feetz
AREA of the steam channel cross-section, at bankfull stage elevation, in a rifle section.

WIDTH /DEPTH RATIO manta /dbkf~ 22.09 FUFt
Bankfull WIDTH divided by bankfull mean DEPTH, in a riffie section.

Mazimnm DEPTH (dm~ 2.1 Feet
Maximum depth of the banldull channel cross-section, or elevation between the banld'ull stage and
thalweg in a riffle section.

Flood-Prone Area WIDTH (W~j 56.8 Feet
The stage/elevation at which flood-prone area WIDTH is determined in a riffie section at twice
maximum DEPTH, or (2 x d~
.. ,, :
.
,
Entrenchment RATIO (ER) 2.34 Ft/Ft
The ratio of flood-prone area WIDTH divided by banldull channel WIDTH (W~/Wb~ in a riffie
section.
_ ~ ..., ,
Channel Materials (Particle Size Indez) D50 45 mm
The 50th percentile, or less than, from a pebble count frequency distribution of channel particles
representing the median or dominant particle size.

Water Surface SLOPE (S) 0.00626 Ft/Ft
Average water surface slope as measured between the same position of bed features in the profile
over two meander wave lengths. This is similar to average bankfull slope.
Channel SINUOSITY (I~ 1.15
Sinuosity: an index of channel pattern, determined from stream length /valley length, i.e. (SL/VL);
or estimated from a ratio of valley slope divided by channel slope (VS/ S).
Stream Type C 4
- Fa ~~ ~ nese ~ ~=
Rosgen, lass. Appled Pover MophologY-
© 2005 Wildland Hydrology

1
1
1
Reference Reach Summary Data Form
... and Reference Reach Summary Data
Mean Rifle Depth (dye 1.46;feet Mean Riffle Width (Wb,~ 22.75;feet Mean Riffle Area (A~ 27.32;fee~
c
0
~y
C
N
~ Max Riffle Depth (dam 2;feet Max Pool Depth (dm~~ 2.45;feet
- -- - Max rifle depth/Mean rifIle
c .Max pool depth/Mean riffle depth; 1.678 Point Bar Slope
U - , ,,.
Streamflow: Estimated Mean Velocity at Bankfull Stage (u6~ ~ 3.65~f1/s
~_ Estimation Method
Streamflow: Estimated Discharge at Bankfull Stage (Qb~ ~ 98~cfs Drainage Area
Mean Pool Depth (db~,)
~. 1.53;feet Mean Pool Width (Wb~„) :23.8; feet Mean Pool Area (A~) 36.4; feetz
Ratio Mean Pool
~ 1048~~~ Ratro Pool Width/Riffle ~ I ~~Wb~,/
~ Ratio Pool Area/ I.3321Ab~
Depth/Mean Rtffle Depth ~ pdb~ Width ; W~ Riffle Area ;A~
0
a. The range of "feature" mid-point maximum bankfull depths, including the minimum, maximum and average values.
(Pool depths are obtained from the deepest portion of the feature.)
b. A composite sample of materials from riffle and pool featutes taken within the designated reach.
c. Sample obtained within the "active" bed of a riffle feature at the location of the cross section.
© 2005 Wildland Hydrology

1
A
1

1
1

ENTRAINMENT CALCULATION FORM
F _;.
Stream: ,~ ,~ J~~~ mw. . ` ~ 3 __ . , Reach: ._

,.
1 ~'
Team: ~ _~_. ,,,~_~~. y«~ ~ ~ Date: _ ,,~.
...., rh ..H[F,...
Information Input Area
D50 Riffle bed material D50 (mm)
D~50 Bar sample D5d (mm)
D; Largest particle from bar sample (mm) 0.33 (feet) soa.s mmifoot
Se Existing bankfull water surface slope (ft/ft)
de Existing bankfull mean depth (ft)
_~_ti R H drauiic Radius of Riffle Cross Section (ft)
1.65 yg Submerged specific weight of sediment

Calculation of Critical- Dimensionless Shear Stress
1.50 DsdD~so If value is between 3-7 Equation 1 will be used: T~a = 0.0834(D50/D"50)~~a'Z
2.87 D;/D50 If value is between 1.3-3.0 Equation 2 will be used: T~G = 0.0384(D f D50)~0'887
0.0151 T~G Critical Dimensionless Shear Stress Equation used: 2

Calculation of Bankf ull Mean Depth Required for Entrainment of Largest Particle in Bar Sample

1.36 d~ Required bankfull mean depth (ft) d~ = T.q SD;
Se
de/d~ Existing mean bankfull depth Stable
0.81 Re uired mean bankfull de th (d/d~ = 1)
Stable Vertical Stabili of Stream

Calculation of BKF Water Surface Slope Required for Entrainment of Largest Particle in Bar Sample

0.0074 S~ Required bankfull water surface slope (ft) S~ = T~G 5D'
de

0.81 Se/S~ Existing water surface slope
Re uired water surface sloe Stable
(S/S~ = 1)
Stable Vertical Stabili of Stream

Sediment Transport Validation
0.36 Bankfull Shear Stress T~ =yRS (Ib/ft2) y =Density of water = 62.4 Ibs/ft3

72 Moveable particle size (mm) at bankfull shear stress (predicted by the Shields Diagram: Blue field
book:p238, Red field book:p190

0.56 Predicted shear stress required to initate movement of D; (mm) (see Shields Diagram: Blue field
book: 238, Red field book: 190

1
1
1
1
1
1
1
1
1
1
1
Velocity computation fonn(Snow Creek (Existing 0+00 - 6+60)
Velocity Computation F+'orm

Generated: 9(18/2006 11:36 PM
Stream Name: SNOW CREEK (C. L. WHITE FARM)
Stream Location: SURRY COUNTY, NC
Station: 5+56
SLOPE FOR EXISTING STREAM REACH 0+00 - 6+60 = 0.009
Date: 8/1/2006
In ut Variables Ou ut Varia bles
Cross-section azea (Abp 25.6 ft Mean Depth (dh~ 1.05 ft
Width (Wb~) 24.3 ft Wetted Perimeter (WP) 26.41 ft
D84 Riffle 102 mm D84 0.33 ft
Slope (Shy 0.009 ft/ft Hydraulic Radius (R) 0.97 ft
Gravitational Acceleration () 32.2 ft/s2 R/D84 2.90 ft/ft
13/D84, u/u*, Mannin s n
U/U* = 5.7 ft/s/ft/S Using R/D84; Reference Reach Field Book, p.188; River Field Book, p.233
Mannin 'S n = 0.04 (Reference Reach Field Book, p.189; River Field Book, p.236)
Velocity = 3.5 ft/S From Manning's equation u~1.49R~S'rs~n
u/u*=2.83+5.710 84

Velocity = 2.9 ft/s n~*~z.s3+s.nng~R/nsa))
Jarrett's E uation for estimatin Mannin 's n
n = 0.1 n= 0.39So3sR~.~s
VelOClty = 2.I ft/S From Manning's equaUOn u=(1.49Rv3S"~)/n
Mannin 's n b Stream T e (for lar a rivers
Stream T e C/4
Mamun ~S ri = 0.031 Reference Reach Field Book, p.187; River Field Book, p.237
Velocity= 4.5 ft/S FromMaming'sequationu=(1.49Ru'S~o~n
Validate veloci calculations usin the Continui E nation
Drainage Area (mil) 2 Ga a Station ESW (Q) OUT
Discharge (Qb~ cfs 98 cfs
Velocity (u = Q/A ft/s 3.8 ft/s

Riffle 5+36
ELEV DEPTH AREA WET PER WIDTH HYD RAD MEAN D SLOPE ROUGH R/D84 VELOCITY UIU" U^2l2g DISCHARGE SHEAR POWER POWERNV FROUDE TRANSPORT
fin) fin) ESQ 6) eft) eft) eft) fib) ~~) X11 (fPs) lft) ~~g) (PSG (Ib/s) (Ib/iVs) (Ib/s)
1163.74 0.1 0.08 1.66 1.65 0.05 0.05 0.006 6.1289 0.16 0.11 1.14 0 0.01 0.02 0 0 0.09 0
1163.84 0.2 0.42 5.2 5.16 0.08 0.08 0.006 191.8152 0.26 0.03 0.2 0 0.01 0.03 0 0 0.02 0
1163.94 0.3 0.97 5.89 5.82 0.18 0.17 0.006 2.43896 0.51 0.32 1.81 0 0.31 0.06 0.12 0.02 0.14 0
1184.04 0.4 1.63 8.26 8.13 0.2 0.2 0.006 1.49358 0.64 0.45 2.31 0 0.74 0.07 0.28 0.03 0.18 0
1164.14 0.5 2.45 8.59 8.38 0.29 0.29 0.006 0.81937 0.93 0.74 3,12 0.01 1.81 0.11 0.68 0.08 0.24 0
1164,24 0.6 3.3 8.83 8.63 0.37 0.38 0.006 0.57507 1.19 1 3.73 0.02 3.28 0.14 1.23 0.14 0.29 0
1164.34 0.7 4.18 9.27 8.89 0.45 0.47 0.006 0.45049 1.44 1.24 4.21 0.02 5.19 0.17 1.94 0.22 0.32 0
1184.44 0.8 5.08 9.6 9.14 0,53 0.56 0.006 0.37507 1.7 1.48 4.62 0.03 7.51 0.2 2.81 0.31 0.35 0
1164,54 0,9 8.03 10.36 9.83 0.58 0.61 0,006 0.33914 1.86 1.63 4.66 0.04 9.8 0.22 3.67 0.37 0.37 0
1184.84 1 7.05 11,11 10.51 0.63 0.87 0.006 0.30759 2.02 1.78 5,1 0.05 12.b4 0.24 4.7 0.45 0.38 0
1184.74 1.1 8.13 11.87 11.2 0.89 0.73 0.006 0.28253 2.21 1.94 5.32 0.06 15.8 0.26 5.91 0.53 0.4 0
1164.84 1,2 9.4 14.89 14.2 0,83 0.66 0.006 0.29395 2.02 1,62 5.22 0.05 17.11 0,24 6,41 0.45 0.39 0
1184.94 1,3 10.87 15.92 15.2 0.88 0,72 0.008 0.27149 2,18 1.97 5.43 0,06 21.39 0.25 8.01 0.53 0,41 0
1185,04 1,4 12.44 18,95 16.2 0.73 0,77 0.008 0.25499 2.34 2.1 5,8 0.07 28.17 0.27 9.8 0.6 0.42 0
1165.14 1,5 14.11 17.9 17,1 0.79 0.83 0.006 0.23918 2.53 2.26 5.78 0,08 31.88 0.3 11.94 0.7 0.44 0
1185.24 1,8 15.88 19,1 18,25 0,83 0.87 0.006 0.22868 2.88 2.37 5.91 0.09 37.81 0.31 14.p8 0.77 0.4b 0
1185,34 1.7 17,78 20.29 19.4 0.88 0.92 0.006 0,218 2.82 2,b 8,06 0.1 44.38 0,33 16,61 0.86 0.46 0
1165.44 1.8 19.91 22,84 21.9 0.87 0.91 0.006 0.21614 2,79 2.49 6.08 0.1 49,68 0.33 18.59 0.85 0.46 0
1185.54 1.9 22.14 23.69 22.7 0.93 0.98 0.008 0.20461 2.98 2.66 8.25 0.11 58.88 0.35 21.97 0.97 0.47 0
1166,84 2.2 29.53 28.52 27,41 1.04 1.08 0.008 0,18739 3.34 2.93 6.53 0.13 86.49 0,39 32,38 1,18 0.5 0
1165.94 2.3 32.32 29.48 28.32 1.1 1.14 0.006 0.1803 3.53 3.07 6.66 0.15 99.25 0.41 37.16 1.31 0.51 0
1166.04 2.4 35.24 31.27 30.11 1.13 1,17 0.006 0.17616 3.83 3.15 6.74 0.15 110.96 0.42 41.54 1.38 0.51 0
1186.14 2.5 38.34 33.08 31.9 1.16 1.2 0.006 0.17229 3.72 3.23 8.81 0,16 123.88 0,43 46.31 1.45 0.52 0
1186.24 2,6 41.62 34,89 33,69 1.19 1.24 0.006 0,18798 3.82 3,31 6,9 0,17 137.72 0.45 51.56 1,53 0,52 0
1188.34 2.7 45.07 36.53 35.22 1.23 1.28 0.006 0.16387 3.95 3.41 8.98 0.18 153.48 0.4B 57.46 1.63 0.53 0
1186.44 2,8 48,67 38.18 36.76 1.28 1.32 0.006 0.16023 4.11 3.51 7.07 0.19 171,02 0,48 64.03 1.74 0.64 0
1188.54 2.9 52.42 39.79 38.3 1.32 1.37 0.006 0.15618 4.23 3,61 7.16 0.2 189.46 0,49 70.93 1.85 0.54 0
1168.8d 3 58.32 41,43 39.83 1.38 1.41 0.006 0.1b292 4.36 3,71 7.23 0.21 208,81 0,51 78.18 1,98 0.55 0
1186.74 3.1 60.38 43.06 41,37 1.4 1.46 0.008 0.14938 4.49 3.81 7.32 0.22 229.8 0.52 86.04 2.08 0.68 0
1186.84 3,2 64.8 44.69 42.9 1.45 1.51 0.006 0.14607 4.85 3.92 7.4 0,24 253.04 0,54 94.74 2.21 0.56 0
1166.94 3.3 68.97 46.32 44,44 1.49 1.55 0.006 0.14339 4.78 4.01 7.47 0.25 276.4 0.56 103.49 2.33 0.57 0
1167.04 3.4 73.49 47.96 45.98 1.93 1.6 0.006 0.14045 4.91 4.1 7.55 0.26 301.55 0.57 112.9 2.48 0.57 0.38
1187.14 3.5 78.18 49.59 47.51 1.58 1.65 0.008 0,13769 5.07 4.21 7.82 0.28 329.16 0.59 123.24 2.59 0.58 1.95
1167,24 3,6 62.99 51.22 49.05 1.82 1.69 0.006 0.13544 5.2 4.3 7.69 0.29 356.83 0.81 133.8 2.72 0.58 3.81
1187.34 3.7 87.97 52,86 50,58 1.66 1.74 0.006 0.13296 5.33 4.39 7.76 0.3 386.44 0,62 144,68 2.86 0.59 6.69
1167.44 3.8 83.1 54,49 52.12 1.71 1.79 0.006 0,13062 5.49 4.5 7.83 0.31 418.79 0.84 156.79 3.01 0.59 10,19
1187.54 3.9 98.39 56.12 53.65 1.75 1.83 0.006 0.1287 b.61 4.58 7.88 0.33 4b1.05 0.66 168.87 3.16 0.6 13.57
1167.64 4 103.84 57,75 Sb,19 1.8 1.88 0.008 0.12657 5.77 4.89 7.95 0.34 486.84 0.87 182.27 3.3 0.8 18.2
1167.74 4.1 109.4 58.66 56 1.86 1.95 0.006 0,124 5.97 4.81 8.03 0,36 526.78 0.7 197.22 3.52 0.61 24.81
1187.84 4,2 115.04 58.57 56.8 1.93 2.03 0.006 0.12134 6.19 4.96 8.12 0.38 570.38 0.72 213,56 3,76 0.61 33.2
1187.94 4,3 120.78 60.47 57.61 2 2.1 0.006 0.11909 6.42 5.09 8.2 0.4 615.25 0.75 230.35 4 0.82 41.42
1168.04 4,4 126.56 61.38 58.42 2.06 2.17 0,008 0.11696 6.61 5.22 6.27 0.42 660.33 0,77 247.23 4.23 0.62 50,38
1168,14 4,5 132.44 62,29 59.22 2.13 x.24 0.006 0.11496 8.83 5.35 8.34 0.44 708.74 0.8 285.35 4.48 0,63 60.01
1168.24 4.6 138.36 62,49 59.23 2,21 2.34 0.008 0.11246 7.09 5.51 8.43 0.47 782.53 0.83 285,49 4.82 0.63 73.14
1168.34 4.7 144.28 62.69 59.24 2.3 2.44 0.006 0.11014 7.38 5.68 8.52 0.5 819.68 0.88 306.89 5.18 0.64 87.02
1188.44 4.8 150.21 62.89 59.24 2.39 2.54 0.006 0.10797 7.87 5.85 8.61 0.63 878.61 0.89 328.95 5.55 0.85 101.57
1168.54 4.9 156.13 63.09 59.25 2.47 2.64 0.006 0.10594 7.92 6 8.68 0.56 937.25 0.92 350.9 5.92 0.65 116.78
1168.64 5 162.06 63.29 59.25 2.56 2.73 0.006 0.10418 8.21 6.16 8.78 0.59 998.74 0.96 373.93 6.31 0.66 130.95
1168.74 5.1 167.98 63.49 59.26 2.65 2.83 0.006 0.10237 8.5 6.33 8.84 0.62 1082.53 0.99 397.81 6.71 0.66 147.28
1168.84 5.2 173.91 63.69 59.27 2.73 2.93 0.006 0.10066 8.76 6.47 8.91 0,65 1125.97 1.02 421.56 7.11 0.67 164.09
1168.94 5.3 179.84 63.89 59.27 2.81 3.03 0.006 0.09905 9.02 6.62 8.99 0.68 1190.86 1.05 445.86 7.52 0.67 181.37
1169.04 5.4 185.77 64.09 59.28 2.9 3.13 0.006 0.09752 9.3 6.78 9.06 0.71 1259.44 1.09 471.53 7.95 0.68 199.16
1169.14 5.5 191.69 64.29 59.29 2.98 3.23 0.006 0.09607 9.56 6.92 9.13 0.74 1327.28 1.12 496.93 8.38 0.68 217.38
1169.24 5.6 197.62 64.49 59.29 3.06 3.33 0.006 0.09469 9.82 7.07 9.19 0.78 1396.65 1.15 522.91 8.62 0.68 235.96

t

DESIGN E4

MORPHOLOGICAL CHARACTERISTICS OF THE EXISTING AND PROPOSED
CHANNEL WITH REFERENCE REACH DATA
(After Rosgen, 1996)
Restoration Site Name of stream ~ location : Snow Creek Sur Coun
( ) rY tY
Reference Reach (Name of stream 8~ location): Trib. To Meadow Fork Creek, Allegheny County

VARIABLES EXISTING PROPOSED REFERENCE
CHANNEL REACH REACH
1. Stream type F4 E4 E4
2. Drainage area 2 2 1.3
s . mi.
3. Bankfull width Mean: 22.8 Mean: 15 Mean: 10.9
(wb~r) - ft.
Range: Range: Range: 10.3 -11.6
4. Bankfull mean Mean: 1.46 Mean: 2.0 Mean: 1.33
depth (db,~) - ft.
Range: Range: Range: 1.2 -1.45
5. Width/depth Mean: 15.6 Mean: 7.5 Mean: 8.2
ratio (wbk~/d~)
Range: Range: Range: 7.1 - 9.7
6. Bankfull cross- Mean: 33.1 Mean: 30 Mean: 14.3
sectional area Range:
Abp - s . ft. Range: Range: 13.6 -15
7. Bankfull mean Mean: 3.65 Mean: 3.3 Mean: 4.3
velocity (vb~) - f/s
Range: Ran e: Ran e:
8. Bankfull discharge, g$ g$ 64
cfs Qe~
9. Bankfull Mean: 2.0 Mean: 2.8 Mean: 1.7
Maximum depth
dm~ _ ft Range: Range: 2.6 - 3.0 Range: 1.5 -1.9
10. Max d~ff/db,~ ratio Mean: 1.4 Mean: 1.4 Mean: 1.3
Ran e: Ran e: 1.3 -1.5 Ran e: 1.25 -1.32
11. RifFle Length (L,;ff) Mean: 26 Mean: 27 Mean: 20
_ ft, Range: 7.9 - 44 Range: 7.5 - 63 Range: 5 - 46
12. Ratio riffle length Mean: 1.1 Mean: 1.8 Mean: 1.8
to bkf width Range: 0.3 -1.9 Range: 0.5 - 4.2 Range: 0.5 - 4.2
L~~ /wb,~
13. Low bank height Mean: 1.1 Mean: 1.0 Mean: 1.0
to max. d~ ratio Range: Range: Range:
14. Width of Mean: 27.3 Mean: 208 Mean: 151
flood prone area
wf a _ ft. Range: Range: 75 - 420 Range: 81 - 292
15. Entrenchment Mean:1.2 Mean: 13.9 Mean: 13.9
ratio (w~,a/wb~) Range: Range: 5 - 28.3 Range: 7 - 28.3
Page 1 of 5 09/18/06

I~

ii

0
1

VARIABLES EXISTING PROPOSED REFERENCE
CHANNEL REACH REACH
16. Meander length Mean: 156 Mean: 121.5 Mean: 88
(gym) _ ft. Range:89 -224 Range: 75 -184.5 Range: 54 -134
17. Ratio of Mean: 6.7 Mean: 8.1 Mean: 8.1
meander length
to bankfull Range: 3.9 - 9.7 Range: 5 -12.3 Range: 5 -12.3
width L,,,/wb~
18. Radius of Mean: 38 Mean: 42 Mean: 23.5
curvature (R~) -
ft. Range: 14.7 - 61.3 Range: 30 - 53 Range: 12.3 - 38
19. Ratio of radius Mean: 1.65 Mean: 2.7 Mean: 2.2
of curvature to
kfull width
b
an Range: 0.6 - 2.7 Range: 2 - 3.5 Range: 1.2 - 3.5
o
'
~d wbkf
20. Belt width (w~ Mean: 49 Mean: 67.5 Mean: 49
- ft.
Range: 39 - 60 Range: 43.5 - 94.5 Range: 32 - 69
21. Meander width Mean: 2.1 Mean: 4.5 Mean: 4.5
ratio (wbn/wb~)
Range: 1.7 - 2.6 Range: 2.9 - 6.3 Range: 2.9 - 6.3
22. Sinuosity = k 1.15 1.3 (min) 1.5
(Stream Lengthtnan~/
vane distance
23. Valley slope 0.003 0.0069 0.0127
ft/ft
24. Average water 0.006 0.004 0.008
surface slope-ft/ft
Sav = Svalle IC
25. Pool slope Mean: 0.0006 Mean: 0.0009 Mean: 0.0014
(sue,) - ft/ft
Range: 0.0001 - 0.0011 Ran e: 0.0006 - 0.0012 Ran e:0.0002 - 0.0026
26. Ratio of pool Mean: 0.2 Mean: 0.12 Mean: 0.12
slope to
average slope Range: 0.03 - 0.4 Range: 0.021 - 0.23 Range: 0.021 - 0.23
S Sb~
27. Maximum Mean: 2.1 Mean: 3.5 Mean: 2.55
pool depth
d maX I _ ft Range: 2.0 - 2.3 Range: 2.5 - 4.2 Range: 2.0 - 3.2
28. Ratio of pool Mean: 1.44 Mean: 2.2 Mean: 2.2
depth to
average Range: 1.37 -1.6 Range: 1.7 - 2.8 Range: 1.7 - 2.8
bankfull depth
dmax dbKf
29. Pool width Mean: 23.8 Mean: 22 Mean: 17.9
yy I _ ft. Range: Range: 18 - 23 Range:
30. Ratio of pool Mean: 1.0 Mean: 1.1 Mean: 1.1
width to
bankfull width Range: Range: 0.9 -1.15 Range: 0.9 -1.15
w ol/wbl~
31. Pool Area - sq ft Mean: 36.4 Mean: 37.5 Mean: 17.8
A I Range: Range: 36 - 39 Range: 17.3 -18.2
' Page 2 of 5 09/18/06

L

VARIABLES EXISTING PROPOSED REFERENCE
CHANNEL REACH REACH
32. Ratio of Pool Mean: 1.1 Mean: 1.25 Mean: 1.25
Area to Bankfull
Area A ;/Abp Range: Range: 1.2 -1.3 Range: 1.2 - 1.3
33. Pool to pool Mean: 75 Mean: 61.5 Mean: 45
spacing (p-p) -
ft Range: 31 - 132 Range: 33 -102 Range: 24 - 74
34. Ratio of p-p Mean: 3.3 Mean: 4.1 Mean: 4.1
spacing to
bankfull width Range: 1.3 - 5.7 Range: 2.2 - 6.8 Range: 2.2 - 6.8
- /Wbkf
35. Pool length (L~o;) Mean: 33 Mean: 22 Mean: 17.4
_ ft. Range: 14 - 48 Range: 10 - 40 Range: 7.7 - 32.6
36. Ratio of Pool Mean: 1.4 Mean: 1.1 Mean: 1.1
length to
bankfull width Range: 0.6 - 2.1 Range: 0.5 - 2.0 Range: 0.5 - 2.0
I- I/Wbkf
37. Avg. riffle slope Mean: 0.011 Mean: 0.012 Mean: 0.0126
s,;~ - ft./ft. Range: 0.0021 - 0.022 Range: 0.005 - 0.013 Range: 0.006 - 0.017
38. Ratio of riffle Mean: 3.6 Mean: 2.0 Mean: 1.35
slope to avg.
slo a (s~/sa„ Range: 0.7 - 7.3 Range: 1.3 - 2.2 Range: 0.63 -1.8
39. Avg. run slope Mean: 0.0067 Mean: 0.0096 Mean: 0.0146
ft/ft Range: 0.0035 - 0.0097 Range: 0.004 - 0.013 Range: 0.005 - 0.022
40. Ratio of run Mean: 2.2 Mean: 1.6 Mean: 1.6
slope to avg
slo a sN~/sa„ Range: 1.2 - 3.3 Range: 1.4 - 2.2 Range: 0.6 - 2.4
41. Avg. glide slope Mean: 0.0048 Mean: 0.0012 Mean: 0.0054
ft/ft Range: 0.002 - 0.009 Range: 0.0009 - 0.0018 Range: 0.001 - 0.0158
42. Ratio of glide Mean: 1.6 Mean: 0.2 Mean: 0.58
slope to avg
sloes ;;de/s81) Range: 0.6 - 3.0 Range: 0.15 - 0.3 Range: 0.12 -1.68
43. Max run depth Mean: 2.4 Mean: 3.2 Mean: 2.1
dmax ~~ _ ft. Range: 2.1 - 2.6 Range: 3 - 3.6 Range: 1.7 - 2.5
44. Ratio of max. run Mean: 1.6 Mean: 1.6 Mean: 1.6
depth to mean bkf
de th dmax run/dbkf Range: 1.4 - 1.7 Range: 1.5 -1.8 Range: 1.5 -1.8
45. Run width (w~„~) Mean: Mean: 13.5 Mean: 10
ft. Range: Range: 13.2 -14.3 Range: 9.6 -10.4
46. Run width to Mean: Mean: 0.9 Mean: 0.9
bankfull width Range: Range: 0.88 - 0.95 Range: 0.88 - 0.95
ratio w~,~bkf
47. Mean run depth Mean: Mean: 2.04 Mean: 1.38
d~,~ ft. Range: Range: 1.7 - 2.2 Range: 1.2 -1.5
48. Run w/d ratio Mean: Mean.: 6.6 Mean: 7.24
yy~u~/dN~ Range: Range: 6 - 8.3 Range: 6.4 - 8.7
49. Ratio of run w/d Mean: Mean: 0.88 Mean: 0.88
to riffle w/d Range: Range: 0.8 -1.1 Range: 0.8 -1.1
50. Run length (L~,~) Mean: 19 Mean: 12 Mean:8.4
ft, Range: 4.3 - 43 Range: 7.5 -19.5 Range: 5.0 - 13.8
' Page 3 of 5 09/18/06

VARIABLES EXISTING PROPOSED REFERENCE
CHANNEL REACH REACH
51. Ratio of run Mean: 0.8 Mean: 0.8 Mean: 0.8
length to bankfull Range: 0.2 -1.9 Range: 0.5 - 1.3 Range: 0.5 -1.3
width L~,~/wb,~
52. Max. glide depth Mean: 2.0 Mean: 2.8 Mean: 1.8
dmax lids _ ft_ Range: 1.6 - 2.3 Range: 2.5 - 3.1 Range: 1.7 - 2.1
53. Ratio of max. Mean: 1.33 Mean: 1.4 Mean: 1.4
glide depth to
mean bkf
depth Range: 1.1 -1.5 Range: 1.25 -1.55 Range: 1.25 -1.55
/
dmax lide/dbkf
54. Glide width Mean: Mean: 13.5 Mean: 9.7
~/ iide _ ft. Range: Range: 12.8 -13.7 Range: 9.3 -10
55. Ratio of glide Mean: Mean: 0.9 Mean: 0.89
width to ban
kfull Range: Range: 0.85 - 0.91 Range: 0.85 - 0.91
//
width W lide~wbkf
56. Glide mean Mean: Mean: 2.14 Mean: 1.4
de th d ,;de - ft. Range: Range: 1.7 - 2.4 Range: 1.1 -1.6
57. Glide w/d ratio Mean: Mean: 6.3 Mean: 6.9
w lide/d tide Range: Range: 5.3 - 8.3 Range: 5.8 - 9.1
58. Ratio of glide w/d Mean: Mean: 0.84 Mean: 0.84
to riffle w/d Range: Range: 0.7 -1.1 Range: 0.7 -1.1
59. Glide length Mean: 10.3 Mean: 10.5 Mean: 7.2
L ride - ft• Range: 8.5 -12.2 Range: 7.5 -13.5 Range: 5.8 -10.2
60. Ratio of glide Mean: 0.45 Mean: 0.7 Mean: 0.7
length to bankfull
width lide/wbkf Range: 0.37 - 0.53 Range: 0.5 - 0.9 Range: 0.5 - 0.9
MATERIALS:
1. Particle Size
Distribution of
Channel Material
mm
D 16 0.8 4.4
D 35 10.2 12.1
D 50 23.5 16
D 84 102.7 35.9
D 95 180 64
' Remarks: The values calculated and shown on these pages are for the E4 section
beginning at station 5+50 and continuing to station 20+50.
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' Page 4 of 5 09/18/06

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1

VARIABLES EXISTING PROPOSED REFERENCE
CHANNEL REACH REACH
MATERIALS:
2. Particle Size
Distribution of
Riffle Bed
Material mm
D is 13 13 16
D as 22.6 22.6 24.4
D so 34.8 34.8 31.1
D ~ 95.4 95.4 55.6
D 95 205.3 205.3 79.6
3. Particle Size
Distribution of
Bar Material mm EXISTING
CHANNEL PROPOSED
REACH REFERENCE
REACH
D 16 7.6 7.6 2.07
D as 20.3 20.3 6.2
D 50 31.9 31.9 11.34
D ~ 83.5 83.5 34.4
D 95 101.7 101.7 59.1
Largest size particle
at the toe (lower third)
of bar mm 110 110 70
SEDIMENT TRANSPORT VALIDATION
(BASED ON BANKFULL SHEAR STRESS)
Existin Condition
Pro osed Condition
Bankfull shear stress -Calculated value (Ib/ft) 0.46 0.44
Critical shear stress -Value from Shields Diagram(Ib/ )
OR Grain Diameter from Shields Diagram (mm)
Relation ad"usted to include field data 88mm 85mm
Critical dimensionless shear stress 0.015 0.015
Minimum mean db~ calculated using critical
dimensionless shear stress a uations 1.36 1.4
Manning's "n" 0.04 0.038
These values and ratios were calculated and proposed by:
Name: Alan Walker
Stream Walker Consulti~ng Date: Auaust, 2006
' Page 5 of 5 09/18/06

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::.
Rf
N
W
Horizontal Distance (ft)
r ^~ J~ l~ lll~ lllll~ llll~ l~ ~ ~ l~ l~ lll~ llll~ ~ ~^^ ~r~.' illy ~
Planned E4 (5+50 - 20+50)
O Ground Points • Bankfull Indicators • Water Surtace Points
Wbkf 15 Dbkf 2 Abkf 30

r

A
1

r

r
ENTRAINMENT CALCULATION FORM
Stream: ~. ~~ ~° ,~,~ Reach:
Team: ~t ._ a -Date: ,.
..
Information Input Area
Dso Riffle bed material D50 (mm)
~' ~ D"SO Bar sample D50 (mm)
~ D; Largest particle from bar sample (mm) 0.33 (feet) sows mmifoot
_
~~ ~ Se Existing bankfull water surtace slope (ft/ft)
r de Existing bankfull mean depth (ft)
R H draulic Radius of Riffle Cross Section ft
1.65 ys Submerged specific weight of sediment

Calculation of Critical Dimensionless Shear Stress
1.50 Dso/D"50 If value is between 3-7 Equation 1 will be used: T*p = 0.0834(DSO/D"~)~0~872
2.87 D;/D50 If value is between 1.3-3.0 Equation 2 will be used: Tfa = 0.0384(D;/D50)"o.ae~
0.0151 TfG Critical Dimensionless Shear Stress Equation used: 2

Calculation of Bankf ull Mean Depth Required for Entrainment of Largest Particle in Bar Sample

2.04 d~ Required bankfull mean depth (ft) d~ = T.G SD'
Se

2.00 de Existing bankfull mean depth (ft)

Calculati on of BKF Water Surtace Slope Required for Entrainment of Largest Particle in Bar Sample

0.0041 S~ Required bankfull water surface slope (ft) S~ - T+~;ySD;
de

0.0040 Se Existing bankfull water surface slope (ft)

Sediment Transport Validation
0.44 Bankfull Shear Stress T~ =yRS (Ib/ft2) y =Specific Weight of water = 62.4 Ibs/ft3

85 Moveable particle size (mm) at bankfull shear stress (predicted by the Revised Shields Diagram by
Ros en, 2006

0.56 Predicted shear stress required to initiate movement of D; (mm) (see Revised Shields Diagram,
Ros en, 2006
Note: If available bankfull shear stress exceeds Q~oo of bed, degradation potential exists.

1
1
1
1
1
1
1
1
1
1
1
1
1
Velocity computation form(Snow Creek (5+50 - 20+SO)
Velocity Computation. Form.

~ .~ ..

t

-
- f. - ...
Generated: 9/19/2006 2:07 PM
Stream Name: SNOW CREEK (C. L. WHITE FARM
Stream Location: SURRY COUNTY, NC
Station: S+SO - 20+SO E/4 STEAM TYPE
SLOPE FOR STREAM REACH = 0.4%
Date: 8/ 1 /2006
In ut Variab les Ou ut Varia bles
Cross-section area (Abp 30 ft Mean Depth (dh~ 2.00 ft
Width (Wb~ 15 ft Wetted Perimeter (WP) 16.90 ft
D84 (Riffle 95 mm D84 0.31 ft
Slope (Shy 0.004 ft/ft Hydraulic Radius (R) 1.75 ft
Gravitational Acceleration () 32.2 ft/s2 R/D84 3.61 ft/ft
R/D84, u/u*, Mannin s n
U/U* = 7.5 ft/S/ft/S Using R/D84; Reference Reach Field Book, p.188; River Field Book, p.233
Mannin ~S n = 0.038 (Reference Reach Field Book, p.189; River Field Book, p.236)
Veloci = 3.6 ft1S From Manning's equation u~1.49R~S12~n
83+5.710 (R/D84)
2
.
u/u*=
ll* - O.S ~y~
ft/S ,,
p
~
uw~gRS~03
Velocity = 3.4 ft/S n=u*(2.s3+s.71°g(R/DSa~~
Jarrett's E uation for estimatin Mannin 's n
n = 0.0
n= 0.39SoasR.o.~e
Veloci = 3.1 ft/S From Manning's equation u=(1.49R~S12yn
Mannin 's n b Stream T e (for lar a rivers
Stream T e E/4
Mamun ~S n = 0.03:1 Reference Reach Field Book, p.187; River Field Book, p.237
Velocity = 4.4 ft/S From Manning's equation u~1.49R~S12yn
Validate velocit calculations usin the Continui E uation
Draina a Area (mil) 2 Ga a Station
Discharge (Qh~ cfs 98 cfs
Veloci (u = Q/A) ft/s 3.3 ftls

1
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1
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C. L. WHITE PROPERTY, SURRY COUNTY, NC
SNOW CREEK E4 STREAM TYPE sta. 5+50 - 21+00
Bankfult Shear Stress Calculation:
Hydraulic Radius (ft) 1.75
Slope (ft/ft) 0.004
T = (Ibs/ftz) 0.44
y = 0.5656Ln(x) + 2.98
Min. Rock Size = (ft) 2.512
Min. Rock Vol. (ft3) 15.842
Min. Rock Weight 1742.630
(assume 1101bs/ft3)

E4 Riffle 5+50-20+50
ELEV DEPTH AREA WET PER WIDTH HYD RAD MEAN 0 SLOPE ROUGH RlD84 VELOCITY U/U" U^2/2g DISCHARGE SHEAR POWER POWER/W FROUDE TRANSPORT
(ft) (ft) (sq ft) (ft) (ft) (ft) (ft) (ft/ft) [U/U"] (fps) (ft) (cfs) (psf) (Ib/s) (Ib/fUs) (Ib/s)
96.63 0.1 0.32 5.37 5.36 0.06 0.06 0.004 0.031 0.19 0 0 0 0 0.01 0 0 0 0
96.73 0.2 0.94 6.5 6.47 0.14 0.14 0.004 0.031 0.45 0.12 0.86 0 D.11 0.03 0.03 0 0.05 0
96.83 0.3 1.61 7.15 7.09 0.23 0.23 0,004 0.031 0.74 0.36 2.08 0 0.58 0.06 0.14 0.02 0.13 0
96.93 0.4 2.36 7.97 7.88 0.3 0.3 0.004 0.031 0.98 0.54 2.74 0 1.27 0.07 0.32 0.04 0.17 0
97.03 0.5 3.2 8,94 8.81 0.36 0.36 0.004 0.031 1.15 0.69 3.18 0.01 2.19 0.08 0.55 0.06 0.2 0
97.13 0.6 4.1 9.36 9.14 0.44 0.45 0.004 0.031 1.41 0.88 3.68 0.01 3.59 0.11 0.9 0.1 0.23 0
97.23 0.7 5.02 9.67 9.36 0.52 0.54 0.004 0.031 1.67 1.06 4.09 0.02 5.31 0.13 1.33 0.14 0.25 0
87.33 0.8 5.87 9.95 9.55 0.6 0.63 0.004 0.031 1.92 1.23 4.44 0.02 7.37 0.15 1.64 0.19 0.27 0
97.43 0.9 6.93 10.23 9.74 0.68 0.71 0.004 0.031 2.18 1.41 4.75 0.03 9.74 0.17 2.43 0.25 0.29 0
97.53 1 7.92 10.58 10.02 0.75 0.79 0.004 0.031 2.41 1.55 4.99 0.04 12.28 0.19 3.06 0.31 0.31 0
97.63 1.1 8.94 10.94 10.32 0.82 0.87 0.004 0.031 2.63 1.69 5.21 0.04 15.13 0.2 3.78 0.37 0.32 0
97.73 1.2 9.98 11.25 10.54 0.89 0.95 0.004 0.031 2.86 1.83 5.41 0.05 18.28 0.22 4.56 0.43 0.33 0
97.83 1.3 11.04 11.49 10.63 0.96 1.04 0,004 0.031 3.08 1.97 5.6 0.08 21.72 0.24 5.42 0.51 0.34 0
97.93 1.4 12.11 11.72 10.72 1.03 1.13 0.004 0.031 3.3 2.1 5.77 0.07 25.44 0.28 6.35 0.59 0.35 0
98.03 1.5 13.19 12.03 10.95 1.1 1.2 0.004 0.031 3.53 2.23 5.93 0.08 29.44 0.27 7.35 0.67 '0.38 0
98.13 1.6 14.3 12.37 11.21 1.16 1.28 0.004 0.031 3.72 2.34 6.06 0.09 33.5 0.29 8.38 0.75 0.38 0
98.23 1.7 15.43 12.68 11.44 1.22 1.35 0.004 0.031 3.91 2.45 6.18 0.09 37.83 0.3 9,44 083 0.37 0
98.33 1.8 16.58 12.94 11.61 1.28 1.43 0.004 0.031 4.11 2.58 6.3 0.1 42.43 0.32 10.59 0.91 0.38 0
98.43 1.9 17.75 13.2 11.78 1.34 1.51 0.004 0.031 4.3 2.67 6.41 0.11 47.3 0.33 11.81 1 0.38 0
98.53 2 18.94 13.48 11.88 1.4 1.58 0.004 0.031 4.49 2.77 8.52 0.12 52.48 0.35 13.09 1.09 0.38 0.05
98.63 2.1 20.15 13.8 12.22 1.46 1.65 0.004 0.031 4.68 2.87 8.83 0.13 57.9 0.38 14.45 1.18 0.39 0.15
98.73 2.2 21,39 14.18 12.51 1.51 1.71 0.004 0.031 4.84 2.96 6.71 0.14 63.28 0.38 15.8 1.26 0.4 0.26
98.83 2.3 22.66 14.6 12.91 1.55 1.76 0.004 0.031 4.97 3.03 6.77 0,14 88.57 0.39 17.12 1.33 0.4 0.37
98.93 2.4 23.87 15.06 13.32 1.59 1.8 0.004 0.031 5.1 3.09 6.84 0.15 74.15 0.4 18.51 1.39 0.41 0.51
99.03 2.5 25.32 15.51 13.73 1.63 1.84 0.004 0.031 5.23 3.16 6.9 0.18 80.01 0.41 19,97 1.45 0.41 0.88
99.13 2.8 26.71 15.87 14 1.68 1.91 0.004 0.031 5.39 3.24 6.97 0.16 86.81 0.42 21.82 1.54 0.41 0.86
99.23 2.7 28.12 16.25 14.3 1.73 1.97 0.004 0.031 5.55 3.32 7.04 0.17 93.49 0.43 23.33 1.63 0.42 1.09
99.33 2.8 29.58 18.88 14.87 1.75 1.98 0.004 0.031 5.61 3.36 7.07 0.18 99.3 0.44 24.79 1.87 0.42 1.23
99.43 2.9 31.41 24.4 22.36 1.29 1.4 0.004 0.031 4.14 2.58 6.32 0.1 80.93 0,32 20.2 0.9 0.38 1.23
99.53 3 33.76 26.86 24.81 1.28 1.36 0.004 0.031 4.04 2.52 6.26 0.1 85.24 0.31 21.28 0.86 0.38 1.23
99.63 3.1 36.36 28.89 26.83 1.26 1.35 0.004 0.031 4.04 2.52 6.26 0.1 91.75 0.31 22.9 0.85 0.38 1.23
99.73 3.2 39.11 30.31 28.24 1.29 1.38 0.004 0.031 4.14 2.58 6.32 0.1 100.78 0.32 25.15 0.89 0.39 0.01
89.83 3.3 42 31.4 29.28 1.34 1.43 0.004 0.031 4.3 2.67 6.41 0.11 111.93 0.33 27.94 0.95 0.39 0.13

~ REFERENCE REACH - E4

1

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A

Stream Classification Form
Stream Channel Classification (Level II) ...
Stream NAME: UT, .l`EADOT~T FORK , CREEK=REACH 2
Basin NAME: New River Drainage AREA: 832 acre 1.3 mil
Location: Alleghany County, NC
Twp: Rge: Sec: Qtr: Lat: 36.4006 Long: 81.206
Observers: Team 2 (Leve12 - 2006) Date: 3/22/2006

Bankfull WIDTH (Wb~) 10.31 Feet
- WIDTH of the stream channel, at bankfull stage elevation, in a riffle section.

Mean DEPTH (db~ 1.45 Feet
of the stream channel cross-section, at banldull stage elevation, in a riffle section.
Mean
DE
P
T
H
~
/
~x
7
`
(dbl~~ ~bkfl ~` bkfl

Bankfull Cross Section Area (Abp 14.98 Feet`
- AREA of the stream channel cross-section, at banldull stage elevation, in a riffle section.

WIDTH /DEPTH RATIO /W /d 7.11 Ft/Ft
l'• bkf bId)
Banldull WIDTH divided by bankfull mean DEPTH, in a riffle section.
:.
Mazimum DEPTH (dm~ 1.92 Feet
Maximum depth of the banldull channel cross-section, or elevation between the bankfull stage and
thalweg in a riffie section.

Flood-Prone Area WIDTH (W~ 292 Feet
The stage/elevation at which flood-prone area WIDTH is determined in a riffle section at twice
maximum DEPTH, or (2 x dm,;~

-~ Entrenchment RATIO (ER) 28.32 FUFt
a `. The ratio of flood-prone area WIDTH divided by bankfull channel WIDTH (W~/W~ in a riffle
section.

Channel Materials (Particle Size Indez) D50 16 mm -
The 50th percentile, or less than, from a pebble count frequency distribution of channel particles
' representing the median or dominant particle size.

Water Surface SLOPE (S) 0.0057 Ft/Ft
Average water surface slope as measured between the same position of bed features in the profile
' over two meander wave lengths. This is similaz to average banldull slope.
: fi
Channel SINUOSITY (I~ 17
Sinuosity: an index of channel pattern, determined from stream length /valley length, i.e. (SL/VL);
or estimated from a ratio of valley slope divided by channel slope (VS/ S).
~ ..~:.
For Feference, see page 5-5, 5-B'
Str@a/n Typ@ E 4 Rosgen, 1996 Applied Rn^erMorphology
© 2005 Wildland Hydrology

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Reference Reach Summary Data Form
... and Reference Reach Summary Data
,. ., ..
Mean Riffle Depth (db,~ 1.45 ;feet Mean Riffle Width (W~ :10.31; feet Mean Riffle Area (A~ 14.98 ; fcetZ

~ Mean Pool Depth (dam) 1.72;feet Mean Pool Width (W~) 10.6;feet Mean Pool Area (A~) ` 18.22,feetz
~
~ Ratio Mean Pool ~ 1 186;~~
Depth/Mean Rtffle Depth I pd~ Ratio Pool Width/Riffie ~ 10281W6~
Width ; W~ Ratio Pool Area/
Riffle Area ~ 12161Ab~
;Abp
'~ .: >.
~ Max Riffle Depth (dm,;~ 1.92;feet Max Pool Depth (dm~J 2.75;feet Max riffle depth/Mean rifIle depth; 1.324
c
t _ ,
Max pool depth/Mean riffle depth; 1.897 Point Bar Slope
<:
0.15
,,
U Streamflow: Estimated Mean Velocity at Bankfull Stage (ub~ 1 4.261 fl/s Estimation Method 1Mannings n by Stream

Streamflow: Estimated Discharge at Banldull Stage (Qb~ ~ 63.81 ~cfs Drainage Area 13;mi2

Geome =Ave. Min Max ,- Dimensionless Geomet Ratios Ave. Mm 'Max`.
~ Meander Length (Lm) ~ 83~ 57~ 108~feet Meander L,engthRatio (Lm/Wb~) ~ 8.050 5.52910.475
.. ~_
~ Radius of Curvature (Rc) 22; 18; 26;feet Radius of CurvatareJRiffle Width (Rc/Wb~ 2.134; 1.746; 2.522
- -
s a ~
m Belt Width ~'b~t) 5] ; 32; 69;feet Meander Width Ratio (Wbit/Wb~ 4.947; 3 104; 6.693
,c
c
~
;Individual Pool Length 1 17.891 12.931 26.031 feet Pool Length/Riffle Width
11.7351 12541 2.525
U _ _ -
Pool to Pool Spacing ~ 37.44 24.08 70.84~feet Pool to Pool Spacing/Riflle Width ~ 3.631 ~ 2336 6.871

Valley Slope (VS) 1 0.0097 ;fl/ft Average Water Surface Slope (S) 1 0.0057 ;fi/ft Sinuosity (VS/S) 1 1.7

Stream Length (SL)1 212 Meet Valley Length (VL) 1 122 lfeet Sinuosity (SL/VL) 1 1.738
.,.
,:._
_
Low Bank Height start; 1.62~feet
(LBH) end 2.69 feet MaxRifIle start; 1.6;feet
Depth end. 2.88~feet Bank Height Ratio start; 1.013
(LBH/MaxRiftleDepth) end~r~ 4
Facet Slo" es Ave . Mui Msv Uimcnsionless Slo "RS-tuis Ave Min ;_ Max
Riffle Slope (5,;~ O.02364.01664.0336~ft/$ Riffle Slope/Avera~c Waicr Surface Slope (S~lS) ~ 4.135 2914 5.893;
,~ Run Slope (S,,,~ ;V.03690.0308;0.0406;f1/ft Run SlopelAverage Water Surface Slope (S„m/S) ; 6.465; 5.400; 7.125;
? O
d _ ,,, _
Pool Slope (Sp) ~.0038~.0005~.00801f1/ft Pool Slope/Average Water Surface Slope (Sp/S)
; 0.6671 0.088, 1395:
.._, . .
Glide Slolw (Sg) 70.0062 0047X~ OOS71 fillt C,lidc. Slob/Average A'~uer ~urfaa Sk~lx ("Sa/S) ~ 1.0881 0 R 191 I
U Gesture blid lint ~ Ave Min Mar Dimensionless Ihpth Ratios
~ Ave Min Max;
~
i (dm~rl ~ 1.9201 1.77~~1 2.1591-feet
Ri~lle llepth Rit~le Max Depth/Riffle Mean ]~c pth (dm,;t/dh~f) ; 1.3241 1.221 1 1.483
.. .:
..
Run Depth (dam ~ 2270 2.150 2.460~feet Run Max Depth/Riffle Mean Depth (dm„m/db~

~ 1.566 1.483 ~ 1.697;
- _. _ ,__ -
Pool Depth (dmP) 2.750; 2.500; 3.130;feet Pool Max Depth/Riflle Mean Depth (d~/d~~ 1.897; 1.724; 2 159,.

Glide Depth (d°,~ , 2.110: 1.8001 2.8901feet Glide Max Depth/RifFle Mean Depth (d~/d~~ 1 l .455; 1 241: 1.9931.

~
q`?
.-.
m
~
a>

U CalaL;ories Rceche Ri171e` Bar Indices R~--ache Rif17c`
°~oSilUCltry 0 ~) 0 ~~ lll6 X42 16
%Sand 13 0 15.57 ~ D1 12.08 24.39
,
- _ - ~ , .. _ _ ,
%Gravel 82 92 81.66 ~; 1jSQ 16 31.1

Cobble 5 8 2.77 I )K4 35.9 55.56
- -
% Boulder - 0 _ ., 0 0 . _ ' ll95 ,64 79.6 B~~
2-07 ;o1rn
621 ,mm

11.34 1mm

34.39 1mm
'
,- 59.1. ,~ .:,

%Bedrock 0 0 0 D100 180 128 70 ;mm

a. The range of "feature" mid-point maximum bankfull depths, including the minimum, maximum and average values.
(Pool depths are obtained from the deepest portion of the feature.)
b. A composite sample of materials from riffle and pool featutes taken within the designated reach.
c. Sample obtained within the "active" bed of a riffle feature at the location of the cross section.
©2005 Wildland Hydrology

1
d=
C
O
N
W
Horizontal Distance (ft)
r.
~ ~ ~ r ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~~ ~ ~
Riffle - 1 +03 (Team 2 - 2006)
O Ground Points • Bankfull Indicators • Water Surface Points
Wbkf = 10.3 Dbkf = 1.5 Abkf 15

1
d=
C
O
ns
N
W
Horizontal Distance (ft)

Run - 1 +53 (Team 2 - 2006)
O Ground Points • Bankfull Indicators • Water Surtace Points
Wbkf = 10.9 Dbkf = 1.5 Abkf = 15.8

1
.-
d=
C
O
tC
N
W
Horizontal Distance (ft)

Pool - 1 +58 (Team 2 - 2006)
O Ground Points • Bankfull Indicators • Water Surtace Points
Wbkf = 10.6 Dbkf 2 Abkf = 20.9

C
O
cC
N
W
Horizontal Distance (ft)

Glide - 1 +65 (Team 2 - 2006)
O Ground Points • Bankfull Indicators • Water Surtace Points
LPbkf = 10 Dbkf 1.6 Abkf = 15.8

Trib of Meadow Fork
~--
O
C6
W
10
9
9
9
9
9
0
50 100 150 200
Distance along stream (ft)
CH
WS
• BKF
• TLB
P2
-~- P3
250 X P4
.................. .

EXISTING CHANNEL F4

Stream Classification Form
1
1
1'

C
1

Stream Channel Classification (Level 11) ...
Streaca NAME: Snow Creek, Reach - C L White -Impacted
Basip NAME; Drainage AREA: 1280 acre 2 miZ
Location:
Twp: Rge: Sec: Qtr: Lat: 36.3692 Long: 80.791
Ollservers: Date: 6/7/2006

Banldull WIDTH (Wb~ 22.75 Feet
WIDTH of the stream channel, at bankfull stage elevation, in a rifle section.

Mean DEPTH (db~ 1.46 Feet
Mean ADE~PiT~H of the stream channel cross-section, at banldull stage elevation, in a riffle section.
(~l-f-~'b6-~ "b~
,:

' Bankfull Cross Section Area (Abp 33.12 Feet
AREA of the stream channel cross-section, at bantdull stage elevation, in a riffie section.

WIDTH /DEPTH RATIO (Wb~ /db~ 15.58 Ft/Ft
Banldull WIDTH divided by banldull mean DEPTH, in a riffie section.

Mazimnm DEPTH (dm,;~ 2 Feet
Maximum depth of the bankfull channel cross-section, or elevation between the banldull stage and
thaiweg in a riffie section.

'` Flood-Prone Area WIDTH (W~ 27.27 Feet
The stage/elevation at which flood-prone area WIDTH is detemvned in a rifee section at twice
maximum DEPTH, or (2 x d~

Entrenchment RATIO (ER) 1.2 Ft/Ft
The ratio of flood-prone area WIDTH divided by bankfull channel WIDTH (W~,/Wb~ in a riflie
section.

Channel Materials (Particle Size Indez) D50 45 mm
The 50th percentile, or less than, from a pebble count frequency distnbution of channel particles
representing the median or dominant particle size.

Water Surface SLOPE (S) 0.00626 Ft/Ft
Average water surface slope as measured between the same position of bed features in the profile
over two meander wave lengths. This is similar to average bankfull slope.

Channel SINUOSITY (I~ 1.15
Sinuosity: an index of channel pattern, determined from stream length /valley length, i.e. (SL/VL);
or estimated from a ratio of valley slope divided by channel slope (VS/ S).

Stream Type
F 4 For Reference, sse page 5:; 5~6:
,,, ,~_ ~~~ R;~r ~y
© 2005 Wildland Hydrology

Reference Reach Summary Data Form
... and Reference Reach Summary Data
Mean Riffle Depth (dam 1.46;feet Mean Riffle Width (Wb~ : 22.75;feet Mean Riffle Area (A~ € 33.12; feei~

~ Mean Pool Depth (dam 1.53;feet Mean Pool Width (VJb~) 23.8;feet Mean Pool Area (A~ _ 36.4;feet~
o ..

~ Ratio Mean Pool ~ 1.048~~~
Depth/Mean Kittle Depth ~ ~~kr Ratio Pool Width/Ri$le e 1.046 Wb~/
Width ; W~ Ratio Pool Area/ ~
Riffle Area I.0991A6~
;A~
0 _~ .., ,:.: ,
~ Max Riffle Depth (d~;~ 2;feet Max Pool Depth (dm~~) 3.13;feet Max rifle depth/Mean riffle depth; 1.37
c
t ,
Max pool depth/Mean riffle depth; 2.144 '
Point Bar Slope
~
U _
Streamflow: Estimated Mean Velocity at l3ankfull Stage (ub~ 1 3.651ft/s Estimation Method 1
.,: :.
Streamflow : F.stim.tted Discharge at Bank}uIl Stage (Q~ 98;cfs Drainage Area 2,mt2

Geome Ave Min g: Max Dimensionless Geom~ Ratios ` Ave , Min Max
~ Meander Length (Lm) ~ t56~ 89~ 224~feet Meander Length Ratio (Lm/Wb~ ~ 6.857 3.912 9.846 ::
L
:-.
..
~ Radius of Curvature (Rc) 38; 14.7; 61.3;feet Radius of Curvature/Riff]e Width (Rc/VJb~ 1.670; Q646; 2.695
d _ ::
Belt Width (Wb>J 49; 39; 601fcet Meander Width Rario (Wbh/Wb~ ; 2.154; 1.714; 2.637

`; ~ Individual Pool Length 1 32.8Tr 14.241 48291feet Pool Length/Riffle Width 11.4451 0.6261 2.123

Pool to Pool Spacing ~ 74.59 30.74 132.3~feet Pool to Pool Spacing/Riffle Width ~ 3279 1351 ~ 5.814

Valley Slope (VS) 1 0.0069 1ft/ft Average Water Surface Slope (S) 0.003 ;ft/ft Sinuosity (VS/S) 1 1.15

Stream Length (SL) . 0 lfeet Valley Length (VL,) 1 0 lfeet Sinuosity (SL/VL) 1 #####

Low Bank Height start€ Ofeet
---
(LBH) end: O~feet Max Riffle dart; _ _O;fcet
-
Depth ends O~feet Bank Height Ratio ~; ~;

(LBH/Max Riffle Depth) end ##!k## ~'
Facet Slo 'c.4 Ave Min Mgx Dianeq~sionless Slo _ Ratws
~ 'Ave Min Mux
(S,;F) ;0.01I10.00210.0?18~ft1ft Ri1Tlc til~rpe/Aver~~c Vv'atcr tiurface S1o~0e (5,;~/S) ~ 3.710; 0.690; 7273;;
Riffle Slope
_...
O Run Slope (S,,,~ ;0.00670.00350.0097;ft/ft Run SlopeJAverage Water Surface Slope (S~,m/S) 2.230; L163; 3230;
_. v
L
~-
Pool Slope (SP) 'A.000610.000110.OOt 11ft/fl Pool SlopelAverage Water Surface Slope (S~/S) :0210. 0.0471 0.3531;
m
m Glide Slope (Sw) 10.0048X1002010 00901ft/ft Glide Slope/Average Water Surface Slope (S~/Sl ~ 1.6131 0.6501 2.9871;
.c
U
Feature Mid int'.=.~ive I~1in Max:. Dimensiool~ss Dcpth Ratios
Ave hlin Max -
Riffle Depth (dam ~ 2.000 2.000 2.000~f%c;t Ri1}lc Max Depth/Riftlc Mian Depth (d~/d~,~ ~ 13701 1.3701 1.370
Run Depth (dam 2370 ~ 2.110 2.630; feet Run Ivfax Depth/Kiffle Mean Depth (d~,mld~ 1 1.623 ~ 1.445 ~ 1.801
,:_ .rn,:_. .,. ,....,... ,..~~,
Pool Depth (dmP) 3.130; 2.890; 3290;feet Pool Max Depth/Riffle Mean Depth (d~,/d~ 2.144; 1.979; 2.253;.,;
Glide Depth (d,o~ 1 2.0201 1.5701 22601feet Glide Max Depth/Riflle Mcan Ik,pt6 (d~/dt,,f) 1 13841 1.0751 15481:

w
~
~~
~
„ ~
,' m

U Catagories Keacllh: RifBe`; Rar tndi~ Rcachb Riffle
°o SilL~Clay 0 ~ 0 0 1 - lll6 0.38 13.01
_ _. -
% Sand 56.86 4 0 D35 0.59 22.6

: % Gravel 3726 72 72.44 1 D50 0.9 34J9
~.
%Cobble 5.88 21 27.56 ~ D84 2225 95.43
% Boulder 0 3 0 1 D95 67.89 205.33
, Bar
7_~7 ; mm
_.
2Q29 ;mm
__ _ s
31.92 1mm

83.44 ~mm
101.7I lmtn
° 6 Bedrock 0 0 0 D 100 90 362 110 ;mm

a The range of "feature" mid-point maximum banidull depths, including the minimum, maximum and average values.
(Pool depths are obtained from the deepest portion of the feature.)
b. A composite sample of materials from riffie and pool features taken within the designated reach
c. Sample obtained within the "active" bed of a rfffie featwe at the location of the cross section.
©2005 Wildland Hydrology

Riffle C~ 12+99
o Ground Points ~ Bankfull • Water Surface
Indicators Points
Wbkf = 19.7 Dbkf = 1.4 Abkf = 27.3
11i
~ 11i
O
N
W 11
11
Horizontal Distance (ft)
.. .^. . ... ~.. .. ... .. .. :~ .. .. .. .. ~.. .. .~r~ ~ ..r
0 10 20 30 40

Riffle 12+99
ELEV DEPTH AREA WET PER WIDTH HYD RAD MEAN D SLOPE ROUGH R/D84 VELOCITY U/U` U^2/2g DISCHARGE SHEAR POWER POWER/W FROUDE TRANSPORT
(ft) (ft) (sq ft) (ft) (ft) (ft) (ft) (ft/ft) [f] (fps) (ft) (cfs) (psf) (Ib/s) (Ib/fUs) (Ib/s)
1159.32 0.1 0.16 3.14 3.13 0.05 0.05 0.006 6.1289 0.16 0,11 1.14 0 0.02 0.02 0.01 0 0.09 0
1159.42 0.2 0.54 4.66 4.84 0.12 0.12 0.006 9.92473 0.38 0.14 0.9 0 0.07 0.04 0,03 0.01 0.07 0
1159.52 0.3 1.08 6.1 B 6.15 0.18 0.18 0.006 2.1955 0.58 0.36 1.91 0 0.38 0.07 0.14 0.02 0.15 0
1159.62 0.4 1.77 7.47 7.4 0.24 0.24 0.006 1.1599 0.77 0.67 2.63 0 1 0.08 0.37 0.05 0.2 0
1159.72 0.5 2.56 8.51 8.41 0.3 0.3 0.006 0.78978 6,96 0,77 3.18 0.01 1.96 0.11 0.73 0.09 0.25 0
1159.82 0.6 3.6 12.67 12.52 0.28 0.29 0.006 0.74934 0.8 0.76 3.27 0.01 2.74 0.1 1.02 0.08 0.25 0
1159.92 0.7 4.9 13.64 13.45 0.36 0.36 0,006 0.56647 1.15 0.99 3.76 0,02 4.86 0.13 1.82 0.14 0.29 0
1160.02 0.8 6.29 14.6 14.37 0.43 0.44 0.006 0.46226 1.38 1.21 4.21 0.02 7.62 0.16 2.85 0.2 0.32 0
1180,12 0.9 7.78 15.57 15,3 0.5 0,51 0.006 0.38633 1.8 1.41 4.55 0.03 11 0.19 4,12 0.27 0.35 0
1180.22 1 9.35 16.54 18.23 0.57 0.58 0.008 0.33987 1.83 1.81 4.85 0.04 15.08 0.21 5.64 0.35 0.37 0
1180,32 1.1 10.99 18.94 18.57 0.85 0.B6 0.006 0,30178 2.09 1.82 5.15 0.05 20.05 0.24 7.51 0.45 0.4 0
1180.42 1.2 1x.87 17.35 16.92 0.73 0.75 0.006 0.27077 2.34 2.04 5,44 0.06 25.88 0.27 9,68 0.57 0.42 0
1180.52 1,3 14.38 17.75 17.27 0,81 0.83 0,006 0.2487 2,6 2,24 5.67 0.08 32.28 0,3 12.08 0.7 0.43 0
1160.62 1.4 18.12 18.18 17.62 0.89 0.92 O.OOB 0.22937 2.68 2.45 5.91 0.09 39.48 0.33 14.78 0.84 0.45 0
1180,72 1.5 17.9 18.58 17.98 0.96 1 0,006 0.21483 3.08 2.63 6.1 0.11 47.04 0.38 17.81 0.98 0.48 0
1160.82 1.6 19.72 18,96 19.31 1.04 9.08 0,006 0,20255 3.34 2.82 8.26 0,12 55.55 0.39 20.8 1.14 0,48 0
1180,92 1.7 21.58 19.37 18.68 1.11 1.18 0.006 0.19204 3.56 2,99 6.45 0.14 84.44 0.42 24.13 1.29 0.49 0
1161.02 1.8 23.45 19.77 19.01 1.19 1.23 0.008 0.1837 3.82 3.18 6.8 0.16 74.2 0.45 27.78 1.46 0.6 0
1161,12 1.9 25.36 20.17 19.35 1.26 1.31 0.006 0.17581 .4.04 3.33_ 6.75_ 0.17 84.45 0.47 31.82 1.83 0.51 0
1161.32 2.1 29.3 20.96 20.02 1.4 1.46 0.006 0,16285 4.49 3,65 7.01 0.21 108.87 0,52 40,01 2 0.53 0
1181.42 2.2 31.32 21.35 20.34 1.47 1.54 0.008 0.15889 4.72 3.81 7.14 0.22 119.19 0.55 44.82 2.19 0.54 0
1181.52 2.3 33.37 21.74 20.87 1.54 1.61 0.008 0.15213 4.94 3.96 7.25 0.24 132 0.58 49.42 2.39 0.55 0
1161.82 2.4 35.46 22.19 21.06 1.6 1.68 0.006 0.14777 5.13 4.09 7.36 0.26 145.08 0.6 54.31 2.58 0.58 0
1161.72 2.5 37,58 22.64 21.44 1.88 1.75 0.006 0.14377 5.33 4.22 7.46 0.28 158.75 0.62 59.44 2.77 0.58 0.28
1161.82 2.6 38.75 23.09 21.83 1.72 1.82 0.008 0.14007 5.52 4.36 7.58 0.29 173.17 0.84 64.84 2.87 O.b7 1.23
1161.92 2.7 41.95 23.54 22.22 1.78 1.89 0.008 0.13884 5.71 4.49 7.65 0.31 188.24 0.67 70.48 3.17 0.58 2,59
1182.02 2.8 44.19 23.99 22.61 1,84 1.95 0.006 0.13376 5.9 4.81 7.73 0.33 203.78 0.89 76.29 3.37 0.58 4.04
1162.12 2.9 46.47 24.44 23 1.8 2.02 0,006 0.13078 6.1 4.74 7.82 0.35 220.21 0,71 82.44 3.58 0.59 8
1182.22 3 48.79 24.86 23.37 1.96 2.09 0.008 0.12789 6.29 4.87 7.91 0.37 237.37 0.73 88.87 3.8 0.59 8.22
1162.32 3.1 51.15 25.28 23.74 2.02 2.15 0.006 0.12562 6.48 4.99 7.98 0.39 255 0.76 95.47 4.02 0.6 10.39
1162.42 3.2 53.54 25.71 24.11 2.08 2.22 0.006 0.12315 8.67 5.11 8.06 0.41 273.55 0.78 102.42 4.25 0.6 13.12
1162.52 3.3 55.97 28.13 24.49 2.14 2.29 0.008 0.12082 6.87 5.23 8.14 0.43 292.85 0.8 109.84 4.48 0.61 18.1
1162.62 3.4 58.44 26.55 24.86 2.2 2.35 0.006 0.11884 7.06 5.35 8.2 0.44 312.6 0.62 117.04 4.71 0.61 18.93
1162.72 3.5 81.23 29.85 28.03 2.05 2.18 0.006 0.12196 6.58 5.1 8,1 0.4 312.09 0.77 116.85 4.17 0.61 1592
1162.82 3.6 64.04 30,15 28.2 2.12 2.27 0.006 0.11926 6.8 5.24 8.19 0.43 335.68 0.78 125.68 4.46 0.61 20.14
1

1

C
O
N
W
1
f
1
Horizontal Distance (ft)
3
~ ~ ~ i ~ ~ ~ ~ ll~ llllllllllllllli ~ llr ~ ~ l~ ~ ~~ l~ lllll~
Riffle @ 16+64
O Ground Points • Bankfull Indicators • Water Surface Points
Wbkf = 22.7 Dbkf = 1.5 Abkf 33.1

Riffle 16+64
ELEV DEPTH AREA WET PER WIDTH HYD RAD MEAN D SLOPE ROUGH R/D84 VELOCITY U!U' U^2/2g DISCHARGE SHEAR POWER POWERNV FROUDE TRANSPORT
(ft) (ft) (sq ft) (ft) (ft) (ft) (ft) (fUft) [ff (fps) (ft) (cfs) (psf) (Ib/s) (Ib/ft/s) (Ib/s)
1158.72 0.1 0.17 3.51 3.5 0.05 0.05 0.003 6.1288 0.16 0.08 1.14 0 0.01 0.01 0 0 0.06 0
1158.82 0.2 0.64 5.91 5.9 0.11 0.11 0.003 14.26134 0.35 0.08 0.75 0 0.05 0.02 0.01 0 0.04 0
1158.92 0.3 1.33 7.78 7.71 0.17 0.17 0.003 2.43898 0.55 0.23 1.81 0 0.31 0.03 0.06 0.01 0.1 0
1159.02 0.4 2.19 9.65 9.52 0.23 0.23 0.003 1.22889 0.74 0.38 2.55 0 0.63 0.04 0.18 0.02 0.14 0
1159,12 0.5 3.27 12.27 12.08 0.27 0.27 0.003 0.88745 0,87 0.48 3 0 1.59 0.05 0.3 0.02 0.16 0
1159.22 0.6 4.6 14.89 14.64 0.31 0.31 0.003 0.69963 0.99 0.59 3.38 0.01 2.88 0.06 0.5 0.03 0.19 0
1159.32 0.7 6.3 19.71 19.4 0.32 0.32 0.003 0.83247 1.03 0.83 3.58 0.01 3.94 0.06 0.74 0.04 0.19 0
1159.42 0.8 8.25 19.95 19.53 0,41 0.42 0.003 0.48987 1.32 0.82 4.13 0.01 6.77 0.08 1.27 0.08 0.22 0
1159.52 0.9 10.21 20.18 19.85 0.51 0.52 0.003 0.3807$ 1.84 1.02 4.58 0.02 10,39 0.1 1,94 0.1 0.25 0
1159.82 1 12.18 20.42 19.76 0.8 0.82 0.003 0.32424 1.92 1.2 4.97 0.02 14.57 0.11 233 0.14 0.27 ~ 0
1159,72 1.1 14.17 20.66 19.91 0.69 0.71 0,003 0.28785 2.21 1,38 5.27 0.03 19.29 0.13 3.61 0.18 0.28 0
1159.82 1.2 18,18 20.89 20.03 0.77 0.81 0.003 0.25812 2,47 1.52 5.57 0.04 24.54 0.14 4.59 0.23 0.3 0
1159,92 1.3 18.18 21.21 20.28 0.86 0,9 0.003 0.23899 2.76 1,87 5.81 0.04 30.44 0.16 5.7 0.28 0.31 0
1180.02 1.4 20.22 21.54 20.52 0.94 0.99 0.003 0.21993 3.02 1.82 6.03 0.05 36.75 0.18 8.88 0.34 0.32 0
1160,12 1.5 22.28 21,86 20.76 1.02 1.07 0.003 0.20691 3.27 1.95 6.22 0.06 43.49 0.19 8.14 0.39 0.33 0
1160.22 1.6 24.37 22.18 21 1.1 1.18 0.003 0.1949 3.53 2.09 6.41 0.07 50.9 0.21 9,53 0,45 0.34 0
1180,32 1.7 28.49 22.7 21.44 1.17 1.24 0.003 0.18543 3.75 2.21 8,57 0.08 58.49 0.22 10.95 0.51 0.35 0
1180.42 1.8 28.66 23.22 21.87 1.23 1.31 0.003 0.17784 3.95 2.31 8.71 0.08 88.28 0.23 12,4 0.67 0.38 0
1160.52 1.9 30.87 23,74 22.31 1.3 1.38 0.003 0.17107 4.17 2.42 8.84 0,09 74.81 0.24 14 0.83 0.36 0
1180,72 2,1 35.41 24.83 23.03 1.44 1.54 0.003 0.1585 4.62 2.65 7,1 0,11 93.83 0.27 17,58 0.76 0.38 0
1180.82 2.2 37.73 25.01 23.32 1.51 1.82 0.003 0.15315 4.84 2.78 7.23 0.12 104.15 0.28 19.5 0.84 0.38 0
1180,92 2.3 40,07 25.38 23,81 1.58 1,7 0.003 0.1483 5.07 2.87 7.34 0,13 114.98 0,3 21.52 0.91 0.39 0
1161.02 2.4 42.4b 25.7fi 23.89 1.65 1.78 0.003 0,14388 5.29 2.98 7.48 0.14 128.37 0.31 23.88 0.99 0.39 0
1181,12 2.5 44,85 26.13 24,18 1,72 1.86 0.003 0.14017 5,52 3.08 7.55 0.15 138.11 0,32 25.85 1.07 0.4 0
1181.22 2.6 47.28 28.51 24.47 1.78 1.93 0.003 0.13642 5.71 3.18 7.86 0.16 150.14 0.33 28.11 1.15 0.4 0
1161.32 2.7 49.75 26.89 24.76 1.85 2.01 0.003 0.13296 5.94 3.28 7.76 0.17 163.14 0.35 30.54 1.23 0.41 0
1181.42 2.8 52.24 27.28 25.04 1.92 2.09 0.003 0.12975 6.16 3.38 7.85 0.18 176.86 0.38 33.07 1.32 0.41 0
1181.52 2.9 54.75 27.5 25,18 1,98 2.18 0.003 0.12652 6.38 3,49 7.95 0.19 180.88 0.37 35.73 1.42 0.42 0
1161.62 3 57.27 27.73 25.28 2.06 2.27 0.003 0.12353 6.81 3.59 8.05 0.2 205.59 0.39 38.49 1.52 0.42 0
1161.72 3.1 59.8 27.97 25.4 2.14 2.35 0.003 0.12096 8.87 3.7 8.13 0,21 221.12 0,4 41.39 1.63 0.43 0
1161.82 3.2 62.35 28.2 25.51 2.21 2.44 0.003 0.11838 7.09 3.8 8.22 0.22 236.64 0.41 44.34 1.74 0.43 0
1161.92 3.3 84.9 28.44 25,63 2.28 2.53 0,003 0.11592 7.31 3.9 8.31 0.24 253.03 0.43 47.37 1.85 0.43 0
1162.02 3.4 67.47 28.67 25.75 2.35 2.62 0.003 0.11383 7.54 4 8.39 0.25 269.73 0.44 50.48 1.98 0.44 0
1162.12 3.5 70.05 28.91 25.87 2.42 2.71 0,003 0.11148 7.76 4,1 8.47 0.26 288.91 0.45 53.71 2.08 0.44 0.
1162.22 3.6 72.66 29.26 26.15 2.48 2.78 0.003 0.10977 7.96 4.18 8.54 0.27 303.81 0.48 58.84 2.17 0.44 0
1182.32 3.7 75.28 29.61 26,43 2,54 2.85 0,003 0,10814 8.15 4.26 8.6 0.28 320.73 0.48 60.04 2.27 0.44 0
1162.42 3.8 77.94 29.97 28.71 2.8 2.92 0.003 0.10859 8.34 4.34 8.68 0.29 338.38 0.49 63.35 2.37 0.45 0
1162.52 3.9 80.63 30.32 26.99 2.66 2.99 0.003 0.10511 8.53 4.42 8.72 0.3 358.57 0.5 68.75 2.47 0.45 0
1162.62 4 83.34 30.87 27.27 2.72 3.06 0.003 0.10389 8.73 4.5 8.78 0.31 375.23 0.51 70.24 2.58 0.45 0
1182.72 4,1 88,1 31,41 27.86 2.74 3,08 0.003 0.10298 8.79 4,53 8.81 0.32 390,42 0.51 73.08 2.61 0.48 0
1162.82 4.2 88.93 32.15 28.64 2.77 3.11 0.003 0.10215 8.89 4.58 8.85 0.33 407.1 0.52 78.21 2.66 0.46 0
1162.92 4.3 91.83 32.88 29.32 2.79 3.13 0.003 0.10148 8.95 4.81 8.88 0.33 423.28 0.52 79.24 2.7 0.46 0
1183.02 4.4 94.8 33.62 30 2.82 3.16 0.003 0.1007 9.05 4.65 8.91 0.34 441.01 0.53 82.56 2.75 0.46 0
1183.12 4.5 97.88 35.43 31.8 2.76 3.08 0.003 0.1013 8.85 4.59 8.69 0.33 449.14 0.52 84.08 2.64 0.46 0
1163.22 4.6 101.16 37.31 33.67 2.71 3 0.003 0.10183 8.69 4.53 8.86 0.32 458.54 0.51 85.84 2.55 0.46 0
1183.32 4.7 104.56 38.09 34.33 2.75 3.05 0.003 0.1009 8.82 4.59 8.9 0.33 479.87 0.51 89.83 2.62 0.46 0

1

ENTRAINMENT CALCULATION FORM
Stream: ~^ Reach: _
Team: Date: z
Information Input Area
D50 Riffle bed material D50 (mm)
D"SO Bar sample D50 (mm)
D; Largest particle from bar sample (mm) 0.33 (feet) so4.a mmifoot
Se Existing bankfull water surface slope (ft/ft)
de Existing bankfull mean depth (ft)
R H draulic Radius of Riffle Cross Section (ft)
1.65 yg Submerged specific weight of sediment

Calculation of Critical Dimensionless Shear Stress
1.50 D50/D"50 If value is between 3-7 Equation 1 will be used: T'a = 0.0834(D50/D"SO)-0.e'2
2.87 DfD50 If value is between 1.3-3.0 Equation 2 will be used: T'q = 0.0384(DfD50)-o.es~
0.0151 T'G Critical Dimensionless Shear Stress Equation used: 2

Calculation of Bankf ull Mean Depth Required for Entrainment of Largest Particle in Bar Sample

2.72 d~ Required bankfull mean depth (ft) d~ = T*G"YSD~
S8

0.54 de/d~ Existina mean- bankfull depth
Re uired mean bankfull depth Stable
(d/d~ = 1)
Stable Vertical Stabili of Stream

Calculation of BKF Water Surface Slope Required for Entrainment of Largest Particle in Bar Sample

0.0056 S~ Required bankfull water surface slope (ft) S~ = T'~; SD;
de

0.54 Se/S~ Existing water surface slope
R uired water surface sloe Stable
(S/S~ = 1)
Stable Vertical Stabili of Stream

Sediment Transport Validation
0.26 Bankfull Shear Stress T~ =yRS (Ib/ft2) y =Density of water = 62.4 Ibs/ft3

55 Moveable particle size (mm) at bankfull shear stress (predicted by the Shields Diagram: Blue field
book:p238, Red field book:p190)

0.56 Predicted shear stress required to initate movement of D; (mm) (see Shields Diagram: Blue field
book: 238, Red field book: 190

C.L. White -Existing Profile -Lower Reach

1
• CH
o WS
• BKF
C
O
fU
N
W
Distance along stream (ft)
• P1
o P2
+ P3
x P4

1
1
1
1
DEIGN E4b-

t
1
1
1
1
1
t
1
MORPHOLOGICAL CHARACTERISTICS OF THE EXISTING AND PROPOSED
CHANNEL WITH REFERENCE REACH DATA
(After Rosgen, 1996)
Restoration Site (Name of Stream ~ location): Trib. To Snow Creek, Surry County
Reference Reach (Name of stream ~ location): Trib. To Meadow Fork Creek, Alleghany County
VARIABLES EXISTING PROPOSED REFERENCE
CHANNEL REACH REACH
1. Stream type E4b E4b E4
2. Drainage area 0.1 0.1 1.3
s . mi.
3. Bankfull width Mean: 5.1 Mean: 5.1 Mean: 10.9
(wbkf) - ft.
Range: Range: Range: 10.3 -11.6
4. Bankfull mean Mean: 0.55 Mean: 0.55 Mean: 1.33
depth (db,~) - ft.
Range: Range: Range: 1.2 -1.45
5. Width/depth Mean: 9.3 Mean: 9.3 Mean: 8.2
ratio (wbkr/db~)
Range: Range: Range: 7.1' - 9.7
6. Bankfull cross- Mean: 2.8 Mean: 2.8 Mean: 14.3
sectional area Range:
qb~ _ s , ft. Range: Range: 13.6 -15
7. Bankfull mean Mean: 4 Mean: 4 Mean: 4.3
velocity (vb,~) - f/s
Range: Ran e: Ran e:
8. Bankfull discharge, 11.2 11.2 64
CfS Qbkf
9. Bankfull Mean: 0.9 Mean: 0.9 Mean: 1.7
Maximum depth
dm~ _ ft Range: Range: Range: 1.5 -1.9
10. Max d~/db,~ ratio Mean: 1.6 Mean: 1.6 Mean: 1.3
Ran e: Ran e: Ran e: 1.25 -1.32
11. Riffle Length (L~ff) Mean: Mean: 27 Mean: 20
_ ft. Range: Range: 7.5 - 63 Range: 5 - 46
12. Ratio riffle length Mean: Mean: 1.8 Mean: 1.8
to bkf width Range: Range: 0.5 - 4.2 Range: 0.5 - 4.2
L~ ~bkf
13. Low bank height Mean: Mean: 1.0 Mean: 1.0
to max. d~ ratio Range: Range: Range:
14. Width of Mean: 11.6 Mean: 20 Mean: 151
flood prone area
wf a _ ft Range: Range: 15.3 - 25 Range: 81 - 292
15. Entrenchment Mean:2.2 Mean: 4 .Mean: 13.9
ratio (w~/wb,~) Range: Range: 3 - 5 Range: 7 - 28.3
Page 1 of 5
09/18/06

D

1
1

1
1
VARIABLES EXISTING PROPOSED REFERENCE
CHANNEL REACH REACH
16. Meander length Mean: Mean: 40.5 Mean: 88
(Lm) _ ft. Range: Range: 25 - 61.5 Range: 54 -134
17. Ratio of Mean: Mean: 8.1 Mean: 8.1
meander length
to bankfull Range: Range: 5 -12.3 Range: 5 -12.3
width L,,,/wb,~
18. Radius of Mean: Mean: 11 Mean: 23.5
curvature (R~) -
ft Range: Range: 6 -17.5 Range: 12.3 - 38
19. Ratio of radius Mean: Mean: 2.2 Mean: 2.2
of curvature to
full width
an
k
b Range: Range: 1.2 - 3.5 Range: 1.2 - 3.5
p
~
~
~ ~d ~~bkf
20. Belt width (wb,f) Mean: Mean: 22.5 Mean: 49
- ft.
Range: Range: 14.5 - 31.5 Range: 32 - 69
21. Meander width Mean: Mean: 4.5 Mean: 4.5
ratio (wbn/wb,~)
Range: Range: 2.9 - 6.3 Range: 2.9 - 6.3
22. Sinuosity = k 1.3 1.3 1.5
(Stream Lengthfnal~
valle distance
23. Valley slope 0.0364 0.0364 0.0127
ft/ft
24. Average water 0.028 0.028 0.008
surface slope-ft/ft
Sav = Svalle k
25. Pool slope Mean: Mean: 0.0034 Mean: 0..0014
(spa) - ft/ft Range: 0.0006 - 0.0064
Range: Ran e:0.0002 - 0.0026
26. Ratio of pool Mean: Mean: 0.12 Mean: 0.12
slope to
average slope Range: Range: 0.021 - 0.23 Range: 0.021 - 0.23
S ~Sbkf
27. Maximum Mean: Mean: 1.2 Mean: 2.55
pool depth
d max ol) _ ft Range: Range: 0.94 -1.5 Range: 2.0 - 3.2
28. Ratio of pool Mean: Mean: 2.2 Mean: 2.2
depth to
average Range: Range: 1.7 - 2.8 Range: 1.7 - 2.8
bankfull depth
dmax dbkf
29. Pool width Mean: 6.4 Mean: 5.5 Mean: 17.9
yy I _ ft. Range: Range: 4.5 - 5.8 Range:
30. Ratio of pool Mean: 1.0 Mean: 1.1 Mean: 1.1
width to
bankfull width Range: Range: 0.9 -1.15 Range: 0.9 -1.15
W I/Wbkf
31. Pool Area - sq ft Mean: 3.6 Mean: 3.5 Mean: 17.8
A I Range: Range: 3.4 - 3.6 Range: 17.3 -18.2
' Page 2 of 5 09/18/06

L

1
1
1
VARIABLES EXISTING PROPOSED REFERENCE
CHANNEL REACH REACH
32. Ratio of Pool Mean: Mean: 1.25 Mean: 1.25
Area to Bankfull
Area A ;/Abp
Range:
Range: 1.2 -1.3
Range: 1.2 -1.3
33. Pool to pool Mean: Mean: 20.5 Mean: 45
spacing (p-p) -
ft Range: Range: 11- 34 Range: 24 - 74
34. Ratio of p-p Mean: Mean: 4.1 Mean: 4.1
spacing to
bankfull width Range: Range: 2.2 - 6.8 Range: 2.2 - 6.8
p- ~bkf
35. Pool length (L~;) Mean: Mean: 5.5 Mean: 17.4
_ ft. Range: Range: 2.5 -10 Range: 7.7 - 32.6
36. Ratio of Pool Mean: Mean: 1.1 Mean: 1.1
length to
bankfull width Range: Range: 0.5 - 2.0 Range: 0.5 - 2.0
L I~bkf
37. Avg. riffle slope Mean: Mean: 0.056 Mean: 0.0126
s~ - ft./ft. Range: Range: 0.036 - 0.062 Range: 0.006 - 0.017
38. Ratio of riffle Mean: Mean: 2.0 Mean: 1.35
slope to avg.
slope sr;ff/sa„ Range: Range: 1.3 - 2.2 Range: 0.63 -1.8
39. Avg. run scope Mean: Mean: 0.045 Mean: 0.0146
ft/ft Range: Range: 0,039 - 0.062 Range: 0.005 - 0.022
40. Ratio of run Mean: Mean: 1.6 Mean: 1.6
slope to avg
slo a s~,~/sa„ Range: Range: 1.4 - 2.2 Range: 0.6 - 2.4
41. Avg. glide slope Mean: Mean: 0.0056 Mean: 0.0054
ft/ft Range: Range: 0.0042 - 0.0084 Range: 0.001 - 0.0158
42. Ratio of glide Mean: Mean: 0.2 Mean: 0.58
slope to avg
sloes ;;d~/sa„ Range: Range: 0.15 - 0.3 Range: 0.12 -1.68
43. Max run depth Mean: Mean: 0.88 Mean: 2.1
dm~ N~ _ ft, Range: Range: 0.83 -1.0 Range: 1.7 - 2.5
44. Ratio of max. run Mean: Mean: 1.6 Mean: 1.6
depth to mean bkf
de th dm~ ti~dbkf Range: Range: 1.5 -1.8 Range: 1.5 -1.8
45. Run width (w~,~) Mean: Mean: 4.5 Mean: 10
_ ft, Range: Range: 4.4 - 4.75 Range: 9.6 -10.4
46. Run width to Mean: Mean: 0.9 Mean: 0.9
bankfull width Range: Range: 0.88 - 0.95 Range: 0.88 - 0.95
ratio wN~/wbkf
47. Mean run depth Mean: Mean: 0.56 Mean: 1.38
dN~ ft. Range: Range: Range: 1.2 -1.5
48. Run w/d ratio Mean: Mean: 8.1 Mean: 7.24
w~,~/dti~ Range: Range: 7.4 -10.2 Range: 6.4 - 8.7
49. Ratio of run w/d Mean: Mean: 0.88 Mean: 0.88
to riffle w/d Range: Range: 0.8 -1.1 Range: 0.8 -1.1
50. Run length (Lti~) Mean: Mean: 4 Mean:8.4
_ ft. Range: ~ Range: 2.5 - 6.5 Range: 5.0 -13.8
' Page 3 of 5 09/18/06

VARIABLES EXISTING PROPOSED REFERENCE
CHANNEL REACH REACH
51. Ratio of run Mean: Mean: 0.8 Mean: 0.8
length to bankfull Range: Range: 0.5 -1.3 Range: 0.5 -1.3
width L~,„/wb,~
52. Max. glide depth Mean: Mean: 0.77 Mean: 1.8
dmax rae _ ft, Range: Range: 0.7 - 0.85 Range: 1.7 - 2.1
53. Ratio of max. Mean: Mean: 1.4 Mean: 1.4
glide depth to
mean bkf depth Range: Range: 1.25 -1.55 Range: 1.25 -1.55
dmax iide/d~
54. Glide width Mean: Mean: 4.6 Mean: 9.7
yy i~ae _ ~_ Range: Range: 4.3 - 4.65 Range: 9.3 -10
55. Ratio of glide Mean: Mean: 0.9 Mean: 0.89
width to bankfull Range: Range: 0.85 - 0.91 Range: 0.85 - 0.91
width w ,;d~/w~
56. Glide mean Mean: Mean: 0.6 Mean: 1.4
de th d ,;de - ft. Range: Range: Range: 1.1 -1.6
w/d ratio
57. Glide Mean: Mean: 7.8 Mean: 6.9
/
w lide~d tide Range: Range: 6.5 -10.2 Range: 5.8 - 9.1
58. Ratio of glide w/d Mean: Mean: 0.84 Mean: 0.84
to riffle w/d Range: Range: 0.7 -1.1 Range: 0.7 -1.1
59. Glide length Mean: Mean: 3.6 Mean: 7.2
L i;~ _ {{. Range: Range: 2.5 - 4.5 Range: 5.8 -10.2
60. Ratio of glide Mean: Mean: 0.7 Mean: 0.7
length to bankfull
width L ,;de/wb,~) Range: Range: 0.5 - 0.9 Range: 0.5 - 0.9
MATERIALS:
1. Particle Size
Distribution of
Channel Material
mm
D 16 1.8 1.8 4.4
D 35 16.5 16.5 12.1
D 50 35.3 35.3 16
D 84 112.9 112.9 35.9
D 95 162.4 162.4 64
Remarks: The dimension, pattern and profile for this section of stream are stable. The flood-
prone width will be expanded and a Bankfull bench constructed to reduce low bank height.
Livestock will be excluded from the stream.
Page 4 of 5
09/18/06

VARIABLES EXISTING PROPOSED REFERENCE
CHANNEL REACH REACH
MATERIALS:
2. Particle Size
Distribution of
Riffle Bed
Material mm
D ~s 12.7 12.7 16
D ss 33.1 33.1 24.4
D so 55.6 55.6 31.1
D ~ 123.9 123.9 55.6
D s5 170.3 170.3 79.6
3. Particle Size
Distribution of
Bar Material mm EXISTING
CHANNEL PROPOSED
REACH REFERENCE
REACH
D ~ s 1.65 1.65 2.07
D ss 7.94 7.94 6.2
D so 15.7 15.7 11.34
D ~ 43.8 43.8 34.4
D ss 60.45 60.45 59.1
Largest size particle
at the toe (lower third)
of bar mm 68 68 70
SEDIMENT TRANSPORT VALIDATION
(BASED ON BANKFULL SHEAR STRESS)
Existin Condition
Pro osed Condition
Bankfull shear stress -Calculated value (Ib/ft) 0.89 0.89
Critical shear stress -Value from Shields Diagram(Ib/ )
OR Grain Diameter from Shields Diagram (mm)
Relation ad`usted to include field data 142mm 142mm
Critical dimensionless shear stress 0.028 0.028
Minimum mean dbkf calculated using critical
dimensionless shear stress a nations 0.36 0.5
Manning's "n" 0.038 0.038
These values and ratios were calculated and proposed by:
Name: Alan Walker
Stream Walker Consulting Date: August, 2006
Page 5 of 5
09/18/06

7

1
f

Stream Classification Form
Stream Channel Classification (Level Iq ...
Stream NAME: Snow Creek Tnb., Reach -Reach 1
Basin NAME: Drainage AREA: 64 acre 0.1 mil
Location:
Twp: Rge: Sec: Qtr: Lat: 36.367 Long: 81.134
Observers: Date: 6/26/2006

Banl~ull WIDTH (Wb~ 5.1 Feet
WIDTH of the stream channel, at banldull stage elevation, in a rime section.

Mean DEPTH (db~ 0.55 Feet
Mean DEPTH of the stream channel cross-section, at bankfull stage elevation, in a riffle section.
(dnx~Ata~e~

Bankfull Cross Section Area (Ab,~ 2.g Feetz
AREA of the stream channel cross-section, at bankfull stage elevation, in a rifle section.

WIDTH /DEPTH RATIO (Wb~ /db~ 9.27 Ft/Ft
13anldull WIDTH divided by banldull mean DEPTH, in a rifle section.

Mazimnm DEPTH (dm~ 0.9 Feet
Maximum depth of the bankfull channel cross-section, or elevation between the banldull stage and
thalweg in a riffie section.

Flood-Prone Area WIDTH (W~ 11.6 Feet
The stage%levation at which flood-prone area WIDTH is determined in a rifle section at twice
maximum DEPTH, or (2 x d~

Entrenchment RATIO (ER) 2.27 Ft/Ft
The ratio of flood-prone area WIDTH divided by bankfull channel WIDTH (W~,/Wb~ in a rifle
section.

Channel Materials (Particle Size Indez) D50 35.26 mm
The 50th percentile, or less than, from a pebble count frequency distribution of channel particles
representing the median or dominant particle size.

Water Surface SLOPE (S) 0.028 Ft/Ft
Average water surface slope as measured between the same position of bed features in the profile
over two meander wave lengths. This is similar to average bankfull slope.

Channel SINUOSITY (I~ 1.3
Sinuosity: an index of channel pattern, determined from stream length /valley length, i.e. (SL/VL);
or estimated from a ratio of valley slope divided by channel slope (VS/ S).
Stream T e
yp E 4b ~'~~ s~ ~ ~ ~~
Rosgen, 1996. Appked River Morp-wlogy.
© 2005 Wildland Hydrology

Reference Reach Summary Data Form
4
... and Reference Reach Summary Data
Mean Riffle Depth (db~ ~ O.SS;feet Mean Riffle Width (W~ = 5.11;feet Mean Riffle Area (A~ s 2.97;feeiz

~ Mean Pool Depth (dam„) 0.56;feet Mean Pool Width (W~) 6.44;feet Mean Pool Area (A~ _ 3.62;feetZ
o
c
a~
~ Ratio Mean Pool 1 ld~/
~ 1.018
Depth/Mean Riffle Depth ;dam Ratio Pool Width/Riftle 1 ; Wb~/
~ 1260
Width ~ ~ W~ Ratio Pool Area! ! lAb~,/
~ 1219
Riffle Area ~Ab~
..
m Max Riffle Depth (d~;~ 0.9;feet Max Pool Depth (dm~ ~ 0.9;feet Max riffle depth/Mean riffle depth; 1.636
c

U
Max pool depth/Mean riffle depth; 1.636 Point Bar Slope ~
Streamflow: Estimated Mean Velocity at Bankfull Stage (u~ ~ 41ft/s Estimation Method

Streamflow: Estimated Discharge at Bankfull Stage (Qb~ 112~cfs Drainage Area 0.1;~z

Geome Ave Min Max Dimensionless4 Geom~ Ratios Ave Min Max
~ ;Meander Length (Lm) ~ 45~ 35; SS~feet Meander Length Ratio (Lm/Wb~ ~ 8.806 6.84910.763
m _ _ >
~ Radius of Curvature (Rc) 16; I2; 20; feet Radius of Curvature/Riffle Width (Rc/VJ~ 3.131; 2.348; 3.914

Belt Width ~m~ 20; 16; 24;feet Meander Width Ratio (VJbh/Wb~ 3.914; 3 131; 4.697
,. _. t_~._ .. . , ..., _ ..
~ Individual Pool Length 1 0; 0; Olfeet Pool Length/Riffle Width 1 0.000: 0.0001 0.000
U , . ~ , _.~,.,, .,..:: _ ..:.. _. ~,.., .
Pool to Pool Spacing ~ 0 0 O feet Pool to Pool Spacing/Riftle Width O.oooc 0.000; 0.000

Valley Slope (VS) 0.0364 ;ft/ft Average Water Surface Slope (S) 0.028 ;ft/ft Sinuosity (VS/S) ~ I-3

Stream Length (SL)1 0 (feet Valley Length (VL) 1 0 Ifeet Sinuosity (SL/VL) . #####
..
Low Bank Height ~' ___ O;f~
(LBH) end` 0 feet Max Riffle start; O;feet
Depth ~ end 0 feet Bank Height Ratio ~; #;
(LBH/MaxRifIleDepth) end;
Facet Slo 'es Ave Min 'Max Dimensionless S '_lZatios Ave Min Max
Riffle Slope (S,;~ 4.0000;0.00000.0OOO~ft/ft Riffle Slope/Average Water Surface Slope (S~/S) 0.000; 0.000; 0.000;
_ _ :, ,. ,.
,~ Run Slope (S~ 0.00004.00000.0OOO;ft/ft Run SlopeJAverage Water Surface Slope (S,~/S) 0.000; 0.000; 0.000;;
~ ~ ~ .. . ,:..
n- pe (p
Pool Slo S) A.000OA.OOOOA.OOOO,ft/ft Pool SlopeJAverage Water Surface Slape (S
p/S) i O.000i O.000i 0.000
m
,;
~
~ Glide Slope (S~ ID.000OO.OOOOA.OOOO~ft/$ Glide Slope/Average Water Surface Slope (S~lS) 7 0.00or 0.000 0.000
U Future Mid, _ -int' Ave Min Max Dimensionless Ikpth Ratios ...Ave Min Max,..
~
0.900~ 0.9(Xl~fect Riffle M~k Depth/ILiflleMeanDepth (d,,,~,F/dh~) ~ i ~536~ 1 F36~ 1 636
Rif~leDepth(d~ ~ 0.900~
Y...
Run Depth (dm„~ ~ 0.000; 0.000; 0.000;feet Run Max Depth/Riffle Mean Depth (dm„m/d~ 0.000; 0.000; 0.000;:.

" Pool Depth (dmP) ; 0.900; 0.900; 0.900; feet Pool Max Depth/Riffle Mean Depth (dmr/d~ 1.636; I.636; 1.636,

Glide Depth (dmJ ; 0.000; 0.0(10, Ci.000lfeet Glide Max Depth/Riffle Mean Depth (d~/d~~ 0.000; 0.000; 0.000,

,•
~
~
~
~
~

~
CJ Catagories_ Reach - K_ ifl]e` Bai_ _ Indies Reiech~ Rif~le° 13ar
%Sllt/Clay' 15.84 0 4.77 ~~~,. l~lb 1.OR 12.71 I.65 ;0]m

%Sand 1.98 2.86 14.63 D35 16.47 33.08 7.94 ,mm
%Gravel 46.54 52.85 78.7 ~ D50 3526 SS.56 15.7 .mm
_,. _ _ .
Cobble 3564 44.29 1.9 ~ D84 11291 123.86 43 83 .mm
,~_
% Boulder 0 0 0 D95 162.37 170.26 60.45 ~rnm
"~ ~~ rr ..
~. ~ ~ ,
_
o
/o Bedrock 0 0 0 ~ ,'"
,.._ u
6
D100 2S6 68 ;mm

a The range of "feature" mid-point maximum bankfull depths, including the minimum, maximum and average values.
' ~ ~- (Pool depths are obtained from the deepest portion of the feature.)
b. A composite sample of materials from riffle and pool featutes taken within the designated reach.
c. Sample obtained within the "active" bed of a riffle featwe at the location of the cross section.
' ©2005 Wildland Hydrology

Trib. E4 Riffle
ELEV DEPTH AREA WET PER WIDTH HYD RAD MEAN D SLOPE ROUGH R/D84 VELOCITY U/U" U^2/2g DISCHARGE SHEAR POWER POWER/1N FROUDE TRANSPORT
(ft) (ft) (sq ft) (ft) (ft) (ft) (ft) (fUft) [f] (fps) (ft) (cfs) (psf) (Ib/s) (IblfVs) (Ib/s)
1169.09 0.1 0.08 1.54 1.53 0.05 0.05 0.028 2.45059 0.12 0.38 1.81 0 0.03 0.09 0.05 0.04 0.3 0
1169.19 0.2 0.26 2.37 2.32 0.12 0.12 0.026 146.7188 0.29 0.08 0.23 0 0.02 0.21 0.04 0.02 0.04 0
1169.29 0.3 0.53 2.75 2.63 0.19 0.2 0.028 3.94076 0.47 0.59 1.42 0.01 0.31 0.33 0.55 0.21 0.23 0
1189.39 0.4 0.81 3.21 3.04 0.25 0.27 0.028 1.70927 0.61 1.03 2.16 0.02 0.83 0.44 1.45 0.48 0.35 0
1169.49 0.5 1.14 3.73 3.49 0.31 0.33 0.028 1.11287 0.76 1.42 2.68 0.03 1.62 0.54 2.82 0.81 0.43 0
1169.59 0.6 1.51 4.21 3.91 0.36 0.39 0.028 0.82718 0.88 1.77 3.11 0.05 2.68 0.63 4.87 1.2 0.5 1.4
1169.69 0.7 1.92 4.68 4.32 0.41 0.45 0.028 0.66234 1.01 2.11 3.48 0.07 4.06 0.72 7.09 1.64 0.56 0
1169.79 0.8 2.37 5.12 4.67 0.46 0.51 0.028 0.55575 1.13 2.44 3.79 0.09 5.79 0.8 10.12 2.17 0.8 0
1169.89 0.9 2.86 5.56 5.01 0.51 0.57 0.028 0.4814 1.25 2.76 4.08 0.12 7.91 0.89 13.61 2.76 0.65 0
1169.99 1 3.53 8.5 7.93 0.42 0.45 0.028 0.56747 1.03 2.31 3.75 0.08 8.16 0.73 14.25 1.8 0.81 ~ 0
1170.09 1.1 4.39 9.78 9.19 0.45 0:48 0.028 0.51542 1.11 2.51 3.94 0.1 11.02 0.79 19.25 2.09 0.84 0
1170.19 1.2 5.37 11.04 10.43 0.49 0.52 0.028 0.46588 1.2 2.75 4.14 0.12 14.79 0.88 25.85 2.48 0.67 0
1170.29 1.3 6.5 12.72 12.04 0,51 0.54 0,028 0.43836 1.25 2.8 4.27 0.13 18.83 0.89 32.9 2.73 0.89 0
1170.39 1.4 7.78 14.41 13.62 0.54 0.57 0.028 0.40803 1.33 3.09 4.42 0.15 24.01 0.94 41.95 3.08 0.72 0
1170.49 1.5 9.21 15.77 14.88 0.58 0.82 0.028 0.37475 1.43 3.34 4.62 0.17 30.77 1.01 53.76 3.61 0.75 7.22
1170.59 1.6 10.76 17.01 16.02 0.63 0.67 0.028 0.34671 1.55 3.62 4.8 0.2 38.95 1.1 68.06 4.25 0.78 12.88
1170.69 1.7 12.4 17.94 18.84 0.69 0.74 0.028 0.31733 1.7 3.96 5.02 0.24 49.11 1.21 85.8 5.09 0.81 22.1
1170.79 1.8 14.12 18.86 17.65 0.75 0.8 0.028 0.29596 1.84 4.28 5.2 0.28 80.37 1.31 105.47 5.98 0.84 34.64
1170.89 1.9 15.92 19.69 18.38 0.81 0.87 0.028 0.27588 1.99 4.6 5.38 0.33 73.26 1.42 128 6.86 0.87 50.62
1170.98 2 17.8 20.52 18.1 0.87 0.93 0.028 0.26073 2.14 4.91 5.54 0.37 87.32 1.52 152.57 7.99 0.9 70.38
_i
_- ~..--

u

1

F
ENTRAINMENT CALCULATION FORM
. - ~ _...
Stream: ;T1~1 ~ ~ ~ ~' Reach: ~-
_.. .
Team: ~ F x Date: ~.
p C`F~ _ /k w ~.1/~
Information Input Area
Dso Riffle bed material D50 (mm)

~ D~50 Bar sample D50 (mm)
~~ D; Largest particle from bar sample (mm) 0.22 (feet)
304.8 mm/foot
Se Existing bankfull water surface slope (ft/ft)
de Existing bankfull mean depth (ft)
R H draulic Radius of Riffle Cross Section (ft)
1.65 ys Submerged specific weight of sediment

Calculation of Critical Dimensionless Shear Stress
2.55 D50/D~50 If value is between 3-7 Equation 1 will be used: T~G = 0.0834(D50/D~SO)-0.$'z
1.70 D;/D50 If value is between 1.3-3.0 Equation 2 will be used: T~G = 0.0384(D;/Dso)"o.as~
0.0240 T*a Critical Dimensionless Shear Stress Equation used: 2

Calculation of Bankf ull Mean Depth Required for Entrainment of Largest Particle in Bar Sample

0.32 d~
Required bankfull mean depth (ft) d~ = T=~; SD;
Se

0.55 de Existing bankfull mean depth (ft)

Calculati on of BKF Water Surface Slope Required for Entrainment of Largest Particle in Bar Sample

0.0161 S~ Required bankfull water surface slope (ft) S~ = T~~;- SD;
de

0.0280 Se Existing bankfull water surface slope (ft)

Sediment Transport Validation
0.87 Bankfull Shear Stress T~ =yRS (Ib/ft2) y =Specific Weight of water = 62.4 Ibs/ft3

150 Moveable particle size (mm) at bankfull shear stress (predicted by the Revised Shields Diagram by
Ros en, 2006

0.35 Predicted shear stress required to initiate movement of D; (mm) (see Revised Shields Diagram,
Ros en, 2006
Note: If available bankfull shear stress exceeds D~~ of bed, degradation potential exists.

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Velocity computation form(Snow Creek Trib)
- ~"elocity Computation Form

,.
Generated: 9/18!2006 9:38 PM
Stream Name: TRIB. To SNOW CREEK (C. L. WHITE PROPERT
Stream Locafion: SURRY COiJNTY, NC
Station: 0+11 (ITSE FOR REACH)
SLOPE FOR STREAM REACH = 2.8%
Date: 8/1/2006
In ut Variables Ou ut Varia bles
Cross-section area (Abp 2.9 ft Mean Depth (dh~ 0.57 ft
Width (Why 5:1 ft Wetted Perimeter (WP) 6.24 ft
D84 (Riffle 134 mm D84 0.44 ft
Slope (Shy 0.028 ft/ft Hydraulic Radius (R) 0.50 ft
Gravitational Acceleration (g) 32.2 ft/s2 R/D84 1.14 ft/ft
R/D84, u/u*, Mannin s n
u/U* = 6 ft/S/ft/S Using R/D84; Reference Reach Field Book, p.188; River Field Book, p.233
Mamm~ ~S n = 0.039. (Reference Reach Field Book, p.189; River Field Book, p.236)
Veloci = 4.0 ft/S FromManning'sequationu~1.49R'~Sln)/n
u/u*=2.83+5.710 84

Velocity = 2.1 ft/s n=n4[z.83+5.71og(R/D84)]
Jarrett's E uation for estimatin Mannin 's n
n = 0.1 n=0.39So3sR-0.is
VelOCl = 1.4 ft/S From Manning's equation u=(1.49Rv'S~n~n
Mannin 's n b Stream T e (for lar a rivers)
Stream T e C4
Mamm~ ~S n = O.035 Reference Reach Field Book, p.187; River Field Book, p.237
Velocity = 4.5 ftIS From Manning's equation u~1.49R~S~~~n
Validate veloci calculations usin the Continui E uation
Drama e Area (mil) 0.1. Ga a Station Re 'oval Curve
Discharge (Qb~ cfs 11 cfs
Veloci (u = /A) ft/s 3.8 ft/s

0

TRIBUTARY TO SNOW CREEK (C. L. WHITE PROPERTY)
SURRY COUNTY, NC
ENTRAINMENT DESIGN:
GIVEN: The calculated bank full shear stress is .871bs/ftz
The predicted moveable particle size for .871bs/ftz is i SOmm.
Reference the Revised Shields Diagram by Rosgen 2006. (red, Reference Reach Field
Book page 190)
The 150mm particle is approximately the D90 of the stream riffle pebble count.
The size particle that would be moved using the critical dimensionless shear stress
number obtained from the Entrainment Calculation Form with the design bankfull mean
depth (0.55') is 125mm.
dr = ('L ~ci) x (~s) x(Di) _ (Se)
dr =required bankfull mean depth = 0.55'
'C'~ci = Critical Dimensionless Shear Stres = 0.024
ys =1.65 = Sumerged Specific Weight of Sediment
Di = Largest Particle To Be Moved = 125mm (0.41')
se Existing bankfull water surface slope (ft./ft.) = 0.028
' The D84 from both the overall classification pebble count and the wet riffle pebble count
are only slightly less than 125mm
(113mm and 124mm)
.
' Therefore, based on the existing shear stress and the existing particle sizes in this stream
degradation potential does not exist. Also the existing shear stress is adequate to prevent
aggradation m the stream bed.

By: T. B. 7/26/06

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~,

n
EFH-2 ESTIMATING RUNOFF AND PEAK DISCHARGE Version 1.1.0
Client: C. L. WHITE
County: SURRY State: NC
Practice: STREAM CROSSING CULVERT
Calculated By: JTB Date: 9/18/2006
Checked By: Date:
Drainage Area: 66 Acres (provided from RCN Calculator)
Curve Number: 63 (provided from RCN Calculator)
Watershed Length: 1900 Feet
Watershed Slope: 12 Percent
Time of Concentration: 0.41 Hours (calculated value)
Rainfall Type: II
Storm Number 1 2 3 4 5 6 7
Frequency (yrs) 1 2 5 10 25 50 100
24-Hr rainfall (in) 3.00 3.50 4.30 5.00 5.50 6.10 7.00
la/P Ratio 0.39 0.34 0.27 0.23 0.21 0.19 0.17
Used 0.39 0.34 0.27 0.23 0.21 0.19 0.17
Runoff (in) Q.43 0.66 1.09 1.51 1.83 2.25 2.90
(ac-ft) 2.37 3.63 6.00 8.31 10.07 12.38 15.95
Unit Peak Discharge 0.619 0.710 0.784 0.812 0.828 0.844 0.863
(cfs/acre/in)
Peak Discharge (cfs) 18 31 56 81 100 125 165
Page 1 of 2

' EFH-2 ESTIMATING RUNOFF AND PEAK DISCHARGE Version 1.1.0
Curve number Computation
Client: C. L. WHITE
County: SURRY State: NC
Practice: STREAM CROSSING CULVERT
Calculated By: JTB Date: 9/18/2006
' Checked By: Date:

11

Acres CN
COVER DESCRIPTION Hydrologic Soil Group

A B C D
CULTIVATED AGRICULTURAL LANDS
Row crops C + Crop residue good - 20(74) - -
OTHERAGRICULTURAL LANDS
Pasture, grassland or range good - 26(61) - -
Woods good - 20(55) - -
Total Area (by Hydrologic Soil Group) 66
TOTAL DRAINAGE AREA: 66 Acres WEIGHTED CURVE NUMBER: 63
' Page 2 of 2

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Orifice Flow Formula Solution
Participant: C. L. WHITE
Location: SURRY COUNTY
County: County, NORTH CAROLINA
Designer: JTB Checker:
Date: 09/18/2006 Date:
Hydraulics Formula, Version 2.2.1
TRIB. SNOW CREEK CULVERT
Orifice Coefficient (C): 0.6
Diameter of Orifice: 24 in.
Head on Orifice: 2 ft.
Orifice Capacity: 21.38 cfs

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f
Pipe Flow Formula Solution
Participant: C. L. WHITE
Location: SURRY COUNTY
County: County, NORTH CAROLINA
Designer: JTB Checker:
Date: 09/18/2006 Date:
Hydraulics Formula, Version 2.2.1
TRIB. SNOW CREEK CULVERT
Mannings Coefficient (n): 0.025
Entrance Coefficient (Ke): 0.65
Diameter of Pipe: 24 in.
Head on Pipe: 3 ft.
Length of Pipe: 20 ft.
Pipe Capacity: 27.2 cfs
Pipe Velocity: 8.7 ft/sec
Friction Coefficient (Kp): 0.0459
Max allocable fall in pipe when
outlet is not submerged: 1.1 ft.

~ REFERENCE REACH - E4

ii

Strearv>s Cla~~ificati~ln ~®rm

i

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L

r

Stream Channel Classification (Level II) ...
Stream NAME: UZ. NEADOW FORK..CREEK=REACH 2
Basin NAME: New River Drainage AREA: 832 acre 1.3 miZ
Location: Alleghany County, NC
Twp: Rge: ~ Sec: Qtr: Lat: 36.4006 Long: 81.206
Observers: Team 2 (Leve12 - 2006) Date: 3/22/2006

Banlzfull WIDTH ~nkr) 10.31 Feet
WIDTH of the stream channel, at bankfull stage elevation, in a riffle section.

Mean DEPTH (db~) 1.45 Feet
/Mean AADEPTH of the stream channel cross-section, at bankfull stage elevation, in a riflle section.
\d6kf^"bki/Wbkf)
,.:. _ _ _
13ankfull Cross Section Area (Ankr) 14.98 Feet2
AREA of the stream channel cross-section, at bankfull stage elevation, in a riffle section.

WIDTH /DEPTH RATIO (Wnkr /db~) 7.11 Ft/Ft
Bankfull WIDTH divided by bankfull mean DEPTH, in a riffle section.

- MaXlmum DEPTI3 (dmrif) 1.92 Feet
Maximum depth of the bankfull channel cross-section, or elevation between the bankfull stage and
thalweg in a riffle section.

Flood-Prone Area WIDTH (WfP~ 292 Feet
The stage/elevation at which flood-prone area WIDTH is determined in a riffle section at twice
maximum DEPTH, or (2 x dmcif)

Entrenchment RATIO (ER) 28.32 FUFt
The ratio of flood-prone area WIDTH divided by bankfull channel WIDTH (W~a/Wbkf) in a riffle
section.

Channel Materials (Particle Siae Index) D50 16 mm
The 50th percentile, or less than, from a pebble count frequency distribution of channel particles
representing the median or dominant particle size.

Water Surface SLOPE (S) 0.0057 FUFt
Average water surface slope as measured between the same position of bed features in the profile
over two meander wave lengths. This is similar to average bankfull slope.

Channel SINUOSITY ~ 1.7
Sinuosity: an index of channel pattern, determined from stream length /valley length, i.e. (SL/VL);
y p y 1 slope (VS/ S).
or estimated from a ratio of vane slo a divided b channe

Stream Type
E 4 For Reference, see page 5-5, 5-6:
Rosgen, 1996. Applied RiverMorphofogy.
© 2005 Wildland Hydrology

ii

1
Reference Reach Summary Data Form
... and Reference Reach Summary Data
.,,
Mean Riffle Depth (dam 1.45 {feet Mean Riffle Width (Wn~ :10.31; feet Mean Riffle Area (A~ 14.98;feet~
,, _ , ..
~ Mean Pool Depth (db~,) 1.72;feet Mean Pool Width (Wb~) 10.6;fcet Mean Pool Area (A~) ; 18.22;feetz `
o

~ ' :,.. ,,,
Ratio Mean Pool ~ 1.1861~~ Ratio Pool Width/Riffle ~ 10281Wb>~
Depth/Mean Riffle Depth ~ .~xr Width ~ ;W~
Ratio Pool Area/
Riffle Area >.... , .
12161A6~
;Abp

m Maas Riflle Depth (dm,;~ 1.92;feet Max Pool Depth (d,,,F,~ 2.75;feet Max riffle depth/Mean riffle depth; 1 324
~ ::
~ Max pool depth/Mean riffle depth; 1.89? Point Bar Slope 0.15
~
,.
_. _:
U Streamflow: Estimated Mean Velocity at Bair}: t ul I Stage (ub~ 1 4.261 ft/s Estimation Method IMannings n by Stream

Streamflow: Estimated Discharge at Bankfull Stage (Q~ ~ 63.811cfs Drainage Area 1 3;mi2

Geome Ave Min Max llimcnsioniessGeometrvRatios Ave Min Max
~ Meander Length (Lm) 8, ~ 571 lO8~feet Meander Length Ratio (Lm/W~
' ' ' ~ 8.050 5.52y~ 10.475
i
~ Radius of Curvature (Rc) 22; 18; 26;feet Radius of CurvatumJRiffle Width (RcJWy~ 2.134; L746; 2.522 ,
o -; ~ ...__ ..... .......: .., _
_
d 69,feet
Belt Width ~b~r) 51; 32; 1 Meander
Width Ratio (Wbu/Wb~ :4.947; 3.104; 6.693
c ,
_,
c
t Individual Pool Length 1 17.891 12.931 26.03 ~ feet Pool Length/Rilile Width 1 1.7351 12541 2.525

Pool to Pool Spacing ~ 37.44 24.08 70.84~feet Pool to Pool Spacing~Riflle Width ~ 3.631 ~ 2 336 6 871 :.

Valley Slope (VS) 1 0.0097 Ift/ft Average Water Surface Slope (S) 0.0057 1fl/ft Sinuosity (VS/S) 1.7
_.. ...
Stream Length (SL)1 212 (feet Valley Length (VL) ~ 122 (feet Sinuosity (SL/VL) 1 1.738

Low Bank Height start; 1.62~feet
(L,BH) end: 2.69~feet MaxRifIIe starts 1.6~feet
Depth end. 2.88~feet Bank Height Ratio start; 1.013
(LBH/MaxRiffleDepth) ends
Facet.Slo e§ Ave Min Ma_~c Dimensiouks.4 Slo Ratios Ave Min Max
Riffle Slope (5,;~ -0.02360.0166-0.0336~ft/ft Riffle Slope/Average Water SurfacK Slope; (5,;~/S) ~ 4.135 2.914 5.893;

o Run Slope (Sr„~ ;0.0369b_0308b.0406;ft/ft Run Slope/Average Water Surface Slope (S„m/S) 6.465; 5 400; 7.125;

~- :Pool Slope (SP) 10.0038~.000510.00801ft1ft Pool Slope/Average Water Surface Slope (Sp/S) 10.6671 0.0881 1395.

c
~
m
Glide Sk,pe (S~1 X~ ~~iti2~i frf~17X10087 ft'(l
Glide Sli~pUAvcrace VG'ater Surface Slrrpe (S~/S}
~ 1.O8R1 o.R191 1.5261'
t
U ,.
Feature Mid 'oint' Ave h1in Max Uimensianless Depth Ratios
Ave Min Max
Riflle Depth (dam ~ 1.9201 1.7701 2.1501 feet Rifle Max Depth/I(i$le Mean Depth (d,~dbE~
1 13241 12211 1.4831
,.:_ 1..., ~. ,
Run Depth (dam ; 2270; 2.150; 2.46o~feet Run Max Depth/Riffie Mean Depth (dm„m/d~
,. .:
,
,
,
~,
s
r 1.566; 1.483 ~ 1 697;
,
...._
.~ _ ... .
,.
.
. ....
, .
__.. ~ ~:.;~ , ,.. ,te
,,..
Pool Depth (dam) ; 2.750; 2.500; 3.130;feet Pool Max Depth/Rtffie Mean Depth (d~/d~
..
,
~
~, ~ ; 1.897; 1.724; 2 159;
_
...
,....
__.....
.,. ...
_ ._x
G1ideD~pth(dn,~,) ; 2.110; t_sa~; 2R~ulfeet Glide MaxDepth/RiffleMeanDepth(d,~/d~ 1 1.455; 12x1; 19931%

~
to
...

~
~

V Cat~ori~s Reache .- Riflle` Bar Indices Rcache . Riffle`-
%SilbClay 0 ~ U 0 D16 4.42 l6
::..

Sand 13 0 15.57 1 ll35 12.08 2439
,. .:.:
' %Gravel 82 92 8L66 ~ ll50 16 31.1
%Cobble 5 8 2.77 DR4 35.9 55.56
% Boulder ~ 0 0 ~ D95 64 79.6
%Bedrock 0 0 0 D100 180 t28 Bar
207 ;tutu

621 Imm

11.34 1mm
34.39 ~rnm
59.1 ~mm
70 ;mm
a The range of "feature" mid-point maximum banldull depths, including the minimum, maximum and average values.
' (Pool depths are obtained from the deepest portion of the feature.)
b. A composite sample of materials from riffle and pool featutes taken within the designated reach.
c. Sample obtained within the "active" bed of a riffie feature at the location of the cross section.
' ©2005 Wildland Hydrology

~ EXISTING CHANNEL E4b

r

11
.-
C
O
tC
7
N
W
11
11
11
Horizontal Distance (ft)
~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~"J' ~ ~
Pool - 0+77 (Existing - Trib)
O Ground Points • Bankfull Indicators 1 Water Surface Points
Wbkf = 6.4 Dbkf .6 Abkf = 3.6

11

C
O
c0
N
W
11
11
11
Horizontal Distance (ft)

Riffle - 0+11 (Existing - Trib)
O Ground Points • Bankfull Indicators • Water Surface Points
Wbkf 5.1 Dbkf = .5 Abkf = 2.8

DESIGN B3a

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MORPHOLOGICAL CHARACTERISTICS OF THE EXISTING AND PROPOSED
CHANNEL WITH REFERENCE REACH DATA
(After Rosgen, 1996)
Restoration Site: Emergency Spillway, C.L. White Pond, Surry County
Reference Reach (Name of stream ~ location): Goshen Creek (7.5 sq. mi.), Watauga County
VARIABLES EXISTING PROPOSED PROPOSED REFERENCE
CHANNEL REACH REACH REACH
(Existing Watershed) (100 c£s IIow)
1. Stream type G4 B3a B3a B3a/1
2. Drainage area 0.05 0.05 0.05 1.5
sq. mi.
3. Bankfull width Mean: Mean: 5 Mean: 20 Mean: 24
(wbkf) - ft.
Range: Range: Range: Range:
4. Bankfull mean Mean: Mean: 0.4 Mean: 1.4 Mean: 1.1
depth (db,~) - ft.
Range: Range: Range: Range:
5. Width/depth Mean: Mean: 12.5 Mean: 14.3 Mean: 22
ratio (wb,~/db~)
Range: Range: Range: Range:
6. Bankfull cross- Mean: Mean: 2.0 Mean: 28 Mean: 27
sectional area Range:
Abp - s . ft. Range: Range: Range:
7. Bankfull mean Mean: Mean: 3.0 Mean: 3.6 Mean: 3.0
velocity (vb,~) - f/s
Range: Ran e: Ran e: Ran e:
8. Bankfull discharge, 6 6 100 80
CfS Qb~
9. Bankfull Mean: Mean: 0.5 Mean:2 Mean: 1.6
Maximum depth
dm _ ft Range: Range: Range: Range:
10. Max d~ff/db,~ ratio Mean: Mean: 1.25 Mean: 1.45 Mean: 1.45
Ran e: Ran e: Ran e: 1.4 -1.5 Ran e:
11. Riffle Length (L,;ff) Mean: Mean: Mean: Mean:
_ ft. Range: Range: Range: Range:
12. Ratio riffle length Mean: Mean: Mean: Mean:
to bkf width Range: Range: Range: Range:
Lriff ~bkf
13. Low bank height Mean: Mean: 1.0 Mean: 1.0 Mean: 1.0
to max. d~ ratio Range: Range: Range: Range:
14. Width of Mean: Mean: Mean: 30 Mean: 38
flood prone area
w a _ ft Range: Range: Range: 28 - 36 Range:
15. Entrenchment Mean: Mean: Mean: 1.5 Mean: 1.6
ratio (w~,a/wbkf) Range: Range: Range:1.4 -1.8 Range:
Page 1 of 5
09/18/06

~.
VARIABLES EXISTING PROPOSED PROPOSED REFERENCE
CHANNEL REACH REACH REACH
16. Meander length Mean: Mean: Mean: Mean:
(gym) _ ft. Range: Range: Range: Range:
17. Ratio of Mean: Mean: Mean: Mean:
meander length
to bankfull Range: Range: Range: Range:
width Lm/wb,~
18. Radius of Mean: Mean: Mean: Mean:
curvature (R~) -
ft Range: Range: Range: Range:
19. Ratio of radius Mean: Mean: Mean: Mean:
of curvature to
kfull width
an
b Range: Range: Range: Range:
p
~
~ ~d wbkf
20. Belt width (wb,~ Mean: Mean: Mean: Mean:
- ft.
Range: Range: Range: Range:
21. Meander width Mean: Mean: Mean: Mean:
ratio (wb,~/wb,~) Range:
Range: Range: Range:
22. Sinuosity = k 1.1 1.1 1.1 1.1
(Stream Length,nal~
valle distance
23. Valtey slope 0.066 0.066 0.066 0.066
ft/ft
24. Average water 0.06 0.06 0.06 0.06
surface slope-ft/ft
Sav = Swalle k
25. Pool slope Mean: Mean: 0.0009 Mean: 0.0009 Mean: 0.0096
(sue,) - ft/ft
Range: Range: 0.0006 - Range: 0.0006 - Range: 0.0043 -
0.0012 0.0012 0.0124
26. Ratio of pool Mean: Mean: 0.16 Mean: 0.16 Mean: 0.16
slope to
average slope Range: Range: 0.07 - 0.2 Range: 0.07 - 0.2 Range: 0.07 - 0.2
S I~Sbkf
27. Maximum Mean: Mean: Mean: 5.5 Mean: 4.3
pool depth
d maX of _ ft Range: Range: Range: 4.1 - 8.1 Range: 3.2 - 6.4
28. Ratio of pool Mean: Mean: Mean: 3.9 Mean: 3.9
depth to
average Range: Range: Range: 2.9 - 5.8 Range: 2.9 - 5.8
bankfull depth
dmax I~dbkf
29. Pool width Mean: Mean: Mean: 26 Mean: 30.8
w I _ ft. Range: Range: Range: Range:
30. Ratio of pool Mean: Mean: Mean: 1.3 Mean: 1.3
width to
bankfull width Range: Range: Range: Range:
(wpool~wbkf)
Page 2 of 5 09/18/06

VARIABLES EXISTING PROPOSED PROPOSED REFERENCE
CHANNEL REACH REACH REACH
31. Pool Area - sq ft Mean: Mean: Mean: 45 Mean: 44
A i Range: Range: Range: 36 - 53 Range: 34.5 - 52.2
32. Ratio of Pool Mean: Mean: Mean: 1.6 Mean: 1.6
Area to Bankfull
Area Any
Range:
Range:
Range: 1.3 -1.9
Range: 1.3 -1.9
33. Pool to pool Mean: Mean: Mean: 32 Mean: 38
spacing (p-p) -
ft Range: Range: Range: 8 - 60 Range: 9.3 - 70.8
34. Ratio of p-p Mean: Mean: Mean: 1.6 Mean: 1.6
spacing to
bankfull width Range: Range: Range: 0.4 - 3.0 Range: 0.4 - 3.0
- /NVbkf)
35. Pool length (L~,) Mean: Mean: Mean: 12 Mean: 15.4
_ ft. Range: Range: Range: 4 - 22 Range: 5.6 - 26.3
36. Ratio of Pool Mean: Mean: Mean: 0.6 Mean: 0.6
length to
bankfull width Range: Range: Range: 0.2 -1.1 Range: 0.2 -1.1
I- ~/bkt
37. Avg. riffle slope Mean: Mean: Mean: 0.11 Mean: 0.11
gaff _ ft./ft, Range: Range: Range: 0.08 - 0.13 Range: 0.08 - 0.13
38. Ratio of riffle Mean: Mean: Mean: 1.8 Mean: 1.8
slope to avg.
slo a s,;~/sa„ Range: Range: Range: 1.5 - 2.2 Range: 1.5 - 2.2
39. Avg. run slope Mean: Mean: Mean: 0.15 Mean: 0.15
ft/ff Range: Range: Range: 0.03 - 0.24 Range: 0.03 - 0.24
40. Ratio of run Mean: Mean: Mean: 1.6 Mean: 1.6
slope to avg
slo a s~,~/sa„ Range: Range: Range: 0.6 - 2.4 Range: 0.6 - 2.4
41. Avg. glide slope Mean: Mean: Mean: 0.019 Mean: 0.019
ft/ft Range: Range: Range: 0.009 - Range: 0.009 -
0.026 0.026
42. Ratio of glide Mean: Mean: Mean: 0.3 Mean: 0.3
slope to avg
sloes ,;de/sa Range: Range: Range: 0.14 - 0.43 Range: 0.14 - 0.43
43. Max run depth Mean: Mean: Mean: 3.9 Mean: 3.1
dmax N~ _ {{, Range: Range: Range: 3.4 - 4.3 Range: 2.6 - 3.5
44. Ratio of max. run Mean: Mean: Mean: 2.8 Mean: 2.8
depth to mean bkf
de th dm~ N~/d~f Range: Range: Range: 2.4 - 3.1 Range: 2.4 - 3.1
45. Run width (wti~) Mean:. Mean: Mean: 20 Mean: 24
_ ft. Range: Range: Range: Range:
46. Run width to Mean: Mean: Mean: 1.0 Mean: 1.0
bankfull width Range: Range: Range: Range:
ratio wti~/wb,~
47. Mean run depth Mean: Mean: Mean: Mean:
d~,~ ft. Range: Range: Range: Range:
48. Run w/d ratio Mean: Mean: Mean: Mean:
w~,,,/dN~) Range: Range: Range: Range:
49. Ratio of run w/d Mean: Mean: Mean: Mean:
to riffle w/d Range: Range: Range: Range:
' Page 3 of 5 09/18/06

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i

VARIABLES EXISTING PROPOSED PROPOSED REFERENCE
CHANNEL REACH REACH REACH
50. Run length (L~,~) Mean: Mean: Mean: Mean:
_ ft. Range: Range: Range: Range:
51. Ratio of run Mean: Mean: Mean: Mean:
length to bankfull Range: Range: Range: Range:
width L~,~lwb,~
52. Max. glide depth Mean: Mean: Mean: 3.8 Mean: 2.7
dmax iide - ft• Range: Range: Range: 3.4 - 4.1 Range: 2.4 - 2.9
53. Ratio of max. Mean: Mean: Mean: 2.5 Mean: 2.5
glide depth to
mean bkf depth Range: Range: Range: 2.3 - 2.8 Range: 2.3 - 2.8
dmax lide/dbkf
54. Glide width Mean: Mean: Mean: 20 Mean: 24
w ride _ ft. Range: Range: Range: Range:
55. Ratio of glide Mean: Mean: Mean: 1.0 Mean: 1.0
width to bankfull Range: Range: Range: Range:
Width W lide/Wbkf
56. Glide mean Mean: Mean: Mean: Mean:
de th d i;de - ft. Range: Range: Range: Range:
57. Glide w/d ratio Mean: Mean: Mean: Mean:
W lide/d tide Range: Range: Range: Range:
58. Ratio of glide w/d Mean: Mean: Mean: Mean:
to riffle w/d Range: Range: Range: Range:
59. Glide length Mean: Mean: Mean: Mean:
ride - ft• Range: Range: Range: Range:
60. Ratio of glide Mean: Mean: Mean: Mean:
length to bankfull
width lide/Wbkf Range: Range: Range: Range:
MATERIALS:
1. Particle Size
Distribution of
Channel Material
mm
D 16 3.6
D 35 20.7
D 50 69.2
D 84 972.8
D 95 Bedrock
Remarks: The values calculated and shown on these pages are for the B3a section that will
serve as a channel for a very small watershed and in addition the out flow from the emergency
spillway. The proposed channel will have a low flow channel to facilitate normal and bankfull
flows. A channel typical to manage a 100 cfs flow and the floodprone area of this channel will
carry the 25 year runoff event estimated at 600 cfs. Discharge estimations were calculated using
an assumed Mannings "n" value. '
' Page 4 of 5 09/18/06

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VARIABLES EXISTING PROPOSED PROPOSED REFERENCE
CHANNEL REACH REACH REACH
MATERIALS:
2. Particle Size
Distribution of
Riffle Bed
Material mm
~ ~s
35
~ 50
D~
95
3. Particle Size
Distribution of
Bar Material mm EXISTING
CHANNEL PROPOSED
REACH REFERENCE
REACH
~ ~s
~ 35
~ 50
D~
~ 95
Largest size particle
at the toe (lower third)
of bar mm
SEDIMENT TRANSPORT VALIDATION
(BASED ON BANKFULL SHEAR STRESS)
Existin Condition
Pro osed Condition
Bankfull shear stress -Calculated value (Ib/ft )
Critical shear stress -Value from Shields Diagram(Ib/ )
OR Grain Diameter from Shields Diagram (mm)
Relation ad~usted to include field data
Critical dimensionless shear stress
Minimum mean db~ calculated using critical
dimensionless shear stress a uations
Manning's "nn

These values and ratios were calculated and proposed by:
Name: Alan Walker
. Stream Walker Consulting Date: August, 2006
Page 5 of 5
09/18/06

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$~P@x'1111 C~SSSifiCSti011 ~®Pf1'1
Stream Channel Classification (Level II) ...
Stream NAME: Emergency Spillway, Reach -Reach i
Basin NAME: Drainage AREA: 32 acre 0.05 mil
Location:
Twp: Rge: Sec: Qtr: Lat: 0 Long: 0
Observers: Date: 8/22/2006

Dankfull WIDTH (Wb~ 20.01 Feet
WIDTH of the stream channel, at. banldult stage elevation, in a riffle section.

Mean DEPTH (dn~) 1.39 Feet
Mean ~DEPrtT~H of the stream channel cross-section, az banldnll stage elevation, in a riffie section.
(dbkf~"6kP ' • bld)

Bankfull Cross Section Area (Abp 2'I.t35 Feet2
AREA of the stream channel cross-section, at bankfutl stage elevation, in a riffle section.

WIDTH /DEPTH RATIO ~'t,kr/db~ 24.4 FUFt
Barrkfirll WIDTH divided by bankfirll mean DEPTH, in ariffle-section:

1Vlazimum DEPTH (dr,~ 1:98 Feet
Maximum depth of the bani£full channel cross-section, or elevation between the bankfirll stage and
thalweg.in a riffle section.

Flood-Prone Area WIDTH (Wrp>J 43.03 Feet
"The stage7elevation at which flood-prone area WIDTH is determined in a rile section at twice
maximum DEPTH, or (2 x d,~;~

Entrenchment RATIO (ER) :2.15 FUFt
The ratio of flood prone area WIDTH divided by banldull channel WIDTH (W ~/Wb~ in a riffle
section.

Channel Materials (Particle' Size Index) D50 65 mm
The SOth .percentile, or less than, from a pebble couut frequency distribution of channel .particles
representing the median or dominant particle size.

Water Surface SLOPE (S) 0.06 Ft/Ft
Average water surface slope as measured between the same position of bed features in the profile
over two meander wave lengths. This is similar to average banlfirll slope.

Channel SINi10SIT1:' (K) 1
Sinuosity: an index of channel pattern, determined from stream length /valley length, i.e. (SL/VL);
or estimated from a ratio of valley slope divided by channel slope (VS/ S).
~~`rE8/i7 T ~ -
yp B 3A For Reference, see page 5.5, 5.6:
Rosgen, ?996. Applied River Morphology.
® 2005 Wildland Hydrology

Velocity computation form(Snow Creek ESW)
Velocity Computation Form
Stream Name: SNOW CREEK C. L. WHITE FARM)
Stream Location: SURRY COUNTY, NC
Station: ESW OUTLET ALL ROCK STRUCTURES BETWEEN 1+75 - 2+00
FLOW DEPTH = 2.2' SHEAR STRESS = yRS = 62.4 x .9 x .15 = 8.4 Ib/ftz
Date: 7/6/2006 (50 ear storm ESW Q out flow = 600cfs from Dams2 routin )
In ut Variables Ou ut Varia bles
Cross-section area (Ah~) 60 ft Mean Depth (db~) 0.94 ft
Width (Why 64 ft Wetted Perimeter (WP) 66.00 ft
D84 (Riffle 175 mm D84 0.57 ft
Slope (Shy 0.15 ft/ft Hydraulic Radius (R) 0.90 ft
Gravitational Acceleration (g) 32.2 ft/s2 R/D84 1.57 ft/ft
R/D84, u/ux, Mannin s n
u/U* = 7 ft/S/ft/S Using R/DS4; Reference Reach Field Book, p.188; River Field Book, p.233
Manriin 's n = 0.034 (Reference Reach Field Book, p.189; River Field Book, p236)
Velocity = 15.8 ft/s From Manning's equation u=(1.49R73S'n)/n
u/u*=2.83+5.710 (R/D84
U* = 2.1 ft/S u*=(gRS)o.s
VelOCl = 8.2 ft/s u~*[2.83+5.71og(R/D84)J
Jarrett's E uation for estimatin Mannin 's n
n = 0.2 n= 039Sa.ssR-o.~s
VelOClty = 2.8 ft/S From Manning's equation u=(1.49R73S''n)/n
Mannin 's n b Stream T e (for lar a rivers)
Stream T e B4/a
Manriin 's n = 0.056 Reference Reach Field Book, p.187; River Field Book, p.237
Veloei = 9.6 ftJS From Manning's equation u=(1 49RzoS'n)/n
Validate veloci calculations usin the Continuity E uation
Drainage Area (mil) 2.1 Gage Station ESW Q) OUT
Discharge (Qb~ cfs 560 cfs
Velocity (u = Q/A) ft/s 9.3 ft/s
Generated: 9/14/2006 10:18 PM

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Copy of Velocity computation form(Snow Creek (560cfs) ESW)
Velocity Computation Form
Stream Name: SNOW CREEK (C. L. WHITE FARM)
Stream Location: SURRY COUNTY, NC
Station: ESW OUTLET ALL ROCK STRUCTURES BETWEEN 2+00 - 4+28
FLOW DEPTH = 2.2' SHEAR STRESS = RS = 62.4 x 1.79 x .040 = 4.5 Ib/ftz
Date: 7/6/2006 (50 year storm ESW Q-out flow = 560cfs from Dams2 routing)
In ut Variables Ou ut Varia bles
Cross-section area (Abp 62.5 ft Mean Depth (dh~) 1.95 ft
Width (Wb~) 32 ft Wetted Perimeter (WP) 36.60 ft
D84 (Riffle) 220 mm D84 0.72 ft
Slope (Sb~) 0.04 ft/ft Hydraulic Radius (R) 1.79 ft
Gravitational Acceleration () 32.2 ft/s2 R/D84 2.48 ft/ft
lt/D84, u/u*, Mannin s n
U/U~` = 7 ft/S/ftIS Using R/D84; Reference Reach Fietd Book, p.188; River Field Book, p.233
Mannm 's n = 0.034 (Reference Reach Field Book, p.189; River Field Book, p.236)
velOCl = 12.9 ftIS From Manning's equation u=(1.49Rv3S'~`)/n
u/u*=2.83+5.710 84)
u* = 1.5 ft/S u*=(BRS)o.s
VelOClty = 7.7 ft/S u~1*[2.83+5.71og(R/D84)J
Jarrett's E nation for estimatin Mannin 's n
n = Q,1 n= 0.39So.rsRa.w
Veloci = 4.2 ft/S From Mamung's equation u=(1.49R~S'n)/n
Mannin 's n b Stream T e (for lar a rivers
Stream Tye B4/a
Mannin 's n = 0.056 Reference Reach Field Book, p.187; River Field Book, p.237
V elOClty = 7.8 fUS From Manning's equation u=(1.49R~'351~")/n
Validate veloci calculations usin the Continui E nation
Draina e Area (mil) 2.1 Gage Station ESW (Q) OUT
Dischazge (Qb~ cfs 560 cfs
Veloci (u = Q/A) ft/s 9.0 ft/s
' Generated: 9/19/2006 1:55 PM

Velocity computation form(Snow Creek (100cfs) ESW)
Velocity Computation Form
Stream Name: SNOW CREEK (C. L. WHITE FARM
Stream Location: SURRY COUNTY, NC
Station: ESW OUTLET ALL ROCK STRUCTURES BETWEEN 2+85 - 4+28
FLOW DEPTH = 1.1' SHEAR STRESS = yRS = 62.4 x .96 x .040 = 2.4 Ib/ft2
Date: 7/6/2006 (BANKFULL Q FOR SNOW CREEK = 100cfs)
In ut Variables Ou ut Varia bles
Cross-section area (Abp 26 ft Mean Depth (dh~ 1.08 ft
Width (Wb~) 24 ft Wetted Perimeter (WP) 27.00 ft
D84 (Riffle) 220 mm D84 0.72 ft
Slope (Sb~) 0.04 ft/ft Hydraulic Radius (R) 0.96 ft
Gravitational Acceleration (g) 32.2 ft/s2 R/D84 1.33 ft/ft
R/D84, u/u*, Mannin s n
U/U* = 7 ft/S/ft/S Using R/D84; Reference Reach Field Book, p.188; River Field Book, p.233
MariIlin 's n = 0.034 (Reference Reach Field Book, p.189; River Field Book, p.236)
Velocity = 8.5 ft/S From Manning's equation u=(1.49R";S''')/n
u/u*=2.83+5.71og 84)
u* = 1.1 ft/s n*=(gRS)a.5
Veloci = 3.9 ft/s „=n•[2.83+5.71og(R/D84)]
Jarrett's E uation for estimating Manning's n
n = 0.1 n= 0.39So.3aRo.ie
VelOClty = 2.5 ft/S From Manning's equation u=(1.49R23S'n)/n
Mannin 's n by Stream T e (for lar a rivers)
Stream Tye B4/a
Mannm 's n = 0.056 Reference Reach Field Book, p.187; River Field Book, p237
Velocity = 5.2 ft/S From Mavning's equation u=(1.49R~'3S''')/n
Validate veloci calculations usin the Continui E uation
Draina e Area (mil) 2.3 Ga e Station ESW (Q) OUT
Discharge (Qb~) cfs 100 cfs
Veloci (u = Q/A) ft/s 3.8 ft/s
Generated: 9/19/2006 1:19 PM

C. L. WHITE PROPERTY, SURRY COUNTY, NC
POND IMPROVEMENT PROJECT 63a STREAM TYPE E sta. 1+75 - 2+00
Bankfull Shear Stress Calculation:
Hydraulic Radius (ft) 0.80
Slope (ft/ft) 0.150
T = (Ibs/ft2) 8.42
y = 0.5656Ln(x) + 2.98
Min. Rock Size = (ft) 4.185
Min. Rock Vol. (ft3) 73.315
Min. Rock Weight 8064.648
(assume 1101bs/ft3)

ii

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C. L. WHITE PROPERTY, SURRY COUNTY, NC
POND IMPROVEMENT PROJECT B3a STREAM TYPE E sta. 2+00 - 4+50
Bankfull Shear Stress Calculation:
Hydraulic Radius (ft) 1.79
Slope (ft/ft) 0.040
T = (Ibs/ftz) 4.47
y = 0.5656Ln(x) + 2.98
Min. Rock Size = (ft) 3.827
Min. Rock Vol. (ft3) 56.035
Min. Rock Weight 6163.803
(assume 1101bs/ft3)

P'L.r'~1' ~']~~~'
(after R~~ge~i~

(~~te~t~~ ~`~l~r~~ ~t~~ r~ae
~a*~~ a~r~t.
STEP-POOL SYSTEM
PROFILE VIEW
(after Rosen)

Footers
STEP -POOL SYSTEM
CROSS SECTION VIEW
(after Rosgen)

~ REFERENCE REACH - B3a/1

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Stream Classification Form
Stream Channel Classification (Level lq ...
Stream NAME: Goshen Creek B3a, Reach -Reach 1
Basin NAME: Drainage AREA: 960 acre l.5 mi2
Location:
T'wp: Rge: Sec: Qtr: Lat: 0 Long: 0
Observers: Date: 8/21/2006

Bankfull WIDTH (wb~ 24.07 Feet
WIDTH of the stream channel, at bankfnlI stage elevation, in a riffle section.

Mean pEP"fiH (dam i.li Feet
of the stream channel cross-sectiop, at bankfull stage elevation, in a riffie section.
Mean
DEP
T
H
`
~
T
/
A
ldbl-t^~'bld~ T! bk&
~ankfull Cross Section Afea (Abp ., 26.73 Feeiz
AREA of the stream channel cress-section, at bankfull stage elevation, in a riffle section.

WIDTH /DEPTH RATIO (W,,,~ /d6~ 21.68 Ft/Ft
Bankfull WIDTH divided by banldull mean DEPTH, in a riffie section.

Mazimnm DEPTH (dam 1.6 Feet
Maximum depth of the bankfull channel cross-section, or elevation between the bankfull stage and
thalweg in a riffle section.

Flood-Prone Area WIDTH (Wrp~ 38.44 Feet
The stage%levation at which flood-prone area WIDTH is determined in a riffie section at twice
rna_Ximum DEPTH, or (2 x d~

. Entrenchment RATIO (ER) 1.6 Ft/Ft
The ratio of flood-prone area WIDTH divided by banld'all channel WIDTT3 (W~/Wb~ in a riffle
section.

Channel Materials (Particle Size Indez) D50 69.2 mm
The 50th percentile, or less than, from a pebble count frequency distribution of channel particles
`' representing the median or dominant particle size.
Water Surface SLOPE (S) 0.06 Ft/Ft
Average water surface slope as measured between the same position of bed features in the profile
`' over two meander wave lengths. This is similar to average bankfull slope.

Channel SINUOSITY (~ i.i
Sinuosity: an index of channel pattern, determined from stream length /valley length, i_e. (SL/VL);
or estimated from a ratio of valley slope divided by channel slope (VS/ S).
Stream T e
yp B 3/ia ~` ~ ~ r~ ~ ~
~ Rosgerr, 1996. Applied River Morpholo9Y~
© 2005 Wildland Hydrology

1
1

Reference Reach Summary Data Form
... and Reference Reach Summary Data
Mean Riffle Depth (dam) t 1.06;feet Mean Riffle Width (Wb~ 27.27;feet Mean RifIIe Area (At~j 28.84; feet2
: ) ~ 1.44,feet Mean Pooi Width (W~) 30.83;feet
Mean Pool Depth (db Mean Pool Area (A~) : 44.17;feet2
~ ~
, .,;. . ; .:.
o
°'
~ ~ ~
Ratio Mean Pool
~~ W
~
t
_.
Ratio Pool Width/Riffie 1 1
1311 °
Ratio Pool Area/
; 1.5321A~
~
~ ~ L358~
D th/Mean Riffle
ep .db~r ,
6
.
Width ,W
RtffteArea
1 lAnl~r
m Max Riffle Depth (dam ~ 2.75rfeet Max Pool Depth (dm~ 42R;feet Max riffle depth/Mean riffle depth; 2.594
~ _,
L Max pool depth/Mean rif3le depth 14.038 Point Bar Slope 0
,

U ,
Streamtlow: Estimated Mean Velocity aY Bankfull Stage (u~ : 2.771f1/s
Estimation Method 0

ge t~ (Qr~ ~ 1 80; cfs
Streamtl~~w:l`.s-tlmatedDlschar atBankfullS
Drainage Area
1.5 ~ ~2
Geom ~ Ave Min Maa . Dimcnsiookss Geome Ratios Ave . Mir- Max
th (Lm) ~ 0~ 0~ O;feeT
Meander Len Meander Length Ratio (Lm/W~ ~ 0.000 0.000; 0.000 .
~ g _
ai
~ 0 Olfeet Radius of CurvaturelRi$le Width (RcJW~
0
Radius of Curvature (Rc) , 0000, 0000, 0000
~
~
m Belt Width ~c, 0~ 0; 0, feet
l •• bIV Meander Width Ratio (W~/W~ ; 0.000 0.000 0000 -
~ Individual Pool Length 1 15.411 5.631 26261feet Pool Length/Riflle Width 1 0.5651 02061 0.963
U - _.-_:
Pool to Pool Spacing ~ 37.7 9.29 70.76~feet Pool to Pool Spacing9Riffie Width
~ 1.3821 0341 ~ 2.595

Valley Slope (VS) 1 0" ift/ft Average Water Surface Slope (S} ~ 0.06 ;fllft :Sinuosity (VS/S) 1 1.1
.
..._,._

Stream Length (SL)1 0 [feet
.
Valley Length (VL) ~ 0 ifeet Sinuosity (SL/VL) 1 ~
start: Olfeet
L,ow Bank Height ,
-- MaxRitlle start; O~feet Bank Height Ratio ~#'

r-

(LBO --
E
end: O,feet
k ~
Depth ends O~feet
H/Max Riffle th endl ##### 1
(LB ~'P )
,
,,
Faccf Slo es Ave Ma . Mai Dimensionless Slo Ratios Ave Min Ma,~
Ri$leSlope(4 r) A.1090~OA869b.13431fiJfl ):iftlzSlopelAverageWaterSurfaceSlope(S,;~FS) ~ 1.816 1.449 2238;
is 1473 0.0241;02350; ft!ft
~ ;0
Run Slope (S Run Slope/Average Water Surface Slope (S„~/S) ; 2.456; 0.486; 3.916;
.
„
0
a
m
Pool Slope (Sp) x.009610-0043 A.Ot241f1/ft
Pool SlopelAverage Water Surface Slope (SP/S}
1 0.1541 0.0?2; 02071
Glide Slope (S~} X10186 0087r<102571ft/8 Glide SlopelAverage Wafer Surface Slope (SgIS) ~ 0311 ~ 0.144 0.429:
- L
U
N'6atureMid int' ;Ave Miu Max llimensionkss llepth Ratios
Ave Min Max,:...
Riffle Depth (dam 1 2.750 2360 2.940~ft~et R it11e Max Deplh,Riffle Mean Depth (dnnil/d~ ~ 2.594 2'?~61 2 774
Run Depth (dam ; 3.060; 2.640 3.5401feet Run Max Depih/Riffie Mean Depth (d~ld~ 2.887 2491 ~ 3340;

Pool Depth (dam) 1 4.280; 3.180; 6370;feet _ _
Pool Max Depthll2ifIIe Mean Depth (d~/d~
; 4.038, 3.000; 6009;
(ilidc 1>epth (d,r,) 1 2.6501 23601 2.930pfeet Glide Max Depthlf2i$le Mean D~~,th (d~/d~
L 1 25001 2 ~?61 2.7641

Ca41~~orics Reachh:: Riffle` Bar [ndic~ H~chb - Riffle` Bar
';~ Si1t/Clay 0 1 f~16 3.56 ;mm
_
~
.r 9 1 D35 20.71
: % Sand ~mm
~ -,. ,
%Gravel 40 1 D50 692
.mm '-

'.
c .~_~
% Cobble 15 1 D84 9728
~ mm
_

U .. _ -
% Boulder 23 ~ D95 Bedrock
.;~ , _..
__

Bedrock 13 1 D 100 Bedrock

-
.,-. .. ,
imm

.._,..
a. The range of "feature" mld-point maxunum Dan,ct~ Depots, mc,uamg u,c uu,wuuuy wu.v.uwu a,.u a..,,~
(Pool depths are obtained from the deepest portion of the feature.)
b. A composite sample of materials from riffie and pool featutes taken within the designated reach.
a Sample obtained within the "active" bed of a riffie feature at the location of the cross section.
© 2005 Wildland Hydrology

1

DESIGN INFORMATION
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~' .,~ 80° 48' 0.00"'u- 80° 4T 0.00" ~
ame: BOTTOM Location: 036° 22' 46.7" N 080° 47' 4 4.0" W
gate: 5/18/2006 Caption: C. L. WHITE (SNOW CRI=EK )
Scale: 1 inch equals 2000 feet STREAM RESTROATION
SURRY COUNTY, NC
a't......... Ate.... A~f07 ....~....

C

SOILS INVESTIGATION
C. L. WHITE POND REPAIR
SURRY COUNTY, NC
A soils investigation has been completed on the emergency spillway outlet and the
planned borrow areas, shown on the attached location map. This soils investigation has
been completed using the Unified Soils Classification System. Each sample is numbered
on the map in the location where the soil boring was made.
Emergency spillway outlet: (0 - 5') This soil material is a CL / MH material with
70+% fines (clay and silt) and approximately 30% very fine sand. The fines consist
of a clay /silt ratio that is close to 50% each. For clay, the plasticity rating is
moderate to low; for silt, the plasticity rating would be moderate to high. The soil
from the area of the emergency spillway can be used as fill in locations of
construction, as directed by the engineer.
' 2. Emergency spillway channel outflow section: (0 - 1') This soil material is SM.
(1' - 3') is CL and 3 - 5' is ML. The soil from this site will be placed in excavation
disposal area or used as backfill in the existing ESW outflow channel, as directed by
' the engineer.
3. Borrow area #1: (0 - 1') is ML, 1' - 4' is CL / MH and 4' - 6' is ML. The material
' from this borrow area will be used for fill of the reconstructed dam and in locations,
as directed by the engineer
' 4. Borrow area #2: (0 -1') is ML, 1' - 5' is CL / MH. The material from this borrow
area will be used if needed for fill in the reconstructed dam and in locations as,
directed by the engineer.
'
S. Existing dam: The soil material that was used in the existing dam is ML, CL and MH
material that was excavated and placed when the dam was constructed in 1980. The
' soil material that will be excavated from the dam and placed in stockpile will be free
of sod and will used as fill in the reconstructed dam and placed as directed by the
engineer.

1

ii
C

1

1
1

~~

C. L. White Pond Repair
Soils Investigation Location Map
(3)
POND WATERLINE
SOIL INVESTIGATION SITE
i
}
I CENTERLINE EXISTING DAM
0
TOE OF EXISTING DAM
TOP OF STREAM BANK

Velocity computation form(Snow Creek (Existing 0+00 - 6+60)
Velocity Computation Form
Stream Name: SNOW CREEK C. L. WHITE FARM)
Stream Location: SURRY COUNTY, NC
Station: 5+56
SLOPE FOR EXISTING STREAM REACH 0+00 - 6+60 = 0.009
Date: 8/ 1/2006
In ut Variab les Out ut Varia bles
Cross-section area (Ah~ 25.6 ft Mean Depth (db~ 1.05 ft
Width (Why 24.3 ft Wetted Perimeter (WP) 26.41 ft
D84 (Riffle) 102 mm D84 0.33 ft
Slope (Sb~) 0.009 ftlft Hydraulic Radius (R) 0.97 ft
Gravitational Acceleration () 32.2 ft/s2 R/D84 2.90 ft/ft
12/D84, Wu*, Mannin s n
U/U* = 5.7 ft/S/ftIS Using R/D64; Reference Reach Field Book, p.188; River Field Book P 233
Mannm 's n = 0.04 (Reference Reach Field Book, p.189; River Field Book, p.236)
Veloci = 3.5 ft/S FromManning'sequationu=(1.49RZ3S'~~n
Wu*=2.83+5.710 84)
u* = 0.5 ft/s n'=(gRS)u.s
Veloci = 2.9 ft/s n„«[z.83+s.71og(R/DSa)]
Jarrett's E uafion for estimatin Mannin 's n
n = 0.1 n= 0.39s038R-0'~6
Veloci = 2.1 ft/S From Manning's equation u=(1.49RyrS"~)/n
Mannin 's n by Stream T e (for lar a rivers
Stream T e C/4
Mannin 's n = 0.031 Reference Reach Field Book, p.187; River Field Book, p.237
Velocity= 4.5 ft/S FromManning'sequaROnu=(1.49Rz3s1°)/n
Validate velocity calculations usin the Continui E uation
Drainage Area (mil) 2 Ga e Station ESW (Q) OUT
Discharge (Qb~ cfs 98 cfs
Veloci (u = Q/A) ft/s 3.8 ft/s
Generated: 9/] 8/2006 11:35 PM

Revised N C Ru ra I Curve
1000
~ - -
~ -
Q
c~ 100 - __ - --
~ - -- -
O - - - ~~ - -- - -
._ _
~,.+ - -
v --- - ----- ---
~ - - - - -
~ 10 -
t~ _ -
~ _ _ -- -
L - -- - _
V - -
1
~ :7432 1 ~ 10 100 1000
y = 15.886x
R2 = 0.996 Drainage Area
DRAFT 51~A/2006
i
'~

Revised NC Rural Curve
10000
1000
d
C1
L
.~ 10
v
D
10
1
0.1 1 a 10 100
y = 56.136xo.soa~
RZ = 0.9903 Drainage Area
DRAFT 5/18/2006
i ~'

Stream Name
Un-named Tributary (Alleghany)
Un-named Trib. Mill Creek (Burry)
Ledford Branch (Buncombe)
Bledsoe Branch (McDowell)
Un-named Trib. Mill Creek (Burry)
Rebels Creek (Mitchell)
Shelton Branch (Haywood)
Long Hope Creek (Watauga)
South Fork Mitchell River (Burry)
Cathey's Creek (Rutherford)
N Prong South Fork Mitchell (Burry)
Roan Creek (Ashe)
Nicholson Creek (Transylvania)
South Fork Mitchell River (Burry)
Bee Tree (Buncombe)
Big Creek (Burry)
Eagle Fork Creek (Clay)
Cathey's Creek) Transylvania
Peachtree Creek (Cherokee)
Alarka Creek (Swain)
Yadkin River @ Patterson (Caldwell)
Mills River (Henderson)
South Fork New River (Ashe)
Drainage Area Cross-Section Area Discharge Stream Type Velocity
0.13 3.2 B4 0 12.
0.26 6.7
0.6 10.5 32 C4 3.047619 32
0.7 11.8 F4 0 44
0.7 13.2 E4
1.03 15.5 B4/1 c 0 60
1.3 18 64c
2.2 27 107 C4 3.962963
2.6 36.7 136 C4 3.705722
2.8 40.3 C4 0 128
4 44.4 C4 0
5 47.2 C4/1 0 200
5 49.8 E4 0 200
5.4 49.8 0
5.46 56 231.5 B3 4.133929
6.4 66 F4 0 242
7.1 65.4 63c 0 262
11.7 95 417 Bic 4.389474
18.2 158.1 C4 0 540
25.6 183 C3/1 b 0 703
28.8 194.8 964 C4/1 4.948665
66.7 333 1350 C4 4.054054
205 847.2 3220 B4/1 c 3.800755

River Name: Snow Creek
' Reach Name: c ~ white - Impacted
survey Date: 08/01/06

1

1
f
Upper Bank
~andform slope:
Mass wasting:
Debris lam Potential:
Vegetative Protection:
power Bank
Channel Capacity:
Bank Rock Content:
obstructions to Flow:
Cutting:
Deposition:
Channel Bottom
Rock Angularity:
Brightness:
consolidation of Particles:
Bottom size Distribution:
Scouring and Deposition:
,Aquatic Vegetation:
Channel Stability Evaluation
Sediment supply:
Stream Bed stability:
W/D Condition:
Stream Type:
Rating - 106
8
2
5
9
0
8
5
12
10
2
2
15
30
High
H~ghading
C-4
1

Total Station (Upper Reach)
11
11

C
O
11
N
W
11
11
• CH
o WS
• BKF
• LEW
o P2
+ P3
x P4
J '
~ ~ r ~ ~ ~ s ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~^^
0 500 1000 1500
Distance along stream (ft)

Total Station (Lower Reach)
.-
11
11
• CH
o WS
• BKF
C
O
N
W
11
1'
• P1
o P2
+ P3
x P4
~ ~ r ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~
1000 1200 1400- 1600 1800 2000
Distance along stream (ft)

River Name: Snow Creek
Reach Name: C L W hite - Impacted
' Cross Section Name: Pool @ 4+40
Survey Date: 06/07 /06

Cross Section Data Entry
' BM Elevation: 1170.54 ft
Backsight Rod Reading: 4.72 ft
' FS
TAPE ELEV--- -------_NOTE -
--------
------
0 8.6 -----
1166.66

' 7.6 8.7
8.5 9.4 1166.56
1165.86 BKF
10.7 9.8 1165.46
13.1 10.3 1164.96 LEw
17 10.5 1164.76
20 10.5 1164.76
23 10.7 1164.56
25.4 10.75 1164.51 Tw
' 27 10.6 1164.66
29 10.3 1164.96 REw
29.7 10.2 1165.06
' 30.3 8.8 1166.46
31.4 8.7 1166.56 BKF
32.7 8.5 1166.76
;33.3 8.4 1166.86
' ~_ 36 8.3 1166.96

cross sectional Geometry
---------
---------------------
' ------------------------- ------------ ---
Channel Left Right
Floodprone Elevation (ft) 1168.61 1168.61 1168.61
Bankfull Elevation (ft) 1166.56 1166_56 1166_56
Floodprone width (ft) 36
Bankfull width (ft) 23.8 11.9 11.9
' Entrenchment Ratio
Mean Depth (ft) 1.51
1.53
1.4 -
1.66
Maximum Depth (ft) 2.05 1.8 2.05
width/Depth Ratio 15.56 8.5 7.17
' Bankfull Area (sq ft) 36.4 16.66 19.74
wetted Perimeter (ft) 25.1 14.03 14.67
Hydraulic Radius (ft) 1.45 1.19 1.35
Begin BKF Station 7.6 7.6 19.5
' End BKF Station 31.4 19.5 31.4

' -------------------------
Entrainment Calculations
------------------------- ------------

------------ ------------

------------ ---------------------

---------------------
~-- Entrainment Formula: Rosgen Modified shields Curve
channel Left Side Right side

Shear Stress (lb/sq ft)
' Movable Particle (mm)
~l
C

~,

r

Pool @~ 4+40
o Ground Points • Bankfull ~ Water Surface
Indicators Points
Wbkf = 23.8 Dbkf = 1.5 Abkf = 36.4
11
11
.-
O
~ 11
N
W
11
11
Horizontal Distance (ft)

0 10 20 30 40

1
i
1
1
1
1
1
1
1
I.
1
1
1
1
1
1
1
1
1
River Name: Snow Creek
Reach Name: C L White - Impacted
cross Section Name: Riffle @ 5+36
survey Date: 06/07/06
Cross Section Data Entry
BM Elevation: 1170.54 ft
Backlight Rod Reading: 3.6 ft
TAPE
FS
ELEV
NOTE
---------
0 ----------------
4.9 ----------------
1169.24 -----------------------------
5.7 4.8 1169.34
5.9 7.9 1166.24
7.2 8.4 1165.74 BKF
7.9 9.1 1165.04
8.5 9.4 1164.74
8.9 10.15 1163.99
9.4 10.1 1164.04 LEW
10 10.3 1163.84
11.3 10.4 1163.74
12.6 10.3 1163.84
13.7 10.5 1163.64 TW
14.8 10.4 1163.74
15.7 10.15 1163.99
17 10.1 1164.04 REW
.17.8 9.7 1164.44
19.7 9.4 1164.74
22.5 9.3 1164.84
24.9 9 1165.14
27 8.8 1165.34
28.7 8.8 1165.34
31.5 8.4 1165.74 BKF
33.7 8.4 1165.74
35 8.2 1165.94
61 6.5 1167.64
65 6 1168.14
Cross Sectional Geometry
----------------------------------------------------------------------
Floodprone Elevation (ft)
Bankful l Elevation (ft)
Floodprone width (ft)
Bankful 1 width (ft)
Entrenchment Ratio
Mean Depth (ft)
Maximum Depth (ft)
width/Depth Ratio
'Bankfull Area (sq ft)
wetted Perimeter (ft)
Hydraulic Radius (ft)
Begin BKF Station
channel
1167.94
1165.79
57.61
26.95
2.14
1.05
2.15
25.67
28.17
28.06
1
7.07
Left
1167.94
1165.79
11.42
1.69
2.15
6.76
19.33
13.68
1.41
7.07
Right
1167.94
1165.79
15.53
0.57
1.Z4
27.25
8.84
16.85
0.52
18.49

1
1
1
1
1
1
1
1
1
1,
1
1
1
1
1
1
1
1
1
Entrainment Calculations
--------------------------------------------------
Entrainment Formula: Rosgen Modified Shields Curve
Channel Deft Side Right Side
Slope 0 0 0
Shear Stress (lb/sq ft)
Movable Particle (mm)

Riffle @~ 5+3
o Ground Points • Bankfull ~ Water Surface
Indicators Points
Wbkf = 24.3 Dbkf = 1.1 Abkf = 26.8
11
11
~ 11
O
Ca
~ 11
W
11
11
Horizontal Distance (ft)

0 20 40 60 80

River Name:
Reach Name:
Cross Section Name:
Survey Date:
Snow Creek
C L white - Impacted
Riffle @ 12+99
06/07/06
~'

n

~.

----------------------------------------------------------------------
Cross Section Data Entry
BM Elevation: 1163.81 ft
Backlight Rod Reading: 3.11 ft
TAPE FS ELEV NOTE
------

0 -----
-------
4.3 -------
------
1162.62 ----
_
--------------------
3 4.3 1162.62
4 4.8 1162.12
5.8 5.4 1161.52
6.5 5.7 1161.22 BKF
8.6 7.35 1159.57 LEw
11.5 7.7 1159.22 Tw
13.8 7.6 1159.32
15.5 7.35 1159.57 REw
17.7 7.1 1159.82
20 7.2 1159.72
24 6.7 1160.22
26.2 5.7 1161.22 BKF
27 4.8 1162.12
28.2 4.1 1162.82
,32.5 4 1162.92
Cross Sectional Geometry
----------------------------------------------------------------------
Floodprone Elevation (ft)
Bankfull Elevation (ft)
Floodprone width (ft)
Bankful l width (ft)
Entrenchment Ratio
Mean Depth (ft)
Maximum Depth (ft)
width/Depth Ratio
Bankfull Area (sq ft)
wetted Perimeter (ft)
Hydraulic Radius (ft)
Begin BKF Station
End BKF Station
channel
1163.22
1161.22
32.5
19.7
1.65
1.39
2
14.17
27.32
20.58
1.33
6.5
26.2
Left
1163.22
1161.22
9.85
1.61
2
6.12
15.89
12.02
1.32
6.5
16.35
Right
1163.22
1161.22
9.85
1.16
1.55
8.49
11.43
11.66
0.98
16.35
26.2
----------------------------------------------------------------------
' Entrainment Calculations
----------------------------------------------------------------------
~` Entrainment Formula: Rosgen Modified Shields Curve
^ Channel Left Side Right Side
Slope 0 0 0
1

f ~+q q
o Ground Points • Bankfull ~ Water Surface
Indicators Points
Wbkf = 19.7 Dbkf = 1.4 Abkf = 27.3
11~c
~~
11
O
c6
_N
W
11
11
Horizontal Distance (ft)

0 10 20 30 40

'~
i~

L

River Name: Snow Creek
Reach Name: C L White - Impacted
Cross Section Name: Riffle @ 16+64
Survey Date: 06/07/06
----------------------------------------------------------------------
Cross Section Data Entry
BM Elevation- 1163.81 ft
Backlight Rod Reading: 3.11 ft
TAPE FS ELEV _NOTE_
--------------------
---------
0 _____
_
- ------
3.7 _______
------
1163.22 ___
2.4 3.9 1163.02
3.7 5.5 1161.42
5.7 6.3 1160.62 BKF
7.3 6.7 1160.22
8 7.1 1159.82
8.6 8.1 1158.82 LEW
9.5 8.2 1158.72
11.7 8.3 1158.62 Tw
13 8.2 1158.72
14.5 8.1 1158.82 REW
18 7.9 1159.02
23 7.7 1159.22
27.7 7.6 1159.32
28.3 6.7 1160.22
29 4.8 1162.12
30 4.3 1162.62
33 3.8 1163.12
35 3.5 1163.42
----------------------------------------------------------------------
Cross Sectional Geometry
----------------------------------------------------------------------
Floodprone Elevation (ft)
Bankfull Elevation (ft)
Floodprone width (ft)
Bankfull width (ft)
Entrenchment Ratio
Mean Depth (ft)
Maximum Depth (ft)
width/Depth Ratio
Bankfull Area (sq ft)
wetted Perimeter (ft)
Hydraulic Radius (ft)
Begin BKF Station
End BKF Station
channel
1162.62
1160.62
27.27
22.75
1.2
1.46
2
15.58
33.12
24.26
1.37
5.7
28.45
Left
1162.62
1160.62
12.11
1.52
2
7.97
18.43
14.46
1.27
5.7
17.81
Right
1162.62
1160.62
10.64
1.38
1.61
7.71
14.69
13.01
1.13
17.81
28.45
----------------------------------------------------------------------
~ _Entrainment Calculations
Entrainment Formula: Rosgen Modified shields Curve

~.
i
1
1
f
1
Slope
Shear Stress (lb/sq ft)
Movable Particle (mm)
Channel
0
deft Side Right side
0 0

Riffle C~ 16+~
o Ground Points • Bankfull ~ ~ Water Surface
Indicators Points
Wbkf = 22.7 Dbkf = 1.5 Abkf = 33.1
1165
1160
O
t~
_N
L1.1 1155
115C
0
Horizontal Distance (ft)
~,
. . . . . . . . . . . . . . . . . . .
10 20 30 40

River Name: snow Creek
' Reach
----- Name: C L
---------- white - Impacted
-------------------------------------------------------

' ------
Table ---------
1. Bank -------------------------------------------------------
Identification Summary
Bank Name
1 Reach #1 (L & R)
' 2 Reach #2 ~ & R)
3 Reac h # 3 (1 eft)
4 Reach #3 (right)
S Reach #4 (left)
' 6 Reach # 5 (left)
7 Reach # 5 (right)

i 8
9 Reach
Reach # 6 (left)
#7 (right)
10 Reach # 8 (left)
11 Reach # 9 (right)
1 12 Reach # 10 (1 eft)
13 Reach # 11 (left)
14 Reach #12 (right)
' 15 Reach # 13 (right)
----------------------------------------------------------------------
Table 2. Predicted Annual Bank Erosion Rates
BEHI BEHI NBS
' Numeric Adjective Adjective Length Loss Loss
Bank Rating Rating Rating ft cu yds/yr tons/yr
' 1 27 Moderate High 370 7.4 9.62
2 35.4 High High 220 28.52 37.08
3 25.3 Moderate Low 200 0.24 0.31
4 30.2 High High 160 5.33 6.93
5 43.3 very High Extreme 100 46.3 60.19
6 26.2 Moderate Moderate 170 3.78 4.91
7 27.5 Moderate High 170 4.82 6.27
8 48.9 Extreme very High 160 72.41 94.13
9 21.4 Moderate Low 200 2.41 3.13
10 29 Moderate High 100 2.59 3.37
11
12 34.5
39.5 High
High very High
High 110
115 9.78
11.93 12.71
15.51
13 35.6 High High 90 8.17 10.62
14 35.8 High Moderate 190 8.44 10.97
' 15 36.9 High Moderate 120 4.04 5.25
,~ Totals 2475 216.16 281
'~` Total Reach Ln: 2100 Total Loss (tons/y r) per ft of Reach: 0.1338

River Name: SNOW CREEK
Reach Name: Reach 1
BEHI Name: Reach #1 (L & R)
Survey Date: 07/02/06
Bankfull Height: 2 ft
t Bank Height: 3.6 ft
Root Depth: 3.4 ft
Root Density: 45. %
' Bank Angle: 90 Degrees
surface Protection: 70
' Bank Material Adjustment: Sand.3
Bank Stratification Adjustment. None 0
Erosion Loss Curve: Yellowstone
' NBS Method #5: Ratio of Near-Bank Maximum Bankfull Depth to
Mean Bankfull Depth
' NB Max Depth: 3.6 ft Mean Depth: 1.6 ft
Ratio: 2.25
BEHI Numerical Rating: 27.0
' BEHI Adjective Rating: Moderate
NBS Numerical Rating: 2:25
NBS Adjective Rating: High
Total Bank Length: 370 ft
Estimated sediment Loss: 7.4 Cu Yds per Year
Estimated Sediment Loss: 9.62 Tons per Year

n

r

River Name: SNOW CREEK
Reach Name: Reach 1
BEHI Name: Reach #2 L & R)
Survey Date: 07/02/06
' Bankfull Height: 1.8 ft
Bank Height: 5 ft
Root Depth: 3.5 ft
Root Density: 25 %
' Bank Angle: 75 Degrees
Surface Protection: 35
' Bank Material Adjustment: sand 5
Bank stratification Adjustment: None 0
' Erosion Loss Curve: Yellowstone
----------------------------------------------------------------------
NBS Method #5: Ratio of Near-Bank Maximum Bankfull Depth to
Mean Bankfull Depth
' NB Max Depth: 5 ft Mean Depth: 2 ft
Ratio: 2.50
BEHI Numerical Rating: 35.4
' BEHI Adjective Rating: High
NBS Numerical Rating: 2.5
NBS Adjective Rating: High
' Total Bank Length: 220 ft
Estimated Sediment Loss: 28.52 Cu Yds per Year
Estimated sediment Loss: 37.08 Tons per Year

River Name: SNOW CREEK
' Reach Name: Reach 1
BEHI Name: Reach # 3 (left)
Survey Date: 07/02/06
' Bankfull Height: 1.6 ft
Bank Height: 2 ft
Root Depth: 1 ft
Root Density: 40
' Bank Angle: 40 Degrees
Surface Protection: 80 %
' Bank Material Adjustment: sand 5
Bank Stratification Adjustment: None 0
Erosion Loss Curve: Yellowstone
' NBS Method #5: Ratio of Near-Bank Maximum Bankfull Depth to
Mean Bankfull Depth
' NB Max Depth: 2 ft Mean Depth: 1.6 ft
Ratio: 1.25
BEHI Numerical Rating: 25.3
' BEHI Adjective Rating: Moderate
NBS Numerical Rating: 1.25
NBS Adjective Rating: Low
' Total Bank Length: 200 ft
Estimated sediment Loss: 0.24 Cu Yds per Year
Estimated sediment Loss: 0.31 Tons per Year
~'

River Name: SNOW CREEK
Reach Name: Reach 1
BEHI Name: Reach #3 (right)
Survey Date: 07/02/06
Bankfull Height: 2.3 ft
Bank Height: 4.5 ft
Root Depth: 4.5 ft
Root Density: 40 %
' Bank Angle: 90 Degrees
surface Protection: 60
Bank Material Adjustment: sand 5
Bank Stratification Adjustment: None 0
Erosion Loss Curve: Yellowstone
NBS Method #5: Ratio of Near-Bank Maximum Bankfull Depth to
Mean Bankfull Depth
' NB Max Depth: 4.5 ft Mean Depth: 2.3 ft
Ratio: 1.96
BEHI Numerical Rating: 30.2
BEHI Adjective Rating: High
NBS Numerical Rating: 1.96
NBS Adjective Rating: High
' Total Bank Length: 160 ft
Estimated Sediment Loss: 5.33 Cu Yds per Year
Estimated Sediment Loss: 6.93 Tons per Year

River Name: SNOW CREEK
Reach Name: Reach 1
BEHI Name: Reach #4 (left)
~ Survey Date: 07/02/06
' Bankfull Height: 2 ft
Bank Height: 5 ft
Root Depth: 1 ft
Root Density: 40
Bank Angle: 80 Degrees
Surface Protection: 15
Bank Material Adjustment: sand 5
Bank Stratification Adjustment: None 0
Erosion~Loss Curve: Yellowstone
NBS Method #2: Ratio of Radius of Curvature to Bankfull width
' Radius of Curvature: 30 ft Bankfull width: 25 ft
Ratio: 1.20 psf
' ~ BEHI Numerical Rating: 43.3
BEHI Adjective Rating: very High
' NBS Numerical Rating: 1.2 ,
NBS Adjective Rating: Extreme
Total Bank Length: 100 ft
Estimated Sediment Loss: 46.3 Cu Yds per Year
Estimated Sediment Loss: 60.19 Tons per Year

~~.
0

River Name: SNOW CREEK
' Reach. Name: Reach 1
BEHI Name: Reach # 5 (left)
Survey Date: 07/02/06
Bankfull Height: 2.3 ft
Bank Height: 4 ft
Root Depth: 3.8 ft
Root Density: 50 %
', Bank Angle: 80 Degrees
Surface Protection: 70
Bank Material Adjustment: sand 5
Bank Stratification Adjustment: None 0
,I Erosion Loss Curve: Yellowstone
'I NBS Method #5: Ratio of Near-Bank Maximum Bankfull Depth to
Mean Bankfull Depth
'I NB Max Depth: 4 ft Mean Depth: 2.3 ft
Ratio: 1.74
1~-- -----------------------------------------------------------------------
BEHI Numerical Rating: 26.2
'I BEHI Adjective Rating: Moderate
NBS Numerical Rating: 1.74
NBS Adjective Rating: Moderate
' Total sank Length: 170 ft
Estimated Sediment Loss: 3.78 Cu Yds per Year
Estimated sediment Loss. 4.91 Tons per Year

r
ii

River Name: SNOW CREEK
' Reach Name: Reach 1
BEHI Name: Reach # 5 (right)
Survey Date: 07/02/06
' Bankfull Height: 2.3 ft
Bank Height: 4.5 ft
Root Depth: 4.2 ft
Root Density: 50 %
' Bank Angle: 8Q Degrees
Surface Protection: 70 %
' Bank Material Adjustment: Sand 5
Bank stratification Adjustment: None 0
'I Erosion Loss Curve: Yellowstone
----------------------------------------------------------------------
' NBS Method #5: Ratio of Near-Bank Maximum Bankfull Depth to
Mean Bankfull Depth
' NB Max Depth: 4.5 ft Mean Depth: 2.3 ft
Ratio: 1.96
BEHI Numerical Rating: 27.5
' BEHI Adjective Rating: Moderate
NBS Numerical Rating: 1.96
NBS Adjective Rating: High
' Total Bank Length: 170 ft
Estimated Sediment Loss: 4.82 Cu Yds per Year
Estimated Sediment Loss: 6.27 Tons per Year

~.

River Name: SNOW CREEK
Reach Name: Reach 1
BEHI Name: Reach # 6 (left)
~ Survey Date: 07/02/06
Bankfull Height: 2.2 ft
Bank Height: 4.7 ft
Root Depth: 0.7 ft
Root Density: 25
Bank Angle: 90 Degrees
surface Protection: 5
Bank Material Adjustment: sand 5
Bank stratification Adjustment: None 0
Erosion Loss Curve: Yellowstone
NBS Method #5: Ratio of Near-Bank Maximum Bankfull Depth to
Mean Bankfull Depth
' NB Max Depth: 4.7 ft Mean Depth: 1.6 ft
Ratio: 2.94
~- BEHI Numerical Rating: 48.9
BEHI Adjective Rating: Extreme
NBS Numerical Rating: 2.94
NBS Adjective Rating: very High
' Total Bank Length: 160 ft
Estimated Sediment Loss: 72.41 Cu Yds per Year
Estimated Sediment Loss. 94.13 Tons per Year

r

River Name: SNOW CREEK
Reach Name: Reach 1
BEHI Name: Reach #7 (right)
~ 'Survey Date: 07/02/06
' Bankfull Height: 2.3 ft
Bank Height: 2.5 ft
Root Depth: 1.5 ft
Root Density: 50
Bank Angle: 75 Degrees
Surface Protection: 80
' Bank Material Adjustment: 3
Bank Stratification Adjustment: None 0
Erosion Loss Curve: Yellowstone
----------------------------------------------------------------------
1 NBS Method #5: Ratio of Near-Bank Maximum Bankfull Depth to
Mean Bankfull Depth
' NB Max Depth: 2.5 ft Mean Depth: 1.8 ft
Ratio: 1.39
~ BEHI Numerical Rating: 21.4
BEHI Adjective Rating: Moderate
NBS Numerical Rating: 1.39
NBS Adjective Rating: Low
' Total Bank Length: 200 ft
Estimated Sediment Loss: 2.41 Cu Yds per Year
Estimated Sediment Loss. 3.13 Tons per Year

' River Name: SNOW CREEK
Reach Name: Reach 1
BEHI Name: Reach # 8 (left)
survey Date: 07/02/06
' Bankfull Height: 1.8 ft
Bank Height: 3.5 ft
Root Depth : 3 ft
Root Density: 45 %
' Bank Angle: 80 Degrees
Surface Protection: 40
' Bank Material Adjustment: sand 3
Bank Stratification Adjustment: None 0
' Erosion Loss Curve: Yellowstone
' NB5 Method #5: Ratio of Near-Bank Maximum Bankfull Depth to
Mean Bankfull Depth
' NB Max Depth: 3.5 ft Mean Depth: 1.7 ft
Ratio: 2.06
~~- BEHI Numerical Rating: 29.0
' BEHI Adjective Rating: Moderate
NBS Numerical Rating: 2:06
NBS Adjective Rating: High
Total Bank Length: 100 ft
Estimated Sediment Loss: 2.59 Cu Yds per Year
Estimated sediment Loss: 3.37 Tons per Year

L
1

1'

' River Name: SNOW GREEK
Reach Name: Reach 1
BEHI Name: Reach # 9 (right)
survey Date: 07/02/06
' Bankfull Height: 2 ft
Bank Height: 4 ft
Root Depth: 1.3 ft
Root Density: 50 %
' Bank Angle: 80 Degrees
Surface Protection: 75
' Bank Material Adjustment: Sand 5
Bank stratification Adjustment: None 0
' Erosion Loss Curve: Yellowstone
NBS Method #2: Ratio of Radius of Curvature to Bankfull width
' Radius of curvature: 40 ft Bankfull width: 25 ft
Ratio: 1.60 psf
-------------------------------------------------------------
' ~ BEHI Numerical Rating: 34.5
`- BEHI Adjective Rating: High
' NBS Numerical Rating: 1.6
NBS Adjective Rating: very High
Total Bank Length: 110 ft
' Estimated sediment Loss: 9.78 Cu Yds per Year
Estimated Sediment Loss: 12.71 Tons per Year

River Name: SNOW CREEK
' Reach Name: Reach 1
BEHI Name: Reach # 10 (left)
Survey Date: 07/02/06
' Bankfull Height: 2 ft
Bank Height: 4 ft
Root Depth. 0.7 ft
Root Density: 35 %
' Bank Angle: 80 Degrees
surface Protection: 50
' Bank Material Adjustment: sand's
Bank stratification Adjustment. None 0
' Erosion Loss Curve: Yellowstone
NBS Method #5: Ratio of Near-Bank Maximum Bankfull Depth to
Mean Bankfull Depth
' NB Max Depth: 4 ft Mean Depth: 1.8 ft
Ratio: 2.22
BEHI Numerical Rating: 39.5
' BEHI Adjective Rating: High
NBS Numerical Rating: 2.22
NBS Adjective Rating: High
Total Bank Length: 115 ft
' Estimated Sediment Loss: 11.93 Cu Yds per Year
Estimated Sediment Loss: 15.51 Tons per Year

u

River Name: SNOW CREEK
Reach Name: Reach 1
BEHI Name: Reach # 11 (left)
~ Survey Date: 07/02/06

' Bankfull Height: 1.8 ft
Bank Height: 3.5 ft
Root Depth. 0.7 ft
Root Density: 35 %
' Bank Angle: 60 Degrees
Surface Protection: 65
' Bank Material Adjustment: sand 5
Bank stratification Adjustment: None 0
' Erosion Loss Curve: Yellowstone
1 NBS Method #5: Ratio of Near-Bank Maximum Bankfull Depth to
Mean Bankfull Depth
' NB Max Depth: 3.5 ft Mean Depth: 1.8 ft
Ratio: 1.94

BEHI Numerical Rating: 35.6
BEHI Adjective Rating: High
' NB5 Numerical Rating: 1.94
NBS Adjective Rating: High
' Total Bank Length: 90 ft
Estimated Sediment Loss: 8.17 Cu Yds per Year
Estimated sediment Loss: 10.62 Tons per Year

River Name: SNOW CREEK
' Reach Name: Reach 1
BEHI Name: Reach #12 (right)
Survey Date: 07/02/06
Bankfull Height: 2 ft
Bank Height: 3 ft
Root Depth: 0.7 ft
Root Density: 35 %
' Bank Angle: 80 Degrees
Surface Protection: 60 %
Bank Material Adjustment: Sand 5
Bank stratification Adjustment: None 0
' Erosion Loss Curve: Yellowstone
NBS Method #5: Ratio of Near-Bank Maximum Bankfull Depth to
Mean Bankfull Depth
NB Max Depth: 3 ft Mean Depth: 1.7 ft
Ratio: 1.76

BEHI Numerical Rating: 35.8
BEHI Adjective Rating: High
' NBS Numerical Rating: 1.76
NBS Adjective Rating: Moderate

' Total Bank Length: 190
Estimated Sediment Los ft
s: 8.44 Cu Yds per Year
Estimated Sediment Los s: 10.97 Tons per Year

1

' River Name: SNOW CREEK
Reach Name: Reach 1
BEHI Name: Reach # 13 (right)
survey Date: 07/02/06
Bankfull Height: 1.6 ft
Bank Height: 2.6 ft
Root Depth: 0.7 ft
Root Density: 30 %
' Bank Angle: 70 Degrees
Surface Protection: 30
Bank Material Adjustment: Sand 5
Bank Stratification Adjustment: None 0
Erosion Loss Curve: Yellowstone
NBS Method #5: Ratio of Near-Bank Maximum Bankfull Depth to
Mean Bankfull Depth
' NB Max Depth: 2.6 ft Mean Depth: 1.7 ft
Ratio: 1.53
~ BEHI Numerical Rating: 36.9
' BEHI Adjective Rating: High
NBS Numerical Rating: 1.53
NBS Adjective Rating: Moderate
' Total Bank Length: 120 ft
Estimated Sediment Loss: 4.04 cu Yds per Year
Estimated Sediment Loss. 5.25 Tons per Year

C
1

1'
1

' River Name: Snow Creek Trib.
Reach Name: Reach 1
----------------------------------------------------------------------
Table 1. Bank Identification Summary
Bank Name
1 sta. 0+00 - 0+70 (~ & R banks)
2 Pool Near Banks
3 Riffle sections
---------------------------------------------
' Table 2. Predicted Annual Bank Erosion Rates
BEHI BEHI NBS
Numeric Adjective Adjective Length joss joss
' Bank Rating Rating Rating ft cu yds/yr tons/yr
1 25.6 Moderate High 70 0.47 0.61
2 25.5 Moderate High 180 2.4 3.12
' 3 18.6 how Moderate 140 0.15 0.2
' Totals 390 3.02 3.93
' Total Reach ~n: 400 Total Eoss (tons/yr) per ft of Reach: 0.0098

i
1

1l.
1

' River Name: Snow Creek Trib.
Reach Name: Reach 1
BEHI Name: Pool Near Banks
Survey Date: 07/28/06
' Bankfull Height: 1.1 ft
Bank Height: 1.8 ft
Root Depth: 1.6 ft
Root Density: 40 %
' Bank Angle: 80 Degrees
Surface Protection: 80
' Bank Material Adjustment: Sand 4
sank Stratification Adjustment: None 0
' Erosion Loss Curve: Yellowstone
' NBS Method #2: Ratio of Radius of Curvature to Bankfull width
' Radius of Curvature: 13 ft
Ratio: 1.86 psf
,l

Bankfull width: 7 ft
sEHI Numerical Rating: 25.5
BEHI Adjective Rating: Moderate
NBS Numerical Rating: 1.86
NBS Adjective Rating: High
Total sank Length: 180 ft
Estimated Sediment Loss: 2.4 Cu Yds per Year
Estimated Sediment Loss: 3.12 Tons per Year

River Name: Snow Creek Trib.
' Reach Name: Reach 1
BEHI Name: Riffle Sections
Survey Date: 07/28/06
~
t ------------ ----------------------------------------------------------
' Bankfull Height: 1.3 ft
sank Height: 0.7 ft
Root Depth. 0.9 ft
Root Density: 30
' Bank Angle: 80 Degrees
Surface Protection: 70 %
' sank Material Adjustment: 0
sank Stratification Adjustment: None 0
' Erosion Loss Curve: Yellowstone
' NBS Method #5: Ratio of Near-Bank Maximum Bankfull Depth to
Mean Bankfull Depth
' NB Max Depth: 1 ft Mean Depth: 0.6 ft
Ratio: 1.67
BEHI Numerical Rating: 18.6
' BEHI Adjective Rating: Low
NBS Numerical Rating: 1.67
NBS Adjective Rating: Moderate
' Total Bank Length: 140 ft
Estimated Sediment Loss: 0.15 Cu Yds per Year
Estimated Sediment Loss. 0.2 Tons per Year

1

~l

River Name: Snow Creek Trib.
Reach Name: Reach 1
BEHI Name: Sta. 0+00 - 0+70 (L & R banks)
Survey Date: 07/28/06
Bankfull Height: 0.8 ft
Bank Height: 1.2 ft
Root Depth: 1 ft
Root Density: 40 %
Bank Angle: 70 Degrees
surface Protection: 80
Bank Material Adjustment: sand 5
Bank Stratification Adjustment: None 0
Erosion Loss Curve: Yellowstone
NBS Method #5: Ratio of Near-Bank Maximum Bankfull Depth to
Mean Bankfull Depth
' NB Max Depth: 1.2 ft
Ratio: 2.00
Mean Depth: 0.6 ft
BEHI Numerical Rating: 25.6
BEHI Adjective Rating: Moderate
NBS Numerical Rating: 2
NBS Adjective Rating: High
Total Bank Length: 70 ft
Estimated sediment Loss: 0.47 cu Yds per Year
Estimated sediment Loss: 0.61 Tons per Year