HomeMy WebLinkAbout20010103 Ver 1_COMPLETE FILE_2001012501 0103, Eddie Harris/Bob Cockerham, Surry County
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Subject: 010103, Eddie Harris/Bob Cockerham, Surry County
Date: Mon, 12 Feb 2001 10:26:18 -0500
From: Jennifer Frye <jennifer.frye@ncmail.net>
Organization: NC DENR Water Quality
To: "cyndi.karoly" <cyndi.karoly@ncmail.net>
CC: Dave Penrose <Dave.Penrose@ncmail.net>
Cyndi - Staff report completed -
Dave - This is another stream restoration project that you might be
interested in - this project is also in Surry Co. , so we might be able
to look at this one too when you come to the RO.
Thanks,
Jen
Jennifer Serafin Frye
Division of Water Quality
NC Department of Environment and Natural Resources
Winston-Salem Regional Office
Winston-Salem, NC 27107
Voice: 336-771-4608 ext. 275 Fax: 336-771-4630
1 of 1 2/14/0111:41 AN
MEMORANDUM
TO: ? John Dorney
Non-Discharge Branch
Regional Contact: Jennifer Frye
WO Supervisor: 1 arnY Coble
Date:
SUBJECT: WETLAND STAFF REPORT AND RECOMMENDATIONS
Facility Name Eddie Harris and Bob Cockerham County Surry
Project Number 01 0103 County2
Recvd From APP Region Winston-Salem
Received Date 1/25/01 Recvd By Region 2/2/2001
Project Type stream restoration
Certificates Stream Stream Impacts (ft.)
Permit Wetland Wetland Wetland Stream Class Acres Feet
Type Type Impact Score Index Prim. Supp. Basin Req. Req. ME
27 Stream PT O N F 16-62-13 F C ? 30,702. ? 570.00 570.00 F-
Mitigation Wetland
T
e l0\
A00
MitigationType yp
Acres Feet
Is Wetland Rating Sheet Attached? O Y ON Did you request more info? O Y ON
Have Project Changes/Conditions Been Discussed With Applicant? O Y O N
Is Mitigation required? O Y O N Recommendation: Q Issue O Issue/Cond O Deny
Provided by Region: Latitude (ddmmss) 362107 Longitude (ddmmss) 805128
Comments:
The WSRO recommends that a WO Certification be issued for this stream restoration project.
cc: Regional Office
Central Office Page Number 1
CIO f
Febcuary 27, 2001
DWOt 01-0103
Suny Gocmfy
Edda Harris
848 Lkerty Screooi Read
SLafe- Fkiaci, NC, 28676
And
Bob Cale
1700 Saarka Poad
Charx.qae, NC, 28206
APPR VAL of 401 Water Qua ty C.----Frficmrwn w!U Addi 1cwwA Condon
Deer I&- Harris and Nfr _ God-- n:
You have our approval, a3 accerccance; with the adached comet-bons, to cor>Jtnx:,,? a s?r?n restorajon Pcrje? on yCxx two Properties
in 5x.-f Couritq, as des=t>ed in your appi Gabon recaFn ed by the Division of Water. G+aakr ors lanuafy 25, 2001- After re•Aqneng your
aPpura5ron, we have del--rmined that -hs fiil is covered by Ger,Ecad Water C±saldy Gera' i ldrumber 3256. This. CE bon aRrows you
to t1Sc Najonwk a Pew Nurnoer z.: when it is issued by the U"S_ Army Corps & Erra',e-s in adcWtlon, you -<-Jocnld get any other
fede,&-' or local pamus before wz>u ao ahead wrfh your proms ixcfLKkV (NA nct imded lo) Sacknent and Eason Canbot, Non-
Ds..:: -,qe and Water Supply'Naters ad regulations" Also U-Is approval will expa-. wien the a +irog 4-04 pemad expires unless
oti wtse specMed in Ire General Cyr cxL
nm approval is only valid for tip purpose and design that you descrRied in yccs appk?ajas. If yoer change your Proms You merit
noticg is and you may be requna?d to send rss a new arnoLcatim jDr a new cer crL If the- prape::y is sold, the new owmr nxis! be
aiven a copy od the Ce:-ir?a crr and approval letter and is the--coy resporsibie for cC?errp fm- with 8A cecamorrs If tom wetlarsd Ms for
6S PcayXt (nCW or in tthe future) exce-ed ors acre, corepensahocy rrr on may be rege.Ared as ciesc?d in 15A NCA:C 2H "05W (h)_
For figs approval to be vm]id, yc o muS`iAcvvthe Commons ffs?ed in the attached cecMdaJim as well as the addmoral corzfition descrR)ed
beic w--
i _ If the proje--"s to bc-used ttrr comiperk, 3 y? inilig then moculonng wAbe needed.
if you do riot accept any ref fhe c:3rrcens of this certific +a you may ask for are a[ *eca ciry hearing. You nxm act vAthin 60 days
of the ate that you receive this letter- To ask for a hearing, serd a when pesbon wr=n coctorans to Chapter 1506 of tine Nash Carolina
Genial) Statufss to the Office cd Admki istra5ve Hearings, P"O" Box 27447, Raleigh, MC_ 2-1511-7447- This cerMcation and iS onS
are triad and boxtrrg rrmless you ask titer a hearing-
r rtes letter compre es the reviEAc toff the Division Cf Watef QIJeHy under Secion 401 at tie- Clean Water AcL If you have any
que n , pie?ase telephone Jaan Dcrray aC 919-733-9346.
Kerr T" Stye ewes
Attacrrrreent
cc- Corps of Engineens Flak-rah Fled
VarrsUon-Salem DWO Rec_ mnaf 01fice
Ci?n#ral Files
File Copy
FF.chiard Everhar? USDA,. P-0. Eox 2tS, Dobson_ NC, 27Ur 7
(Y-90103
VYNarn G Px?ss Jr Spry
DE -mil cr E-nio<me-A and Nauasl Resowces
3C?r i _ S?vE: s
Divssv or W=r--- Oietidy
USDA United States Natural Resources P. O. Box 218
---?"- Department of Conservation Dobson, NC 27017
Agriculture Service Telephone: 336-386-8751
January 24, 2001
To: John Dorney c<_
a ? 7if11
From: . is and Everhart
Subject: Permit Application
I am working with Bob Cockerham and Eddie Harris on a stream project to address
streambank erosion and fish habitat. A check for $475 to cover the permit fee is
included. If you need additional information or have any questions about the project
please give me a call.
01010 3
PAYMENT
RECEIVED
x
State of North Carolina
Department of Environment
and Natural Resources
Division of Water Quality
James B. Hunt, Jr., Governor
Bill Holman, Secretary
Kerr T. Stevens, Director
11kT1?WAA
IT
NC ENR
NORTH CAROLINA DEPARTMENT OF
ENVIRONMENT AND NATURAL RESOURCES
February 7, 2001
DWQ # 010103
Eddie Harris
C/O Ralph D. Harris
219 Pat Nixon Road
State Road, NC 28676
Dear Mr Harris:
Due to a bit of miscommunication and/or confusion, you were told to pay us a
$475 fee (check # 2034) for approval of your 401 Water Quality Certification. After
talking to Mr Everhardt we realize we needed to send you a refund.
Please call me at 919-733-1786 if you have any questions.
Sincerely,
#
Robert Ridings
Wetlands/401 Unit 4401 Reedy Creek Road Raleigh, North Carolina 27607
Telephone 919-733-1786 FAX # 733-9959
An Equal Opportunity Affirmative Action Employer 50% recycled/10% post consumer paper
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I. OWNERS NAME: Eddie Harris
D?
DEM ID: 0.101.0
CORPS ACTION ID:
NATIONWIDE PERMIT REQUESTED (PROVIDE NATIONWIDE PERMIT.#); 27
PRE --CONSTRUCTION NOTIFICATION APPLICATION
FOR NATIONWIDE PERMITS THAT REQUIRE:
1) NOTIFICATION TO THE CORPS OF ENGINEERS= ????
2) APPLICATION FOR SECTION 401 CERTIFICATION
3) COORDINATION WITH THE NC DIVISION OF COASTAL MANAGE:`ENT
SEND THE ORIGINAL AND (1) COPY OF THIS COLLETED FORM TO THE APPROPRIATE
FIELD OFFICE OF THE CORPS OF ENGINEERS (SEE.AGENCY ADDRESSES SHEET) SEVEN
(7). COPIES SHOULD BE SENT TO THE N.C. DIVISION OF ENVIRONMENTAL MANAGEMENT
(SEE AGENCY ADDRESSES SHEET). PLEASE PRINT.
f
2• MAILING ADDRESS: 848 Liberty School Rd'
SUBDIVISION NAME:
CITY: State Road STATE: NC ZIP CODE: 28676
PROJECT LOCATION ADDRESS,-INCLUDING- SUBDIVISION NAME (IF DIFFERENT FROM
ILAILING ADDRESS ABOVE)
3. TELEPHONE, NUMBER (HOME)•(336)874-7317 (WORK) : (336)874-2194
4. IF APPLICABLE: AGENT'S NAME OR RESPONSIBLE CORPORATE OFFICIAL, P.DDRESS,
PHONE NUMBER:
5• LOCATION OF WORK (PROVIDE A MAP, PREFERABLY A COPY OF USGS TOPOGRAPHIC
MAP OR AERI1L PHOTOGRAPHY WITH SCALE)
COUNTY: _Surry NEAREST TOWN OR CITY: Mountain ark
1
PAYMENT
RECEIVED
DEM ID: CORPS ACTION ID:
NATIONWIDE PERMIT REQUESTED (PROVIDE NATIONWIDE PERMIT #); 27
PRE--CONSTRUCTION NOTIFICATION APPLICATION
FOR NATIONWIDE PERMITS THAT REQUIRE:
1) NOTIFICATION TO THE CORPS OF ENGINEERS
2) APPLICATION FOR SECTION 401 CERTIFICATION
3) COORDINATION WITH THE NC DIVISION OF COASTAL MANAGEMENT
SEND THE ORIGINAL AND (1) COPY OF THIS COMPLETED FORM TO THE APPROPRIATE
FIELD OFFICE OF THE CORPS OF ENGINEERS (SEE.AGENCY ADDRESSES SHEE.T)..SEVEN
(7).COPIES SHOULD BE SENT TO THE N.C..DIVISION OF ENVIRONMENTAL MANAGEMENT
(SEE AGENCY ADDRESSES SHEET). PLEASE PRINT.
1. OWNERS NAME Bob Cockerham
2. MAILING ADDRESS: 1700 .Star.ita Road
SUBDIVISION NP.ME.
CITY: ._C ha-lbtte STATE: NC, ZIP CODE: 28206
PROTECT LOCATION ADDRESS,-INCLUDING-SUBDIVISION NAME (IF DIFFERENT FROM
MAILING ADDRESS ABOVE):
848 Liberty School Road; State Road NC 28676
3. TELEPHONE NUMBER (HOME) :(704) 483-2069 (WORK) : (1-04) 596-8900-
4. IF APPLICABLE: AGENT'S NAME OR RESPONSIBLE CORPORATE OFFICIAL, ADDRESS,
PHONE NUMBER:
5. LOCATION OF WORK (PROVIDE A MAP, PREFERABLY A COPY OF USGS. TOPOGRAPHIC
MAP OR AERIAL PHOTOGRAPHY WITH SCALE):
COUNTY: NEAREST TOWN OR CITY: Mountain Park
1
lip
SPECIFIC LOCATION (INCLUDE ROAD
NUMBERS, LANDMARKS,'ETC.): West on SR I'll';_fr rk. Left on
RR• 1 11 6 _ (;n 1.9 mi 1 Pc to nn,ihl e Red ('oro gg R 81t _T? nils oao_ fi,P?
to bottom of hill. Turn left drive along fence line to walk through=_
gate.
6. IMPACTED OR NEAREST STREAM/RIVER: South Fork Mitchell River
RIVER BASIN: Yadkin
7a. IS PROJECT LOCATED NEAR WATER CLASSIFIED AS TROUT, TIDAL SALTWATER
(SA), HIGH QUALITY WATERS (HQW), OUTSTANDING RESOURCE WATERS (ORW), WATER
SUPPLY (WS-I OR WS-II) ? YES [X] NO [ ] IF YES, EXPLz:IN:
_The North Pron South Fork' G2vinraa 1 Ps" I,= stream hn s Tr nut-de 4 gap tion
7b. IS THE PROJECT LOCATED WITHIN P, NORTH CAROLINA DIVISION OF COASTAL
MANAGEMENT AREA. OF ENVIRONMENTAL CONCERN (AEC)? YES [ ] NO [X]
7c. IF THE PROJECT IS LOCATED WITHIN P_ COASTAL COUNTY (SEE PAGE •7 FOR
LIST OF COASTAL COUNTIES), WHAT IS THE LAND USE PLAN.(LUP) DESIGNATION?
8a. HAVE ANY SECTION 404 PERMITS BEEN PREVIOUSLY REQUESTED FOR USE ON
THIS PROPERTY? YES [ ] NO [X] IF YES, PROVIDE ACTION I.D. NUMBER'OF
PREVIOUS'PERMIT AND ANY ADDITIONAL INFORMATION (INCLUDE PHOTOCOPY OF 401
CERTIFICATION):
8b. ARE ADDITIONAL PERMIT REQUESTS EXPECTED FOR THIS PROPERTY IN THE
FUTURE? YES [ ] NO [X] IF YES, DESCRIBE ANTICIPATED WORK:
9a. ESTIMATED TOTAL NUMBER OF ACRES IN TRACT OF LAND:
80
9b. ESTIMATED TOTAL NUMBER OF ACRES OF WETLANDS LOCATED ON PROJECT SITE:
0
2
10a. NUMBER OF ACRES OF WETLANDS IMPACTED BY THE PROPOSED PROJ
ECT BY:
FILLING:'
EXCAVATION:
FLOODING:
OTHER:
DRAINAGE:
TOTAL ACRES TO BE IMPACTED: 0
10b. (1) STREAM CHANNEL
RELOCATED TO BE IMPACTED BY THE PROPOSED PROJECT (IF
, PROVIDE. DISTANCE BOTF. BEFORE AND AFTER RELOCATION) :
LENGTH BEFORE: 570 FT AFTER:
FT
WIDTH BEFORE (based on normal high water contours): 75
1
7
7
WIDTH AFTER: 7-1
AVERAGE DEPTH BEFORE: 2.0 FT AFTER: 3.1
(2) STg7Pv, CHr?`;NEL "-fPACTS WILL RESULT FROM: (CHECK ALL Tr
aT ?IAPPLY)
OPEN CHANNEL RELOCATION: PLACEMENT OF PIPE IN
Cr.'c-N_IEL
CH?VNEL EXCAVATION:
CONSTRUCTION OF A DAM/FLOODING:
OTHER: _ -Ad justments in dimension and profile
11. IF CONSTRUCTION OF P_
WATERSHED POND IS PROPOSED, WHAT IS THE SIZE
OF
DRAINING
TO THE POND?
WH T IS THE _EXPECTED POND SURFACE AREA?
12. DESCRIPTION OF PROPOSED WORK INCLUDING DISCUSSION OF TYPE OF
MECF?.NICP_L EQUIPMENT TO BE USED (ATTACH PLANS: 8 1/2 X 11
ONLY : DRAWINGS
Track hoes wti'11 hP used to install rocs van,-, I unm ys
root wads and to build a bankfull bench. See
0
Erosion control fabric and bioenai
neerina r
stabilize slopes,
13. PURPOSE OF PROPOSED WORK: ,Ac+rirPCC hank Prnc; n
Il Td-?}-? F ?•} ran t r; h?? t 8 S
400-600 tons/year of sediment Restore riparian buff
ar any a
at
hafi? a
3
14. STATE REASONS WHY IT IS BELIEVED THAT THIS ACTIVITY MUST BE CARRIED
OUT IN WETLANDS. (INCLUDE ANY MEASURES TAKEN TO MINIMIZE WETLAND
IMPACTS): NA
15. YOU-ARE REQUIRED TO CONTACT THE U.S. FISH AND WILDLIFE SERVICE
(USFWS) AND/OR-,NATIONAL' MARINE FISHERIES SERVICE (N-MFS) (SEE AGENCY r?C
ADDRESSES SHEET) REGARDING THE. PRESENCE OF ANY FEDERALLY LISTED OR t?
PROPOSED FOR LISTING'ENDPNGERED OR THREATENED SPECIES OR CRITICAL HABITAT
IN THE PERMIT AREA THAT-MA-Y-BE-AFFECTED BY THE PROPOSED PROJECT. DATE
CONTACTED: (ATTACH RESPONSES
FROM THESE AGENCIES.)
16. YOU ARE-IZEQUI-R£-D T-0.-CONTP_CT THE STATE HISTORIC-pRE.SERVAT-LCN-OgFICER
(SHPO) (SEE AGENCY P_DDRFS-SES__SHEET) - -REGARDING THE PRESENCE OF HISTORIC
PROPERTIES-- N-T pE rT AREA -WHICH MAY BE AFFECTED BY THE-'PROPOSED
PROJECT. DATE CONTACTED:-
17. DOES THE PROJECT INVOLVE AN EXPENDITURE OF PUBLIC FUNDS OR THE USE OF
PUBLIC (STATE) LAND?
YES K] NO • [ ] (IF NO, GO TO 18)
a. IF YES, DOES THE PROJECT REQUIRE PREPARATION OF AN ENVIRONMENTAL
DOCUMENT PURSUANT TO THE REQUIREMENTS OF THE NORTH CAROLINA ENVIRONMENTAr,
POLICY ACT?
YES (] NO N
b. IF YES, HAS THE DOCUMENT BEEN REVIEWED THROUGH THE NORTH CAROLIN?.
DEPARTMENT OF ADMINISTRATION STATE CLEARINGHOUSE?
YES [ ] NO [ ]
IF ANSWER TO 17b IS YES, THEN SUBMIT APPROPRIATE DOCUMENTATION FROM THE
STATE. CLEARINGHOUSE TO DIVISION OF ENVIRONMENTAL MANAGEMENT REGARDING
COMPLIANCE WITH THE NORTH CAROLINA ENVIRONMENTAL POLICY ACT.
QUESTIONS REGARDING-THE STATE CLEARINGHOUSE REVIEW PROCESS SHOULD BE
DIRECTED TO MS. CHRYS BAGGETT, DIRECTOR STATE CLEARINGHOUSE, NORTH
CAROLINA DEPARTMENT OF ADMINISTRATION, 116 WEST JONES STREET, RALEIGH,
NORTH CAROLINA 27603-80031 TELEPHONE (919) 733-6369.
4
DEPARTMENT OF THE INTERIOR
GEOLOGICAL SURVEY
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Copyright (C) 1997. Maptech, Inc.
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s
USDA United States Natural Resources P. O. Box 218
?- Department of Conservation Dobson, NC 27017
® Agriculture Service Service Telephone: 336-386-8751336-386-8751
January 23, 2001
To: John Thomas, Permit Coordinator
Raleigh-Office, U.S. Army Corps of Engineers 2OOI
7k7
From: J.
har Everhart, Dis nct Conservationist
Subject: Bob Cockerham, Eddie Harris Stream Restoration
I am working with Bob Cockerham and Eddie Harris to stabilize eroding streambanks,
establish. a wooded riparian buffer and restore appropriate dimension, pattern and profile
to an unstable reach of the South Fork Mitchell River. This project will reduce sediment
from streambank erosion that has been measured at 400-600 tons per year for this
reach and improve aquatic habitat by reestablishing an appropriate pool riffle sequence.
The project will consist of establishing a bankfull channel, modifying the streambed to
establish appropriate depth and spacing for pools and riffles, using in stream structures,
erosion control fabric and bioengineering to stabilize the channel and streambanks and
planting trees and shrubs to reestablish a riparian buffer. This project has been designed
by NRCS as part of a larger project to address water quality issues in the Mitchell River
watershed.
If you need additional information or have questions about the proposed project please
contact please give me a call.
Cc: John Dorney, DWQ
U10103
Eddie Harris and Bob Cockerham Site
South Fork Mitchell River
Stream Restoration
Estimated Material Quantities
JAN 5 200f
• Estimated excavation quantity 1,000 Cu. Yds.
• Estimated earthfill quantity 500 Cu. Yds.
• Rock cross vane 55 tons
(Rock dimensions: 4 ft. long x 3 ft. wide x 2 ft. high within +/- 1 ft.
See Construction Specification: Rock Structures)
• 3 J-Hook Vanes 95 tons
(Rock dimensions: 4 ft long x 3 ff wide x 2 R high within +/- 1 ft.
See Construction Specification: Rock Structures)
• Root wads with attached bole (trunk) 3-5 each
-Use root wads stockpiled on site
• Footer logs - to be harvested on site 3-5 each
• Brushmattress 4 ft. x 155 ft. = 620 sq. ft.
• Fascine (8-10" diameter) 155 linear ft.
• Contour Brushlayering - 3 layers per lin. ft. 200 linear ft.
• Dead Stout Stakes 250 each
• Live stakes or transplanted seedlings - With 4 rows that are
500 feet long and 2 ft. spacing in rows, there will be
250 live stakes or seedlings per row. 1,000 each
• North American Green SC 150BN erosion control blanket
(or equivalent) 480 sq. yds. 6 rolls
• Ecostakes 250 each
• 12 gauge wire 1 roll
• Bailing twine 1 roll
MORPHOLOGICAL CHARACTERISTICS OF THE EXISTING AND PROPOSED
CHANNEL WITH GAGE STATION AND REFERENCE REACH DATA
(Rosgen, 1996)
Restoration Site (Name of stream & location): Eddie Harris & Bob Cockerham properties, S. Fork Mitchell R.
USGS Station (No. & location): Mitchell River near State Road, NC - Sta. No. 02112360
Reference Reach (Name of stream & location): North Fork New River near Creston, NC and Basin
Creek just below confluence of Basin & Cove Creeks, Wilkes County
VARIABLES EXISTING PROPOSED USGS Reach REFERENCE
CHANNEL REACH Sta. Reference REACH
N. Fork
New River Basin Creek
1. Stream type B5c C4/C3 C C3 I
2. Drainage area 17.5 17.5 78.80 29.0 7.2
(s q. mi.)
3. Bankfull width 6/9199 Survey data 52.3 1 Mean: 33.2
(Wbkf) at Sta. 8+97 50.4 77.0
75.0 ft. 46-61 Range: 29.5-36.9
14. Bankfull mean 4.9 3.2 Mean: 2.1
depth (dbkf) 2.0 ft. 3.1 (3.05)
3-3.4
Range: 1.9-2.2
5. Width/depth 16.3 Mean: 16.4
ratio (Wb,f/db,d) 37
5 16.5 15.7
. 13.5-18.5 Range: 13.4-19.4
6. Bankfull cross- 168.8 Mean: 68.4
sectional area 150.7 ft2 154 377.0
i (Abu) 149.5- Range: 64.9-71.9
199.5
7. Bankfull mean
velocity (vbkf) 5.6 ft/sec 5.5 7.1 5.9 5.5
8. Bankfull
discharge, cfs 850 850 2,681 1,000 375
Qbkf
9. Bankfull Mean: 4.6 6.2 4.5 Mean: 3.1
Maximum depth 3.3 ft.
(dmax) Range: 3.7-5.3 4.1-4.9 Range: 3.0-3.2
10. Max driff/dbw ratio 1.65 Mean: 1.5 1.3 1.4 Mean: 1.5
Range: 1.2-1.7 1.2-1.6 Range: 1.4-1.7
11. Low bank height 2.0 1.0 1.5 1.0 Mean: 1.2
to max. dbkfratio Range: 1.0-1.3
12. Width of 125.5 Mean: 125 224 235.3 Mean: 329
flood prone area (eased on site conditions)
H/f a Range: 111-152 138-412 Range: 329
13. Entrenchment 1.7 Mean:2.5 2.9 4.6 Mean: 8.9
ratio wf wbkf Range:2.2 - 3.0 2.3-8.2 Range: 8.9
14. Meander length Mean: 817 1005 Mean: 350
(?) Range: 529-1109 960-1050 Range: 350
VARIABLES EXISTING PROPOSED USGS REF= REFERENCE
CHANNEL REACH STA. REACH REACH
15. Ratio of Mean: 16.2 19.2 Mean: 10.5
meander length
to bankfull Range: 10.5-22 15-22 Range: 10.5
width Lm/wbId
16. Radius of Mean: 76 1.5 Mean: 51.2
curvature (R,)
Range: 45-106 0.9-2.1
Range: 40.1-69.3
17. Ratio of radius Mean: 1.5 1.0 Mean: 1.5
of curvature to
bankfull width Range: 0.9-2.1 0.9-1.5 Range: 1.2-2.1
R./wbkf
18. Belt width (wbn) Mean: 101 254 Mean: 64.7
Range: 91-287 192-300 Range: 59-75
19. Meander width 2.0 4.9 ( Mean: 1.9
ratio (wbg/wbld)
Range: 1.8-5.7 3.7-5.7
Range: 1.8-2.3
20. Sinuosity 1.3 1.3 -r1.2 1.5 ? K=953 = 1.2
(stream length/ 813
valley distance)
k
21. Valley slope 0.00651 0.0065 0.007 j Svaliey = k (sav9)
(ft/ft) = 0.01724
22. Average slope 0.00407 0.0048 0.00295 0.0048 1 0.01437
Sav = Svalle k
23. Riffle slope Mean: 0.01 0.0083 Mean: 0.0208
(SrO Range: 0.0065-
0.013 Range: 0.018-0.038
24. Ratio of riffle 2.0 1.7 Mean: 1.4
slope to avg.
slope s,W sa Range: 1.3-2.6 Range: 1.3-2.6
25. Pool slope Mean: 0.0005 .000289 -0.00001 Mean: 0.0019423
(sw.,)
Range: 0.0 - 0.002 Range: 0.00-0.00588
26. Ratio of pool Mean: 0.1 0.01 0 Mean: 0.1
slope to
average slope Range: 0.0 - 0.4 - Range: 0 - 0.4
S I/Sbkf
27. Maximum Mean: 7.1 7.8 Mean: 4.8
pool depth
(dam,) Range: 6.2-7.8 7.5-8 Range: 4.1-5.2
28. Ratio of pool Mean: 2.3 2.4 Mean: 2.3
depth to
average Range: 2.0 - 2.5 Range: 2.0-2.5
bankf
ull depth
l!
(d Mdbkf)
29. Pool width Mean: 76 50.9 Mean: 50.3
(wpool)
Range: 50 -106 50.7-51 Range: 35 - 68
Design by: Angela G. Jessup Page 2 of 4 8/9/99 Revised 11/14/00
VARIABLES EXISTING PROPOSED USGS REF REFERENCE
CHANNEL REACH STA. REACH REACH
30. Ratio of pool Mean: 1.5 1.0 Mean: 1.5
width to
bankfull width Range: 1.0 - 2.1 Range: 1.1-2.1
W Mbkf
31. Pool Area Mean: 231 174.5 Mean: 109.6
(Ap.1)
Range: 154-293 138.2- Range: 89.3-132.5
210.7
32. Ratio of Pool Mean: 1.5 1.0 Mean: 1.6
Area to Bankfull
Area Range: 1.0 -1.9 1.0-1.3 Range: 1.3 -1.9
33. Pool to pool Mean: 383 610 320.5 Mean: 305
spacing (p-p)
Range: 212-509 222-414 Range: 271-334
34. Ratio of p-p Mean: 7.6 7.9 6.1 Mean: 9.2
spacing to
bankfull width Range: 4.2-10.1 4.2-7.9 Range: 8.1-10.1
- /Wbkf
MATERIALS:
1. Particle Size
Distribution of
Channel
Material
i
D16 0.34 mm 0.25 0.17 mm
D 35 18 35 29
D 50 34 75 58
D 84 100 362 180
D 95 256 2600 300
2. Particle Size
Distribution of
Bar Material
D 16 20
D 35 70
D 50 .84
D 84 110
D 95 115
Design by: Angela G. Jessup Page 3 of 4 8/9/99 Revised 11/14/00
VARIABLES EXISTING PROPOSED USGS REF REFERENCE
CHANNEL REACH STA. REACH REACH
Largest size 120 mm
particle at the toe
lower third of bar
SEDIMENT TRANSPORT VALIDATION
(BASED ON BANKFULL SHEAR STRESS)
Calculated value (Ib/ ) 1.7
Entrainment Particle Size from Shields Diagram
Relation adjusted to include field data 120mm - 450 mm
Critical dimensionless shear stress 0.66
Minimum mean db,f calculated using critical
dimensionless shear stress equations
n/a
Mannin s "n" 0.037
Remarks: The completion of the project will reduce the amount of sand available in the stream
due to the reduction in bank erosion; therefore, the d5o of the bar sample was used to predict
the resultant channel materials for the proposed channel design. The d50 of the rehabilitated
stream reach will be close to the break between gravel and cobble.
Design by: Angela G. Jessup Page 4 of 4 8/9/99 Revised 11/14/00
Eddie Harris/Bob Cockerham Design Reach
South Fork Mitchell River - Surry County, NC
Design by: Angela G. Jessup Checked by:
Date: 8-5-99 I'- - + 5 Date:
• Drainage Area = 17.5 sq. mi.
• From the NC Rural Piedmont Regional Curve:
Q = 850 cfS (Note: point adjusted above regional curve to correlate with the Mitchell River and Fisher points)
• From reference reach data (RR data): W/D range = 13.4 to 19.4
1. Try w/d = 15
wbkf _ (160)(15) = 49.0 ft.
2. Calculate dbkf
dbkf wkf = 49.0 ft. = 3.3 ft.
w/d 15
3. Calculate mean bkf velocity:
Vbkf = Q = 850 cfs = 5.3 ft/sec
A 160sgft
4. Calculate sinuosity based on proposed layout
k = 565 ft = 1.3452 Use 1.3
420
5. Calculate average slope
Valley slope = 2.0 ft = 0.00651
307 ft
savg = valley slope = 0.00651 = 0.00484 = 0.0048
K 1.3452
6. Calculate riffle slope
From RR data: §.,if = 1.4 Range = 1.3 to 2.6
savg
Use 2.0
AGJessup Page 1 of 6
8/9/99 Revised 11114/00
Sdf = 2.0 (0.005) = 0.01
Range: srif = 0.0065 to 0.013
7. Calculate bankfull shear stress
Tbkf = "f Rsfacet where R = A A=160 sq. ft.
P P=2dbkf+wbkf=2(3.3)+49.0=55.6ft
R=160sgft =2.88 ft.
55.6 ft.
Tbkf = (62.4 Ib/ft3)(2.88 ft)(0.01 ft/ft) = 1.8 Ib/ft2
From Shields Diagram (The Reference Reach Field Book, p. 190):
The largest particle that can be moved when r 1.8 Ib/ft2 is 500 mm. The largest
particle that was found on the lower 1/3 of the point bar of the existing channel is
120 mm. Therefore, the proposed channel is competent to move the sediment
available for transport.
8. Validate the sediment transport:
Tci = 0.0834 (d;/dso) -4.872 where tic; = critical dimensionless shear stress
d, = d50 from pebble count of channel materials
and
Tci = ds d5o = d50 from bar sample or sub-pavement
( S-- 1)D s = slope (avg dsn slope)
S = specific gravity of sediment (usually 2.65)
D = particle diameter to be moved
(largest particle found on lower 1/3 of point bar)
d,=34 mm=0.11147 ft.
305 mm/ft
d6o = 84 mm = 0.27541 ft.
305 mm/ft
Tci = 0.0834 x0.11147 -0.872 = 0.1835
L 0.27541 J
Tc; = ds d = Tc S-1 D
(S-1)D s
D = 120 mm = 0.39344 ft.
305 mm/ft
d = 0.1835 (2.65-1)(0.39344) = 23.8 ft. => Results are unreasonable: therefore, this
0.005 approach is not valid. Try a different equation.
AGJessup
Page 2 of 6
8/9/99 Revised 11/14/00
Check velocity:
u = v = mean velocity u* = shear velocity
D84 = 100 mm (from pebble count)
305 m m/ft
D84 = 0.32787 ft.
Ratio of dbkf = 3.3 ft. 10.1
D84 0.32787 ft
Ref: The Reference Reach Field Book, DLR Wildland Hydrology, 1998, p. 188.
From chart: Resistance (friction) factor u = 8.6
u*
u* = g s where g = gravitational acceleration = 32.2 ft/sec2
R = hydraulic radius - since w/d < 20, R A/P
s = avg. slope = 0.005
u* _ (32.2 ft/sec2)(2.88 ft.)(0.005)
u* = 0.681 ft./sec
u/u* 8.6
u = 8.6(0.681 ft/sec)
u 5.9 ft/sec .•. Solution no good (ng) since dsn velocity = 5.3 fUsec
Try new design solution. Start with Step #1:
1. Try design velocity of 5.5 ft./sec and w/d of 16.5:
A = 850 cfs = 154 fl?
5.5 ft/sec
wbkf = (154)(16.5) = 50.4 ft.
2. Calculate dbkf
dbkf = wbkf = 50.4 ft. = 3.05 ft.
w/d 16.5
AGJessup Page3 of 6
8/9/99 Revised 11/14/00
1
3. Check bankfull shear stress
ibkr = 7Rsfacet where R = A A=154 sq. ft.
P P = 2 dbkf + wbkf = 2 (3.05) + 50.4 = 56.5 ft
R=154sgft.=2.73 ft.
56.5 ft.
tbkf = (62.4 Ib/ft3)(2.73 ft)(0.01 ft/ft) = 1.7 lb/fl?
From Shields Diagram (The Reference Reach Field Book, p. 190):
When T = 1.7 Ib/ft2, the stream can entrain particles from 120 mm to 450 mm. The
largest particle that was found on the lower 1/3 of the point bar of the existing
channel is 120 mm..'. ok
4. Validate the sediment transport
Check velocity using a different equation:
u = 2.83 + 5.75 Log (d/D84)
u*
U = [2.83 + 5.75 Log (d/D84)]u
u* = gRs (32.2)(2.73)(0.005) = 0.68
U = [2.83 + 5.75 Log (3.05/0.33)] (0.66)
u = 8.38 (0.66)
u = 5.5 ft/sec .•. Design okay
Calculate Mannings "n"
n = 1.486 Rya s'2 = 1.486 (2.73) (0.005)' =0.037
u 5.5
5. Calculate max dbkf@ riffle:
From RR data: d_ma,.ratio= 1.2 to 1.7 Mean 1.5
dbkf
Riffle dmax = dmax ratio x dbkf = 1.5 (3.1 ft) = 4.6 ft.
dbk
Range: Riffle d. = 3.7 to 5.3 feet
AGJessup Page 4 of 6
8/9199 Revised 11/14/00
6. Calculate meander wavelength
From RR data: Lm ratio = 10.5 -22 Mean = 16.2
Wbkf
Lm = Lm ratio x Wbkf = 16.2 (50.4 ft.) = 817 ft.
Wbkf
Lm can range from 529 to 1109 feet.
7. Calculate Rc
From RR data: Rdwbkf ratio = 0.9 to 2.1 Mean = 1.5
Rc = Rdwbkf ratio X Wbkf = 1.5 (50.4 ft) = 75.6 ft. Use 76 feet
Rc can range from 45 to 106 feet.
8. Calculate belt width
From RR data: MWR = 1.9 Range = 1.8 to 5.7
Try MWR = 2
Wbeft = MWR (Wbkf) = 2 (50.4) = 101 feet
Wbelt can range from 91 to 287 feet.
9. K = 1.3
Valley slope = 2.0 ft/307 ft = 0.0065
Avg. s = valley slope/k = 0.0050
s?f = 0.01 ft/ft Range shf = 0.0065 to 0.013
10. Calculate pool slope
Spool = spool ratio x savg
savg
From ref. reach data: Range spool ratio = 0.0 to 0.4 Mean = 0.1
spoor = 0.1 x 0.005 = 0.0005
spool range = 0.00 to 0.002
AGJessuP Page 5 of 6
8/9/99 Revised 11/14/00
y
11. Calculate max pool depth
From RR data: Range max doaoi ratio = 2.0 to 2.5 Mean = 2.3
dbkf
Min value: max dpoo, = 2.0 x 3.1 ft. = 6.2 ft.
Mean value: max dPoo, = 2.3 x 3.1 ft. = 7.1 ft.
Max value: max dPooi 2.5x 3.1 ft. = 7.8 ft.
12. Calculate pool-to-pool spacing
From RR data: P-P spacing = 7.6 (mean) Range = 4.2 to 10.1
Wbkf
P-P spacing = 7.6 (50.4 ft) = 383 ft
Range: P-P spacing = 212 to 509 feet
13. Calculate pool width
Ratio w ool = 1.5 Range = 1.0 - 2.1
Wbkf
Mean: Pool width = 1.5 (50.4 ft) = 76 ft
Range: Pool width = 50 to 106 feet
14. Calculate pool area
Mean: Ratio Pool Area = 1.5 Range 1.0 to 1.9
Abkf
Pool Area = 1.5 (154 ft2) = 231 ft2
Range: Pool Area = 154 to 293 ft2
AGJessup Page 6 of 6
8/9/99 Revised 11/14100
Eddie Harris and Bob Cockerham Site
South Fork Mitchell River
STREAM RESTORATION
SPECIFICATIONS
TABLE OF CONTENTS
TYPE TITLE
CONSTRUCTION Bioengineering
NRCS-NC
Erosion Control Blanket
Pollution Control
Rock Structures
Root Wad System
Streamside Seeding
1
12/01/00
? r
CONSTRUCTION SPECIFICATION - BIOENGINEERING
GENERAL
The work shall consist of furnishing all labor, materials, and
equipment including the harvesting of materials for the
construction of a bioengineering installation as required by
the drawings and specifications. The installation may include
a combination of the following bioengineering practices:
contour brushlayering, fascines, brushmattress, live stakes
and transplanted live plant materials.
MATVRTAT.R
All cut materials shall be freshly obtained from live plants
during the dormant season. The woody plants or vegetation to
be transplanted shall have vigorous root systems. All plants
shall have normal, well-developed branches. When possible,
plant materials should be selected from locally available
native species. The fresh dormant cuttings of willows, silky
dogwood or other specified materials shall be harvested from
within the work limits or from a nearby-designated source. The
materials shall be harvested within one (1) week of
installation. The collected materials shall conform to the
American Association of Nurserymen Standards for collected'
material. The cut and transplanted materials shall be stored
in a cool, moist condition until installed. All plant
materials shall be installed or planted above the normal water
line with the buds planted in the direction of growth (usually
up).
Cuttings - The fresh cuttings and branches shall be at least
250 longer than the width needed for installation. The plant
material should be 1-? to 2 inches in diameter unless being used
for live stakes. Materials for live stakes shall be 1 to 3
inches in diameter and 18 to 36 inches in length. The basal
end should be cut at an angle or point. The bark should be
left intact. Live stakes should be driven in the ground to a
minimum depth of 3 inches above the ground (or to refusal)
with a wooden or rubber mallet.
Bare Root Transplanted - Bare root materials to be
transplanted shall be dug so that the major portion of the
root system and attached soil, including fibrous roots, remain
intact. Any roots that are broken or which must be cut shall
be cleanly cut. The roots shall be protected at all times to
prevent injury or drying caused by heat, sun, wind and
freezing temperatures.
NRCS-NC Page 1 of 6 8/98
Bioengineering Installation AGJ-p
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EXCAVATION
This work shall consist of the excavation of the existing
channel to restore the channel dimensions or add a bankfull
bench and to grade the channel bank to a positive slope for
the bioengineering installation. The work shall be completed
as shown on the drawings, as described in this specification
and as staked by the Engineer. Excavation shall bottom on
bedrock when it lies above the lines and grades shown on the
drawings. Excavation into bedrock is not required or allowed.
Suitable earthfill material from the required excavation shall
be used in the bioengineering installation. Excavated
material suitable for use, as earthfill, will be stockpiled
adjacent to the work area. The Contractor shall remove-and
dispose of all debris encountered, including but not limited
to, trash, stumps, and concrete rubble. The Contractor shall
dispose of all unsuitable or excess material at sites of his
own choosing away from the work site.
Any accumulation of sediment in the channel shall be cleaned
as needed during construction and at the end of construction.
No separate payment will be made for this clean-up work.
Known utility locations are shown on the drawings but may hot
be all-inclusive. The Contractor shall be responsible for
verifying the location of all utilities prior to excavation.
The Contractor shall be responsible for repairing any damage
to existing structures or utilities.
EARTHFTLL
This work shall consist of the placement and compaction of the
earthfill or earth backfill to complete the bioengineering
installation as required by the drawings.and specifications.
Fill materials shall contain no frozen soil, sod, brush,
'roots, rocks over six (6) inches in diameter, or other
objectionable materials. The placing and spreading of fill
shall be started at the lowest point of the foundation and
shall be brought up in approximately horizontal layers.
Sloughed areas in the slope shall be corrected by shaping the
slope to provide a uniform subgrade for the bioengineering
installation. The source of earthfill shall be the required
shaping of the slope unless otherwise approved by the
Engineer.
The moisture content of the fill material shall be maintained
as high as attainable within the limits required to:
NRCS-NC Page 2 of 6 8/98
Bioengineering Installation AGJ-p
? Prevent bulking or dilatance of the material under the
action of the hauling or compacting equipment;
? Prevent the adherence of the fill material to the treads
and tracks of the equipment;
? Ensure the crushing and blending of the soil clods and
aggregations into a reasonable homogeneous mass. Fill
shall not be placed which is so dry that a sample will not
remain formed after squeezing in the hand.
The maximum thickness of a layer before compaction for hand
placed and compacted material shall be 4 inches and*for
machine placed and compacted material shall be 9 inches. Each
layer of earthfill shall be compacted to a density equivalent
to that of the surrounding in-place materials. Compaction
shall be accomplished by means of manually directed power
tampers, walk-behind or self-propelled rollers, or by tamping
with the bucket of a hydraulic excavator with a minimum
operating weight of 42,000 lbs. and a minimum bucket force of
25,000 lbs. unless otherwise approved by the Engineer.
CONTOUR BRUSHLAYERING
This item shall consist of all work, including harvesting and
transporting materials, necessary to install contour
brushlayering as shown on the drawings or described below for
the purpose of restoring the streambank with a bioengineering
installation. Contour brushlayering consists of embedding cut
live branches of tree or shrub species on successive
horizontal contours or benches (in lifts) on the face of the
streambank.
The foundation for the contour brushlayering shall be stripped
to remove any unsuitable materials or shall be excavated as
specified. The foundation surface shall sloped toward the
bank on a 5 to loo grade. The foundation shall be inspected
and approved by the Engineer prior to the installation of the
contour brushlayering. A minimum twelve(12) inch layer of
compacted backfill shall be placed above the.fascine prior to
installation of the first brushlayer. The backfill shall be
placed as specified above in Earthfill.
Brush layer cuttings shall be placed on the foundation or.
backfill layer with the butt ends stuck into the undisturbed
bank material. The butt ends should be angled slightly down.
The branches should be spaced no more than 8 to 12 inches
apart. The branches should be layered to a thickness of 3 tc
6 inches. The branch placements should result in some
crisscrossing of the stems.
NRCS-NC Page 3 of 6 8/98
Bioengineering Installation AGJessup
;'
A thin layer.of earthfill shall be placed over the brush layer
and firmly hand-tamped to fill the voids between the branch
stems. Water packing of the soil in the voids may used with
the approval of the Engineer. After filling the voids in the
brush layer, a layer of compacted earthfill shall be placed in
accordance with the above requirements for Earthfill.
Earthfill shall be obtained as specified above in Excavation
and Earthfill.
Successive.alternate layers of brush and compacted earthfill
shall be placed as shown on the drawing or directed by the
Engineer. The installation should be completed with a layer
of compacted earthfill and transplanted willows with attached
root mat.
FASCINES
This item shall consist of all work, including harvesting and
transporting materials, necessary to construct and install
fascines as shown on the drawings or described below for the
purpose of restoring the streambank with a bioengineering
installation. Fascines are made by packing live material
cuttings into continuous thick round bundles and fastening
them with bailing twine or wire. Fascines are typically made
from willow cuttings.
Cut materials should be long, straight, and flexible. The
minimum length of materials is 3 feet, but 6 or 7 feet is
preferred. The completed fascine should be a minimum of one
(1) foot longer than the longest whip (branch) in the bundle.
Whip butt ends should be randomly alternated. Bundles should
be tied every 10 to 15 inches with bailing twine. Every third
tie should also be secured with 12 gauge galvanized wire. The
compressed and tied bundle shall average eight (8) inches in
diameter.
The completed fascine should be placed in a freshly prepared
trench. The trench shall be ten (10) inches wide and six (6)
inches deep. Fascines should be keep cool and moist until
placed in the trench. Fascines shall be placed in the trench
with ends overlapping to provide a uniform thickness along the
length of the installation. Dead stout stakes 2 ;i? feet long
shall be driven through the bundle to secure the fascine in
place. The stakes shall be placed every three (3) feet. The
overlapping ends shall be staked between the last ties. The
dead stout stakes shall be fabricated by sawing a 2"x4" lumber
(Southern yellow pine or equivalent) on the diagonal to
produce two dead stout stakes. The fascine and staking shall
be inspected and approved by the Engineer prior to placement
of fill over the installation.
NRCS-NC
Bioengineering InsWlarion
Page 4 of 6
8/98
AGJ-p
f
Fascines shall be covered with soil and hand tamped to fill
the voids in the bundle. The process of covering the fascine
with soil should leave 10 to 20 percent of the top and/or
front of the fas.cine exposed and visible. Additional dead
stout stakes shall be placed below the fasciae for added
protection during high storm flows. The stakes shall be
placed every 5 feet.
BRUSHMATTRESS
This item shall consist of all work, including harvesting and
transporting materials, necessary to install a brushmattress
as shown on the drawings or described below for the purpose of
protecting the streambank with a bioengineering installation.
A brushmattress shall consist of placing a thick mat of cut
live branches of tree or shrub species on the face of the
streambank. The mat shall be staked and wired to hold the
branches in place, then the mat shall be partially covered
with soil. Dead stout stakes as described in the section on
Fascines, shall be used to anchor the brushmattress. Tie wire
shall be single strand, galvanized 12-gauge wire, or larger.
A fascine shall be installed at the base of the brushmattress
to anchor the base of the branches in place. The fascine
shall be placed in accordance with the above requirements for
Fascines.
A brushmattress shall be constructed when the plant species
are dormant. An 8- to 12-inch trench shall be dug just at or
below the water line and flush with the plane of the slope.
The brush shall be placed butt down in the trench with stems
laid perpendicular to the trench and against the bank. The
slope to be treated shall be covered from the top to the
bottom of the slope with the brush layer. Enough brush shall
be placed to ensure that the layer will be 4- to 6-inches
thick when compressed. When species with good rooting ability
are in short supply, other species can be substituted for up
to 50 percent of the materials. A single row of fascines
shall be placed in the dug trench to form the base of the
brushmattress and anchor the butt ends of the brush.
Stout dead stakes shall be driven into the brushmattress every
2 to 4 feet on center, beginning a foot beyond each horizontal
side of the mattress. The stakes shall be placed 1 foot
inside the mattress at the top and bottom. The stakes shall
be driven to within 6 or 8 inches of the soil surface before
tying down the mattress. The brushmattress shall be tied down
with wire in horizontal runs and then diagonal runs between
each horizontal row of stakes. The wire shall be wrapped
around the stakes in such a manner that if the wire between
NRCS-NC Page 5 of 6 8/98
Bioengineering bL4MIauon AGJessap
r y 7
two stakes breaks; the integrity of the remaining wiring will
remain intact. After tying, the stakes shall be driven into
the soil to compress the brushmattress and to place tension on
the wire. The staking and wiring shall be inspected and
approved by the Engineer prior to final driving of the stakes
and the placement of fill over the installation.
After the brush is placed, staked, tied and compressed, soil
shall be placed to cover the mattress. The soil shall be
worked into voids in the mattress to aid in the rooting
process. If the soil is dry, water should be used to help
pack the soil in the brushmattress.
LIVE STAKES
This item shall consist of harvesting and planting live stakes
cut from species that readily root such as willow species.
The stakes shall be 1 to 3 inches in diameter and 18 to 36
inches in length. Live stakes must be harvested and installed
while dormant.
The tops of the stakes shall be cut flat and the base
sharpened. The'stakes shall be driven into the ground to a
minimum depth of 3 inches above the ground (or to refusal)
with a wooden or rubber mallet. The live stakes shall be
planted on 2 x 2 feet spacing with a minimum of three
staggered rows when placed at the toe of the streambank. The
stakes should be placed slightly above the water line. All
live stakes placed above the toe area may be placed on 2 x 4
feet spacing. When stakes are planted in a near vertical
bank, the stakes should be angled into the bank rather than
planted straight into the bank.
TREE/SHRUB PLANTING (INCLUDING TRANSPLANTS)
Tree and shrub seedlings shall be planted on the shaped
streambank and in the riparian zone. Water-tolerant species
shall be planted on the streambank. Species suitable for the
soil and site conditions shall be planted in the riparian
zone. Species shall be as specified on the drawings unless
otherwise approved by the Engineer. Seedlings or transplanted
trees and shrubs shall be placed on 4 x 6 feet spacing on the
streambank. All plant materials in the work area that will be
disturbed by the construction operations shall be salvaged and
transplanted as directed by the Engineer.
NRCS-NC Page 6 of 6 8/98
Bioengineering Installation AGJ--p
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CONSTRUCTION SPECIFICATION
EROSION CONTROL BLANKET
The work shall consist of the installation of an erosion control blanket on the
channel side slopes and other areas disturbed by construction operations. The
work shall consist of furnishing, transporting and installing the erosion control
blanket in accordance with the plans and specifications.
Materials
The erosion control blanket shall be a machine-produced 100% biodegradeable mat
with a 70% agricultural straw and 30% coconut fiber blend matrix. The blanket shall
be of consistent thickness with the straw and coconut fiber evenly distributed over
the entire area of the mat. The blanket shall be covered on the top and bottom
sides with 100% biodegradeable woven natural organic fiber netting. The erosion
control blanket shall be SC150 BN as manufactured by North American Green or
equivalent.
Subarade Preparation
The subgrade surfaces on which the blanket is to be placed shall be cut or filled and
graded to the lines and grades shown on the drawings. Lime, fertilizer and seed
shall be applied in accordance with Construction Specification-Streamside Seeding
prior to installation of the blanket. The blanket shall not be placed until the prepared
subgrade has been inspected and approved by the Engineer.
Placement
The top edge of the blanket shall be anchored in a 6-inch deep by 6-inch wide
trench at the top of the slope. The trench shall be backfilled and compacted after
the blanket is fastened in the trench with staples or fasteners (i.e., Eco-Stake, Bio-
Stake). The blankets shall be placed with a minimum 12-inch overlap from one
section of blanket to the next section. The blanket shall be overlapped with the
upstream section overlapping the downstream section. The terminal end of the
blanket must be anchored in a 6-inch deep by 6-inch wide trench. The trench shall
be backfilled as noted above. The blanket shall be fastened with biodegradeable
fasteners such as Eco-Stakes or Bio-Stakes. The fasteners shall be installed in a
staggered pattern on 3-ft. spacing along the row and 2-ft. spacing between rows.
NRCS-NC Page 1 of 1 11/00
Erosion Control Blanket AGJessup
t Y
CONSTRUCTION SPECIFICATION
POLLUTION CONTROL
SCOPE
The work shall consist of installing measures or performing
work to control erosion and minimize the production of
sediment and other pollutants to water and air during
construction operations.
EROSION AND SEDIMENT CONTROL MEASURES AND WORKS
The measures and works shall include, but are not limited
to, the following:
Staging of Earthwork Activities - The excavation and moving
of soil materials shall be scheduled so that the smallest
possible areas will be unprotected from erosion for the
shortest time feasible.
Seeding - Seeding to protect disturbed areas in accordance
with the requirements of Construction Specification -
Streamside Seeding.
Mulching - Mulching to provide temporary protection of soil
surfaces from erosion in accordance with the requirements of
Construction Specification - Streamside Seeding.
Diversions - Diversions to divert water away from work areas
and to collect runoff from work areas for treatment and safe
disposition. These works are temporary and shall be removed
and the area restored to its original state when they are no
longer needed or permanent measures are installed.
Stream Crossings - Culverts or bridges where equipment must
cross streams. These works are temporary and shall be
removed and the area restored to its original state when
they are no longer needed or permanent measures are
installed.
Sediment Filters - Straw bale filters or geotextile sediment
fences to trap sediment from areas of limited runoff.
Sediment filters shall be properly anchored to prevent
erosion under them. These works are temporary and shall be
removed and the area restored to its original state when
they are no longer needed or permanent measures are
installed.
Waterways - Waterways for the safe disposal of runoff from
fields, diversions and other structures or measures. These
NRCS-NC Page lof2 2/99
Pollution Control AGJessup
F .?
works are temporary and shall be removed and the area
restored to its original state when they are no longer
needed or permanent measures are installed.
Other - All work necessary to control soil erosion and
minimize the introduction of sediment and other pollutants
to water and air during construction. All work shall comply
with the requirements of the North Carolina Sedimentation
Pollution Control Act and the National Pollutant Discharge
Elimination Act. Control of pollution shall apply to the
construction site along the stream. Pollution control for
any disposal site is the responsibility of the contractor
unless the area is within the work limits of the stream
protection project.
CHEMICAL POLLUTION
The Contractor shall provide watertight tanks or barrels or
construct a sump sealed with plastic sheets to be used to
dispose of chemical pollutants, such as drained lubricating
or transmission oils, greases, soaps, concrete mixer wash
water, asphalt, etc., produced as a by-product of the
construction work. At the completion of the construction
work, sumps shall be voided without causing pollution.
AIR POLLUTION
The burning of brush or slash or disposal of other materials
shall adhere to local and state regulations. Fire
prevention measures shall be taken to prevent the start or
the spreading of wild fires that result from project work.
All public access or haul roads used by the contractor
during construction of the project shall be sprinkled or
otherwise treated to fully suppress dust. All dust control
methods shall insure safe operations at all times. If
chemical dust suppressants are used, the material shall be a
commercially available product specifically designed for
dust suppression and the application shall follow
manufacturer's requirements and recommendations. A copy of
the product data sheet and manufacturer's recommended
application procedures shall be provided to the Engineer
five working days before use.
MAINTENANCE, REMOVAL, AND RESTORATION
All pollution control measures and works shall be adequately
maintained in a functional condition as long as needed
during the construction operation. All temporary measures
shall be removed and the site restored to as nearly original
conditions as practical.
NRCS-NC Page 2 of2 2/99
Pollution Control AGJessup
, x
CONSTRUCTION SPECIFICATION
ROCK STRUCTURES
The work shall consist of the construction of natural rock or rock riprap structures
including rock vanes, J-hook vanes, rock cross vanes, cross vane rock weirs, and/or
step-pool outlet structures. The work shall consist of furnishing, transporting and
installing materials to construct the rock structures in accordance with the plans and
specifications.
Materials
Individual rocks shall be dense, sound and free from cracks, seams, and other
defects. The rocks shall have a specific gravity of not less than 2.5. The size and
grading of the rock shall be as shown on the drawings. The dimensions of the rock
shall be 4 ft. long x 3 ft. wide x 2 ft. high. The dimensions may vary within +/- 1 foot.
Flat rocks are preferred since they are more adapted for the intended use. The
weight range of each rock should be between 1 and 3 tons. The source of rock
shall be identified and approved by the Engineer prior to delivery to the site. It is
anticipated that the rock will be a special order to obtain the specified sizes if the
rock is to be obtained from a quarry.
Subgrade Preparation
The subgrade surfaces on which the rock is to be placed shall be cut or filled and
graded to the lines and grades shown on the drawings. When fill is required, it shall
consist of approved materials that have been placed according to the Construction
Specification for Earthfill. The rock shall not be placed until the prepared subgrade
has been inspected and approved by the Engineer.
Placement
The rock shall be placed by equipment on the surfaces and to the depths specified.
The footer rock shall be placed first. If more than one footer rock layer is to be
placed, placement shall begin with the bottom layer and proceed in sequence until
all footer rock layers and the surface rock layer have been placed. A hydraulic
excavator equipped with a hydraulic thumb shall accomplish placement of the rock
in the structure unless otherwise approved by the Engineer.
The rock shall be placed in a manner to prevent damage to structures. Hand
placing will be required to the extent necessary to prevent damage to any structure.
All rock structures are designed to be installed on a 20- to 30-degree angle from the
channel bank toward the center of the stream. The grade, top and bottom, of the
structure gradually tapers down from the channel bank toward the center of the
stream. For the structure to work properly, the rock must be placed as shown on
the drawings unless directed otherwise by the Engineer.
NRCS-NC Page 1 of 1 2/99
Rock Structures AGJessup
? Y
v '
CONSTRUCTION SPECIFICATION
ROOT WAD SYSTEM
The work shall consist of furnishing all labor, materials and equipment for the
installation of a root wad system. The work shall include transporting and installing
the footer logs, rootwads, boulders, and excavation/earthfill needed to stabilize the
eroding streambank and enhance fish habitat. All work shall be done in accordance
with the plans and specifications. Construction operations shall be carried out in a
manner and sequence to minimize the impacts of erosion and sedimentation, air and
water pollution.
Materials
The root wad and bole (tree trunk) may be harvested from live trees or trees that
have been previously harvested. The trees shall be species that are resistant to
rotting. The root wad should have a good root system attached to a minimum 10-
foot long bole with a minimum diameter breast height (DBH) of 10 inches. The
length and diameter of the bole shall be as indicated on the drawings. Large trees to
be harvested for use as footer log and root Vwad revetments shall be clearly
marked prior to the start of construction. Footer logs shall also have a minimum
DBH of 10 inches and shall be a minimum of 10 feet in length.
The boulders or rocks shall be dense, sound and free from cracks, seams, and other
defects. The rocks shall have a specific gravity of not less than 2.5. The anchor
rocks shall weigh between 1 and 3 tons per rock.
SITE PREPARATION
The streambank protection shall begin at a stable location and end at a stable
location. The Engineer shall mark the beginning and ending points for each work
area in the field. Removal of any trees and brush shall be only to the extent
necessary to do the work. Obstruction to flow in the channel shall be removed only
as necessary to prevent stream flow from being directed toward unstable
streambanks. Any suitable materials removed as part of the site preparation may be
used in the project installation with the approval of the Engineer; otherwise, the
materials are to be stockpiled in an area designated by the landowner that is outside
the floodprone area. All site preparation shall be completed in a manner to avoid
damage to remaining trees and vegetation.
Existing sod shall be stripped from work areas and stockpiled for later use on
disturbed areas. The slopes shall be rough-graded to a positive, relatively uniform
slope. The slope shall be no steeper than a 1 '/ :1 slope except where necessary to
tie in with the existing undisturbed slopes.
NRCS-NC Page 1 of 2 11/00
Root Wad System AGJessup
e
INSTALLATION OF ROOT WAD SYSTEM
A footer log shall be installed at the toe of the eroding bank prior to the placement of
each root wad. The footer log shall be installed by excavating a trench or driving the
log into the toe of the bank, at a slight angle with the shoreline. The footer log shall
be placed to the anticipated scour depth.
The bole (tree trunk) of the root wad may be driven into place or installed in a dug
trench. When trenched, the trench shall be dug at the angle necessary for the root
wad to be installed perpendicular to the flow of the stream. The trench shall be
excavated wide enough to install the bole of the root wad and the same length as
the bole. The material removed during the excavation process shall be stockpiled
and used for backf Il. The root wad shall be installed with the bole in the trench so
that the tree's primary brace roots are flush with the toe of the streambank. The
roots in the root ball will be placed to extend into the stream. Along the length of the
eroded bank, the root wads with boles shall be placed to protect the streambank and
add fish habitat between each installed root wad. Each bole will be placed in a
separate trench. One or more large boulders shall be installed on top of the bole
near the intersection with the root wad to anchor the root wad in place.
Each trench will be backfiiled with the material that was stockpiled from the
excavation process. If additional earthfill is needed, the material shall be obtained
from the designated on-site borrow area. Backfill material is to contain sufficient
moisture to allow adequate compaction when tamped with the bucket of the '
hydraulic excavator.
GRADING, SEEDING AND PLANTING
After the installation of the revetment, the channel bank will be sloped from the top of
the native material revetment to the top of the bank on a positive slope. All disturbed
areas will be smoothed to provide positive drainage. The areas shall be stabilized
by seeding, transplanting shrubs and planting seedlings in accordance with
Construction Specification - Streamside Seeding.
NRCS-NC Page 2 of 2 11/00
Root Wad System AGJessup
CONSTRUCTION SPECIFICATION
STREAMSIDE SEEDING
The work shall consist of preparing the area, furnishing and placing seed, sprigs, mulch, fertilizer,
inoculate, soil amendments and anchoring mulch in the designated areas as specified; streambanks, access
areas and other areas disturbed by construction activities.
Seedbed Preparation
On sites where equipment can be operated safely the seedbed shall be adequately loosened and smoothed.
Disking or cultipacking or both may be necessary. On sites where equipment cannot operate safely, the
seedbed shall be prepared by hand scarifying to provide a roughened surface so that seed will stay in place.
If seeding is done immediately following construction, seedbed preparation may not be required except on
compacted, polished or freshly cut areas.
Fertilizing
Evenly distribute lime and fertilizer over the area to be seeded. Uniformly mix lime and fertilizer into the
top 3 inches of the soil. Where surface materials are predominately gravel and/or cobble, no incorporation
is required. Apply lime and fertilizer according to soil test results or at the following rates.
Per 1000 sq. $.
Lime
10-10-10 Fertilizer
Seeding
50-100 lbs.
9-12 lbs.
Per Acre
1-2 tons
400-500 lbs.
Temporarv Seeding - Use where needed for erosion and pollution control, when permanent vegetation ,
cannot be established due to planting season and where temporary ground cover is needed to allow native
or woody vegetation to become established.
Fall, Winter. Spring Seeding Per 1000 N. ft. Per Acre
Oats 21bs. 3 bu.
Rye 31bs. 2-3 bu.
Summer Seeding
Sudangrass l lb. 35-45 lbs.
Browntop Millet I lb. 30-401bs.
Permanent Seeding - Use in combination with woody plantings on the upslope side of the riparian planting.
Spring planting time is ideal for native perennial warm season grasses. These grasses should be used when
enhancing wildlife habitat is a goal of the riparian planting. Spring planted seed should be treated with a
cold wet chill process to maximize germination. Fall plantings should be planted with a lightly sowed cool
season annual to hold the soil and the wet chill process is not required. Fertilizer may be omitted when
establishing native grasses.
Fall, Spring Seeding
Tall Fescue
-Native warm season grasses-
Big, Little or Broomsedge Bluestein
Eastern Gamma Grass or Switchgrass
Per 1000 N. fl, Per Acre
1 lb. 501bs.
.2 lbs. PLS (pure live seed) 5 lbs. PLS
%2 lb. PLS 101bs. PLS
NRCS-NC
Streamside Seeding
Page 1 of 2 1/99
JREverhart
Mulching
Mulching should be performed within 48 hours of seeding. Grain straw mulch should be applied on seeded
areas at a rate of 3 bales per 1000 square feet or 1.5 tons per acre. Apply mulch uniformly. Anchor mulch
with .a mulch crimper, asphalt tackifier or appropriate mulch netting.
NRCS-NC Page 2 of 2 1/99
Streamside Seeding JREverhart
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