20020099 Ver 1_COMPLETE FILE_20020118

MEMORANDUM
TO: John Dorney
Non-Discharge Branch
Regional Contact: Steve Mitchell
WO Supervisor: KPn,S.chuster
Date:
SUBJECT: WETLAND STAFF REPORT AND RECOMMENDATIONS
Facility Name Tarboro High School County Edgecombe
Project Number 02 0099 County2
Recvd From APP Region Raleigh
Received Date 1/18/02 Recvd By Region
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 Q Y O N ?- 28-81 Fc NSW 30,303. F I-
Mitigation Wetland
MitigationType Type 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? 0Y 0 N
Is Mitigation required? 0 Y 0 N Recommendation: 0 Issue 0 Issue/fond 0 Deny
Provided by Region: Latitude (ddmmss) Longitude (ddmmss)
Comments:
Wrona PCN used. :,. '_f i e - ul,,, U _S-F 6-e c g vl? ql-
cc: Regional Office
Central Office Page Number 1
Triage Check List
COPY
Date: vZ - "
To: R Steve Mitchell Project Name
?FRO entte DWO Project Number d? ?a
?WaRO Deborah Sawyer County-? V",opGdf'? -
?WiRO Joanne Steenhuis
?WSRO Jennifer Frye
"JARO Mike Parker
?MRO Pete Colwell
From: Telephone [phone]
The file attached is beina forwarded to you for your evaluation. Please call if you need
assistance. j? e e
PStream length impacted
? Stream determination G J f? .
? Wetland determination and -distance to blue-line surface waters on USGW topo maps S -
? Minimizationlavoidance issues
? Buffer Rules (Neuse, Tar-Pa-milco, Catawba, Randleman)
? Pond fill
? Mitigation Ratios - y
? Ditching
? Are the stream and or wetland m gati9n sites available and viable?
? Check drawings for accuracy
n Is the aDDlication consistent with pre-apprication meetings?
s:
Uniteditates Department, of Agriculture USDA
0 n ? C ? Natural Resources
I v R Conservation Service
III Jackson Street P.O. Box 8 Yadkii
January 7, 2002
N.C. Division of Water Quality
ATTN: John Dorney
4401 Reedy Creek Road
Raleigh, NC 27607
Dear Mr. Domey:

Three copies of the Tarboro High Scho,, as required
by the N.C. General 401 Water Quality Certification a with NP #27. This site is in the
Tar-Pamlico River Basin. In addition, I have inclu three co ies of the Pre-Construction
Notification Application that was submitted to the ores of Engineers for Nationwide
Permit #27. The NRCS Emergency Watershed Protection (EWP) program is providing the
funding and technical support to the Edgecombe County Schools for this project.
The project reach is an unnamed tributary to Hendricks Creek at Tarboro High School,
Tarboro, North Carolina. The stream reach was damaged during Hurricane Floyd. This
stream is deeply incised and is classified as Rosgen G5c and G6c stream types with a short
section of an incised E6. This stream is in a very unstable condition with an active headcut
moving upstream through-ftle ach. The proposed work will convert the stream from types
G5c and G6c to ty s B5c and B6c. ` osgen types B5c and B6c are stable stream forms. The
short section of E6 will e . The proposed work will convert the dimensions of the
channel by increasing the entrenchment ratio, creating a bankfull channel, and a bankfull
bench. Rock cross vanes and other in-stream structures will be installed to help dissipate
energy in the streambed and reduce the stress in the near bank region of the stream. Rooted
seedlings will be planted on the channel side slopes. All disturbed areas including the
adjacent top of bank will be stabilized with woody vegetation and grass. The purpose of this
work is to stabilize the damaged reach of stream and allow the channel to be self-maintaining
once the stream is converted and riparian vegetation is established.
Please contact me at [phone] Ext. 5, A. B. Whitley or Joy Sherrod at [phone] if
you hamany questions about this submittal.
ela G. es E.
4An
Civil Engineer "
'>? 18
cc: Dave Coker, Director of Maintenance, Edgecombe Schools
A. B. Whitley, NRCS .
Joy P. Sherrod, NRCS
Michael E. Sugg, NRCS
Donald R. Griffin, NRCS
tss
D\(V
, , 614m

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DEM ID: CORPS ACTION ID:
NATIONWIDE PERMIT REQUESTED (PROVIDE NATIONWIDE PERMIT #): 2 7
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 SHEET). SEVEN (7) COPIES SHOULD BE
SENT TO THE N.C. DIVISION OF ENVIRONMENTAL MANAGEMENT (SEE AGENCY ADDRESSES SHEET).
PLEASE PRINT. //??
1. OWNERS NAME: -1 AR BoRO 141 rjH SCNoOL EOC?. ECOMSE CO. SC HooLS
2. MAILING ADDRESS: 412, PEARL S-r
SUBDIVISION NAME: NIA
CITY: Tf,rztr?c> c:> STATE: NC ZIP CODE: 'L788G
PROJECT LOCATION ADDRESS, INCLUDING SUBDIVISION NAME (IF DIFFERENT FROM
MAILING ADDRESS ABOVE) : 1.4 0o HoW a gM AVEr,UE
TARBORO NC
3. TELEPHONE NUMBER (HOME) : NIA (WORK) : ZS2-G-+1 -2000
4. IF APPLICABLE: AGENT'S NAME OR RESPONSIBLE CORPORATE OFFICIAL,
ADDRESS, PHONE NUMBER: _David L. Cashwell,Public Works Director
500 Main Street, P O Box 220, Tarboro NC 27886-0220 [phone]
5. LOCATION OF WORK (PROVIDE A MAP, PREFERABLY A COPY OF USGS TOPOGRAPHIC MAP OR
AERIAL PHOTOGRAPHY WITH SCALE):
COUNTY: E'L7rsecommE NEAREST TOWN OR CITY: THR F30R O
SPECIFIC LOCATION (INCLUDE ROAD NUMBERS, LANDMARKS, ETC.)
1)T+0 HENDRICKS REEK AT TARSORO H 16H JCHooL_
1400 4OWORD ?V? I??6OR0 STREAM IS LOCATED
ON SOUT(-I SIDE Q57 P fCC. H SCHOOL- P20PER-rY
6. IMPACTED OR NEAREST STREAM/RIVER: NENDRICKS aEE K
RIVER BASIN: AR RIVER - TAR - 1 AAALI CO SAS I r.I
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 [ ] NO [X1 IF YES, EXPLAIN:
7b. IF THE PROJECT IS LOCATED WITHIN A NORTH CAROLINA DIVISION OF COASTAL MANAGEMENT
ARE OF ENVIRONMENTAL CONCERN (AEC)? YES [ ] NO [?(]
7c. IF THE PROJECT IS LOCATED WITHIN A COASTAL COUNTY (SEE PAGE 7 FOR LIST OF COASTAL
COUNTIES), WHAT IS THE LAND USE PLAN (LUP) DESIGNATION: NIA
8a. HAVE ANY SECTION 404 PERMITS BEEN PREVIOUSLY REQUESTED FOR USE ON THIS PROPERTY?
YES [ ] NO [ ] 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 [ X] NO [ ] IF YES, DESCRIBE ANTICIPATED WORK:
NCDENR DWQ 401 GENER?L l_ERTr FICAMQIII No. 32,5G or- 3257-
9A. ESTIMATED TOTAL NUMBER OF ACRES IN TRACT OF LAND: 4 O
9B. ESTIMATED TOTAL NUMBER OF ACRES OF WETLANDS LOCATED ON PROJECT SITE: -Now E
10A. NUMBER OF ACRES OF WETLANDS IMPACTED BY THE PROPOSED PROJECT BY:
FILLING: EXCAVATION:
FLOODING: OTHER:
10B.
(IF RELOCATED, PROVIDE
WIDTH BEFORE (based on normal high water contours): 9. 9 FT
WIDTH AFTER: 1 S • 2, FT
DRAINAGE: TOTAL ACRES TO BE IMPACTED: _
(1) STREAM CHANNEL TO BE IMPACTED BY THE PROPOSED PROJECT
DISTANCE BOTH BEFORE AND AFTER RELOCATION):
LENGTH BEFORE: Co-7.5 FT AFTER: 2 3
AVERAGE DEPTH BEFORE: 1•5 FT AFTER: t•Z FT
(2) STREAM CHANNEL IMPACTS WILL RESULT. FROM: (CHECK ALL THAT APPLY)
OPEN CHANNEL RELOCATION: PLACEMENT OF PIPE IN CHANNEL:
EXCAVA-n o N
CHANNEL-91a sSr° ;;;JQN+' ? CONSTRUCTION OF A DAM/FLOODING:
OTHER:
11. IF CONSTRUCTION OF A POND IS PROPOSED, WHAT IS THE SIZE OF THE WATERSHED DRAINING
TO THE POND? -w IA
WHAT IS THE EXPECTED POND SURFACE AREA?
12. DESCRIPTION OF PROPOSED WORK INCLUDING DISCUSSION OF TYPE OF MECHANICAL EQUIPMENT
TO BE USED (ATTACH PLANS: 8'f x 11" DRAWINGS ONLY) : she inwosecl work Wi I i convert
fh'e egstinQ tinsfable sFream -}yt? (Rosgevi Tope (j5c and GCo) ko a sable
6+eam4(Rosgen 55c and skor-b ?-eacko+ incisad EGWI11
be converted 4o a s4-a61e EG The climevisions and py-olE le of+he channel W;II
be al+ered by crea-tin9 a bank-Full channel and cors+vc+in9 a bankfull 6v,ch•
The Chan es .n n icn wI l increase +he wid+h nd 4he evrlmnc me.
ratio. echanivaI -ectVipry-ven+= h ydraulic excava+or? fron+-end (oader,clump +rvcks
13. PURPOSE OF PROPOSED WVORK: Rock cross vanes 'and o+her in-s+rearn sbolr+ures wi l l
be i,l*b I le -lo sfo +h.e !i dcur+ is ro ress In up4lva han rye l +o
reduce 5+ress 1n 4he near bank re jon, an d?ss? aFe en-erg%1 in 4ke
ba+on-r OF 4-ke c1' annel The primarV 12 noose o-E -I tie work i 5 In restore
44-e s4rearn to a s+@ble s+r2am 4- pe. +l?a+ wi lI 6 Sel-F-mair> Ialn'in.3 over4irn,e.
14. STATE REASONS WHY IT IS BELIEVED THAT THIS ACTIVITY MUST BE CARRIED OUT IN
WETLANDS. (INCLUDE ANY MEASURES TAKEN TO MINIMIZE WETLAND IMPACTS):
IN ITS CuRRE.tjr CoNO1-nC>p 1 TWE STREAM t3,oNK5 AN1:> BLS NAVE
ERODLD c/_a'tsslN!g EXCESS SEQIMEtJT TO EsE CIRE:C-D-`c
DEPpSIT?D 1 N THE S-TREArYI t?E?TOR?? ot?l ?F A STAF3l E C14,z WILL ELIMINATE THE EXCESS ERosi ob i SFpIMEtST-ATl 0I J.
15. YOU ARE REQUIRED TO CONTACT THE STATE HISTORIC PRESERVATION OFFICER (SHPO) (SEE
AGENCY ADDRESSES SHEET) REGARDING THE PRESENCE OF HISTORIC-PROPERTIES IN THE
PERMIT AREA WHICH MAY BE AFFECTED BY THE PROPOSED PROJECT.
DATE CONTACTED : R6FF : N R C 1-3 ACT RE-Em ewr VV/ SN'Po
16. DOES THE PROJECT INVOLVE AN EXPENDITURE OF PUBLIC FUNDS OR THE USE OF PUBLIC
(STATE) LAND? YES [X I NO [ I (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 ENVIRONMENTAL POLICY ACT?
YES [ I NO [x I
b. IF YES, HAS THE DOCUMENT BEEN REVIEWED THROUGH THE NORTH CAROLINA DEPARTMENT
OF ADMINISTRATION STATE CLEARINGHOUSE? YES [ I NO [ I NIA
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, 1302 Marl Service Center, RALEIGH, NORTH CAROLINA 27699-1302,
TELEPHONE [phone].
17. THE FOLLOWING ITEMS SHOULD BE INCLUDED WITH THIS APPLICATION IF PROPOSED ACTIVITY
INVOLVES THE DISCHARGE OF EXCAVATED OR FILL MATERIAL INTO WETLANDS:
a. WETLAND DELINEATION MAP SHOWING ALL WETLANDS, STREAMS, LAKES AND PONDS ON THE
PROPERTY (FOR NATIONWIDE PERMIT NUMBERS. 14, 18, 21, 26, 29, AND 38). ALL
STREAMS (INTERMITTENT AND PERMANENT) ON THE PROPERTY MUST BE SHOWN ON THE MAP.
MAP SCALES SHOULD BE 1 INCH EQUALS 50 FEET OR 1 INCH EQUALS 100 FEET OR THEIR
EQUIVALENT.
b. IF AVAILABLE, REPRESENTATIVE PHOTOGRAPH OF WETLANDS TO BE IMPACTED BY PROJECT.
c. IF DELINEATION WAS PERFORMED BY A CONSULTANT, INCLUDE ALL DATA SHEETS RELEVANT
TO THE PLACEMENT OF THE DELINEATION LINE.
d. ATTACH A COPY OF THE STORMWATER MANAGEMENT PLAN IF REQUIRED.
e. WHAT IS LAND USE OF SURROUNDING PROPERTY? PUBLIC SCHOO L_ SFn, LL FIELD55
PAIR K I NG LOTS RESIDE MITI A L LOTS
f. IF APPLICABLE, WHAT IS PROPOSED METHOD OF SEWAGE DISPOSAL? N1A
g. SIGNED AND DATED BY AGENT AUTHORIZATION LETTER, IF APPLICABLE.
NOTE: WETLANDS OR WATERS OF THE U.S. MAY NOT BE IMPACTED PRIOR TO:
1) ISSUANCE OF A SECTION 404 CORPS OF ENGINEERS PERMIT, AND
2) EITHER THE ISSUANCE OR WAIVER OF A 401 DIVISION OF ENVIRONMENTAL MANAGEMENT
(WATER QUALITY) CERTIFICATION.
94'S/AGENT'S SIGNATURE
(AGENT'S SIGNATURE VALID ONLY
IF AUTHORIZATION LETTER FROM
THE OWNER IS PROVIDED (18G.),)
1-17-02-
DATE
AGENCY ADDRESSES
ENDANGERED SPECIES:
D.S. FISH AND WILDLIFE SERVICE NATIONAL MARINE FISHERIES SERVICE D.S. FISH AND WILDLIFESERVICE
RALEIGH FIELD OFFICE HABITAT CONSERVATION DIVISION ASHEVILLE FIELD OFFICE
P.O. BOX 33726 PIVERS ISLAND 160 ZILLICOA STREET
RALEIGH, NC 27636-3726 BEAUFORT, NC 28516 ASHEVILLE, NC 28801
TELEPHONE [phone] TELEPHONE [phone] TELEPHONE [phone]
HISTORIC RESOURCES:
STATE HISTORIC PRESERVATION OFFICE
N.C. DIVISION OF ARCHIVES AND HISTORY
109 EAST JONES STREET
RALEIGH, NC 27601
TELEPHONE [phone]
STATE REGULATORY AGENCIES:
MR. JOHN DORNEY
DIVISION OF ENVIRONMENTAL MANAGEMENT
NORTH CAROLINA DEPARTMENT OF
ENVIRONMENT AND NATURAL RESOURCES
1621 MAIL SERVICE CENTER
RALEIGH, NORTH CAROLINA 27699-1621
TELEPHONE [phone]
CORPS OF ENGINEERS FIELD OFFICES:
RALEIGH REGULATORY FIELD OFFICE
US ARMY CORPS OF ENGINEERS
6508 FALLS OF THE NEUSE ROAD, SUITE 120
RALEIGH, NC 27615
TELEPHONE [phone]
WASHINGTON REGULATORY FIELD OFFICE
US ARMY CORPS OF ENGINEERS
POST OFFICE BOX 1000
WASHINGTON, NC 27889-1000
TELEPHONE [phone]
MR. STEVE BENTON
DIVISION OF COASTAL MANAGEMENT
NORTH CAROLINA DEPARTMENT OF
ENVIRONMENT AND NATURAL RESOURCES
1638 MAIL SERVICE CENTER
RALEIGH, NORTH CAROLINA 27699-1621
TELEPHONE [phone]
FAX [phone]
ASHEVILLE REGULATORY FIELD OFFICE
US ARMY CORPS OF ENGINEERS
151 PATTON AVENUE, ROOM 143
ASHEVILLE, NC 28801-5006
TELEPHONE [phone]
WILMINGTON REGULATORY FIELD OFFICE
US ARMY CORPS OF ENGINEERS
POST OFFICE BOX 1890
WILMINGTON, NC 28402-1890
TELEPHONE [phone]
COASTAL COUNTIES IN NORTH CAROLINA:
BEAUFORT BERTIE BRUNSWICK
CHOWAN CRAVEN CURRITUCK
HERTFORD HYDE NEW HANOVER
PASQUOTANK PENDER PERQUIMANS
CAMDEN CARTERET
DARE GATES
ONSLOW PAMLICO
TYRRELL WASHINGTON
TROUT COUNTIES IN NORTH CAROLINA:
ALLEGHANY ASHE AVERY
BURKE CALDWELL CHEROKEE
GRAHAM HAYWOOD HENDERSON
MACON MADISON McDOWELL
POLK RUTHERFORD STOKES
SWAIN TRANSYLVANIA WATAUGA WILKES
YANCEY
BUNCOMBE
CLAY
JACKSON
MITCHELL
SURRY
NORTH.CAROLINA COUNTIES LISTED BY APPROPRIATE U.S. ARMY CORPS OF ENGINEERS FIELD OFFICES:
RALEIGH REGULATORY FIELD OFFICE ASHEVILLE REGULATORY FIELD OFFICE
ALAMANCE LEE ALEXANDER LINCOLN
ALLEGHANY NASH AVERY MACON
ASHE NORTHAMPTON BUNCOMBE MADISON
CASWELL ORANGE BURKE MCDOWELL
CHATHAM PERSON CABARRUS MECKLENBURG
DAVIDSON RANDOLPH CALDWELL MITCHELL
DAVIE ROCKINGHAM CATAWBA POLK
DURHAM STOKES CHEROKEE ROWAN
EDGECOMBE SURRY CLAY RUTHERFORD
FRANKLIN VANCE CLEVELAND STANLEY
FORSYTH WAKE GASTON SWAIN
GRANVILLE WARREN GRAHAM TRANSYLVANIA
GUILFORD WILKES HAYWOOD UNION
HALIFAX WILSON HENDERSON WATAUGA
JOHNSTON YADKIN IREDELL YANCEY
JACKSON
WASHINGTON REGULATORY FIELD OFFICE WILMINGTON REGULATORY FIELD OFFICE
BEAUFORT PAMLICO ANSON ROBESON
BERTIE PASQUOTANK BLADEN SAMPSON
CAMDEN PERQUIMANS BRUNSWICK SCOTLAND
CARTERET* PITT CARTERET
CHOWAN TYRRELL COLUMBUS
CRAVEN WASHINGTON CUMBERLAND
CURRITUCK WAYNE DUPLIN
DARE HARNETT
GATES HOKE
GREEN * (CROATAN MONTGOMERY
HERTFORD NATIONAL FOREST MOORE
HYDE ONLY) NEW HANOVER
JONES ONSLOW
LENOIR PENDER
MARTIN RICHMOND
MORPHOLOGICAL CHARACTERISTICS OF THE EXISTING AND PROPOSED
CHANNEL WITH GAGE STATION AND REFERENCE REACH DATA
(After Rosgen, 1996)
Restoration Site (Name of stream & location): UT to Hendricks Creek,
Tarboro High School, Tarboro, NC
Reference Reach (Name of stream & location): Silas Creek, Winston-Salem, NC
VARIABLES EXISTING PROPOSED REFERENCE
CHANNEL REACH REACH
(Silas Creek)
1. Stream type G5c and G6 B5c and B6c B4c/1
2. Drainage area 0.30 w -0.30 3.30
(sq. mi.)
3. Bankfull width Mean: 9.9 Mean: 18.2 Mean: 25.6
(wbkr) - ft.
Range: 9.3-10.7 Range: 16.6-19.9 Range: 23.1-28.0
4. Bankfull mean Mean: 1.9 Mean: 1.2 Mean: 1.7
depth (dbkf) - ft.
Range: 1.6-2.0 Range: 1.1-1.3 Range: 1.5-1.9
5. Width/depth Mean: 5.4 Mean: 15.2 Mean: 15.2
ratio (wbkf/dbkf)
Range: 4.8-6.7 Range: 12.4-18 Range: 12.4-17.2
6. Bankfull cross- Mean: 18.1 Mean: 43.5
sectional area 22.1
Abkf - S q- ft. Range: 16.8-19.5 {18.3-25.9} Range: 38.5-48.9
7. Bankfull mean Mean: 5.1 Mean: 4.4
velocity (vb,f) - f/s 4.2
Range: 4.7-5.5 Ran e: 3.6-4.9
8. Bankfull discharge,
cfs (Qbkf) 92 92 199
9. Bankfull' Mean: 2.6, Mean: 1.9 Mean: 2.7
Maximum depth
dmax - ft Range: 2.0-2.8 Range: 1.7-2.1 Range: 2.4-2.9
10. dm,,/dbkf ratio Mean: 1.4 Mean: 1.6 Mean: 1.6
Range: 1.1-1.5 Range: 1.5-1.6 Range: 1.5-1.6
11. Riffle length (Lff) Mean: Mean: 12.7 Mean: 18.4
- ft. Range: Range: 6.6-19.9 Range: 9.5-29.0
12. Ratio of riffle Mean: Mean: 0.7 Mean: 0.7
length to bkf Range: Range: 0.4-1.0 Range: 0.4-1.0
Width (Lrifr/wbk)
13. Low bank height Mean: Mean: 1.0 Mean: 1.0
to max. db,f ratio Range: Range: Range: 1.0-1.0
14. Width of Mean: 13.35 Mean: 23.7 Mean: 33.7
flood prone area
o
;
wf a - Range: 10.7-14.9 nge: 19.9-30
Ra Range: 33.0-35.0
13. Entrenchment Mean: 1.4 Mean: 1.4 Mean: 1.3
ratio (wfp/wbkf) Range: 1.2-1.5 Range: 1.2-1.8 Range: 1.2-1.4
Page 1 of 7 01/07/02
VARIABLES EXISTING PROPOSED REFERENCE
CHANNEL REACH REACH
14. Meander length Mean: 56.5 Mean: 120.1 Mean: 168
(Lm) - ft. Range: 35.8-63.4 Range: 85.7-191 Range: 130-245
15. Ratio of . Mean: 5.7 Mean: 6.6 Mean: 6.6
meander length
to bankfull Range: 3.6-6.4 Range: 5.1-9.6 Range: 5.1-9.6
width Lm/wbkf
16. Radius of Mean: 19.4 Mean: 29.1 Mean: 41.25
curvature (Ro) -
ft. outside bank Range: 11.1-36.4 Range: 13.3-41.8 Range: 19.5-54.0
17. Ratio of radius Mean: 2.0 Mean: 1.6 Mean: 1.6
of curvature to
bankfull width Range: 1.1-3.7 Range: 0.8-2.1 Range: 0.8-2.1
R./wbkf
18. Belt width (wbl) Mean: 41.5 Mean: 30.9 Mean: 43.7
- ft.
Range: 29.9-59.2 Range: 25.6-39.8 Range: 40-51
19. Meander width Mean: 4.2 Mean: 1.7 Mean: 1.7
ratio (wblt/wbkf)
Range: 3.0-6.0 Range: 1.6-2.0 Range: 1.6-2.0
20. Sinuosity = k 549.4 = 1.2 348 = 1.07
(Stream Lengthth,111d 453.4 1.09 325
valley distance
21. Valley slope 0.0176 0.0176 Not measured
(ft/ft)
22. Average water Mean: 0.0128
surface slope-ft/ft Range: 0.0081- 0.016 0.00819
Sav - s.11. /k 0.0237
23. Pool slope Mean: 0.00395 Mean: 0.00006 Mean: 0.0000376
(spool) - ft/ft Range: -0.004136 to Range:-0.0021 to Range: -0.001316
0.01182 0.002 to 0.00122
24. Ratio of pool Mean: 0.31 Mean: 0.00375 Mean: 0.00459
slope to
average slope Range: -0.32 to 0.92 Range: -0.13 to Range: -0.1607
s oal/Sbkf 0.125 to 0.149
25. Maximum Mean: Mean: 3.1 Mean: 4.5
pool depth
d max pool) - ft. Range: Range: 2.5-3.8 Range: 4.0-5.0
26. Ratio of max Mean: Mean: 2.6 Mean: 2.6
pool depth to
average Range: Range: 2.3-2.9 Range: 2.3-2.9
bankfull depth
dmax ool/dbkf
27. Pool width Mean: Mean: 18.2 Mean: 26.0
w ool _ ft. Range: Range: 15.0-21.9 Range: 22.6-28.0
28. Ratio of pool Mean: Mean: 1.0 Mean: 1.0
width to
bankfull width Range: Range: 0.9-1.1 Range: 0.9-1.1
(wpool/wbkf)
Page 2 of 7 01/07/02
VARIABLES EXISTING PROPOSED REFERENCE
CHANNEL REACH REACH
29. Pool Area - sq ft Mean: Mean: 35.4 Mean: 70.3
A aoi Range: Range: 31-40 Range: 59.9-79.8
30. Ratio of Pool Mean: Mean: 1.6 Mean: 1.6
Area to Bankfull
Area A aoi/Abkf Range: Range: 1.4-1.8 Range: 1.4-1.8
31. Pool to pool Mean: Mean:43.7 Mean: 62.4
spacing (p-p) -
ft. Range: Range: 18.3-97.5 Range: 27.2-126.0
32. Ratio of p-p Mean: Mean: 2.4 Mean: 2.4
spacing to
bankfull width Range: Range: 1.1-4.9 Range: 1.1-4.9
- /Wbkt
33. Pool length Mean: Mean: 21.8 Mean: 31.2
ft
L Range: Range: 8.3-53.7 Range: 8.2 - 68.0
.
o, -
34. Ratio of Pool Mean: Mean: 1.2 Mean: 1.2
length to
ull width
bankf Range: Range: 0.5-2.7 Range: 0.3-2.7
/
.. Wbkf
35. Avg. riffle slope Mean: Mean: 0.0312 Mean: 0.01942
Niff) - ft/ft
Range: Range: 0.0013 to Range: 0.000581 to
0.1118 0.0705
36. Ratio of riffle Mean: Mean: 2.0 Mean: 2.4
slope to avg.
sloe Siff/s" Range: Range: 0.1-7.0 Range: 0.07-8.6
37. Avg. run slope Mean: Mean: 0.017 Mean: 0.0048
ft./ft. Range: Range: 0.013 to Range: -0.0025 to
0.0208 0.01324
38. Ratio of run Mean: Mean: 1.1 Mean: 0.6
slope to avg.
slope s,dsa„ Range: Range: 0.8 to 1.3 Range: -0.3 to 1.6
39. Avg. step slope Mean: Mean: 0.13 Mean: 0.0817
ft/ft Range: Range:0.01 to 0.276 Range: 0.00667
to 0.1733
40. Ratio of step Mean: Mean: 8.1 Mean: 10.0
slope to avg
slope sste sav Range: Range: 0.6-17.3 Range: 0.8-21.2
41. Avg. glide slope Mean: Mean: 0.0078 Mean: 0.004948
ft/ft Range: Range:0.0 to 0.022 Range: 0.00-0.014
42. Ratio of glide Mean: Mean: 0.5 Mean: 0.6
slope to avg
sloes „d,1S,, Range: Range: 0.0 to 1.4 Range: 0.0-1.7
43. Max run depth Mean: Mean: 0.025 Mean: 3.3
dmax ?„? - ft. Range: Range: Range: 3.3-3.3
44. Ratio of max. Mean: Mean: 1.9 Mean: 1.9
run depth to
mean bkf depth Range: Range: Range:
(dmax run/dbkf
45. Run width (W un) Mean: Mean: 18.2 Mean: 26.5
-ft. Range: Range: 14.9-21.9 Range: 24.0-29.0
Page 3 of 7 01/07/02
VARIABLES EXISTING PROPOSED REFERENCE
CHANNEL REACH REACH
46. Run width to Mean: Mean: 1.0 Mean: 1.0
to bankfull width
ratio Wrun/Wbkf Range: Range: 0.9-1.1 Range: 0.9-1.1
47. Mean run depth Mean: Mean: 1.7 Mean: 2.4
drun - ft. Range: Range: 1.5-2.0 Range: 2.2-2.6
48. Ratio mean run Mean: Mean: 1.4 Mean: 1.4
depth to mean
bkf depth Range: Range: 1.4-1.5 Range: 1.4-1.5
drun/dbkf
49. Run w/d ratio Mean: Mean: 11.4 Mean: 11.4
wrun/drun Range: Range: 7.4-16.2 Range: 9.4-13.4
50. Ratio of run w/d Mean: Mean: 0.75 Mean: 0.75
to bkf w/d Range: Range: 0.6-0.9 Range: 0.6-0.9
51. Run length (Lrun) Mean: Mean: 6.2 Mean:, 8.8
- ft. Range: Range: 1.7-11.9 Range: 3.2-16.0
52. Ratio run length Mean: Mean: 0.34 Mean: 0.34
to bkf width
-run/Wbkf Range: Range: 0.1-0.6 Range: 0.1-0.6
53. Max step depth Mean: Mean: 2.0 Mean: 2.95
dmaxste - ft. Range: Range: 1.9-2.3 Range: 2.9-3.0
54. Ratio of max. Mean: Mean: 1.7 Mean: 1.7
step depth to
mean bkf depth Range: Range: 1.7-1.8 Range: 1.7-1.8
dmax ste dbkf
55. Step width (wstep) Mean: Mean: 18.2 Mean: 25.65
- ft. Range: Range: 14.9-21.9 Range: 23.0-28.3
56. Step width to Mean: Mean: 1.0 Mean: 1.0
bankfull width Range: Range: 0.9-1.1 Range: 0.9-1.1
ratio Wste Wbkf
57. Step area (Astep) Mean: Mean: 22.1 Mean: 44.1
- s q. ft. Range: Range: 19.9-24.3 Range: 42.6-45.6
58. Ratio step area Mean: Mean: 1.0 Mean: 1.0
to bkf area Range:
(Aste Abkf) Range: 0.9-1.1 Range: 0.9-1.1
59. Mean step depth Mean: Mean: 1.2 Mean: 1.75
dste ft. Range: Range: 1.1-1.4 Range: 1.6-1.9
60. Ratio of mean Mean: Mean: 1.0 Mean: 1.0
step depth to
mean bkf depth Range: Range: 1.0-1.1 Range: 1.0-1.1
dste dbkf
61. Step w/d ratio Mean: Mean: 14.7 Mean: 14.7
wste dste Range: Range: 11.2-19.8 Ranger 13.1-16.2
62. Ratio of step w/d Mean: Mean: 0.97 Mean: 0.97
to bkf w/d Range: Range: 0.9-1.1 Range: 0.9-1.1
63. Step length Mean: Mean: 2.3 Mean: 12
Lste - ft. Range: Range: 1.1-4.2 Range: 1.5-5.8
64. Ratio of step Mean: Mean: 0.125 Mean: 0.125
length to bankfull Range:
width (Lstep/Wbkf) Range: 0.065-0.21 Range: 0.065-0.21
Page 4 of 7 01/07/02
VARIABLES EXISTING PROPOSED REFERENCE
CHANNEL REACH REACH
65. Max. glide depth Mean: Mean: 2.3 Mean: 3.25
dmax aide -ft. Range: Range: 1.9-2.7 Range: 2.9-3.6
66. Ratio of max. Mean: Mean: 1.9 Mean: 1.9
glide depth to
mean bkf depth Range: Range: 1.7-2.1 Range: 1.7-2.1
dmax lid./dbkf
67. Glide width Mean: Mean: 18.2 Mean: 25.5
w lid. Range: Range: 15.8-20.7 Range: 24.3-26.7
68. Ratio of glide Mean: Mean: 1.0 Mean: 1.0
width to bankfull Range: Range: 0.95-1.04 Range: 0.95-1.04
width W lide/wbkf
69. Glide mean Mean: Mean: 1.4 Mean: 1.95
depth d lids - ft. Range: Range: 1.2-1.7 Range: 1.9-2.0
70. Ratio of mean Mean: Mean: 1.15 Mean: 1.15
glide depth to
bkf depth
mean Range: Range: 1.1-1.3 Range: 1.1-1.3
/
d lid./dbkf
71. Glidew/d ratio Mean: Mean: 13.7 Mean: 13.1
(wglid./dglide) Range: Range: 9.9-16.2 Range: 12.5-13.7
72. Ratio of glide Mean: Mean: 0.9 Mean: 0.9
w/d to riffle w/d Range: Range: 0.8-0.9 Range: 0.8-0.9
73. Glide length Mean: Mean: 7.3 Mean: 9.8
lids _ ft. Range: Range: 3.3-15.9 Range: 5.0-22.0
74. Ratio of glide Mean: Mean: 0.4 Mean: 0.4
length to bankfull
width (Lqlid,/Wbkf) Range: Range: 0.2-0.8 Range: 0.2-0.8
75. Riffle thalweg Mean: Mean: 0.0676 Mean: 0.0423
slope (SriffTW) -
ft/ft Range: Range: 0.014-0.2 Range: 0.0093-
0.1263
76. Ratio riffle TW Mean: Mean: 4.2 Mean: 5.2
slope to mean
bkf slope Range: Range: 0.9-12.5 Range: 1.1-15.4
sriff -rW/sbkf- ft/ft
77. Step thalweg Mean: Mean: 0.2269 Mean: 0.1429
slope (steep Tw) - Range: Range: 0.159-0.317 Range: 0.10-0.20
ft/ft
78. Ratio step TW Mean: Mean: 14.2 Mean: 17.45
slope to mean
bkf slope Range: Range: 9.9-19.8 Range: 12.2-24.4
site Tw/sbkf- ft/ft
79. Run thalweg Mean: Mean: 0.195 Mean: 0.1227
slope (snm -rW) - Range: 0.04-
ft/ft [Note: Run reach Range: Range: 0.064-0.446 0.28125
that goes into pool]
80. Ratio run TW Mean: Mean: 12.2 Mean: 14.98
slope to mean
bkf slope Range: Range: 4.0-27.9 Range: 4.88-34.34
Srun Tw/Sbkf- ft/ft
Page 5 of 7 01/07/02
VARIABLES EXISTING PROPOSED REFERENCE
CHANNEL REACH REACH
81. Glide thalweg Mean: Mean: -0.223 Mean: -0.14022
slope (Sglid.TW) - Range:-0.44 to Range: -0.2778
ft/ft Range: -0.079 to -0.05
82. Ratio glide TW Mean: Mean: -13.9 Mean: -17.12
slope to mean
bkf slope Range: Range: -27.5 to -4.9 Range:-33.9 to -6.1
S lid.'fw/Sbkf - ft/ft
83. Pool entrance Mean: Mean: 0.0559 Mean: 0.0356
thalweg slope
(Spool entranoe.rw) - Range: Range: 0.00 to Range: 0.00 to 0.123
ft/ft 0.0016
84. Ratio pool Mean: Mean: 3.5 Mean: 4.3
entrance TW
slope'to mean Range: Range: 0.00 to 0.1 Range: 0.00 to 15.0
bkf slope
(Spool entrance TW/Sbkf)
- ft/ft
85. Pool exit thalweg Mean: Mean: -0.151 Mean: -0.09492
Slope (Spool exit TW)
- ft/ft Range: Range: -0.529 to 0.0 Range: -0.333 to 0.0
86. Ratio pool exit Mean: Mean: -9.4 Mean: -11.6
TW slope to
mean bkf slope Range: Range: -33.1 to 0.0 Range: -40.7 to 0.0
(Spool exit TW/Sbkf - ft/ft
* Data in Item Nos. 66 through 71 are for use witu a UAU system.
Remarks:
Page 6 of 7 01/07/02
VARIABLES EXISTING PROPOSED REFERENCE
CHANNEL REACH REACH
MATERIALS:
1. Particle Size
Distribution of
Channel
Material
D 16 0.29 mm
D35 0.9
D 50 22.6
D84 200
D 95 Bedrock >2048
2. Particle Size
Distribution of
Bar Material
D16 1.8
D35 15.3
D 50 31.9
D 84 96
D95 117
Largest size
particle at the toe
(lower third) of bar 90 mm
SEDIMENT TRANSPORT VALIDATION
(BASED ON BANKFULL SHEAR STRESS)
Existing Condition
Proposed Condition
Bankfull shear stress - Calculated value (lb/ft)
Critical shear stress - Value from Shields Diagram(lb/ )
OR Grain Diameter from Shields Diagram (mm)
Relation adjusted to' include field data
Critical dimensionless shear stress
Minimum mean db,f calculated using critical
dimensionless shear stress equations
Manning's "n"
These values and ratios were calculated and proposed by:
Name: Angela G. Jessup Location: Yadkinville TSO
Title: Civil Engineer Date: November 16, 2001
Revised: November 28, 2001
Checked by: Alan Walker Date: November 29, 2001
Page 7 of 7 01/07/02
MORPHOLOGICAL CHARACTERISTICS OF THE EXISTING AND PROPOSED
CHANNEL WITH REFERENCE REACH DATA
(Rosgen, 1996)
Restoration Site: UT to Hendricks Creek, Tarboro High School Site,
Tarboro, NC-Edgecombe County
Reference Reach: Mill Creek (downstream of Shattalon Dr.), Winston-Salem, NC
VARIABLES EXISTING PROPOSED REFERENCE
CHANNEL REACH REACH
(Mill Creek)
1. Stream type Incised E6 E6 E5
2. Drainage area 0.3 sq.mi. 0.3 sq.mi. 48.8 sq.mi.
(sq. mi.)
3. Bankfull width 9.4 Mean: 10.8 Mean: 43.3
(wbkf) - ft.
Range: 9.8 -12.1 Range: 38.3 - 50.8
4. Bankfull mean 1.7 Mean: 1.7 Mean: 6.8
depth (dbkf) - ft.
Range: 1.6 -1.8 Range: 5.9 - 7.5
5. Width/depth 5.5 Mean: 6.5 Mean: 6.5
ratio (wbkf/dbkf)
Range: 5.4 - 7.5 Range: 5.9 - 7.5
6. Bankfull cross- 16.2 Mean: 18 Mean: 289.8
sectional area
Abkf - S q- ft. Range: 17.1 -19.4 Range: 285.9- 297.5
7. Bankfull mean 5.7 Mean: 5.1 Mean: 7.1
velocity vbkf Range: 4.7 - 5.4 Range: 6.9 - 7.2
8. Bankfull 92 92 2052
discharge, cfs
Qbkf
9. Bankfull 2.7 Mean: 2.2 Mean: 8.8
Maximum depth
dmax - ft. Range: 1.9 - 2.5 Range: 7.7 - 9.6
10. Max drill/dbkf ratio 1.6 Mean: 1.3 Mean: 1.3
Range: 1.2 -1.4 Range: 1.2 -1.4
11. Rifle Length (Ldff) 28.7 Mean: 8.3 Mean: 30.7
ft.
Range: 7.0 - 9.9 Range: 12 - 48
12. Ratio riffle length to 1.44 Mean: 0.77 Mean: 0.71
bkf width
width
Leff Range: 0.71 - 0.82 Range:
13. Low bank height to 1.44 Mean: 1.0 Mean: 1.2
max. dbkf ratio Range: 1.0 -1.2 Range:
14. Width of 28.7 Mean: 23.8 (min)> Mean: 300+
flood prone area Range: 21.6-26.6 (min)
wf a - ft. OR GREATER Range:
15. Entrenchment 3.1 Mean: > 2.2 (min) Mean: 7.0+
ratio (WfPa/wbkf)
Page 1 of 4
VARIABLES EXISTING PROPOSED REFERENCE
CHANNEL REACH REACH
16. Meander length Mean: 46 Mean: 69.1 Mean: 277
(Lm) _ ft Range: 48 -104.1 Range: 250 - 330
Range: 37.0-58.8
17. Ratio of Mean: 4.9 Mean: 6.4 Mean: 6.4
meander length
to bankfull Range: 3.9 - 6.3 Range: 4.9 - 8.6 Range: 4.9 - 8.6
width (Lm/wbkf)
18. Radius of Mean: 40.7 Mean: 34.6 Mean: 138
curvature (R,) -ft.
Range: 36.7 - 44.6 Range: 20.1 - 67.8 Range: 105 - 215
19. Ratio .9f radius' Mean: 4.3 Mean: 3.2 Mean: 3.2
of curvature to
bankfull width Range: 3.9 - 4.7 Range: 2.1 - 5.6 Range: 2.1 - 5.6
Rrfwbkf
20. Belt width (wblt) - ft. Mean: 25.4 Mean: 16.2 Mean: 65
Range: 21.1 - 27.8 Range: 12.7 - 20.6 Range: 49.8 - 86.4
21. Meander width Mean: 2.7 Mean: 1.5 Mean: 1.5
ratio (wb,t/wbkf)
Range: 2.2 - 3.0 Range: 1.3 -1.7 Range: 1.3 -1.7
22. Sinuosity
(stream length/ 1.02 1.1 1.07
valley distance)
k
23. Valley slope Not Measured 0.0176 (calculated) Not Measured
(ft/ft)
24. Average slope 0.025 0.014 0.0019
Sav i Svalle /k
25. Pool slope Mean: 0.0046 Mean: 0.009 Mean: 0.0012
(spool) (ft/ft)
Ran e:0.0013-0.0078 Range:-0.006-0.022 Range:-0.0079-0.0027
26. Ratio of pool Mean: 0.18 Mean: 0.6 Mean: 0.6
slope to
average slope Range: 0.05 - 0.31 Range: -0.4 -1.6 Range: -0.4 -1.4
S ool/Sbkf
27. Maximum Mean: 3.3 Mean: 2.6 Mean: 9.95
pool depth
(d aol) - ft. Range: Range: 2.1 - 3.1 Range: 9.9 -10.0
28. Ratio of pool Mean: 1.9 Mean: 1.5 Mean: 1.5
depth to
average Range Range: 1.3 -1.7 Range: 1.3 -1.7
bankfull depth
(d col/dbkf)
Page 2 of 4 01/07/02
VARIABLES EXISTING PROPOSED REFERENCE
CHANNEL REACH REACH
29. Pool width Mean: 11.35 Mean: 12.3 Mean: 49.5
(Wpool) - ft.
Range: 11.3 -11.4 Range: 9.3 -16.0 Range: 48.5 - 50.5
30. Ratio of pool Mean: 1.2 Mean: 1.14 Mean: 1.14
width to
bankfull width Range: Range: 0.95 -1.32 Range: 0.95 -1.32
(W ool/Wbkf)
31. Pool Area Mean: 21.5 Mean: 18.7 Mean: 301.4
(Apool) - sq. ft.
Range: 20.9 - 22.1 Range: 17.3 - 20.6 Range: 288.8 - 315.4
32. Ratio of Pool mean: 1.32 Mean: 1.04 Mean: 1.04
Area to Bankfull
Area Range: 1.29 -1.36 Range: 1.01 -1.06 Range: 1.01 -1.06
33. Pool to pool Mean: 21.3 Mean: 21.6 Mean: 85.3
spacing (p-p) -ft.
Range: 12.1 - 32 Range: 12.7 - 35.1 Range: 51 - 145
34. Ratio of p-p Mean: 2.3 Mean: 2.0 Mean: 2.0
spacing to
bankfull width Range: 1.3 - 3.4 Range: 1.3 - 2.9 Range: 1.3 - 2.9
- /Wbkf
35. Pool Length Mean: 8.1 Mean: 13 Mean: 53.4
(I-pool) - ft.
Range: 4.5 -10.5 Range: 9.3 -18.2 Range: 36.5 - 75
36. Ratio of Pool Mean: 0.9 Mean: 1.2 Mean: 1.2
Length to Bankfull
Width L aol/Wbkf Range: 0.5 -1.1 Range: 0.95 -1.5 Range: 0.95 -1.5
37. Average Riffle Slope Mean: 0.059 Mean: 0.035 Mean: 0.0042
(sdfne) (ft/ft)
Range: Range: 0.029 - 0.04 Range: 0.0034 - 0.0048
38-. Ratio of Riffle Slope Mean: 2.4- Mean: -2.5 Mean: 2.2
to Average Slope
sm/say Range: Range: 2.1 - 2.9 Range: 1.8 - 2.5
Page 3 of 4 01/07/02
VARIABLES EXISTING PROPOSED REFERENCE
CHANNEL REACH REACH
MATERIALS:
1. Particle Size
Distribution of
Channel Material
mm EXISTING
CHANNEL PROPOSED
REACH REFERENCE
REACH
D16 0.19
D35 0.34
D 50 0.5
D 84 9
D 95 15
2. Particle Size
Distribution of
Bar Material EXISTING
CHANNEL PROPOSED
REACH REFERENCE
REACH
D 16 0.4
D35 0.87
D50 1.6
D84 8.1
D 95 19
Largest size particle at
the toe (lower third) of
bar 25
These values and ratios were calculated and proposed by:
Name: Alan Walker Location: Waynesville AO
Title: Resource Conservationist Date: December 5, 2001
Checked by: An;pl? -Ipc- ip Date: nprpmhar5 2nni
Remarks: Mill Creek reference reach data was collected by Rocky Powell, Clear Creeks
Consulting, Jarrettsville, MD.
Page 4 of 4 01/07/02
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Tarboro High School
Stream Restoration
EWP Project - Tarboro, NC
SPECIFICATIONS
TYPE SPEC.#
CONSTRUCTION 8
401
402
404
405
406
409
421
423
461
470
495
TITLE
Mobilization and Demobilization
Pollution Control
Removal of Water
Erosion Control Blanket
Plant Materials
Seeding, Sprigging and Mulching
Safety Fence/Barrier
Excavation
Earthfill
Rock Structures
Root Wads/Log Sills
Nonwoven Geotextiles
8/10/01
CONSTRUCTION SPECIFICATION
8. MOBILIZATION AND DEMOBILIZATION
1. SCOPE
The work shall consist of the mobilization and demobilization of the
Contractor's forces and equipment necessary for performing the work required
under the contract.
This work shall not include mobilization and demobilization for specific items of
work for which payment is provided elsewhere in the contract.
Mobilization will not be considered as work in fulfilling the contract requirement
for commencement of work.
2. EQUIPMENT AND MATERIALS
Mobilization shall include all activities and costs for transportation of personnel,
equipment, and operating supplies to the site; establishment of offices,
buildings, and other necessary facilities for the Contractor's operations at the
site; premiums paid for performance and payment bonds, including
coinsurance and reinsurance agreements as applicable; and other items
necessary for mobilization of the site.
Demobilization shall include all activities and costs for transportation of
personnel, equipment, and supplies not included in the contract from the site;
including the disassembly, removal and site clean up, of offices, buildings, and
other facilities assembled on the site for this contract.
This work includes mobilization and demobilization required by the contract at
the time of award. If additional mobilization and demobilization activities and
costs are required during the performance of the contract as a result of
changed, deleted, or added items of work for which the Contractor is entitled to
an adjustment in contract price, compensation for such costs will be included in
the price adjustment for the item or items of work changed or added.
3. PAYMENT
Payment for Mobilization will be made at the contract lump sum price. Payment
will be made as the work proceeds, after presentation of invoices by the
Contractor showing specific mobilization and demobilization costs and
evidence of the charges of suppliers, subcontractors, and others. If the total of
such payments is less than the lump sum contract price, the unpaid balance
will be included in the final contract payment. Payment of the lump sum
contract price for mobilization and demobilization will constitute full
compensation for completion of the work.
NRCS-NEH-20 8-1 10/98
Payment will not be made under this item for the purchase costs of materials
having a residual value, the purchase costs of materials to be incorporated in
the project, or the purchase costs of operating supplies.
4. ITEMS OF WORK AND CONSTRUCTION DETAILS
Items of work to be performed in conformance with this specification and the
construction details are:
a. Bid Item 1. Mobilization/Demobilization
(1) This item shall consist of the mobilization and demobilization required
by the Contractor to perform the work under this contract.
NRCS-NEH-20 8-2 10/98
CONSTRUCTION SPECIFICATION
401. POLLUTION CONTROL
1. 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 from construction activities. 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. Pollution control for any disposal area is the
responsibility of the Contractor unless the area is within the work limits of this
project.
2. MATERIALS
Earthfill - The earth materials used in constructing the earthfill portions of the
diversions and/or waterways shall be suitable materials obtained from
required excavations or earth materials obtained from the designated borrow
area. Material for earthfill shall be free from frozen material, brush, roots,
sod, stones over six (6) inches in diameter or other objectionable materials.
Rock used in construction of the sediment basin shall conform to the
requirements of Construction Specification 461 - Rock Structures.
Geotextile used in the foundation of the sediment basin shall meet the
requirements of Construction Specification 495 - Nonwoven Geotextiles.
Temporary Silt Fence - The temporary silt fence shall conform with the
requirements of Type 3, Class B Engineering Fabric as shown in Table 1056-
1 on page 562 of the North Carolina Department of Transportation's
Standard Specifications for Roads and Structures, July 1995 English edition.
3. EROSION AND SEDIMENT CONTROL MEASURES AND WORKS
The measures and works shall include but not be limited to the following as
shown on the drawings or as specified in Section 8 of this specification.
a. Staging of Earthwork Activities The excavation and moving of soil
materials shall be scheduled to minimize the size of areas disturbed and
unprotected from erosion for the shortest reasonable time.
NRCS-NC 401-1 10/98
Rev. 8/01
b. Seeding Seeding to protect disturbed areas shall occur as soon as
reasonably possible following completion of that earthwork activity.
c. Mulching Mulching to provide temporary protection of soil surfaces
from erosion.
d. Diversions Diversions to divert water from work areas and to collect
water from work areas for treatment and safe disposition. These
works are temporary and shall be removed and the area restored to its
near original condition when they are no longer required or when
permanent measures are installed.
e. Stream Crossings Culverts or bridges where equipment must cross
streams. These works are temporary and shall be removed and the
restored to its near original condition when they are no longer required
or when permanent measures are installed.
Sediment Basins and Sediment Traps Sediment basins and sediment
traps are to collect, settle and eliminate sediment from areas that
would be impacted below the construction site or disposal area.
These works are temporary and shall be removed and the area
restored to its original condition when they are no longer required or
when permanent measures are installed.
g. Waterways - Waterways shall be used for the safe disposal of runoff
from fields, diversions and other structures or measures.
h. Temporary Silt Fence A water permeable filter type of fence for the
purpose of removing suspended particles from the water passing
through it.
i. Other Additional protection measures as required by Federal, State,
or Local Government.
4. CHEMICAL POLLUTION
The Contractor shall provide water-tight 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 fluids, grease,
soaps, concrete mixer wash water, asphalt, etc., produced as a by-
product of the construction activities. At the completion of the
construction work, sumps shall be removed and the -area restored to its
original condition. Sump removal shall be conducted without causing
pollution. In lieu of a sump, the Contractor shall provide watertight
containers for disposing of chemical pollutants.
NRCS-NC 401-2 10/98
Rev. 8/01
Sanitary facilities such as chemical toilets, or septic tanks shall not be
located adjacent to live streams, wells, or springs. They shall be located
at a distance sufficient to prevent contamination of any water source. At
the completion of construction activities, facilities shall be disposed of
without causing pollution. Portable toilets shall be provided and used for
the sanitary facilities on site.
5. AIR POLLUTION
The burning of brush and/or slash, and disposal of other materials shall
adhere to state and local regulations.
Fire prevention measures shall be taken to prevent the start or spreading
of wild fires which may result from project activities. Firebreaks or guards
shall be constructed and maintained at locations shown on the drawings.
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 construction operations at
all times. If chemical dust suppressants are applied, 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 (5) working days prior to the first application.
6. MAINTENANCE, REMOVAL. AND RESTORATION
All pollution control measures and temporary works shall be adequately
maintained in a functional condition for the duration of the construction
period. All temporary measures shall be removed and the site restored to
near original condition unless shown otherwise in the drawings.
7. MEASUREMENT AND PAYMENT
Method 1 For items of work for which specific unit prices are established
in the contract each item will be measured to the nearest unit applicable.
Payment for each item will be made at the contract unit price for that item.
Such payment will constitute full compensation for all labor, equipment,
tools, and all other items necessary and incidental to the completion of
the work.
Method 2 For items of work for which specific lump sum prices are
established in the contract, payment for pollution control will be made at
the contract lump sum price. Payment will be made as the work proceeds
and invoices presented by the Contractor that reflect actual costs will
support payment. If the total of all progress payments is less than the
NRCS-NC 401-3 10/98
Rev. 8/01
lump sum contract price for this item, the balance remaining for this item
will be included in the final contract payment. Payment of the lump sum
contract price will constitute full compensation for all labor, equipment,
tools, and all other items necessary and incidental to the completion of
the work.
All Methods Compensation for any item of work described in the contract
but not listed in the bid schedule will be included in the payment for the
item of work to which it is made subsidiary. Payment for all seeding shall
be made under the bid item for Vegetation, seeding, payment for all
mulching shall be made under the bid item for Mulching and payment for
all erosion control blanket shall be made under the bid item for Erosion
Control Blanket. Otherwise, pollution control performed in conjunction
with any item of work is subsidiary to the Pollution Control item of work.
8. ITEMS OF WORK AND CONSTRUCTION DETAILS
Items of work to be performed in conformance with this specification and
the construction details are:
a. Bid Item 2, Pollution Control
(1) This item shall consist of all work necessary to control soil erosion
and minimize the introduction of sediment and other pollutants to
the 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.
(2) Disturbed areas, where active construction is not being performed,
that may contribute to pollution, shall be straw mulched and/or
seeded to temporary or permanent vegetation in a timely manner.
All mulching and seeding shall be performed in accordance with
Construction Specification 406, Seeding, Sprigging and Mulching.
Payment for all seeding shall be made under the bid item for
Vegetation, seeding. Payment for all mulching shall be made
under the bid item for Mulching.
(3) The temporary diversions shall be constructed to the lines and
grades shown on the drawings and/or as staked in the field by the
Inspector. Diversions shall be constructed in concurrence with the
excavation of the sediment basin at the off-site disposal area. The
diversions shall be maintained throughout the construction
operations. The estimated quantity of diversions is 250 linear feet.
(4) The sediment traps shall be constructed, at the outlet end of the
diversions, to the lines and grades shown on the drawings and/or
NRCS-NC 401-4 10/98
Rev. 8/01
as staked in the field by the Inspector. The estimated quantity of
NC DOT #5 washed stone is 1 tons.
(5) The temporary sediment basins shall be constructed to the lines
and grades shown on the drawings and/or as staked in the field by
the Inspector.
There are two (2) temporary sediment basins to be installed at the
project site. The first temporary sediment basin shall be installed
prior to the start of construction in the channel at Station 3+38.
The second temporary sediment basin shall be installed prior to
the start of construction at Station 5+64. The Inspector during
layout may adjust the location of the temporary sediment basins.
The estimated quantity of NC DOT Class B erosion control stone
is 150 tons. The estimated quantity of NC DOT #5 washed stone
is 11 tons. The estimated quantity of nonwoven geotextile is 100
square yards.
(6) In lieu of a sump, the Contractor shall provide watertight
containers for disposing of chemical pollutants.
(7) Portable toilets shall be provided and used for the sanitary
facilities.
(8) Measurement and payment will be by Method 2.
(9) The following items of work are subsidiary to this bid item:
(a) Excavation, pollution control as specified in Construction
Specification 421, Excavation.
(b) Earthfill, pollution control as specified in Construction
Specification 423, Earthfill.
(c) Rock, pollution control as specified in Construction
Specification 461, Rock Structures.
b. Bid Item 3, Pollution, silt fence
(1) This item shall consist of the construction of the silt fence as shown
on the drawings to control soil erosion and minimize the introduction
of sediment to water during construction.
(2) The Inspector will stake the location of each fence.
(3) The silt fence will be installed around the'temporary stockpile area
prior to the start of excavation operations.
NRCS-NC 401-5 10/98
Rev. 8/01
(4) Measurement and payment will be by Method 1.
(5) The following items of work are subsidiary to this bid item:
(a) Excavation, silt fence as specified in Construction Specification
421. Excavation.
(b) Earthfill, silt fence as specified in Construction Specification 423,
Earthfill.
NRCS-NC 401-6 10/98
Rev. 8/01
CONSTRUCTION SPECIFICATION
402. REMOVAL OF WATER
1. SCOPE
The work shall consist of the removal and/or control of surface, ground, and
steam flow waters as necessary to perform the construction required by the
contract in accordance with the specifications. It shall include: (1) constructing,
installing, building, and maintaining all necessary temporary water containment
facilities, channels, and diversions, (2) furnishing, installing, and operating all
necessary pumps, piping, and other facilities and equipment, and (3) removing
all such temporary works and equipment after their intended function is no
longer required.
2. DIVERTING SURFACE WATER
The Contractor shall install, maintain and operate all cofferdams, channels,
flumes, sumps, and all other temporary diversion and protective works needed to
divert stream flow and other surface water through or around the construction
site. Control of surface water shall be continuous during the period that damage
to construction work could occur. Unless otherwise specified and/or approved,
the diversion outlet shall be into the same drainage way that the water would
have reached before being diverted.
The Contractor shall furnish the Contracting Officer, in writing, a proposed plan
for diverting water before beginning any construction activities for which a
diversion is required. Acceptance of this plan, or the waiving of the plan
requirement, will not relieve the Contractor of the responsibilities related to this
activity during the process of. completing the work as specified.
3. DEWATERING THE CONSTRUCTION SITE
Foundations, cutoff trenches, and all other parts of the construction site shall be
dewatered and kept free of standing water and muddy conditions as necessary
for the proper execution of the work. The Contractor shall furnish, install,
operate, and maintain all drains, sumps, pumps, and all other equipment
required to properly dewater the site as specified. Dewatering systems that
cause a loss of soil fines from the foundation areas will not be permitted.
The Contractor shall furnish the Contracting Officer, in writing, a proposed plan
for dewatering before commencing with any construction activity for which
dewatering may be required. Acceptance of this plan, or the waiving of the plan
requirement, will not relieve the Contractor of responsibilities for completing the
specified work.
NRCS-NC 402-1 1/01
Revised 12/01
4. EROSION AND POLLUTION CONTROL
Removal of water from the construction site, including the borrow areas, shall be
accomplished in a manner that erosion and the transporting of sediment and
other pollutants are minimized. Dewatering activities shall be accomplished in a
manner that the water table water quality is not altered. Pollution control
activities shall not conflict with the requirements of Construction Specification
401. Pollution Control.
5. REMOVAL OF TEMPORARY WORKS
When temporary works are no longer needed, the Contractor shall remove and
return the area to a similar condition that existed prior to construction. Areas
where temporary works were located shall be graded for sightly appearance with
no obstruction to natural surface water flows or the proper functioning and
access to the works of improvement installed. The Contractor shall exercise
extreme care during the removal stages to minimize the loss of soil sediments
and debris that was trapped during construction.
6. MEASUREMENT AND PAYMENT
This item shall consist of the removal and/or control of surface, ground, and
stream flow waters as needed to perform the required construction in
accordance with the drawings and specifications. Payment for Removal of
Water will be made at the contract lump sum price. Payment will be made as
the work proceeds and invoices presented by the Contractor that reflect actual
costs will support payment. If the total of all progress payments is less than the
lump sum contract price for this item, the balance remaining for this item will be
included in the final contract payment. Payment will constitute full compensation
for all labor, equipment, tools and all other items necessary and incidental to the
completion of the work.
Compensation for any item of work described in the contract, but not listed in the
bid schedule, will be included in the payment for the contract line item to which it
is made subsidiary. Pollution control performed in conjunction with this item of
work is subsidiary to the Pollution Control item of work.
N RCS-NC 402-2 1/01
Revised 12/01
7. ITEMS OF WORK AND CONSTRUCTION DETAILS
Items of work to be performed in conformance with this specification and the
construction details are:
(a) Bid Item 4. Removal of Water
(1) This item shall consist of the removal and/or control of surface, ground
and stream flow waters as needed to perform the required construction
in accordance with the drawings and specifications. It is anticipated that
the removal of water for this contract will require pumping the stream
flow water around the active construction area in the stream.
(2) The active construction reach to be dewatered shall be 100 linear feet or
less unless the entire project length is dewatered for the entire
construction phase. If the entire project length is dewatered, all
sediment and erosion control measures must be installed in accordance
with the requirements of Construction Specification 401. Pollution
Control prior to the start of construction.
(3) Measurement and payment will be by lump sum as described in Section
6.
NRCS-NC 402-3 1/01
Revised 12/01
CONSTRUCTION SPECIFICATION
404. EROSION CONTROL BLANKET
1. SCOPE
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.
2. MATERIALS
The erosion control blanket/channel lining shall be a machine-produced mat with a
100% coconut fiber matrix.
The blanket shall be of consistent thickness with the coconut fiber evenly distributed
over the entire area of the mat. The blanket shall be covered on the top and bottom
with heavyweight polypropylene netting having ultraviolet additives to delay
breakdown and 3/8" to 5/8" mesh size. The blanket shall be sewn together on 1-1/2
to 2 inch centers with UV stable polypropylene thread.
The erosion control blanket shall be Robexshield RSC-4 Coconut Erosion Control
Blanket, North American Green C125 Long Term Erosion Control Blanket or
equivalent.
3. SUBGRADE 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 406 - Seeding,
Sprigging and Mulching prior to installation of the blanket. The blanket shall not be
placed until the prepared subgrade has been inspected and approved by the
Engineer.
4. PLACEMENT
The top edge of the blanket shall be anchored in a 6-inch deep by 6-inch wide
trench approximately 2 feet back from the top of the slope. The trench shall be
backfilled and compacted after the blanket is fastened in the trench with staples or
biodegradable fasteners (i.e., Eco-Stake, Bio-Stake). The blankets shall be placed
with a minimum 4-inch overlap from one section of blanket to the next section. The
blanket shall be overlapped with the upstream section overlapping the downstream
section. All overlaps shall be secured with staples or stakes spaced 12 inches
apart. 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.
NRCS-NC 404-1 Rev. 12-01
Erosion Control Blanket
The blanket shall be fastened with staples or biodegradable 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. If specified in Section 8,
live stakes may also be used in conjunction with the biodegradable fasteners to
secure the blanket.
The edge of the blanket at or below normal water level shall be anchored in a 6-inch
deep by 6-inch wide trench. The blanket shall be fastened in the trench with staples
or stakes. The anchor trench shall be backfilled with stone or soil and compacted.
5. LIVEYPLANTING THROUGH THE EROSION CONTROL BLANKET
An 'W shall be cut in the blanket using a utility knife or other sharp implement. The
size of the opening should slightly exceed the limits of excavation for the size of the
plant's root ball. If the plant's root ball is less than 3 inches in diameter, a single 6-
inch cut in the blanket will provide enough room to insert the plant.
After placing the plants though the opening in the blanket and replacing and
compacting the soil around the plant, the flaps of the blanket shall be folded back in
place. Staples or stakes shall be installed to secure the blanket back in place. The
staples or stakes shall be placed as close to the stem of the plant as possible
without damaging the plant. Install staples or stakes on a 4-inch spacing around
plant until the cut in the blanket is secured. If soil is left exposed due to mounding
of earthfill around the installed root ball, extra pieces of the erosion control blanket
may be required to cover the area.
6. MAINTENANCE AND RESTORATION
The Contractor shall maintain the areas treated with the erosion control blanket until
all work under the contract has been completed and accepted. Maintenance shall
consist of the repair of areas damaged by water erosion, wind, fire, or other causes.
Such areas shall be repaired to reestablish the intended condition and to the design
lines and grades required by the contract. The areas shall be treated with lime,
fertilizer and seed in accordance with Construction Specification 406 - Seeding,
Sprigging and Mulching prior to the new or re-application of the erosion control
blanket.
7. PAYMENT
For items of work for which specific unit prices are established in the contract, the
quantity of erosion control blanket for each type placed within the specified limits will
be determined to the nearest specified unit by computing the area of the actual roll
size, or partial roll size installed. The computed area will include the amount
required for overlap, seams, and anchorage as specified. Payment for the erosion
NRCS-NC 404-2 Rev. 12-01
Erosion Control Blanket
control blanket and fasteners will be made at the contract unit price for Erosion
Control Blanket. Such payment shall constitute full compensation for all labor,
equipment, materials, tools and other items necessary and incidental to the
completion of the work.
8. ITEMS OF WORK AND CONSTRUCTION DETAILS
Items of work to be performed in conformance with this specification and the
construction details are:
(a) Bid Item No. 13, Erosion Control Blanket
(1) This item of work shall consist of the installation of the erosion control
blanket on the-slopes of the repaired and newly constructed channel reach
and on any other disturbed areas as shown on the plans or staked in the
field. The erosion control blanket shall be installed after the slopes have
been treated in accordance with Construction Specification 406 - Seeding,
Sprigging and Mulching.
(2) The erosion control blanket shall be fastened using 12-inch EcoStakes (or
equivalent) or 8-inch staples made from 11 gauge steel wire.
(3) Measurement and payment shall be as specified in Section 7.
NRCS-NC 404-3 Rev. 12-01
Erosion Control Blanket
CONSTRUCTION SPECIFICATION
405. PLANT MATERIALS
1. GENERAL
The work shall consist of furnishing and installing all herbaceous plantings,
rooted cuttings, rooted seedlings, potted shrubs and trees of the kinds and
sizes specified, at the locations shown on the drawings and as specified.
2. MATERIALS
Prior to bidding, the Contractor shall verify all sources of supply to insure that
the size, 'species, variety and quality of plants specified can be supplied. At
least one week prior to delivery, the Contractor shall notify the Contracting
Officer of the source of the herbaceous plantings, rooted seedlings, potted
shrubs and trees.
All plants shall be packed in a manner to insure adequate protection against
climatic, seasonal or other injuries during transit. Special care shall be taken
for prompt delivery and careful handling during delivery. Each shipment of
plants to the site shall have a delivery ticket indicating source of supply, exact
quantities, sizes and.species delivered. A copy of all delivery tickets shall be
provided to the Inspector.
Each plant type shall be properly identified by name and size on legible
weatherproof labels securely attached to plants or labeled on (or in) the plant
container. All plants shall be nursery grown, unless otherwise specified. All
plants shall have normal, well-developed branches and vigorous root systems.
They shall be sound, healthy, vigorous, free from defects, disfiguring knots,
abrasions of the bark, sun scaled injuries, plant diseases, insect eggs, borers,
and all other forms of infections. Final acceptance of all plant materials shall be
given only after the materials are planted and after all requirements are met.
Unacceptable plant materials shall be immediately removed from the job site at
the contractor's expense.
3. PERMANENT HERBACEOUS PLANTINGS
The permanent herbaceous plantings shall be of the following species:
• Daylily (Hemerocallis fulva)
The herbaceous plantings shall have at least one year of growth. They shall be
planted 1 '/2 feet apart. Rows shall be planted in a staggered pattern on
alternate rows. Adequate backfill shall be placed and hand-compacted around
each planting.
NRCS-NC 405-1 12/01
4. ROOTED SEEDLINGS AND ROOTED CUTTINGS
The rooted seedlings shall be of the following species:
• Summersweet Clethra (Clethra alnifolia)
• Tag Alder (A/nus serrulata)
The rooted cuttings shall be of the following species:
• Virginia Willow (Itea virginica)
• Silky Dogwood (Corpus ammomum)
• Stiff Dogwood (Corpus foemina)
The rooted seedlings and rooted cuttings shall have at least 2 years of growth.
The rooted seedlings and cuttings shall be planted 6 feet apart. The first row of
rooted seedlings shall be planted at least 6 inches above the water line.
The rooted seedlings and rooted cuttings shall be planted in a staggered pattern
in alternate rows. Adequate backfill shall be placed and hand-compacted
around each planted cutting.
5. POTTED TREES OR SHRUBS
Preparation - Circular planting pits that are 1-1/3 times the diameter of the pot
shall be dug with a level bottom to a depth that is 6 inches deeper than the
necessary planting depth. The sides and bottom of the pit shall be well
scarified. Before setting the plants, each pit shall be filled with 6 inches of
backfill material, lightly tamped and watered. The mixture used for backfilling
shall consist of topsoil that may be mixed with peat moss or potting soil. When
the container is removed, the plant shall be placed in the center of the individual
pit. Additional backfill material shall be added in 6-inch layers, lightly tamped,
until the backfill is 3/ complete. When the backfill is g/ complete, the plant pit
shall be filled with water. After the pit has drained, it shall be filled with backfill
material to 1 to 2 inches below average ground.
Riparian Zone - Potted trees/shrubs shall be planted at the top of the
streambank in the riparian zone as shown on the plans. The plant species shall
be as specified below unless otherwise approved by the Contracting Officer's
Representative:
• Sycamore (Platanus occidentalis)
• Green Ash (Fraxinus pennsylvanica)
• River Birch (Betula nigra)
NRCS-NC 405-2 12/01
The potted trees/shrubs shall be approximately 24 inches in height and shall
have at least 2 years growth.. They shall be placed on a 10-foot spacing. The
potted trees/shrubs shall be planted in a staggered pattern in alternate rows.
6. MEASUREMENT AND PAYMENT
Payment for Vegetation, herbaceous plants will be made at the contract unit
price for each herbaceous plant that has been planted in accordance with the
plans and specifications. The Contractor shall provide a copy of the invoice to
the Inspector as documentation of the quantity of herbaceous plants. Each plant
may be counted after successful placement when necessary to verify invoice
quantities. Such payment will constitute full compensation for all labor,
materials, equipment and other items necessary and incidental to the
performance of the work.
Payment for Vegetation, rooted seedlings/rooted cuttings will be made at the
contract unit price for each rooted woody seedling or rooted, woody cutting that
has been planted in accordance with the plans and specifications. The
Contractor shall provide a copy of the invoice to the Inspector as documentation
of the quantity of rooted seedlings/cuttings. Each plant may be counted after
successful placement when necessary to verify invoice quantities. Such
payment will constitute full compensation for all labor, materials, equipment and
other items necessary and incidental to the performance of the work.
Payment for Vegetation, trees will be made at the contract unit price for each
potted tree/shrub that has been installed in accordance with the plans and
specifications. The Contractor shall provide a copy of the invoice to the
Inspector as documentation of the quantity of herbaceous plants. Each plant
may be counted after successful placement when necessary to verify invoice
quantities. Such payment will constitute full compensation for all labor,
materials, equipment and other items necessary and incidental to the
performance of the work.
7. ITEMS OF WORK AND CONSTRUCTION DETAILS
Items of work to be performed in conformance with this specification and the
construction details are:
(a) Bid Item 9, Vegetation, herbaceous plants
(1) This item shall consist of furnishing, transporting and installing
herbaceous plants on the bankfull bench in the project reach. The area
to be planted with plants shall consist of the left and right bankfull bench
in the project reach as shown on the plans.
(2) The herbaceous plants shall be planted after the area has been limed,
fertilized and seeded in accordance with Construction Specification 406
NRCS-NC 405-3 12/01
- Seeding, Sprigging and Mulching and after the installation of the
erosion control blanket in accordance with Construction Specification
404 - Erosion Control Blanket.
(3) The herbaceous plants shall be placed through the erosion control
blanket in accordance with the requirements of Construction
Specification 404 - Erosion Control Blanket.
(4) Adequate topsoil will be placed and hand-compacted around each
herbaceous planting.
(5) The Contractor shall sufficiently water the installed herbaceous plants at
least every 3 days, except when adequate rainfall occurs, until final
inspection and acceptance of the job. The watering.. shall begin on the
day that the herbaceous plants are installed.
(6) Measurement and payment shall be as specified in Section 6.
(b) Bid Item 10, Vegetation, rooted seedlings/rooted cuttings
(1) This item shall consist of furnishing, transporting and installing rooted
seedlings and rooted cuttings from the inner berm to the top of
streambank as shown on the drawings. The rooted seedlings/rooted
cuttings shall be an equal mixture of the species shown in Section 4.
Summersweet Clethra rooted seedlings shall be planted on all disturbed
areas on the right top of bank.
(2) The rooted seedlings/cuttings shall be planted after the area has been
limed, fertilized and seeded in accordance with Construction
Specification 406 - Seeding, Sprigging and Mulching and after the
installation of the erosion control blanket in accordance with
Construction Specification 404 - Erosion Control Blanket.
(3) The rooted seedling/cutting shall be placed through the erosion control
blanket in accordance with the requirements of Construction
Specification 404 - Erosion Control Blanket.
(4) Adequate topsoil will be placed and hand-compacted around each
rooted seedling/cutting.
(5) The Contractor shall sufficiently water the rooted seedlings/cuttings at
least every 3 days, except when adequate rainfall occurs, until final
inspection and acceptance of the job. The watering shall begin on the
day that the rooted seedlings/cuttings are installed.
(6) Measurement and payment shall be as specified in Section 6.
NRCS-NC 405-4 12101
(c) Bid Item 11, Vegetation, trees
(1) This item shall consist of furnishing, transporting and installing potted
trees. in the riparian zone at the top of the streambank as shown on the
drawings. A minimum of two rows of trees shall be planted on the left top
of bank.
(2) The trees shall be an equal mixture of the species shown in Section 5.
(3) Adequate topsoil will be placed and hand-compacted around each tree.
(4) The Contractor shall sufficiently water the rooted seedlings/cuttings at
least every 3 days, except when adequate rainfall occurs, until final
inspection and acceptance of the job. The watering shall begin on the
day that the trees are planted.
(5) Measurement and payment shall be as specified in Section 6.
NRCS-NC 405-5 12/01
CONSTRUCTION SPECIFICATION
406 SEEDING, SPRIGGING AND MULCHING
1. SCOPE
The work shall consist of preparing the area for treatment, furnishing and placing
seed, sprigs, mulch, fertilizer, inoculant, lime and other soil amendments, and
anchoring mulch in designated areas as specified.
2. SEEDING MIXTURES SOD SPRIGS AND DATES OF PLANTING
} The application rate per acre for seed mixtures, sprigs, or sod and date of
seeding or planting shall be as shown on the plans or as specified in Section 6.
3. SEEDBED PREPARATION AND TREATMENT
Areas to be treated shall be dressed to a smooth, firm surface. On sites where
equipment can operate on slopes safely, the seedbed shall be adequately
loosened (4 to 6 inches deep) and smoothed. Depending on soil and moisture
conditions, disking or cultipacking or both may be necessary to properly prepare
a seedbed. Ripping chisels or tools must not be spaced more than 12 inches
apart. On sites where equipment cannot operate safely, the seedbed shall be
prepared by hand methods by scarifying to provide a roughened soil surface so
that broadcast seed will remain in place.
If seeding is to be accomplished immediately following construction operations,
seedbed preparation may not be required except on compacted, polished, or on
freshly cut soil surfaces. The Inspector must approve areas where seedbed
preparation is not to be required.
Rocks larger than six (6) inches in diameter, trash, weeds, and other debris that
will interfere with seeding or maintenance operations shall be removed or
disposed of as specified in Section 6.
Seedbed preparation shall be discontinued when soil moisture conditions are
not suitable for the preparation of a satisfactory seedbed as determined by the
Engineer.
4. SEEDING, SPRIGGING, FERTILIZING, MULCHING, AND STABILIZING
All seeding or sprigging operations shall be performed in such a manner that the
seed and/or sprigs are applied in the specified quantities uniformly on the
designated areas. The method and rate of seed application shall be as
NRCS-NC 406-1 Rev. 8/01
specified in Section 6. Unless otherwise specified, seeding or sprigging shall be
accomplished within two (2) days after final grading is completed and approved.
Fertilizer, lime, and other soil amendments shall be applied as specified in
Section 6. When specified, the fertilizer and soil amendments shall be
thoroughly incorporated into the soil immediately following surface application.
The rate, amount, and kind of mulching or mesh shall be as specified in Section
6. Mulches shall be applied uniformly to the designated areas, and shall be
applied to areas seeded not later than two (2) working days after seeding has
been performed. Straw mulch material shall be stabilized within twenty-four (24)
hours of application by the use of a mulch crimper or equivalent anchoring tool
or by a suitable tackifier. When the mulch crimper or equivalent anchoring tool
is used, it shall have straight blades and be the type manufactured expressly for,
and capable of firmly punching the mulch into the soil. On sites where the
equipment can be safely operated, it shall be operated on the contour. On sites
where equipment cannot safely operate to perform the work required, hand
methods shall be used.
Asphalt emulsion tackifiers shall conform to the requirements of ASTM D 977,
Specification for Emulsified Asphalt. The tackifier shall be applied uniformly
over the mulch material at the specified rate, or by injecting it into the mulch
material as it is being applied.
The Contractor shall maintain the seeded and mulched areas until all work under
the contract has been completed and accepted. Maintenance shall consist of
the repair of areas damaged by water erosion, wind, fire, or other causes. Such
areas shall be repaired to re-establish the intended condition and to the design
lines and grades required by the contract. The areas shall be re-fertilized, re-
seeded, and re-mulched if necessary.
S. MEASUREMENT AND PAYMENT
For items of work for which specific unit prices are established in the contract,
each area treated will be measured as specified in Section 6 and the area
calculated to the nearest 0.1 acre. Payment for treatment will be made at the
contract unit price for each treatment and will constitute full compensation for
completion of the work.
Compensation for any item of work described in the contract but not listed in the
bid schedule will be included in the payment for the item of work to which it is
made subsidiary. Such items and the item(s) to which they are made subsidiary
are identified in Section 6.
NRCS-NC 406-2 Rev. 8/01
6. ITEMS OF WORK AND CONSTRUCTION DETAILS
Items of work to be performed in conformance with this specification and the
construction details are:
The percent purity and germination or pure live seed shall be no less than
shown below. The quality of all seed must meet the requirements of the North
Carolina Seed Law.
Total Minimum
% Germination
Minimum (Including
% Puri Hard Seed) %PLS
Grasses
Switchgrass (Panicum virgatum) 70 50 60
11 % PLS - Pure live seed, represents a value obtained by multiplying the
percent of purity by the percent germination and dividing by 100.
All seed will be subject to testing by an authorized representative of the North
Carolina Department of Agriculture.
Seed shall not contain more than 5% of other crop seed.
Seed bag tags shall be furnished as certification that the seed meets the quality
requirements. If the seed is tested in a commercial laboratory, the original copy
of the test report shall be furnished. No seed will be accepted with a test date
more than nine (9) months prior to the delivery date to the site. Each type of
seed shall be delivered in separate sealed containers and fully tagged unless
the Contracting Officer grants an exception in writing.
During handling and storing, the seed shall be cared for in such a manner that it
will be protected from damage by heat, moisture, rodents, or other damaging
factors.
The quality of all fertilizer shall comply with the requirements of the North
Carolina Fertilizer Law and with the rules and regulations adopted by the North
Carolina Board of Agriculture in accordance with the provisions of said law, in
effect at the time of sampling. The fertilizer must be the kind stated and must
contain at least the percent of available nitrogen, phosphoric acid and available
potash as shown in the grade analysis and/or invoice. All fertilizer will be
subject to sampling and testing by an authorized representative of the North
Carolina Department of Agriculture.
NRCS-NG 406-3 Rev. 8/01
Dry fertilizer shall have been manufactured from cured stock. During handling
and storing, the fertilizer shall be cared for in such a manner that it will be
protected against hardening, caking, or loss of plant food values. Any hardened
or caked fertilizer shall be replaced or pulverized to its original condition before
being used.
Limestone shall be agricultural grade ground dolomitic. It shall contain not less
than 85 percent of the combined calcium and magnesium carbonates.
The limestone shall be so graded that 100 percent will pass through U.S.
Standard 10-mesh screen, 40 percent will pass through U.S. Standard 100-mesh
screen, or other subsequent grading requirements, rules, and regulations of the
North Carolina Lime Law, adopted by the North Carolina Board of Agriculture, in
effect at the time of sampling. All limestone shall be subject to sampling and
testing by an authorized representative of the North Carolina Department of
Agriculture.
During handling and storing, the limestone shall be cared for in such a manner
that it will be protected against hardening or caking. Any hardened or caked
limestone shall be replaced or pulverized to its original condition before being
used.
Grain straw mulch shall contain no more than a minimum of grain or foreign
seed and be free from an excessive amount of restricted noxious weeds as
defined by the North Carolina Board of Agriculture at the time of use of the
mulch. Also, there shall be compliance with all applicable state and federal
domestic plant quarantines. The mulch material shall be air dry, threshed, free of
clumps, and reasonably light in color. It shall not be musty, moldy, caked, or
otherwise of low quality. The use of mulch that contains noxious weeds will not
be permitted.
All types of mulch shall be properly stacked to facilitate handling and checking
and covered to prevent damage during inclement weather prior to application.
a. Bid Item 8, Vegetation, seeding
(1) This item shall consist of applying lime and fertilizer, preparing a seedbed
and seeding to establish permanent vegetation on all disturbed areas.
These areas shall be seeded after all shaping and grading is completed
and no further construction operations that would disturb the seeded area
are anticipated. The disturbed areas shall be seeded as soon as
practical but no later than 24 hours after the completion of final grading.
(2) Seedbed preparation shall consist of shaping all areas so that each area
has positive drainage.
NRCS-NC 406-4 Rev. 8/01
(3) Apply two (2) tons of dolomitic limestone, one thousand (1,000) pounds of
10-10-10 fertilizer, and three hundred (300) pounds of superphosphate
per acre.
(4) For all areas the work shall be performed in the following sequence:
(a) Initial seedbed preparation.
(b) Uniformly apply limestone and fertilizer.
(c) Mix fertilizer and lime into the soil by disking or other method
approved by the Engineer. Complete seedbed preparation by
smoothing with appropriate equipment approved by the Engineer.
(d) After seedbed is smoothed, remove from the shaped areas any
woody material greater than 3" in diameter left on the surface, or
other obstructions that would interfere with mowing.
(e) Seed the plants as specified. A cyclone seeder, drill or cultipacker
seeder shall be used to apply seed evenly on freshly prepared
seedbed. When seed are broadcast, a cultipacker or other
appropriate equipment shall be used immediately following
seeding.
(f) If any disturbed area is hydraulically seeded, the fertilizer, seed,
and wood cellulose fiber mulch shall be mixed with water to a
slurry consistency. Use at the rate of 500 lbs. per acre where
straw mulch is to be applied. If no straw mulch is to be applied,
use at the rate of 1,500 lbs. per acre. The slurry shall be uniformly
sprayed over the area to be treated. The slurry must be applied
within one hour after the mixing operation is completed.
(5) Seeding shall be in accordance with the following table and seeding
mixtures and rates per acre will be governed by the approved dates.
NRCS-NC 406-5 Rev. 8101
Approved Date Lbs./Ac.
January 1 to 8
December 31 2
2
April 1 -July 31 20
September 1 - March 31 50
b.
Seed Mixture
Switchgrass (Panicum virgatum)
Virginia Wild Rye (Elymus virginicus)
Big Bluestem (Andropogon gerardii)
Browntop Millet
Annual Rye Grain
(6) Measurement and payment will be as shown in Section 5.
Bid Item 12, Mulch, straw
(1) This item shall consist of applying three thousand (3,000) pounds per
acre of straw mulch on any or all of the following areas as directed by the
Inspector:
(a) Selected disturbed and bare areas when an immediate ground
cover is desirable for minimizing erosion during construction
operations.
(b) Graded and bare areas where construction operations are
temporarily suspended. No area of more than one-half contiguous
acre in size is to be left unprotected more than 30 calendar days
except areas on which work is being continuously performed.
(c) Finished and completed areas where a delay in seeding to
establish permanent vegetation is desirable due to weather or
seeding conditions.
(d) All areas seeded to permanent vegetation except areas where an
erosion control blanket has been installed in accordance with the
requirements of Construction Specification 404, Erosion Control
Blanket.
(2) The materials shall conform to the requirements of this specification.
Delivery tickets showing quantity and quality of materials shall be
furnished the Engineer prior to using materials.
(3) Mulch materials shall be applied to the land surface in a reasonable
uniform thickness so that 75% of the surface area is covered. It is
essential to have uniform distribution of the mulch. Ties from baled mulch
materials shall be removed from the site.
NRCS-NC 406-6 Rev. 8/01
(4) Mulch shall be secured to the surface by one of the following methods:
(a) Mulch shall be secured by using a mulch-anchoring tool to press
the mulch into the soil. Pressing plates or blades shall be one-
fourth inch thick and spaced no more than 8 inches apart. Mulch
shall be pressed into the top 2 to 3 inches of the surface without
cutting or chopping the mulch.
On compact areas where mulch is to be applied for interim ground
protection preceding seedbed preparation, scarification of the soil
surface prior to mulch application may be necessary to get a
minimum of two inches penetration of the anchoring tool blades.
A weighed vehicle shall be used at the top of.slopes 3 to 1 or
steeper and on other areas designated by the Inspector to hold
equipment on the surface during anchoring operations if necessary
to prevent roughing up the surface or seedbed. Equipment
operations shall be on the approximate contour.
(b) Secure mulch on small areas by other methods as approved by the
Engineer.
(5) Measurement and payment will be as shown in Section 5.
NRCS-NC 406-7 Rev. 8/01
CONSTRUCTION SPECIFICATION
409. SAFETY FENCE/BARRIER
1. SCOPE
The work shall consist of installing a safety fence to establish and maintain
a safety barrier around the work area including the staging and stockpile
areas.
2. MATERIALS
The safety fence shall be made from high-density polyethylene. The color
of the safety fence shall be OSHA safety orange. The minimum height of
the fence shall be four (4) feet. The posts shall be a minimum of 1 "x 2" x
5' hardwood, 6 ft. x 1 "fiberglass t-posts or minimum 5' metal posts
designed for use with a safety fence.
3. INSTALLATION
The safety fence may be pre-assembled with the fence material pre-
attached to hardwood post or the safety fence and posts may be
assembled on site.
The posts shall be driven in the ground at least 12 inches. Corner
assemblies shall be installed at all points where the fence alignment
changes 20 degrees or more. End panels shall be installed at the
construction entrance to the site and at the downstream end of the safety
fence. The construction entrance shall be a gate or other barrier that can
be closed during non-work hours.
4. °MEASUREMENT'AND PAYMENT
The length of the safety fence will be measured to the nearest foot along
the profile of the fence, including gate openings. Payment for the fence
will be made at the contract unit price. Such payment will constitute full
compensation for all labor, materials, equipment and other items
necessary and incidental to the completion of the work.
Compensation for any item of work described in the contract but not listed
in the bid schedule will be included in the payment for the item of work to
which it is subsidiary.
5. ITEMS OF WORK AND CONSTRUCTION DETAILS
Items of work to be performed in conformance with this specification and
the construction details are:
N RCS-NC 409-1 12/01
Safety Fence
(a) Bid Item 14, Safety Fence
(1) This item of work shall consist of furnishing and installing a
safety fence around the perimeter of the entire work area on the
Tarboro High School side of the project area. The work area
shall include the staging area, stockpile area and work zone.
The safety fence shall be installed at the location staked in the
field by the Inspector.
(2) Measurement and payment shall be as specified in Section 4.
NRCS-NC 409-2 12/01
Safety Fence
CONSTRUCTION SPECIFICATION
421. EXCAVATION
1. SCOPE
The work shall consist of the excavation required by the drawings and
specifications and disposal of the excavated materials.
2. USE OF EXCAVATED MATERIALS
To the extent they are needed, all suitable materials from the specified
excavations shall be used in the construction of required permanent earthfill.
The Inspector will determine the suitability of materials for specific purposes.
The Contractor shall not waste or otherwise dispose of suitable excavated
materials.
3. DISPOSAL OF WASTE MATERIALS
All surplus or unsuitable excavated materials will be designated as waste. The
Contractor shall remove and dispose of all debris encountered. The Contractor
shall dispose of unsuitable and/or excess materials at the designated off-site
disposal area.
4. EXCAVATION LIMITS
Excavations shall comply with OSHA Construction Industry Standards (29CFR
Part 1926) Subpart P, Excavations, Trenching, and Shoring. All excavations
shall be completed and maintained in a safe and stable condition throughout the
total construction phase. Structure and trench excavations shall be completed to
the specified elevations and to the length and width required to safely install,
adjust, and remove any forms, bracing, or supports necessary for the installation
of the work. Excavations outside of the lines and limits shown on the drawings
or specified herein required to meet safety requirements shall be the
responsibility of the Contractor in constructing and maintaining a safe and stable
excavation.
6. OVER-EXCAVATION
Excavation in earth beyond the specified lines and grades is to be avoided. If
over-excavation occurs, the area shall be corrected by filling the resulting voids
with approved compacted earthfill, except that, if the earth is to become the
subgrade for riprap, rockfill, sand or gravel bedding, or drainfill, the voids may be
filled with material conforming to the specifications for the riprap, rockfill,
bedding or drainfill. Prior to correcting an over-excavation condition, the
Contractor shall review the planned corrective action with the Inspector and
obtain approval of the corrective measures.
NRCS-NC 421-1 4/00
Rev. 12/01
6. MEASUREMENT AND PAYMENT
Payment for Excavation will be made at the contract unit price established in the
contract. The pay limits shall be defined as follows:
a. The upper limit shall be the original ground surface as it existed prior to
the start of construction operations except that where excavation is
performed within areas designated for previous excavation or earthfill the
upper limit shall be the modified ground surface resulting from the
specified previous excavation or earthfill.
b. The lower and lateral limits shall be the true surface of the completed
excavation as directed by the Engineer.
Such payment will constitute full compensation for all labor, materials,
equipment, and all other items necessary and; incidental to the performance of
the work, except that extra payment for backfilling over-excavation will be made
in accordance with the following provisions:
Payment for backfilling over-excavation will be made only if the excavation
outside specified lines and grades is directed by the Engineer to remove
unsuitable material and if the unsuitable condition is not a result of the
Contractor's improper construction operations as determined by the Engineer.
Compensation for any item of work described in the contract but not listed in the
bid schedule will be included in the payment for the item of work to which it is
made subsidiary. Such items and the items to which they are made subsidiary
are identified in Section 7 of this specification.
7. ITEMS OF WORK AND CONSTRUCTION DETAILS
Items of work to be performed in conformance with this specification and the
construction details are:
(a) Bid Item 5 Excavation, unclassified
(1) This item shall consist of all excavation required to construct the
channel dimensions to the lines and grades shown on the drawings.
The work shall also include all excavation necessary to provide the
material needed to fill areas of the existing channel sections as shown
on the drawings.
(2) Channel excavation shall start on the upstream end of the project
reach as shown on the drawings and proceed in a downstream direction
in the reach to be restored. The work shall be completed in such a
manner so that each 100 linear feet of work on both sides of the channel
NRCS-NC 421-2 4/00
Rev. 12/01
is completed including seeding and placement of the erosion control
blanket before any work is started in the next downstream reach. The
active construction reach will be dewatered in accordance with
Construction Specification 402, Removal of Water prior to and during
the excavation operations until the 100 feet reach is completed.
(3) The Engineer may adjust the excavation limits to improve the channel
conditions during construction.
(4) Excavation shall bottom on bedrock when it lies above the lines and
grades shown on the drawings. Excavation into bedrock is not required.
Blasting should not be necessary and will not be allowed.
(5) The Contractor shall remove and dispose of all debris encountered,
including but not limited to, stumps, logs, and broken stone rubble. The
Contractor shall dispose of unsuitable and/or excess materials at the
local landfill. Disposal fees are the responsibility of the Contractor.
(6) Excavated material suitable for use as earthfill or backfill will be
temporarily stockpiled adjacent to the work area. The earthfill or backfill
will be placed as shown on the drawings in accordance with
Construction Specification 423, Earthfill.
(7) 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.
(8) All known utility locations are identified on the drawings. The Contractor
shall verify the location of utilities prior to excavation. The Contractor
shall be responsible for repairing any damage to existing structures or
utilities.
(9) Measurement and payment will be as specified in Section 6.
(10) The following item of work is subsidiary to this bid item:
(a) Earthfill as specified in Construction Specification 423.
(b) Subsidiary Item, Excavation, Rock Structures
(1) These items shall consist of the excavation and backfill associated with
the installation of Bid Item 6, Rock Structures to the lines and grades
shown on the drawings and/or discussed below.
(2) Channel excavation for this construction shall start on the upstream side
of the installation as shown on the drawings.
NRCS-NC 421-3 4/00
Rev. 12/01
(3) Excavation shall bottom on bedrock when it lies above the lines and
grades shown on the drawings. Excavation into bedrock is not required.
Blasting should not be necessary and will not be allowed.
(4) The Contractor shall remove and dispose of all debris encountered,
including but not limited to, stumps, logs, and broken stone rubble. The
Contractor shall dispose of unsuitable and/or excess materials at the
local landfill. Disposal fees are the responsibility of the Contractor.
(5) Excavated materials suitable for use, as earthfill will be stockpiled
adjacent to the work area.
(6) Unless otherwise approved by the Engineer, excavation to prepare the
subgrade for the,installation of the rock structures and the installation of
the rock structures shall be consecutive and continuous operations.
(7) 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.
(8) All known utility locations are identified on the drawings. The Contractor
shall verify the location of utilities prior to excavation. The Contractor
shall be responsible for repairing any damage to existing structures or
utilities.
(9) No separate payment will be made for Subsidiary Item, Excavation,
Rock Structures. Compensation for this item will be included in the
respective payment for the bid item for Rock Structures.
NRCS-NC 421-4 4/00
Rev. 12/01
CONSTRUCTION SPECIFICATION
423. EARTHFILL
1. SCOPE
The work shall consist of the construction of earthfills and earth backfills
required by the drawings and specifications.
Earthfill is composed of natural earth materials that can be placed and
compacted by construction equipment operated in a conventional manner.
Earth backfill is composed of natural earth materials placed and compacted
in confined spaces or adjacent to structures (including pipes) by means of
hand tamping, manually directed power tampers or vibrating plates, or
equivalent.
2. MATERIALS
All fill materials shall be obtained from required excavations and designated
or approved borrow-areas. The selection, blending, routing and disposition
of materials in the various fills shall be subject to approval by the Engineer.
Fill materials shall contain no frozen soil, sod, brush, roots or other
perishable materials. Rock particles larger than the maximum size specified
for each type of fill shall be removed prior to compaction of the fill.
The types of materials used in the various fills shall be as listed and
described in the specifications and drawings.
3. FOUNDATION PREPARATION
Foundations for earthfill shall be stripped to remove vegetation and other
unsuitable materials or shall be excavated as specified.
Except as otherwise specified, earth foundation surfaces shall be graded to
remove surface irregularities and shall be scarified parallel to the axis of the
fill or otherwise acceptably scored and loosened to a minimum depth of two
(2) inches. The moisture content of the loosened material shall be controlled
as specified for the earthfill, and the surface materials of the foundation shall
be compacted and bonded with the first layer of earthfill as specified for
subsequent layers of earthfill.
Earth abutment surfaces shall be free of loose, uncompacted earth in excess
of two inches in depth normal to the slope and shall be at such a moisture
content that the earthfill can be compacted against them to produce a good
bond between the fill and the abutments.
NRCS-NC 423-1 4/00
Rev. 12/01
Rock foundation and abutment surfaces shall be cleared of all loose
materials by hand or other effective means and shall be free of standing
water when fill is placed upon them. Occasional rock outcrops in earth
foundations for earthfill, except in dams and other structures designed to
restrain the movement of water, shall not require special treatment if they do
not interfere with compaction of the foundation and initial layers of the fill
and/or the bond between the foundation and the fill.
Foundation and abutment surfaces shall be not steeper than one (1)
horizontal to one (1) vertical unless otherwise specified. Test pits or other
cavities shall be filled with compacted earthfill conforming to the
specifications for the earthfill to be placed upon the foundation.
4. PLACEMENT
Earthfill shall not be placed until the required excavation and foundation
preparations have been completed and the foundation has been inspected
and approved by the Engineer. Earthfill shall not be placed upon a frozen
surface, nor shall snow, ice, or frozen material be incorporated in the earthfill
matrix.
Earthfill shall be placed in approximately horizontal layers. The thickness of
each layer before compaction shall not exceed the maximum thickness
specified in Section 10 or shown on the drawings. Materials placed by
dumping in piles or windrows shall be spread uniformly to not more than the
specified thickness before being compacted.
Hand compacted earth backfill shall be placed in layers whose thickness
before, compaction does not exceed the maximum thickness specified for
layers of earth backfill compacted by manually directed power tampers.
Earth backfill shall be placed =in a manner that will prevent damage to the -
structures and will allow the structures to assume the loads from the earth
backfill fill gradually and uniformly. The height of the earth backfill adjacent
to a structure shall be increased at approximately the same rate on all sides
of the structure.
5. CONTROL OF MOISTURE CONTENT
During placement and compaction of earthfill and earth backfill, the moisture
content of the materials being placed shall be maintained within the specified
range.
The application of water to the earthfill materials shall be accomplished. at the
borrow areas insofar as practicable. Water may be applied by sprinkling the
materials after placement on the earthfill, if necessary. Uniform moisture
distribution shall be obtained by disking.
NRCS-NC 423-2 4/00
Rev. 12/01
Material that is too wet when deposited on the earthfill shall either be
removed or be dried to the specified moisture content prior to compaction.
If the top surface of the preceding layer of compacted earthfill or a foundation
or abutment surface in the zone of contact with the earthfill becomes too dry
to permit suitable bond it shall either be removed or scarified and moistened
by sprinkling to an acceptable moisture content prior to placement of the next
layer of earthfill.
6. COMPACTION
Earthfill. Earthfill shall be compacted according to the following
requirements:
Class C compaction. Each layer of earthfill shall be compacted by the
specified number of passes of the type and weight of roller or other
equipment specified, or by an approved equivalent method. Each
pass shall consist of at least one passage of the roller wheel or drum
over the entire surface of the layer.
Earth backfill. Earth backfill adjacent to structures shall be compacted to a
density equivalent to that of the surrounding in-place earth materials or
adjacent required earthfill or earth backfill. Compaction shall be
accomplished by means of hand tamping or manually directed power
tampers, plate vibrators, walk-behind, miniature, or self-propelled rollers.
Unless otherwise specified, heavy equipment including backhoe mounted
powertampers, or vibrating compactors and manually directed vibrating
rollers, shall not be operated within two (2) feet of any structure. Towed or
self-propelled vibrating rollers shall not be operated within five (5) feet of any
structure. Compaction by means of drop weights operating from a crane or
hoist will not be permitted.
7. REWORKING OR REMOVAL AND REPLACEMENT OF DEF
Earthfill placed at densities lower than the specified minimum density or at
moisture contents outside the specified acceptable range of moisture content
or otherwise not conforming to the requirements of the specifications shall be
reworked to meet the requirements or removed and replaced by acceptable
earthfill. The replacement earthfill and the foundation, abutment and earthfill
surfaces upon which it is placed shall conform to all requirements of this
specification for foundation preparation, approval, placement, moisture
control and compaction.
NRCS-NC 423-3 4/00
Rev. 12/01
8. TESTING
During the course of the work, the Engineer will perform such quality
assurance tests as are required to identify materials; determine compaction
characteristics; determine moisture content; and determine density of earthfill
in-place. Tests performed by the Engineer will be used to verify that the
earthfills conform to contract requirements of the specifications and not as a
replacement for the Contractor's quality control program.
10. ITEMS OF WORK AND CONSTRUCTION DETAILS
Items of work to be performed in conformance with this specification and the
construction details are:
a. Subsidiary Item, Earthfill
1) This item shall consist of placing and compacting all earthfill
necessary to backfill designated areas in the existing channel as
shown on the drawings and as described below.
2) The active construction reach in the channel of 100 linear feet or
less shall be dewatered in accordance to Construction Specification
402. Removal of Water prior to and during earthfill operations that
are conducted inside the channel banks. Dewatering shall continue
until the earthfill area has been seeded and the erosion control
blanket installed. [Note: An alternative plan for dewatering that
would dewater the entire construction reach during the active
construction phase in the channel is an acceptable alternative to
dewatering in 100 linear feet reaches.]
3) Sloughed areas in the slope shall be corrected by shaping the slope
to provide 'a uniform subgrade for the backfill operation.
4) The sources of earthfill shall be the required channel excavation as
shown on the drawings.
5) All earthfill shall be placed to the following specifications unless
shown otherwise on the plans:
(a) The moisture content of the fill material shall be maintained as
high as attainable within the limits required to:
(i) prevent bulking or dilatance of the material under the action
of the hauling or compacting equipment;
(ii) prevent the adherence of the fill material to the treads and
tracks of the equipment;
NRCS-NC 423-4 4/00
Rev. 12/01
(iii) 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.
(b) The maximum layer thickness before compaction shall be as
follows:
(i) Hand placed and compacted - 4 inches.
(ii) Machine placed and compacted - 9 inches.
(c) Compaction shall be Class C accomplished by power tampers or
by three (3) passes of a sheepsfoot roller unless otherwise
approved by the Engineer.
No separate payment will be made for earthfill. Compensation for this item will
be included in the payment for Bid Item 2. Pollution Control; Bid Item 3. Pollution
Control silt fence, Bid Item 5, Excavation, unclassified; and Bid .Item 6. Rock
Structures.
NRCS-NC 423-5 4/00
Rev. 12/01
CONSTRUCTION SPECIFICATION
461. ROCK STRUCTURES
1. SCOPE
The work shall consist of the placement of rock riprap and/or the
construction of natural rock or rock riprap structures including rock vanes,
J-hook vanes, rock cross vanes, rock sills, and/or outlet structures. The
work shall consist of furnishing, transporting and installing materials to
construct the rock structures, including geotextile where specified, in
accordance with the plans and specifications.
2. MATERIALS
Testing performed on rock or aggregate shall meet the requirements of
Section 1042 and Section 1005 of N.C. Department of Transportation's
Standard Specifications for Roads and Structures, July 1995 edition.
Documentation of testing performed for NCDOT is acceptable to meet this
requirement. When rock is supplied from a source other than the
approved source, documentation of testing of rock riprap that has been
completed for compliance with N.C. Department of Transportation
specifications no more than one year prior to installation of the rock may
be considered as adequate documentation for compliance with the
requirements of this standard.
Rock riprap shall conform to the requirements of this specification or, if so
specified, shall be obtained from preapproved sources. Individual rocks
shall be dense, sound and free from cracks, seams, and other defects.
The rocks shall be rectangular in shape except as otherwise specified.
Flat rocks are recommended since they are more adapted to the intended
use. 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 or as specified
in this document. The rock shall be free from dirt, clay, sand, rock fines
and other materials not meeting the required gradation limits.
Coarse aggregate (stone) shall conform to the requirements of this
specification or, if so specified, shall be obtained from preapproved
sources. Aggregates shall be composed of clean, hard, durable mineral
particles free from organic matter, clay balls, soft particles or other
substances that would interfere with the free-draining properties of the
aggregates. Aggregates shall be stored and handled by methods that
prevent segregation of particle sizes or contamination by mixing with other
materials.
NRCS-NC 4614 7/99
Rev. 12/01
The geotextile shall conform to the requirements of Construction
Specification 495 - Nonwoven Geotextiles.
3. SUBGRADE PREPARATION
The subgrade surfaces on which the rock or geotextile 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 423,
Earthfill. The surface shall be reasonably smooth and free of loose rock
and clods, holes, depressions, projections, muddy conditions and standing
or flowing water. The rock or geotextile shall not be placed until the
prepared subgrade has been inspected and approved by the Engineer.
4. PLACEMENT
The rock shall be placed by equipment on the surfaces and to the depths
specified. In all rock structures, 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, except the rock sill, 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 otherwise directed by the Inspector.
5. MEASUREMENT AND PAYMENT
For items of work, for which specific unit prices are established in the
contract, the quantity of each type of rock riprap placed within the
specified limits will be measured to the nearest ton by actual weight. For
each load of rock riprap placed as specified, the Contractor shall furnish to
the Engineer a statement-of-delivery ticket showing the weight to the
nearest 0.1 ton.
Compensation for any item of work described in the contract but not listed
in the bid schedule will be included in the payment for the item of work to
NRCS-NC 461-2 7/99
Rev. 12/01
which it is made subsidiary. Such items and the items to which they are
made subsidiary are identified in Section 6 of this specification.
6. ITEMS OF WORK AND CONSTRUCTION DETAILS
Items of work to be performed in conformance with this specification and
the construction details are:
(a) Bid Item 6. Rock Structures
(Rock Cross Vanes, Rock Vanes, Rock Sills, Step-Pool
Structures, and Storm Drain Outlet Protection)
(1) This item shall consist of furnishing, transporting and installing
materials to construct the rock cross vanes, rock sills, step-pool
structures, and storm drain outlet protection in accordance with
the plans and specifications.
(2) =All rock structures shall be installed after the active construction ,
reach in the channel of 100 linear feet or less has been
dewatered in accordance with Construction Specification 402,
Removal of Water and prior to the start of work in the next
downstream reach.
(3) The rock for the rock cross vanes, rock vanes, and the in-
channel step-pool structure shall be quarry stone that meets
the following criteria:
Length - Minimum 2 feet, Maximum 6 feet
Width - Minimum 1 foot, Maximum 3 feet
Thickness - Minimum 0.5 foot, Maximum 2.5 feet
Flat rectangular rocks with two or more flat surfaces are
preferred since they are more adapted to the intended use.
The weight of any individual rock shall be 500 pounds or
greater. The estimated quantity of rock for the rock cross
vanes is 250 tons.
(4) The Contractor shall submit the source of rock to the
Contracting Officer's Representative for approval prior to the
delivery of rock to the site. Approval of the rock source by the
COR does not relieve the Contractor of the necessity to provide
rock that meets the requirements of this specification. To meet
the requirements specified in Item 2 above, a special order for
rock will need to be placed at the quarry in order to obtain rock
in the specified size and weight ranges.
NRCS-NC 461-3 7/99
Rev. 12/01
(5) N.C. DOT Class II rock riprap shall be used for all rock
installations except as noted in Item 2.
(6) Class I nonwoven geotextile shall be placed under structures
as shown on the drawings and in accordance with Construction
Specification 495 - Nonwoven Geotextiles.
(7) For the step-pool structures, N.C. DOT No. 5 coarse aggregate
(washed stone) shall be used to backfill the voids in the rock
riprap lining. The estimated quantity of N.C. DOT No. 5 coarse
aggregate is 44 tons.
(8) The statement-of-delivery ticket shall be a public
weightmaster's certified weight certificate as defined in Section
106-7, Scales and Public Weightmaster in the N.C. Department
of Transportation's Standard Specifications for Roads and
Structures, July 1995 edition.
(9) The rock, washed stone and geotextile used to construct the
temporary sediment basins and sediment pits shall be placed in
accordance with Construction Specification 401, Pollution
Control. This item of work is subsidiary to Bid Item 2, Pollution
Control.
(10)Placement of the rock in the rock cross vanes and rock sills
shall be accomplished by use of a hydraulic excavator
equipped with a hydraulic thumb. The excavator shall have a
minimum operating weight of 25,000 pounds unless otherwise
approved by the Engineer. Some arrangement of the rock by
hand may be required once the rock has been placed by
equipment in the structures.
(11)The following items of work are subsidiary to this bid item:
(a) Excavation, rock structures as specified in Construction
Specification 421, Excavation.
(b) Geotextiles, nonwoven, rock structures as specified in
Construction Specification 495, Nonwoven Geotextiles.
NRCS-NC 461-4 7/99
Rev. 12/01
CONSTRUCTION SPECIFICATION
470. ROOT WADS / LOG SILLS
1. SCOPE
The work shall consist of furnishing all labor, materials and equipment for the
installation of root wads or log sills. The work shall include harvest, transport
and installation of the rootwad (with tree trunk attached) or log sill and
excavation as needed to stabilize and/or protect the streambank. 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.
2. MATERIALS
The tree trunk with,attached root wad 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 trunk. The length and diameter of the
trunk shall be as indicated on the drawings or as specified in Section 6. The
trees to be harvested for use as root wads or log sills shall be clearly marked
prior to the start of construction.
Rock riprap used as anchor rock shall conform to the requirements of
Construction Specification 461 or, if so specified may be obtained from
preapproved sources.
3. SITE PREPARATION
The stream restoration 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. Obstructions to flow in the channel shall be
removed only as necessary to prevent stream flow from being directed toward
unstable streambanks. 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 as shown in the drawings.
4. INSTALLATION OF ROOT WAD OR LOG SILL
The tree trunk attached to the root wad may be driven into place or installed
in a dug trench. The preferred method of installation is to drive the trunk into
NRCS-NC 470-1 12/01
the streambank. When trenching is necessary, 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 trunk of
the root wad and the same length as the trunk. The material removed during
the excavation process shall be stockpiled and used for backfill. The root
wad shall be installed with the trunk 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. When installed as a log sill, the root
wad shall be removed and the remaining trunk shall be installed by driving or
trenching. Each trunk will be placed in a separate trench. One or more large
rocks may be used to anchor the root wad or log sill in place when it is
installed by trenching.
Each trench will be backfilled 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.
5. MEASUREMENT AND PAYMENT
For items of work for which specific unit prices are established in the contract,
the quantity of each root wad or log sill installed will be determined by actual
count. Payment will be made at the contract unit price. Such payment will
constitute full compensation for furnishing, transporting, and installing the root
wad with trunk or log sill.
6. ITEMS OF WORK AND CONSTRUCTION DETAILS
a. Bid Item 7, Root Wads / Log Sills
(1) This item shall consist of installing root wads with attached tree
trunk or log sills in accordance with the plans and specifications.
(2) The construction inspector shall determine when the root wad of a
harvested tree is too large for installation in the stream. When a
root wad is determined to be too large, it shall be cut away from the
trunk and the remaining trunk shall be installed as a log sill.
(3) The tree trunk attached to the root wad shall be a minimum length
of 10 feet and a maximum length of 20 feet. The trunk shall have a
minimum diameter breast height (DBH) of 10 inches and a
maximum diameter of 30 inches.
(4) The preferred method of installation for the root wads and log sills
is by driving into the streambank using the bucket of a hydraulic
NRCS-NC 470-2 12/01
excavator or similar equipment. The tree trunk shall be driven into
the bank with the minimum amount of disturbance that is practical.
(5) Measurement and payment will be as described in Section 5.
(6) The following item of work is subsidiary to this bid item:
(a) Excavation, Root Wads as specified in Construction
Specification 421, Excavation.
(7) No separate payment will be made for the harvest of materials to
be used in the root wads or log sills under this item of work.
Payment for the harvest of materials will be subsidiary to this item
of work.
(8) No separate payment will be made for the disposal of woody
debris, laps, and harvested trees that are unsuitable for use as root
wads or log sills. Payment for the disposal of the waste materials
will be subsidiary to this item of work. The waste materials shall be
disposed of in the local landfill. Disposal fees are the responsibility
of the Contractor.
(9) Payment for the anchor rock associated with this item of work shall
be included in Bid Item 6, Rock Structures as specified in
Construction Specification 461, Rock Structures.
NRCS-NC 470-3 12/01
CONSTRUCTION SPECIFICATION
495. NONWOVEN GEOTEXTILES
1. SCOPE
This work shall consist of furnishing all materials, equipment, and labor necessary for
the installation of nonwoven geotextiles.
2. MATERIALS
Fibers (threads and yarns) used in the manufacture of geotextile shall consist of
synthetic polymers composed of a minimum of 85 percent by weight polypropylenes,
polyesters, polyamides, polyethylene, polyolefins, or polyvinyl idene-chlorides. They
shall be formed into a stable network of filaments or yarns retaining dimensional
stability relative to each other. The geotextile shall be free of defects and conform to
the physical requirements contained in Table 2. The geotextile shall be free of any
chemical treatment or coating that significantly reduces its porosity. Fibers shall
contain stabilizers and/or inhibitors to enhance resistance to ultraviolet light.
Thread used for factory or field sewing shall be of contrasting color to the fabric and
made of high strength polypropylene, polyester, or polyamide thread. Thread shall be
as resistant to ultraviolet light as the geotextile being sewn.
Nonwoven fabrics shall be manufactured from individual fibers formed into a random
pattern with distinct but variable small openings, retaining their position relative to
each other when bonded by needle punching, heat, or resin bonding. The use of
nonwovens, other than the needle punched geotextiles, is somewhat restricted (see
Note 3 of Table 2).
The geotextile shall meet the specified requirements in Table 2 for the product style
shown on the label. Product properties as listed in the lastest edition of the
"Specifiers Guide", Gbotechnical Fabrics Report, ADDRESS: Industrial Fabrics
Association International, 1801 County Road BW, Roseville, MN 55113-4061; and
that represents minimum average roll values, will be acceptable documentation that
the product style meets the requirements of these specifications.
NRCS-NC 495-1 07/01
TABLE 2. REQUIREMENTS FOR NON-WOVEN GEOTEXTILES
Property Test Method Class I Class II Class Ill Class IV 3/
Tensile Strength ASTM D 4632 180 minimum 120 minimum 90 minimum 115 min.
(pounds) 1/ Grab Test
Bursting Strength ASTM D 3786 320 minimum 210 minimum 180 minimum NA
(psi) 1/ Diaphragm Tester
Elongation at Failure ASTM D 4632 >_50 >_50 >_50 >_50
(percent) 1/
Puncture (pounds) ASTM D 4833 80 minimum 60 minimum 40 minimum 40 minimum
Ultraviolet Light ASTM D 4355 70 minimum 70 minimum 70 minimum 70 minimum
(percent residual 150-hours exposure
tensile strength)
Apparent Opening Size ASTM D 4751 As specified As specified As specified As specified
(AOS) max. # 40 2/ max. # 40 2/ max. # 40 2/ max. # 40 2/
Permittivity sec' ASTM D 4491 0.70 minimum 0.70 minimum 0.70 minimum 0.10 min.
1/ Minimum average roll value (weakest principal direction)
2/ U. S. Standard Sieve Size.
3/ Heat-bonded or resin-bonded geotextile may be used for Class III and IV. They are particularly well suited
for Class IV. Needle-punched geotextiles are required for all other classes.
NRCS-NC 495-2 07/01
3. SHIPPING AND STORAGE
The geotextile shall be shipped/transported in rolls wrapped with a cover for
protection from moisture, dust, dirt, debris, and ultraviolet light. The cover shall
be maintained undisturbed to the maximum extent possible prior to placement.
Prior to use, the geotextile shall be stored in a clean dry location, out of direct
sunlight, not subject to extremes of either hot or cold temperatures.
Each roll of geotextile shall be labeled or tagged to clearly identify the brand,
Class and the individual production run in accordance with ASTM D 4873.
Receiving, storage, and handling at the job site shall be in accordance with the
requirements listed in ASTM D 4873.
4. SURFACE PREPARATION
The surface on which the geotextile is to be placed shall be graded to the neat
lines and grades as shown on the drawings. The surface shall be reasonably
smooth and free of loose rock and clods, holes, depressions, projections, muddy
conditions and standing or flowing water (unless otherwise specified in Section 7
of this specification).
5. PLACEMENT
Prior to placement of the geotextile, the soil surface will be reviewed for quality
assurance of the design and construction. The geotextile shall be placed on the
approved prepared surface at the locations and in.accordance with the details
shown on the drawings and specified in Section 7 of this specification. The
geotextile shall be unrolled along the placement area and loosely laid, without
stretching, in such a manner that it will conform to the surface irregularities when
materials are placed on or against it. The geotextile may be folded and
overlapped to permit proper placement in designated area(s).
The geotextile shall be joined by overlapping a minimum of 18 inches (unless
otherwise specified), and secured against the underlying foundation material.
Securing pins, approved and provided by the geotextile manufacturer, shall be
placed along the edge of the panel or roll material to adequately hold it in place
during installation. Pins shall be steel or fiberglass formed as a "U", "L", or "T"
shape or contain "ears" to prevent total penetration through the geotextile. Steel
washers shall be provided on all but the "U" shaped pins. The upstream or up-
slope geotextile shall overlap the abutting down-slope geotextile. At vertical
laps, securing pins shall be inserted through the bottom layers along a line
through approximately the mid-point of the overlap. At horizontal laps and
across slope laps, securing shall be inserted through the bottom layer only.
Securing pins shall be placed along a line approximately two (2) inches in from
the edge of the placed geotextile at intervals not to exceed 12 feet unless
otherwise specified. Additional pins shall be installed as necessary and where
appropriate, to prevent any undue slippage or movement of the geotextile. The
NRCS-NC 495-3 07/01
use of securing pins will be held to the minimum necessary. Pins are to remain
in-place unless otherwise specified.
Should the geotextile be torn or punctured, or the overlaps or sewn joint
disturbed, as evidenced by visible geotextile damage, subgrade pumping,
intrusion, or grade distortion, the backfill around the damaged or displaced area
shall be removed and restored to the original approved condition. The repair
shall consist of a patch of the same type of geotextile being used and overlaying
the existing geotextile. Geotextile panels joined by overlap shall have the patch
extend a minimum of two (2) feet from the edge of any damaged area.
6. MEASUREMENT AND PAYMENT
For items of work for which specific unit prices are established in the contract,
the quantity of geotextile for each type placed within the specified limits will be
determined to the nearest specified unit by computing the area of the actual roll
size, or partial roll size installed. The computed area will include the amount
required for overlap, seams, and anchorage as specified. Payment will be made
at the contract unit price. Such payment will constitute full compensation for the
completion of the work.
The following provisions apply to all methods of measurement and payment.
Compensation for any item of work described in the contract but not listed in the
bid schedule will be included in the payment for the item of work to which it is
made subsidiary. Such items and the items to which they are made subsidiary
are identified in Section 7 of this specification.
7. ITEMS OF WORK AND CONSTRUCTION DETAILS
Items of work to be performed in conformance with this specification and the
construction details are:
a. Subsidiary item Geotextiles, nonwoven, pollution control
(1) This item shall consist of furnishing and installing the nonwoven
geotextile fabric under the rock in the sediment basins. The estimated
amount of geotextile fabric is 100 square yards.
(2) The geotextile fabric shall be Class I as specified in Table 2.
(3) No separate payment will be made for Geotextiles, nonwoven, pollution
control. Compensation for this item will be included in the payment for
Bid Item 2. Pollution Control
NRCS-NC 495-4 07/01
b. Subsidiary item Geotextiles, nonwoven, rock structures
(1) This item shall consist of furnishing and installing the nonwoven
geotextile fabric under the bottom and sides of the rock in the rock cross
vanes, rock vanes, rock sills, and step-pool structures as shown on the
drawings. The estimated quantity of geotextile fabric is 700 square
yards.
(2) The geotextile shall be Class I nonwoven as specified in Table 2.
(3) No separate payment will be made for Geotextiles, nonwoven, rock
structures. Compensation for this item will be included in the payment for
Bid Item 6. Rock Structures.
NRCS-NC 495-5 07/01