19980435 Ver 1_Complete File_19980514

State of North Carolina
Department of Environment
and Natural Resources
Division of Water Quality
James B. Hunt, Jr., Governor
Wayne McDevitt, Secretary
A. Preston Howard, Jr., P.E., Director
A74464
NCDENR
NORTH CAROLINA DEPARTMENT OF
ENVIRONMENT AND NATURAL RESOURCES
May 27, 1998
Warren County
DWQ Project 980435
APPROVAL of 401 Water Quality Certification
Ms. Loria Williams
County of Warren
PO Box 619
Warrenton, NC 27589
Dear Ms. Williams:
You have our approval, in accordance with the attached conditions and those listed below, for the
purpose of installing a sewer line in Warrenton, as you described in your application dated May 14, 1998.
After reviewing your application, we have decided that this impact is covered by General Water Quality
Certification Number 3101. This Certification allows you to use Nationwide Permit Number 12 when it is
issued by the Corps of Engineers. In addition, you should get any other federal, state or local permits before
you go ahead with your project including (but not limited to) Sediment and Erosion Control, Coastal
Stormwater, Non-Discharge and Water Supply Watershed regulations. This approval will expire when the
accompanying 404 or CAMA permit expires unless otherwise specified in the General Certification.
This approval is only valid for the purpose and design that you described in your application except as
modified below. If you change your project, you must notify us and you may be required to send us a new
application for a new certification. If the property is sold, the new owner must be given a copy of this
Certification and approval letter and is thereby responsible for complying with all conditions. If total wetland
fills for this project (now or in the future) exceed one acre, compensatory mitigation may be required as
described in 15A NCAC 2H .0506 (h) (6) and (7). For this approval to be valid, you must follow the
conditions listed in the attached certification.
If you do not accept any of the conditions of this certification, you may ask for an adjudicatory hearing.
You must act within 60 days of the date that you receive this letter. To ask for a hearing, send a written
petition conforming to Chapter 150B of the North Carolina General Statutes to the Office of Administrative
Hearings, P.O. Box 27447, Raleigh, N.C. 27611-7447. This certification and its conditions are final and
binding unless you ask for a hearing.
This letter completes the review of the Division of Water Quality under Section 401 of the Clean Water
Act. If you have any questions, please telephone John Domey at 919-733-1786.
Rnince oward, . E.
Attachment
cc: Wilmington District Corps of Engineers
Corps of Engineers Raleigh Field Office
Raleigh DWQ Regional Office
Mr. John Domey
Central Files
980435.1tr
Division of Water Quality • Non-Discharge Branch
4401 Reedy Creek Rd., Raleigh, NC 27607 Telephone [phone] FAX [phone]
An Equal Opportunity Affirmative Action Employer • 50% recycled/ 10% post consumer paper

DEM ID:

NATIONWIDE PERMIT REQUESTED (PROVIDE NATIONWIDE PERMIT #):
PRE-CONSTRUCTION NOTIFICATION APP ,CATION
FOR NATIONWIDE PERMITS THAT REQUIRE : \`` ?+ r
1) NOTIFICATION TO THE CORPS OF ENGINEERS
2) APPLICATION FOR SECTION 401 CERTIFICATION
3) COORDINATION WITH THE NC DIVISION OF COASTAL MANIOEME
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: Warren County Board of Commissioners
2. MAILING ADDRESS: PO Box 619
SUBDIVISION NAME:
CITY: Warrenton STATE:
NC
ZIP CODE:
27589
PROJECT LOCATION ADDRESS, INCLUDING SUBDIVISION NAME (IF DIFFERENT FROM
MAILING ADDRESS ABOVE): Along SR 1210 in Warren County, NC
3. TELEPHONE NUMBER (HOME): N/A
(WORK) : 919-257-3115
4. IF APPLICABLE:-AGENT'S NAME OR RESPONSIBLE CORPORATE OFFICIAL, ADDRESS,
PHONE NUMBER: Loria D. Williams, County Manager
PO Box 619, Warrenton, NC 27589
919-257-3115
5. LOCATION OF WORK (PROVIDE A MAP, PREFERABLY A COPY OF USGS TOPOGRAPHIC
MAP OR AERIAL PHOTOGRAPHY WITH SCALE):
COUNTY: Warren NEAREST TOWN OR CITY: Warrenton, NC
(See project vicinity map and copy from USGS Topographic maps attached)
'? +•' __ - CORPS ACTION ID:
1

SPECIFIC LOCATION (INCLUDE ROAD
NUMBERS, LANDMARKS, ETC.): Along SR 1210 from the NCDOT Welcome Center
located on southbound I-85 to the intersection of SR 1210 and US Hwy 1/158.
6. IMPACTED OR NEAREST STREAM/RIVER: Unnamed tributaries to Blue Mud Creek
RIVER BASIN: Roanoke
7a. IS PROJECT LOCATED NEAR WATER CLASSIFIED AS TROUT, TIDAL SALTWATER
(SA), HIGH QUALITY WATERS (HQW), OUTSTANDING RESOURCE WATERS (ORW), WATER
SUPPLY (WS-1 OR WS-II) ? YES [ ] NO [X] IF YES, EXPLAIN:
7b., IS THE PROJECT LOCATED WITHIN A NORTH CAROLINA DIVISION OF COASTAL
MANAGEMENT AREA OF ENVIRONMENTAL CONCERN (AEC)? YES [ ] NO [X]
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?
N/A
8a. HAVE ANY SECTION 404 PERMITS BEEN PREVIOUSLY REQUESTED FOR USE ON
THIS PROPERTY? YES [X] NO [ ] IF YES, PROVIDE ACTION I.D. NUMBER OF
PREVIOUS PERMIT AND ANY ADDITIONAL INFORMATION (INCLUDE PHOTOCOPY OF 401'
CERTIFICATION): Action ID 199602190
8b. ARE ADDITIONAL PERMIT REQUESTS EXPECTED FOR THIS PROPERTY IN THE
FUTURE? YES [ ] NO [X] IF YES, DESCRIBE ANTICIPATED WORK: None
9a: ESTIMATED TOTAL NUMBER OF ACRES IN TRACT OF LAND: 12.2 acres
9b. ESTIMATED TOTAL NUMBER OF ACRES OF WETLANDS LOCATED ON PROJECT SITE:
0.02 acre
2
10a. NUMBER OF ACRES OF WETLANDS IMPACTED BY THE PROPOSED PROJECT BY:
FILLING: 0 acre EXCAVATION: 0.02 acre
FLOODING: 0 acre OTHER:
DRAINAGE: 0 acre. TOTAL ACRES TO BE IMPACTED: .02 acre
10b. (1) STREAM CHANNEL TO BE IMPACTED BY THE PROPOSED PROJECT (IF
RELOCATED, PROVIDE DISTANCE BOTH BEFORE AND AFTER RELOCATION) :
LENGTH BEFORE: 30 FT AFTER: 30 FT

WIDTH BEFORE (based on normal high water contours): 10 FT

WIDTH AFTER: 10 FT

AVERAGE DEPTH BEFORE:' 2 FT -AFTER: 2 FT

(2) STREAM CHANNEL IMPACTS WILL RESULT FROM: (CHECK ALL THAT APPLY)
OPEN CHANNEL-RELOCATION: PLACEMENT OF PIPE IN CHANNEL:
CHANNEL EXCAVATION: CONSTRUCTION OF 'A DAM/FLOODING:

OTHER: Channel excavation due to pipelines installed under channels
11. IF CONSTRUCTION OF A POND IS PROPOSED, WHAT IS THE SIZE OF THE
WATERSHED DRAINING TO THE POND? N/A
WHAT IS THE EXPECTED POND SURFACE AREA? N/A
12. DESCRIPTION OF PROPOSED WORK INCLUDING DISCUSSION OF TYPE OF
MECHANICAL EQUIPMENT TO BE USED (ATTACH PLANS: 8 1/2" X 11" DRAWINGS
ONLY): Attached Exhibits detail areas of wetland crossings. Pipe trench
excavation will most likely be by backhoe.
13. PURPOSE OF PROPOSED WORK: Installation of public water supply mains and
sewer collection mains.
3
14. STATE REASONS WHY IT IS BELIEVED THAT THIS ACTIVITY MUST BE CARRIED
OUT IN WETLANDS. (INCLUDE ANY MEASURES TAKEN TO MINIMIZE WETLAND
IMPACTS): Lack of adequate cover or required location prevents installation
of mains adiacent to roadway: wetland impacts will be minimized by use of silt
fence, rip rap and .-jute matting.
15. YOU ARE REQUIRED TO CONTACT THE U.S. FISH AND WILDLIFE SERVICE
(USFWS) AND/OR NATIONAL MARINE FISHERIES SERVICE (NMFS) (SEE AGENCY
ADDRESSES SHEET) REGARDING THE PRESENCE OF ANY FEDERALLY LISTED OR
PROPOSED FOR LISTING ENDANGERED OR THREATENED SPECIES OR CRITICAL HABITAT
IN THE PERMIT AREA THAT MAY BE AFFECTED BY THE PROPOSED. PROJECT. DATE
CONTACTED: Not required (ATTACH RESPONSES
FROM THESE AGENCIES.)
16. YOU ARE-REQUIRED TO CONTACT THE STATE HI STORIC_PRESERVAT ION_ 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:. Not required
17. DOES THE PROJECT INVOLVE AN EXPENDITURE OF PUBLIC FUNDS OR THE USE OF
PUBLIC (STATE) LAND?
YES N 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 [ J NO pQ
b. IF YES, HAS THE DOCUMENT BEEN REVIEWED THROUGH THE NORTH CAROLINA
DEPARTMENT OF ADMINISTRATION STATE CLEARINGHOUSE?
YES [ ] NO [}d
IF ANSWER TO 17b IS YES, THEN SUBMIT APPROPRIATE DOCUMENTATION FROM THE
STATE CLEARINGHOUSE TO DIVISION OF ENVIRONMENTAL MANAGEMENT REGARDING
COMPLIANCE WITH THE NORTH CAROLINA ENVIRONMENTAL POLICY ACT.
QUESTIONS REGARDING THE STATE CLEARINGHOUSE REVIEW PROCESS SHOULD BE
DIRECTED TO MS. CHRYS BAGGETT, DIRECTOR STATE CLEARINGHOUSE, NORTH
CAROLINA DEPARTMENT OF ADMINISTRATION, 116 WEST JONES STREET, RALEIGH,
NORTH CAROLINA 27603-8003, TELEPHONE [phone].
4

18. 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? Forest/Farmland
f. IF APPLICABLE, WHAT IS PROPOSED METHOD OF SEWAGE DISPOSAL? Pumping
to the Town of Warrenton
g. SIGNED AND DATED 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,
2) EITHER THE ISSUANCE OR WAIVER OF A 401 DIVISION OF
ENVIRONMENTAL MANAGEMENT (WATER QUALITY) CERTIFICATION, AND
3) (IN THE TWENTY COASTAL COUNTIES ONLY), A LETTER FROM THE
NORTH CAROLINA DIVISION OF COASTAL MANAGEMENT STATING THE PROPOSED
ACTIVITY IS CONSISTENT WITH THE NORTH CAROLINA. COASTAL MANAGEMENT
PROGRAM.
Elk
OWNER'S/AGENT'S SIGNATURE
_4 me
DATE
(AGENT'S SIGNATURE VALID ONLY
IF AUTHORIZATION LETTER FROM
THE OWNER IS PROVIDED (18g.))
5
Rivers
&Associates,
'I1 Inc.
Ms. Jean Manuele
Department of the Army
Corps of Engineers
6512 Falls of the Neuse Road
Suite 105
Raleigh, North Carolina 27615
May 13, 1998
r
Subject: Warren County
Water and Sewer Improvements to Serve
NCDOT I-85 Welcome Center
Rivers File 94567D
Dear Ms. Manuele:
Englneers
Planners
(l '15 Surveyors
?tA
0v _
As I discussed with you on the phone, the subject project was previously permitted, but due to
delays, was not able to be constructed before the permit expired on January 21, 1997 (see copy
attached). Bids for construction were opened on March 26, 1998 and subsequently approved by
NCDOT on May 1, 1998. The project consists of approximately 34,950 ft. of 6" and 8" water
mains and 34,661 ft. of 6" sewer force mains to be installed along SR 1210 in Warren County.
The purpose of this project is to serve the North Carolina Department of Transportation's
Welcome Center on I-85 with water and sewer utilities.
Wetlands and potential wetlands are shown on the attached 8 1/2" x 11" copies from the
project plans. These copies show the areas where the pipeline will leave the shoulder of the
NCDOT roadway and be installed in areas that may be considered wetlands. All ditch and creek
crossings will be repaired and replaced to their originals contours. Also included in this
resubmittal are the following items:
• Executed Pre-Construction Notification Application (original and one (1) copy)
• Location map
• Approval letter for the Sedimentation and Erosion Control Plan dated April 10, 1996
• Erosion control details
• Trenching, backfilling and erosion control specifications
By copy of this letter, I am forwarding seven (7) COPIES OF the application form and one copy
of attachments to the N.C. Division of Environmental Management as required.
107 East Second Street • Post Office Box 929 • Greenville, North Carolina 27835 • [phone] 9 FAX [phone]
Ms. Jean Manuele
May 13, 1998
Page 2
Please review this information at your earliest convenience and call if you have any questions
or require additional information.
Sincerely yours,
ILL
Frederick L. Stowe, P.E.
Associate
encl.
cc: Loria D. Williams
Macon Robertson
File
98()435
RECEIVED MAY 1 4 1996
U.S. ARMY CORPS OF ENGINEERS
WILMINGTON DISTRICT
Action ID. 199602190 County Warren
GENERAL PERMIT (REGIONAL AND NATIONWIDE) VERIFICATION
Property Owner/Agent Warren County Board of Commissioner
Address Attn: Mrs. V. Alfreda Jordan-Webb, County Manager
_ -Post Office Box 619, Warrenton, North Carolina 27539
Telephone No. [phone]
Size and Location of project (waterway, road name/number, town, etc.) Along S
the intersection of S.R. 1210 and U.S. Highway 1/158 to the NCDOT Welcome .R. 1210 from
Center located
on southbound I-85, west to northwest of Norlina, North Caroli na. The site is lo cated adjacent
to, and above t he headwaters of, an unnamed tributa?to Blue Mud Creek.
Description of Activity
Installation of public water supply and sewer collection mains.
SnecificallY, 34,
950 feet of 6-
inch and 8-inch water mains and 34.661 feet of 6-inch sewer fo rce mains.
X_Section 404 (Clean Water Act, 33 USC 1344) only.
Section 10 (River and Harbor Act of 1899) only.
Section 404 and Section 10.
12 Nationwide Permit.
Any violation of the conditions of the Regional General or Nationwide Permit referenced above
may subject the permittee to a stop work order, a restoration order, and/or appropriate legal
action:
This Department of the Army Regional General/Nationwide Permit verification does not relieve
the undersigned permittee of the responsibility to obtain any other required Federal, State, or
local approvals/permits. The permittee may need to contact appropriate State and local agencies
before beginning work.
Regulatory Project Manager S
Date May 13, 1996 ]
SURVEY PLATS, FIELD SKETCH, WETLAND DELINEATION FORM, ETC., MUST BE
ATTACHED TO THE FILE COPY OF THIS FORM, IF REQUIRED OR AVAILABLE.
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State of North Carolina
Department of Environment,
Health and Natural Resources
Raleigh Regional Office
James B. Hunt, Jr., Governor
Jonathan B. Howes, Secretary
ZYvCu 111JP 1 5 1996
I
NR
DIVISION OF LAND RESOURCES
April 10, 1996
Warren County
PO Box 619
Warrenton, NC 27589
ATTN: V. Alfreda Jordan-Webb
RE: Letter of Approval
Project Name: Water & Sewer Improvements to
Serve NCDOT Welcome Ctr.
Location: Warren County
Submitted by: Rivers & Assoc.
Date Received: 4-1-96
Date Processing Initiated: 4-1-96
New Submittal () Revised (X)
Dear Ms. Jordan-Webb:
This office has reviewed the subject Erosion and Sedimentation Control Plan.
We find the plan to be acceptable and hereby issue this letter of approval. If any
modifications, performance reservations, or recommendations are applicable, a list is
enclosed and is incorporated as a part of this letter of approval. If any modifications
are not incorporated into the plan and implemented in the field, the site will be in
violation of the Sedimentation Pollution Control Act of 1973 (North Carolina General
Statute, hereinafter NCGS, 113A-61.1).
The land-disturbing activity described in the plan for this site may be subject to
the approval of other Local, State or Federal agencies. This could include the
Division of Environmental Management under stormwater or other water quality
regulations, the U.S. Army Corps of Engineers under Article 404 jurisdiction, county,
city or town agencies under other local ordinances, or other approvals that may be
required. The approval issued in this letter cannot supersede any other required
permit or approval.
Please be advised that Title 15A, North Carolina Administrative Code, 4B
.0018(a) requires that a copy of the approved plan be on file at the job site. Also,
3800 Barrett Drive, Suite 101, AW FAX [phone]
Raleigh, North Carolina 27609 N%1 C An Equal Opportunity Affirmative Action Employer
Voice 919-571-4700 50% recycled/ 10% post-consumer paper
Ms. Jordan-Webb
April 10, 1996
page 2
please consider this letter as notice in accordance with the requirements of NCGS
113A-61.1 concerning our right to perform periodic inspections to ensure compliance
with the approved plan.
North Carolina's sedimentation pollution control program is performance
oriented, requiring protection of the natural resources and adjoining properties. If at
any time during this project it is determined that the Erosion and Sedimentation
Control Plan is inadequate to meet the requirements of the Sedimentation Pollution
Control Act of 1973 (NCGS 113A-51 through 66), this office may require revisions in
the plan and its implementation to ensure compliance with the Act.
Please note that this approval is based in part on the accuracy of the
information provided concerning financial responsibility. You are requested to file an
amended Financial Responsibility Form if any changes become necessary. In
addition, it would be helpful if you would notify this office of the proposed starting
date for the activity at the subject site.
Your cooperation is appreciated and we look forward to working with you on
this project. If there are any questions, please do not hesitate to contact this office at
9191571-4700.
Sincerely,
/V
Wyatt Brown, CPESC
Assistant Regional Engineer
Land Quality Section
Raleigh Regional Office
WB/gb
cc: Frederick L. Stowe, P.E.
C
i '•
FINANCIAL RESPONSIBILITY/OWNERSHIP FORM
SEDIMENTATION POLLUTION CONTROL ACT
No person may initiate any Land-disturbing actlvNy on one or more contiguous acres as covered by the Act
before this form and an acceptable erosion and sedimentation control plan have been compleled and approved
by the Land Quality Section, N.C. Department of Environment, Health, and Natural Resources. (Please type or
print and, If question Is not applicable, place N/A In the blank.)
Part A.
1. Project Name Water and Sewer Improvements to serve NCDOT I-85 Welcome Center
2. Location of land-disturbing activity: County Warren City
or Township Smith Creek Township andHighway/ Street- S.R. 1210
3. Approximate date land-disturbing activity will be commenced: March 1, 1996
4. Purpose of development (residential, commercial, Industrial, etc.) : Municipal
5. Approximate acreage of land to be disturbed or uncovered : 12.2 AC
6. Has an erosion and sedimentation control plan been filed ?Yes X No
7. Person to contact should sediment control Issues arise during Land-disturbing activity.
Name Ms. V. Alfreda Jordan-Webb, Co. Mgr. Telephone [phone]
8. Landowner (s) of Record ( Use blank page to list additional owners.):
Warren County
Name (s)
PO Box 619
Current Mailing Address
t
Current Street Address
Warrenton NC 27589
City State Zip City State ZIP
9. Recorded In Deed Book No. N/A Page No.
Part B.
1. Person (s) or firms (s) who are financially responsible for this land-disturbing activity (Use the blank page to list
additional persons or firms):
Warren County
Name of Person (s)or Firm (s)
PO Box 619
Mailing Address
Warrenton NC 27589
City State Zip
Street Address
City
State Zip
Telephone [phone] Telephone
2. (a) 11 the Financially Responsible Party Is not a resident of North Carolina give name and street address of
a North Carolina Agent.
N/A
Name
Mailing Address Street Address
Cfty State Zip City
Telephone Telephone
State Zip
(b) If the Financially Responsible Party Is a Partnership give the name and street address of each General
Partner ( Use blank page to list additional partners). If the FlnanclOy Responsible Party Is a Corporation
give name and street address of the Registered Agent.
Name
Mailing Address Street Address
City State Zip City State Zip
Telephone Telephone
The above information is true and correct to the best of rry knowledge and belief and was provided by me
under oath. ( This form must be signed by the financially responsible person K an individual or his attomey-in-
fact or H not an individual by an officer, drector, partner, or registered agent with authority to execute kistru-
ments for the finanacially responsible person ). I agree to provide corrected information should there be any
change in the information provided herein.
t?
V. Alfreda Jordan-Webb
Type or print name
County Manager
Title or Authority
Date
I, , a Notary Public of the County of
State of North Carolina, hereby certify that
appeared personally before me this day and being duly sworn acknowledged that the above torn was exe-
cuted by him.
Witness my hand and notarial seal, this day of
19
Seal Notary
My commission expires
VARIABLE AS DIRECTED BY ENGINEER
(10' MAX.)
J & I
1 GA GE, 4"x 4" L D RE FAB RIC
t
f

7 7
STEEL POST N
WIRE FABRIC
UV RESISTANT
GE07EXTILE FABRIC
TAMPED BACKFILL
•ff

GROUND LINE
BURY FABRIC 6" MIN.
2'\ TEMP ORAR Y SIL T FENCE DETAIL
18 NOT TO SCALE DWG. No. W-
BURY UPSTREAM EDGE OF
PLACE STAPLES 1%2 TO
6' APART OR AS REQ D
TO HOLD JUTE FIRML Y
IN PLACE
OVERLAP STRIPS 4" IN
DIRECTION OF FLOW
PLAN
BURY EACH EDGE OF
STRIP 4" OR MORE.
JUTE MATTING STRIPS
s SLOPE S TABILIZA T1 ON VJU TE MA T TINS
18,1 NOT TO SCALE DWG. NO. EC-8T
L
n _

SPILL WAY- W MIN.
NO TES:
A 1. ROCK CHECK DAM SHALL BE CONSTRUCTED
A OF CLASS l RIP-RAP WITV 12" THICK NO. 57
STONE FACE ON UPSTREAM SIDE.
2. H= VARIES ACCORDING TO LOCAL CONDITIONS.
INSTALL AS DIRECTED BY ENGINEER.
NO. 57 STONE
A-A
1o'? TEMPORARY ROC,
18 NOT TO SCALE
B-B
SI L T CHECK
CLASS I RIP-RAP
DWG. NO. EC-3
SPILLWAY SHALL BE 6` MIN. BELOW LEVEL OF LOWEST BANK
r

RIP-RAP TO CONFORM
TO EXISTING SLOPE
CREEK/DITCH BED ?-
?-?-?- F L! TER CLOTH

DITCH CROSS-SECTION
F_
REEK/DI TCH BED
DITCH PLAN VIEW
v?
w
11 RIP-RAP DETAIL
18 NOT TO SCALE DWG. No. EC-7e
Warren County - NCDOT Welcome Center 1/96
SECTION 02220 - TRENCHING BACKFILLING AND COMPACTION
PART I. -GENERAL
RELATED DOCUMENTS:
The general provisions of the Contract, including the General and Special Conditions and
Division-1 Specification sections apply to work of this section.
DESCRIPTION OF WORK:
This section covers excavation and trenching work and shall include the necessary clearing,
grubbing, and preparation of the site; removal and disposal of all debris; excavation and
trenching as required; the handling, storage, transportation, and disposal of all excavated
material; all necessary sheeting, shoring, and protection work; preparation of subgrades;
pumping and dewatering as necessary or required; protection of adjacent property; backfilling;
pipe embedment; and other appurtenant work.
RELATED WORK SPECIFIED ELSEWHERE:
Packaged Pump Station: Division-11
Pipe and Pipe Fittings: Division-15
QUALITY ASSURANCE:
Codes and Standards: Perform excavation work in compliance with applicable requirements of
governing authorities having jurisdiction and the Occupational Safety and Health Administration.
Testing and Inspection Service:
Employ testing laboratory to perform soil testing and Inspection service for quality control
testing during earthwork operations. The cost of testing and inspection shall be paid for out of
the testing allowance as specified in Division-1.
1167 TRENCHING, BACKFILLING AND COMPACTION 02220-1
Warren County - NCDOT Welcome Center
SUBMITTALS:
1/96
Test Reports-Excavating: Submit following reports directly to ENGINEER from the testing
services, with copy to CONTRACTOR:
Test reports on soil and embedment.
Field density test reports.
One optimum moisture-maximum density curve for each type of soil encountered.
JOB CONDITIONS:
Classification of Excavated Materials:
Earth Excavation and trenching work shall include the removal and subsequent handling of all
materials excavated or otherwise removed in performance of the contract work, regardless of
the type, character, composition, or condition thereof except that classified as rock below.
Rock Excavation is defined as being sandstone, limestone, flint, granite, quartzite, slate, hard
shale, or similar material in masses more than 1/2 cubic yard in volume or in ledges 4 inches
or more in thickness.
Should rock be encountered in two or more ledges, each ledge being not less than 3 inches thick
and with interlying strata of earth, clay, or gravel not more than 12 inches thick in each stratum,
the entire volume between the top of the top ledge and the bottom of the bottom ledge will be
classified as rock.
Site Information: Test borings and other exploratory operations may be made by
CONTRACTOR at no cost to OWNER.
Existing Utilities: Locate existing underground utilities in areas of work. If utilities are to
remain in place, provide adequate means of support and protection during earthwork operations.
Should uncharted, or incorrectly charted, piping or other utilities be encountered during
excavation, consult utility OWNER immediately for directions. Cooperate with OWNER and
utility companies in keeping respective services and facilities in operation. Repair damaged
utilities to satisfaction of utility OWNER.
1167 TRENCHING, BACKFILLING AND COMPACTION 02220-2
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Do not interrupt existing utilities serving facilities occupied and used by OWNER or others,
during occupied hours, except when permitted in writing by ENGINEER and then only after
acceptable temporary utility services have been provided.
Provide minimum of 48-hour notice to ENGINEER, and receive written notice to proceed before
interrupting any utility.
Demolish and completely remove from site existing underground utilities indicated to be
removed. Coordinate with utility OWNER for shut-off of services if lines are active.
Use of Explosives:
Do not bring explosives into site or use in work without prior written permission from
authorities having jurisdiction. CONTRACTOR is solely responsible for handling, storage, and
use of explosive materials when their use is permitted.
Protection of Persons and Property: Barricade open excavations occurring as part of this work
and post with warning lights.
Operate warning lights as recommended by authorities having jurisdiction.
Protect structures, utilities, sidewalks, pavements, and other facilities from damage caused by
settlement, lateral movement, undermining, washout and other hazards created by earthwork
operations.
PART 2 - PRODUCTS
DEFINITIONS:
Satisfactory soil materials are defined as those complying with ASTM D 2487 soil classification
groups GW, GP, GM, GC, SM, SW and SP.
Unsatisfactory soil materials are defined as those complying with ASTM D 2487 soil
classification groups ML, MH, CL, CH, SC, OL, OH and PT.
GENERAL MATERIALS:
Clean Sand: Washed or natural sand with less than 10 percent by weight passing the No. 200
sieve.
1167 TRENCHING, BACKFILLING AND COMPACTION 02220-3
Warren County - NCDOT Welcome Center 1/96
Engineerin Fabric: abric: For use in soil stabilization use, provide synthetic fabric as specified in
NCDOT Standard Specifications for Road and Structure Section 1056 Type 2.
Granular Fill (Granular Embedment and Stabilization Material): Granular fill or embedment
material shall be crushed rock or gravel, shall be free from dust, clay, or trash, and shall be #67
or #57 stone as defined in ASTM C 33 except that larger stone may be used for stabilization if
approved by the ENGINEER.
Aggregate Base Course Material: Naturally or artificially graded mixture of natural or crushed
gravel, crushed stone, crushed slag, natural or crushed sand as specified in NC DOT Standard
Specifications for Roads and Structures Section 910 Type A.
Fill Material (Backfill): All material deposited in trenches shall be satisfactory soils free from
rocks or stones larger than 2 inches, brush, stumps, logs, roots, debris, and organic or other
objectionable materials, and shall be wetted or dried as required and thoroughly mixed to ensure
uniform moisture content.
Select Backfill: Job excavation or borrow material consisting of coarse sands and fine sands
with not more than 15 % by weight passing the no. 200 sieve. This does not include clays, silts,
organic soils or any materials not acceptable as fill material. Select backfill must receive prior
approval from the ENGINEER before use.
PIPE EMBEDMENT:
Embedment materials both below and above the bottom of the pipe, classes of embedment to be
used, and placement and compaction of embedment materials shall conform to the requirements
shown on the drawings and to the following supplementary requirements.
Embedment materials shall contain no cinders or other material which may cause pipe corrosion.
Class A Arch Encasement is not required unless improper trenching or unexpected trench
conditions require its use as determined by the ENGINEER.
Class A bedding shall include granular embedment from 4" below the pipe to the springline,
reinforced concrete encasement a minimum of 4" over the pipe and handplaced embedment at
least 6" above the pipe.
Class C Bedding shall be used for all reinforced and nonreinforced concrete pipelines.
Class C bedding shall include granular fill from 4" below the pipe to 1/6 of the outside diameter
of the pipe and backfill embedment to at least 12" above the top of the pipe.
1167 TRENCHING, BACKFILLING AND COMPACTION 02220-4
Warren County - NCDOT Welcome Center
Class E Bedding shall be used for all PVC pressure pipe.
1/96
Class E embedment shall include select backfill embedment from 4" below the pipe to at least
12" above the pipe.
Class F Bedding shall be used for all ductile iron pipe.
Class F embedment shall include backfill material from the bottom of the pipe (and bell holes)
to at least 12" above the pipe.
Corrugated Metal Pipe Bedding shall be class C unless otherwise shown on drawings.
PART 3 - EXECUTION
GENERAL REOUIREMENTS:
Excavation shall provide adequate working space and clearances for the work to be performed
therein and for installation and removal of concrete forms. In no case shall excavation faces be
undercut for extended footings.
Subgrade surfaces shall be clean and free of loose material of any kind when concrete is placed
thereon.
Backfilling and construction of fills and embankments during freezing weather shall not be done
except by permission of the ENGINEER. No backfill, fill, or embankment materials shall be
installed on frozen surfaces, nor shall frozen materials, snow or ice be placed in any backfill,
fill or embankment.
SITE PREPARATION. CLEARING AND GRUBBING:
All sites to be occupied by permanent construction or embankments shall be cleared of all logs,
trees, roots, brush, tree trimmings and other objectionable materials and debris. All stumps
shall be grubbed. Subgrades for fills and embankments shall be cleaned and stripped of all
surface vegetation, sod, and organic topsoil. All waste materials shall be removed from the site
and disposed of by and at the expense of the CONTRACTOR.
Clear and grub the entire width of the permanent right of way. All other clearing shall be
performed as necessary for access, stringing of pipeline materials, and construction of the
pipeline and appurtenant structures.
1167 TRENCHING, BACKFILLING AND COMPACTION 02220-5
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BLASTING:
1/96
The CONTRACTOR shall be responsible for all damage caused by blasting operations. Suitable
methods shall be employed to confine all materials lifted by blasting within the limits of the
excavation or trench.
All rock which cannot be handled and compacted as earth shall be kept separate from other
excavated materials and shall not be mixed with backfill or embankment materials except as
specified or directed.
PRESERVATION OF TREES:
No trees shall be removed outside of excavated or filled areas, unless their removal is authorized
by the OWNER. Trees left standing shall be adequately protected from permanent damage by
construction operations.
UNAUTHORIZED EXCAVATION:
Except where otherwise authorized, shown or specified, all materials excavated below the bottom
of concrete walls, footings, slabs on grade and foundations shall be replaced by, and at the
expense of, the CONTRACTOR, with concrete placed at the same time and monolithic with the
concrete above.
DEWATERING:
Dewatering equipment shall be provided to remove and dispose of all surface and ground water
entering excavations, trenches, or other parts of the work. Each excavation shall be kept dry
during subgrade preparation and continually thereafter until the structure to be built, or the pipe
to be installed therein, is completed to the extent that no damage from hydrostatic pressure,
flotation, or other cause will result.
All excavations for concrete structures or trenches which extend down to or below ground water
shall be dewatered by lowering and keeping the ground water level beneath such excavations 12
inches or more below the bottom of the excavation.
Surface water shall be diverted or otherwise prevented from entering excavated areas or trenches
to the greatest extent practicable without causing damage to adjacent property.
1167 TRENCHING, BACKFILLING AND COMPACTION 02220-6
Warren County - NCDOT Welcome Center 1/96
The CONTRACTOR shall be responsible for the condition of any pipe or conduit which he may
use for drainage purposes, and all such pipe or conduit shall be left clean and free of sediment.
SHEETING AND SHORING:
Except where banks are cut back on a stable slope, excavation for structures and trenches shall
be sheeted, braced, and shored as necessary to prevent caving or sliding.
Trench sheeting shall not be pulled before backfilling unless the pipe strength is sufficient to
carry trench loads based on trench width to the back of sheeting, nor shall sheeting be pulled
after backfilling. Where trench sheeting is left in place, such sheeting shall not be braced
against the pipe, but shall be supported in a manner which will preclude concentrated loads or
horizontal thrusts on the pipe. Cross braces installed above the pipe to support sheeting may
be removed after pipe embedment has been completed.
Steel sheet piling shall be furnished, installed, and left in place at locations as required to limit
the extent of excavations for the deeper structures and necessary backfill under adjacent
shallower structures, and to protect adjacent structures and facilities from damage due to
excavation and subsequent construction. No additional payment above the contract amount will
be made for such sheet piling as required.
STABILIZATION:
Subgrades for concrete structures and trench bottoms shall be firm, dense, and thoroughly
compacted and consolidated; shall be free from mud and muck; and shall be sufficiently stable
to remain firm and intact under the feet of the workmen.
Subgrades for concrete structures or trench bottoms which are otherwise solid, but which
become mucky on top due to construction operations, shall be reinforced with crushed rock or
gravel. The stabilizing material shall be as specified for granular fills. Not more than 1/2 inch
depth of mud or muck shall be allowed to remain on stabilized trench bottoms when the pipe
bedding material is placed thereon. The finished elevation of stabilizing subgrades shall not be
above subgrade elevations indicated on the drawings.
EXCAVATION FOR STRUCTURES:
Conform to elevations and dimensions shown within a tolerance of plus or minus 0.10', and
extending a sufficient distance from footings and foundations to permit placing and removal of
concrete formwork, installation of services, other construction, and for inspection.
1167 TRENCHING, BACKFILLING AND COMPACTION 02220-7
Warren County - NCDOT Welcome Center 1/96
In excavation for footings and foundations, take care not to disturb bottom of excavation. Trim
bottoms to required lines and grades to leave solid base to receive other work.
Except where exterior surfaces are specified to be dampproofed, monolithic concrete manholes
and other concrete structures, or parts thereof, which do not have footings that extend beyond
the outside face of exterior walls, may be placed directly against excavation faces without the
use of outer forms, provided that such faces are stable.
Excavations for manholes and similar structures constructed of masonry units shall have such
horizontal dimensions that not less than 6 inches clearance is provided for outside plastering.
ROADWAY EXCAVATION:
Excavation for the roadways, drives, and parking areas shall conform to the lines, grades, cross
sections, and dimensions indicated on the drawings and shall include the excavation of all
unsuitable material from the subgrade. After shaping to line, grade, and cross section, the
subgrade shall be compacted to a depth of at least 6 inches to 95 percent of maximum density
at optimum moisture content as determined by ASTM D 698. This operation shall include any
reshaping and wetting or drying required to obtain proper compaction. All soft or otherwise
unsuitable material shall be removed and replaced with suitable material.
Engineering Fabric: Install in areas indicated in accordance with manufacturers' instructions and
NCDOT specification Section 1056.
TRENCH EXCAVATION:
General: No more trench shall be opened in advance of pipe laying than is necessary to expedite
the work. One block or 400 feet (whichever is the shorter) shall be the maximum length of open
trench on any line under construction.
Except where tunneling or boring is indicated on the drawings, is specified, or is permitted by
the ENGINEER, all trench excavation shall be open cut from the surface.
Alignment, Grade, and Minimum Cover: Vertical and horizontal alignment of pipes, and the
maximum joint deflection used in connection therewith, shall be in conformity with requirements
of the section covering installation of pipe.
Where pipe grades or elevations are not definitely fixed on the contract drawings or shown in
profile, trenches shall be excavated with an absolute minimum depth of backfill cover over the
top of the pipe of 36 inches unless otherwise indicated. Greater than minimum pipe cover
1167 TRENCHING, BACKFILLING AND COMPACTION 02220-8
Warren County - NCDOT Welcome Center 1/96
depths may be necessary on vertical curves or to provide necessary clearance beneath existing
pipes, conduits, drains, drainage structures, or other obstructions encountered at normal pipe
grades. Measurement of pipe cover depth shall be made vertically from the outside top of pipe
to finished ground or pavement surface elevation except where future surface elevations are
indicated on the drawings.
Limiting Trench Widths: Trenches shall be excavated to a width which will provide adequate
working space and sidewall clearances for proper pipe installations, jointing, and embedment.
However, the limiting trench widths from the bottom of the trench to an elevation one foot
above the top of installed pipe, and the minimum permissible sidewall clearances between the
installed pipe and each trench wall shall be as follows:
Nominal Minimum Maximum
Pipe Size Trench Width Trench Width
(inches) (inches) (inches)
Less than 18 Pipe O.D. Plus 18 Pipe O.D. Plus 24
18 through 27 Pipe O.D. Plus 24 Pipe O.D. Plus 30
28 through 42 Pipe O.D. Plus 24 Pipe O.D. Plus 36
43 through 60 Pipe O.D. Plus 30 Pipe O.D. Plus 36
Stipulated minimum sidewall clearances are not minimum average clearances but are minimum
clear distances which will be required.
Cutting trench banks on slopes to reduce earth load to prevent sliding and caving shall be used
in areas where the increased trench width will not interfere with surface features or encroach on
right-of-way limits. Slopes shall not extend lower than one foot above the top of the pipe.
Unauthorized Trench Widths: Where, for any reason, the width of the lower portion of the
trench, as excavated at any point, exceeds the maximum permitted in the foregoing tables, either
pipe of adequate strength, special pipe embedment, or arch concrete encasement, as required by
loading conditions and with the concurrence of the ENGINEER, shall be furnished and installed
by and at the expense of the CONTRACTOR.
Mechanical Excavation: The use of mechanical equipment will not be permitted in locations
where its operation would cause damage to trees, buildings, culverts, or other existing property,
utilities, or structures above or below ground. In all such locations, hand excavating methods
shall be used.
Only rubber-tired equipment will be permitted on paved streets unless specifically allowed by
the owner and engineer on a case-by-case basis.
1167 TRENCHING, BACKFILLING AND COMPACTION 02220-9
Warren County - NCDOT Welcome Center 1/96
Mechanical equipment used for trench excavation shall be of a type, design, and construction,
and shall be so operated that the rough trench excavation bottom elevation can be controlled, that
uniform trench widths and vertical sidewalls are obtained at least from an elevation one foot
above the top of the installed pipe to the bottom of the trench, and that trench alignment is such
that pipe when accurately laid to specified alignment will be centered in the trench with adequate
clearance between the pipe and sidewalls of the trench. Undercutting the trench sidewall to
obtain clearance will not be permitted.
Where soil conditions permit, trenches for pipe 10 inches or less in diameter may be excavated
by trenching equipment comparable to a Cleveland JS 36. Trenchers shall be capable of being
leveled on sloping ground. Trench depths for proper pipe grade according to profiles,
elevations, dimensions, etc., on plans must be complied with even if a trencher is utilized.
Cuttiniz Concrete and Asphalt Surface Construction: Cuts in concrete and asphalt pavements
shall be no larger than necessary to provide adequate working space for proper installation of
pipe and appurtenances. Cutting shall be started with a concrete saw in a manner which will
provide a clean groove at least 2 inches deep along each side of the trench and along the
perimeter of cuts for structures.
Concrete and asphalt pavement over trenches excavated for pipelines shall be removed so that
the width at any point is not greater than the top edge of the trench. Trench width at the bottom
shall not be greater than at the top and no undercutting will be permitted. Pavement cuts shall
be made to and between straight or accurately marked curved lines which, unless otherwise
required, shall be parallel to the centerline of the trench.
Pavement removed for connections to existing lines or structures shall not be of greater extent
than necessary for the installation.
Where the trench parallels the length of concrete walks and the trench location is all or partially
under the walk, the entire walk shall be removed and replaced. Where the trench crosses drives,
walks, curbs, or other surface construction, the surface
construction shall be removed and replaced between existing joints or between saw cuts as
specified for pavement.
Excavation Below Pipe Subgrade: Where required, pipe trenches shall be excavated below the
underside of the pipe, to provide for the installation of granular embedment.
Artificial Foundations in Trenches (Stabilization Material): Whenever unsuitable or unstable soil
conditions which cannot be corrected by dewatering are encountered, trenches shall be excavated
below grade and the trench bottom shall be brought to grade with additional embedment material
for stabilization.
1167 TRENCHING, BACKFILLING AND COMPACTION 02220-10
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Bell Holes: Bell holes shall provide adequate clearance for tools and methods used in installing
pipe. No part of any bell or coupling shall be in contact with the trench bottom, trench walls,
or granular embedment when the pipe is jointed.
Where trenching equipment is approved, and a 4-inch minimum bed of pulverized soil is
returned to the trench bottom prior to installation of the pipe, the excavation of bell holes will
not be required.
PIPE EMBEDMENT:
Placement and Compaction: Granular embedment material shall be spread and the surface
graded to provide a uniform and continuous support beneath the pipe at all points between bell
holes or pipe joints. It will be permissible to slightly disturb the finished subgrade surface by
withdrawal of pipe slings or other lifting tackle.
After each pipe has been graded, aligned, and placed in final position on the bedding material
or trench bottom and shoved home, sufficient pipe embedment material shall be deposited and
compacted under and around each side of the pipe and back of the bell or end thereof to hold
the pipe in proper position and alignment during subsequent pipe jointing and embedment
operations.
Embedment material shall be deposited and compacted uniformly and simultaneously on each
side of the pipe to prevent lateral displacement.
Hand placed embedment shall be compacted to the top of the pipe in all areas where compacted
backfill is specified.
Whenever crushed rock is used as embedment for 36 inch and larger pipe, the portion above the
bottom of the pipe shall be vibrated with a mechanical probe type vibrator during placement to
ensure that all spaces beneath the pipe are filled.
TRENCH BACKFILL:
A layer of backfill material not more than 8 inches deep may be placed over concrete arch
encasement or concrete reaction blocking after the concrete has reached its initial set, to aid
curing. No additional backfill shall be placed over arch encasement or blocking until the
concrete has been in place for at least 3 days.
1167 TRENCHING, BACKFILLING AND COMPACTION 02220-11
Warren County - NCDOT Welcome Center
1/96
Backfill compacted to 95 percent of maximum density at optimum moisture content as
determined by ASTM D698 will be required for the full depth of the trench above the
embedment in the following locations:
Where beneath pavements, surfacings, driveways, curbs, gutters, walks or other surface
construction or structures.
Where in street, road, or highway shoulders.
Where beneath fills or embankments.
In established lawn areas.
In other areas the backfill shall be compacted to 90 percent or equal to existing.
Where the trench for one pipe passes beneath the trench for another pipe, backfill for the lower
trench shall be compacted to the level of the bottom of the upper trench.
The ENGINEER may require select backfill in upper portion or all portions of trenches in
roadways. Refer to payment section.
Job excavation material may be used for compacted backfill when the job excavated material is
finely divided and free from debris, organic material, cinders or other corrosive material, and
stones larger than 3 inches in greatest dimension. Masses of moist, stiff clay shall not be used.
Each layer of material shall have the best practicable moisture content for satisfactory
compaction. The material in each layer shall be wetted or dried as required and thoroughly
mixed to ensure uniform moisture content and adequate compaction. Backfill materials shall
be placed in uniform layers not exceeding 8 inches in uncompacted thickness. Increased layer
thickness may be permitted for noncohesive material if the CONTRACTOR demonstrates to the
satisfaction of the ENGINEER that the specified compacted density will be obtained.
The method of compaction and the equipment used shall be appropriate for the material to be
compacted and shall not transmit damaging shocks to the pipe.
The top portion of backfill beneath established lawn areas shall be finished with not less than
4 inches of topsoil corresponding to, or better than, that underlying adjoining lawn areas.
STRUCTURE BACKFILL:
The quality and moisture content of materials for backfill around and outside of structures shall
conform to the requirements for fill materials. Backfill materials shall be deposited in layers not
1167 TRENCHING, BACKFILLING AND COMPACTION 02220-12
Warren County - NCDOT Welcome Center 1/96
to exceed 8 inches in uncompacted thickness and compacted to at least 95 percent of maximum
density at optimum moisture content as determined by ASTM D 698. Compaction of structure
backfill by rolling will be permitted provided the desired compaction is obtained and damage to
the structure is prevented. Compaction of structure backfill by inundation with water will not
be permitted.
No backfill shall be deposited or compacted in water. Particular care shall be taken to compact
structure backfill which will be beneath pipes, drives, roads, parking areas, walks, curbs,
gutters, or other surface construction or structures. In addition, wherever a trench is to pass
through structure backfill, the structure backfill shall be placed and compacted to an elevation
not less than 12 inches above the top of pipe elevation before the trench is excavated.
Compacted areas, in each case, shall be adequate to support the item to be constructed or placed
thereon.
As indicated in Division-3 no water bearing structure shall be backfilled until the structure has
been tested for leakage.
DRAINAGE MAINTENANCE:
Trenches across roadways, driveways, walks, or other trafficways adjacent to drainage ditches
or water courses shall not be backfilled prior to completion of backfilling the trench on the
upstream side of the trafficway, to prevent impounding water after the pipe has been laid.
Bridges and other temporary structures required to maintain traffic across such unfilled trenches
shall be constructed and maintained by the CONTRACTOR. Backfilling shall be done so that
water will not accumulate in unfilled or partially filled trenches. All material deposited in
roadway ditches or other water courses by the line of trench shall be removed immediately after
backfilling is completed and the original section, grades, and contours of ditches or water
courses shall be restored. Surface drainage shall not be obstructed longer than necessary.
PROTECTION OF TRENCH BACKFILL IN DRAINAGE COURSES:
Where trenches are constructed in ditches or other water courses, backfill shall be protected
from surface erosion. Where the grade of the ditch exceeds one percent, ditch checks shall be
installed.
DISPOSAL OF EXCESS EXCAVATED MATERIALS:
Except as otherwise permitted, all excess excavated materials shall be disposed of away from
the site of the work by the CONTRACTOR.
1167 TRENCHING, BACKFILLING AND COMPACTION 02220-13
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Broken concrete and other debris resulting from pavement or sidewalk removal, excavated rock,
debris encountered in excavation work, and other similar waste materials shall be properly
disposed of away from the site of the work.
Excess earth from excavations located in unimproved property may be distributed directly over
the pipe trench and within the pipeline right-of-way to a maximum depth of 6 inches above the
original ground surface elevation at and across the trench and sloping uniformly each way.
Material thus wasted shall be carefully finished with a drag, blade machine, or other suitable tool
to a smooth, uniform surface without obstructing drainage at any point. Wasting of excess
excavated material in the above manner will not be permitted where the line of trench crosses
or is within proposed or existing railroad, public road, or highway right-of-way. The disposal
of waste and excess excavated materials, including hauling, handling, grading, and surfacing
shall be a subsidiary obligation of the CONTRACTOR and no separate payment will be made
therefore.
SETTLEMENT:
The CONTRACTOR shall be responsible for all settlement of backfill, fills, and embankments
which may occur within the correction period stipulated in the General Conditions.
The CONTRACTOR shall make, or cause to be made, all repairs or replacements made
necessary by settlement within 30 days after notice from the ENGINEER or OWNER.
TESTS:
As stipulated in the quality control section, all tests required for preliminary review of materials
shall be made by an acceptable independent testing laboratory at the expense of the
CONTRACTOR. Two initial gradation tests shall be made for each type of embedment, fill or
backfill material and one additional gradation test shall be made for each additional 500 tons of
each material.
Moisture-density (Proctor) tests and relative density tests on the materials, and all in-place field
density tests, shall be paid for out of the testing allowance.
END OF SECTION 02220
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SECTION 02910 - EROSION AND POLLUTION CONTROL
PART 1 -GENERAL
RELATED DOCUMENTS:
The general provisions of the Contract, including the General and Special Conditions and
Division-1 Specification sections apply to work of this section.
DESCRIPTION OF WORK:
The extent of the work required under this section is that required to minimize water, air, and
noise pollution and soil erosion and siltation.
Temporary erosion control measures which may be necessary include, but are not limited to,
temporary berms, dikes, dams, drainage ditches, silt basins, silt ditches, perimeter swales, slope
drains, structures, vegetation, mulches, mats, netting, gravel or any other methods or devices
that are necessary to control or restrict erosion. Temporary erosion control measures may
include work outside the right-of-way or construction limits where such work is necessary as a
result of construction such as borrow pit operations, haul roads, plant sites, equipment storage
sites and disposal of waste or debris. The CONTRACTOR shall be liable for all damages to
public or private property caused by silting or slides originating in waste areas furnished by the
CONTRACTOR.
RELATED WORK SPECIFIED ELSEWHERE:
Trenching, Backfilling and Compaction: Section 02220
Roadways, Drives, Sidewalks, Curb and Gutter Patching: Section 02510
Fertilizing, Seeding and Mulching: Section 02920
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QUALITY ASSURANCE:
Codes and Standards:
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North Carolina Sedimentation Pollution Control Act of 1973 and the Rules and Regulations
promulgated pursuant to the provisions of said act.
"Standard Specifications for Roads and Structures", North Carolina Department of
Transportation (DOT).
In the event of conflict between the regulations listed above and the requirements of these
specifications, the more restrictive requirement shall apply.
SANCTIONS:
Failure of the CONTRACTOR to fulfill any of the requirements of this section may result in the
OWNER ordering the stopping of construction operations in accordance with the General
Conditions until such failure has been corrected. Such suspension of operations will not justify
an extension of Contract time nor additional compensation.
Failure on the part of the CONTRACTOR to perform the necessary measures to control erosion,
siltations, and pollution will result in the ENGINEER notifying the CONTRACTOR to take such
measures. In the event that the CONTRACTOR fails to perform such measures within 24 hours
after receipt of such notice, the OWNER may suspend the work as provided above, or may
proceed to have such measures performed with other forces and equipment, or both. The cost
of such work performed by other forces will be deducted from monies due the CONTRACTOR
on his contract.
PART 2 - PRODUCTS
SILT FENCES:
Posts: Wooden posts shall be a minimum of 4" in diameter and 6' in length. Posts shall be of
creosote or pentachlorophenol treated southern pine.
Steel posts shall be 5' in height and be of the self-fastener angle steel type.
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Posts shall be spaced at 10' max. when silt fence is backed with wire mesh, and 7' when no
wire mesh is used or as required by the ENGINEER.
Woven Wire: Woven wire fencing shall conform to ASTM A116 for Class 3 galvanizing.
Fabric shall be a minimum of 32" in width and shall have a minimum of 6 line wires with 12"
stay spacing. The top and bottom wires shall be 10 gauge while the intermediate wires shall be
12-1/2 gauge. Wire fabric shall be fastened to wood posts with not less than #9 wire staples
1-1/2" long.
Fabric: Provide woven synthetic fiber designed specifically for silt fence conforming to NCDOT
specifications.
DRAINAGE STONE:
Class I material NCDOT No. 57 or No. 5 as required.
RIP RAP:
Class I and Class II in accordance with NCDOT specifications.
Class B Erosion Control Stone may be used in lieu of Class I Rip Rap.
FILTER CLOTH:
For use under rip rap provide spun synthetic fiber; 10 oz/sy; burst strength of 500 psi, vertical
water flow, 265 gpm/sy; Trivera 1135, MIRAFI 140 or approved equal.
MATTING FOR EROSION CONTROL:
Matting for erosion control shall be jute matting or excelsior matting in accordance with
NCDOT SPECIFICATIONS SECTION 960-7, MATTING FOR EROSION CONTROL. Other
acceptable material manufactured especially for erosion control may be used when approved by
the ENGINEER in writing before being used.
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TEMPORARY SEEDING:
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Temporary seeding, when required, shall be performed in accordance with the recommendations
contained in "Guide for Sediment Control on Construction Sites in North Carolina", published
by the Soil Conservation Service and Section 02920 of these specifications.
PART 3 - EXECUTION
GENERAL:
The CONTRACTOR shall take whatever measures are necessary to minimize soil erosion and
siltation, and water, air, and noise pollution caused by his operations. The CONTRACTOR
shall also comply with the applicable regulations of all legally constituted authorities relating to
pollution prevention and control. The CONTRACTOR shall keep himself fully informed of all
such regulations which in any way affect the conduct of the Work, and shall at all times observe
and comply with all such regulations. In the event of conflict between such regulations and the
requirements of the specifications, the more restrictive requirements shall apply.
EROSION AND SILTATION CONTROL:
The CONTRACTOR shall exercise every reasonable precaution throughout the life of the project
to prevent the eroding of soil and the silting of rivers, streams, lakes, reservoirs, other water
impoundments, ground surfaces or other property.
Prior to suspension of operations on the project or any portion thereof, the CONTRACTOR shall
take all necessary measures to protect the construction area, including but not limited to borrow
sources, soil type base course sources and waste areas from erosion during the period of
suspension.
Provide diversion ditches and berms as necessary to prevent concentrated flow of water across
disturbed areas.
Stockpile excavated material on the opposite side of the utility trenches from the watercourses
to the extent that is possible.
In the event that stockpiles are placed on the watercourse side of the trench, provide silt fence
or silt berms with stone filter outlets along the entire length of the stockpile that is on the
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watercourse side of the trench. Upon the completion of backfilling, the measures shall be
removed and the site graded to its natural grade or as shown on plans.
Maintain natural buffer zones along all watercourses sufficient to retain all visible siltation within
the first 25 percent of the buffer width.
Provide a settling basin with a gravel filter outlet for all water pumped from trenches or
dewatering equipment. Pumping of that water directly into any stream, pond or watercourse is
prohibited.
Tamp, fertilize, seed and mulch the disturbed areas as soon as practicable after line is installed
and, in all cases, no later than 30 days after completion of the line segment or work at a
particular site.
When construction operations are suspended for more than 30 days, provide temporary seeding
and mulching of all disturbed areas including those areas in which further construction is
necessary.
Erosion control measures installed by the CONTRACTOR shall be acceptably maintained by the
CONTRACTOR.
Silt fences shall be provided where shown on the drawings and/or as necessary to prevent
erosion.
Catch basins shall be protected from silt by placing straw bales or silt fence around the openings
until vegetative cover is established.
Temporary rock check dams shall be constructed where shown on the drawings and/or as
necessary.
Seeding for erosion control shall be performed in accordance with Section 02920. Matting shall
be installed where shown on the drawings or where required for erosion control. Install matting
in accordance with NCDOT SPECIFICATIONS SECTION 885-3, PLACING MATTING.
STREAM OR DITCH CROSSINGS:
Perform in accordance with details shown on plans. Complete crossing in one working day.
Carefully stabilize disturbed slopes by tamping with equipment buckets and mechanical or hand
tamping. Distribute topsoil evenly on slopes and tamp.
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Where matting is required for erosion control, cover the entire length of the channel disturbed
by excavation. Install matting immediately after fertilizing and seeding of the disturbed channel
lining.
Where rip rap is required, carefully place at least one foot thick over filter cloth.
Fertilize, seed, and mulch each crossing's slopes as soon as practicable after completing the
crossing and in no case more than two weeks after disturbance of the slopes.
WATER AND AIR POLLUTION:
The CONTRACTOR shall exercise every reasonable precaution throughout the life of the project
to prevent pollution of rivers, streams, and water impoundments. Pollutants such as chemicals,
fuels, lubricants, bitumens, raw sewage, and other harmful waste shall not be discharged into
or alongside of rivers, streams, or impoundments, or into natural or manmade channels leading
thereto.
The CONTRACTOR shall comply with all State or local air pollution regulations throughout the
life of the project.
DUST CONTROL:
The CONTRACTOR shall control dust throughout the life of the project within the project area
and at all other areas affected by the construction of the project, including, but not specifically
limited to, unpaved secondary roads, haul roads, access roads, disposal sites, borrow and
material sources and production sites. Dust control shall not be considered effective where the
amount of dust creates a potential or actual unsafe condition, public nuisance, or condition
endangering the value, utility or appearance of any property.
NOISE CONTROL:
The CONTRACTOR shall exercise every reasonable precaution throughout the life of the project
to prevent excessive and unnecessary noise. The CONTRACTOR shall choose his methods so
as to minimize the disturbance of area residents.
END OF SECTION 02910
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