20141200 Ver 2_Special Provision Revision Utility Construction 4-14-2016_20160418

Project: R-2603 V�.-1 County: Wilkes
PROJECT SPECIAL PROVISIONS
Utility Construction
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68 Shipwash Drive
P.O. BOx 97
Garner, NC 27529
NCBELS License No. C-0281
Project No. G13142
January 29, 2015
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I. GENERAL CONSTRUCTION REQUIREMENTS:
Specifications:
Rev. 04/11/2016
(Seal)
The proposed utility construction shall meet the applicable requirements of the NC Department
of Transportation's "Standard Specifications for Roads and Structures" dated January 2012,
NCDENR Division of Water Resources, NCDENR Division of Water Quality, the Town of
North Wilkesboro, the Mulberry/Fairplains Water Association, and the Blue Ridge Water
Association, and the following provisions. Should a conflict arise between the referenced
standards, the most stringent requirement shall apply.
The Contractor shall be responsible far field verifying location, size, type and elevation of all
underground utilities, as well as reconnecting any water and/or sanitary sewer services disturbed
during construction, even if they are not shown on the plans. The water line shall be installed as
to provide a minimum of 3 feet of coverage above the top of pipe from finished grade, unless
shown differently on plans. The Contractor shall verify that all new water and sanitary sewer
lines have ten (10') feet horizontal clearance between each other.
The Contractor is herein forewarned as to the possibility of having to vary the depth of the
pipeline installation to achieve minimum clearance of existing or proposed utilities or storm
drainage while maintaining minimum cover specified (whether existing or proposed pipelines,
conduits, cables, mains, storm drainage are shown on the plans or not).
Connecting to existing water mains may alter such lines to the extent that these pipelines with
existing pipe bends, valves and other related appurtenances may also require reaction blocking;
this is also the responsibility of the Contractor.
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Project: R-2603 C-2 County: Wilkes
The Contractor shall submit his proposed method of anchoring to the Engineer for review and
approval of restraining all pipe, pipe bends, valves and other related appurtenances. Anchoring
shall be the responsibility of the Contractor. Connecting to existing water mains may alter such
lines to the extent that these pipelines with existing pipe bends, valves and other related
appurtenances may also require reaction blocking; this also the responsibility of the Contractor.
Revise the 2012 Standard SUecifications as follows:
Page 10-58, Sub-article 1036-1 General
add the following sentence:
All materials in contact with potable water shall be in conformance with Section 1417 of the Safe
Drinking Water Act.
Page 15-1, Sub-article 1500-2 Cooperation with the Utility Owner, paragraph 2:
add the following sentences:
The water line owners are as follows:
1) Town of North Wilkesboro — The contact person is the Public Services Director, Dale
Shumate, [phone], Ext. 302
2) Mulberry/Fairplains Water Association — The contact person is the General Manager,
Josh Reeves, [phone]
3) Blue Ridge Water Association — The contact person is the General Manager, Greg
Reavis, [phone]
4) The gravity sewer owner is the Town of North Wilkesboro. The contact person is the
Public Services Director, Dale Shumate, [phone], Ext. 3d2
The Contractor shall provide access for the Owners' representatives to all phases of construction.
Notify the Owners two weeks before commencement of any work and one week before service
interruption. Interruption of water service on main lines shall be limited to a maximum of four
(4) hours. Individual service connection interruptions shall be scheduled between regular
working hours unless otherwise permitted by the Owners. Water services shall be restored
within the same working day.
The Owners require that the following be included in these Special Provisions:
1) Owner, or his agent, shall witness all pressure and biological testing.
2) The Contractor shall take all biological samples and send to Owner's preferred laboratory
for testing.
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Project: R-2603 �,-� County: Wilkes
3) All existing appurtenances (hydrants, valves, glands, iittings) that are removed as a result
of the water main relocation will remain the property of the Owner.
4) The Contractor shall have parts available on hand and the capability to repair service
mains immediately if service is interrupted due to the damage caused by the Contractor.
5) Water service to all customers shall be maintained during construction of the new water
main.
6) Sewer service to all customers shall be maintained during construction of the new sewer
main. Service disruptions for any reason shall be limited to a maximum of time of four
hours.
7) Driveway access to the public shall be maintained during construction. Disruption to
driveway access shall be limited the hours between 9:00 am to 4:00 p.m.
Page 15-2, Sub-article 1500-9 Placing Pipelines into Service
add the following sentence:
Obtain approval from the NCDENR-Public Water Supply Section prior to placing a new water
line into service. Use backflow prevention assemblies for temporary connections to isolate new
water lines from existing water line.
Page 15-6, Sub-article 1510-3 (B), Testing and Sterilization
change the allowable leakage formula to:
W = LD� = 148, 000
Page 15-6, Sub-article 1510-3 (B), Testing and Sterilization, s�th paragraph:
Replace the paragraph with the following:
Sterilize water lines in accordance with Section 1003 of The Rules Governing Public Water
supply and AWWA C651 Section 4.4.3, the Continuous Feed Method. Provide a chlorine
solution with between 50 parts per million and 100 parts per million in the initial feed. If the
chlorine level drops below 10 parts per million during a 24 hour period, then flush, refill with
fresh chlorine solution, and repeat far 24 hours. Provide certified bacteriological and
contaminant test results from a state-approved or state-certified laboratory. Operate all valves
and controls to assure thorough sterilization.
Page 15-6, Sub-article 1510-3 (B), Testing and Sterilization, seventh paragraph:
delete the words "may be performed concurrently or consecutively."
and replace with "shall be performed consecutively."
Page 15-7, sub-article 1515-2 Materials,
replace paragraph beginning "Double check valves..." with the following:
Double Check valves (DCV) and Reduced Pressure Zone principal (RPZ) backflow prevention
assemblies shall be listed on the University of Southern California Foundation for Cross-
Connection Control and Hydraulic Research list of approved backflow devices.
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Project: R-2603 �- County: Wilkes
Page 15-11, Sub-article 1520-3(A)(2) Testing, line 5,
replace the second paragraph with the following:
Test a1124" and smaller gravity sewer lines for leakage using infiltration, exfiltration, or air test.
Perform visual inspection on gravity sewer lines larger than 24". Perform line and grade testing
and deflection testing on all gravity sewer lines.
Owners' Requirements:
General
All materials and equipment shall be furnished by an established and reputable manufacturer or
supplier. All materials and equipment shall be new and shall be of first class ingredients and
construction designed and guaranteed to perform the service required and shall conform to the
following specifications or shall be the product of the listed manufacturer or similar and equal
thereto as approved by the Owner.
Water Lines
Ductile Iron Pipe and Fittings (North Wilkesboro Water Main and Water Main Jointly
Owned by North Wilkesboro and Mulberry Fairplains Water Association)
All ductile iron pipe and fittings shall conform to ANSUAWWA C151/A21.51, Pressure Class
250 and the following:
(a) Pipe and Fittings
(1) MECHANICAL JOINT PIPE
ANSUAWWA C151/A21.51
(2) SINGLE GASKET JOINT PIPE (PUSH-ON-JO1NT) ANSI/AWWA
C151/A2L51. Bells shall be modified to accommodate a single
gasket type jointing materiaL Modified bells shall be supplied on
pipe only and not on fittings
(3) FLANGED PIPE
ANSUAWWA C115/A21.15
150.
(4) FLANGED FITTINGS
ANSUAWWAC 110/A21.0.
150.
Flanges shall be faced and drilled to ANSI Class
Flanges shall be faced and drilled to ANSI Class
(5) BELL & SPIGOT FITTINGS AND MECHANICAL JO1NT FITTINGS
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Project: R-2603 U- County: Wilkes
ANSUAWWA Cl 10/A21.10 or ANSUAWWA C153/A21.53 latest.
(b) Coatings
(1) OUTSIDE COATING — The coating for the exterior of fittings and pipes required
by ANSI/AWWA C110/A21.10 and C151/A21.51 shall conform to Federal
Specification WW-P 421C.
(2) CEMENT MORTAR LINING OF 1NTERIOR OF PIPE AND FITTINGS -
ANSUAWWA C104/A21.4. All cement lining shall receive a seal coat of
bituminous material.
(3) PROTECTIVE FUSION BONDED EPDXY COATINGS - ANSUAWWA
C116/A21.16.
(4) SPECIAL COATINGS AND LININGS - ANSI/AWWA C104/A21.4.
_Thickwall P.V.G Pressure Pipe (Mulberry-Fairplains Water Association Water Main and
Blue Ridge Water Association Water Main)
All P.V.C. pressure pipe shall conform to AWWA C-900 or C-905, DR-18 (235 PSI).
All fittings shall be ductile iron, mechanical joint fittings. All non-metallic pipe shall be
buried with detector tape.
Service Pipe and Appurtenances
(a) Pipe
(1) Copper Pipe — All water service pipe shall be copper water tube, Type K, soft
temper, for underground service, conforming to ASTM B-88 and B251. The pipe
shall be marked with the manufacturer's name or trademark and a mark indicative
of the type of pipe. The outside diameter of the pipe and minimum weight per
foot of the pipe shall not be less than that listed in ASTM B251, Table 11.
(b) Stops and fittings - All corporation stops and curb stops shall be fabricated of brass and
shall be provided with outlets suitable for copper connections or wiped lead connections
and shall conform to AWWA C-800. Curb stops shall be of the roundway type. Fittings
for lead services shall be of brass suitable for wiped joints. Fittings for copper pipe shall
be copper and of the compression type. The type of threads for all corporation stops and
curb stops shall be standard AWWA tapered threads.
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Project: R-2603 V- County: Wilkes
(c) Service saddles shal be all bronze with double bronze straps and with a neoprene "O"
ring gasket attached to the body. The clamp shall have corporation cock threads. The
clamps shall be as Mueller H-16100 series, Jones J 979 or approved equal.
(d) Meter Boxes - Meter boxes shall be heavy-duty, high-density Polyethylene, one-piece
molded construction with a minimum wall thickness of 0.550 inches, vertical loading
rating minimum of 15,000 pounds, sidewall loading of 200 pounds side load applied with
a 4"x4" plate, multi-tayer wall construction, black exterior surface to provide UV
protection, gray foaming for strength an insulating value, white interior surface for ease
-,- of ineter reading, and flush, cast iron cover . The meter box shall be of adequate size
with the base of ample size to completely house the services stop. Box covers shall be
furnished with the cover labeled "WATER METER".
Valves, Hydrants and Appurtenances
Tee intersections will have two valves, one on the -L- Line water main and one on the -Y- Line.
Cross intersections shall have at least three valves as directed by the Engineer.
The Contractor shall place a new fire hydrant and take possession of the old fire hydrant in
all locations for the pay item, "Relocate Fire Hydrant" without egceptions. All hydrants
shall have a hydrant valve on the hydrant leg.
(a) VALVES
(1) Unless otherwise required by the Project Specification or the Contract Drawings,
all buried valves shall be gate valves.
(2) Gate valves shall be non-rising stem valves with a 2 inch square operating nut,
designed to take full pressure on either face furnished in full compliance with
AWWA C500 or C509. All valves shall open by turning to the left unless
otherwise specified.
(3) All valves shall be of ample strength to withstand and operate satisfactorily under
the working pressures and shall be subject to the test pressures both expressed in
pounds per square inch below:
Cold Water Pressure in Pounds Working: 150
Per Square Inch Test: 300
(4) Bolt holes on flanged end valves shall straddle the vertical centerline unless
otherwise indicated on the Contract Drawings.
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Project: R-2603 -% County: Wilkes
(5) Gate valves to be installed in a horizontal position in a horizontal line which are
designed for working pressures lower than 150 pounds, in sizes 16 inches and
larger, shall be equipped with bronze rollers and bronze tracks secured to the
body. Gate valves smaller than 16 inches shall have double cast iron disk, bronze
mounted seat rings, parallel seat O-ring seals with bronze stem and stem nuts. All
buried valves shall be Mechanical Joint. All valves shall be iron body bronze
mounted gate valves with 2" square operating nuts.
(b) VALVE BOXES
(1) Valve boxes shall be supplied for all buried valves unless they are to be housed in
valve basins. Valve boxes shall be made of good quality cast iron and shall be of
the sectional type. The lower section shall be a minimum of five and one quarter
(5-'/4) inches in diameter, enlarged to fit around the bonnet of the valve, if a two
section box is used, or to fit a circular or oval base section if three section box is
used. The upper section shall be arranged to screw down over the adjoining lower
section and shall be full diameter throughout. Two (2) piece valve boxes shall be
used on all valves up to those four (4) feet deep. Valves deeper than four (4) feet
shall utilize SDR-41 or thicker PVC barrel extensions between the cast iron box
sections. Valve boxes shall be provided with cast iron lids or covers. Lids or
covers shall be marked "WATER". The over-all length of valve boxes shall be
sufficient to permit the top to be set flush with the established ground surface
grade.
(2) All valves not in pavement or concrete shall be set in a circular concrete ring.
(c) HYDRANTS
Fire hydrants shall comply with all requirements of ANSUAWWA C502 (latest
revision), plus further design requirements listed herein, and shall be by American
Darling.
Hydrants shall have a minimum valve opening of 4'/2". They shall be "dry top",
"traffic model", furnished with two (2) each 2%2" hose nozzles and one (1) each
4%2" steamer nozzle with caps and chains. Nozzle threads shall be National
Standard.
Fire Hydrants shall be rodded with two (2) 3/4" rods with bitumastic coating and
blocked with concrete. Concrete shall be the same as blocking required for a 6
inch diameter 90° bend.
Furnish a pentagonal operating nut measuring 1 1/z" from point to flat. Hydrants
shall OPEN by turning the operating nut to the left (counter clockwise). Hydrants
shall be suitable for setting in a 3'-6" trench unless deeper settings are required
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Project: R-2603 U- County: Wilkes
and indicated in the Bid Form. Provide a 6" mechanical joint base with MJ
accessories. Hydrants shall be painted red.
Hydrants shall incorporate the following design features:
A WEATHER SHIELD shall be provided between the operating nut and the
hydrant cover. Additionally, a weather cap shall be affixed which conceals
the hold- down nut. It shall be embossed with an arrow indicating the
opening direction.
A TRAVEL STOP NUT shall be provided in the "head" of the hydrant to
eliminate further compressive loading of the hydrant rod after the hydrant
has reached its full open position. Travel stop devices in the "base" or main
valve area are not acceptable.
A DRY TOP LUBRICATION CHAMBER with triple "o-ring" seals shall
be provided for protection and lubrication of the rod and operating nut
threads. Hydrants shall be provided with an anti-friction thrust washer.
A TRI�FFIC FLANGE (two piece) shall be provided at the ground line, and
installed in accordance with the manufacturer's recommendations and
installation instructions.
A BREAKABLE ROD COUPLING (one piece) shall be provided at the
groundline connection of the upper and lower rods. Provide pin and cotter
key fastening for easy removal of the coupling.
A BRONZE DRAIN RING shall be provided with integral, external drain
ports. The drain ring shall be secured between the lower barrel and base
flanges. The valve assembly shall be secured to the drain ring by bronze to
bronze threading. The drain ring and valve assembly shall provide a totally
bronze drain system. The drain system shall have a minimum of two (2)
internal and two (2) external ports as a part of the all bronze drain system.
Drain ports in the base and partially bronze lined drain systems are not
acceptable.
Drain closure shall be by conventional double facings of an approved material
other than leather. Hydrant valve top shall be bronze.
All flanges shall be integrally cast or "screwed-on". Snap or retainer ring (loose
flange) design is not acceptable.
Hydrants shall be capable of being extended (raised) at the ground line in 6"
increments. "Stacking" of extensions will not be permitted.
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Project: R-2603 - County: Wilkes
Hydrant design shall permit seat removal by use of a SHORT BODY "T" wrench
which shall engage the upper hydrant rod. Designs requiring disassembly at the
groundline are not acceptable.
Hydrant manufacturer shall have existing authorized stocking distributors
currently serving the area of this project.
Master Water Meters
All master water meters depicted on the drawings shall be new 8-inch, AMR (automatic meter
reading) compound water meters with a positive displacement chamber to measure low flow and
a turbine chamber to measure high flow. The meter body shall be constructed of bronze, lead
free copper alloy and meet the requirements of AWWA 702 and NSF/ANSI Standards 61 and
372 and comply with the lead-free provisions of the Safe Drinking Water Act. Each meter shall
be compatible with the AMR system used by the individual utility. Acceptable
manufacturers are Badger, Neptune, and Omni.
Method of Measurement
Pay Item "Relocate Master Water Meter" will be measured on a"per each" basis.
Basis of Pa.�ment
All labor and materials, fittings, appurtenances, connections, equipment and testing for a
complete installation in accordance with the contract drawings shall be incidental to the cost of
installation.
Trenchless Installation
All pipe lines 2-inches and smaller, including water services shall be dry bored. Trenchless
installation shall be in accordance with the NCDOT Standard Specifications for Roads and
Structures, dated July 2012.
Roadway Crossin�s
Pipe lines greater than 2-inch diameter crossing the line of traffic from the opposite side of the
road from the main line shall be installed by open cut. Detours shall be implemented so that only
one lane of traffic shall be shutdown at any time during the pipe line installation. Lane closures
and detours shall be in accordance with NCDOT Standard Specifications for Roads and
S�ructures, dated July 2012.
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Project: R-2603 -1 County: Wilkes
Sewer
For installations deeper than 12 feet, and when specified on the drawings ductile iron shall be
used for mains and services, otherwise use PVC.
Ductile iron pipe and fittings used for sanitary sewers shall be manufactured in accordance with
AWWA Standards G150 and C-110 respectively. The minimum pressure class pipe shall be
class 250. Pipe shall be supplied in 18 or 20 foot nominal lengths. Pipe and fittings shall have a
minimum working pressure of 250 psi, and minimum iron strength of 30,000 psi. Ductile iron
may be used for any sewer main 8-inch and larger. Pipe joints shall be the "Push-on" type
manufactured in accordance with AWWA Standard G111-95.
PVC gravity sanitary sewer pipe and related fittings shall be manufactured in accordance
with all the requirements of ASTM D-3034-98 SDR 35 Type PSM polyvinyl chloride sewer pipe
and fitting. PVC gravity sewer pipe may be used for 4, 6, 8, 10, 12 or 15 inch mains and shall be
supplied in 12.5 foot lengths with bell-and-spigot joints. All fittings shall use rubber gaskets,
which conform to the requirements of ASTM F477-99.
The Contractor shall install new manhole rings and covers at all locations where tops of
existing manholes are raised or lowered to meet proposed changes in final grade.
Concrete Pier
Concrete piers shall be used to support pipes at all stream crossings, where, in the opinion of the
Engineer, such piers are necessary. Such piers shall be constructed as shown on the utility plans.
The concrete shall meet the requirements of Section 1000 of the Standard Specifications and the
28 day compressive strength shall meet or exceed 3,600 psi.
The reinforcing steel shall meet the requirements of Section 1070 of the standard specifications.
Steel for straps and bolts shall be AISI type 316 stainless steel.
Method of Measurement
Pay Item "Concrete Pier" will be measured on a"per each" basis.
Basis of Pavment
All labor and materials, fittings, appurtenances, connections, equipment and testing for a
complete installation in accordance with the contract drawings shall be incidental to the cost of
installation.
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Project: R-2603 - 1 County: Wilkes
Steel H-Pile Pier
Steel pile piers shall be furnished and installed as shown on the plans, as described in the
provisions herein and in the contract and/or as directed by the Engineer.
Pier locations as shown on the plans shall be considered a guide only, with the final
determination made at the time of construction by the Engineer. Pier spacing center to center
will be shown on the plans, but may be adjusted by the Engineer due to field conditions.
The work covered by this section consists of furnishing and driving piles, as indicated on the
plans, the standard details, and as approved by the Engineer, in conformity with the
specifications and to the bearing and penetration required.
Installation: The pilings shall be driven to obtain a bearing capacity of 10 tons based on the
Standard Specifications and to a minimum depth of 10 feet in undisturbed earth below the
bottom of the creek channel or existing ground. Steel pile piers shall be of the size and
configuration noted on the utility construction plan sheets.
Length: Full length piles shall be used where practicable and no more than one splice of steel
pile will be permitted in making up one full length unless approved by the Engineer. Splices,
where necessary, shall be made to maintain the true alignment and position of the pile sections.
Both pieces of a spliced pile shall be the same shape and size.
Splices must develop not less than 100 percent of the bending strength of the pile and not less
than 100 percent of the axial load strength of the pile. All welded splices will be of butt weld
type with backup plates welded to the flanges and web of the steel piles. All welding of
structural steel in the shop or in the field shall meet the requirements of the AWS and be done by
qualified welders. Certification of welders and welds will be required by the Engineer in
accordance with AWS Code.
Painting: Unless otherwise directed, all steel in the piers shall have a coal tar epoxy coating
consisting of two coats of coal tar epoxy as specified. All surfaces of the steel to one foot below
the disturbed ground shall receive the coating system and shall be thoroughly sand blasted prior
to application to remove rust, dirt, grease, and other foreign material and to provide a clean
surface to receive the coating. Each coat of paint shall be approved by the Engineer prior to
application of the next coat. The total dry film thickness shall be at least 16 mils. Areas with
less than 16 mils shall be recoated as required to provide the specified film thickness.
Testing and Inspection: The Engineer will provide inspection and will determine bearing
capacity of the driven piles. The Contractor shall submit the required hammer information as
specified in the Standard Specifications to the Engineer. Test piles which are not to be
incorporated in the completed structure shall be removed to at least 2 feet below the surface of
the ground or the stream bed, and the remaining hole backfilled with earth or other suitable
material.
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Project: R-2603 -1 County: Wilkes
Pipe cradle shall be welded to steel plate as noted on the utility construction plan sheet details;
spacing shall be sufficient to cradle pipe without lifting pipe from steel plate. Pipe cradle shall
be welded to the steel piles. All welds shall be fillet welds and in conformance with the
applicable AWS Structural Welding Code.
Straps and bolts shall be galvanized steel and straps shall be hot asphalt dipped. Straps shall be
2" wide and %2" thick. Radius shall be 1/z outside diameter of pipe.
Holes shall be drilled in strap and shall be 1/16" larger than bolt diameter. Bolts shall be 3/4"
diameter, 4" long, fully threaded, with flat washers top and bottom, and 3/4" nuts.
All steel shall be ASTM A36 steel.
Pipe cradles, straps, bolts, nuts and washers shall be considered incidental to steel pile piers.
Method of Measurement
Pay Item "Steel H-Pile Pier" will be measured on a"per each" basis.
Basis of Pavment
All labor and materials, fittings, appurtenances, connections, equipment and testing for a
complete installation in accordance with the contract drawings shall be incidental to the cost of
installation.
II. COMPENSATION:
No direct payment will be made for utility construction work required by the preceding
provisions, which are general requirements applying to utility construction, and all of the
requirements stated will be considered incidental work, paid for at the contract unit prices of the
various utility items included in the contract.
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