Water Service Construction Standards

26 Pages·2011·0.27 MB·English

DESIGN CRITERIA

FOR

WATER MAIN EXTENSIONS
AND
APPURTENANCES

GENERAL REQUIREMENTS
MATERIAL SPECIFICATIONS
CONSTRUCTION SPECIFICATIONS

Meadville Area Water Authority

Adopted August 23, 2004
Amended November 24, 2008

Prepared by
REVISIONS

November 24, 2008 – 2000.09 Service Lines and Appurtenances for Meters, paragraph G - Added
polyethylene (PE) as an option for service lines under 2-inches, page 11.
Table of Contents

200.00 GENERAL REQUIREMENTS...............................................................................................3
200.01 SCOPE.....................................................................................................................................3
200.02 FEES........................................................................................................................................3
200.03 APPLICATION PROCESS.....................................................................................................3
A. Make Application.....................................................................................................................3
B. Obtain Preliminary Approval From Governing Municipality................................................4
C. Water Service Agreement.......................................................................................................5
D. As-Constructed Drawings.......................................................................................................5
E. Dedication of Water Line.......................................................................................................5
200.04 DEVELOPERS ENGINEERING REVIEW..........................................................................5
A. Design Factors........................................................................................................................5
B. Water Consumption................................................................................................................5
C. Fire Flow Requirements.........................................................................................................5
E. Sizing Water Mains................................................................................................................6
F. Dead Ends...............................................................................................................................6
G. Private Fire Connections.........................................................................................................6
H. Services...................................................................................................................................6
I. Determination of Maximum and Minimum Pressures Within the System.............................6
J. Location of Appurtenances.....................................................................................................7
K. Fire Hydrants and Blow-Offs.................................................................................................7
200.05 MATERIAL STANDARDS....................................................................................................7
200.06 PIPE and FITTINGS................................................................................................................7
A. Ductile Iron Pipe (DIP)...........................................................................................................7
B. Ductile Iron Fittings................................................................................................................8
C. Polyvinyl Chloride (PVC)......................................................................................................8
D. Polyvinyl Chloride (PVC) Fittings.........................................................................................9
200.07 VALVES AND VALVE BOXES..........................................................................................9
A. Valves – Gate (3-inch and larger)...........................................................................................9
B. Valves (2-inch and under)......................................................................................................9
200.08 FIRE HYDRANTS.................................................................................................................9
200.09 SERVICE LINES..................................................................................................................10
E. Curb Boxes...........................................................................................................................11
F. Meter Pits for Traffic Areas..................................................................................................11
G. Service Lines and Appurtenances for Meters.......................................................................11
I. Backflow Prevention – Commercial, Industrial, and other..................................................12
J. Pressure Reducing Valves....................................................................................................12
K. Shut-off Valves Before and After the Meter........................................................................12
L. Meter Installation..................................................................................................................12
200.10 GENERAL CONSTRUCTION SPECIFICATIONS.............................................................13
A. PA ONE CALL.....................................................................................................................13
B. Responsibility for Safe Storage and Replacement of Damaged Material............................13
C. Work To Be Done.................................................................................................................13
D. Grade and Alignment............................................................................................................13
E. Depth of Pipe and Backfill...................................................................................................13
F. Handling of Water Main Material into Trench.....................................................................14
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G. Cleaning Pipe and Fittings....................................................................................................14
200.11 EXCAVATION AND PREPARATION OF TRENCH.......................................................14
A. Trenching..............................................................................................................................14
B. Traffic Control......................................................................................................................14
C. Minimum Trench Widths.....................................................................................................14
E. Excavation to Grade.............................................................................................................14
F. Protection of Property and Surface Structures......................................................................15
G. Bedding.................................................................................................................................15
H. Allowable Removal of Pavement.........................................................................................15
200.12 INSTALLATION OF PIPE...................................................................................................15
A. General..................................................................................................................................15
B. Bell Ends to Face Direction of Laying Permissible Deflection at Joints.............................16
C. Unsuitable Conditions for Laying Pipe................................................................................16
D. Thrust Blocking....................................................................................................................16
F. Blow-Offs on Dead End Lines.............................................................................................17
G. Setting Hydrants...................................................................................................................17
200.13 BACKFILLING TRENCHES...............................................................................................17
200.14 PRESSURE TESTING OF WATER LINE..........................................................................17
A. Testing Water Distribution System......................................................................................17
200.15 DISINFECTION PROCEDURE FOR NEW WATER LINES.............................................18
200.16 DISINFECTION PROCEDURES AFTER CUTTING INTO OR REPAIRING EXISTING
LINES...................................................................................................................................20
200.17 BACTERERIOLOGICAL TESTS.......................................................................................20
200.18 CLEANUP OF WORKSITE................................................................................................20
A. Cleaning Up..........................................................................................................................21
B. Backfill of Roadway.............................................................................................................21
200.19 FINAL ROAD RESTORATION.........................................................................................21
A. Replacement of Street/Road.................................................................................................21
200.20 APPROVED MANUFACTURERS OF MATERIALS.........................................................22
ATTACHMENT 1 – Typical Trench Details.....................................................................................24
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200.00 GENERAL REQUIREMENTS
200.01 SCOPE
The design criteria for water distribution systems presented hereinafter offers basic
standards for use in the design process. Each application will be reviewed on a case
by case basis by the Meadville Area Water Authority, (the “Authority”) engineer.
The decision of the Authority is final. Reference material contained herein, as well
as additional information, may be obtained from the “Rules and Regulations
Governing Water Service of the Authority, Construction Standards of Municipalities,
BOCA, AWWA, ASTM and PADEP Public Water Supply Manual Part II.
200.02 FEES
The owner/developer of such parcel of land to be developed at the time of construction
plans submittal shall pay to the Authority a nonrefundable deposit of five hundred
($500) dollars. The plan review fee provides for the costs of service performed by the
Authority including, but not limited to, planning, engineering review of plans, legal
services, inspection of construction, and all other technical and administrative services
provided relative to extensions to the existing Authority water system. Should the cost
exceed $500, the Owner will be charged the additional fees. Any monies unexpended
from the deposit upon completion of the project shall be returned to the
owner/developer.

Item Fee
Plan review $500.00
Inspection Services performed by the Authority $25 per hour
Inspection Services performed by the Authority’s Actual cost billed to the
engineer Authority
Water consumption for filling and flushing main Standard Rate Charge x five
(5) times the volume of the
main extension
Legal Fee Actual cost billed to the
Authority

200.03 APPLICATION PROCESS
Any person, firm, or corporation desiring to have water service made available to a
particular area or subdivision and to be served by the AUTHORITY shall:
A. Make Application
At own expense submit four (4) copies of detailed plans and specifications of
the distribution system signed and sealed by a Pennsylvania licensed
professional engineer in conformance with the regulations of the Authority.

1. The plans for water mains and appurtenances shall show all appropriate
physical features adjacent to the proposed water mains along with horizontal
and vertical controls and hydrant coverage. Other utilities, such as sanitary
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and storm sewers, manholes, etc., shall be shown on the plans with
horizontal and vertical separation distances meeting PADEP standards –
Public Water Supply Manual Part II.

2. Plans for water distribution mains must be submitted to the Authority for
review and approval. The plans must be prepared on 24” x 36” plan sheets
and the four (4) sets submitted must be of quality suitable for reproduction.
Each sheet of a set of plans must bear a signed and dated imprint of a
Pennsylvania professional engineer’s seal.

3. The title sheet for a set of plans generally contains the following: Name of
project, name of municipality, area to be served, municipal officials’ names,
index of drawings, date, address, and names of the design engineer (in
addition to seal).

4. The general layout sheet shall include a large scale map of the entire
distribution system showing the corporate or utility district boundaries.
Existing and planned utilities shall be shown with line sizes noted and easily
distinguishable between existing and planned. The layout sheet shall
incorporate both a north arrow and scale and if the area to be served is
obscure, a location plan shall be provided showing the municipality or utility
district in relation to surrounding towns, streams, and noted landmarks.

5. All plans shall be on the state plane coordinate system NAD 1983 U.S.
Survey Feet, PA Zone North. Vertical benchmark shall be a USGS
benchmark (NAD 1983). Drawings are to include PA One Call number with,
serial number(s) and a listing of all known utilities.

6.. The plan sheets shall be drawn at a scale not greater than 1 inch equals 200
feet and be complete with north arrow, scale, street and road names, existing
utilities, planned utilities, and installation notes with locations shown for all
valves, hydrants, and other appurtenances. The plan sheets shall also
provide adequate descriptions of any features not otherwise covered by the
specifications. The planned water distribution mains shall have adequate
notes and stationing system to aid in the location of the water lines and
appurtenances.

6. Any feature of construction which requires additional clarification to that
shown on the plan sheets shall be drawn in detail on profile and/or detail
sheets. Each detail shall cover thoroughly the dimensions, equipment,
materials, method of construction, and any clarifying notes to aid in
construction of the item.
B. Obtain Preliminary Approval From Governing Municipality
Owner/developer/contractor shall secure the approval of the plans and
specifications in writing from the governing municipality. The preliminary
approval shall contain the names, addresses and phone numbers of municipal
contacts.
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C. Water Service Agreement
Following Authority’s engineer’s review of plans, the Authority and the
owner/developer/contractor shall enter into a Water Service Agreement
outlining the responsibilities of the owner/developer/contractor, Authority, bond
requirements, legal fees, inspection costs, easements and right-of-ways required,
and etc.

The Authority may request a pre-construction conference prior to the start of
construction of the water system extension.
D. As-Constructed Drawings
Following the end of construction of the water distribution mains, the tracing
shall be revised to reflect any deviations from the plans and provide the precise
field location of the water mains, valves, hydrants, services, and other
appurtenances. Three copies of the As-Constructed drawings and electronic
CADD (Microstation or AutoCAD, latest version) files on CD media shall be
submitted to the Authority.
E. Dedication of Water Line
Upon Authority approval of all As-Constructed Drawings, easements and right
of ways the water line will be dedicated to the Authority.
200.04 DEVELOPERS ENGINEERING REVIEW
An engineer’s report shall be written and submitted to the Authority for review. This
report shall address all applicable points as set forth by these specifications.
A. Design Factors
The source of water supply for the distribution system under design shall be
thoroughly investigated to ascertain that it can supply the average and peak daily
demands imposed upon it by the proposed system without loss or burden to the
existing customers supplied by it. The normal working pressure in proposed
extension should be approximately 40 - 80 psi.
B. Water Consumption
In addition to fire flow requirements, water mains and distribution systems shall
be sized for normal and peak daily demands of required consumption.
C. Fire Flow Requirements
The proposed extension shall be investigated for the fire flow that can be
provided while maintaining no less than 20 pounds per square inch residual
pressure in the remainder of the distribution system. The fire flow information
shall be provided to the local municipality and operating fire company for
comment. The guidelines of the Insurance Services Office (ISO) and related
agencies shall be used to determine the minimum flow allowable. Include
contact information and phone numbers for municipalities, fire companies, etc.
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D. Minimum Line Size
The minimum size of water distribution mains shall be that which is required to
provide the maximum daily demand plus fire flow while maintaining adequate
residual pressure. The minimum size of pipe allowable by the Authority is 8-
inch diameter unless otherwise approved by the Authority.
E. Sizing Water Mains
Water mains shall be sized to provide the maximum daily demand plus
anticipated fire flow plus any foreseeable future demand while maintaining a
minimum of 20 pounds per square inch residual pressure at all points in the
proposed extension and the existing system. The pressure losses due to friction
must be calculated from the storage or pumping facilities using typical system
flows as well as the flows required by the distribution mains being added.
F. Dead Ends
Dead ends shall be minimized to assure adequate water quality and maximize
fire flows. Loop and grid connections shall be used whenever feasible. The
Authority has the final approval for all dead ends.
G. Private Fire Connections
Private fire connections shall be constructed using ductile iron pipe and
appurtenances.

The minimum back flow prevention device shall be a double check valve
assembly. The Authority has the right to require additional or alternative
backflow prevention devices, including reduced-pressure zone devices.
H. Services
All services shall have a separate service line, complete with all appurtenances,
except meter, to the property line.
I. Determination of Maximum and Minimum Pressures Within the System
In the determination of the proper pressure class of pipe materials for use in the
system, consideration must be given to the maximum and minimum pressures
that will be encountered. The following factors must be considered when
determining pressure within a system:

1. Highest and lowest elevations of pipelines;
2. High and low levels in the water storage reservoirs;
3. Booster pumping stations - suction and discharge pressures;
4. Fire flow requirements;
5. Special control valves, i.e., pressure reducing valves in the system;
6. Surge allowance and water hammer;
7. Customer water usage (present and future); and
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8. The normal working pressure in the extension should be approximately
40 to 80 psig. If above 60 psi, provide pressure reducing valves at each
service connection.
J. Location of Appurtenances
1. Control valves (gate valves), at minimum, shall be placed at all
intersections of water mains. In straight runs of of pipes, place valves no
less than 500 feet apart.

2. The Authority reserves the right to require placement of additional
valves at any location deemed necessary.

3. Safety valves (air release, pressure reducing, etc.) shall be installed in
appropriately designed manholes, vaults or chambers and at such
locations as deemed necessary for the safe, reliable operation of the
distribution system.
K. Fire Hydrants and Blow-Offs
In general, fire hydrants for residential areas shall be spaced at 350 - 600 feet or
less and/or at street intersections, whichever is less; for commercial areas, not
more than 500 feet and at street intersections, whichever is less; and for public
and institutional properties, a number and spacing to accommodate the needed
fire flows with adequate back-up spacing. A fire hydrant shall be located at the
end of each extension for both fire protection and line flushing. Blow-off
hydrants shall be installed at the end of dead end lines and at each location
required to provide adequate flushing of the mains. The spacing of hydrants
shall be approved by the municipality and the fire chief of the municipality.
200.05 MATERIAL STANDARDS
All material used in the Meadville Area Water system shall conform to AWWA, ANSI, and
ASTM standards. Approved manufacturers on some items have been specified in order to
maintain consistency of the distribution system. Any materials or products not specifically
addressed herein will be reviewed by the Authority on a case by case basis. All plans and
material shall be reviewed by the Authority’s professional engineer and manager who shall
provide comments for the final approval of the Authority. All materials that come in contact
with potable water shall meet NSF-61 standards.
200.06 PIPE and FITTINGS
A. Ductile Iron Pipe (DIP)
Ductile iron pipe shall be designed in accordance with AWWA C151 (ANSI A21.50).
Ductile iron pipe wall thickness shall meet AWWA C150 (ANSI A21.50) latest edition.
Buried ductile iron pipe shall have pressure class designation of 350. Exposed flanged
joint ductile iron pipe used in vaults, chambers, etc, shall be Class 53.

The interior of the pipe shall have a cement-mortar lining in accordance with AWWA
C104 ANSI A21.4, double thickness, and NSF-61 approved asphaltic seal coated in
accordance Section 4-11, Seal Coat of AWWA C104.
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The exterior of the buried and exposed pipe shall have asphaltic coating in accordance
with Section 51-8, Coating and Linings, AWWA C151.

Buried joints shall be either push-on, mechanical, or restrained joints conforming to
AWWA C111. Exposed piping used in chambers, vaults, etc. shall be flanged. Flanged
joints shall conform to AWWA C115. Flanges to be Class 125, faced and drilled in
accordance with ANSI B16.1. Joints furnished complete with all accessories necessary
for makeup of particular joint involved (glands, bolts, nuts, gaskets, etc).

B. Ductile Iron Fittings
Gray iron or ductile iron conforming to applicable provisions of AWWA C110 or
ductile iron compact fittings conforming to AWWA C153. Minimum working pressure
rated at 250 psi.

Fittings are to be mechanical or restrained joint conforming with applicable provision of
AWWA C111. Provide wedge action retainer glands at mechanical joints. Restrained
joint fittings shall have identical joints as restrained joint pipe.

The fitting lining shall be cement mortar lined in accordance with AWWA C104,
double thickness and asphaltic seal coated in accordance with Section 4-12, Seal Coat,
of AWWA C104. Seal coatings NSF 61 approved.

Exterior surface of buried and exposed fittings shall have standard asphaltic coating in
accordance with Section 51-8, Coating and Linings, AWWA C151.

C. Polyvinyl Chloride (PVC)
Polyvinyl chloride (PVC) pipe shall be manufactured in accordance with AWWA C-
900 latest edition. AWWA C-900 PVC pipe is pressure rated for each Dimension Ratio
(DR). Push on type joints, either integral bell or coupling shall include gasket and
lubricants to conform to AWWA C900 latest edition.

Use of PVC is subject to Authority approval.

SIZE DIMENSION PRESSURE AVERAGE LENGTH
RATIO CLASS O.D.
(inches) (DR) (PSI) (inches) (feet)
4 14 200 4.80 20
6 14 200 6.90 20
8 14 200 9.05 20
10 14 200 11.10 20
12 14 200 13.20 20

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