CHAPTER 8 - Design & Construction Standards for Water Distribution and Supply System
8.02 General Requirements
8.03 Design Standards
8.04 Right-of-way and Easement Dedications
8.05 Town's Participation in Cost
8.06 Service Connection Fee Schedule
8.07 Specifications and Special Provisions
8.08 Standard Details
8.02 GENERAL REQUIREMENTS
All developments shall be designed so the proposed water distribution and supply system does and accomplishes the following:
- Conforms with the Town of Normal Comprehensive Plan.
- Extends water mains through the proposed development to
serve otherwise un-served abutting properties.
- Provides adequate capacity including maximum fire flows
to serve all the lots proposed to be served by the line, plus
any additional extensions to the main which might be made to
develop property in the same pressure zone with the type of
uses and to the maximum density permitted by the then-existing
zoning ordinances of the Town with respect to the property within
the corporate limits and the land use element of the Town's
Comprehensive Plan for proposals outside the corporate limits.
- Permits private wells only in the following instances:
- Outside the corporate limits,
- More than twenty thousand (20,000) square feet (1850
sq. m) in the lot served; and
- In complete conformance with Illinois Environmental
Protection Agency and McLean County Health Department standards.
- If a public water supply is not reasonable available.
- Outside the corporate limits,
- Maintains separation from public or private sewer or septic
systems.
- Loops water mains so as to avoid dead-end.
- Private water supply systems, including but not limited to wells, holding tanks, and piping, which are no longer in active use shall be abandoned in accordance with all State, County, and City regulations. The Owner of the property shall provide documentation to the Water Department that the system has been properly abandoned.
8.03 DESIGN STANDARDS
- Provide water service and an individual shut-off valve and
box located in the public right-of-way between the sidewalk
and the back of curb for each lot. In developments with private
streets a shutoff valve and box shall be located not more than
6 ½ feet from the back of curb or the water main, whichever
is greater. A service line stub extended to a point +/- two (2)
feet from the property line or easement line which, upon recording
of the final plat, will become a lot of record. A water service
connection of type "K" copper must be provided for and centered
on each lot of record in residential subdivisions. Size and
location of service connections in commercial or industrial
subdivisions is to be determined and installed only if a specific
use is known beforehand and in accordance with Illinois State
Plumbing Code.
- Water mains shall be so designed so that looped water mains
do not reconnect to the same source main unless there is no
alternative whereupon the connections must be a minimum of 500
feet (150m) apart or have a valve located between the two connections.
- Provide steamer type fire hydrants at each intersection
of two or more streets or roadways, and provide additional steamer
hydrants so that hydrants are spaced at intervals not exceeding;
four hundred (400) feet (120m) in areas zoned single family
and two family residential, and not exceeding two hundred fifty
(250) feet (75m) in area otherwise zoned. All hydrants shall be steamer type.
(Amended 4/17/06 by Ord. No. 5068)
- Hydrants located at other than street intersections are
to be positioned adjacent to the side-yard lot line of two adjoining
properties so as to achieve the nearest approximation of hydrant
spacing interval required for a specific zoning designation.
If pipe joints or other utility conflicts prevent locating at
the nearest side-yard lot line, proceed to the next nearest
lot line.
- Hydrants are not to be located closer than ten (10) feet
(3m) from any light standard, tree, signpost, or other permanent
structure that would impede access to the hydrant or reduce
its visibility.
- All in-line valves shall be installed at intervals not to
exceed six hundred (600) feet (180m).
- Valves shall be placed at each branch connection and an
in-line valve shall be located near the branch upstream or downstream
from each branch.
- Provide water mains having an inside diameter with a minimum
of eight (8) inches (200m) nominal pipe size. All pipes shall
be DUCTILE IRON Class 52.
- Water mains shall not be located closer than ten (10) feet
(3m) horizontally, or eighteen (18) inches (450mm) vertically
when crossing, any public or private sanitary, storm sewer,
drain or manhole.
- If a subdivision is constructed in phases creating temporary
dead-end water main, a valve and fire hydrant must be installed
at each temporary terminus.
- Whenever water mains must enter side yard easements, when
the depth of pipe cover exceeds eight (8) feet, and where water
mains must cross watercourses, railroads or interstate highways,
a valve shall be provided at both ends of the easement or crossing.
- There shall be no connection or potentially possible connection
between the Public Water Supply system and any pipes, pumps,
hydrants or tanks from another system whereby unsafe water or
other contaminating materials may be discharged or drawn into
the Public Water Supply.
- No water main shall be in rear yard easements. (Amended
4/17/06 by Ord. No. 5068)
- Ductile iron pipe, fittings, and valves shall be encased
in polyethylene encasement sleeves that consist of linear low-density
polyethylene, 8-mil thickness, Class C (black) conforming to
the requirements of AWWA C105/ANSI A21.5-99.
- All water main materials shall meet or exceed AWWA specifications.
8.04 RIGHT-OF-WAY AND EASEMENT DEDICATIONS
All water mains shall be installed in public easements or dedicated public right-of-way. Such easements and rights-of-way to be of sufficient width and the water mains to be installed at such locations as to permit open cut installation, maintenance and repair within the confines of the easement or right-of-way without relocation or unreasonable interference with other public utilities located therein and so as to meet the following minimum standards:
- Have a minimum width of fifteen (15) feet (5m), plus five
(5)(1.5m) for each additional utility, plus ten (10) feet (3m)
if width abuts private property on two or more sides.
- An additional ten (10) feet (3m) of width if a water main is to be installed parallel to a sanitary sewer, so that the two utilities will be at least ten (10) feet (3m) apart.
8.05 TOWN'S PARTICIPATION IN COST
- Water Mains
Where installation of water mains of larger capacity than required to serve land owned by the developer is required by the Board of Trustees to serve future growth in the vicinity of the development, the developer shall pay for only his portion, based on the Code requirements for his development, of the total cost of the installation; the balance to be borne by the Town. Provided funds are available, the Town will pay the difference in the cost between the size required for the developer's land and the larger size required. If there is an existing tap-on charge as required in Section 7.11 of the Municipal Code, then the developer shall abide by it.
- Engineering Costs
The developer will be responsible for all engineering costs for design of water main facilities within his/her development.
8.06 SERVICE CONNECTION FEE SCHEDULE
At the option of the developer, he or she can elect to have the Water Department to provide the material, labor and equipment to install water services complete, including curb stop and box, from the existing water main to the property line for the fee as stated in the current schedule as provided by the Water Director for the Town of Normal. All fees must be paid in advance and a minimum of two (2) working days advance notice must be received before work will proceed.
If street opening or boring is required, the numbers of traffic lanes to be crossed and type of road construction shall govern the cost. If an open cut must be made on a rigid concrete pavement constructed after 1970, replacement will be required from contraction joint to contraction joint. Cost of replacement shall be additional and be based on prevailing costs.
8.07 SPECIFICATIONS & SPECIAL PROVISIONS
All water mains shall use materials and be installed in such manner meeting or exceeding the required standards and specifications contained in the Standard Specifications for Water and Sewer Main Construction in Illinois, the then- current edition as then modified, supplemented and amended by this Manual or the Town Engineer or the Water Director. These modifications, amendments and amplifications have been provided in this Chapter of the Manual.
Special Provisions Modifying Standard Specifications for Water and Sewer Main Construction in Illinois
DIVISION IV - WATER DISTRIBUTION
Applicable sections of this Division also apply to Force Main Construction.
40-2 PIPE MATERIALS
Force mains and water mains shall be ductile iron pipe Class 52 with single gasket joints.
40-2.02 DUCTILE-IRON PIPE
Add the following:
Cement lining and tar (seal) coating shall be provided for all pipe. All pipes shall have push-on type joint unless otherwise called for.
Where restrained joints are specified, they shall meet one of the following:
- U.S. Pipe: TR Flex Joint
- American Ductile Iron Pipe: Flex-Ring Joint
- Mc Wayne (Clow): Super-Lock
- Griffin Pipe: Snap-Lok or Bolt-Lok
- Ebba Iron Meg-a Lug
- Approved equal
40-2.05 PIPE FITTINGS
Add the following:
Water main fittings incorporated into this work shall conform to A.N.S.I./ A.W.W.A. C110/A21.10 and A.N.S.I./ A.W.W.A. C111/A21.11, 250 psi rated pressure. All fittings shall have the same linings and coatings as the pipe supplied. All fittings (including but not limited to bends, tees, reducers and plugs) shall be restrained with retainer glands (Meg-a-Lug) or a manufactured joint restraining system approved by the Water Director.
| Service Size | Corp. Stop | Curb Stop | Curb Box |
|---|---|---|---|
| 1" | Mueller H-1500 AY McDonald 4701-22 |
Mueller H-15200 AY McDonald 6100-22 |
Mueller H-10314 AY McDonald 5601 |
| 1 1/2" | Mueller H-1500 AY McDonald 4701-22 |
Mueller H-15200 AY McDonald 6100-22 |
AY McDonald 5603 |
| 2" | Mueller H-1500 AY McDonald 4701-22 |
Mueller H-15200 AY McDonald 6100-22 |
AY McDonald 5603 |
40-2.06 SERVICE PIPE, STOPS, FITTINGS & BOXES
Add the following:
All fittings shall be ductile iron. (Amended 4/17/06 by Ord. No. 5068)
Cement lining is required for fittings.
40-2.06C STOPS AND FITTINGS
Corporation stops shall be Mueller H-15, Clow F-4408 or equal. Curb Stops shall be Mueller H-15200, Clow 4540 or equal. Curb boxes shall be Mueller H-10, 314, Hays 5833 or equal, 4'-5' (1.2-1.5m) adjustment with stationary operating rod.
40-2.07 SPECIALTY VALVES
Tapping machine valves and sleeves shall be Style 6114 CLOW valve with Cascade CST-SL tapping sleeve or approved equal. (Amended 4/17/06 by Ord. No. 5068)
41-2.02A DEPTH OF PIPE COVER
Minimum depth shall be four feet (1.2m).
41-2.02B PIPE FOUNDATIONS AND UNSUITABLE TRENCH CONDITIONS
Change first sentence to read:
For pipe beddings see Section 20-2.20A (1)b
41-2.13A PRESSURE TEST
Test pressure shall be not less than 100 psi.
41-2.13C LEAKAGE TEST
(1) Change test pressure requirement to 100 psi.
41-3 MEASUREMENT
CAST IRON FITTINGS: If proposal does not contain an item for fittings, the cost of furnishing and installing fittings shall be included in the unit price bid for the various mains.
45-2.02 HYDRANT DETAILS
In second paragraph - bury depth shall be five feet (1.5m).
In fourth paragraph - Hydrant with 6-inch (150mm) connections shall be furnished with a 4" (100mm) pumper nozzle only if steamer hydrants are called for on the plans.
RECURRING SPECIAL PROVISIONS FOR WATER MAIN IMPROVEMENTS
Coordination of Work
The Contractor shall coordinate his operations with the Town Water Department. The chlorination, pressure testing and sampling of the new mains shall be done with Town of Normal Water Department supervision. No compensation shall be allowed for this work. All costs to be included in the unit prices bid for the various pipe items.
Pipe laying
Pipe laying is to be provided in accordance with the latest revisions to AWWA C-600 Standards. This takes precedence over any other specifications.
Laying Operations
Contractor's attention is directed to the fact that he must not allow any foreign material to enter the main such as tools, clothing, dirt, etc., while the main is being constructed. At times when pipe laying is not in progress, the open end of the pipe shall be closed by watertight plug. All trenches must be pumped dry preceding any pipe laying operations.
Water & Sewer Crossing
In cases where a water main crosses a storm sewer or sanitary sewer and proper separation cannot be provided, the Contractor shall construct the sewer as outlined in Division IV, Section 41-2.01C of the Standard Specifications for Water and Sewer Main Construction in Illinois, latest edition. Should the Contractor elect to encase the water main with ductile iron or steel pipe, the water main shall be installed with Cascade or other approved casing spacers and the ends of the casing sealed with bituminous seals with weep holes for the annual space between the casing and water main. Before starting either of the above operations, the Contractor shall notify the Director of Water or the Town Engineer and have the method approved.
Retainer Glands
Retainer Glands shall be furnished for all valves, except in line valves, and all bends on the main line greater than 11-1/4 ( + or - ). Retainer glands shall be Megalug or approved equal. Internally restrained joint type water main may be used in lieu of retainer glands.
Gate Valve and Box
Valve Boxes shall be Tyler 3855 Series with two-piece, cast iron boy or Armor Roadway with two-piece, non-metallic body. All valve covers shall be "stay put" or four (4) pronged traffic type with "WATER" stamped on the surface, and shall be constructed of cast iron. The entire upper section of the box shall be made of a magnetically locatable material and have a cast iron ring.
Gate Valves shall be CLOW Resilient Wedge (RW), F6100 Model
2638, or approved equal. Gate valves must conform to AWWA C-509
or AWWA C-515 and have ductile iron bodies. All valves must have
stainless steel bonnet bolts. All valves shall open left and
have non-rising stems.
(Amended 4/17/06 by Ord. No. 5068)
Steamer Fire Hydrants
The unit price bid for Steamer Fire Hydrant shall include all labor, material and equipment required to construct this item in accordance with the Hydrant connection - Type as shown on the Standard Details in the plans, excluding the Valve and Box. The unit price bid for 6" (150mm) Valve and Box shall be paid for all valves on hydrant leads in addition to the unit price bid for Steamer Fire Hydrant Connection of type specified.
Where Steamer Fire Hydrants are called for, they shall have a 5-1/4 inch main valve of the compression type that closes with pressure. They shall have an O- ring stuffing box and a 6-inch Ringtite or equal joint opening. The hydrant shall have a break (traffic) flange. The operating nut shall be National Standard which opens by turning counterclockwise. Each hydrant shall have two 2-1/2 inch hose nozzles, and one 4-inch pumper nozzle. They shall conform in all respects to the Standard Specifications of the American Waterworks Association for Fire Hydrants. They shall be one of the following: Clow #2500, Mueller Centurion, Waterous Pacer, or Kennedy Guardian or U.S. Pipe.
Setting Hydrants
Each hydrant shall stand plumb and shall rest on a pre-cast solid concrete block base. Under and around the drip of each hydrant shall be placed not less than one-third cubic yard of broken stone not less than 1 inch in size. All fittings and valves in connection with the fire hydrant shall be the anchored type. No hydrant shall be placed closer than 2-1/2 feet (0.7m) from back of curb or edge of pavement to the centerline of hydrant.
Fire Hydrant Extension
The unit price bid for this item shall include all labor, material, and equipment to adjust new hydrants in the vertical direction above the standard 5-foot (1.5m) bury hydrant. This pay item will only compensate for those hydrants shown on the plans requiring extensions and those hydrants installed at a lower depth as directed by the Engineer in order to avoid conflicts with existing utilities. All other hydrants requiring extensions after installation not meeting these conditions shall be extended at the contractor's cost. This work will be paid for by unit price bid per vertical foot for Fire Hydrant Extension. Extensions shall be made in 6-inch (150mm) increments to the height required at each hydrant.
Setting Tees and Bends
All tees and bends shall be restrained in addition to adjacent pipe in accordance with recommendations of D.I.P.I.
Restrained Joints
All joints as recommended by D.I.P.I. shall be restrained. All restrained joints shall be Megalug.
Connections to Existing Mains
If the connection to an existing water main requires a shutdown of the existing main, the Contractor shall notify all users of the affected main a minimum of 48 hours ahead of the shutdown. The Contractor shall re-chlorinate that portion of the existing water main that is shutdown before it is put back into service. The Contractor shall provide the necessary blocking or restraining of the existing main when he makes the new connection.
Tapping Valve, Sleeve and Box
When connections to existing mains are to be made, the Water Department shall do all the work that is required to make the connection, including making the actual tap and supplying the tapping valve, sleeve and box. Contractor shall make all excavations and coordinate his operation with the Town of Normal Water Department personnel who will perform the tap. The contractor shall make all excavation required for side-tapping existing mains. The contractor shall provide an 8 foot x 4 foot hole, oriented with the 4 foot dimension along the water main to be side-tapped, from one foot behind the tap location to 7 feet perpendicular to the existing main along the alignment of the future main. The depth of the excavation shall be one foot below the existing water main. The contractor shall insure that excavation is in compliance with Occupational Safety and Health Act (O.S.H.A.) regulations for safety. All costs shall be included in the unit cost for Tapping Valve, Sleeve, and Box of the size specified.
Leakage Test
When performing a hydrostatic pressure test, all water used must be potable and contain a chlorine residual of not less than 0.2 parts per million of free chlorine or 0.5 parts per million of combined chlorine. The hydrostatic pressure test will be made in accordance with ANSI/AWWA C-600 latest edition. The hydrostatic pressure shall be 100 psi (690 kpa) for at least one-hour duration and not vary more than 5 psi (35 kpa). Before applying the specified test pressure, the air shall be expelled from the pipe. The allowable leakage shall be determined by the following formula:
L = SD P
133200
L = allowable leakage in gallons per
hour
S = length of pipe in feet
D = nominal diameter of pipe in inches
P = average test pressure during test in psig
All visible leaks are to be repaired regardless of the amount of leakage. After the hydrostatic test has been successfully completed, the main shall be flushed attaining the minimum velocity of at least 2-1/2 feet per second (0.75 mps). Flushing must continue until all particulate matter and discoloration has been removed. (Amended 4/17/06 by Ord. No. 5068)
Flushing of New Mains
There will be no charge by the Town of Normal to the Contractor for the water used to flush the mains, provided it is not necessary to flush the mains more than three times. If it is necessary to flush the mains more than three times, then the Contractor will be charged by the Town of Normal for water used to flush the mains. The Contractor shall provide and install any hose necessary to direct the water being flushed away from any area it might damage. The contractor shall take whatever precautions necessary during flushing to prevent ecological damage to any receiving stream, lake or other body of water.
Sampling and Chlorinating Taps
At the extreme ends of the proposed new water main or at locations as directed by the Director of Water, sampling and chlorinating taps shall be installed by the Contractor in accordance with the details as shown on the plans. After the chlorinating, the Town of Normal Water Department approves sampling and testing, the corporation stop shall be shut off and the piping removed from the corporation stop.
Disinfection of Mains
Disinfection following flushing must be accomplished by either the continuous feed method or slug method. The tablet method is not acceptable and is not to be used except with the expressed written permission of the Director of Water. A chlorine residual of at least 50 parts per million must be attained initially and 25 parts per million residual present after 24 hours when the preferred continuous feed method is used. If the slug method is used, 300 parts per million must be retained for a minimum of 3 hours, or 500 parts per million retained for 30 minutes. The Town of Normal Water Department must verify attainment of initial and final chlorine residuals. Disinfecting chlorine doses shall not remain in the pipe for more than 24 hours.
In order to provide proper conditions for disinfection following construction, installation option 'A' or 'B' must be followed.
- A minimum of three low density foam swabs shall be introduced
into the first unit of pipe being installed and shall remain
until the job is completed whereupon the swabs shall be propelled
a minimum of three times, or until water is clear, in the direction
of the extreme ends of the construction project during the initial
filling and flushing process. When a dead-end main is involved
the contractor may return the swabs to the point of origin by
using another water source with sufficient volume and pressure
to propel the swabs, or he may retrieve the swabs at the exit
point and reintroduce the swabs at the origin repeating the
process until exit water is clear. The process must be performed
on every run of pipe from each branch of newly constructed water
main. In cases where foam swabs are too large to be retrieved
from a fire hydrant, an exit tee or wye and a means of directing
the water away from the trench must be provided. All swabs that
are use must be accounted for when cleaning is completed.
- Each unit of pipe, fitting and valve shall be hand swabbed
or otherwise mechanically cleaned with a prior approved method
before installation, and a cap or plug inserted in the pipe
and retained until just prior to joining with the next unit
of pipe. Two caps or plugs must be utilized, one inserted in
the last unit of pipe laid and one to be used in the unit of
pipe being prepared for installation. The plug or cap in the
last unit of pipe installed shall not be removed until the next
pipe unit is lowered into the trench and is ready to be inserted.
At the end of each working day a watertight plug or cap
shall reside in the last unit of pipe or fitting installed,
until construction resumes. During installation workman's hands,
gloves, rags, tools, or any other foreign object must not be
introduced into the open ends of any previously cleaned pipe.
If dirt or mud is kicked into or falls into the open ends of
the pipe during handling or joining, re-cleaning of the pipe
or fitting affected must be performed. Cleaning must be clear
water containing a minimum of 10 ppm chlorine, and shall be
changed whenever appropriate. Muddy or overly discolored cleaning
solutions shall not be used at any time
In the event a project is constructed where a flushing velocity of two and a half feet per second (2-1/2 fps) (0.75 mps) cannot be attained the hand cleaning method must be employed. Where the hand cleaning method is employed, chlorine in the form of high test hypochlorite (HTH) may be introduced into each unit of pipe during construction to satisfy the disinfection requirements, providing a minimum of fifty parts per million (50 ppm) of chlorine is present in both ends of the new main following initial filling.
Bacteriological Testing
After disinfection, bacteriological testing must be done to insure the public health of the main. All samples must be collected by a designated sample collector of the Town of Normal Water Department and tested at an IEPA approved laboratory.
Water mains that fail the initial bacterial test shall be flushed again before additional sampling is commenced. If the second sample also fails the bacterial test, then disinfection shall be repeated and flushing prior to additional sampling shall be required. If the third sample fails the bacterial test, then the Director of Water shall determine the next step.
Trench Backfill
Approved compacted granular material shall be required in all trenches extending two feet either side of all sidewalks, driveways and street pavements.
Curb and Gutter Crossing
Contractor may remove and replace the curb and gutter at the street crossings or he may tunnel the curb and gutter at his option. All excavated material shall be disposed of off site and the trench backfilled with approved compacted granular material.
Curb Marking of Water Services: At the time the curb and gutter is poured, the contractor shall mark the top of the curb with a permanent “W” (for water) to mark location of the curb box.
Pavement Removal and Replacement
All Street Pavement Removal and Replacement shall be done in accordance with Chapter 2 of this Manual.
Damage to Existing Structures
If damage is done to existing or new structures during construction of the proposed improvement, they shall be replaced or repaired in a satisfactory manner by the Contractor at his own expense.
Utilities
The utility companies shall be notified of the impending project and the plans indicate the general location of the utility main lines. The Contractor shall have the responsibility before any construction work has begun, of obtaining from all utilities the exact location of any underground facilities in the area of construction, whether indicated on the plans or not. Any facilities disturbed by the Contractor shall be restored by him at his own expense. The Contractor shall coordinate with the proper utility the relocation of any facility designated on the plans or deemed necessary to be relocated by the Engineer in order to complete construction of the project.
Residents shall be notified a minimum of 24 hours in advance of impending service outages, and no residence shall be without service overnight.
