Sanitary sewers shall be installed in accordance
with the design standards set forth in this chapter. Materials and
construction requirements shall be as specified by the Pennsylvania
Department of Environmental Protection, the Township, the Township
Engineer and as follows:
A. Materials.
(1) All pipe for sanitary sewers up to fifteen-inch diameter
will be polyvinyl chloride (PVC) pipe and fittings conforming with
requirements of ASTM D 3034, SDR 35 and shall have a cell classification
of 12454-B or ductile iron pipe conforming to AWWA C151, latest revision,
thickness class 52. Minimum size for laterals shall be six inches.
(2) Sanitary sewers larger than fifteen-inch diameter
may be vitrified clay, extra strength, or reinforced concrete pipe
conforming to ASTM Specification C-76, latest revision, with reinforcing
conforming to ASTM Specifications A-82, A-185 or A-15, latest revisions.
All concrete sanitary sewer pipe shall have a protective coating applied
to the inside consisting of two coats of coal tar epoxy, total thickness
10 mills.
(3) Ductile iron pipe for force mains shall be manufactured
in accordance with AWWA C151, latest revision. All mechanical joints
and fittings shall conform to ANSI Specifications A21.10 and A21.11
as applicable. All pipe and fittings shall be bituminous coated inside
and outside.
(4) Gaskets shall be made of vulcanized natural or synthetic
rubber compound. No reclaimed rubber shall be used. The trade name
or trademark, size and year of manufacture shall be molded in the
rubber.
(5) Bolts and nuts shall conform to the dimensions specified
in ANSI Standard A21.11, latest revision. Bolts and nuts shall be
coated with a rust-preventing lubricant.
(6) All pipe delivered to the site shall be accompanied
by a letter from the manufacturer certifying that the pipe furnished
complies with the requirements for the class of pipe specified.
(7) Manholes shall be precast reinforced concrete conforming
to ASTM Specifications C478, latest revision, constructed on poured
in place concrete bases having a twenty-eight-day compressive strength
of 2,500 psi when tested in accordance with ASTM Specifications C39
and C192, latest revisions.
(8) Joints for sanitary sewers shall be "O" ring conforming
to ASTM Specification C425, latest revision, vitrified clay pipe and
ASTM Specification C443, latest revision, for reinforced concrete
pipe. All joints for PVC pipe shall utilize a rubber ring gasket type
coupling, approved by the Township Engineer.
(9) Service laterals shall be connected to the collector
sewers through use of a "Y" branch and a "bend." "T" branches will
not be permitted.
(10)
Manhole frames and covers must be heavy-duty,
have a minimum clear opening of 24 inches, weigh not less than 350
pounds, be equal to Neenah Foundry Company Model R-1642, conform with
the requirements of ASTM A48 (Class 30), and shall have the words
"LTA Sanitary Sewer" cast thereon in letters two inches high. The
covers shall be self-sealing, bolted, watertight manhole frames and
covers, equal to Neenah Foundry Company Model R-1919, installed as
determined by the Township Engineer.
B. Installation.
(1) All pipe laying shall carefully progress uphill with
hubs upgrade and ends fully and closely jointed. The interior of all
pipe and fittings shall be kept free from dirt and foreign matter
at all times. Trench widths shall not exceed the outside diameter
of the pipe plus 16 inches, and depths shall be as required. Trench
walls shall be vertical and bottoms shall be horizontal.
(2) All pipe shall be laid in a special envelope of material
conforming to AASHTO specifications for No. 57 coarse aggregate. The
pipe envelope shall be a minimum thickness of six inches below the
bottom (outside barrel) extending the full width of the flat trench
bottom and extending vertically at full trench width to a minimum
height of 12 inches above the top outside barrel of the pipe.
(3) Until placed in use, the ends of all service laterals
and "Y" branches installed for future use shall be stopped with plugs
fitting with the same "O" ring joint as the sewer pipe.
C. Backfill. After proper installation of the pipe and
special envelope, backfilling with PennDOT Type 2RC aggregate may
be performed. All backfill shall be thoroughly compacted through the
use of approved mechanical tampers and water jetting as directed.
D. Final inspection and testing.
(1) Testing shall be performed as directed by lamping
and the application of water and/or air tests. All sewers must be
laid true to line and grade between manholes and must pass a visual
test of straightness. If infiltration in any test section exceeds
100 gallons per inch diameter of pipe per mile of length in 24 hours
or if exfiltration exceeds 100 gallons per inch diameter of pipe per
mile of length in 24 hours, the system will not be accepted or certified
for use until corrections are made. No infiltration or exfiltration
will be permitted within 200 feet of water supply sources. In addition,
the Township may require low-pressure air testing in accordance with
ASTM C828, latest revision.
(2) The developer must notify Lehigh Township at least
two days in advance of performing any of the sewer trench excavation
or pipe installation work so that inspection personnel can be present.
Any work completed prior to such notification will not be considered
acceptable.
Water supply and distribution systems and fire
hydrants shall be installed in accordance with the design standards
set forth in this chapter. Materials and construction requirements
shall be as specified by the Township, the Township Engineer and as
follows:
A. Materials.
(1) All pipe shall be ductile iron pipe manufactured in
all respects to conform to ANSI Specifications A21.51 (AWWA C151),
current edition, and shall be Class 52. The design internal pressure,
including the normal working pressure plus a 100 psi surge pressure,
shall be 250 psi minimum. The pipe shall be cement lined in accordance
with AWWA C104, current edition; double thickness lining (Section
4.8.2) shall be provided. All pipe shall be paint seal coated inside
and bituminous coated outside. Joints shall be of the push-on type,
similar in all essential respects to "Tyton," and shall conform to
the requirements of ANSI A21.11 (AWWA C111).
(2) All fittings and special pipe shapes, adapters, etc., required for closures, branches, bends, connections to mainline valves and other piping, etc., shall conform to the same requirements as specified for pipe in Subsection
A(1) above.
(3) Valve type.
(a)
All shutoff valves 12 inches and smaller shall
be resident seated gate valves with nonrising stems, and shall be
constructed of heavy-duty cast iron. Valves shall be two-inch nut
operated opening to the left, have bronze mountings, be equipped with
"O" ring stem seals, and have double-disc parallel seats. They shall
have a working pressure rating of 200 psi, and conform to AWWA C-509.
Joints shall be of the mechanical type. Gate valves shall be Mueller
Company, American Valve and Hydrant or approved equal.
(b)
All gate valves larger than 12 inches shall
be the double-disc type, bronze mounted, parallel seat with bronze
wedging surfaces; valves 16 inches and larger shall be installed horizontally
with gear box, rollers, tracks, scrapers and bypass. Gate valves shall
conform to AWWA C-500 or the developer may substitute butterfly valves
conforming to AWWA Standard C-504 as manufactured by Mueller Company
or approved equal.
(4) All gate and butterfly valves shall be provided with
heavy-duty, three piece Buffalo type, cast iron, screw adjustable
valve boxes. All boxes shall be of the appropriate length, have a
5 1/4 inch inside diameter shaft, and be furnished with a cover having
the word "water" cast thereon. They shall be completely painted both
inside and outside with bituminous paint. Valve boxes shall be Mueller
Company H-10357 or approved equal.
(5) Corporation stops shall be installed at all lateral
connections. They shall be Mueller Company H-10010 or equal for use
with air release valve installations and Mueller Company H-15000 or
equal for other services.
(6) All water piping of two-inch diameter and smaller
used in air release valve installations shall be Type L hand-drawn
copper tubing conforming to ASTM Specification B88. Changes in direction
in copper piping shall be made using 125 pound brass screwed fittings.
(7) Copper tubing installed underground shall be Type
K, annealed. Fittings used underground shall be cast brass, flared
or compression type.
(8) Curb stops and boxes shall be installed on all services.
Curb stops shall be of the size specified and of the "O" ring type.
Curb stops shall be Mueller Mark II Oriseal with drain or equal.
(9) Curb boxes shall be heavy-duty cast iron of the appropriate
length (at least four feet deep) with a 2 1/2 inch inside diameter
shaft, and coated inside and outside with asphalt paint. They shall
be the screw adjustable Buffalo type and shall have the word "water"
cast on the lid. Curb boxes shall be Mueller Company H-10350 or equal.
(10)
Fire hydrants shall be of the three-way compression
type having a five-and-one-quarter-inch main valve opening, six-inch
mechanical joint inlet connection, two-and-one-half-inch hose nozzles
and one four-and-one-half-inch pumper nozzle all opening to the left.
Threads shall be "National Standard" type. The hydrants shall be of
the low profile breakable coupling type capable of withstanding 300
psi test. They shall be painted above ground with two coats of a high
quality paint manufactured for this type of work. Color shall be selected
by the Township. Below ground surfaces shall be coated with bituminous
paint. Fire hydrants shall be Mueller Company A-423.
B. Installation.
(1) The trench width shall be the outside pipe diameter
plus 16 inches, and the depth shall be as required for the pipe and
bedding. Trench walls shall be vertical and bottoms shall be horizontal.
A minimum cover over the pipe of four feet shall be provided.
(2) Prior to laying the pipe in the trench, a bedding
of AASHTO No. 57 coarse aggregate, shall be placed on the trench bottom.
This material shall be three inches minimum depth, thoroughly compacted
with approved mechanical tampers. The bedding shall be graded by hand
to provide a uniform and continuous bearing support for the pipe throughout
its entire length. Bell holes shall be provided at the ends of pipe
lengths to prevent bearing on the joints, but the size of the holes
shall be kept to the minimum required to make the joint. The bell
holes shall then be backfilled with bedding material which shall be
compacted and brought up to the height of the adjacent material.
(3) All pipe and fittings shall be carefully examined
for cracks and other defects while suspended above the trench immediately
before installation into final position. Pipe shall be laid with bell
ends upgrade. Every precaution shall be taken to prevent foreign material
from entering the pipe, fittings, etc., while it is being placed.
(4) Unless otherwise directed, all valves shall be set
truly vertical. All gate valves shall be provided with a valve box.
The tops of the valve box shall be set to the grade of the surface
of the existing ground unless directed otherwise.
(5) Fire hydrants shall be installed vertically and, if
necessary, shall be properly braced during backfilling. A gravel bed
for proper drainage of the hydrant shall be provided.
(6) Corporation stops shall be installed and placed at
a forty-five-degree angle with the vertical center line of the pipe.
Copper laterals shall be installed in one continuous length of pipe
in an approved manner from the corporation stop to the curb stop and
box. The curb box shall be installed vertically over the curb stop,
and the top shall be set to the grade of the finished surface of existing
ground unless otherwise directed.
(7) Thrust blocks shall be applied at all tees, fire hydrants,
crosses, plugs, caps, bends and valves as directed. The blocks shall
be four-thousand-pound concrete poured neatly on solid ground and
against undisturbed trench walls.
C. Backfill. Between the bedding material and one foot
over top of the pipe, the backfill material shall conform to AASHTO
specifications for No. 57 coarse aggregate. Frozen material shall
not be used. The backfill material up to one foot on top of the pipe
shall be placed in six-inch layers. Each layer shall be solidly rammed
down and tamped around the water main with approved mechanical tampers.
The remainder of the trench, shall be refilled either by hand or equipment
in layers not to exceed six inches in thickness. The material used
to backfill this portion of the trench shall be PennDOT type 2RC aggregate.
All backfill material shall be thoroughly compacted.
D. Hydrostatic and pressure test.
(1) All water lines shall be tested in the field, in the
presence of the Township Engineer or an authorized assistant together
with a representative of the developer in the manner prescribed. The
developer shall diligently follow an approved testing program, in
order that approval and acceptance of completed lines may be given.
In the event the developer fails to conform to an approved testing
program, such failure shall be considered by the Township Engineer
as noncompletion of construction.
(2) After the pipe has been laid and partially backfilled
between joints, and all service connections and fire hydrants have
been installed, each section of pipe between valves or temporary plugs
shall receive the following hydrostatic tests, conforming with the
Township's latest standards, but no less than the following:
(a)
The pipe shall be slowly filled with water and
tested at a pressure 50% above normal working pressure, as determined
by the Township Engineer, but in no case less than 150 psi, based
on the elevation of the lowest point of the line or section under
test. The pressure shall be applied by means of a pump connected to
the pipe in a manner satisfactory to the Township Engineer. A meter
to measure makeup water shall also be installed. The pump, pipe connection,
taps into the pipe and all necessary apparatus shall be furnished
by the developer. Before applying the specified test pressure, all
air shall be expelled from the pipe.
(b)
All exposed pipes, fittings, valves and joints
shall be carefully examined during the open-trench test. Any cracked
or defective pipes, fittings or valves discovered in consequence of
this pressure test shall be removed and replaced by the developer
with sound material and the test shall be repeated until satisfactory
to the Township Engineer. Should the developer elect to backfill the
entire trench, or any portion thereof, prior to testing, the developer
shall locate and repair any leaks which occur during this test.
(c)
While the test pressure is being maintained,
all exposed pipes, fittings, valves and joints shall be inspected
for leaks. Leakage shall not exceed 10 gallons per day per inch of
pipe diameter per mile of pipe. The test pressure shall be maintained
for a period of not less than one hour if joints are exposed and four
hours when joints are covered.
(3) A hydrostatic pressure test similar to the test described
above shall be conducted on all water lines installed aboveground
or inside buildings or structures, except that no leakage will be
permitted.
Storm drainage systems shall be installed in
accordance with the design standards and requirements set forth in
this chapter, by the Township, by the Township Engineer, and as follows:
A. General criteria.
(1) Reinforced concrete pipe shall be used for all storm sewer lines,
including retention/detention facilities. Smooth-lined high-density
polythylene pipe with watertight joints may be used subject to review
by the Township Engineer. All pipe materials shall meet PennDOT requirements.
Storm sewers shall have a minimum diameter of 15 inches. The Manning
Equation shall be employed in computing pipe capacities. Sewers shall
be installed on sufficient slopes to provide a minimum velocity of
three feet per second when flowing full.
[Amended 6-14-2011 by Ord. No. 2011-1]
(2) Open channels shall be designed to handle, without
overflowing, the calculated runoff from a storm as specified in this
chapter. A minimum freeboard of six inches shall be provided for all
swales. The capacities of any modifications to natural channels shall
be computed using the Manning Equation.
(3) Headwalls shall be used where storm runoff enters
the storm sewer horizontally from a natural or man-made channel. The
capacity of such storm sewers shall be evaluated using both Manning's
Equation and inlet/outlet control procedures. The lower flow derived
from these two procedures shall be the design capacity of the storm
sewer.
(4) On curbed streets, inlets shall be placed at points
of abrupt changes in the horizontal or vertical directions of storm
sewers, at points where the flow in gutters exceeds three inches,
and at a maximum distance of 600 feet apart. At intersections, the
depth of flow across through streets shall not exceed one inch. The
Manning Equation shall be used to calculate the capacities of gutters.
Pennsylvania Department of Transportation two-feet-by-four-feet and
two-feet-by-six-feet special inlets or equivalents should be used
and should be spaced in accordance with the design procedures outlined
in PennDOT Design Manual, Part 2. Manholes may be substituted for
inlets at locations where inlets are not required to handle surface
runoff.
B. Materials. Materials and construction requirements
shall be as specified by the Township, the Township Engineer and as
follows:
(1) Reinforced cement concrete pipe, Class III, and coated
corrugated galvanized steel pipe, shall comply with PennDOT SP 408,
Section 601.
(2) Joints for concrete pipe shall be of the "O" ring
Type III per current ASTM Specifications C425 or mortared type as
approved.
(3) Manholes shall be precast reinforced concrete conforming
to the current ASTM Specification C478, constructed on poured concrete
bases having a twenty-eight-day compressive strength of 3,000 psi
when tested per current ASTM Specifications C39 and C192.
(4) Manhole frames and covers must be heavy-duty, have
a minimum clear opening of 21 inches, weigh not less than 450 pounds,
and be equal to Neenah Foundry Co. Model P-1030 or Campbell Foundry
Co. Pattern 1004 and shall have the words "storm sewer" cast thereon
in letters two inches high.
C. Installation.
(1) All pipe laying shall carefully progress uphill with
hubs upgrade and ends fully and closely jointed. Trench widths shall
not exceed the outside diameter of the pipe plus 16 inches and depths
shall be as required. Trench walls shall be vertical and bottoms shall
be horizontal.
(2) Prior to laying the pipe in the trench, a bedding
of AASHTO No. 67 shall be placed on the trench bottom. This material
shall be a minimum of four inches in depth and thoroughly compacted
with approved mechanical tampers. The bedding shall be graded by hand
to provide a uniform and continuous bearing support for the pipe throughout
its entire length. Bell holes shall be provided at the ends of pipe
length to prevent bearing on the joints.
D. Backfill. After proper installation of the pipe, backfilling
may be performed. All backfill shall be thoroughly compacted through
the use of approved mechanical tampers and water jetting as directed.
The trench shall be backfilled for the entire width and depth with
PennDOT Type 2RC crushed aggregate.
E. Structures. Concrete work for inlets, endwalls and
other appurtenances shall be performed in an approved manner, and
basically in accordance with Sections 704 and 1001 of PennDOT Form
408, current edition.
F. Within the PRRC Zone, the perimeter of the water surface associated
with the maximum pool elevation in a basin for a twenty-five-year
runoff event shall be set back 150 feet from an exterior property
line adjoining an existing residential lot line along the perimeter
of the PRRC zoning district, or as otherwise required by the Pennsylvania
Department of Environmental Protection and Lehigh Valley Planning
Commission regulations, using whichever of the three standards that
provides the largest setback distance. In addition, the perimeter
of the water surface associated with the maximum pool elevation in
a basin for a 100-year runoff event shall be set back a minimum of
100 feet from any principal residential building or 25 feet to any
other type of principal building.
[Added 3-8-2016 by Ord.
No. 2015-13; amended 10-27-2020 by Ord. No. 2020-5]
Before the Township Board of Supervisors shall
cause its approval to be endorsed upon the final plans of any subdivision
or land developments (except in the case of minor subdivision wherein
the Board of Supervisors imposes no condition or conditions for the
approval of the plan), and as a requirement for the approval thereof,
the owners shall enter into a written agreement with the Township
in the manner and form set forth by the Township Solicitor where they
shall agree:
A. Site improvements. To construct, or cause to be constructed,
at his own expense, all streets, curbs, sidewalks, fire hydrants,
streetlights, drainage facilities, street signs, monuments, capped
sewers, parks and other improvements shown on said final plan, when
required to do so by the Township Board of Supervisors in accordance
with the final plans, as finally approved, and in strict accordance
with this chapter.
B. Off-site improvement. The subdivider shall be required
to pay the entire cost of providing and extending all necessary and
required improvements to the subdivision or land development, such
as the extension of sanitary and storm sewer and water lines and the
construction of streets. In addition, the Township may require a subdivider,
as a condition for approval of a subdivision or land development,
to pay the entire share of the cost of providing necessary street
improvements and water and sewerage and drainage facilities, and easements
therefor, located outside the property limits of the subdivision or
land development but necessitated or created or required by construction
or improvements within such subdivision or land development.
C. Maintenance. To maintain at his own cost the said
streets, curbs, sidewalks, drainage facilities, street signs, parks,
monuments, fire hydrants, streetlighting, capped sewers and other
improvements, until the same are accepted by the Township for public
use, and for a period of 18 months thereafter, to repair and reconstruct
the same or any part or one of them when such repair or construction
shall be specified by the Township Board of Supervisors as necessary
by reason of faulty construction, workmanship or materials, and, at
or before acceptance of such improvements by the Township.
D. Easements and releases. To obtain the easements and
releases required when any street or drainage facility abuts or traverses
lands of parties other than those holding title to the lands of subdivision,
at his own cost, and obtain from the owner of the lands so abutted
or traversed full releases from all damages which may change in grade,
construction, or otherwise, of the street, drainage facility or other
improvements, and such releases shall insure to the benefit not only
of the owner of the subdivision but to the Township as well.
E. Fees. To promptly reimburse to the Township reasonable engineers' fees as specified in §
147-57 hereof, together with all other costs and fees permitted by law.
F. Surety. To execute security documents in the name
of Lehigh Township in the amount of the estimated cost of all required
improvements, attached to the specific parcel of land being subdivided.
G. Acceptance.
(1) When the developer has installed or constructed all
required improvements as set forth herein the developer shall notify
the Township Board of Supervisors, in writing, by certified or registered
mail, of the completion of the aforesaid improvements and shall send
a copy thereof to the Township Engineer. The Township Board of Supervisors
shall, within 10 days after receipt of such notice, direct and authorize
the Township Engineer to inspect all of the aforesaid improvements.
The Township Engineer shall, thereupon, file a report, in writing,
with the Township Board of Supervisors, and shall promptly mail a
copy of the same to the developer by certified or registered mail.
The report shall be made and mailed within 30 days after receipt by
the Township Engineer of the aforesaid authorization from the Board
of Supervisors; said report shall be detailed and shall recommend
approval or rejection of said improvements, either in whole or in
part, and of said improvements, or any portion thereof, shall not
be recommended for approval by the Township Engineer, said report
shall contain a statement of reasons for such nonapproval or rejection.
The Township Supervisors shall notify the developer, within 15 days
of receipt of the engineer's report, in writing by certified or registered
mail of their action.
(2) If any portion of the said improvements shall not
be approved or shall be rejected by the Township Board of Supervisors,
the developer shall proceed to complete the same and, upon completion,
the same procedure of notification, as outlined herein, shall be followed.
(3) If the Township Board of Supervisors or the Township
Engineer fails to comply with the time limitation provisions contained
herein, all improvements will be deemed to have been approved and
the developer shall be released from all liability, pursuant to its
security documents.
(4) Nothing herein, however, shall be construed a limitation
of the developer's right to contest or question by legal proceedings
or otherwise, any determination of the Township Board of Supervisors
or the Township Engineer.