B.
Street cross-sections.
(1)
The typical cross-sections for grading, paving, underdrains, and
sidewalks shall be as shown in the following figures:
(2)
Cul-de-sac layouts shall conform with the details shown on Figures
ST-4 and ST-5.[2]
[2]
Editor's Note: The Streets figures are included as an attachment to this chapter.
(3)
Streets shall conform to either the "swale street" or "curb street"
design as shown on Figures ST-2 and ST-3.[3] Curbs for the "curb street" design shall conform to standards
for mountable curbs as set forth on Figure ST-8. The Township will
not authorize vertical-face concrete curbs except where it is shown
that other designs are not feasible, and only subject to approval
by the Board of Supervisors. Where vertical-face concrete curbs are
authorized, they shall conform to the standards in Figure ST-7.
[3]
Editor's Note: The Streets figures are included as an attachment to this chapter.
C.
Grading and earthwork.
(1)
Clearing and grubbing of the full right-of-way width shall be completed
in accordance with Section 201 of PennDOT Publication 408.
(2)
Excavation shall be completed in accordance with Section 203, 204
and 205 of PennDOT Publication 408.
(3)
Embankment construction shall be completed in accordance with Section
206 of PennDOT Publication 408.
(4)
Road subgrade shall be prepared in accordance with Section 210 of
PennDOT Publication 408.
D.
Pavement underdrains and blind drains.
(1)
Pavement underdrains and blind drains shall be constructed in accordance
with Section 610 of PennDOT Publication 408, except as follows:
(a)
Pipe material shall be either corrugated polyethylene (PE) meeting
the requirements of Section 610.2(a)(3), or polyvinyl chloride (PVC)
meeting the requirements of Section 610.2(a)(4).
(b)
Pipe shall be supplied in straight lengths; coiled pipe is not
acceptable.
(c)
Pipe shall have a minimum diameter of six inches.
(2)
Pavement underdrain and blind drain details are shown on Figure ST-9.[4]
[4]
Editor's Note: The Streets figures are included as an attachment to this chapter.
E.
Pavement structure.
(1)
Geotextile fabric shall be placed on prepared and approved subgrade
prior to placement of subbase. Geotextile fabric materials and construction
shall conform to the requirements of Sections 735 and 212 of PennDOT
Publication 408 for Class 4.
(2)
Subbase shall be constructed in accordance with Section 350 of PennDOT
Publication 408. Subbase shall be placed to a minimum compacted depth
of six inches in the center of the road. The subbase depth will increase
away from the center to accommodate the differences in crown on the
subbase and subgrade.
(3)
Bituminous concrete base course (BCBC).
(a)
All excavation and embankment work in the area of the pavement,
and for a distance of four feet out from the edge of the pavement,
shall have been completed and approved by the Township Engineer prior
to placement of BCBC.
(b)
BCBC material and construction shall conform to the requirements
of Section 305 of PennDOT Publication 408.
(c)
BCBC shall be placed to a minimum compacted thickness of five
inches.
(d)
Bituminous prime coat shall be placed on subbase prior to BCBC
placement, in accordance with the requirements of Section 461 of PennDOT
Publication 408.
(4)
Bituminous concrete binder course ID-2 (binder).
(a)
Binder course material and construction shall conform with requirements
of Section 421 of PennDOT Publication 408.
(b)
Bituminous tack coat shall be placed on BCBC prior to construction
of bituminous binder course in conformance with Section 460 of PennDOT
Publication 408.
(c)
Bituminous binder course shall be placed to a minimum compacted
depth of two inches.
(6)
Shoulders. Shoulders and berms shall be constructed in accordance
with the requirements for subbase in Section 350 of PennDOT Publication
408.
(7)
Utilities in streets. All utilities crossing streets shall be installed
in trenches and backfilled and compacted in accordance with Section
350 of PennDOT Publication 408.
(8)
Pavement restoration. All excavations and restorations in bituminous
pavement shall be constructed in accordance with the details on Figure
ST-11.[5] Saw-cutting and joint sealing shall be performed in accordance
with Section 515 of PennDOT Publication 408.
[5]
Editor's Note: The Streets figures are included as an attachment to this chapter.
(9)
Paving notch detail. New bituminous concrete shall be joined to existing
bituminous concrete in accordance with the paving notch detail shown
on Figure ST-12.
F.
Private streets.
(1)
(3)
Where authorized in a one- or two-family residential development under Chapter 125, Subdivision and Land Development:
(a)
Streets' right-of-way width shall be not less than 50 feet.
(b)
Excepting the provisions of § 29-39F(1)(a), all standards governing public streets shall govern.
G.
Sequence and schedule.
(1)
All paving operations shall conform to requirements set forth in
Section 401 of PennDOT Publication 408, including weather limitations.
(2)
All paving operations, including wearing course placement, shall
be completed within the same construction season, unless an exception
is granted by the Township.
A.
Storm sewer pipe.
(1)
The following pipes are acceptable for use in the Township:
(a)
Reinforced concrete pipe (RCCP) - ASTM C76 Class IV. Joints
shall meet the requirements of ASTM C443.
(b)
High-density polyethylene (HDPE) - AASHTO M294 Type S. HDPE
pipe shall have smooth interior with annular corrugations. All pipe
and fittings shall utilize gasketed joints meeting the requirements
of ASTM D3212.
(c)
Polyvinyl Chloride (PVC) - ASTM D3034 for SDR 35 thickness class,
Type PSM. All pipe and fittings shall utilize gasketed joints meeting
the requirements of ASTM D3212.
(2)
Storm sewer pipe shall be installed in accordance with manufacturer's
recommendations, Section 601 of PennDOT Publication 408, and the details
on Figures SD-1 and SD-2.[1] In the event of a conflict between these references, the
stricter requirements shall be followed.
[1]
Editor's Note: The Drainage and Stormwater Management (SD) Figures are included as an attachment to this chapter.
(3)
Storm sewer pipes constructed through detention and retention embankments
shall have watertight joints meeting the requirements of ASTM D3212.
(4)
Bedding shall be AASHTO No. 67 Type C or better coarse aggregate
conforming to the requirements of Section 703 of PennDOT Publication
408; provided, however, that within water-retaining structures, including
detention and retention basins, selection of bedding material shall
take into consideration the potential for seepage through the bedding
and the need for adequate pipe support, with consideration being given
here to rigid pipe materials and/or concrete bedding.
(5)
At locations not exceeding 100 feet, bedding specified in Subsection A(4) shall be replaced with soil material meeting the following requirements:
(6)
The soil material shall be installed the full width of the trench,
for a minimum of five feet along the trench. The soil shall be placed
in lifts not exceeding eight inches and compacted to not less than
97% of the maximum density in accordance with ASTM D698.
B.
Storm sewer service laterals. All storm sewer service laterals shall
connect to the main storm sewer pipe at manholes, inlets or other
structure locations, or directly to the storm sewer using approved
couplings, fittings and saddles.
C.
Storm inlets.
(1)
Storm inlets in street paving shall conform to the details set forth
in Figures SD-3, SD-4 and SD-5.[2]
[2]
Editor's Note: The Drainage and Stormwater Management (SD) Figures are included as an attachment to this chapter.
(2)
Inlets and top units shall be precast concrete meeting the requirements
of Sections 605 and 714 of PennDOT Publication 408, and the details
shown on Figures SD-3, SD-4 and SD-5. Manufacturers shall be PennDOT
approved or Township approved.
(3)
Structural steel grates shall be bicycle safe meeting the requirements
of Section 605 of PennDOT Publication 408 and Figure SD-7. Whenever
available, cast-iron grates shall be used and grates shall be bicycle
safe and as manufactured by Allegheny Foundry Co., pattern numbers
as shown on Figure SD-3, or approved equal. Cast-iron vane grates
as shown on RC-34 Sheet 4 of 9 of PennDOT Publication 72 shall be
installed in locations directed by the Township Engineer.
(4)
Storm inlets shall be placed at all low points, at street intersections,
at grade changes, and at points along both sides of the street as
required to ensure adequate interception of surface runoff. Inlets
at street intersections shall be placed as shown on Figure SD-2. Additional
inlets shall be constructed in locations directed by the Township
Engineer to provide for proper control of surface water.
(5)
Type D-H inlets shown on RC-34 Sheet 9 of 9 of PennDOT Publication
72 shall be installed in locations directed by the Township Engineer.
(6)
A minimum of one and a maximum of three three-inch precast concrete
riser rings shall be placed on all inlets to provide for adjustment
of grate elevation.
(7)
Pipe shall be cut flush within four inches with the inside face of
inlet box and the annular space grouted watertight inside and out
using approved non-shrink grout.
(8)
A six-inch sump shall be provided in all inlets.
(9)
Steps meeting the requirements of RC-39 Sheet 3 of 5 of PennDOT Publication
72 and Section 605.2(C) of PennDOT Publication 408 shall be installed
in all inlets with a depth greater than five feet.
(10)
The spacing of inlets shall not exceed 300 feet.
D.
Storm manholes.
(1)
All storm manholes shall be precast concrete constructed in accordance
with the details on Figure SD-8.[3] Manholes shall be designed for HS-20 loading
and shall meet the requirements of Section 605 of PennDOT Publication
408.
[3]
Editor's Note: The Drainage and Stormwater Management (SD) Figures are included as an attachment to this chapter.
(2)
Manhole frames and solid covers shall be Allegheny Foundry Co. Pattern
650 and 651, respectively, or Township-approved equal. Grate covers
shall be Allegheny Foundry Co. Pattern 651X, or approved Township
equal.
(3)
Height adjustments shall be made using precast concrete adjustment
rings. A minimum of two and a maximum of three three-inch precast
concrete riser rings shall be placed on all manholes to provide for
adjustment of rim elevations.
(4)
Pipes shall be cut flush with the inside of manhole face and the
annular space grouted watertight inside and out using approved non-shrink
grout.
(5)
Manholes or inlets shall be installed at all changes in grade and
alignment of storm sewers and at other locations as directed by the
Township Engineer to provide access for maintenance.
(6)
A six-inch sump shall be provided in all manholes.
(7)
Steps meeting the requirements of RC-39 Sheet 3 of 5 of PennDOT Publication
72 and Section 605.2(C) of PennDOT Publication 408, current edition,
as amended, shall be installed in all manholes with a depth greater
than five feet.
E.
Structure spacing. The maximum distance between structures (inlets
and manholes) shall be 300 feet unless otherwise approved by the Township
Engineer.
F.
Underground detention facilities.
(2)
Underground detention piping shall be installed in accordance with manufacturer's recommendations. Spacing between adjacent pipes shall be sufficient to accommodate placement and compaction of bedding. Bedding material shall conform with requirements of § 29-40A(4).
(3)
Manway access ports or structures shall be provided at locations
sufficient to facilitate inspection and maintenance and at such other
locations that may be determined by the Township.
G.
Open detention facilities.
(1)
Detention facilities in cut-and-fill (embankment) areas shall be
constructed in accordance with the details shown on Figure SD-10.[4]
[4]
Editor's Note: The Drainage and Stormwater Management (SD) Figures are included as an attachment to this chapter.
(2)
Except as provided below, embankment materials shall meet the requirements
of Section 206.2(a)(1)(a) of PennDOT Publication 408 and shall be
placed and compacted in accordance with the requirements of Section
206.3 of PennDOT Publication 408. In the event the design professional
determines that soils meeting Section 206.2(a)(1)(a) are not suitable
for the intended embankment, alternative specifications for soil material
may be submitted to the Township Engineer for approval.
(3)
Low-flow channels shall be constructed in accordance with the details
on Figure SD-11.
(4)
Provision shall be made for limiting seepage along the outfall pipe/soil
contact surface, including antiseep collars, internal drainage diaphragm
system, etc.
(5)
Outlet control structures shall be constructed of reinforced concrete
as shown in Figure SD-12. Trash rack(s) acceptable to the Township
shall be provided to protect orifice and pipe openings.
(6)
Overflow spillways and exit channels shall be constructed of materials
capable of withstanding expected velocities. Riprap material and construction
shall conform to the requirements of Section 850 of PennDOT Publication
408, current edition, as amended. A typical riprap-lined overflow
spillway detail is shown on Figure SD-13. Other spillway lining materials
(e.g., concrete) may be acceptable, provided they satisfy the design
criteria.
H.
Pipe headwall/endwall. Concrete pipe headwalls and endwalls shall
be constructed in accordance with the details on Figure SD-14,[5] and Section 605 of PennDOT Publication 408.
[5]
Editor's Note: The Drainage and Stormwater Management (SD) Figures are included as an attachment to this chapter.
I.
Pipe outfall protection.
(1)
Erosion protection for pipe outfalls shall be constructed in accordance
with the details on Figures SD-15 and SD-16,[6] and Section 851 of PennDOT Publication 408.
[6]
Editor's Note: The Drainage and Stormwater Management (SD) Figures are included as an attachment to this chapter.
(2)
Dimensions and sizing of pipe outfall protection shall be based on
criteria contained in the PA DEP Erosion and Sediment Pollution Control
Program Manual and FHWA HEC-14.
J.
Sump and downspout connections.
(1)
Sump pump and downspout discharges shall be installed in accordance
with the details shown on Figures SD-6 and SD-9.[7]
[7]
Editor's Note: The Drainage and Stormwater Management (SD) Figures are included as an attachment to this chapter.
(2)
Sump pump and downspout piping, fittings, and accessories shall meet the requirements of § 29-40A(1)(b) or (c) of this Part 2.
(3)
Connections to existing Township storm sewer piping shall be made
using approved fittings as manufactured by Inserta Tee, or approved
equal.
(4)
Cleanouts shall be located as shown on Figure SD-6 and as directed
by the Township Engineer.
(5)
Downspouts that terminate near the house foundation shall discharge
onto concrete splash blocks, prior to conveyance onto vegetated areas.
Dry well infiltration system details are shown on Figure SD-18.
K.
Drainage channels.
(1)
Drainage channels shall be constructed of erosion-resistant material
capable of withstanding the maximum projected velocities during the
design life of the facility.
(2)
Design velocities shall not exceed the maximum permissible velocities
contained in Chapter 4 of the PA DEP Erosion and Sediment Pollution
Control Program Manual.
(3)
Side slopes shall not exceed the maximum suitable side slopes contained
in the PA DEP Erosion and Sediment Pollution Control Program Manual
for the type of material involved.
(4)
Vegetated channels shall be constructed in accordance with the requirements
of Sections 804, 805 and 806 of PennDOT Publication 408. All vegetative
channels shall receive erosion protection treatment in accordance
with Section 806 of PennDOT Publication 408.
(5)
Riprap-lined channels shall be constructed in accordance with the
requirements of Section 850 of PennDOT Publication 408.
L.
Infiltration systems.
(1)
Infiltration trench.
(a)
Provisions shall be made to prevent groundwater contamination
from polluted runoff including petroleum, salts, nutrients, etc.
(b)
Infiltration systems shall not receive runoff until the entire
contributing drainage area to the infiltration system has received
final surface stabilization.
(c)
Heavy equipment and traffic shall be restricted from traveling
over the proposed location of the infiltration trench to minimize
compaction of the soil.
(d)
Excavate the infiltration trench to the design dimensions. Excavated
materials shall be placed away from the trench sides to enhance trench
wall stability. Large tree roots shall be trimmed flush with the trench
sides in order to prevent fabric puncturing or tearing of the filter
fabric during subsequent installation procedures. The side walls of
the trench shall be roughed where sheared and sealed by heavy equipment.
(e)
A Class "2" geotextile meeting the requirements of Section 735
of PennDOT Publication 408 shall be placed at the interface between
the trench side walls and between the stone reservoir and gravel filter
layers. The width of the geotextile must include sufficient material
to conform to trench perimeter irregularities and for a twelve-inch
minimum top overlap. The filter fabric shall be tucked under the sand
layer on the bottom of the infiltration trench for a distance of six
inches to 12 inches. Stones or other anchoring objects should be placed
on the fabric at the edge of the trench to keep the trench open during
windy periods. When overlaps are required between rolls, the uphill
roll should lap a minimum of two feet over the downhill roll in order
to provide a shingled effect.
(f)
A six-inch sand filter layer shall be placed on the bottom of
the infiltration trench, and shall be compacted to 95% modified proctor
density, using plate compactors. The sand for the infiltration trench
shall be a washed aggregate meeting the requirements of AASHTO Size
No. 9 or No. 10 in Section 703 of PennDOT Publication 408. Any alternative
sand gradation must be approved by the Township.
(g)
The stone aggregate should be placed in a maximum loose-lift
thickness of 12 inches. The aggregate for the infiltration trench
shall be washed aggregate meeting the requirements of AASHTO Size
No. 2 or No. 3 in Section 703 of PennDOT Publication 408.
(h)
Following the stone aggregate placement, the filter fabric shall
be folded over the stone aggregate to form a twelve-inch minimum longitudinal
lap.
(i)
After the filter fabric has been placed and seamed, a six-inch
minimum layer of clean, washed aggregate meeting the requirements
for AASHTO No. 8 in Section 703 of PennDOT Publication 408 shall be
placed to the surface to match adjacent ground elevations.
(j)
Care shall be exercised to prevent natural or fill soils from
intermixing with stone aggregate. All contaminated stone aggregate
shall be removed and replaced with uncontaminated stone aggregate.
(k)
Voids between the fabric and the excavation sides shall be avoided.
(l)
Vertically excavated walls may be difficult to maintain in areas
where soil moisture is high or where soft cohesive or conhesionless
soils are dominant. These conditions may require laying back of the
side slopes to maintain stability. Over excavation areas shall be
replaced with AASHTO No. 57 aggregate, as directed by the Township
Engineer.
(m)
PVC distribution pipes shall be SDR 35 meeting the requirements
of ASTM D3034. Perforations shall be 3/8 inch in diameter. A perforated
pipe shall be provided only within the infiltration trench and shall
terminate one foot short of the infiltration trench wall. The end
of the PVC pipe shall be capped. Pipe shall be oriented with perforations
down.
(n)
The observation well is to consist of six-inch-diameter perforated
PVC with a cap set six inches above ground level and is to be located
near the longitudinal center of the infiltration trench. The pipe
shall have a plastic collar with ribs to prevent rotation when removing
the cap. The screw top lid shall be a cleanout with a locking mechanism
or special bolt to discourage vandalism. The depth to invert shall
be marked on the lid. The pipe shall be placed vertically within the
gravel portion of the infiltration trench and a cap provided at the
bottom of the pipe. The bottom of the cap shall rest on the infiltration
trench bottom.
(o)
If a distribution structure is used, the structure shall be precast concrete meeting the requirements of Sections 605 and 714 of PennDOT Publication 408. The distribution structure shall have a manhole frame and cover for access, meeting the requirements of § 21-40D(2) of this Part 2.
(p)
Infiltration trenches shall be constructed in accordance with
the details on Figure SD-17.[8]
[8]
Editor's Note: The Drainage and Stormwater Management (SD) Figures are included as an attachment to this chapter.
All sanitary sewer facilities shall be designed and constructed
in accordance with design standards and specifications of the Millcreek
Township Sewer Authority.
All public water facilities shall be designed and constructed
in accordance with design standards and specifications of the Millcreek
Township Water Authority or the Erie City Water Authority, as applicable.
[Amended 1-3-2017 by Ord.
No. 2017-2]
A.
Concrete sidewalks.
(1)
All sidewalks or pedestrian access routes ("sidewalks") shall be
constructed in accordance with the details on Figure PC-1.[1] Materials and construction shall conform with the requirements
of Section 676 of PennDOT Publication 408. Steel welded wire fabric
(WWF) shall conform to the requirements of Section 709 of PennDOT
Publication 408. All aspects of sidewalks, including slopes, transitions,
level landings and accessibility ramps, shall conform to current federal
and state guidelines and regulations, including the standards and
regulations under the Americans with Disabilities Act and the Proposed
Accessibility Guidelines for Pedestrian Facilities in the Public Right-of-Way
dated July 2011, as most currently amended.
[1]
Editor's Note: The Pedestrian Circulation (PC) Figures are included as an attachment to this chapter.
(2)
Sidewalks in areas not subject to vehicular traffic shall be a minimum
of four inches thick, unreinforced. Newly constructed sidewalks in
these areas shall be a minimum of five feet wide. All repairs to existing
sidewalks in these areas shall be at a width consistent with the adjoining
portions of the sidewalk, except that where the adjoining sidewalk
is less than four feet, the repaired portion shall be a minimum width
of four feet.
(3)
Sidewalks in areas subject to vehicular traffic, including driveways,
shall be a minimum of six inches thick and shall be reinforced with
6 x 6 - W2.9 by W2.9 WWF (six-gage) reinforcing; provided, that sidewalks
in such areas which are subject solely to one-family or two-family
residential dwelling unit traffic shall be a minimum of four inches
thick and so reinforced. Sidewalks in these areas shall be a minimum
of four feet wide.
(4)
Sidewalks shall be constructed with a maximum cross slope of 2%,
with any cross slope angled toward the center of the street.
(5)
Where ramps or blended transitions are required, sidewalks shall
extend to the ramp or blended transition, and such ramp or blended
transition shall be installed and shall be compliant with Proposed
Accessibility Guidelines for Pedestrian Facilities in the Public Right-of-Way
dated July 2011, as most currently amended.
(6)
Grade ("running slope") of sidewalk. Where sidewalks are contained
within a street or highway right-of-way, the grade of the sidewalk
shall follow the general grade of the adjacent street or highway and
shall be at such an elevation as to create a maximum slope from the
edge of the walk to the top of the curb or the edge of the street
pavement, as the case may be, of 3/4 inch per foot and a minimum slope
for the same location of 1/4 inch per foot. Where sidewalks are not
contained within a street or highway right-of-way, the grade of the
sidewalk shall be 5% maximum.
(7)
Location of sidewalk.
(a)
For a fifty-foot right-of-way, the back of the sidewalk shall
be six inches toward the center of the road from the property line.
(b)
For a sixty-foot right-of-way, the back of the sidewalk shall
be six inches to two feet from the property line. Unless prior approval
is granted to the Township, all walks within a block shall be located
the same distance from the property line. The first walk laid in a
block shall govern the location of all walks in that block.
(c)
For an eighty-foot right-of-way, the back of the walk shall be located at any point between two and four feet from the property line. The same provision for consistency within a block as noted in Subsection A(2) above shall apply.
(d)
The property owner shall be responsible for the proper location,
elevation and grade of the sidewalk.
B.
Biking paths.
(1)
All biking paths shall be constructed in accordance with the details
on Figure PC-2. Thickness of compacted base, concrete and asphalt
as shown on Figure PC-2 are minimums authorized.
(a)
Materials and construction for concrete biking paths shall conform with the requirements for sidewalks as set forth in Subsection A.
(b)
Materials and construction for asphalt biking paths shall conform with requirements of § 29-39E as to the bituminous wear course (the minimum depths of each being as set forth on Figure PC-2).
(c)
Base materials and thickness shown on Figure PC-2 are indicated
at minimum depths, compacted. Where poor subsoil conditions exist,
the Township may require greater compacted base depth. Soil separator
fabric for the specific path type must be installed, in accordance
with PennDOT Publication 408, unless the Township approves an alternative.
(2)
Paths in areas subject to vehicular traffic, including driveways, shall be of greater thickness, concrete paths meeting standards in § 29-43A(3) and the minimum wearing course of an asphalt path being increased to 1.5 inches.
(3)
The width of the path surface may vary depending upon the type of use to be accommodated, but in no instance shall the width be less than five feet. Where a path is intended to accommodate both pedestrians and bicyclists, the path width shall be not less than 10 feet and shall comply with the other requirements of Subsection A pertaining to pedestrian access routes.
(4)
In addition to the path's concrete or paved width, shoulders at least
two feet in width shall be provided on both sides of the path, and
there shall be a five-foot area on both sides of the path which is
clear of all obstructions.
(5)
Paths shall have a vertical clearance of not less than 10 feet.
(6)
Paths shall conform to current federal and state guidelines and regulations,
including any applicable standards and regulations under the Americans
with Disabilities Act.
A.
Within the Township right-of-way, minimum use driveways shall be
constructed in accordance with the details on Figure ST-13 and PC-4.
Design and construction details of higher use driveways shall be submitted
to the Township Engineer for review.
B.
Materials and construction for driveways within the Township right-of-way
shall conform with the following sections of PennDOT Publication 408:
A.
Double concrete monuments shall be set at all intersections, points
of curve and points of tangent, and shall be required on rear subdivision
lines. The top monument shall be constructed of concrete meeting the
requirements of Section 704 of PennDOT Publication 408 for Class A.
The monument shall be at least 30 inches long and shall have a cross-sectional
area of at least 36 square inches. A steel rod with a diameter of
1/2 inch shall extend through the center of the monument for its entire
length. The steel rod shall project 1/2 inch above the top of the
concrete. The monument will be set with the top just flush with or
just below the ground immediately surrounding. The top of the lower
monument shall be set at least four inches below the bottom of the
top monument. The lower monument shall be similar in cross section
to the top monument but shall be at least six inches long. The lower
monument will be set so that if the top monument is disturbed or destroyed,
the lower monument will remain in place. Double monuments shall be
labeled as such on the final plan.
B.
Concrete monuments located within streets, driveways, parking lots
or other improved areas shall be protected at the surface with a cast
iron frame and cover. The casting shall be "City of Erie Standard"
landmark frame and cover as manufactured by Allegheny Foundry Co.,
or approved equal.
C.
Monuments located in streets shall be placed prior to placement of
wearing course.
D.
Monuments and markers shall be as shown on the details of Figure
MM-1.
These regulations shall govern whenever trees are placed, maintained
or replaced within the right-of-way of a public street.
A.
Spacing and location.
(1)
Shade trees intended to grow to 35 feet in height or greater: minimum
spacing of 30 feet and maximum spacing of 60 feet (see Figure STT-1).[1]
[1]
Editor's Note: The Street Tree (STT) Figures are included as an attachment to this chapter.
(2)
As an alternative, ornamental trees intended to grow to less than
35 feet in height: minimum spacing of 20 feet and maximum spacing
of 30 feet.
(3)
As an option if approved by the Board of Supervisors and subject
to approval of a final planting layout, street trees may be clustered
at the corner of the property line and right-of-way, provided that
the required density is satisfied and site lines and lighting are
considered in the layout (see Figure STT-2).
(4)
Street trees should be located between the sidewalk and the paved
cartway of a street in the "tree lawn," provided that trees shall
not be placed in swales or berm areas beside noncurbed streets.
B.
Branching standards.
(1)
Street tree branching shall not interfere with clear sight triangles.
At intersections, trees shall be located so that their foliage is
no closer than 35 feet from the intersection of the streets' right-of-way
as measured from a height of two feet to six feet (see Figure STT-3).[2]
[2]
Editor's Note: The Street Tree (STT) Figures are included as an attachment to this chapter.
(2)
Typical branching of street trees shall not be within eight feet
of ground level after 10 years (see Figure STT-3).
(3)
Plantings shall not interfere with clear visibility to pedestrians
or with free passage on sidewalks and trails. A three-foot clear zone
shall be maintained from a height of three feet to eight feet (see
Figure STT-3).
C.
Tree quality control.
(1)
Trees shall be nursery-grown in a climate similar to that of the
locality of the project. Varieties of trees shall be subject to approval
of the Board of Supervisors.
(2)
All trees shall have a normal habit of growth and shall be sound,
healthy and vigorous. They shall be free from disease, insects, insect
eggs and larvae.
(3)
The trunk diameter of all trees, measured at a height of six inches
above finish grade, shall be a minimum of two inches in caliper.
(4)
Requirements for the measurements, branching, grading, quality, balling
and burlapping of trees shall follow the code of standards recommended
by the American Association of Nurserymen, Inc., in the American Standard
for Nursery Stock, current edition.
D.
Tree selection.
(1)
Street trees shall be of a type which will comply with standards
of this section, whose root structure is not such as will cause damage
to paved streets and/or sidewalks, which are hardy to the local climate
and which do not have invasive characteristics.
(2)
Street trees shall be selected from those recommended from Street
Tree Fact Sheets published by the Municipal Tree Restoration Program
or the Directory of Landscape Tree Cultivars Project, School of Forest
Resources, Pennsylvania State University (1993 or current edition).
Unless deleted from said sources' current editions, suitable tree
species shall include:
|
Species
|
Common Name
| |
|---|---|---|
|
Acer rubrum
|
Red maple
| |
|
Acer rubrum "Red Sunset"
|
Red Sunset maple
| |
|
Acer freemanii "Autumn Flame"
|
Autumn Flame
| |
|
Acer freemanii "Celebration"
|
Celebration maple
| |
|
Fraxinus americana "Autumn Purple"
|
Autumn Purple ash
| |
|
Fraxinus pennsylvanica "Summit Ash"
|
Summit Ash
| |
|
Gleditsia tricanthos inermis
|
Sunburst honeylocust
| |
|
Tilia cordata
|
Littleleaf linden
| |
|
Zelcova serrata "Green Vase"
|
Green Vase zelkova
|
(3)
Other tree species may be used, subject to Township approval, provided that information acceptable to the Township is provided which indicates that the species would comply with standards of this § 29-46.
(4)
Trees which are known to have invasive characteristics which may
escape and spread are to be avoided. No trees included on the list
of "Invasive Plants of Pennsylvania" published by the Department of
Conservation and Natural Resources (current edition) are authorized.
(5)
Among others, the following species of trees are prohibited (those
marked with an asterisk having cultivars not known to be invasive):
|
Species
|
Common Name
| |
|---|---|---|
|
Acer platanoides
|
Norway maple*
| |
|
Acer pseudoplantanus
|
Sycamore maple
| |
|
Ailanthus altissima
|
Tree-of-heaven
| |
|
Paulownia tomentosa
|
Empress tree
| |
|
Pyrus calleryana
|
Callery pear*
| |
|
Ulmus pumila
|
Siberian elm
|
E.
Tree planting implementation.
(1)
All planting shall be performed in conformity with good nursery and
landscape practices and to the standards established in this section.
(2)
Planting shall be completed during normal planting seasons of the
community.
(3)
Street trees are to be maintained and guaranteed for a minimum of
one year after completion of planting. If, during the guarantee period,
more than 1/3 of the tree dies, the tree shall be replaced. Replacement
trees shall conform to all requirements of this section and shall
be maintained and guaranteed for a minimum of two planting seasons.
(4)
Excavation. The planting pit shall be excavated so that the bottom
of the root ball of the tree will be six inches above the undisturbed
soil and the top is approximately three inches to four inches above
finished grade. Excavate with sides vertical and scarified and with
the bottom flat. The planting pit should be over-excavated to allow
for 18 inches of loose topsoil on either side of the root ball (see
Figure LD-1).[3]
[3]
Editor's Note: The Landscape Planting Details (LD) Figures are included as an attachment to this chapter.
(5)
Backfill. Backfill with native or imported soil that matches the
characteristics of the indigenous soil. Imported soil must be free
of rocks larger than two inches in diameter and of clay, toxic matter,
plants, weeds, roots and/or any other debris deemed disadvantageous
to proper plant growth (see Figure LD-1).
(6)
Planting. Planting standards generally are as set forth in Figure
LD-1 and also include:
(a)
A six-inch layer of planting soil shall be placed and compacted
in the bottom of the planting pit.
(b)
After plant is set in planting pit, retain burlap on the root
ball but pull away from the main stem of the plant.
(c)
Place backfill in layers four inches to six inches thick and
work each layer by hand to compact the backfill and eliminate voids.
Ensure that the plant is plumb.
(d)
Once backfill is approximately 2/3 complete, saturate with water
and repeat until no more can be absorbed. Remainder of backfill should
then be placed and compacted and watered again.
(e)
Form a watering saucer around the trunk, and mulch with two
inches to three inches of double-hammered aged bark mulch.
(f)
Bark mulch should not be placed against base of tree trunk.
(7)
Pruning. Dead or broken branches are to be removed. The tree should
be pruned to encourage natural growth consistent with the species
planted.
(8)
Staking and guying. Hardwood stakes shall be driven into firm soil
outside of the planting pit, using #12 double-stranded wire with a
length of rubber hose to ensure protection of the tree trunk. The
wire is to be tightened by wrapping it around a stake (see Figure
LD-1).[4]
[4]
Editor's Note: The Landscape Planting Details (LD) Figures are included as an attachment to this chapter.
A.
Traffic signs. All required traffic signs shall meet the requirements
of PennDOT Publication 236M for Type 3 signs.
B.
Street marker signs.
(1)
Two street markers shall be erected at each intersection of two or
more streets.
(2)
The streets signs shall be of corrosion-resistant aluminum and shall
measure approximately 22 inches by four inches. They shall have four-inch-high
Scotchlite™ white letters on green background. The signs shall be furnished
from a Township-approved source complete with aluminum caps and rustproof
fittings necessary for erection.
(3)
The complete marker shall be four-way and shall consist of two double-face
signs mounted on a two-inch galvanized pipe set in a concrete base.
(4)
The pipe standard shall extend 10 feet out of the ground and at least
two feet into the concrete base. The concrete base shall be a minimum
of 15 inches in diameter and shall extend a minimum of two feet deep
in the ground.
A.
Figures referenced in this article and which follow in this section are hereby incorporated into this Part 2, and shall have full legal effect as though stated in text form.
B.
The Board of Supervisors by ordinance shall be authorized to amend,
add or delete figures.
C.
List of figures.[1]
|
Title
|
Figure No.
| |
|---|---|---|
|
Streets (ST)
| ||
|
Typical Street Cross-Sections 80-foot ROW
|
ST-1
| |
|
Typical Street Cross-Sections 60-foot ROW
|
ST-2
| |
|
Typical Street Cross-Sections 50-foot ROW
|
ST-3
| |
|
Typical and Offset Cul-de-Sac (Curb)
|
ST-4
| |
|
Typical and Offset Cul-de-Sac (Swale)
|
ST-5
| |
|
Pavement Section
|
ST-6
| |
|
Plain Concrete Curb Detail
|
ST-7
| |
|
Mountable Curb Detail
|
ST-8
| |
|
Underdrain and Blind Drain Details
|
ST-9
| |
|
Boulevard Detail
|
ST-10
| |
|
Pavement Restoration Details
|
ST-11
| |
|
Paving Notch Detail
|
ST-12
| |
|
Street Intersections and Driveways
|
ST-13
| |
|
Drainage and Stormwater Management (SD)
| ||
|
Storm Sewer Bedding and Backfill
|
SD-1
| |
|
Typical Layout for Storm Sewers and Inlets
|
SD-2
| |
|
Storm Inlet Details - 2x3/3x3
|
SD-3
| |
|
PennDOT Type M Inlet
|
SD-4
| |
|
PennDOT Type C Inlet
|
SD-5
| |
|
Collection System for Sump, Footer and Roof Drains
|
SD-6
| |
|
Bicycle Safe Grate Detail
|
SD-7
| |
|
Storm Sewer Manhole Detail
|
SD-8
| |
|
Sump and Downspout Connection Details
|
SD-9
| |
|
Typical Detention Basin Details
|
SD-10
| |
|
Low-Flow Channel Details
|
SD-11
| |
|
Typical Outlet Control Structure
|
SD-12
| |
|
Riprap Overflow Spillway
|
SD-13
| |
|
Type D-W Endwall/Headwall
|
SD-14
| |
|
Pipe Outfall Protection To Channel
|
SD-15
| |
|
Pipe Outfall Protection - Unconfined
|
SD-16
| |
|
Infiltration Trench
|
SD-17
| |
|
Typical Dry Well Cross-Section
|
SD-18
| |
|
Pedestrian Circulation (PC)
| ||
|
Sidewalk Details
|
PC-1
| |
|
Pavement and Path/Pathway Details
|
PC-2
| |
|
Subdivision Pathway Connections
|
PC-3
| |
|
Driveway Details
|
PC-4
| |
|
Sample Trail Details
|
PC-5
| |
|
Monuments and Markers (MM)
| ||
|
Concrete Monuments and Covers
|
MM-1
| |
|
Street Tree (STT)
| ||
|
Regular Tree Spacing 60' Max On-Center
|
STT-1
| |
|
Regular Tree Grouping
|
STT-2
| |
|
Typical Subdivision Entrance Planting
|
STT-3
| |
|
Landscape Planting Details (LD)
| ||
|
Tree Planting Detail
|
LD-1
|
[1]
Editor's Note: The figures are included as attachments to this chapter.
