November
2005 BID LIST Answering the Drainage Challenge by Kirk Landers, V.P./Editorial Director
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Here’s the latest
in drainage equipment — from filters to porous pavement.
Porous
paving on road shoulders can mitigate some of the stormwater effects of
the asphalt or concrete road, allowing rainwater to percolate through
the surface and back into the ground where the water is cleaned and
returned to groundwater supplies. This reduces runoff volumes and rates
and provides erosion and sediment control. Invisible Structures
manufactures two such porous pavers — Grasspave2 and Gravelpave2.
Grasspave2 is a structural support system with
100% grass coverage and boasts a 60-year lifespan. Gravelpave2 (above)
keeps an area natural looking by supporting any type of hard, decorative
gravel and preventing compaction. Its lifespan is 25 years.
The
newest addition to Con/Span’s family of stormwater products, the
Stormvault Mitigation System, is a below grade detention and
sedimentation vault designed to treat a volume of stormwater runoff to
the Maximum Extent Practicable. The system meets the full intent of the
NPDES Phase II pollutant removal requirements.
The
ADS Water Quality Unit is designed to release a typical first flush
discharge and redirect any excess flow to a bypass piping system
installed with the unit. Available in 36- through 60-inch diameters,
the units are modified sections of N12 pipe and are installed the same
as large-diameter flexible pipe. It can be installed at any point in the
subsurface drainage system and is ideally suited to treat hot spots in
existing stormwater lines.
The unit has two 24-inch-diameter inspection and
access ports, one for the sediment chamber and one for the oil chamber.
Clean out is easily performed through these access ports with the use of
a vacuum pump and should be done at least once a year based on
contaminant loads.
EnviroSafe, the modular stormwater catch basin
filter system from Transpo, is designed to capture and retain the many
pollutants associated with stormwater runoff. The system can be
retrofitted to fit flat-grated and combination curb-grated catch basins
and provides ample storage for sediment. The hooded bypass feature
eliminates flooding potential during large storms, while still retaining
sediment and debris captured during the event.
Features include lightweight, low-cost filter
packs that snap in and out easily; large storage capacity; a pre-filter
to keep out coarse sediments and reduce clogs; UV-safe plastic copolymer
with adjustable alloy frame; and a configurable filter pack that can be
optimized for bacteria, oil/grease, heavy metals, toxic chemicals,
sediment, and more. The system is available in rectangular or circular
configurations.
The
Storm Pure catch basin insert is a two-stage unit from Nyloplast Inc., a
division of Advanced Drainage Systems, that provides a high level of
on-site stormwater treatment. The upper stage consists of a
perforated-metal, coned catch basket covered by a geotextile filter bag
that captures sediment and debris while allowing filtered water to pass
freely through. The lower stage contains a patented Mycelx filter insert
that attracts and holds tiny particles of hydrocarbons and oil-bound
pollutants. The filter contains a specially treated absorbent material
that instantly bonds with contaminant particles resulting in a 95%
removal rate of total petroleum hydrocarbons.
Both stages are housed in a corrosion-resistant,
high-density polyethylene body with overflow slots that act as a bypass
in unusually high-flow events. The complete assembly will pass 230
gallons per minute without bypassing the flow. The insert fits readily
into a standard 24-inch Nyloplast catch basin, including curb inlets and
road/highway basins.
The
Precision 2000 asphalt/concrete cutter from American Highway Products
eliminates jackhammers and compressors used to remove utility castings
such as manholes from roads. The heavy-duty mobile machine cuts a
perfect circular hole in one motion and does not destroy the surrounding
road and compaction. Round cuts reduce the amount of material removed by
over 21% compared to square cuts and eliminates corner cuts. The machine
makes up to 60 cuts in an 8-hour day — an average of 2 inches per
minute. One blade can make up to 400 holes in asphalt or 300 holes in
reinforced concrete and asphalt.
The patented Silt-Saver stormwater filter
consists of a frame and filter made to accommodate drainage structures
up to 60 inches in diameter. The frame, available in a round or square
base, is constructed of partially recycled, high molecular weight,
high-density polyethylene copolymer. Super stress-crack resistance is
combined with high-impact strength and rigidity. The filter is designed
to custom fit each frame and is constructed of non-woven polyester,
needle punched, and heat-set to provide durability. This material
provides consistent and continuous filtration under everyday jobsite
conditions, according to the company.
Hancor’s EcoFirst HDPE pipe is a dual-wall,
high-density, polyethylene pipe made with a minimum 50% recycled
polyethylene material content. The pipe features long-term service life
and hydraulic capacity, the rolled-rim bell, and fast bell-and-spigot
joint assembly with proven structural integrity. It is available in a
60-inch diameter, in lengths of 20 or 30 feet, and carries a 5-year
warranty.
EcoFirst has achieved certification through
Hauser Laboratories’ Green Performance program ensuring that the
delivered product quality is consistent with the manufacturer’s claim.
The environmentally friendly product helps architects, engineers, and
developers acquire LEED Certification Credits for recycled building
materials.
Natural Site Solutions, LLC
Construction water purification
Bridge and road construction managers are
finding it more and more difficult to meet local and state turbidity
standards when discharging stormwater runoff to streams, lakes, and
rivers from their construction sites. One innovative technology
developed by Natural Site Solutions is the Chitosan-Enhanced Sand
Filtration. Derived from waste crab and shrimp shells, chitosan becomes
bound to the sediment particles and then can be completely captured in a
sand filter so that only clear, pure water is left which can be legally
discharged directly to surface water. This technology can handle flows
to 5,000 gallons per minute while meeting the most stringent turbidity
standards.
Crumpler Plastic Pipe’s pipes and culverts range
in size from 3 to 48 inches in diameter. The H-20 traffic loading
performance of their larger culvert sizes has opened up applications for
the entire product line in roadway drainage uses. The single-wall and
Dual Wall Smooth Core/n-10 pipes are resistant to the combined effects
of sand, gravel, sediment abrasion, and consequent effects of corrosion.
Crumpler also offers a variety of specialty fittings that are required
in the construction of subsurface culvert drain systems.
Curlex Sediment Logs from American Excelsior are
versatile, effective solutions to erosion and sediment control. They
consist of engineered, curled Aspen excelsior fibers encased in flexible
tubular netting and have been used successfully across channel bottoms,
as slope interruption devices, and for inlet protection. In
installations around inlets, the logs allow water to flow through while
sediments are kept out. The logs are available in 6-, 9-, 12-, and
20-inch diameters and various lengths and densities to meet project
requirements.
Cultec, Inc.
Stormwater retention/detention chambers
Cultec’s Recharger 150 stormwater
retention/detention chambers are designed to save materials and labor
during installation. A longer 8.5-foot length allows project managers to
order fewer units to complete projects. The new chamber features a
built-in endwall for strength; a patented overlapping rib connection for
easy installation and a strong connection; and high-density polyethylene
construction for greater chemical resistance. The chamber is 18.5-inches
high, 33-inches wide, and has a 2.65-cubic feet per linear foot storage
capacity. Each chamber holds approximately 260 gallons.
Sealing Systems, Inc.
Erosion control for drainage
Sealing
Systems’ Infi-Shield External Seal provides erosion contol and prevents
infiltration in manholes and catch basin inlets. Infi-Shield is made of
a high-quality EPDM rubber and is bonded using non-hardening butyl
mastic with excellent adhesion properties. The seal is one continuous
band that externally seals the grade adjustment ring area and joint
sections in catch basins. The external seal is able to fit any shaped
structure and installs easily in minutes without any special tools.
Kristar
Enterprises’ SwaleGard is a self-containted pre-filter designed to
collect sediment, debris, and petroleum hydrocarbons from stormwater
runoff prior to a vegetated swale or bio-retention area and may also be
used to filter runoff through a parkway culvert. The working chamber is
made of durable geotextile fabric that is easily replaced and provides
for flexibility, ease of maintenance, and economy. The SwaleGard
performs as an effective filtering device at low flows and, because of
the built-in high-flow bypass, will not impede the system’s maximum
design flow.
East
Jordan Iron Works has a wide range of cast iron catch basins, grates,
and inlet covers permanently cast with a trout emblem and the “Dump No
Waste, Drains To Waterways” message. These environmentally friendly
castings serve as an enduring directive and are an effective, low-cost
means to discourage illicit dumping. Existing standards can be
customized with appropriate messages and images.
The Ultra-Urban Filter with Smart Sponge,
manufactured by AbTech Industries, is an innovative low-cost filter that
helps meet NPDES requirements with effective filtration, efficient
application, and moderate maintenance. It absorbs oil and grease and
captures trash and sediment from stormwater runoff before it can enter
the storm drain system. The filter is made of a high-strength corrugated
recycled content plastic and comes in two standard designs: a modular
unit geared toward curb inlet openings and a single unit designed for
typical drop-in catch basin drains.
ACO’s modular polymer concrete trench drain
systems capture water runoff and transport it to nearby catch basins
where it can be managed in a controlled manner, treated (if necessary),
and transported to culverts, streams, or floodways, or used for nearby
landscape irrigation. The drains are available in a variety of sizes and
load-class capabilities, as well as customized for unusual applications.
Pacific Corrugated Pipe’s TriShield steel-ribbed
polyethylene pipe is a state-of-the-art composite pipe product that
combines smooth wall hydraulics and the structural strength of steel
with the corrosion and abrasion resistance of high-performance
engineered polyethylenes. The pipe is tough and durable and is available
in sizes from 20 through 102 inches in diameter and in 12- to 16-gauge
thicknesses. TriShield was recently selected as the drainage pipe of
choice in a large design-build project in southeast San Diego County,
California.
The
Curb Inlet StormFilter from Stormwater 360 is a low drop-point-of-entry
treatment configuration for small- to medium-size sites where the
structure should be placed outside the roadway. It used the drop from
the curb inlet to the conveyance pipe to drive the passive filtration
cartridges. An internal, high-flow bypass isolates accumulated
pollutants in the treatment chamber from high flows. The three-in-one
design (curb inlet, high-flow bypass, and storm filter) reduces costs
and simplifies the overall site design by eliminating two structures.
Porous
paving on road shoulders can mitigate some of the stormwater effects of
the asphalt or concrete road, allowing rainwater to percolate through
the surface and back into the ground where the water is cleaned and
returned to groundwater supplies. This reduces runoff volumes and rates
and provides erosion and sediment control. Invisible Structures
manufactures two such porous pavers — Grasspave2 and Gravelpave2.
The
newest addition to Con/Span’s family of stormwater products, the
Stormvault Mitigation System, is a below grade detention and
sedimentation vault designed to treat a volume of stormwater runoff to
the Maximum Extent Practicable. The system meets the full intent of the
NPDES Phase II pollutant removal requirements.
The
ADS Water Quality Unit is designed to release a typical first flush
discharge and redirect any excess flow to a bypass piping system
installed with the unit. Available in 36- through 60-inch diameters,
the units are modified sections of N12 pipe and are installed the same
as large-diameter flexible pipe. It can be installed at any point in the
subsurface drainage system and is ideally suited to treat hot spots in
existing stormwater lines.
EnviroSafe, the modular stormwater catch basin
filter system from Transpo, is designed to capture and retain the many
pollutants associated with stormwater runoff. The system can be
retrofitted to fit flat-grated and combination curb-grated catch basins
and provides ample storage for sediment. The hooded bypass feature
eliminates flooding potential during large storms, while still retaining
sediment and debris captured during the event.
The
Storm Pure catch basin insert is a two-stage unit from Nyloplast Inc., a
division of Advanced Drainage Systems, that provides a high level of
on-site stormwater treatment. The upper stage consists of a
perforated-metal, coned catch basket covered by a geotextile filter bag
that captures sediment and debris while allowing filtered water to pass
freely through. The lower stage contains a patented Mycelx filter insert
that attracts and holds tiny particles of hydrocarbons and oil-bound
pollutants. The filter contains a specially treated absorbent material
that instantly bonds with contaminant particles resulting in a 95%
removal rate of total petroleum hydrocarbons.
The
Precision 2000 asphalt/concrete cutter from American Highway Products
eliminates jackhammers and compressors used to remove utility castings
such as manholes from roads. The heavy-duty mobile machine cuts a
perfect circular hole in one motion and does not destroy the surrounding
road and compaction. Round cuts reduce the amount of material removed by
over 21% compared to square cuts and eliminates corner cuts. The machine
makes up to 60 cuts in an 8-hour day — an average of 2 inches per
minute. One blade can make up to 400 holes in asphalt or 300 holes in
reinforced concrete and asphalt.
The patented Silt-Saver stormwater filter
consists of a frame and filter made to accommodate drainage structures
up to 60 inches in diameter. The frame, available in a round or square
base, is constructed of partially recycled, high molecular weight,
high-density polyethylene copolymer. Super stress-crack resistance is
combined with high-impact strength and rigidity. The filter is designed
to custom fit each frame and is constructed of non-woven polyester,
needle punched, and heat-set to provide durability. This material
provides consistent and continuous filtration under everyday jobsite
conditions, according to the company.
Hancor’s EcoFirst HDPE pipe is a dual-wall,
high-density, polyethylene pipe made with a minimum 50% recycled
polyethylene material content. The pipe features long-term service life
and hydraulic capacity, the rolled-rim bell, and fast bell-and-spigot
joint assembly with proven structural integrity. It is available in a
60-inch diameter, in lengths of 20 or 30 feet, and carries a 5-year
warranty.
Crumpler Plastic Pipe’s pipes and culverts range
in size from 3 to 48 inches in diameter. The H-20 traffic loading
performance of their larger culvert sizes has opened up applications for
the entire product line in roadway drainage uses. The single-wall and
Dual Wall Smooth Core/n-10 pipes are resistant to the combined effects
of sand, gravel, sediment abrasion, and consequent effects of corrosion.
Crumpler also offers a variety of specialty fittings that are required
in the construction of subsurface culvert drain systems.
Sealing
Systems’ Infi-Shield External Seal provides erosion contol and prevents
infiltration in manholes and catch basin inlets. Infi-Shield is made of
a high-quality EPDM rubber and is bonded using non-hardening butyl
mastic with excellent adhesion properties. The seal is one continuous
band that externally seals the grade adjustment ring area and joint
sections in catch basins. The external seal is able to fit any shaped
structure and installs easily in minutes without any special tools.
Kristar
Enterprises’ SwaleGard is a self-containted pre-filter designed to
collect sediment, debris, and petroleum hydrocarbons from stormwater
runoff prior to a vegetated swale or bio-retention area and may also be
used to filter runoff through a parkway culvert. The working chamber is
made of durable geotextile fabric that is easily replaced and provides
for flexibility, ease of maintenance, and economy. The SwaleGard
performs as an effective filtering device at low flows and, because of
the built-in high-flow bypass, will not impede the system’s maximum
design flow.
East
Jordan Iron Works has a wide range of cast iron catch basins, grates,
and inlet covers permanently cast with a trout emblem and the “Dump No
Waste, Drains To Waterways” message. These environmentally friendly
castings serve as an enduring directive and are an effective, low-cost
means to discourage illicit dumping. Existing standards can be
customized with appropriate messages and images.
The
Curb Inlet StormFilter from Stormwater 360 is a low drop-point-of-entry
treatment configuration for small- to medium-size sites where the
structure should be placed outside the roadway. It used the drop from
the curb inlet to the conveyance pipe to drive the passive filtration
cartridges. An internal, high-flow bypass isolates accumulated
pollutants in the treatment chamber from high flows. The three-in-one
design (curb inlet, high-flow bypass, and storm filter) reduces costs
and simplifies the overall site design by eliminating two structures.
