Can wood be recycled or reused at the end of its life?

Absolutely. Wood is highly recyclable, and timber from decommissioned bridges can be repurposed for new projects. If not repurposed, wood can biodegrade naturally, unlike steel or concrete, which require energy-intensive processes for disposal.

Discovery Park of America Bridges | Covered & Cantilever by YBC

A Pair of Signature Crossings by York Bridge Concepts in Union City, Tennessee

At Discovery Park of America in Union City, Tennessee—a destination where innovation, culture, and natural landscapes intersect—York Bridge Concepts (YBC) delivered two signature crossing experiences: a classic covered pedestrian bridge and a striking cantilever pedestrian bridge. Together, these timber structures elevate the guest journey across the park’s water features and curated landscapes, blending timeless craftsmanship with modern performance. The pair functions as connective tissue for the campus, offering safe, intuitive, and aesthetically compelling routes while embodying Discovery Park’s mission to inspire curiosity and connection.

Each bridge was conceived and executed through YBC’s Decero™ Design process—our collaborative, concept-to-completion framework—and then brought to life on site via our Deck-Level construction approach. The result is a coordinated duo that expresses two different design languages—one nostalgic and sheltering, the other bold and sculptural—while sharing a common foundation in durability, sustainability, and long-term maintainability.

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Setting & Design Intent

Discovery Park of America is known for immersive exhibits, outdoor installations, and broad sightlines across water, gardens, and greens. Any new structures must respect that visual story, guiding guests without overwhelming the scenery. The covered bridge provides a quiet, contemplative moment--framed views, a gentle acoustical buffer from the surrounding activity, and a timeless silhouette that photographs beautifully in every season. The cantilever bridge, by contrast, is intentionally expressive: a modern timber statement that draws the eye and signals directionality, creating a sense of lift and forward motion as visitors transition between exhibits.

Together they provide two distinct experiences:

Covered Pedestrian Bridge: A classic, human-scaled passage that invites guests to slow down, take in interpretive views, and enjoy cooled shade on warm Tennessee days.
Cantilever Pedestrian Bridge: A graceful, contemporary span with a visually light profile that showcases YBC's structural timber expertise and creates a memorable procession across water or sensitive ground.

Both bridges strengthen wayfinding, enhance campus safety, and add architectural interest, turning circulation into part of the park experience, not just a means of getting from point A to point B.

The Covered Pedestrian Bridge: Classic Craft with Modern Performance

Architecture & Aesthetics

The covered pedestrian bridge is designed as a warm, welcoming corridor in the landscape. Its exterior cladding and roofline establish a recognizable icon, while the interior offers a calm, protected walkway with carefully choreographed daylight. The roof reduces heat gain and glare, improves traction by reducing direct precipitation on walking surfaces, and creates a sense of place that visitors remember.

YBC's Decero™ Studio guided material selections and coatings to harmonize with the park's natural palette. The structure's trim profiles and joinery details--hallmarks of our Legacy Series--express precision and craft, while the overall silhouette nods to Americana vernacular architecture without feeling nostalgic or dated. Every element, from the entry portals to the soffit lines, was tuned to feel comfortable, safe, and camera-ready.

Structure & Materials
At the heart of the covered bridge is a robust timber superstructure engineered for pedestrian live loads and serviceability criteria that prioritize comfort as well as strength. YBC utilizes Southern Yellow Pine (SYP) as a primary structural timber--selected for its strength characteristics, availability, and excellent performance when properly detailed and protected. In high-touch or high-exposure areas, we deploy additional protective strategies such as YBC's premium coating systems, wear surfaces, and hardware specifications designed to resist corrosion and extend service life.

The deck system is engineered to deliver reliable stiffness and excellent footfall comfort, with attention paid to the dynamic behavior typical of pedestrian bridges. Guardrail systems are integrated into the structural rhythm, ensuring code-compliant heights and infill while preserving views and the sense of openness. Where applicable, wire-rope or mesh infill panels can be used to maintain sightlines and meet safety standards without making the space feel enclosed.

Weathering, Drainage & Enclosure
A covered bridge must do more than look good. It must manage water and weather. The roof profile is engineered with proper overhangs, drip edges, and flashing details to shed rainwater away from the deck and structural members. Hidden or architecturally integrated gutters direct water downslope, protecting foot traffic areas and reducing splash-back onto structural elements. Ventilation--both at the ridge and near the eaves--helps the enclosure breathe, dissipating heat and managing humidity under the roof. These strategies, along with YBC's coatings and end-grain protections, contribute to long-term durability in a four-season climate.

Accessibility & User Comfort
From approach ramps to clear deck widths, the covered pedestrian bridge is planned for universal access. The roof creates respite from sun and rain, while lighting can be integrated into the structure to reinforce safety during evening hours and special events. Non-slip walking surfaces and deliberate transitions at thresholds promote comfort for visitors of all ages and abilities.

The Cantilever Pedestrian Bridge: A Contemporary Timber Statement

Design Language & Spatial Experience
Where the covered bridge offers enclosure, the cantilever bridge offers lift. The superstructure reaches outward with a minimal support footprint, creating the visual effect of floating over water or sensitive terrain. This design is especially suited to sites that demand reduced disturbance--wetlands margins, root zones, or areas where habitat connectivity is a priority.

The walking experience emphasizes openness and view. Visitors sense the landscape opening beneath and around them, with handrails and infills thoughtfully detailed to be both secure and visually light. The cantilever geometry also aids wayfinding: its directional thrust naturally points to key destinations, subtly guiding guests without the need for excessive signage.

Structural Timber Execution
Cantilever bridges present unique engineering challenges. YBC's team evaluates longitudinal and transverse stiffness, serviceability under pedestrian live load, wind behavior across open water or fields, and the balance between counterweight and projection. Our structural approach coordinates timber member sizing, connection detailing, and support placement so the cantilever reads as graceful while performing as robust.

To preserve the crispness of the profile, we integrate connections where possible and use hardware finishes that visually recede. Bearing points and abutments are coordinated with site grading and drainage to keep the structure high-performing through seasonal changes. The result is a modern timber landmark that as serious about engineering as it is about aesthetics.

Deck, Rail & Edge Protection
The deck is designed to manage surface water efficiently while providing reliable traction. Handrail systems meet applicable safety criteria without obstructing views, and openings are controlled to ensure guest protection. Where interpretive or donor elements are desired, the cantilever bridge offers natural opportunities at overlooks, landings, or anchorage zone--places where visitors pause and engage with the story of Discovery Park and the broader community.

Discovery Park Museum cantilever bridge with museum in background

Design-Engineer-Build: The YBC Process From Concept to Completion

The Decero™ Design Studio Approach
"Decero," Latin for "from scratch," captures our philosophy: every bridge begins with the project's constraints and opportunities--site hydrology, habitat, soils, anticipated foot traffic, maintenance capacity, and the visual language of the campus. For Discovery Park of America, coordination with the owner's vision was paramount: celebrate nature, enhance learning, and craft an experience guests will want to repeat.

Our process includes:

Discovery & Programming: Understanding circulation patterns, event loads, exhibit adjacencies, and how guests move seasonally and at peak times.
Concept & Iteration: Testing span options, profiles, deck widths, and the relationship between structural rhythm and scenic views.
Detail Development: Selecting coating systems, rail infills, wear surfaces, and hardware that align with longevity goals and operational realities.
Build Planning: Sequencing, access routes, material staging, and environmental protection measures that minimize site impact.

On-Site, Deck-Level Construction
YBC builds bridges on site. We do not rely on prefabricated units that limit design flexibility or force compromises at installation. Our Deck-Level construction approach allows crews to work from the structure itself as it advances, significantly reducing the need for heavy equipment travel within sensitive areas. When piling is needed, we employ a vibratory hammer extension on an excavator to drive pile efficiently and with control. Temporary access mats, silt controls, and construction fencing are planned to protect soils, vegetation, and water quality. This method--in tandem with experienced crews--delivers consistent quality and a lighter environmental footprint.

Environmental Stewardship & Site Sensitivity
Discovery Park's landscape is part of the experience. YBC's environmental lens begins with limiting disturbance and continues through construction and long-term maintenance. Key strategies include:

Minimal Ground Disturbance: Strategic abutment locations, and where needed, discreet intermediate supports set outside sensitive zones.
Hydrology Awareness: Deck camber, drainage path planning, and abutment/approach grading that protect water quality and reduce erosive velocities.
Material Responsibility: Sourcing structural timber responsibly and applying coating systems that extend life, reduce replacement cycles, and lower embodied impacts over time.
Habitat Considerations: Construction timing and noise management, where relevant, reduce disruption to wildlife activity and visitor enjoyment.

Coatings, Wear Surfaces & Long-Term Durability
Performance over decades is a YBC hallmark. Both Discovery Park bridges deploy coating systems calibrated to the exposure conditions. Oil-based and polymer-modified finishes can be used in combination to shield timber fibers from moisture cycling and UV exposure, slowing checking and extending service intervals. At the walking surface, YBC specifies high-traction wear solutions tailored to the microclimate--balancing slip resistance with cleanability and long-term aesthetics.

End-grain sealing, capillary breaks at connection points, and hardware isolation are standard parts of our detailing. Where water management is critical (for instance, at the covered bridge eaves), we incorporate flashing and drips to keep liquid water moving away from timber members. Together, these measures protect the structure from the top down and inside out.

Accessibility, Safety & Guest Comfort
Pedestrian bridges in public spaces must invite all users. Both bridges were planned for accessible approaches, clear path widths, and comfortable slopes. Handrails offer confident grasp where needed, and the rail geometry maintains code-compliant opening limits. Underfoot, the deck boards or planks are oriented and spaced for drainage and traction, with transitions carefully detailed to avoid trip points.

If the owner elects lighting, YBC can integrate low-glare fully shielded fixtures into rails or eaves to preserve night sky quality while improving visibility. On the covered bridge, lighting tucked into the soffit or truss rhythm can create a warm, even wash that's as beautiful as it is practical evening events.

Wayfinding, Interpretation & Placemaking
A bridge is an invitation. YBC coordinated the entry portals, sightlines, and alignment of each bridge with Discovery Park's circulation logic so guests instinctively know where to go. The covered bridge frames views into and out of the structure; the cantilever bridge points the way with its dynamic geometry. Both are natural platforms for interpretive graphics, donor recognition, or educational content tied to the park's mission.

Beyond mere movement, these bridges create places to linger. Subtle widenings at mid-span or landings can become impromptu overlooks. Benches, if desired, may be integrated at structural bays to keep the walking path clear while offering rest points and photo opportunities.

Operations & Maintainability
Public-facing infrastructure must be easy to care for. YBC's detailing choices--coating systems, hardware selections, deck wear solutions, and drainage controls--combine to simplify maintenance and extend refresh cycles. Access for inspections is considered during design; critical connections and bearing points remain visible and reachable. Replacement of high-wear components, should it be required years down the line, is addressed by modular thinking at the component level rather than wholesale reconstruction.

For owners who prefer structured upkeep, YBC's BridgeCare™ programs can be tailored to provide periodic inspections, maintenance recommendations, and planned lifecycle interventions. The goal is to keep the bridges performing and looking their best, year after year, with predictable budgeting and minimal disruption to park operations.

Craftsmanship You Can See--and Feel
What visitors notice immediately is the craftsmanship: the cadence of posts and rails, the alignment of fasteners, the consistent reveals along edges and trim. That visible quality is rooted in the invisible--design coordination, shop drawings, and field leadership that protects quality from the first stake in the ground to the final punch list. YBC crews are timber specialists; it shows in the crispness of cuts, the tightness of joints, and confidence you feel underfoot.

Aerial photograph of the pedestrian cantilever bridge built by York Bridge Concepts in Union City, TN

Why Timber at Discovery Park?

Timber is warm, tactile, and humane. In a cultural landscape like Discovery Park, those qualities matter. Timber's visual connection to nature complements gardens, water, and curated exhibits, inviting visitors to slow down and engage. From a performance perspective, well-detailed timber performs admirably in pedestrian applications , especially when paired with the protective strategies YBC has refined over decades. And as part of a long-term sustainability plan, durable timber structures that are maintained over time can offer compelling lifecycle outcomes.

Partnering with YBC: From Vision to Icon
For Discovery Park of America, YBC didn't deliver two isolated structures--we delivered a pair of experiences that advance the park's mission. The covered pedestrian bridge and the cantilever pedestrian bridge work together to:

Improve safety and circulation for guests of all ages.
Create distinct, memorable moments along key routes.
Respect sensitive site conditions through deck-level, on-site construction.
Reduce long-term ownership costs via durable detailing and maintainability.
Enrich the park's visual identity with bridges that photograph beautifully and feel right at home in every season.

Looking Ahead
Great public places evolve. These bridges were designed with that future in mind--capable of accommodating seasonal crowds, special events, and new interpretive layers as Discovery Park's programming grows. Their materials will acquire a quiet patina, their details will continue to read as careful and crafted, and their role as connectors--both literal and symbolic--will deepen with time.

York Bridge Concepts is proud to have contributed two signature crossings to Discovery Park of America in Union City, Tennessee. The covered pedestrian bridge offers a classic, sheltered passage that celebrates craft and comfort; the cantilever pedestrian bridge delivers a modern, lifted experience that announces itself with clarity and grace. Together, they embody what YBC does best: design-engineer-build timber crossings that perform beautifully, protect the landscape, and become beloved pieces of the places they serve.

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