CASE STUDY

Enhancing Houston’s Greenspace through Nature-Immersive Experiences

PROJECT: Greens Bayou
CLIENT: The Houston Parks Board
LOCATION: Houston, TX

As part of the Bayou Greenways 2020 initiative, Clark Condon designed a “ribbon through the woods” to create an educational, recreational, and immersive experience into nature within the fourth largest city in the U.S.

CASE STUDY

Enhancing Houston’s Greenspace through Nature-Immersive Experiences

PROJECT: Greens Bayou
CLIENT: The Houston Parks Board
LOCATION: Houston, TX

As part of the Bayou Greenways 2020 initiative, Clark Condon designed a “ribbon through the woods” to create an educational, recreational, and immersive experience into nature within the fourth largest city in the U.S.

The Scene

Bayou Greenways 2020, a $220 million public-private effort, distributes parkland equitably to neighborhoods throughout Houston while linking neighborhoods to each other. Through this program, Greens Bayou, a naturalized waterway, has greatly improved accessibility and connectivity to parks in an underserved and fragmented area of Houston. This includes access to Halls Bayou Greenway and the City of Houston’s Brock Adventure Park, a former under-utilized golf course that was reimagined into more than 300 acres of greenspace for the community.

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The Project

A study was initially conducted to identify ways to improve connectivity to public facilities, residential neighborhoods, and parkland to expand accessibility in the region. From the study, a 10-mile trail system with linear parks was developed to include paved running and biking trails, informal nature trails, kayak launch access, pedestrian bridges, increased forest cover, and restoration of understory ecosystems. Greens Bayou focuses on providing access to publicly owned natural areas that were previously inaccessible through a partnership between the City of Houston and the Houston Parks Board.

By installing a 460-linear foot bridge, one of the Greens Bayou trail segments connected the north and south sides of Brock Park across Halls Bayou. An 8’ wide concrete trail connects to the bridge and winds through a mature forest. Limiting disturbance to the existing tree canopy and hydrologic patterns required extensive study, field investigation, and monitoring through construction. Historic stabilization attempts and relic bridge footings along Greens Bayou created hazards for kayakers within the bayou. A new kayak launch was strategically located to avoid these hazards and provide a safe accessible path to the water. The natural surface trails provide a unique character compared to other segments of the Bayou 2020 Greenway System. In an effort to protect the existing habitat, a less invasive system of trails were installed where appropriate for the site conditions. Design elements to highlight the natural beauty of the site, including custom metalwork reflects the flora and fauna. Corten panels featuring herons nestle into the trailheads and mirror the flights of the birds found along the bayou. Lime green artistic pine needles punctuate the landscape and serve as artistic bollards and signature landmarks for trail users. Each of these custom elements reflects the surrounding environment and provides a memorable identity for this trail segment.

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The process

The trail alignment focused on minimizing the removal of existing trees and protecting the existing hydrologic functions of the site. Although the grade appeared flat in a visual inspection, water gently moved across the site to the bayous. Providing a system of shallow swales and trench drains provided outlets for the water to move around the newly installed trail and not disrupt the historic water patterns of the site. Extensive root pruning and the protection of historic water movement ensured the health of the existing forest was protected. During design, the project team explored alternatives to limit the potential impacts from heavy construction traffic, including the 18-wheelers necessary to bring the bridge segments and cranes to the proposed bridge location. The final documents included a narrow construction corridor with strategically located truck turn arounds to minimize the removal of large trees, and a temporary low water crossing was installed across Halls Bayou to prevent 18-wheelers from driving through the forest on the north side of the bayou. In addition to replacing trees removed by construction, the restoration process also included the removal of invasive species along the trail corridor. The seeding of native grasses and wildflowers, combined with the installation of woody trees and shrubs, increased plant diversity and ultimately improved the habitat. From design through construction, all parties ensured the project minimized disturbance and protected this valuable landscape.

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The result

The Greens Bayou trail system improved access through Brock Park and connects to Halls Bayou. Adjacent to Brock Park is a 120-acre parcel owned by the Houston Parks Board. The proximity of the park, and this parcel, protects vital undeveloped land within the 100-year floodplain. The trail systems in this region respect this frequently flooded environment and the natural hydrologic functions. The trail woven into this natural ecosystem provides users with an immersive experience. Unlike other bayou corridors, the Halls and Greens Bayou are un-channelized and provide a glimpse into how a bayou would have functioned before the settlement of Houston. Through the integration of interpretive signage, the trail users have a unique opportunity to experience and understand the ecosystem functions occurring around them.

Through the protection of the existing ecosystem, the project maintains the current natural functions of the site. This project is an example of protecting land within the 100-year floodplain from development to serve as a buffer during flood events for adjacent communities. This is an example of one of the segments of trail already completed along Greens Bayou, which, when fully implemented, will provide a continuous trail network extending from Brock Park to Thomas Bell Foster Park.

Studies completed on the Bayou Greenways Initiative revealed that the system will equate to $50 million in mental and physical health benefits. This segment of the greenway is one piece of this system, contributing to the improved health of Houstonians.

 

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