Tide Pools and Pile Encasement- Brooklyn Bridge Park
Location Brooklyn Bridge Park, NY, USA
Product used: Bio enhancing armoring units
As part of the holistic environmental theme of Brooklyn Bridge Park, two different enhancement projects using ECOncrete® technologies were incorporated into two piers within the park’s renovation plan. At pier 4, ECOncrete® provided precast tide pools which were integrated between the stones comprising the riprap to increase the biological productivity of the newly constructed beach. At Pier 6, ECOncrete® developed an innovative concrete encasements technology applied to restore the required structural properties of the aging wooden piles while increasing the availability of substrate capable of sustaining rich marine communities. At both locations, ECOncrete® exhibited rich and diverse live cover when compared to control units. With the tidepools at pier 4 presenting 89 to 100% live cover and higher biodiversity, in stark contrast to the very poor biological function of the surrounding riprap rock, and at pier 6, ECOncrete®’s encasement presented between 70to 100% live cover and high biodiversity as opposed to only scattered colonization on the control piles.
Coastal and marine infrastructure (CMI), often imposes much stress on fauna and flora of natural habitats. Concrete based CMI, provide poor substrates in terms of biological recruitment due to the combined effects of the concrete’s chemistry, featureless surface texture and high inclination compared to natural habitats. Considering the recent growth of world populations and rural development around coastlines, the effect of CMI on the natural environment is catastrophic.
Brookline Bridge Park, NYC is a popular recreational, environmental and cultural destination enjoyed by many. The Park is a post-industrial 85-acre open space on the Brooklyn side of the East River with a revitalized 1.3-mile (2.1 km) of waterfront. As part of the holistic environmental theme of the park, two different enhancement projects using ECOncrete® technologies were incorporated into the park’s renovation plan. The first project features the integration of precast concrete tide pools as part of a newly constructed riprap beach at Pier 4. The tide pools provide shore stabilization of the beach portion of the new waterfront, as well as increase the ecological performance. The second project features a structural repair of aging pier piles supporting Pier 6. The project utilized ECOncrete®‘s innovative encasement technology based on ecosystem specific concrete mixture and complex design. These physical and chemical alterations create a substrate suitable for valuable habitat and dramatically elevates ecosystem services when compared to standard methods of pile encasement. Standard jackets (Portland-based concrete with traditional
ECOncrete® supplies a range of modular,
ECOncrete®’s tide pools are designed to create well-defined water retaining elements that mimic natural rock pools typical to rocky shores. Even though rock armor is made of natural material, due to its low surface complexity and dense nature, it is not a surrogate to natural rocky marine habitats and often provides limited ecological value to the surrounding environment. ECOncrete®’s designed tide pools add valuable
ECOncrete® Pile Encasement uses an innovative concrete mix that enhances the growth of marine flora and fauna. In addition, textured forms are applied and stripped after casting, imprinting a rough texture onto the surface of the concrete jacket, which helps to further induce rich marine growth. The unique ecological pile encapsulation can be easily substituted for standard concrete pile encapsulation commonly applied to repair timber piles supporting piers.
Nine months after installation (August of 2014), and after a long harsh winter during which the pools were iced, monitoring of the pier 4 tide pools were conducted. Results showed live cover on the pools to be on the order of 89 to 100%. In contrast, the rocky area surrounding the pools was found to have very limited live cover and poor biological function. Apart from various algae that colonized the pools, different invertebrate taxa were identified including copepods, amphipods, isopods, as well as Sabellidae and Spirorbis worms. In addition, two individuals of the Harris mud crab (Rhithropanopeus
Monitoring of the piles at Pier 6, three, ten and fourteen months post-deployment revealed live cover between 70 to 100% on ECOncrete®’s encasements with strong dominance of filter feeding organisms (barnacles, sessile polychaetes, sponges and bivalves), and
Few months Post Deployment: