Architect : Lake Flato

Year Built : 2018

Location : San Antonio , Texas , USA


Located at the confluence of the San Antonio River and San Pedro Creek, the idea of confluence is ingrained in every aspect— from big gestures like the landform of the park representing the convergence of eco-types in the South Texas region, to the pavilion “petals” imitating the form of plants that are structured to funnel dew and rainwater to their roots, down to the scale of the paver patterns reminiscent of the flow and confluence of waterways.



Constructed of concrete petals designed thoughtfully to sit lightly upon the land, the BHP Pavilion— the main pavilion— forms a geometry that collects and funnels rainwater into a sitewide water catchment system. The pavilions throughout the park provide shade and shelter, simultaneously engaging visitors to visualize the cycle of water at Confluence Park and how it relates directly to the San Antonio Rivershed.

The multi-purpose Estella Avery Education Center, featuring a green roof that provides thermal mass for passive heating and cooling, serves as a classroom space that opens to the pavilion. Rainwater collected through the site-wide water catchment system serves as the primary source of water throughout the park, and the entire site is powered by a photovoltaic array providing 100% of on-site energy on a yearly basis.


The pavilion geometry is goverened by 3 parameters –

The height of the arches connecting the bottom circle and upper polygon.

The deformation of the upper polygon changes the top profile of the surface from a flat top surface to a curved top surface.

The offset of the surface which controls the thin groves generated along the surface – from top to bottom.