Lake Thoreau Pool Project

Lake Thoreau Pool Project


Reston Association’s Board of Directors is currently reviewing an engineering report assessing the condition of the Lake Thoreau pool facility (pictured above when it first opened in 1981). The board heard a presentation at its Oct. 24, 2019 meeting from RA’s Capital Projects team regarding the Terracon Consultants report and is considering options to either repair the pool or reimagine the facility as has been done at other association pools over the last 20 years.

The current Terracon report, along with a 2017 report done by Dewberry Consultants, discovered various structural problems with the Lake Thoreau pool. Some of the findings include potential safety issues such as timber retaining walls that need to be replaced. Cracks were also found in the pool shell and concrete deck.

Yet to be determined cost estimates for repairs, along with member feedback, will be taken into account as the board decides on a course of action. Because the pool does not currently meet Fairfax County safety guidelines, and extensive work will need to be done to bring the facility into compliance, it is possible Lake Thoreau pool will be closed for the 2020 season.

Updates on the Lake Thoreau pool will be posted here and through other RA communications channels as the process to address the findings in the report proceeds. Watch the Nov. 4, 2019 community meeting video by clicking the image below.


Lake Thoreau Pool has been and will continue to be a Reston Association amenity.

In 2005, as part of the Parks and Recreation Open Space Plan, a 10-year facility plan for the pools was created. As the useful life of many components of facilities were coming to an end, the facilities were reimagined through community input sessions, design architects and staff to bring new amenities for members to enjoy. These efforts brought renovations that included Uplands, Hunters Woods, Glade and concluded in 2014 with the Dogwood Pool. Post renovation, usage increased and was maintained at a higher level than in previous years with the original facility configuration.

While there is no RA facility master plan, it is Lake Thoreau Pool’s turn. The useful life of many components has come to an end and need repair or replacement, according to the 2014 and 2019 Reserve Studies. In 2016, an annual site inspection conducted by staff identified several potential issues including deteriorating conditions at the retaining wall, growing cracks in the pool shell and visual movement of deck slabs.

In 2017, the RA Capital Projects Department hired Dewberry Consultants to perform a visual and facility record study of the pool, focusing on the walls and shell. Dewberry’s recommendations included additional testing of the site as well as an immediate identification of the east retaining wall needing replacement “in the relatively near future (1-2 years maximum).”

In December of 2018, RA staff requested the allocation of funds to perform a temporary structural repair on the pool shell prior to the 2019 pool season. In March of 2019, the repairs were performed as a “Band Aid” to keep the facility open for the 2019 season. Knowing this was not a permanent solution, re-evaluation after the pool closed this summer was conducted by Terracon and Kimley Horn, using guidance and suggestions from the Dewberry report, to complete the analysis of the Lake Thoreau Pool retaining wall, deck and pool shell.

Findings from the Terracon/Kimley Horn report concluded that the Lake Thoreau Pool has been experiencing cracking in the pool shell and on the pool deck in various locations as a result of a moving timber retaining wall that has experienced general deterioration after nearly 40 years of service. Based on their evaluation as well as Fairfax County safety standards for retaining walls, they concluded that the existing timber retaining walls should be replaced/remediated and thus, the facility should not operate in its current condition until the retaining wall is replaced.

In light of the report’s findings, the cost of performing one-off repairs rather than taking a holistic approach, and noting the lack of ADA compliance, the board voted in October 2019 to include $350,000 for Lake Thoreau in the 2020 capital budget for facility planning to include a landscape architect to facilitate a community engagement process, architecture and engineering. The final amount will be voted on in November with the approval of the 2020 budget.

For questions about the Lake Thoreau Pool project, email