As I drive down into the future lakebed, the terrain on either side of the gravel road becomes haggard and unkempt. Signs of the area’s past as farm and ranchland are evident, but shrubs and gnarled trees have grown high to create a deserted, post-apocalyptic landscape. This is the future site of Lower Bois d’Arc Creek Reservoir, a 16,600-acre lake soon to be constructed in rural Fannin County that will provide water to the North Texas Municipal Water District (NTMWD), serving Dallas suburbs in Collin, Dallas, Kaufman, Rockwall, and Hunt Counties. This lake recently received its permit from the U.S. Army Corps of Engineers, making it the first major reservoir in Texas since Lake Gilmer was constructed in 1999.
Reservoirs provide the majority of Texas’s drinking water. Texas has been building reservoirs since 1893 (Lake Austin), with the majority created in the 1940s through the 1960s. There are currently 188 in the state, according to the Texas State Historical Association. In the Dallas area, with the limited availability of river water and an aquifer too low to be practical on a large scale, reservoirs have been the main strategy for providing water to a growing region.
During a recent visit to Bonham, the Fannin County seat and nearest town to the proposed lake, a passive acceptance of the forthcoming project was evident among a number of residents. There are those who oppose it, most notably the landowners whose land will soon be flooded. However, in rural unincorporated areas, there are few options for organized resistance when a powerful water authority decides to plant a reservoir in your backyard. Yet the impact on Fannin County extends beyond the boundaries of the lake itself. The NTMWD is required to mitigate the habitat destruction caused by the new reservoir by creating new habitat nearby. Thus, an area slightly larger than the reservoir has been purchased to this end. In total, 33,441 acres of private land has been appropriated from local landowners (5 percent of Fannin County).
This situation in Fannin County magnifies a common but overlooked tension in the field. Despite the extreme impact, large-scale water infrastructure is strangely absent from the architectural conversation. Architects employ water conservation and collect stormwater at a building scale, but, like most, take the availability of water for granted. They know their project simply has to tap into the existing water main in the adjacent street. Yet the construction of buildings is an extremely water-intensive process, regardless of the water-efficient fixtures they specify. A significant amount of water is used during the production of concrete, with yet more added at the building site. To complete the curing process, concrete requires approximately one pound of water for every three pounds of concrete. Unfortunately, little data is available for water use in construction sites in the U.S.
Furthermore, under current infrastructural constraints, cities have no capacity to provide the resources for their own sustenance. Most cities do not generate power or harvest their drinking water within their boundaries. In light of this, cities can be seen as having a parasitic relationship with their surrounding rural areas. The ugly and unpleasant realities of power generation are located far out of sight of the cities themselves, and the inundation of private land for drinking water is undertaken in rural areas because, after all, they have plenty of land. This leeching of resources from the countryside enables cities to exist, but it is a reality that the design profession should begin to address.
In February 2018, the residents of the NTMWD used an average of just under 3,000 gallons per capita. A few months earlier, in August 2017, the water use was approximately 6,200 gallons per capita, which equates to 200 gallons per day per resident. Watering St. Augustine lawns accounts for much of that summertime use in this suburban water district.
While the NTMWD champions the new reservoir as critical to its supplies, it will only meet the demand for the year 2022 through 2040, a span of 18 years. At that point, additional reservoirs will be required. While Texas is a large state, land is still a finite resource, and new prime reservoir locations are very limited. Climate change also poses problems for the continued reliance on reservoirs. Record-breaking drought in 2011 meant nearly all the reservoirs were significantly below capacity, with some municipalities enacting mandatory water conservation measures. Future droughts will be harsher, posing severe challenges to water provision.
As architects strive to address the challenges of building in our current environment, a knowledge of the complex and connected relationship of water to development and construction is important. Architects and planners, water officials, and more will need to be creative in solving the complex problem of providing water to future populations. While American cities have not yet had to deal with the scale of catastrophic water shortage that occurred in Cape Town, South Africa, it should give us all pause as a similar situation in North Texas is quite possible.