In the last few posts, I have been looking at the U.S. Army Corps of Engineers’ (USACE) efforts to restore Puerto Rico’s electric grid after Hurricanes Irma and Maria. As I noted earlier, the USACE is not leading these efforts. It is part of the Power Restoration Task Force to Coordinate the Restoration Efforts, which is headed by the Federal Emergency Management Agency (FEMA) and Puerto Rico’s government.
The USACE’s efforts have been guided by a four-part strategy, which includes: (1) the installation of emergency power generation; (2) restoring electricity generation to the pre-Maria average of 2500-3000 megawatts (MW); (3) repair of the grid’s transmission system; and (4) the rebuilding of the distribution system.
Since 18 October 2017, the USACE has regularly provided a snapshot of PREPA’s electricity generation capacity. Echoing the Puerto Rican government’s information portal, StatusPR, electricity generation is expressed as a percentage. StatusPR’s measurement is problematic because it does not specify how much electricity the island’s power plants are producing at a given point in time. The USACE’s statistics are more useful as they provide the actual megawatts of electricity being produced on a daily basis. For example, on 16 February 2018, electricity generation stood at 1928 MW, while it was 2008 MW four days later.
The USACE’s numbers show that we can measure power generation via three different mechanisms. First, we can calculate the actual generation of megawatts per day, which the following graph captures.
Because the USACE’s goal is to restore the grid’s generation capacity to between 2500 and 3000 megawatts, we can calculate the daily amount of power generation against these two goals. In the next graph, the blue line represents the actual percentage of generated power reported by the USACE’s infographics and StatusPR. This is the actual number consistently reported by the media in their reporting. Thus, on 20 February 2018 the reported percentage is 85%.
The red line uses 2500 MW as the goal, while the yellow line sets the goal to 3000 MW. In this manner, each line represents the percentage of generated electricity based on these goals. On 20 February total generation equaled 2008 MW. Thus, this represents 80% of the total power the USACE wants to generate in the near future, if we use 2500 MW as the generation goal. Similarly, if we use 3000 MW as the standard, the island’s power plants are generating 67% of the goal.
What role has the USACE played in restoring the grid’s power generation capacities? An assessment conducted by PREPA and the New York Power Authority found that most of Puerto Rico’s seven power plants experienced some damage because of Hurricane Maria. On 20 October 2017, the USACE’s Commanding General and Chief of Engineers, Lt. General Todd Semonite, explained that while damages to the grid’s transmission and distributions systems were the most challenging aspects of the restoration strategy, there was not “enough capacity in Puerto Rico’s existing power plants to provide electricity to the island.” Thus, one of the USACE’s main objectives was not only to work with PREPA to repair the existing power plants, but to also purchase and install new electricity generators.
On 16 October 2017, the USACE contracted the Pennsylvania-based Weston Solutions to install two 25MW generators in PREPA’s Palo Seco power plant. By the end of October, both plants were generating around 30MW of electricity, helping to “stabilize the power grid in the San Juan area”. In an effort to provide electricity to manufacturing facilities, hospitals and other critical infrastructure in the southeastern towns of the island, the USACE awarded a contract in early November 2017 to Aptim Federal Services to install a 25MW generator in the Yabucoa power plant. The new generator became operational on 9 December 2017.
The USACE and PREPA, along with their contractors, have increased the grids capacity to generate electricity. While things have improved, it has been a slow process. And given the Stafford Act’s provisions, the most problematic aspect of this strategy is that these restoration efforts are not transforming the island’s electricity system. Hence the post-Maria electricity system will be highly dependent on fossil fuels and it will fail to meet current environmental standards.
The next posts will examine the USACE efforts to restore the electric grid’s transmission and distribution systems.