Schools in Zip Code 99116

Schools in ZIP code 99116 include three schools serving grades PK–12 and 695 students in the Grand Coulee Dam area: Lake Roosevelt Elementary (PK–6), Lake Roosevelt Junior/Senior High School (7–12), and Lake Roosevelt Alternative School (9–12). All are part of the Grand Coulee Dam School District, which ranks near the bottom statewide at 229th out of 238 districts. The elementary school enrolls 354 students, the traditional high school 308, and the alternative school 33.

Lake Roosevelt Elementary is the strongest-ranked traditional school locally, at the 11th statewide percentile in 2025–2026, improving from the 6th percentile the previous year. Its proficiency was 23.21% in English language arts, 22.16% in math, and 30.77% in science. Math and science improved year over year, although results remain below state averages. Lake Roosevelt Junior/Senior High School ranked at the 7th percentile. Its proficiency was 23.66% in English, 13.08% in math, and 26.32% in science. High school math is the clearest academic concern, while science improved and English declined compared with the prior year.

One encouraging difference is that Lake Roosevelt Junior/Senior High School reported a 90% graduation rate in 2024–2025, above the 82.6% state rate, despite its low test proficiency. Lake Roosevelt Alternative School serves a much smaller, higher-need student group, with 33 students and 90.91% free/reduced-price lunch participation. Its available graduation and dropout figures are older—63% graduation in 2022–2023 and 26.3% dropout in 2021–2022—so they should be interpreted cautiously. Overall, families should expect substantial academic gaps compared with Washington averages, with the most important improvement area being secondary math.