The surface area of the triangular prism can be calculated by finding the sum of the areas of all its faces.
The triangular faces have a base of 10 ft and a height of 24 ft, so each one has an area of 0.5 * 10 * 24 = 120 ft². Since there are two triangular faces, their combined area is 2 * 120 = 240 ft².
The rectangular faces have dimensions of 10 ft by 26 ft, so each has an area of 10 * 26 = 260 ft². Since there are three rectangular faces, their combined area is 3 * 260 = 780 ft².
Adding the areas of the triangular and rectangular faces together gives us a total surface area of 240 ft² + 780 ft² = 1020 ft².
So, the surface area of the triangular prism is 1020 ft².
Therefore, the correct answer is 1,020 ft².