To solve this problem, I'll use the Pythagorean theorem.
1.- I'll find the first section of the bridge from left to right
x^2 = a^2 - b^2
x^2 = 1105^2 - 820^2
x^2 = 1221025 - 672400
x^2 = 548625
x = 740.7 ft
2.- I'll find the length of the second section of the bridge
y^2 = c^2 - b^2
y^2 = 1350^2 - 820^2
y^2 = 1822500 - 672400
y^2 = 1150100
y = 1072
3.- Calculate the length of the bridge
Bridge = 740.7 + 1072.4
Bridge = 1813.1 ft