Yes, the solicitation always includes the best information the government has for the site, but that information is never perfect in these types of projects. Until you get in the ground, its just a glorified SWAG. Can you suggest a better way to handle these contingencies other than the unit-priced options we've been using? In years past, we used CPAF contracts for this type of work, but the policy pendulum has swung away from these and we're mandated to issue FFP PB contracts/CTOs for almost everything. I saw FAR 17.200( too, but further down it states "However, it does not preclude the use