I believe they were required to preserve the original span because of historical feelings about it (although I don't think it had any status as a landmark). The bridge was not considered safe anymore and it also will be rebuilt. I haven't been in North Woodside in some time. The yard in Lyttonsville will come on line second and there should be an initial operating segment on the East end containing the Riverdale yard. If I had to predict on no information but just what the finished alignment should be I would guess the initial segment they would turn on would run to College Park Metro to New Carlonton. That said I'd expect the whole line to look finished before that segment comes online, they might stage the traction and finishing work more to lower to workforce size. They are arguing about money to meet schedule still. Aug 18, 2022 is still the official opening of at least part of the project. Given how the Silver Line has looked I would expect the stations to look complete about a year before that (though heavy and light rail are different of course, it still makes sense to have the stations done before you lay the rail inside them). The grading and prep work for that is less easy to spot. You never know what relocations are still underground. They had a dispute with WSSC at one point but given that was public entity they probably found a solution that all sides can accept. I still feel that Bethesda and perhaps Silver Spring have the most scope for delays going forward as those stations have to more complex interconnections. Though the Silver Spring station could operate without the project finishing in terms of ramps and bridges to the Red Line. I perhaps benefit the most just from them finishing the CCT, though they could elect to do that faster than the rest of the project I don't think it will beat it by much. Perhaps while they are commissioning and testing the system it will open so maybe Spring 2022 at best... (I don't see how it runs through Bethesda station again until that project is basically done.