They have been working on replacing the bridges on Little Falls Trail in Bethesda, MD since last fall, but the end is in sight now. The bridges themselves have been open for a while, although one of them still doesn't have a ramp up to it. They are in the process (and have been for a couple of weeks) of removing the thick layer of mulch they put down over the trail to protect it. The very end of the trail, near Albermarle Street still has a big pile of mulch and some heavy duty wood planks but the rest has been cleared.
The trail here used to have about a foot of wood mulch over it, all has been removed and the trail swept clean. There is still some construction equipment parked along the trail.
After the clean up, they relandscape the area. Relandscaping might be a strong word for what they are doing, but after carefully cleaning up all the mulch and clearing a couple of feet on each side of the trail, they are putting straw down over the bare dirt. I suspect they put grass seed under the straw.
Not everything is complete, there are a couple of places where the trail has been torn up and needs to be replaced, primarily at Albermarle St, the ramp leading to one of the bridges, and the area where the rebuilt a drainage creek that goes under the trail. After that, everything will be back to normal, but as of now, as long as you don't require handicap accessibility it is fully usable.