Major closure(s) on I-35 this weekend

Initially this was set to be an overnight closure for next week we would've simply published in our closures report and move along. Yesterday afternoon our contractor, Anderson Columbia, got administrative approval to move the date up considerably.

The closure

All main lanes will close, one side at a time, at FM 1103 in Schertz while crews set bridge support beams overhead. Traffic will exit FM 1103, pass through the intersection and re-enter the highway at the next available ramp. No traffic will be permitted on the FM 1103 bridge during this closure.
When we say this closure will be one side at a time that means we'll only have one direction closed at once. Saturday night, starting at 9 p.m., we'll close the northbound main lanes. Southbound lanes will function normally. The main lanes will reopen by 5 a.m. Sunday.
Sunday night, starting at 9 p.m., we'll close the southbound side and have it reopened by 5 a.m. Monday. During this closure the northbound side will operate normally.
By the way we'll have trucks hauling those bridge support beams parked along the frontage roads during the day, so keep an eye out for that.

The good news
Daytime traffic will be relatively unaffected, unless you're traveling in the wee morning hours before dawn.

The rough news

This isn't the only major closure on I-35 in the area. Our folks in Austin will be shutting down all lanes of I-35 Friday night and Saturday night at William Cannon Drive in south Austin. That closure will run from 11 p.m. and about 10 a.m. each night. This will facilitate bridge demolition work for an expansion project they've got up that way.
They've also got an overnight closure at FM 3406 in Round Rock. That one will close northbound I-35 Friday at 10 p.m. (the lanes will reopen by 8 a.m. Saturday) and the southbound lanes Saturday at 10 p.m. (again, they'll reopen by 8 a.m. Sunday). This is so crews can set bridge beams, just like our closure.

Why the time change
The work in Austin was pre-planned for this weekend and coordinated up thataway. Our closure in Schertz was initially set for next week but pushed up due to inclement weather forecasts for next week.
Normally we require two weeks' notice from the contractor for any major closure so we can get things published well in advance. This requirement was set aside so we could move forward without adding delay to the project (planning for next weekend isn't possible; we prohibit major closures over Easter weekend).
This was only permitted because the closure will effectively impact overnight traffic only, avoiding impacts for long durations or during critical traffic hours. It will not be the new norm.