Overdue Maintenance

Jack parks the truck just before the exit of a tunnel and they get out. Roaring water echoes from somewhere deep below. Annie grabs her bag and goes ahead. The tunnel wall to the right features doors, large gates, and windows that allow a peek into abandoned offices, storage spaces, and control rooms. The end of the tunnel connects to a balcony with rusted metal walkways going to either side, extending into a narrow ravine. She steps onto it, making sure to keep her distance to the rusty railing, and looks around. The walkway to the right connects to the top of a dam blocking the ravine. A couple bushes, flowers, and a small tree grow there, partially concealing the rusty armatures? and the wall is green from moss and small ferns. Water flows over the spillway, falling into the depths below where it joins a torrent of water rushing out of two big pipes at the bottom of the ravine. The other walkway leads to a freestanding staircase going all the way down.

Jack walks up next to her, grabbing hold of the railing, trying to shake it but it doesn't budge.
Looks like it's gonna hold.
He turns to the right and steps onto the walkway before having an idea. He turns to Annie and Michelle:
Ladies first.
While Annie is still thinking about a response, Michelle's response is immediate:
Thanks but you can go ahead.
You two are lighter though.

They walk to the dam, look into the windows

Some events have changed, this needs to be tied together again.

Annie? Michelle calls ? her. They are standing by one of the doors in the tunnel wall. Jack pulls a wire through the latch and opens it. Inside is the main control room. The wall to the right is lined with metal cabinets that have levers, buttons, switches, and large gauges on them. The wall to the left features a front of windows, allowing a view of the spillway and the top of the dam. Some of the windows have cracks but somehow none are broken. In front of the windows is a collection of random furniture, mostly desks and chairs. The center of the room is taken up by a large console with more buttons, switches, and gauges that is facing the windows and an opening in the floor covered by a thick glass pane. They roam around the room for a moment. Annie looks outside, admiring the flowering lilypads floating in the water that is held back by the dam.

Michelle asks: Jack, what's the status on that dome city you're building? You guys only have two years to finish that project.
Oh no, I guess we're gonna have to slack less while waiting for bureaucracy to take its course.
Look, the power lines are gonna get hooked up to the battery bank in a couple days. Aren't you excited for that?
Not my department but I sure hope we're no longer gonna need these portable batteries down there. Having a working power grid is gonna be so nice.
They are looking at a calendar on the wall and laughing. It shows October 1991 with a few entries and crossed-off days.

Jack looks at a clipboard that was placed on the control panel on the center console.
The next maintenence expedition is scheduled for 2011... I don't think anyone ever stepped foot in here after <dome city> was closed off.
It wouldn't surprise me. Annie turns around and leans against the center console. Apart from a small group, the entire city is legitimately scared of the outside world.
I mean they're probably right, the outside world is dangerous. Look down, by the way.
Whoa!
She stumbles backwards. Without noticing it, she had walked onto the glass pane. It allows a view down into a hall filled with machinery.

They gather around it and look down. The floor is flooded by water rushing out of a burst pipe and spraying out from the flanges of many other pipe sections.
It's a miracle this place is still running.

missing section

Jack turns the key and the gate starts to move up, scrathcing and squeeking as it does, revealing a bunch of crates. About half-way up, it gets stuck, making a buzzing noise. Jack lets go of the key, it stops. They duck under the gate and look around. They find themselves in a warehouse much larger than the gate and windows facing the tunnel would lead to assume.
Now that, ladies and gentlemen, is what I call an adequate stockpile of spare parts.
Jack walks up to a huge crate and wipes the dust off the label: Turbine C, replacement 2.

exploring the warehouse, they find a forklift and a railroad in the back