“Closer to the breach?”
“Yes.”
Joe began to walk. High above, the dive boat moved with him. He pulled the trigger again, aiming the reflective stream of particles right at the center of the eddy.
The glowing particles swirled and the majority of the spray was sucked into a gap between two railroad tie–sized beams of concrete, vanishing in a blink like fish disappearing into coral at the sight of a predator. It happened so quick, Joe had to trigger a second burst of the spray just to be sure.
“I’ve found it,” he said. “The gap is between two concrete pylons in the riprap. I can feel the suction from it.”
As Joe got closer, he felt himself being pulled into the gap. He could see sand and gravel disappearing from around the edges of the beams. A crater was widening beneath them, he could see what looked like a twenty-inch-diameter hole.
He wedged a foot against one of the concrete beams to keep from getting sucked in. As much as he wanted to block the hole, he personally didn’t want to be the plug.
“I’m ready for the mud.”
“Mud?”
“The Ultra-Set,” Joe clarified, awkwardly holding himself back.
“Starting the pumps now,” the supervisor said.
Careful to maintain his balance, Joe managed to jam the front end of the hose into the opening. As the pressure came up, he pulled the trigger.
The Ultra-Set began flowing out at high pressure, some of it escaped into the water, looking like magenta-colored whipped cream as it expanded and hardened. Most of it funneled into the breach drawn down by the suction of the unwanted tunnel.
“How much does this stuff expand?” Joe asked.
“Twenty times its original volume,” the supervisor said. “And then it hardens.”
Joe hoped it would. And
if there were any microbots left in the core, trying to widen and expand the breach, he hoped they would be caught in it and frozen in place like insects in amber.
The current tugged him to the left and he heard the rumble of the falls over the motor of the boat and the pump above him.
“Anything?” Joe asked after about thirty seconds.
“Control reports orange dye from the lower geyser,” the supervisor said. “The water flow is unchanged.”
“How much of this stuff do we have?”
“The tank holds five hundred gallons,” the supervisor told him. “It pumps two hundred gallons per minute.”
Joe hoped it would be enough. He held the nozzle and reset his feet to fight the crosscurrent.
The major came on the radio next.
“Mr. Zavala, we’re awfully close to the breach. We’re running full power just to keep ourselves out of the fray. If you could hurry …”
Joe looked up through the window in the top of the huge helmet. He could see the lights on the underside of the boat and the swirling turbulence where the propeller was churning full speed.
“I’m not exactly taking a lunch break down here,” he said.
Joe shut the nozzle off for a moment, climbed up on the boulder field and, using the leverage of his feet, pushed a boulder down the slope and into the gap. It plugged somewhat, leaving a much smaller fissure.
Joe jammed the hose back into place and pulled the trigger again. “Go to full pressure on the hose,” he said. “We either fill it or we don’t.”
Joe held the trigger down and the Ultra-Set surged forward. As it did, he felt the current changing around him. The pull from the opening in front of him was lessening, but the side load dragging him toward the breach was picking up steam.