The Broken Canal Sluice And The Flooded Hillside Cellar
CHAPTER 5: SHATTERING THE PLUG
The subterranean gallery shook with violent vibrations as the primary scour valve discharged its torrent into the river gorge. But in the secondary agricultural conduit, the water was backing up violently against the concrete plug, creating a dangerous hydraulic hammer that threatened to blow out the century-old brick archways supporting the ceiling.
“Julian poured this plug during the summer shutdown!” Wade shouted over the roar of the water, kneeling beside the grey mass of concrete. His fingers traced the jagged, unbonded seam where the commercial cement met the nineteenth-century granite. “He used fast-curing expanding grout to completely block the six-foot gravity pipe leading to Willow Valley!”
Elena knelt beside him, shining her light on the concrete face. “The back-pressure is building behind this plug at seventy pounds per square inch! Wade, if this concrete breaks away unevenly, it will act like a missile inside the stone tunnel! It’ll shatter the downstream diversion gates and flood the family orchards with an eight-foot tidal wave!”
“We have to fracture it along the expansion seam before the hydraulic pressure peaks!” Wade yelled.
He keyed his chest radio. “Henderson! Send down the pneumatic rock-drill and two five-ton hydraulic spreading rams on the secondary winch line! Right now!”
Three agonizing minutes later, the steel winch line descended through the access shaft, lowering a yellow pneumatic demolition drill, high-pressure hydraulic hoses, and two heavy steel spreading wedges.
Wade dragged the sixty-pound drill through the knee-deep current, planting the tungsten-carbide bit against the edge where the illegal concrete plug met the granite wall. He connected the air line, set his boots against the slimy floor, and squeezed the trigger.
RAT-TAT-TAT-TAT-TAT-TAT!
The pneumatic hammer exploded into life with an ear-splitting, concussive shriek that echoed off the stone vault. Blue sparks and grey concrete dust sprayed into the air as the carbide bit chewed into the plug. Wade leaned his entire body weight into the vibrating steel, his muscles burning with agony as the drill bit sank four inches, then six inches into the grout.
Elena positioned the hydraulic spreader ram into the pilot hole. She attached the hand pump and began throwing her weight against the pump handle with rhythmic, desperate strokes.
The hydraulic gauge needle surged: one ton… three tons… four point five tons.
Deep inside the concrete plug, a dull, sickening CRACK reverberated through the stone. A spiderweb of fine fractures spread across the face of the barrier. Water began to weep from the fissures under tremendous pressure, spraying like high-velocity needles across their protective gear.
“Keep drilling, Wade!” Elena shouted, pumping the hydraulic handle with every ounce of strength left in her arms. “The seam is opening! Five tons! Maximum pressure!”
Wade repositioned the drill bit to the center core, driving the hammer with furious intensity. CRACK!
A secondary fissure split the concrete vertically from top to bottom.
Suddenly, with the terrifying force of a subterranean explosion, the water pressure behind the plug blew the concrete barrier apart. A five-hundred-pound slab of shattered grout was blasted down the conduit, followed instantly by a thunderous, twenty-foot wave of clear, pressurized mountain water roaring into the secondary diversion channel.
Wade and Elena were knocked off their feet by the violent displacement of air and spray, slamming back against the granite bulkhead. Wade caught Elena’s safety tether, bracing his heels against an iron rungs ladder embedded in the wall as the roaring current surged past their waists.
Above the roar of the water, Wade’s chest radio crackled to life with Captain Henderson’s voice:
“Miller! Rios! The piezometer readings just plummeted forty percent! The hydrostatic pressure beneath Vanguard’s vineyard has stabilized! The dam is holding! Repeat, the dam is holding!”
Elena wiped the cold mineral water from her respirator visor, looking at Wade through the dim yellow beam of her lamp. Her chest heaved with exhaustion, but a fierce, triumphant grin broke across her face.
“We did it, Wade,” she breathed. “Willow Valley is safe.”
“Not yet,” Henderson’s voice cut in again, tight with sudden alarm. “Miller, listen to me! Highway patrol just reported Julian Sterling’s Mercedes SUV speeding north on Canyon Fire Road toward his private vineyard airstrip! He’s loaded luggage and metal lockboxes into the back! The local airport manager reports a private twin-engine turboprop has filed an emergency flight plan for Reno, departing in twenty minutes! He’s trying to skip the country before the state marshals arrive!”
Wade grabbed his safety line, pulling himself toward the winch cradle with iron determination.
“He’s not leaving this valley,” Wade said, his voice cold and lethal. “Haul us up, Henderson!”
