Scalding Lime at Nine Bar

Could three men and a woman with hand tools kill an eight-foot trench beast before it cracked the drydock foundation? Halldor hauled himself up through the bilge manhole into the deafening roar of the culvert station, tasting hot mineral tallow and pulverized shale on his tongue. Behind him, Kolskegg scrambled out onto the iron decking, dragging the tail of the pneumatic hose. Forty feet below ground level, the stone chamber shivered like a struck bell. The primary drainage turbine was bucking violently in its mounting cradle, three of its sheared four-inch anchor bolts jutting up like jagged gray teeth. Halldor needed to reach the overhead distribution header and drop nine bar of superheated lime steam into the flooded pit before the thrashing turbine shaft tore the caisson gate tracks off their granite sills.

Across the catwalk, Chief Pumpwright Brynhild stood braced against the brass governor housing, both hands clamped on the main bypass lever. Her oilskin coat was drenched in foul bilge froth, her face gray with soot. Below the catwalk grating, the lower sump had turned into a churning cesspool of black grease and viridian foam.

"The bedplate bolts sheared three minutes ago!" Brynhild screamed over the shriek of spinning steel. "She's throwing sixty tons of unbalanced torque into the granite! If the impeller seizes while the culvert is drawing five thousand gallons, the back-surge will smash the outer gate dogs!"

Gestsk stood six paces away at the caisson control console, his sea-pickled face illuminated by the flickering yellow glow of two overhead gas lamps. The old harbor-master had an iron pinch-bar jammed beneath the emergency winch trip-latch, holding the chain drum from spinning free under the violent harmonic vibrations.

"The outer tracks are already grinding, Halldor!" Gestsk bellowed, pointing down through the iron mesh floor. "Look at the shaft housing! It's not silt fouling the blades!"

Halldor looked.

Rising from the knee-deep sump water, an eight-foot adult polyp was coiled three times around the turbine's rotating horizontal drive shaft. Its calcified outer shell, thick as three-inch rolled armor plate and bristling with razor-sharp barnacle ridges, groaned against the spinning forged steel. Bundles of black, muscular tendrils thick as dock hawsers were jammed into the brass lubrication ports. As the monster fed on the scalding grease cups, its venting pores pumped streams of emerald acid straight across the throttle linkage. The brass levers were bubbling into green froth, melting away in front of their eyes. Every full rotation of the choked shaft sent a shuddering shockwave through the masonry floor.

"Kolskegg!" Halldor yelled, pointing toward the wall racks. "Man the compressed-air manifold! Keep eighty pounds of head on the boiler feed lines!"

The apprentice leaped over the vibrating floorplates toward the air valves.

Halldor unslung his short dog-wrench and bounded up the iron gantry ladder toward the overhead steam header. The heat rising from the pipe scalded through the palms of his leather work gloves. The lime-steam line he had coupled in the limber holes beneath Drakansk’s boilers was groaning with immense pressure. The needle on the iron Bourdon gauge trembled at eight and a half bar, bumping the red index pin.

"Dump the line, Halldor!" Brynhild shouted from below, hauling back on the cold-water bypass. "The turbine bearing is white-hot! Dump it now!"

Halldor grabbed the heavy cast-iron handwheel of the emergency dump valve and heaved his weight against it.

The iron wheel did not budge.

Acid vapors boiling out of the sump had reached the upper manifold. The brass spindle was crusted in crusty, pale-green chemical scale, locking the valve stem fast in its gland. Below, the turbine let out an ear-splitting shriek as another anchor bolt snapped under the strain, pinging off the granite ceiling like a cannonball. The drive shaft wobbled two inches off-center, tearing cast-iron teeth out of the reduction gear. If the gear housing shattered, fifty tons of seawater trapped behind the outer caisson gates would drop through the fractured masonry, capsizing the dreadnoughts in their cradles.

Halldor did not freeze. Thirty years of fitting steam joints in the dark had taught his fingers how iron surrendered. He unhooked the sixteen-inch pinch-bar from his tool loop and jammed its chisel point behind the counterweight arm of the stuck valve gland.

With his left hand, he hooked the short dog-wrench over the rim of the stubborn wheel. With his right, he threw his entire weight onto the pinch-bar, levering the seized brass stem against the frozen seat while his boots skidded on the oily iron treads.

Metal screeched against metal. A burst of scalding condensate spit past the packing nuts, scorching Halldor's forearm through his canvas coat. He leaned his shoulder into the bar and gave a violent, rhythmic downward heave.

The seal cracked.

The heavy handwheel spun four full rotations in Halldor's grip.

Inside the twelve-inch overhead manifold, nine bar of superheated, quicklime-saturated steam found an exit. The valve throat roared like an exploding boiler. Down through the four-inch distribution risers, a blizzard of blinding white, caustic vapor plunged straight into the flooded sump pit.

"Down! Rebreathers down!" Halldor roared as he threw himself flat on the iron catwalk.

Gestsk slammed down the heavy levers of the caisson blast-curtains. Counterweight chains screamed through the overhead pulleys as three solid sheets of half-inch boilerplate plunged down the track grooves, sealing the sump pit off from the upper engine room with three thunderous clangs.

The world beneath the catwalk turned into a white furnace.

Through the observation port of the blast-curtain, Halldor pulled his canvas hood tight and clamped his charcoal rebreather against his jaw. The sight inside the sealed sump was apocalyptic. The superheated lime steam, caustic as lye and boiling at over two hundred degrees, hit the black sludge water and flashed it instantly into a bubbling chemical cauldron.

The adult polyp reacted instantly. Deprived of oxygen and scalded by the concentrated alkali wash, the creature's outer armor began to blister and split. Deep cracks ripped along its calcified carapace, weeping curdled green ichor that sizzled and turned black in the caustic mist. The beast uncoiled its muscular coils from the spinning drive shaft, thrashing wildly against the granite walls. Its barbed sensory tendrils whipped against the blast-curtains, leaving acid-etched grooves across the thick plate before the white steam ate through their rubbery sheaths, melting them into translucent strings of tallow.

The monster slammed its central shell against the turbine casing in a final, frantic spasm. Then the nine-bar lime steam enveloped the core. The armored shell disintegrated into chalky, bubbling slag. Within thirty seconds, the thrashing stopped. The violent vibration died away, replaced by the deep, rhythmic hum of the turbine blades spinning free in clean, churning water.

Gestsk reached out and opened the upper exhaust flues. The massive copper draft fans whined, sucking the boiling white vapor out through the granite chimneys toward the night sky.

Halldor pushed himself up from the catwalk, his lungs burning behind the charcoal filter. His right sleeve was soaked with lime condensate, the canvas crusting stiff in the draft. He descended the iron ladder with heavy, deliberate steps, his boots clanging on each rung.

Brynhild let go of the turbine governor, her knuckles bloodless and stained with soot. She leaned against the railing, coughing twice into the crook of her elbow before pulling her goggles down around her neck.

"Turbine intake pressure is holding at eighteen inches of vacuum," she croaked, checking the brass gauges. "The drainage culverts are drawing clean water. But your riveters will have to haul thirty sacks of lime sludge out of my pump pit before the morning shift."

"My riveters do not shovel pump-man grease, Brynhild," Halldor replied, his voice rough behind his collar. "Brandsk’s caulkers laid the tallow. Charge the lodge fourpence an hour for the shovel work."

Gestsk wiped salt spray and sweat from his gray beard with the back of his hand. He stepped over the buckled floorplates and knelt beside the lower blast-curtain inspection port, shining his hooded inspection lantern down into the drained stone sump.

Halldor walked over and stood beside the harbor-master, looking down.

The monster was gone, reduced to a heap of dissolved gray grit and curdled tallow resting against the drainage grates. The caisson gate tracks were intact; the lock pins had held.

Yet Gestsk did not turn off his lantern. He lowered the beam past the cleared turbine casing, sweeping the yellow circle of light along the four-foot granite bedplate supporting the entire culvert station.

Halldor followed the light.

Subjected to the sudden shock of nine-bar boiling steam against freezing North Sea seepage, the century-old foundation stone had failed. A jagged, spiderweb fracture ran directly across the granite floor, splitting the bedrock between the primary sump and the drainage tunnel that fed Basin One. The crack was already weeping a thin, black trickle of mud from the deep shale beds below.

Gestsk rested his calloused thumb against the cracked masonry. He said nothing. The gap in the stone remained open, pointing straight toward the keel blocks of the second dreadnought.