The Crawling Silt-Dredge, Excavation Rig Nine

The Crawling Silt-Dredge is both machine and settlement, a towering crawler that drags its workers, workshops, fuel stores, and modular living-wagons across the shifting plains beyond the Glass Spires of Al-Zahir. Hydraulic scoops bite into dried riverbeds while suction pumps draw up mineral-rich mud. The rig claims to recover ancient canal masonry and valuable ore, yet its crews increasingly find imperial records, sealed chambers, and evidence that the land was never abandoned willingly.

Back to Generator

Create your own Settlement

Mobile frontier extraction site

The Crawling Silt-Dredge, Excavation Rig Nine

A steam crawler that digs for ore by day and uncovers old crimes by night.

TypeMobile frontier extraction site

PopulationApproximately 80 permanent workers, including machine-operators, pneumatic salvagers, boiler-tenders, mechanics, cooks, medical attendants, and armed security contractors. The population may swell by 20 to 40 when caravans, inspectors, smugglers, or temporary labor crews come aboard.

WealthUneven. The rigmaster, contractors, and outside factors deal in hundreds of gold pieces, while most workers are paid in silver pieces, meal allotments, and deductions against company debt.

GovernmentCompany charter administered by a rigmaster, with authority enforced through contracts, ration control, and armed security.

ReadinessThe security contractors are alert against raids but poorly trained for sabotage from within. During a sandstorm, half the guards protect the boilers and fuel stores, leaving the Salvage Line and living-wagons dangerously exposed.

“The Crawling Silt-Dredge groans across the alluvial flats beneath a sky bleached white by heat and blown glass dust. Every surface trembles with piston strokes, while hot oil, wet clay, and coal smoke cling to the tongue. Workers shout through brass speaking tubes, boots ring against iron decking, and the entire settlement tilts, lurches, and crawls toward whatever lies buried beneath the next ridge.”

Gallery

No images yet. Click to add.

Connections

Geography

RegionThe shifting alluvial plains on the periphery of the Sultanate of Verulana, east of the Glass Spires of Al-Zahir.

ClimateHot, dry, and violently changeable. Clear days bring blinding glare and furnace heat, while sandstorms can erase tracks, bury equipment, and reduce visibility to a few feet.

TerrainDry riverbeds, mud flats, buried canal embankments, cracked salt pans, and low dunes of powdered glass surround the crawler. Ancient masonry periodically rises from the silt after storms.

Travel Links

A rough supply route connects the rig to caravan towns beneath the Glass Spires.The crawler follows old irrigation channels toward abandoned settlements and buried reservoirs.Smugglers use storm-cut ravines to approach the rear living-wagons.Sultanate inspectors arrive by elemental skiff or guarded caravan.

Culture

People here respect endurance more than pedigree. A person who keeps the boilers fed during a sandstorm earns more loyalty than a factor with a stamped contract. Still, every kindness is measured against debt. Workers know the rig can leave them behind, contractors know the Sultanate can revoke their permits, and everyone understands that buried history is worth more than the lives spent uncovering it.

Races

HumansDwarvesGnomesGenasiDragonborn

Religions

Veneration of ancestral engineers and canal-buildersPrivate devotions to elemental powers of earth and fireSmall household shrines to the Dawn Nexus and imperial protection

Arts & Entertainment

Entertainment must survive motion. Workers carve tally marks into brass plates, trade serialized adventure pamphlets, and compete in timed climbs across the Iron Treads while the crawler moves. The most prized art is practical, a well-balanced wrench, a painted boiler sigil, or a song whose rhythm matches the pistons. At night, salvaged lanterns turn the Mud-Hopper Deck into a rattling theater of shadows, wagers, and whispered accusations.

History

The Crawling Silt-Dredge began as an ambitious extraction machine and became a moving company town by necessity. Its owners publicly celebrate every discovery as proof of Verulanan ingenuity, but the workers remember a harsher history. The crawler has repeatedly uncovered signs of erased communities, and its strange navigation core seems less interested in mineral wealth than in reaching whatever remains beneath those ruins.

Three decades agoThe First CrawlThe first Excavation Rig Nine was assembled from decommissioned canal engines and mining machines. Its builders expected a slow dredger, not a mobile settlement that could cross open desert.

Twenty-one years agoThe Buried DistrictThe official account says the rig discovered a profitable mineral bed beneath an abandoned canal. Older workers insist the crew found a sealed district first, then invented the mineral claim to justify taking it apart.

Nine years agoThe Brass HeartstormA sandstorm buried the eastern half of the rig for two days. When the crawler emerged, its navigation core had been repaired with a component no living engineer recognized.

Four years agoThe Long LedgerThe current charter expanded debt contracts after a failed season, binding workers to the crawler through food, medicine, and equipment deductions.

Government

LeaderRigmaster Pell Orrow, a capable engineer who cannot admit when he is wrong. He believes every problem can be solved by keeping the crawler moving, even when that means overriding safety warnings and sacrificing workers to preserve momentum.

Company charter administered by a rigmaster, with authority enforced through contracts, ration control, and armed security.

Key Laws

No one may leave the crawler during active excavation without a written pass.Recovered objects must be reported before removal from the Salvage Line.Tampering with boilers, tracks, pumps, or navigation equipment is punishable by confinement and debt seizure.Workers who abandon a contract forfeit unpaid wages and may be listed as fugitives by the charter holders.

Problems

The rig's route is no longer controlled by its human crew.

The crawler keeps altering its route toward buried imperial structures, forcing Pell to choose between obeying the navigation engine and honoring the charter's profitable extraction schedule.

Workers may be imprisoned inside the crawler, not lost in the desert.

A boiler crew vanished after refusing an unsafe shift, and the Charter Office claims they deserted. Their tools were later found inside a sealed maintenance crawlspace.

An official inspection could trigger a riot, a mass arrest, or both.

A Sultanate inspection party is approaching with authority to seize all imperial artifacts. The Salvage Line intends to hide its most valuable discoveries before the inspectors arrive.

Economy

Industries

Alluvial dredgingArchaeological salvageHydraulic separationBoiler maintenanceContract security

Scarcity

Fresh water, medicine, replacement seals, and trustworthy labor contracts are scarce. The rig can process valuable silt, but it cannot safely remain in one place long enough to grow food or repair major damage.

Wealth LevelUneven. The rigmaster, contractors, and outside factors deal in hundreds of gold pieces, while most workers are paid in silver pieces, meal allotments, and deductions against company debt.

Exports

Refined mineral concentratesRecovered imperial metalworkAncient canal stoneGlass-steel fragmentsSalvaged minor magic items

Imports

CoalFresh waterFoodCrossbow boltsReplacement gears and boiler parts

Defenses

Fortifications

Riveted iron plating surrounds the Boiler Room and command gantry.Rotating ballista platforms cover the front and rear approaches.The Iron Treads can crush barricades, wagons, and attackers beneath their reinforced plates.Emergency steam vents can scald creatures attempting to climb the crawler.

The Silt Wardens(18 guards, including 4 veterans and 2 mounted heavy crossbow teams)

The Silt Wardens are armed contractors hired from caravan guards and former Sultanate soldiers. They use crossbows, scimitars, shields, and heavy leather reinforced with iron plates. Their loyalty follows signed contracts, except when their commander believes the rig is being used to bury evidence of exploitation.

Law & Order

crime Level: High, though most crimes are concealed as equipment failures, contract disputes, or storm losses. Theft, sabotage, smuggling, and violence are common around the Salvage Line.
enforcement: The Silt Wardens patrol visible decks, while the Charter Office controls access passes and ration cards. The Boiler Hands maintain their own watch during night shifts because they do not trust the guards.
typical Punishment: Fines, wage seizure, ration reduction, confinement in an empty storage wagon, or forced assignment to the hottest boiler shifts. Serious sabotage brings shackling and transfer to a Sultanate authority.

Captain Hadrik Vale

NPC

Security commander

A broad-shouldered dragonborn whose armor is polished only on the side facing the Charter Office. He keeps one hand near his crossbow even while eating.

Mara Venn

NPC

Boiler forewoman

A human woman with a shaved head, soot-blackened cheeks, and a brass token tied around her wrist for every worker lost under the current charter.

Sella Quist

NPC

Salvage broker

A pale genasi factor who wears immaculate gloves despite the grime and never negotiates without touching the object being priced.

Pell Orrow

NPC

Rigmaster

A human engineer with a scorched beard, a cracked brass monocle, and a habit of placing his ear against the boiler casing before answering questions.

The Moving Store

Shop

General supplies

A cramped supply wagon stacked with water skins, coal oil, rope, pitons, repair kits, rations, and common adventuring gear. Prices rise sharply before storms, but the owner sometimes gives supplies to workers who have lost wages.

The Red Rivet

Shop

Forge and repair shop

A narrow wagon fitted with a hand-cranked forge and a cooling tank. The air tastes of metal and ash, while every hanging tool rattles in time with the crawler's movement.

The Tipping Cup

Tavern

Boiler crews, mechanics, salvagers, caravan guards, and anyone who wants to hear the day's rumors before the Charter Office edits them.

The tavern occupies two linked living-wagons braced with timber and iron cable. Tables are bolted to the floor, mugs hang from hooks, and the entire room sways whenever the crawler climbs a ridge.

The Blue Lantern

Tavern

Salvage factors, smugglers, visiting merchants, and security officers who prefer expensive drinks and quiet conversations.

This polished wagon is attached near the command gantry and lined with recovered glass panels. Its lanterns burn blue, its shelves hold imported spirits, and the door is guarded whenever the Salvage Line is moving contraband.

The Dredging Charter Office

Faction

Commercial authority

The Dredging Charter Office represents the rig's owners and controls permits, pay, salvage claims, and route priorities. It insists that all recovered material belongs to the charter holders.

The Boiler Hands

Faction

Worker collective

The Boiler Hands are machine-operators, fuel shovelers, repairers, and laborers who keep the crawler alive. Many are trapped by debt contracts and have learned that collective refusal is the only leverage they possess.

The Salvage Line

Faction

Salvage market

The Salvage Line consists of factors, brokers, smugglers, and antiquarians who purchase recovered objects before official inspectors can catalogue them. Its members claim they preserve history by keeping it out of bureaucratic vaults.

The Iron Treads

Point of Interest

Twin iron tracks taller than a person grind over the flats. Chains, maintenance ladders, and inspection hatches offer routes for climbers, saboteurs, and desperate stowaways, but every few minutes the machinery shifts with enough force to throw a creature prone.

The Mud-Hopper Deck

Point of Interest

A wide extraction platform crowded with suction pumps, hydraulic claws, brass gauges, and open settling vats. The deck is slick with mud and chemical wash, and newly recovered stone is sorted beneath awnings that snap in the wind.

The Boiler Room

Point of Interest

The crawler's deafening heart contains coal bunkers, pressure boilers, steam pipes, and cramped service passages. Heat radiates through the walls, tongues dry within minutes, and every conversation becomes a shouted fragment swallowed by the pistons.

The Salvage Line

Point of Interest

A chain of cargo platforms and modular wagons trails behind the main crawler. Salvage is catalogued here, though valuable pieces often disappear into false crates before official records are written.

The Rear Quarters

Point of Interest

A row of cramped living-wagons lashed together with iron cable. Hammocks sway above tool chests, children sleep through machinery noise, and every door bears a chalk mark showing which crew currently occupies it.

Calendar of Events

Every third day

The Cooling Pause

The rig halts for six hours so crews can cool the boilers, scrape packed silt from the treads, and conduct mandatory safety inspections.

The pause gives smugglers a predictable window to board or leave, but someone has recently begun altering the inspection ledgers.

Every seventh day

The Silt Auction

The Salvage Line auctions recovered masonry, metalwork, and minor magical curios to workers, caravan factors, and passing agents.

Several items are quietly marked with false descriptions because they belong to an imperial archive that someone wants removed from the Sultanate.

The next full moon

The Vault Opening

Rigmaster Pell intends to open a newly located canal vault before the next sandstorm season closes the eastern routes.

The vault is still occupied by forced laborers sealed inside by an earlier excavation collapse.

The first day of the next dust season

The Red Migration

The rig changes routes and begins deeper extraction along the edge of the Glass Spires of Al-Zahir.

The new route crosses a buried leyline conduit, and the crawler's navigation engine has started steering toward it without orders.

Secrets

The crawler is guided by a damaged ancient intelligence embedded in its navigation engine. It is seeking the buried remains of a canal network whose final control chamber lies beneath the alluvial plains. Learning this lets the characters predict its route, but stopping it may strand everyone in an approaching storm.

Settlement-wideThe characters notice that the navigation core's route changes whenever recovered imperial masonry is brought aboard.

The missing workers are alive in a sealed chamber with several debt-bound laborers who disappeared over the last year. Revealing this transforms a labor dispute into an immediate rescue and rebellion, forcing Hadrik Vale to choose between his orders and the people inside.

Boiler RoomA false bulkhead in the Boiler Room bears fresh scratches from the inside.

The recovered district was not abandoned. Its inhabitants were sealed underground during an imperial canal purge, and the crawler's excavation has begun opening their surviving refuge. The truth could bring Sultanate justice, imperial retaliation, or a desperate claim for sovereignty.

Salvage LineA bronze door in the Salvage Line carries an imperial seal beneath layers of chemical wash.

Rumors

The crawler can smell buried gold through solid stone.

Pell Orrow keeps a map that shows where the rig will go next, but the route is written in someone else's handwriting.

The missing boiler workers were sold to a glass-steel foundry near Al-Zahir.

A Sultanate inspector has already boarded the rig under a false name.

The oldest treads are stamped with the seal of an imperial army unit that vanished during the Sundering.

At night, the crawler turns its front lamps toward empty ground and waits.

Plot Hooks

Voices Behind the Bulkhead

Mara Venn asks the characters to enter a maintenance crawlspace and rescue missing boiler workers before the next shift change. The workers are alive, but one of them has bonded with an ancient control device and may not survive removal.

Rescue and labor revoltMara Venn300 GP, safe passage on the crawler, and the lasting loyalty of the Boiler Hands.

The Storm Boarding

Pell Orrow offers the characters a share of the salvage if they stop raiders from hijacking the crawler during a sandstorm. The raiders are not after the rig's cargo. They are trying to prevent the crawler from reaching a buried district before its sealed inhabitants are exposed.

Vehicle defense and moral choicePell Orrow500 GP in salvage rights and access to the rig's command gantry.

The Mark Beneath the Dust

Irena Bell hires the characters to inspect a route marker that appeared overnight. Following it reveals a buried imperial artifact, but also proves the marker was placed by someone inside the rig who wants the crawler redirected toward a leyline conduit.

Investigation and explorationIrena BellA recovered uncommon magic item and a copied map of hidden Verulanan canals.

Inspection Day

Captain Hadrik Vale asks the characters to keep order when Sultanate inspectors arrive. The complication is that the inspectors carry lawful authority but have been instructed to seize every worker who can testify about forced labor and artifact theft.

Social crisis and faction conflictCaptain Hadrik ValeA writ of safe conduct through the Sultanate and 250 GP from Hadrik's private savings.

The Part That Thinks

Sella Quist offers a powerful device if the characters recover one missing component from the Boiler Room. The component is part of the navigation core, and removing it will stop the crawler from moving just as a glass-dust storm approaches.

Sabotage and survivalSella QuistA functional uncommon magic item, plus repair supplies worth 200 GP.

Visual sheet

Turn The Crawling Silt-Dredge, Excavation Rig Nine into a sheet

A high-res, share-ready sheet you can post or print.