d100 Construction Delays for your Bastion or Stronghold

I heard a utuber say they would like something like this.

They could hit price and time of construction (especially if a government-funded project with private contractors). Some of these are actually interesting or good so not a complete drag to roll here.

d10
1 Geological

2 Weather

3 Hirelings

4 Sabotage

5 Materials

6 Political

7 Discovery

8 Attack

9 Supernatural

10 Cosmic

d100 Construction Delays for your Bastion or Stronghold
01 FInd a natural cave complex needs exploring or can just seal up

02 Discover soft substrate will need some extra foundations +10% or it will sink over time

03 DIscover a deposit of d4 1=metal 2=coal 3=marble 4=clay 

04 Gas floods underground construction d4 1=poison 2=flamable 3=smoke 4=irritant

05 Find a spectacular natural geode crystal chamber with a skeleton inside

06 FInd an underground water source could be good for a well or just seal it

07 Find petrified bones and remains of ancient monsters

08 Find a cave with a heated grotto nice for relaxing in with huge crystals

09 Boiling pool of d4 1=lava 2=mud 3=sulphur 4=nitrites

10 Discover a cold underground cave with ancient paintings on the walls of some sacred complex with bones of prehistoric creatures
11 Storms damaged the work site and workers settlement d4 times in a month +10% time and cost

12 Flash flood or heavy rains damages site and causes some mud slides +10% time and cost

13 Lightning strike sets alight scaffolding and wooden items on site +10% time and cost

14 Fog blankets work site and labour camp slowing movement +10% time

15 Constant rain, sleet, hail or snow slows work +10% time

16 Lightning shatters a major part of construction +10% cost

17 Weather triggers a mud slide or avalanche that damages site, workers' camp or road +10% time and cost

18 SInister clouds, lightning and bad weather scare workers who believe project is cursed and want to stop work

19 An evil face appears in the sky and clouds and scares workforce who want it stopped

20 Migrating monsters decide the work site is a good place to stop for a bit

21 Workers complain about terrible food making them ill

22 Workers complain od giant d4 1=ants 2=rats 3=badgers 4=carniverous moles 

23 Workers want entertainment in their camp 

24 Turns out a major expert has become senile or is a fraud +10% time and cost

25 Major expert adds a secret entrance or hiding place for nefarious reasons 

26 Workers sneak off to go adventuring in local d4 1=ruin 2=cave 3=dungeon 4=haunted manor

27 Slavers kidnapped some of your workers

28 A troublemaker has come to recruit your workers to another job site

29 Some creature visits the camp at night d4 1=doppelganger 2=shadows 3=succubus 4=ghouls

30 Workers fighting about alignment in camp after work and forming factions
31 Enemy bribes workers to leave the site

32 Bard arrives to gossip and sing about the terrible deeds of the boss and what this is "really for"

33 Cultist uses a rock to mud scroll to sabotage the work site +10% time and cost

34 Cultist infiltrates workers and tries to get them to join evil cult

35 Small humanoids burrow under the site causing damage +10% time and cost

36 Lots of accidents on site until saboteurs from enemies is stopped

37 Cultists use curses and spells to cause trouble with workers who are scared

38 One of the workers is a werewolf probably best to sop them before workers leave

39 Some deceased workers arise from dead and menace the crew making them want to abandon the work. An evil priest, cult or necromancer are to blame

40 Arsonist on site destroys lumber, scaffolding and carts 

41 Shortage of quality stone need a new quarry or supply

42 Some creature harassing the woodcutters chopping wood for the project

43 We need lots of sand from a new quarry

44 Turns out some of the rubble used for landfill were old headstones of a previous civilisation

45 Elves and treants are disrupting local wood supplies

46 The local quarry has been overun by kobolds and the masons cannot work

47 Some creatures in the clay pits are stopping the local potters and tilers and brickmakers

48 A rust monster destroyed a shed full of nails and tools and might come back

49 Local wells have gone dry and we need water brought to the site if they don't flow again

50 Local prison governor can supply cheap non-guild labour -10% but upset the guilds
51 Rival noble dislikes the project and appeals to the ruler to stop it

52 Rival noble wants major road moved away from your domain

53 Rival noble wants the property and tries to frame the owner with a fake treason plot

54 Rival noble claims your not paying your taxes to the ruler and you have vast hidden wealth

55 Ruler wants to visit so hurry up to receive them, maybe you can bribe their chamberlain to delay the visit few seasons

56 A faction wants you onside, if you reject them you are their enemy

57 A faction believes your property is a threat and send spies to work on it

58 An enemy power thinks obtaining your property will be part of their invasion or attack

59 A cad comes to join your followers to rob and steal from treasury or art objects

60 A competent stranger arives to serve and is really a spy for the ruler
61 Discover an ancient sealed monumental tomb for d4 1=druid 2=king 3=wizard 4=holy leader

62 Discover ancient tunnels of dwarf civilisation that connected the land by vast underground highways long ago

63 Discover the site of an ancient temple destroyed for evil ways, The sub-levels were sealed generations ago

64 Discover ancient mine tunnels including a shrine and some graves and stone tools

65 Discover a forgotten dungeon left centuries ago and covered by disaster

66 Discover prehuman ruins and chambers sealed with wards long ago

67 Discover a tunnel system with ancient graves in niches from long ago

68 Discover remains of vast stone monument now buried d6 1=ziggurratt 2=mousoleum 3=fallen statue 4=great temple complex 5=sphynx 6=haunted palace

69 Discover cave trade route used long ago between surface and underland folk

70 Discover access to a traversable underground river at the bottom of a vast rift it has carved over aeons. Home to giant fish, bats, bugs, prehistoric albino marine dinosaurs and giant axolotl
71 Goblinoid raiders attack camp to steal food and tools while workers away

72 Orc raiders come to enslave workers and burn everything

73 Bandits raid your work camp and supply wagons

74 Barbarian raiders come to rob and kill on a raid

75 Vile beast folk serving a witch raid your work site and take workers

76 Robed cultists try and kidnap workers to sacrifice constantly for their hungry god

77 Mysterious masked riders sent by a secret faction to stop your project wreck the site and scare workers

78 Monsters keep raiding the site and are being directed by some mysterious boss

79 Someone summoned a monster from another plane to attack and may try again

80 Undead came from the woods at night and attacked the workers' camp. They were sent by a d4 1=cult 2=mummy 3=necromancer 4=vampire
81 A mysterious singing spirit has been trying to lure people into the wilderness by night

82 People have heard screeching and moaning sounds at night and a fearsome supernatural being is causing trouble d4 1=nature spirit 2=hag 3=banshee 3=vengeful spectre

83 Local scruffy old madman decrees this site has not been blessed by some long-forgotten earth cult and people are starting to believe him

84 People have had dreams in the worker's camp and some believe some spirit is trying to make contact or investigating

85 Local witch sends doppelgangers and undead that pretend to be human to spy on the workers. A few people have disappeared and possibly replaced

86 Traces of cult paraphernalia of outdoor rituals are being found often and it seems more than just the usual druidy stuff

87 Workers find a haunted witch house near the camp and work site

88 An ancient golem has awakened as if angered by the building site has been causing trouble. It is pre human and responds to some long-gone threat like a good automaton

89 Ghost seen at night moaning about something angrily, workers want an exorcist called

90 A dark monolith things come to worship under the full moon
91 A prophet predicts some great world event will take place here

92 A petty god visits, possibly will just pass but look out it it is made mad

93 An elemental node is discovered in the area sealed long ago and connects with another plane. If opened a guardian comes out to protect it

94 Found the decaying flesh of some vast alien god killed aeons ago

95 Find a location marked by a famous hero d4 1=saint 2=knight 3=wizard 4=fool  

96 Find remains of an ancient broken portal once on the surface

97 Find a long lost treasure horde and among it are some famous artworks and a troublesome artifact

98 Find a lost holy shrine with some unusual power that is mentioned in holy texts. A famous religion believes finding this shrine is of special significance 

99 Disturb an ancient barrow ling grave and a revenant with an ancient crown of this land arises to fight the new-coming ruler. The crown imbues wearer with link to the land allowing them to arise as a revenant if dead and also speak with dead three times a day

100 An ancient prehuman stone vault is discovered sealing in some minor divinity or entity of the outer void