SCP-684 — SCP-684 | Cost Breakdown

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SCP-684 Euclid ~ medium confidence

SCP-684

Expected annual

$238.3M

One-time setup

$2.0B

Annual recurring

$222.5M

Personnel

100

Initial capital outlay is approximately $1.97 billion driven by ships/submersibles, munitions, contingency reserves, and sensor infrastructure; ongoing operations run roughly $222.5 million per year dominated by vessel operations, personnel, and cover/legals.

🏗️ One-Time Capital Costs Total: $2.0B

Escalation Contingency Reserve $1.1B

[#25] Recommended contingency reserve for catastrophic escalation / containment failure (scales with response plan).

Equipment $413.0M

[#4, #5, #6, #17, #22] Procurement/retrofit of patrol/support vessels $150M, deep-submersible and mothership $55M, ROV/AUV fleet $30M, HotBox deterrent munitions procurement $175M, on-prem data processing hardware $3M.

Coverup One Time $150.0M

[#15] Initial diplomatic/indemnity/cover agreements and one-time legal/compensation payments.

Replace Existing Manned Stations $125.0M

[#10] Optional capital to replace existing manned stations (single-event replacement cost estimate from note).

Facilities $83.0M

[#1, #13, #21] Perimeter sensor installation (moored buoys/seafloor nodes) $60M, fiber/relay installation $15M, secure facility/SCIF buildout $8M.

Remediation Reserve $50.0M

[#19] One-time environmental remediation reserve for potential kinetic/chemical responses.

Initial Research And Lab Setup $30.0M

[#8] High-containment wet-lab build-out and outfitting for sample analysis $30M.

Cover Program Seed $20.0M

[#29] Seed funding for public-facing cover research programs and plausible deniability projects.

Training Curriculum Setup $500K

[#12] Initial training/psychological program and deception-management curriculum/materials.

🔄 Annual Recurring Costs Total: $222.5M/yr

Logistics And Transport $80.0M/yr

[#3] Charter/operation of dedicated patrol and support vessels (fuel, crew, port calls, maintenance) — dominant recurring cost.

Facilities Maintenance $28.0M/yr

[#2, #10] Perimeter sensor node maintenance (battery swaps, biofouling cleaning, replacements) ~$7M plus replacement/repair budget for prefabricated stations and secure facility operations (aggregate).

Research And Monitoring $22.5M/yr

[#5, #7, #9, #19, #22] Submersible operations $5M, ROV/AUV operations $5M, lab operations and specialized research staff $6M, environmental monitoring $5M, data processing/modeling recurring costs $1.5M (rounded into research/monitoring aggregate).

Cover Story And Legal $20.0M/yr

[#16] Annual hush payments, port access fees, legal retainers, covert diplomacy and ongoing cover-up costs.

Deterrent Ops Maintenance $20.0M/yr

[#18] Munitions maintenance, storage, practice drills, rearmament and associated safety protocols.

Staff Wages $12.0M/yr

[#11] Salaries for scientists, technicians, AUV pilots, analysts, intelligence/cover staff and baseline project personnel.

Insurance And Indemnity $8.0M/yr

[#23] Insurance premiums, indemnity funds, and self-insurance reserves for covert contractor operations.

Supplies And Consumables $6.0M/yr

[#24] Routine consumables for ships, buoys, labs, batteries, replacement electronics, ropes/anchors, fuel line items.

Cover Program Maintenance $6.0M/yr

[#29] Ongoing funding to sustain public-facing cover research programs and plausible-deniability outputs.

Public Safety And Shipping $5.0M/yr

[#27] Liaison with maritime organizations, shipping reroutes, notifications, and compensatory payments.

Administrative Overhead $5.0M/yr

[#28] Project management, classified procurement accounting, audits, and internal overhead for covert operations.

Personnel Replacement And Recruiting $3.0M/yr

[#26] Recruiting, background checks, replacement training pipelines, and settlement funds for affected dependents.

Hazardous Material Handling $2.5M/yr

[#20] Secure decontamination, incineration, and hazardous-waste disposal contracts for assimilated residues and contaminated samples.

Training And Psych Programs $2.0M/yr

[#12] Ongoing training, psychological screening, counseling, and deception-management staffing.

Secure Communications Recurring $1.5M/yr

[#14] Satellite leases, bandwidth, uplink subscriptions, and replacement of comm hardware.

Legal And Ethics Board $1.0M/yr

[#30] Legal/ethical review board and medical oversight for classified human-subject issues.

⚡ Cost Scenarios

📊 Baseline (baseline) $222.5M/yr

90.0% probability / year

Normal year with routine operations, maintenance, and cover activities; no major incidents.

no_breach routine_operations scheduled_maintenance

🚨 Minor Incident $232.5M/yr

8.0% probability / year +$10.0M vs baseline

Localized loss/damage to nodes or a single station assimilation requiring repair/replacement and legal/cover actions.

localized_assimilation sensor_loss small_vessel_response

🚨 Major Breach $972.5M/yr

2.0% probability / year +$750.0M vs baseline

Containment failure / large-scale expansion requiring major naval response, large remediation/cover operations, and expedited replacements.

large_scale_expansion multi-station_assimilation international_exposure

👥 Personnel 100 total

Role	Count	Notes
Research Scientist	20	[#11, #9] Marine biologists and researchers conducting sample analysis and studies.
Lab Technician	15	[#11, #9] Wet-lab techs, BSL operations, sequencing and sample prep.
AUV/ROV Pilot/Technician	15	[#6, #7, #5] ROV/AUV pilots and maintenance techs supporting unmanned and manned sub operations.
Security Officer / MTF Agent	20	[#3, #11] Vessel and perimeter security, enforcement of exclusion zone, and rapid response teams.
Engineer / Maintenance	10	[#1, #2, #13] Sensor array, comms, and ship/structure maintenance staff.
Administrative Staff	10	[#28, #11] Program management, logistics, finance, and procurement accounting.
Medical Officer	3	[#11, #30] Medical oversight and clinical support for offshore personnel.
Site Director / Executive Staff	2	[#11] Executive oversight, strategic decision-making, and liaison with higher Foundation command.
Intelligence / Cover Staff	5	[#15, #16, #29] Staff managing cover stories, diplomatic contacts, and covert liaison with external entities.

📋 Confidence Notes

Analyst notes provide detailed line-item ranges and clear drivers, but large parameter uncertainty remains (policy choices on charter vs. purchase, deterrence posture, and escalation magnitude), producing moderate confidence in point estimates.

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