Port of Baltimore Maritime Infrastructure & Navigation Risk Analysis

Research boundaries. This independent USPA publication analyzes publicly documented maritime incidents, federal findings, port operating conditions and proposed controls. It is not a Coast Guard determination, bridge-engineering certification, vessel survey, pilotage instruction, commissioned site assessment or statement that USPA has inspected restricted port assets. The analytical scenarios are hypothetical unless explicitly identified as historical. Operational standards, tug assignments and navigation restrictions must be confirmed with the responsible authority, vessel master, pilots and qualified engineering professionals before use. The author is Michael Evans Jr., Associate Manager of Maritime Operations, a separate person from USPA founder Michael Evans.

Executive Abstract

The destruction of Baltimore's Francis Scott Key Bridge on March 26, 2024 remains a defining modern case of how a localized shipboard failure can become a regional transportation emergency. The 984-foot containership Dali experienced electrical power failures, lost propulsion and steering near the bridge, struck Pier 17, and brought down the central span. Six highway workers were killed. The National Transportation Safety Board's final report, released November 18, 2025, identified a loose signal-wire connection stemming from improperly placed wire-label banding as the initiating cause of the blackout, with the available recovery time, bridge vulnerability and warning limitations contributing to the outcome. ^S01S02

The Coast Guard subsequently conducted a broader Ports and Waterways Safety Act Board of Inquiry (BOI) examining risks to critical port infrastructure from larger commercial vessels and evolving traffic. Its September 4, 2026 release describes assessments of 11 ports, engagement with 41 Captain of the Port (COTP) zones, and 20 recommendations for systemic improvement. The Coast Guard invited stakeholder comments through February 28, 2027, before an anticipated August 2027 Commandant's Final Action Memorandum. Those dates govern a federal review process; they do not, by themselves, impose new universal tug-escort or bridge-retrofit obligations on private operators. ^S03S04

This monograph examines Baltimore as an interconnected system of vessel propulsion, electrical power, pilotage, navigation-channel dimensions, bridge vulnerability, berth operations, traffic management, salvage capability, highway warning and emergency command. Its organizing question is how to identify a failure early enough to preserve a practical response option, particularly when a large vessel has already acquired momentum in confined waters. An 800-foot federally authorized Fort McHenry Channel, historically maintained at 700 feet wide and 50 feet deep, illustrates why authorized, maintained and operationally available dimensions must be distinguished. Larger ships increase the value of systematic review, although vessel length or TEU capacity alone cannot determine collision probability. ^S05S06

The report provides an evidence hierarchy; a navigation and infrastructure dependency model; a 12-scenario prospective risk register; a method for comparing engineering, tug, communications and organizational controls; and a 90-day stakeholder preparation program. It evaluates pier protection and vessel escort as site-specific engineering and regulatory decisions, with explicit attention to feasibility, capacity, unintended navigation effects and evidence quality. This research is intended for maritime operations leaders, port facility executives, bridge owners, pilots' organizations, Harbor Safety Committees, insurers, General Counsel and public authorities considering how to translate the inquiry's findings into defensible action.

1. Evidence Architecture and Research Boundaries

Four distinct evidentiary records shape the analysis. The NTSB's casualty investigation establishes the mechanics and probable cause of the Dali allision. The Coast Guard's separate Ports and Waterways Safety Act inquiry addresses the wider problem of port and waterway risk identification. The Army Corps, Maryland Transportation Authority (MDTA), Maryland Port Administration (MPA) and other public authorities supply channel and infrastructure information. Finally, technical models and prospective exercises support decision-making without asserting that an identified weakness exists at any named operating facility. ^S01S03S05S07

Table 1. Evidence hierarchy and publication treatment

The public inquiry is relevant beyond Baltimore, but its findings cannot be mapped mechanically to every port. Traffic mix, passage geometry, tug availability, bridge form, spill-response resources and pilotage rules vary. A credible comparison requires a defined geographic boundary and up-to-date local evidence. When a document cites port risk as high, the underlying basis should identify the asset, time period, initiating mechanism and consequences being evaluated. Otherwise, a generalized label obscures the management decision it is supposed to support.

The present research does not include proprietary bathymetric surveys, the exact current vessel escort tariff, bridge structural calculations, insurance values, real-time AIS tracks or confidential facility security plans. It also does not resolve liability in pending legal proceedings. Those limitations determine which recommendations can be framed as actionable requests for further study and which conclusions require independent verification. An internal evidence ledger accompanies the publication so that qualifications from the original research brief remain visible during editorial approval.

2. The Dali Casualty and the Wider Coast Guard Inquiry

The Dali event occurred in the early hours of March 26, 2024 while the vessel was outbound from Baltimore. The vessel lost electrical power and essential machinery functions as it approached the Key Bridge; its bow struck the supporting pier, bringing portions of the bridge down onto the ship and into the Patapsco River. The NTSB's completed investigation identifies the initiating electrical fault and discusses additional shipboard recovery, safety-management, bridge-protection and communication issues. That record should anchor statements about the accident's mechanism. Earlier preliminary reports were necessarily less complete and should not supersede the final findings. ^S01S02

The Coast Guard's Ports and Waterways Safety Act inquiry had a different task. It examined how port authorities and maritime stakeholders recognize changing risk as vessel characteristics and traffic patterns evolve. The 2026 public release reports assessments of 11 ports, feedback from 41 COTP zones and 20 recommendations. Its primary recommendation themes include revising Coast Guard risk-assessment policies and tools, defining marine transportation performance metrics, developing specialized workforce capacity and improving coordination with stakeholders. Public comment closes February 28, 2027; the Commandant's Final Action Memorandum is anticipated in August 2027. ^S03S04

Table 2. Two investigations, two kinds of conclusion

A third strand must remain separate: the May 12, 2026 Department of Justice indictment concerning the Dali involved allegations against corporate entities and an individual. An indictment is an accusation, and the defendants are presumed innocent unless proven guilty. Criminal allegations should not be presented as adjudicated facts or substituted for the NTSB's engineering findings. ^S18

3. Maritime Geography: Authorized Channel, Maintained Channel and Operating Envelope

The Fort McHenry Channel is part of the Baltimore Harbor Anchorages and Channels federal project. Army Corps material describes a channel authorized at 800 feet in width and 50 feet in depth; the waterway has historically been maintained to 700 feet wide and 50 feet deep. The Corps announced restoration of its operational dimensions of 700 by 50 feet on June 10, 2024 following removal of bridge debris. The numbers have distinct meanings. Authorized width reflects the federal project, maintained width describes the dredged navigational corridor at the stated time, and the usable width available to a particular ship may be constrained further by draft, turning geometry, tide, current, separation requirements and temporary restrictions. ^S05S06

An analyst should avoid treating 700 feet as the precise usable lateral clearance for every transit or as evidence that a large ship is automatically unsafe. Vessel beams, hydrodynamic characteristics, bank proximity, traffic meeting arrangements and the position of navigational structures affect available maneuvering room. Local notices and current hydrographic information, together with the judgment of licensed pilots and masters, govern actual movements. Hydrodynamic effects commonly described as squat, bank suction and bank cushion become increasingly relevant in restricted water but require vessel-specific and condition-specific analysis. ^S16S17

Table 3. Channel geometry and the data necessary for a real transit assessment

A vessel's nominal capacity in twenty-foot equivalent units (TEUs) is an imperfect proxy for bridge-impact severity. TEU rating is a cargo-capacity measure. The impact consequences depend on vessel mass, speed, approach geometry, structural interaction and whether protection systems successfully redirect or dissipate energy. In risk analysis, ship class is one input to a measured and modeled operating envelope; it is not itself a probabilistic failure rate.

4. Shipboard Electrical Failure and the Causal Chain

The NTSB's findings support a precise account of the initiating failure: wire-label banding interfered with the insertion of a signal wire into a terminal block, leaving a loose connection. The resulting electrical disturbance led to the blackout sequence and loss of propulsion and steering when the ship was near the bridge. The report also examined the arrangement of diesel-generator fuel service, recovery from the blackout and the ability of emergency systems to support essential functions. Those are interacting issues, although they should not be compressed into the assertion that every ship has a single nonredundant electrical system. ^S01S02S19

Engineering response time is important because control systems can be restored after the remaining maneuvering window has closed. Once a ship is moving toward fixed infrastructure, restored electrical supply may not immediately deliver usable thrust, steering effect or the heading change needed to avoid impact. The degree to which the rudder can alter the vessel's course depends on water flow, propulsion configuration, inertia and local hydrodynamic conditions. A high-priority assurance question is therefore whether a critical failure produces a recoverable state within the distance and time remaining, accounting for human recognition and response.

Table 4. From equipment fault to public consequence

This chain is useful because it identifies multiple opportunities to stop escalation. Maintenance quality cannot eliminate every unforeseeable fault; bridge design cannot prevent every vessel deviation; and emergency communications cannot always provide sufficient clearance time. A safety argument becomes stronger when several independent controls address distinct stages of the same outcome, with their limitations acknowledged rather than hidden.

5. Propulsion Recovery, Emergency Power and Machinery Dependencies

Power-system resilience should be evaluated functionally. A vessel may have multiple generator sets while retaining a common dependency in fuel supply, switchgear, control circuitry or auxiliary machinery. The Dali investigation examined its main engine, generator fuel configuration, switchboards and emergency equipment as parts of the recovery sequence. The essential distinction is between equipment redundancy on paper and function-level survivability during a credible loss-of-power event. ^S01S19

For an operator's technical review, the appropriate questions concern the independence of critical power paths, the availability of steering under degraded conditions, the time to restore propulsion safely and the potential for a recovery action to cause a second disturbance. Such testing must take place under a marine engineering safety-management program; public research should not prescribe live-switchboard manipulation or unvalidated control changes. It is more productive to request documented test evidence, approved contingency procedures and crew training records than to extrapolate another vessel's specific wiring failure to the regional fleet.

A useful indicator is time to safe maneuverability under a defined failure case. This differs from time to first electrical restoration. It measures how long passes before the vessel can achieve the rudder response and controlled propulsion necessary to execute the emergency plan. The metric requires a defined operating state, competent technical testing and verification against actual shipboard equipment. A table of recovery times has little meaning without the loading conditions, ship speed and environmental assumptions under which it was measured.

6. Restricted-Water Hydrodynamics and the Margin for Recovery

Large-ship momentum limits the effectiveness of late interventions. At a high level, vessel translational kinetic energy is proportional to one-half mass multiplied by velocity squared. The relationship illustrates why speed matters sharply when an impact becomes unavoidable, but it does not predict actual pier damage without impact geometry, hydrodynamic added mass, structure response and energy absorption. The relevant energy cannot be calculated reliably from TEU capacity alone. ^S01S16

Bank effect, squat, current and vessel interaction contribute additional uncertainty in narrow channels. Their severity varies with hull form, draft, speed, depth ratio and cross-sectional geometry. A pilotage assessment should consider whether an emergency action available in open water remains effective when channel edges, other traffic or fixed structures narrow the choices. Reassessing safe speed and available separation may increase usable decision time, yet slower speed can also alter steerage response, schedules and tug effectiveness. Those tradeoffs require local expertise and simulation.

Table 5. Maneuvering-margin assessment variables

For illustration only, a vessel traveling at 8 knots covers approximately 4.12 meters each second. In 90 seconds it would move roughly 370 meters if its speed remained constant. This arithmetic demonstrates the scale of a response window; it does not represent an actual Dali decision interval or a recommended safe distance. The final casualty record should be used for the historical timeline, and any future operating policy must rely on competent navigational modeling.

7. Bridge Vulnerability and Structural Protection

The NTSB concluded that the Key Bridge's vulnerability could have been reduced through risk assessment and appropriate collision countermeasures. Its recommendations called for bridge owners to calculate annual frequency of collapse using the applicable AASHTO Method II approach and, when results exceeded the relevant threshold, prepare a risk-reduction plan. This is an engineering framework, which depends on traffic exposure, vessel characteristics, aberrancy probability and structural resistance rather than a single assumption that every bridge of a particular vintage is unsafe. ^S01S08S20

Protection measures include structural robustness, properly designed independent protective systems, navigational geometry changes and operating restrictions. Dolphins, fenders and other sacrificial or energy-dissipating elements must be evaluated against site-specific vessel impact conditions and secondary hazards. They can change the clearance envelope and create their own navigational constraints. A retrofit proposal should therefore examine foundation conditions, impacts on authorized navigation, permitting, environmental effects and maintenance obligations alongside nominal collision capacity.

Table 6. Bridge protection options and assurance requirements

The original brief's description of the former bridge as having no physical protection is too broad. The NTSB report documents existing dolphins and fender systems, while concluding the overall arrangements did not adequately protect against the collision conditions involved. That distinction matters for engineering credibility: the failure of a protection strategy can result from insufficient capacity or configuration despite the presence of physical components. ^S01

8. Replacement Bridge: A Different Geometry and an Evolving Project

Maryland's replacement program is a forward-looking control case, but details remain subject to design, procurement, permitting and construction change. Public MDTA documents describe a cable-stayed bridge with a 1,665-foot principal span, a minimum 230-foot vertical navigation clearance and substantial vessel-collision protection for the main pylons. Board materials also describe a minimum 1,100-foot horizontal clearance between planned pier-protection structures. These are proposed project parameters at the research cutoff, rather than evidence that the entire replacement structure is complete or its final protection has been operationally validated. ^S09S10S21

Construction itself introduces a transitional risk picture. Temporary marine work platforms, barges, crane operations, exclusion areas and altered traffic patterns can coexist with commercial transits. Safe passage therefore depends on timely notices, construction-phase coordination and clear assignment of the powers to stop work or restrict navigation. Building a stronger permanent structure cannot compensate for weak controls around temporary construction interfaces. The publication should track official project changes and distinguish design intent from installed and inspected systems.

Table 7. Replacement-project information requiring regular refresh

The correct planning question is how the temporary and permanent configurations change the navigation envelope during each phase, and how those changes are communicated. A published architectural rendering has limited value without the associated marine work sequencing, approved clearances and operational controls.

9. Terminal Operations and the Marine-Land Interface

The Port of Baltimore includes multiple terminal types whose consequences differ. MPA materials identify Seagirt as the major container terminal, operated under a long-term public-private agreement, with two 50-foot-deep berths for larger container ships. Public information on container operations also describes electronic terminal management links supporting vessel, trucking and cargo movement. Dundalk handles varied cargoes with different berth and landside dependencies. A single generic claim about 13 deepwater berths or uniform crane exposure should be verified against current terminal records before inclusion in a safety-critical assessment. ^S11S12

An infrastructure casualty can leave cargo equipment functional while cutting off access to sea or highway corridors. Conversely, a berth-specific mechanical or security event may affect the operator's productivity without requiring a channel closure. For these reasons, risk maps should trace the handoffs connecting vessel pilotage, berth allocation, terminal safety, tug availability, trucking, rail, customs clearance and emergency services. The relevant measure is the practical availability of a service under the specified scenario, rather than a broad claim that any disruption freezes all East Coast trade.

Table 8. Port of Baltimore dependency map

The analysis supports coordination among asset owners and operators while preserving their legal identities. MPA ownership of a public terminal, a private concessionaire's operating duties and the Coast Guard's navigation jurisdiction are related yet separate responsibilities.

10. WAMS, PAWSA and the Problem of Static Risk Reviews

The Coast Guard's 2026 BOI calls attention to underused waterways assessment methods and recommends revisiting policy and tools. Its conclusions should be read alongside the established Ports and Waterways Safety Assessment (PAWSA) program and localized waterway management processes. A Baltimore PAWSA workshop was conducted August 26–27, 2025, with participants describing navigation risk factors and potential mitigation strategies. The workshop report expressly states that specified participant views do not necessarily reflect an official Coast Guard position. ^S03S13S22

The originating brief cites a finding that 44 percent of 41 surveyed zones had no recorded Waterways Analysis and Management System review since 2015. Secondary coverage repeats a count of 18 out of 41. Because the full BOI annex and the exact denominator language require final editorial checking, that numerical assertion is withheld from the public executive findings here; it remains in the private claim ledger. It would also be misleading to equate an internal policy cadence with a universal statutory duty imposed on every port business.

Risk reviews become more useful when they track the inputs that are changing. Vessel size distributions, available tug capacities, channel condition, construction works, near misses, abnormal weather and response capability can be monitored between formal workshops. Data by itself is insufficient. The process needs a designated owner empowered to re-open an analysis when a condition crosses a pre-agreed threshold, while maintaining an auditable record of how a change affected the operating decision.

Table 9. Proposed dynamic waterway risk dashboard

An effective dashboard should disclose whether information is observed, modeled or merely anticipated. Its security-sensitive components belong in restricted operational systems; the public article describes the governance logic without publishing tactical details.

11. Vessel Growth, Fleet Mix and Exposure Assessment

The original Key Bridge was completed in the 1970s, when commercial ship dimensions and the configuration of regional trade differed materially from present conditions. The Dali was approximately 984 feet long. MPA information indicates that Seagirt is capable of serving larger container vessels, and published port materials describe capacity for ships of up to about 16,000 TEUs. Historical average ship-size statements require a defined dataset and cannot be inferred from isolated examples. ^S01S11S12

Risk depends jointly on vessel exposure and the vulnerability of the specific infrastructure in the path of a potential deviation. A rise in average ship size may increase the expected consequences of an impact even where the number of annual passages changes little. Conversely, improvements in vessel machinery, pilotage practices, bridge protection or traffic rules may reduce particular failure pathways. A defensible assessment separates traffic frequency, causal likelihood and conditional consequence, drawing on data matched to the waterway rather than using dramatic absolute claims.

The underlying records should identify vessel particulars, transit date and time, draft, tidal condition, pilotage arrangements and any restrictions relevant to the analysis. Public AIS datasets can inform trend research, but missing transmissions, classification errors and coverage gaps make them imperfect evidence for reconstructing individual incidents. Where high-consequence decisions are contemplated, qualified analysts should reconcile sources and document the uncertainty interval.

12. Tug Escorts as a Risk Control: Feasibility Before Mandate

Tug assistance can provide valuable maneuvering support during berthing, departure and other exposed movements. A proposal for an extended tethered escort should identify the hazard it is intended to address, the ship and tug performance envelopes, connection arrangements, crew safety, channel conditions and available alternatives. Effective escort power cannot be derived from the count of tugboats alone. Two tugs operating in an unfavorable configuration may offer less useful control authority than a properly specified arrangement, and a tether or line can introduce additional hazards. ^S01S15

The brief proposes mandatory dual-tug escorts throughout the restricted channel. That remains an option for regulatory and technical evaluation, not a rule established by the September 2026 BOI press release. Authorities should review local pilotage rules, vessel categories, COTP controls and the capacity of the tug fleet before imposing uniform requirements. The analysis should consider whether escorts are triggered by bridge proximity, ship dimensions, machinery status, particular environmental conditions or a combination of factors.

Table 10. Tug-escort option evaluation

A staged approach may yield greater value than immediate universal mandates: identify the highest-consequence transits; test escort scenarios in simulators; obtain pilot, tug-master and engineering feedback; then consider targeted operating limits or rulemaking through the responsible authorities. This is particularly important while replacement bridge construction affects the waterway environment.

13. Highway Worker Safety and Emergency Communication

The casualty caused six deaths among highway workers. The NTSB's final report describes a failure to provide sufficiently effective and immediate warning to those exposed on the bridge, even though prompt action helped prevent additional traffic from entering. Its recommendations address communication procedures and research into motorist warning systems that can detect dangerous vessel movements or bridge movement and stop road users before exposure. ^S01S08

Warning architecture should be assessed end to end. Detection must arrive early enough to support a decision; the decision must reach the traffic-control authority; warning devices must operate; and the closure or evacuation process must account for vehicles and personnel already on the structure. Communications to drivers, road-maintenance contractors and law enforcement may require different channels and acknowledgment procedures. Sensors and automated alerts need reliable testing, cybersecurity protections and a defined fallback when a component fails.

A system that provides an alarm after the last usable evacuation opportunity offers limited protection. However, there is no generally applicable time threshold that can be assigned to every bridge. A crossing with multiple entrance points, complex traffic and active work crews demands a local timing study and drills. Any proposed alert architecture must also address false alarms, which can disrupt emergency access and gradually undermine operator confidence when frequent or poorly explained.

14. Navigation Authority, Agency Responsibility and Legal Precision

The Coast Guard's Captain of the Port has broad authorities affecting vessel and waterway safety within the relevant jurisdiction. Applicable federal regulations, temporary zones and COTP orders can influence transit or access during a casualty or construction period. Pilotage requirements, vessel operating obligations and bridge-owner duties arise under separate legal instruments. An incident does not automatically become a formally designated Transportation Security Incident merely because a waterway is closed; the legal characterization depends on the event and applicable determinations. ^S03S14S15

The Ports and Waterways Safety Act inquiry does not itself create a direct obligation for a private company to install particular dolphins, purchase two escort tugs or run a named simulator course by August 2027. The Commandant's eventual final action may accept, reject, modify or assign further development to recommendations. Where changes require rulemaking, budgeting, permitting or formal policy revision, the implementation schedule must reflect those steps rather than treating an anticipated memorandum as automatically enforceable operational law.

Table 11. Authority and accountability crosswalk

This crosswalk is a planning aid, not a legal opinion assigning duties in every factual circumstance. Counsel and the cognizant authorities should confirm the exact statutory and contractual responsibilities applicable to a proposed project.

15. Berth Interface, Pilot Handoffs and Traffic Coordination

A safe ship movement begins before the vessel leaves its berth. Vessel readiness, pilot boarding or assignment, tug scheduling, terminal clearance, weather limits and the anticipated traffic picture are linked operational decisions. A changed berth time can alter tug allocation and crossing opportunities; a sudden machinery alarm may make a previously approved transit plan obsolete. Interface errors are particularly important where multiple organizations maintain different rosters and communication channels.

Documented handoffs reduce ambiguity. A departure checklist should identify who confirms machinery state, who validates the movement window, who receives local notices, and who can delay a departure if the vessel's condition changes. The vessel master and pilots retain their professional responsibilities, and port-side security or logistics staff must not assume authority to maneuver or order a ship's movement. The role of security and coordination personnel is to keep access, reporting and logistics functions synchronized with decisions taken by competent marine authorities.

A practical assurance model asks whether critical information is available to the next decision-maker in time to change an unsafe condition. Delays caused by unverified messages can matter as much as failures of electronic instrumentation. Requiring positive acknowledgment, clear escalation paths and periodic exercises can improve reliability without introducing detailed public disclosure of sensitive port communications.

16. Maritime Physical Security and the Limits of Contractor Roles

The Port of Baltimore's navigation risk is closely connected to physical access, cargo handling, maintenance activity and the reliability of incident reports. Security personnel may observe abnormal waterside conditions, control access to regulated premises, verify authorized contractor entry and preserve contemporaneous records of a disruption. Those contributions support the wider safety system but do not replace engineering inspection, pilotage, vessel safety management or Coast Guard powers. ^S23

For a private contractor such as USPA, the appropriate public claim is limited to services documented by the company: maritime gate and perimeter duties, credential checks where authorized, waterfront patrols, incident reporting and coordination with the client's Facility Security Officer under the applicable security plan. Any mention of an actual Port of Baltimore engagement requires a verified client relationship. This report does not represent that USPA has inspected the former Key Bridge, the replacement project, Maryland pilotage practices or any confidential port-security configuration. ^S23

Security work can help identify discrepancies between scheduled and observed activities, especially when temporary construction staff, specialized maintenance teams and delivery vehicles interact at constrained waterfront sites. Escalation procedures should specify the boundary between a contractor's observation and an official decision to restrict movement. Accurate logs, prompt notification and secure retention of records matter most when the events they document are later reconstructed across several organizations.

17. Environmental, Salvage and Fire-Response Dependencies

The Dali casualty generated a complex recovery operation in which removal of wreckage, stabilization, environmental precautions and navigation restoration depended on specialized assets and interagency command. The Army Corps announced restoration of the Fort McHenry Federal Channel to its original operational dimensions on June 10, 2024. The fact that the channel was reopened does not diminish the need to examine how salvage staging, wreckage removal, response logistics and resource dependencies influenced the reopening timeline. ^S06S24

A navigation casualty may coincide with fuel releases, submerged debris, fire, vessel instability and access constraints. Effective contingency planning therefore spans marine firefighting, oil and hazardous material response, salvage contracts, medical transport and the ability to isolate affected areas. The scope and duration of a restriction should be grounded in the actual event and the COTP's directions, rather than described in advance as the shutdown of the entire East Coast's freight system.

The resource analysis should identify mobilization time, equipment capacity, weather limitations, alternate staging locations and command interfaces. A contractor list without verification of availability gives little assurance in a multi-casualty event. Exercises should test scenarios in which the primary salvage or firefighting contractor is occupied elsewhere and the next available resource must travel from outside the immediate region.

18. Incident Command, Notification and Decision Latency

Major maritime incidents activate multiple organizational chains at once. The Coast Guard, state transportation agencies, harbor responders, terminal operators, police, fire services, environmental authorities and cargo stakeholders may each hold different information and powers. The challenge is transferring verified facts to the authority that can act on them before a reversible condition becomes irreversible. ^S01S03S24

Diagram 1. Illustrative notification architecture (no operational channel assignments)

VESSEL / PILOT OBSERVES NAVIGATION EMERGENCY
                    |
       Immediate marine distress and
       applicable waterway notification
                    |
                    v
      COAST GUARD / PORT RESPONSE CHANNEL
                    |
        +-----------+------------+
        |                        |
        v                        v
BRIDGE / ROAD AUTHORITY      TERMINALS / HARBOR
Traffic warning and         Vessel coordination,
worker protection           access and resources
        |                        |
        +-----------+------------+
                    v
        UNIFIED RESPONSE / RECOVERY
   Event log, control decisions, validated
       public warnings and restoration

The diagram describes functional relationships rather than a replacement for the region's actual emergency contact tree. Personnel should use approved channels and current contact information. After an event, analysts should reconstruct when the first signal was received, whether it was understood, who acknowledged it and when the response action occurred. This timeline exposes handoff delays that a generalized after-action statement may overlook.

Table 12. Decision-latency record for incident exercises

A numerical target for each interval must be derived from local engineering and response analysis. This publication does not invent an emergency-clearance time or prescribe actions outside the chain of authority.

19. Port Continuity, Economic Exposure and Secondary Effects

The bridge collapse illustrates the breadth of indirect loss. Highway users encountered detours, freight flows required alternate routing and maritime cargo handling was constrained while debris blocked the main channel. The NTSB documented the bridge's role in regional mobility and hazardous-material transport; the Army Corps documented subsequent restoration of navigability. These are separable effects with different recovery clocks. ^S01S06

A continuity assessment should distinguish direct infrastructure damage from interruptions to navigation, terminal throughput, road access, rail movement, workforce access and customer commitments. The duration of any one function's disruption is influenced by alternative routing and capacity. For cargo owners, contractual notice and demurrage exposure may become material even when their own facilities remain physically unharmed. For regional responders, alternate road access and hazardous-material route restrictions may influence deployment times.

Economic figures can be dramatic but should not be combined without eliminating double counting. The value of cargo delayed, terminal revenue not earned, bridge replacement cost and regional productivity loss use different accounting boundaries. The current research avoids publishing a single aggregate monetary estimate in the absence of a specified model, baseline period and supporting dataset. A competent resilience analysis should show the assumptions behind its figures and provide sensitivity bands for uncertain disruption duration.

20. Expanded Maritime Risk Register and Compound Scenarios

The prospective risk register includes 12 hazards across shipboard systems, navigation, infrastructure, communication, workforce and recovery. These are planning scenarios, not reported vulnerabilities at any particular active facility. The companion CSV assigns each scenario an accountable review owner, proposed control, evidence test and trigger for reassessment. Rather than assign unsupported 1–5 probability claims, the manuscript ranks analytical priority by consequence type and evidence sufficiency. Site-specific quantification belongs to qualified owners using measured exposures and approved methods.

Table 13. Twelve-scenario public planning register

Illustrative compound exercise A — Electrical failure and bridge proximity. An outbound ship is operating under an approved movement plan when critical machinery alarms indicate a loss of effective propulsion. The bridge team contacts the proper maritime authority and requests assistance while the shore-side parties activate the approved road and work-zone warning procedures. The exercise tests whether the relevant warning arrives before the last feasible protective action. No time, tug configuration or vessel behavior is asserted to represent a real Baltimore ship.

Illustrative compound exercise B — Marine construction and adverse conditions. A large vessel passage coincides with temporary waterfront works and a forecast of deteriorating visibility. The construction coordinator, vessel operator and competent port authorities must reconcile current restrictions, emergency staging and traffic conflicts. The exercise explores the risk that a work-site change is accurately recorded by one organization but is not reflected in the next movement plan.

Illustrative compound exercise C — Collision consequence and resource scarcity. A vessel contacts a fixed waterfront structure, generating debris and a potential environmental release. Salvage equipment is committed at another location, and an alternative provider has a longer mobilization time. Participants must identify the authority for navigation restrictions, environmental priorities and transparent communications to cargo and highway stakeholders. The exercise assesses resource resilience and the quality of cross-agency decisions, without assuming a specified duration of closure.

21. Quantitative Risk Modeling, Sensitivity and Uncertainty

A quantitative bridge-collision study should separate exposure, probability of an aberrant vessel movement, likelihood of contact given the deviation, vulnerability of the structure to the contact condition and expected consequence. The AASHTO Method II framework provides a specialized engineering approach to annual collapse frequency. Public commentary should not replace its formal definitions with an improvised rating formula, and a 1–5 heat map should not be described as an empirical probability of failure. ^S08S20

For a screening exercise only, analysts can express event risk conceptually as the sum over vessel classes and operating states of transit frequency multiplied by conditional event probabilities and consequences. The equation below is schematic, not an implementation of the AASHTO calculation:

\[ R_{\mathrm{screen}} = \sum_i N_i\,P(A_i)\,P(C_i\mid A_i)\,P(F_i\mid C_i)\,L_i \]

Here, N_i is annual exposed transits, \(P(A_i)\) is the probability of a significant navigation aberrancy, \(P(C_i\mid A_i)\) is conditional contact probability, \(P(F_i\mid C_i)\) is conditional infrastructure failure probability, and L_i represents loss consequence in a consistently defined unit. Dependence between variables and common-cause failures can undermine a simplistic product model, so qualified analysis should consider sensitivity, uncertainty and event-tree consistency. The publication supplies no numerical values because credible values require validated local datasets.

Diagram 2. Defensive control chain

VESSEL CONDITION ASSURANCE -> NAVIGATION MARGIN
             |                    |
             +----> TUG / PILOT RESPONSE
                          |
            STRUCTURAL PROTECTION / WARNING
                          |
                 PUBLIC SAFETY OUTCOME
                          |
              RECOVERY / RESILIENCE PLAN

Consequence modeling also requires care. Damage to a bridge, injury exposure and the loss of navigation share an initiating event, but their units are different. A monetary sum may be suitable for defined financial exposures; human safety and environmental impacts may need independent criteria that cannot responsibly be traded off through a single scalar score. Decision-makers should receive the range of possible outcomes, the degree of evidence supporting each and the control options that remain feasible.

22. A Ninety-Day Stakeholder Preparation Program

The public-comment window for the Coast Guard BOI closes February 28, 2027. Stakeholders who wish to comment should distinguish experience-based observations from proposals requiring further technical study. The following ninety-day framework is an editorial recommendation to organize meaningful input; it is not an official Coast Guard submission template. ^S03

Table 14. Ninety-day preparation schedule

A useful submission states the operational problem, explains why existing processes may miss it, identifies a proposed policy or tool change and provides evidence that the proposed intervention would improve the outcome. For example, asking for updated risk-assessment triggers based on significant shifts in vessel classes is more useful than asserting that all ports must immediately adopt an identical tug policy. Support for a common framework should coexist with recognition of local pilotage, channel geometry and marine industry differences.

The Coast Guard release provides an email address for comments: BOIComments@uscg.mil. Before transmitting material, verify current instructions and avoid including confidential security plans, restricted network details or information protected by commercial agreements in a public submission. ^S03

23. Governance After the Expected August 2027 Action Memorandum

The anticipated Commandant's Final Action Memorandum represents a later point in the administrative process, not the automatic completion of nationwide safety reform. It may set out policy direction, studies, organizational responsibilities or further implementation steps. Some recommended changes may require separate formal action, regulatory analysis, procurement or partner agreements. Operators should monitor the actual final memorandum when released and update their risk register based on what was decided rather than what the 2026 inquiry suggested. ^S03

Diagram 3. Policy-to-implementation assurance loop

BOI FINDING / RECOMMENDATION (2026)
                |
   STAKEHOLDER INPUT (BY FEB 2027)
                |
  EXPECTED COMMANDANT FAM (AUG 2027)
                |
  ACTUAL POLICY / RULE / LOCAL ACTION
                |
  ENGINEERING + OPERATIONAL VALIDATION
                |
       MONITORING AND REASSESSMENT

The entity responsible for a control must keep the evidence of its continuing effectiveness. A new bridge fender needs inspection and maintenance. A tug escort rule needs capacity and safety monitoring. A sensor-based warning system needs periodic tests and staff proficiency. A navigational risk dashboard needs refreshed data and human judgment. Governance turns a design promise into a reliable operational practice by identifying who can act when performance degrades.

For USPA's own maritime programs, the relevant implications concern documented operator communications, reliable incident reporting, realistic contractor roles and the coordination of assignments involving regulated waterfront facilities. Those functions can support a customer's broader security and continuity planning, provided no private provider assumes the navigation or engineering powers assigned to public authorities and licensed maritime professionals.

24. Research Gaps, Publication Controls and Executive Conclusion

Several questions remain open. The public Coast Guard press release summarizes the 2026 BOI but is not a substitute for verifying each statistic and recommendation against the complete redacted report. Existing bridge-protection components, vessel dimensions and channel geometry must be represented accurately. Whether specific tug requirements should change requires independent hydrodynamic and operational assessment. Replacement bridge data may evolve during procurement and construction. Legal allegations connected to the Dali remain subject to the status of the relevant proceedings. ^S01S03S18

Publication controls should distinguish an independently authored analysis from an official technical approval. The article's byline must identify Michael Evans Jr. as USPA's Associate Manager, Maritime Operations and link to his own profile. It must never associate his authorship with his father's role as company founder or attribute senior marine engineering credentials or Coast Guard endorsements to him. The research is appropriate as a professional contribution under his name because its evidence, calculations, editorial review and limits are explicitly documented. It should not claim that he personally performed the casualty investigation or has been commissioned to audit the bridge replacement.

A mature waterway risk program must keep pace with changing ships, aging infrastructure, available emergency resources and the organizations that share control of a confined maritime environment. Baltimore makes the consequences of failed interaction visible. The Dali investigation identifies a specific technical sequence; the Coast Guard's later inquiry asks how a national risk-management framework should adapt to changing operating conditions. Together they offer a defensible starting point for evaluating bridge protections, navigation procedures, warning systems and institutional readiness, provided that every proposed intervention is tested against actual engineering and maritime authority requirements.

Glossary

Authoritative Citation Registry

Research note: Duplicate use of an official source under separate registry numbers identifies a different evidentiary application; Base44 may consolidate duplicate bibliography entries after preserving all inline references. No competitor is cited in the public source registry.