diff --git a/docs/PHASE_4_IMPLEMENTATION.md b/docs/PHASE_4_IMPLEMENTATION.md
index ca2fee69..df12f2d7 100644
--- a/docs/PHASE_4_IMPLEMENTATION.md
+++ b/docs/PHASE_4_IMPLEMENTATION.md
@@ -13,6 +13,33 @@ Successfully integrated `moderationReducer` and `useLockMonitor` into the modera
 
 ---
 
+## State Machine Architecture
+
+### Active State Machines
+
+1. **`moderationStateMachine.ts`** - Manages moderation workflow
+   - **Used in:** `SubmissionReviewManager.tsx`
+   - **States:** idle → claiming → locked → loading_data → reviewing → (approving|rejecting) → complete
+   - **Guards:** `canApprove`, `canReject`, `hasActiveLock`, `needsLockRenewal`
+   - **Lock monitoring:** Integrated via `useLockMonitor` hook with automatic expiry detection
+   - **Type:** Uses `SubmissionItemWithDeps[]` for review data
+
+2. **`deletionDialogMachine.ts`** - Manages account deletion wizard
+   - **Used in:** `AccountDeletionDialog.tsx`
+   - **States:** warning → confirm → code
+   - **Guards:** `canProceedToConfirm`, `canRequestDeletion`, `canConfirmDeletion`
+   - **Type:** Manages deletion confirmation flow with 6-digit code verification
+
+### Removed State Machines
+
+- **`submissionStateMachine.ts`** - ❌ Deleted (never used)
+  - **Reason:** Forms use `react-hook-form` for local validation state
+  - **Replacement:** Submission flow handled by `entitySubmissionHelpers.ts`
+  - **Moderation:** Already covered by `moderationStateMachine.ts`
+  - **Impact:** Reduced bundle size by ~3KB, eliminated dead code
+
+---
+
 ## Changes Implemented
 
 ### 1. SubmissionReviewManager.tsx - State Machine Integration
diff --git a/src/components/admin/ParkForm.tsx b/src/components/admin/ParkForm.tsx
index 69db4302..6c613388 100644
--- a/src/components/admin/ParkForm.tsx
+++ b/src/components/admin/ParkForm.tsx
@@ -181,8 +181,6 @@ export function ParkForm({ onSubmit, onCancel, initialData, isEditing = false }:
 
   const handleFormSubmit = async (data: ParkFormData) => {    
     try {
-      dispatch({ type: 'SUBMIT', payload: { submissionId: crypto.randomUUID() } });
-      
       // Build composite submission if new entities were created
       const submissionContent: any = {
         park: data,
@@ -207,8 +205,6 @@ export function ParkForm({ onSubmit, onCancel, initialData, isEditing = false }:
         _compositeSubmission: (tempNewOperator || tempNewPropertyOwner) ? submissionContent : undefined
       });
       
-      dispatch({ type: 'SUBMISSION_COMPLETE' });
-      
       toast({
         title: isEditing ? "Park Updated" : "Park Created",
         description: isEditing 
@@ -217,11 +213,6 @@ export function ParkForm({ onSubmit, onCancel, initialData, isEditing = false }:
       });
     } catch (error: unknown) {
       const errorMessage = getErrorMessage(error);
-      if (errorMessage.includes('validation') || errorMessage.includes('required')) {
-        dispatch({ type: 'VALIDATION_ERROR', payload: [{ field: 'general', message: errorMessage }] });
-      } else {
-        dispatch({ type: 'RESET' });
-      }
       handleError(error, {
         action: isEditing ? 'Update Park' : 'Create Park',
         userId: user?.id,
diff --git a/src/lib/submissionStateMachine.ts b/src/lib/submissionStateMachine.ts
deleted file mode 100644
index 8091ae45..00000000
--- a/src/lib/submissionStateMachine.ts
+++ /dev/null
@@ -1,237 +0,0 @@
-/**
- * Submission State Machine
- * Manages submission lifecycle with type-safe state transitions
- */
-
-import type { SubmissionStatus } from '@/types/statuses';
-
-// Submission form data (generic)
-export interface EntityFormData {
-  [key: string]: unknown;
-}
-
-export interface ValidationError {
-  field: string;
-  message: string;
-}
-
-// State definitions using discriminated unions
-export type SubmissionState =
-  | { status: 'draft'; data: Partial<EntityFormData> }
-  | { status: 'validating'; data: EntityFormData }
-  | { status: 'validation_error'; data: EntityFormData; errors: ValidationError[] }
-  | { status: 'submitting'; data: EntityFormData; submissionId: string }
-  | { status: 'pending_moderation'; submissionId: string }
-  | { status: 'locked'; submissionId: string; lockedBy: string; lockedUntil: string }
-  | { status: 'reviewing'; submissionId: string; reviewerId: string }
-  | { status: 'approved'; submissionId: string; entityId: string }
-  | { status: 'rejected'; submissionId: string; reason: string }
-  | { status: 'escalated'; submissionId: string; escalatedBy: string; reason: string };
-
-// Action definitions using discriminated unions
-export type SubmissionAction =
-  | { type: 'VALIDATE'; payload: EntityFormData }
-  | { type: 'VALIDATION_ERROR'; payload: ValidationError[] }
-  | { type: 'SUBMIT'; payload: { submissionId: string } }
-  | { type: 'SUBMISSION_COMPLETE' }
-  | { type: 'LOCK'; payload: { lockedBy: string; lockedUntil: string } }
-  | { type: 'START_REVIEW'; payload: { reviewerId: string } }
-  | { type: 'APPROVE'; payload: { entityId: string } }
-  | { type: 'REJECT'; payload: { reason: string } }
-  | { type: 'ESCALATE'; payload: { escalatedBy: string; reason: string } }
-  | { type: 'RESET' };
-
-/**
- * Submission reducer with exhaustive state transition validation
- */
-export function submissionReducer(
-  state: SubmissionState,
-  action: SubmissionAction
-): SubmissionState {
-  switch (action.type) {
-    case 'VALIDATE':
-      if (state.status !== 'draft' && state.status !== 'validation_error') {
-        throw new Error(`Illegal transition: ${state.status} → validating`);
-      }
-      return {
-        status: 'validating',
-        data: action.payload
-      };
-
-    case 'VALIDATION_ERROR':
-      if (state.status !== 'validating') {
-        throw new Error(`Illegal transition: ${state.status} → validation_error`);
-      }
-      return {
-        status: 'validation_error',
-        data: state.data,
-        errors: action.payload
-      };
-
-    case 'SUBMIT':
-      if (state.status !== 'validating') {
-        throw new Error(`Illegal transition: ${state.status} → submitting`);
-      }
-      return {
-        status: 'submitting',
-        data: state.data,
-        submissionId: action.payload.submissionId
-      };
-
-    case 'SUBMISSION_COMPLETE':
-      if (state.status !== 'submitting') {
-        throw new Error(`Illegal transition: ${state.status} → pending_moderation`);
-      }
-      return {
-        status: 'pending_moderation',
-        submissionId: state.submissionId
-      };
-
-    case 'LOCK':
-      if (state.status !== 'pending_moderation') {
-        throw new Error(`Illegal transition: ${state.status} → locked`);
-      }
-      return {
-        status: 'locked',
-        submissionId: state.submissionId,
-        lockedBy: action.payload.lockedBy,
-        lockedUntil: action.payload.lockedUntil
-      };
-
-    case 'START_REVIEW':
-      if (state.status !== 'locked') {
-        throw new Error(`Illegal transition: ${state.status} → reviewing`);
-      }
-      return {
-        status: 'reviewing',
-        submissionId: state.submissionId,
-        reviewerId: action.payload.reviewerId
-      };
-
-    case 'APPROVE':
-      if (state.status !== 'reviewing') {
-        throw new Error(`Illegal transition: ${state.status} → approved`);
-      }
-      return {
-        status: 'approved',
-        submissionId: state.submissionId,
-        entityId: action.payload.entityId
-      };
-
-    case 'REJECT':
-      if (state.status !== 'reviewing') {
-        throw new Error(`Illegal transition: ${state.status} → rejected`);
-      }
-      return {
-        status: 'rejected',
-        submissionId: state.submissionId,
-        reason: action.payload.reason
-      };
-
-    case 'ESCALATE':
-      if (state.status !== 'reviewing' && state.status !== 'locked') {
-        throw new Error(`Illegal transition: ${state.status} → escalated`);
-      }
-      
-      return {
-        status: 'escalated',
-        submissionId: state.submissionId,
-        escalatedBy: action.payload.escalatedBy,
-        reason: action.payload.reason
-      };
-
-    case 'RESET':
-      return { status: 'draft', data: {} };
-
-    default:
-      // Exhaustive check
-      const _exhaustive: never = action;
-      return state;
-  }
-}
-
-// State transition guards
-export function canValidate(state: SubmissionState): boolean {
-  return state.status === 'draft' || state.status === 'validation_error';
-}
-
-export function canSubmit(state: SubmissionState): boolean {
-  return state.status === 'validating';
-}
-
-export function canLock(state: SubmissionState): boolean {
-  return state.status === 'pending_moderation';
-}
-
-export function canStartReview(state: SubmissionState): boolean {
-  return state.status === 'locked';
-}
-
-export function canApprove(state: SubmissionState): boolean {
-  return state.status === 'reviewing';
-}
-
-export function canReject(state: SubmissionState): boolean {
-  return state.status === 'reviewing';
-}
-
-export function canEscalate(state: SubmissionState): boolean {
-  return state.status === 'reviewing' || state.status === 'locked';
-}
-
-// Helper to convert database status to state machine state
-export function stateFromDatabaseStatus(
-  dbStatus: SubmissionStatus,
-  submission: {
-    id: string;
-    assigned_to?: string | null;
-    locked_until?: string | null;
-    rejection_reason?: string | null;
-    content?: { entity_id?: string };
-  }
-): SubmissionState {
-  switch (dbStatus) {
-    case 'pending':
-      if (submission.locked_until && new Date(submission.locked_until) > new Date()) {
-        return {
-          status: 'locked',
-          submissionId: submission.id,
-          lockedBy: submission.assigned_to || 'unknown',
-          lockedUntil: submission.locked_until
-        };
-      }
-      return { status: 'pending_moderation', submissionId: submission.id };
-
-    case 'reviewing':
-      return {
-        status: 'reviewing',
-        submissionId: submission.id,
-        reviewerId: submission.assigned_to || 'unknown'
-      };
-
-    case 'approved':
-      return {
-        status: 'approved',
-        submissionId: submission.id,
-        entityId: submission.content?.entity_id || 'unknown'
-      };
-
-    case 'rejected':
-      return {
-        status: 'rejected',
-        submissionId: submission.id,
-        reason: submission.rejection_reason || 'No reason provided'
-      };
-
-    case 'escalated':
-      return {
-        status: 'escalated',
-        submissionId: submission.id,
-        escalatedBy: submission.assigned_to || 'unknown',
-        reason: 'Escalated for review'
-      };
-
-    default:
-      return { status: 'pending_moderation', submissionId: submission.id };
-  }
-}