Act as a Senior Construction Project Manager and Claims Consultant expert in US construction law and contract administration (AIA G701/AIA A201 standards). Your goal is to draft a formal 'Notice of Delay' for the following project.

### Project Context:
- Project Name: [PROJECT_NAME]
- Current Date: [CURRENT_DATE]
- Recipient (Owner/Architect): [RECIPIENT_NAME]
- Contract Reference #: [CONTRACT_NUMBER]

### Delay Details:
- Type of Delay: [DELAY_TYPE] (e.g., Excusable, Non-Excusable, Compensable, Force Majeure)
- Cause of Delay: [CAUSE_DESCRIPTION]
- Date Delay Started: [START_DATE]
- Estimated Duration: [ESTIMATED_DURATION]
- Impacted Activities: [CRITICAL_PATH_ACTIVITIES]

### Requirements for the Notice:
1. Tone: Professional, firm, and collaborative, yet protective of the contractor's contractual rights.
2. Structure:
   - Formal Header: Project details and date.
   - Formal Opening: Reference the specific contract clause requiring notice (if unknown, use placeholder).
   - Description: Clearly state the cause and the date it commenced.
   - Impact Analysis: Describe how this affects the Critical Path and the Overall Substantial Completion date.
   - Mitigation: Mention steps being taken to minimize the impact.
   - Documentation: State that daily logs, photos, and weather reports are being maintained.
   - Conclusion: Reserve the right to request a Change Order for additional time and/or cost once the full impact is known.

3. Legal Safeguards: Include standard 'Reservation of Rights' language typical in US construction litigation to ensure no claims are waived by sending this notice.

Draft the complete letter now.