Executive Summary
Concise overview of site conditions, principal drainage constraints, and recommended approach so reviewers quickly understand project intent and major impacts.
The Predevelopment Drainage Proposal identifies flood risk, regulatory constraints, and cost drivers early, reducing rework during permitting. It clarifies design scope for engineers, planners, and reviewers, and supports more predictable municipal review by documenting methods and assumed conditions.
Teams that prepare, review, or rely on drainage analysis use this proposal at early project stages to align expectations and identify permit requirements.
Use the proposal to document assumptions, provide a defensible basis for later design decisions, and reduce the likelihood of costly redesign during permitting.
The project manager coordinates the proposal, consolidates inputs from civil design, environmental, and surveying teams, and signs to confirm project scope and budget assumptions. This person is typically authorized to accept scope changes and route the document for approval.
A licensed civil or drainage engineer signs to certify the technical methods and calculations. The Engineer of Record accepts professional responsibility for the hydrologic models, design assumptions, and recommended mitigation, and may be required for permit submissions.
| Field | Configuration |
|---|---|
| Routing Order | Sequential: Engineer → Project Manager → Permit Contact |
| Authentication | Email + SMS code for external reviewers |
| Attachment Policy | Require supporting H&H calculations and survey |
| Retention | Archive signed PDF and audit trail |
Ensure the chosen signing platform supports secure uploads, PDF/A export, and an auditable certificate of completion.
Verify the platform preserves the audit trail, stores signed copies securely, and meets any industry compliance requirements such as HIPAA or 21 CFR Part 11 when applicable.
| signNow | DocuSign | Adobe Sign | PandaDoc | HelloSign | |
|---|---|---|---|---|---|
| Starting Price | $8/user/mo | $15/user/mo | $14/user/mo | $19/user/mo | $15/user/mo |
| Free Trial | 7-day free trial | Yes | Yes | Yes | Yes |
| Bulk Send | Yes (Premium tier) | Yes | Yes | Yes | No |
| Audit Trail | Yes | Yes | Yes | Yes | Yes |
| HIPAA Compliant | Yes (BAA available) | Yes | Yes | No | No |
Concise overview of site conditions, principal drainage constraints, and recommended approach so reviewers quickly understand project intent and major impacts.
Survey, topography, soils, and drainage patterns documented with references to data sources and observation dates for reproducibility.
Peak flow and runoff volume analyses using accepted regional methods and design storms with clear model inputs and assumptions listed.
Conceptual pipe, swale, and channel layouts with estimated slopes and capacities sufficient for early coordination and cost estimating.
Detention/retention sizing, BMP descriptions, pollutant removal expectations, and preliminary maintenance responsibilities described.
Crosswalk of local stormwater criteria, permit triggers, and anticipated submittal items to streamline later permit packages.
1–3 weeks depending on site complexity
3–7 days for stakeholder comments
2–8 weeks depending on jurisdiction
1–4 weeks per review cycle
Concurrent with final design submission
Collect survey data and identify drainage constraints for initial analysis.
Produce calculations and conceptual plans for internal review.
Submit to jurisdiction and address review comments as received.
Incorporate approved elements into construction documents and permits.
A city infill site required early drainage assessment to avoid downstream flooding concerns
A subdivision proposal identified limited outfall capacity at the planning stage