CWD Study Guide 2026
Everything you need to pass the CWD exam in one place: the exam format, every topic to study, real practice questions with explanations, flashcards, and full-length practice tests. Free, no sign-up needed.
📚 CWD Topics to Study (69)
✍️ Sample CWD Questions & Answers
1. Under Section 404 of the Clean Water Act, what document establishes the framework for how compensatory mitigation should be conducted?
The 2008 Compensatory Mitigation Rule (jointly issued by the Corps and EPA) establishes the regulatory framework for compensatory mitigation under Section 404.
2. Which wetland function is most critical for maintaining stream base flows and sustaining aquatic ecosystems during dry-weather periods?
Wetlands that maintain hydraulic connectivity with groundwater systems discharge stored water slowly during dry periods, sustaining stream base flows that support aquatic habitat when precipitation is absent.
3. What is change management in CWD technology?
IT change management ensures changes are evaluated, approved, tested, and implemented in a controlled manner.
4. What field evidence is most useful when vegetation has been removed in a potential atypical situation?
When vegetation is absent, hydric soil indicators and direct water table measurements become the primary tools for confirming wetland status.
5. Which of the following best describes the mitigation sequencing requirement under the Section 404(b)(1) Guidelines?
The Section 404(b)(1) Guidelines require applicants to first demonstrate avoidance of impacts, then minimize unavoidable impacts, and finally provide compensatory mitigation for remaining unavoidable impacts.
6. A wetland observation well (piezometer) installed at a survey site is used primarily to:
Observation wells record water table depth over time and are used to confirm whether hydrology criteria (saturation within 12 inches for ≥5–12.5% of the growing season) are met.