SB 3684 amends the Energy Independence and Security Act of 2007 to reauthorize and expand the Department of Energy’s water power research, development, demonstration, and commercial application programs. The bill broadens research scope (adding cybersecurity, generation and project delivery, arctic marine conditions, and invasive‑species mitigation), explicitly supports domestic composite and additive manufacturing for marine components, and adds workforce-development and Tribal engagement provisions.
Practically, the bill reorganizes statutory definitions, requires DOE to solicit and make awards at least annually (subject to funding), mandates briefings to Congress within one year and then at least every two years, and raises the authorization to $300 million per year for fiscal years 2026–2030. The changes steer federal R&D toward commercialization, resilient coastal applications (including cooperative demonstrations with the Department of Defense), and growing a skilled domestic workforce and supplier base.
At a Glance
What It Does
The bill amends multiple sections of EISA Title 6 to expand the research priorities for hydropower and marine energy, add manufacturing scale‑up (composite and additive manufacturing), fund workforce and Tribal training programs, and require DOE to solicit awards at least annually and brief Congress on progress. It also adds cybersecurity and project delivery to hydropower research priorities and directs work on arctic‑rated marine systems.
Who It Affects
DOE program offices and National Laboratories administering water power programs; marine and hydropower manufacturers (especially composite/additive supply chains); universities and regional test centers (including Tribal Colleges and Alaska Native institutions); coastal, island, and Arctic communities targeted for resilience demonstrations; and the Department of Defense for cooperative projects.
Why It Matters
The bill shifts from basic R&D toward commercialization, domestic industrial capacity, and resilience use cases — signaling federal support for a U.S. marine‑energy supply chain while tying research to grid modeling, licensing reform, and workforce pipelines. It also substantially increases authorized funding, creating an opportunity for new long‑lead manufacturing and demonstration investments.
More articles like this one.
A weekly email with all the latest developments on this topic.
What This Bill Actually Does
SB 3684 revises the statutory program that funds water power research to expand both what DOE can do and how it does it. The bill reorganizes the definitions section and then adjusts program priorities across three program areas: water power technology research, hydropower R&D, and marine energy R&D.
For technology R&D, it adds language explicitly supporting United States‑based scale‑up of composite and additive manufacturing for marine energy components and encourages collaboration with regional colleges and industry facilities.
On hydropower, the bill widens the statutory scope to include generation, cybersecurity, hydrology, project management and delivery strategies, and pumped storage integration into grid modeling. It requires studies—conducted with federal, state, Tribal, and local partners—that aim to streamline and improve the hydropower licensing process by compiling environmental data, accepted practices, and methods for assessing environmental and economic impacts.
The statute also adds research on mitigating invasive species impacts on hydropower equipment and creates explicit Tribal workforce and training support.For marine energy, SB 3684 updates facility and infrastructure language to include equipment and microgrids, expands potential applications (including desalination, hydrogen and other transport fuels, aquaculture, marine carbon dioxide removal, and community microgrids), and authorizes cooperative defense demonstrations with the Department of Defense and Navy for resilient coastal power and surveillance. It also directs development and deployment of devices designed for harsh arctic tidal, temperature, and icing conditions.The bill strengthens program administration: it broadens collaboration (explicitly naming the Department of Commerce’s NOAA and Sea Grant), adds Tribal Colleges and Universities to outreach and award eligibility considerations, and calls for workforce development programs (collegiate competitions, fellowships, and student research).
DOE must solicit applications and, subject to appropriations, make awards not less frequently than once per fiscal year. The bill replaces an older authorization level with $300 million per year for FY2026–2030 (allocated $200 million to marine energy and $100 million to hydropower) and requires a briefing to Congress within one year and at least every two years thereafter on strategic plans and program progress.
The Five Things You Need to Know
The bill authorizes $300 million per year for fiscal years 2026–2030, allocated as $200 million for marine energy and $100 million for hydropower R&D and demonstration.
DOE must solicit applications and, to the extent funding is available, make awards not less frequently than once per fiscal year.
Hydropower research is expanded to include cybersecurity, generation, hydrology, project management and delivery strategies, pumped storage grid modeling, and invasive‑species mitigation research.
The statute directs support for domestic scaling of composite and additive manufacturing for marine energy components and explicitly authorizes cooperative Department of Defense and Navy demonstration projects for resilient coastal power.
The bill requires development, validation, and deployment of marine energy systems designed for Arctic tidal, temperature, and icing conditions, plus workforce and Tribal training programs tied to National Marine Energy Centers and regional test sites.
Section-by-Section Breakdown
Every bill we cover gets an analysis of its key sections.
Reorder and clarify statutory definitions
The bill reorganizes the numeric ordering of several definition paragraphs to appear in numerical order, a housekeeping change that also signals an intent to tidy the statutory framework before adding new authorities. Practically, this makes later cross‑references cleaner for program administrators and reduces ambiguity when new program elements refer back to defined terms.
Add manufacturing scale‑up and regional higher‑education partnerships
This section adds a new, explicit authorization to advance U.S.‑based manufacturing of composite and additive‑manufactured marine energy components through collaborations with regional institutions of higher education and industry. That language shifts program emphasis toward commercial readiness and domestic supply‑chain development and encourages DOE to partner with advanced composite and additive manufacturing facilities.
Broaden hydropower research priorities and licensing studies
Amendments expand the program’s research remit to include generation (not just efficiency), cybersecurity, hydrology, project management/delivery strategies, and pumped storage integration into grid modeling. The bill replaces a prior licensing‑related provision with a directive to study licensing streamlining in coordination with federal, state, Tribal (including Alaska Native Corporations), and local partners — specifically to compile environmental data, best practices, public comments, and impact‑assessment methodologies. It also adds research on invasive‑species impacts and makes workforce development an express program element.
Expand marine energy applications, manufacturing, and defense demos
Changes add equipment and microgrids to the list of supported infrastructure, broaden facility language to include smart energy management systems, and require support for manufacturing and industrial activity. The bill explicitly includes production of hydrogen and other transport fuels as potential marine energy outputs and authorizes cooperative demonstrations with the Department of Defense and Navy for resilient coastal power and surveillance. It also enumerates specific resilience and commercial applications — desalination, disaster recovery, aquaculture, marine carbon dioxide removal, community microgrids, and working waterfront economies — and mandates work on arctic‑rated systems.
Select centers with access to unique regional test sites and boost education
The criteria for National Marine Energy Centers are amended to weigh access to regional test sites with unique natural advantages (e.g., strong currents, high tidal ranges, cold water). The centers’ mission explicitly includes support for workforce development, student research programs, curriculum development, and outreach to grow the next generation of marine energy professionals.
Widen partnerships, change award and reporting cadence, add NOAA/Sea Grant coordination
Administration provisions add Tribal Colleges and Universities to outreach and participation lists, expand international and federal collaboration language to include the Department of State and Commerce agencies, and require DOE to coordinate with NOAA and the Sea Grant program. The section changes the award cadence language to require DOE to solicit applications and make awards at least annually (subject to funding), shifts a planning/reporting cadence from annual to biennial for strategic planning, and requires initial and recurring briefings to Congress on program findings and implementation progress.
Increase authorization to support commercialization and demonstrations
The bill replaces the former authorization level with a substantially higher figure: $300 million per year for FY2026–2030, split $200 million for marine energy and $100 million for hydropower. That reallocation signals a legislative preference for marine energy scale‑up and commercial demonstration activity while maintaining a dedicated portion for conventional hydropower research.
This bill is one of many.
Codify tracks hundreds of bills on Energy across all five countries.
Explore Energy in Codify Search →Who Benefits and Who Bears the Cost
Every bill creates winners and losers. Here's who stands to gain and who bears the cost.
Who Benefits
- Domestic marine‑component manufacturers — The bill prioritizes U.S.‑based composite and additive manufacturing, creating demand signals, funding opportunities, and partnerships with regional colleges and test centers that can accelerate commercialization and domestic supply‑chain growth.
- Coastal, island, and Arctic communities — Funding and demonstration authority for resilience applications (desalination, disaster recovery, community microgrids, and arctic‑rated systems) target communities that need decentralized and robust power, offering new resilience projects and potential local economic activity.
- Tribal entities and Alaska Native Corporations — The statute explicitly includes Tribes in licensing studies and workforce programs and calls out Alaska Native Corporations in licensing coordination, giving Tribal stakeholders clearer statutory footing for engagement and capacity‑building funding.
- Universities and regional test centers (including National Marine Energy Centers) — The bill favors institutions with access to unique natural test sites and funds workforce development, student research, and curriculum dissemination, strengthening academic‑industry testbeds.
- Department of Defense and Navy — Cooperative demonstration authority for resilient coastal power and surveillance lets the DOD leverage marine energy R&D for defense resilience needs and creates partnership pathways and potential co‑funded demos.
Who Bears the Cost
- Federal taxpayers and appropriations committees — The bill increases authorized spending substantially, so funding decisions will require appropriation action and compete with other priorities in the federal budget.
- DOE program offices and National Laboratories — Expanded mission scope (manufacturing scale‑up, arctic systems, cybersecurity, licensing studies, workforce programs) requires staffing, new contracting vehicles, and interagency coordination obligations that increase administrative workload.
- Regional and small test centers or developers — Meeting new performance, manufacturing, and demonstration expectations (e.g., arctic hardening, invasive‑species mitigation) may require capital investments that small developers and communities must front or match to access federal awards.
- State and local agencies providing environmental data — The licensing‑streamlining studies depend on compiling environmental data and accepted practices from state, Tribal, and local agencies, which may impose data‑collection and coordination costs on those partners.
- Tribal institutions (in short term) — While the bill funds Tribal workforce programs, meaningful participation may require initial capacity investments by Tribal Colleges and organizations to compete for awards and implement training programs.
Key Issues
The Core Tension
The central dilemma is between accelerating domestic deployment, manufacturing, and defense‑grade resilience of water power technologies (speed, industrial policy, commercialization) and preserving robust environmental review, local and Tribal consultation, and equitable access to program benefits; pushing too fast risks sidelining environmental safeguards and underfunding community capacity, while moving too slowly risks losing industrial leadership and delaying resilience gains.
SB 3684 tilts DOE’s water power programs toward commercialization, resilience, and domestic manufacturing, but the statute leaves several implementation choices unresolved. The authorization jump creates opportunity but does not guarantee appropriations; selection criteria for manufacturing scale‑up, center designation, and regional test‑site preference are not detailed, which means DOE rulemaking and competitive solicitations will determine winners.
Similarly, the bill requires licensing‑streamlining studies and expanded coordination with states and Tribes, but it does not prescribe how to balance expedited permitting with statutory environmental protections under other laws — that balance will play out in study design and interagency practice.
Interagency and DOD partnerships raise practical coordination and priority‑setting questions. Cooperative demonstrations with the Department of Defense can accelerate resilient designs and provide funding leverage, but they risk aligning R&D toward defense‑centric requirements (cost, specifications, security) rather than purely commercial or ecological objectives.
Workforce and Tribal capacity provisions are important, but the statute offers programmatic direction without dedicated, guaranteed implementation funds or clear matching requirements, creating a potential gap between programmatic intent and on‑the‑ground capacity to participate.
Try it yourself.
Ask a question in plain English, or pick a topic below. Results in seconds.