# Engineers Corps 4 documents across 3 days of the archive, 1 of them final rules. The five most recent days are below. [HTML](https://downstream.sh/daily/agency/engineers-corps/) · [the long-form archive](https://downstream.sh/daily/agency/engineers-corps/archive.md) · [the daily issue](https://downstream.sh/daily/index.md) ## Dates this agency has set that have not yet arrived | Date | Offset | What | Document | Agency | |---|---|---|---|---| | 2026-10-09 | +28d | Comments close | [Updated Definition of “Waters of the United States”](https://www.federalregister.gov/documents/2026/09/09/2026-18317/updated-definition-of-waters-of-the-united-states) | Defense Department · Engineers Corps · Environmental Protection Agency | ## 10 September 2026 — 1 document [the whole issue for this day](https://downstream.sh/daily/2026-09-10.md) > The Army Corps of Engineers published a notice of two virtual meetings of the Western Water Cooperative Committee scheduled for October 1 and October 6, 2026. — via Downstream, https://downstream.sh/daily/agency/engineers-corps/#s-2026-09-10 *Machine-written by `claude-haiku-4-5-20251001` from the documents below.* ### Notice of the Virtual Meetings of the Federal Advisory Committee Known as the Western Water Cooperative Committee *Notice* — Defense Department · Engineers Corps The Western Water Cooperative Committee, a Federal Advisory Committee, provides a forum for discussions between the U.S. Army Corps of Engineers ("Corps") and Western States regarding the operation of Corps projects and water rights and water laws of Western States. The Western Water Cooperative Committee will host two online virtual meetings, one on October 1, 2026, that will give the Corps presentations on water management and water supply authorities given at the December 2025 meeting, and one on October 6, 2026, that will be a discussion on the Committee by-laws. These meetings are open to the public. 91 FR 57578 · FR Doc. 2026-18488 · [official PDF](https://www.govinfo.gov/content/pkg/FR-2026-09-10/pdf/2026-18488.pdf) · [federalregister.gov](https://www.federalregister.gov/documents/2026/09/10/2026-18488/notice-of-the-virtual-meetings-of-the-federal-advisory-committee-known-as-the-western-water) ## 9 September 2026 — 1 document [the whole issue for this day](https://downstream.sh/daily/2026-09-09.md) > The Army Corps of Engineers and Environmental Protection Agency published a supplemental proposed rule revising the definition of waters covered under the Clean Water Act. — via Downstream, https://downstream.sh/daily/agency/engineers-corps/#s-2026-09-09 *Machine-written by `claude-haiku-4-5-20251001` from the documents below.* ### Updated Definition of “Waters of the United States” *Proposed Rule · significant under E.O. 12866* — Defense Department · Engineers Corps · Environmental Protection Agency The purpose of this supplemental notice of proposed rulemaking is for the U.S. Environmental Protection Agency (EPA) and the Department of the Army ("the agencies") to supplement and seek additional comment on certain aspects of an earlier proposal, published on November 20, 2025, to revise the regulations defining the scope of waters federally covered under the Clean Water Act in light of the U.S. Supreme Court's 2023 decision in Sackett v. Environmental Protection Agency. As stated in the agencies' November 20, 2025 Notice of Proposed Rulemaking (NPRM), the agencies intend for this rulemaking to provide greater regulatory certainty and increase Clean Water Act program predictability and consistency by clarifying the definition of "waters of the United States." After consideration of the public comments received on the NPRM, the agencies are issuing this notice to supplement the NPRM with additional regulatory options on certain aspects of the proposed rule. - **Comments close** 9 October 2026 (in 28 days) 91 FR 57284 · FR Doc. 2026-18317 · [official PDF](https://www.govinfo.gov/content/pkg/FR-2026-09-09/pdf/2026-18317.pdf) · [federalregister.gov](https://www.federalregister.gov/documents/2026/09/09/2026-18317/updated-definition-of-waters-of-the-united-states) ## 11 August 2026 — 2 documents [the whole issue for this day](https://downstream.sh/daily/2026-08-11.md) ### Danger Zone: Pacific Ocean at Marine Corps Base Hawaii, Kaneohe Bay, Island of Oahu, Hawaii *Rule* — Defense Department · Engineers Corps The United States Army Corps of Engineers (Corps) is amending its regulations for an existing danger zone at the U.S. Marine Corps Ulupau Crater Weapons Training Range in the vicinity of Kaneohe Bay, Hawaii. The Marine Corps requested a change to the current hours that weapons firing may be conducted. This amendment is necessary in order to ensure public safety. - **Takes effect** 10 September 2026 (1 days ago) 91 FR 51594 · FR Doc. 2026-16359 · [official PDF](https://www.govinfo.gov/content/pkg/FR-2026-08-11/pdf/2026-16359.pdf) · [federalregister.gov](https://www.federalregister.gov/documents/2026/08/11/2026-16359/danger-zone-pacific-ocean-at-marine-corps-base-hawaii-kaneohe-bay-island-of-oahu-hawaii) ### Restricted Area: Naval Weapons Station Seal Beach *Proposed Rule* — Defense Department · Engineers Corps The U.S. Army Corps of Engineers (Corps) is proposing to revise the existing regulations for a restricted area within Naval Weapons Station Seal Beach (NWSSB). The Department of the Navy requested amendment of a restricted area located within NWSSB, in the City of Seal Beach, Orange County, California (33.7334 Latitude/- 118.0953 Longitude). NWSSB is the primary West Coast installation for the supply of munitions to U.S. Navy vessels. Following an extensive project to reconfigure Anaheim Bay, including the creation of a new ammunition pier and the relocation of a public boating channel, the Department of the Navy requested the Corps modify the existing restricted area regulations to protect the public from navigational and operational hazards, and to protect government assets, missions, and the base population in general. - **Comments close** 10 September 2026 (1 days ago) 91 FR 51633 · FR Doc. 2026-16357 · [official PDF](https://www.govinfo.gov/content/pkg/FR-2026-08-11/pdf/2026-16357.pdf) · [federalregister.gov](https://www.federalregister.gov/documents/2026/08/11/2026-16357/restricted-area-naval-weapons-station-seal-beach) ## Ask an assistant instead Everything on this page is also a tool call. Add `mcp.downstream.sh` as an MCP server — no key, no account — then paste this: ``` Using the Downstream MCP server at mcp.downstream.sh, call whats_new_since with agency "Engineers Corps" since 2026-08-11, then summarise what changed and list every deadline it created. ``` Reaches `whats_new_since`. The response carries its own citations and states what it is missing, including which dates it has no record for. --- Every document linked here is a work of the United States government and in the public domain. The Federal Register's HTML and XML renderings are unofficial; the PDF on each item is the official text, and that is the one to cite. Counts are arithmetic over published fields, dates are printed as filed, and titles are verbatim. Where we have nothing, this says nothing rather than estimating. The one-sentence agency summaries are machine-written from those same fields and are labelled where they appear. 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