The 1987 Corps Manual, all 10 Regional Supplements with their current data forms, the National OHWM Manual and regional guides, the Antecedent Precipitation Tool, and the core jurisdictional determination and Section 404 permit forms, each linked directly to its official USACE or ERDC source.
Curated and reviewed by Ecobot · Last reviewed June 2026. All documents are the property of the U.S. Army Corps of Engineers; this page links to the authoritative sources and does not mirror PDFs.
Every regional supplement is read alongside the 1987 Manual. Together they form the technical basis for jurisdictional wetland determinations.
The foundational technical manual used in conjunction with each Regional Supplement to determine the presence of jurisdictional wetlands.
Each supplement adapts the 1987 Manual to a specific region's indicators of hydric soils, hydrophytic vegetation, and wetland hydrology. The 2024 data forms are the current field forms used to document determinations.
AK
Regional supplement for wetland delineation in Alaska, applies across boreal, coastal, and Arctic systems.
Regional supplement to the 1987 Corps Manual covering wetland indicators specific to Alaska.
Current USACE data form for Alaska Region wetland determinations.
AZ · CA (south/east) · CO (west) · ID (south) · NV · NM (west) · OR (east) · UT · WA (east)
Regional supplement covering the desert Southwest, intermountain basins, and Mediterranean California.
Regional supplement for the Arid West, including dry-season indicators and problematic-area guidance.
Current USACE data form for the Arid West Region.
AL · FL · GA · LA · MS · NC · SC · TX (east) · VA (east) · MD (east) · DE · NJ (south)
Regional supplement for the Atlantic and Gulf coastal plain, pine flatwoods, pocosins, bottomland hardwoods, and tidal systems.
Regional supplement to the 1987 Manual for the Atlantic and Gulf coastal plain.
Current USACE data form for the Atlantic and Gulf Coastal Plain Region.
PR · USVI
Regional supplement covering Puerto Rico, the U.S. Virgin Islands, and associated tropical island systems.
Regional supplement for tropical island wetland delineation in the Caribbean.
Current USACE data form for the Caribbean Islands Region.
AL (north) · GA (north) · KY · MD (west) · NC (west) · NJ (north) · NY (south) · OH (east) · PA · SC (west) · TN · VA (west) · WV
Regional supplement spanning the Appalachian highlands and Piedmont, headwater systems, seeps, and bogs.
Regional supplement for the Eastern Mountains and Piedmont, including problem-area hydrology guidance.
Current USACE data form for the Eastern Mountains and Piedmont Region.
CO (east) · KS · MT (east) · NE · NM (east) · ND · OK · SD · TX (north/central) · WY (east)
Regional supplement for the Great Plains, prairie potholes, playas, riparian corridors, and saline systems.
Regional supplement for the Great Plains, including prairie pothole indicators.
Current USACE data form for the Great Plains Region.
HI · AS · GU · MP
Regional supplement covering Hawai‘i, American Samoa, Guam, and the Commonwealth of the Northern Mariana Islands.
Regional supplement for Pacific Island wetland delineation.
Current USACE data form for the Hawaii and Pacific Islands Region.
IA · IL · IN · MI · MN · MO · OH (west) · WI
Regional supplement for the Midwest, glaciated systems, fens, sedge meadows, and floodplain forests.
Regional supplement to the 1987 Manual for the Midwest.
Current USACE data form for the Midwest Region.
CT · MA · ME · NH · NJ (north) · NY · PA (north) · RI · VT · MI (UP) · WI (north) · MN (north)
Regional supplement for the Northcentral and Northeast, glaciated terrain, vernal pools, and northern hardwoods.
Regional supplement for the Northcentral and Northeast.
Current USACE data form for the Northcentral and Northeast Region.
CA (north) · ID (north) · MT (west) · OR (west) · WA (west) · WY (west)
Regional supplement for the Pacific Northwest, northern California, and the northern Rockies.
Regional supplement for the Western Mountains, Valleys, and Coast.
Current USACE data form for the Western Mountains, Valleys, and Coast Region.
The 2024 National OHWM Manual from USACE ERDC is now the authoritative reference for identifying the ordinary high water mark on rivers and streams. Regional technical guides extend it with region-specific indicators.
The 2024 national OHWM manual published by USACE ERDC. The current authoritative reference for OHWM identification on rivers and streams nationwide.
Standardized field data sheet that accompanies the National OHWM Manual.
Regional guide for OHWM identification in the Arid West, supplementing the national manual with regional indicators.
Regional OHWM technical guidance for Western Mountains river systems.
The 2008 Compensatory Mitigation Rule (33 CFR Part 332) and the USACE-hosted RIBITS system govern mitigation banking and in-lieu fee programs. Below are the federal rule, the Mitigation Banking Instrument (MBI) template, monitoring expectations, and annual report guidance, all from USACE.
The federal rule governing compensatory mitigation for unavoidable impacts to waters of the U.S., establishes performance standards, monitoring, long-term protection, and a preference hierarchy (bank → ILF → permittee-responsible).
Official USACE-hosted system of record for mitigation banks and in-lieu fee programs nationwide. Search active banks, view service areas, prospectuses, instruments, and credit ledgers.
USACE-issued template and checklist for a Mitigation Banking Instrument, the binding legal agreement that establishes a mitigation bank, its service area, performance standards, monitoring, and long-term management.
Guidance for sponsors preparing the prospectus, the first step in establishing a mitigation bank or in-lieu fee program under the 2008 Rule.
Federal expectations for ecological performance standards, monitoring frequency (typically annual for 5-10+ years), reporting templates, and adaptive management for wetland and stream mitigation sites.
Common USACE district expectations for annual mitigation monitoring reports: as-built conditions, vegetation plots, hydrology data, photo points, hydrology gauges, invasive species, and performance-standard attainment.
USACE district-level methods for stream mitigation credit determination, including reach-scale functional assessments and condition-based crediting.
USACE ERDC's free tool that automates antecedent precipitation analysis. APT outputs are routinely cited in jurisdictional determinations and 404 permit applications.
Free USACE-developed tool that automates Web-based Water-Budget and Antecedent Precipitation analyses for wetland delineations and jurisdictional determinations.
Official user documentation, technical methodology, and reference papers for the Antecedent Precipitation Tool.
Ecobot Manager runs the official USACE APT code automatically against your project's points and dates, or a centroid on a date you set. Returns the standard APT PDF plus raw JSON. See how automated APT works →
The core USACE forms used to document jurisdictional determinations and apply for Department of the Army permits under CWA Section 404 and RHA Section 10.
USACE form documenting an Approved Jurisdictional Determination of the presence or absence of waters of the United States.
USACE form for a Preliminary Jurisdictional Determination, a non-binding statement that aquatic resources may be waters of the United States.
Standard application form for Department of the Army permits authorizing activities in waters of the United States under Section 404 of the Clean Water Act and Section 10 of the Rivers and Harbors Act.
North Carolina's Division of Water Resources publishes the stream identification methodology and forms required for 401 Water Quality Certification and the state's riparian buffer rules, used alongside (not instead of) USACE federal methods. The field form is still published under its original DWQ name.
The North Carolina Division of Water Resources field form (still named for the former DWQ) used to identify intermittent and perennial stream origins for 401 Water Quality Certifications and the state's riparian buffer rules.
Program landing page for NC's 401 Water Quality Certifications, riparian buffer rules (Neuse, Tar-Pamlico, Catawba, Jordan, Falls, Goose Creek, Randleman), and isolated wetland review.
North Carolina's surface water classifications and water quality standards under 15A NCAC subchapter 02B, referenced alongside USACE Wilmington District JD packages.
DWR-maintained index of guidance and forms covering streams, wetlands, and riparian buffers, including post-Helene 401 certification guidance and the Environmental Application Tracker.
Open the right 2024 data form for your region, capture indicators in the field with AI plant ID and GNSS-grade GPS, and export a signed PDF that mirrors the USACE source form exactly.
