--- title: "USACE Wetland & OHWM Document Library, Regional Supplements, Data Forms, Manuals" description: "Curated index of official USACE wetland delineation and OHWM resources: the 1987 Manual, all 10 Regional Supplements with 2024 data forms, the National OHWM Manual, the Antecedent Precipitation Tool, and Section 404 / Jurisdictional Determination forms." canonical: /resources/usace-library --- # USACE Wetland & OHWM Document Library, Regional Supplements, Data Forms, Manuals Curated index of official USACE wetland delineation and OHWM resources: the 1987 Manual, all 10 Regional Supplements with 2024 data forms, the National OHWM Manual, the Antecedent Precipitation Tool, and Section 404 / Jurisdictional Determination forms. _Curated by Ecobot. Last reviewed June 2026. All documents are property of the U.S. Army Corps of Engineers; links point to official USACE and ERDC sources._ ## 1987 Corps Wetlands Delineation Manual - **Corps of Engineers Wetlands Delineation Manual (1987)** (1987), The foundational technical manual used in conjunction with each Regional Supplement to determine the presence of jurisdictional wetlands. Source: USACE HQ. Link: https://www.usace.army.mil/Missions/Civil-Works/Regulatory-Program-and-Permits/reg_supp/ ## Regional Supplements and 2024 Data Forms Each Regional Supplement is applied alongside the 1987 Manual. There are 10 USACE regions; the 2024 data forms are the current field forms. ### Alaska Coverage: AK. Regional supplement for wetland delineation in Alaska, applies across boreal, coastal, and Arctic systems. - **Regional Supplement, Alaska Region** (2007), Regional supplement to the 1987 Corps Manual covering wetland indicators specific to Alaska. Source: USACE HQ. Link: https://www.usace.army.mil/Missions/Civil-Works/Regulatory-Program-and-Permits/reg_supp/ - **Wetland Determination Data Form, Alaska Region (2024)** (2024), Current USACE data form for Alaska Region wetland determinations. Source: USACE HQ. Link: https://www.usace.army.mil/Missions/Civil-Works/Regulatory-Program-and-Permits/reg_supp/ ### Arid West Coverage: 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, Arid West Region** (2008), Regional supplement for the Arid West, including dry-season indicators and problematic-area guidance. Source: USACE HQ. Link: https://www.usace.army.mil/Missions/Civil-Works/Regulatory-Program-and-Permits/reg_supp/ - **Wetland Determination Data Form, Arid West Region (2024)** (2024), Current USACE data form for the Arid West Region. Source: USACE HQ. Link: https://www.usace.army.mil/Missions/Civil-Works/Regulatory-Program-and-Permits/reg_supp/ ### Atlantic and Gulf Coastal Plain Coverage: 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, Atlantic and Gulf Coastal Plain Region** (2010), Regional supplement to the 1987 Manual for the Atlantic and Gulf coastal plain. Source: USACE HQ. Link: https://www.usace.army.mil/Missions/Civil-Works/Regulatory-Program-and-Permits/reg_supp/ - **Wetland Determination Data Form, Atlantic and Gulf Coastal Plain (2024)** (2024), Current USACE data form for the Atlantic and Gulf Coastal Plain Region. Source: USACE HQ. Link: https://www.usace.army.mil/Missions/Civil-Works/Regulatory-Program-and-Permits/reg_supp/ ### Caribbean Islands Coverage: PR, USVI. Regional supplement covering Puerto Rico, the U.S. Virgin Islands, and associated tropical island systems. - **Regional Supplement, Caribbean Islands Region** (2013), Regional supplement for tropical island wetland delineation in the Caribbean. Source: USACE HQ. Link: https://www.usace.army.mil/Missions/Civil-Works/Regulatory-Program-and-Permits/reg_supp/ - **Wetland Determination Data Form, Caribbean Islands (2024)** (2024), Current USACE data form for the Caribbean Islands Region. Source: USACE HQ. Link: https://www.usace.army.mil/Missions/Civil-Works/Regulatory-Program-and-Permits/reg_supp/ ### Eastern Mountains and Piedmont Coverage: 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, Eastern Mountains and Piedmont Region** (2012), Regional supplement for the Eastern Mountains and Piedmont, including problem-area hydrology guidance. Source: USACE HQ. Link: https://www.usace.army.mil/Missions/Civil-Works/Regulatory-Program-and-Permits/reg_supp/ - **Wetland Determination Data Form, Eastern Mountains and Piedmont (2024)** (2024), Current USACE data form for the Eastern Mountains and Piedmont Region. Source: USACE HQ. Link: https://www.usace.army.mil/Missions/Civil-Works/Regulatory-Program-and-Permits/reg_supp/ ### Great Plains Coverage: 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, Great Plains Region** (2010), Regional supplement for the Great Plains, including prairie pothole indicators. Source: USACE HQ. Link: https://www.usace.army.mil/Missions/Civil-Works/Regulatory-Program-and-Permits/reg_supp/ - **Wetland Determination Data Form, Great Plains (2024)** (2024), Current USACE data form for the Great Plains Region. Source: USACE HQ. Link: https://www.usace.army.mil/Missions/Civil-Works/Regulatory-Program-and-Permits/reg_supp/ ### Hawaii and Pacific Islands Coverage: HI, AS, GU, MP. Regional supplement covering Hawai‘i, American Samoa, Guam, and the Commonwealth of the Northern Mariana Islands. - **Regional Supplement, Hawaii and Pacific Islands Region** (2012), Regional supplement for Pacific Island wetland delineation. Source: USACE HQ. Link: https://www.usace.army.mil/Missions/Civil-Works/Regulatory-Program-and-Permits/reg_supp/ - **Wetland Determination Data Form, Hawaii and Pacific Islands (2024)** (2024), Current USACE data form for the Hawaii and Pacific Islands Region. Source: USACE HQ. Link: https://www.usace.army.mil/Missions/Civil-Works/Regulatory-Program-and-Permits/reg_supp/ ### Midwest Coverage: IA, IL, IN, MI, MN, MO, OH (west), WI. Regional supplement for the Midwest, glaciated systems, fens, sedge meadows, and floodplain forests. - **Regional Supplement, Midwest Region** (2010), Regional supplement to the 1987 Manual for the Midwest. Source: USACE HQ. Link: https://www.usace.army.mil/Missions/Civil-Works/Regulatory-Program-and-Permits/reg_supp/ - **Wetland Determination Data Form, Midwest (2024)** (2024), Current USACE data form for the Midwest Region. Source: USACE HQ. Link: https://www.usace.army.mil/Missions/Civil-Works/Regulatory-Program-and-Permits/reg_supp/ ### Northcentral and Northeast Coverage: 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, Northcentral and Northeast Region** (2012), Regional supplement for the Northcentral and Northeast. Source: USACE HQ. Link: https://www.usace.army.mil/Missions/Civil-Works/Regulatory-Program-and-Permits/reg_supp/ - **Wetland Determination Data Form, Northcentral and Northeast (2024)** (2024), Current USACE data form for the Northcentral and Northeast Region. Source: USACE HQ. Link: https://www.usace.army.mil/Missions/Civil-Works/Regulatory-Program-and-Permits/reg_supp/ ### Western Mountains, Valleys, and Coast Coverage: 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, Western Mountains, Valleys, and Coast Region** (2010), Regional supplement for the Western Mountains, Valleys, and Coast. Source: USACE HQ. Link: https://www.usace.army.mil/Missions/Civil-Works/Regulatory-Program-and-Permits/reg_supp/ - **Wetland Determination Data Form, Western Mountains, Valleys, and Coast (2024)** (2024), Current USACE data form for the Western Mountains, Valleys, and Coast Region. Source: USACE HQ. Link: https://www.usace.army.mil/Missions/Civil-Works/Regulatory-Program-and-Permits/reg_supp/ ## Ordinary High Water Mark (OHWM) - **A National Ordinary High Water Mark Field Delineation Manual for Rivers and Streams** (2024), The 2024 national OHWM manual published by USACE ERDC. The current authoritative reference for OHWM identification on rivers and streams nationwide. Source: USACE ERDC. Link: https://www.erdc.usace.army.mil/Locations/CRREL/OHWM/ - **National OHWM Data Sheet (Interim Version)** (2024), Standardized field data sheet that accompanies the National OHWM Manual. Source: USACE ERDC. Link: https://www.erdc.usace.army.mil/Locations/CRREL/OHWM/ - **Arid West Regional OHWM Technical Guide**, Regional guide for OHWM identification in the Arid West, supplementing the national manual with regional indicators. Source: USACE ERDC. Link: https://www.erdc.usace.army.mil/Locations/CRREL/OHWM/ - **Western Mountains OHWM Regional Guidance**, Regional OHWM technical guidance for Western Mountains river systems. Source: USACE ERDC. Link: https://www.erdc.usace.army.mil/Locations/CRREL/OHWM/ ## Antecedent Precipitation Tool (APT) - **Antecedent Precipitation Tool (APT)**, Free USACE-developed tool that automates Web-based Water-Budget and Antecedent Precipitation analyses for wetland delineations and jurisdictional determinations. Source: USACE ERDC. Link: https://www.erdc.usace.army.mil/Locations/CRREL/Wetland-Resources/Antecedent-Precipitation-Tool/ - **APT User Guide and Documentation**, Official user documentation, technical methodology, and reference papers for the Antecedent Precipitation Tool. Source: USACE ERDC. Link: https://www.erdc.usace.army.mil/Locations/CRREL/Wetland-Resources/Antecedent-Precipitation-Tool/ ## Jurisdictional Determination and Section 404 Permit Forms - **Approved Jurisdictional Determination (AJD) Form**, USACE form documenting an Approved Jurisdictional Determination of the presence or absence of waters of the United States. Source: USACE HQ. Link: https://www.usace.army.mil/Missions/Civil-Works/Regulatory-Program-and-Permits/juris_info/ - **Preliminary Jurisdictional Determination (PJD) Form**, USACE form for a Preliminary Jurisdictional Determination, a non-binding statement that aquatic resources may be waters of the United States. Source: USACE HQ. Link: https://www.usace.army.mil/Missions/Civil-Works/Regulatory-Program-and-Permits/juris_info/ - **ENG Form 4345, Department of the Army Permit Application**, 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. Source: USACE HQ. Link: https://www.usace.army.mil/Missions/Civil-Works/Regulatory-Program-and-Permits/