Reports Library

Welcome to the Commission’s Reports Library.

The Commission's reports are listed below in chronological order. Please contact us if you are interested in older reports.

The Susquehanna Atlas and Portals have other data.

number results
Year Report Title High Level Category Tag 1 Tag 2 Tag 3 Tag 4 Tag 5
2023 Susquehanna River Basin Commission Annual Report 2023 Commission Documents Annual Reports
2023 Susquehanna River Basin Commission Financial Statements for the Year Ended June 30, 2023 and Independent Auditor's Report Other Commission Documents
2023 Identifying Optimal Groundwater Recharge Locations and Critical Aquifer Recharge Areas Within the Susquehanna River Basin Groundwater Drought Instream Flow Water Availability Environmental Low Flow
2023 Water Quality Trends Adjusted For Seasonality And Streamflow Using Continuous Instream Data In The Susquehanna River Basin Continuous Monitoring (CIM) Monitoring Environmental Instream Flow
2022 Roller Mill Dam Removal Effects on Chiques Creek Interim Technical Summary: Additional Pre-Dam Removal Sampling Water Quality Sediment Lower Susquehanna TMDL Nutrients
2022 Pilot Harmful Algal Bloom Monitoring Project: Lackawanna Lake, Lackawanna County, PA Water Quality Pollutants Middle Susquehanna
2022 Large River Monitoring Project: Lower Susquehanna River System Interim Technical Summary (2021/Year 3) Water Quality Monitoring Fish Large River Assessment Project
2022 Water Quality Index Supplemental Sampling Monitoring Environmental Pollutants Nutrients
2022 Restoration Monitoring of American Eel in Three Southcentral Pennsylvania Streams in the Susquehanna River Basin: 2021 Monitoring Data Summary Update Fish Environmental Lower Susquehanna American Eels
2022 Susquehanna River Basin Commission Annual Report 2022 Commission Documents Annual Reports
2022 Water Resources Program Other Commission Documents
2022 Susquehanna River Basin Commission Financial Statements for the Year Ended June 30, 2022 and Independent Auditor's Report Other Commission Documents
2022 Commission By-Laws Other Commission Documents
2022 Continuous Instream Monitoring Story Map Continuous Monitoring (CIM) Monitoring
2021 Restoration Monitoring of American Eel in Three Southcentral Pennsylvania Streams in the Susquehanna River Basin (2015-2020) Fish Environmental Lower Susquehanna American Eels
2021 Susquehanna River Basin Commission Annual Report 2021 Commission Documents Annual Reports
2021 Susquehanna River Basin Commission Financial Statements for the Year Ended June 30, 2021 and Independent Auditor's Report Other Commission Documents
2021 2021 Nutrients & Suspended Sediment in the Susquehanna River Basin Water Quality Nutrients Sediment Chesapeake Bay Monitoring Nutrients and Suspended Sediment in the Susquehanna River Basin
2021 Comprehensive Plan Other Commission Documents
2020 Large River Monitoring Project: Fish Surveys 2016-2019 Water Quality Monitoring Fish Large River Assessment Project
2020 Susquehanna River Basin Commission Annual Report 2020 Commission Documents Annual Reports
2020 Susquehanna River Basin Commission Financial Statements for the Year Ended June 30, 2020 and Independent Auditor's Report Other Commission Documents
2020 Water Use Associated With Natural Gas Development In The Susquehanna River Basin: An Update Of Activities Through December 2018 Water Supply Water Use Natural Gas
2020 Development of a Water Quality Index (WQI) for the Susquehanna River Basin Monitoring Environmental Pollutants Nutrients
2019 Susquehanna River Basin Commission Annual Report 2019 Commission Documents Annual Reports
2019 Susquehanna River Basin Commission Financial Statements for the Year Ended June 30, 2019 and Independent Auditor's Report Other Commission Documents
2019 2018 Nutrients & Suspended Sediment in the Susquehanna River Basin Water Quality Nutrients Sediment Chesapeake Bay Monitoring Nutrients and Suspended Sediment in the Susquehanna River Basin
2019 Investigating Low Flow Augmentation Impacts on Whitney Point Lake and Adjacent Rivers from 2008-2017: A 10-Year Review Upper Susquehanna Low Flow Water Availability Water Use
2019 Flood Inundation Maps for Swatara Creek, Dauphin County, Pennsylvania, November 2019 Lower Susquehanna Flooding Mitigation
2019 Flood Inundation Maps for Elmira, Corning, Chemung, and Erwin, New York, November 2019 Chemung Flooding Mitigation
2019 Summary of Water Quality Monitoring Activities in the Chiques Creek Watershed: 2015-2019 Lower Susquehanna Monitoring Watershed Study Environmental
2019 Remote Water Quality Monitoring Network-PA Dept of Conservation & Natural Resources Technical Summary 2019 Continuous Monitoring (CIM) Monitoring
2019 Commission Response to PA Auditor General's Performance Audit Report Other Commission Documents
2019 Lower Susquehanna River Subbasin Year 1 Survey, 2017 Water Quality Monitoring Subbasin Survey (Year 1)
2018 Susquehanna River Basin Commission Annual Report 2018 Commission Documents Annual Reports
2018 2017 Nutrients and Suspended Sediment in the Susquehanna River Basin Water Quality Nutrients Sediment Chesapeake Bay Monitoring Nutrients and Suspended Sediment in the Susquehanna River Basin
2018 Susquehanna River Basin Commission Financial Statements for the Year Ended June 30, 2018 and Independent Auditor's Report Other Commission Documents
2018 PA Auditor General's Performance Audit Report - Susquehanna River Basin Commission Other Commission Documents
2017 2016 Nutrients and Suspended Sediment in the Susquehanna River Basin Water Quality Nutrients Sediment Chesapeake Bay Monitoring Nutrients and Suspended Sediment in the Susquehanna River Basin
2017 Susquehanna River Basin Commission Financial Statements for the Year Ended June 30, 2017 and Independent Auditor's Report Other Commission Documents
2017 2015 Nutrients and Suspended Sediment in the Susquehanna River Basin Water Quality Nutrients Sediment Chesapeake Bay Monitoring Nutrients and Suspended Sediment in the Susquehanna River Basin
2017 Estimation of Suspended Sediment Concentrations and Loads Using Continuous Turbidity Data Monitoring Water Quality Passby Flow Sediment
2017 Evaluation of Reference Gages for Passby Flow Determinations and Monitoring in the Susquehanna River Basin Water Supply Water Use Passby Flow
2017 Susquehanna River Basin Commission Annual Report 2017 Commission Documents Annual Reports
2016 Susquehanna River Basin Commission Financial Statements for the Year Ended June 30, 2016 and Independent Auditor's Report Other Commission Documents
2016 Continuous Water Quality Trends Adjusted for Seasonality and Streamflow in the Susquehanna River Basin Water Quality Monitoring Continuous Monitoring (CIM)
2016 West Branch Susquehanna River Subbasin Year-1 Survey, April through August 2015 Water Quality Monitoring Subbasin Survey (Year 1)
2016 Cumulative Water Use and Availability Study for the Susquehanna River Basin Water Supply Water Use Water Availabilty
2016 Water Use Associated with Natural Gas Development: An Assessment of Activities Managed by the Susquehanna River Basin Commission - July 2008 – December 2013  Water Supply Water Use Natural Gas
2016 Susquehanna River Basin Commission Annual Report 2016 Commission Documents Annual Reports
2015 Susquehanna River Basin Commission Financial Statements and Compliance Report June 30, 2015 Other Commission Documents
2015 2014 Nutrients and Suspended Sediment in the Susquehanna River Basin Water Quality Nutrients Sediment Chesapeake Bay Monitoring Nutrients and Suspended Sediment in the Susquehanna River Basin
2015 2013-2014 Susquehanna Large River Assessment Project Water Quality Monitoring Large River Assessment Project
2015 Biological and Water Quality Assessment of the Lower Susquehanna River: New Cumberland, PA (RM 69) to Conowingo, MD (RM 10), June to August 2014 Water Supply Reservoir
2015 Chemung River and Upper Susquehanna Combined Subbasin Survey Year-2 Water Quality Monitoring Subbasin Survey (Year 2)
2015 Remote Water Quality Monitoring Network Data Report of Baseline Conditions 2010-2013 Water Quality Monitoring Continuous Monitoring (CIM) Natural Gas
2015 Susquehanna River Basin Commission Annual Report 2015 Commission Documents Annual Reports
2014 Susquehanna River Basin Commission Audit Results June 30, 2014 Other Commission Documents
2014 Middle Susquehanna Subbasin Year-1 Survey: A Water Quality and Biological Assessment, April Through October 2014 Water Quality Monitoring Subbasin Survey (Year 1)
2014 2013 Nutrients and Suspended Sediment in the Susquehanna River Basin  Water Quality Nutrients Sediment Chesapeake Bay Monitoring Nutrients and Suspended Sediment in the Susquehanna River Basin
2014 Assessment of Interstate Streams in the Susquehanna River Basin, Monitoring Report No. 27, January 1, 2013 to December 31, 2013 Water Quality Monitoring Fish Assessment of Interstate Streams
2014 Susquehanna River Basin Flow Monitoring Network Technical Summary - 2013 Water Quality Monitoring Low Flow
2014 Upper Susquehanna River Subbasin Year-1 Survey: A Water Quality and Biological Assessment, May-August 2013 Water Quality Monitoring Subbasin Survey (Year 1)
2014 Whitney Point Adaptive Management Plan Water Supply Reservoir Low Flow Environmental
2013 The State of the Susquehanna 2013 Report Water Quality Water Use Drought Sediment State of the Susquehanna Fish
2013 2011-2012 Susquehanna Large River Assessment Project Water Quality Monitoring Large River Assessment Project
2013 2012 Nutrients and Suspended Sediment in the Susquehanna River Basin Water Quality Nutrients Sediment Chesapeake Bay Monitoring Nutrients and Suspended Sediment in the Susquehanna River Basin
2013 Assessment of Interstate Streams in the Susquehanna River Basin, Monitoring Report No. 26, January 1, 2012 to December 31, 2012 Water Quality Monitoring Fish Assessment of Interstate Streams
2013 Bear Run Watershed Renaissance Mine Drainage Restoration Project Water Quality Mine Drainage
2013 Chemung River Subbasin Year-1 Survey: A Water Quality and Biological Assessment, June-July 2012 Water Quality Monitoring Subbasin Survey (Year 1)
2013 Lower Susquehanna River Subbasin Year-2 Focused Watershed Study: A Water Quality and Biological Assessment of the Lower Reservoirs of the Susquehanna River Other Watershed Study Subbasin Survey (Year 2)
2013 Remote Water Quality Monitoring Network Data Report of Baseline Conditions 2010-2012: A Summary Water Quality Monitoring Continuous Monitoring (CIM) Natural Gas
2013 Susquehanna River Basin Flow Monitoring Network Technical Summary - 2012 Water Quality Monitoring Low Flow
2012 2011 Nutrients and Suspended Sediment in the Susquehanna River Basin Water Quality Nutrients Sediment Chesapeake Bay Monitoring Nutrients and Suspended Sediment in the Susquehanna River Basin
2012 Assessment of Interstate Streams in the Susquehanna River Basin, Monitoring Report No. 25, January 1, 2011 to December 31, 2011 Water Quality Monitoring Fish Assessment of Interstate Streams
2012 Low Flow Monitoring Pilot Study: An Assessment of Habitat, Water Quality, and Biological Responses to Low Flow Conditions in the Juniata River Subbasin in 2010 and 2011 Water Quality Monitoring Low Flow
2012 Lower Susquehanna River Subbasin Year-1 Survey: A Water Quality and Biological Assessment, April-July 2011 Water Quality Monitoring Subbasin Survey (Year 1)
2012 Remote Water Quality Monitoring Network Summary Data Report of Baseline Conditions for 2010-2011 Water Quality Monitoring Continuous Monitoring (CIM) Natural Gas
2011 2010 Nutrients and Suspended Sediment in the Susquehanna River Basin Water Quality Nutrients Sediment Chesapeake Bay Monitoring Nutrients and Suspended Sediment in the Susquehanna River Basin
2011 2010 Susquehanna Large River Assessment Project Water Quality Monitoring Fish Large River Assessment Project
2011 Anthracite Region Mine Drainage Remediation Strategy Water Quality Mine Drainage
2011 Assessment of Interstate Streams in the Susquehanna River Basin, Monitoring Report No. 24, January 1, 2010 to December 31, 2010 Water Quality Monitoring Fish Assessment of Interstate Streams
2011 Juniata River Subbasin Year-1 Survey: A Water Quality and Biological Assessment, June and July 2010  Water Quality Monitoring Subbasin Survey (Year 1)
2011 Morrison Cove Water Resources Availability Study Water Supply Water Use Water Availabilty
2011 West Branch Susquehanna Subbasin Year-2 Survey Summary Report: An Assessment of the Abandoned Mine Drainage Impacts in Drury Run and Birch Island Run, Clinton County, PA Other Watershed Study Mine Drainage Subbasin Survey (Year 2)
2010 Assessment of Interstate Streams in the Susquehanna River Basin, Monitoring Report No. 23, January 1, 2009 to December 31, 2009 Water Quality Monitoring Fish Assessment of Interstate Streams
2010 Middle Susquehanna Subbasin Year-2 Survey: Small Watershed Study: Lackawanna River, An Assessment of Water Quality in Base Flow and Stormflow Conditions, April 2009-April 2010 Other Watershed Study Subbasin Survey (Year 2)
2010 Nutrients and Suspended Sediment Transported in the Susquehanna River Basin, 2009, and Trends, January 1985 Through December 2009 Water Quality sediment Nutrients Chesapeake Bay Nutrients and Suspended Sediment in the Susquehanna River Basin
2010 Susquehanna Large River Assessment Project Water Quality Monitoring Large River Assessment Project
2010 West Branch Susquehanna Subbasin Year-1 Survey Summary Report: A Water Quality and Biological Assessment, March-July 2009 Water Quality Monitoring Subbasin Survey (Year 1)
2009 Assessment of Interstate Streams in the Susquehanna River Basin, Monitoring Report No. 21, July 1, 2007 to December 31, 2008  Water Quality Monitoring Fish Assessment of Interstate Streams
2009 Middle Susquehanna Subbasin Survey: A Water Quality and Biological Assessment, June-October 2008 Water Quality Monitoring Subbasin Survey (Year 1)
2009 Nutrients and Suspended Sediment Transported in the Susquehanna River Basin, 2008, and Trends, January 1985 Through December 2008 Water Quality sediment Nutrients Chesapeake Bay Nutrients and Suspended Sediment in the Susquehanna River Basin
2009 Susquehanna Large River Assessment Project Water Quality Monitoring Large River Assessment Project
2009 Upper Susquehanna Subbasin Small Watershed Study: A Water Quality and Biological Assessment of the Watersheds Surrounding Whitney Point Lake, Broome and Cortland Counties, N.Y. Other Watershed Study
2008 Assessment of Interstate Streams in the Susquehanna River Basin, Monitoring Report No. 20, July 1, 2006 Through June 30, 2007 Water Quality Monitoring Fish Assessment of Interstate Streams
2008 Chemung Subbasin Small Watershed Study: Cohocton River, A Water Quality and Biological Assessment, April 2007 - February 2008 Water Quality TMDL
2008 Conestoga River Watershed Total Maximum Daily Loads Development: An Interim Data Report Locations Conestoga
2008 Consumptive Use Mitigation Plan Water Supply Water Use Mitigation Low Flow
2008 Deer Creek Water Availability Study Water Supply Water Use Water Availabilty
2008 Nutrients and Suspended Sediment Transported in the Susquehanna River Basin, 2007, and Trends, January 1985 Through December 2007 Water Quality sediment Nutrients Chesapeake Bay Nutrients and Suspended Sediment in the Susquehanna River Basin
2008 Susquehanna Large River Assessment Project Water Quality Monitoring Large River Assessment Project
2008 Upper Susquehanna Subbasin Survey: A Water Quality and Biological Assessment, June - September 2007 Water Quality Monitoring Subbasin Survey (Year 1)
2008 West Branch Susquehanna Subbasin AMD Remediation Strategy: Background, Data Assessment and Method Development Water Quality Mine Drainage
2007 Assessment of Interstate Streams in the Susquehanna River Basin, July 1, 2005 Through June 30, 2006 Water Quality Monitoring Fish Assessment of Interstate Streams
2007 Chemung Subbasin Survey: A Water Quality and Biological Assessment, June-August 2006  Water Quality Monitoring Subbasin Survey (Year 1)
2007 Lower Susquehanna Subbasin Small Watershed Study: Yellow Breeches Creek, A Bacteriological Assessment, February-November 2006  Other Watershed Study
2007 Nutrients and Suspended Sediment Transported in the Susquehanna River Basin, 2006, and Trends, January 1985 Through December 2006 Water Quality sediment Nutrients Chesapeake Bay Nutrients and Suspended Sediment in the Susquehanna River Basin
2006 Assessment of Interstate Streams in the Susquehanna River Basin, Monitoring Report No. 19, July 1, 2004 Through June 30, 2005 Water Quality Monitoring Fish Assessment of Interstate Streams
2006 Conowingo Pond Management Plan Water Supply Water Use Water Availability Drought Reservoir
2006 Juniata River Subbasin Small Watershed Study: Morrison Cove, A Water Quality and Biological Assessment, April 2005-February 2006 Water Quality Nutrients
2006 Lower Susquehanna Subbasin Survey: A Water Quality and Biological Assessment, June-November 2005 Water Quality Monitoring Subbasin Survey (Year 1)
2006 Nutrients and Suspended Sediment Transported in the Susquehanna River Basin, 2005, and Trends, January 1985 Through December 2005 Water Quality sediment Nutrients Chesapeake Bay Nutrients and Suspended Sediment in the Susquehanna River Basin
2006 Pennsylvania Agricultural Consumptive Water Use Study Water Supply Water Use Mitigation Agriculture
2006 Susquehanna Large River Assessment Project Water Quality Monitoring Large River Assessment Project
2005 Assessment of Interstate Streams in the Susquehanna River Basin, Monitoring Report No. 18, July 1, 2003 Through June 30, 2004 Water Quality Monitoring Fish Assessment of Interstate Streams
2005 Comprehensive Analysis of the Sediments Retained Behind Hydroelectric Dams on the Lower Susquehanna River Water Quality Sediment Reservoir Environmental Nutrients Pollutants
2005 Groundwater Management Plan for the Susquehanna River Basin (June 2005) Executive Summary Water Supply Groundwater Water Availability
2005 Juniata River Subbasin Survey: A Water Quality and Biological Assessment, June-November 2004  Water Quality Monitoring Subbasin Survey (Year 1)
2005 Northern Lancaster County Groundwater Study: A Resource Evaluation of the Manheim-Lititz and Ephrata Area Groundwater Basins Water Supply Water Use Water Availabilty Groundwater
2005 Nutrient and Suspended Sediment Transported in the Susquehanna River Basin, 2004, and Trends, January 1985 Through December 2004  Water Quality Sediment Nutrients Chesapeake Bay
2005 West Branch Susquehanna River Subbasin Small Watershed Study: Morgan Run Watershed - A Water Quality and Biological Assessment, November 2003-September 2004 Other Watershed Study Mine Drainage
2004 Assessment of Interstate Streams in the Susquehanna River Basin, Monitoring Report No. 17, July 1, 2002 Through June 30, 2003 Water Quality Monitoring Fish Assessment of Interstate Streams
2004 Middle Susquehanna River Subbasin Small Watershed Study: Wyalusing Creek Watershed - A Water Quality and Biological Assessment, October 2002-September 2003 Other Watershed Study
2004 Nutrient and Suspended Sediment Transported in the Susquehanna River Basin, 2003, and Trends, January 1985 Through December 2003 Water Quality Sediment Nutrients Chesapeake Bay Nutrients and Suspended Sediment in the Susquehanna River Basin
2003 Assessment of Interstate Streams in the Susquehanna River Basin, Monitoring Report No. 16, July 1, 2001 Through June 30, 2002 Water Quality Monitoring Fish Assessment of Interstate Streams
2003 Native American Waterbody and Place Names Within the Susquehanna River Basin and Surrounding Areas Other Historical
2003 Nutrient and Suspended Sediment Transported in the Susquehanna River Basin, 2002, and Trends, January 1985 Through December 2002 Water Quality Sediment Nutrients Chesapeake Bay
2003 Susquehanna River Pilot Study: Large River Assessment Project Water Quality Monitoring Large River Assessment Project
2003 Watershed Assessment and Remediation Strategy for Abandoned Mine Drainage in the Upper Tioga River Watershed Water Quality Mine Drainage
2003 West Branch Susquehanna Subbasin Survey, A Water Quality and Biological Assessment, July-November 2002 Water Quality Monitoring Subbasin Survey (Year 1)
2002 Assessment of Interstate Streams in the Susquehanna Basin Water Quality Monitoring Fish Assessment of Interstate Streams
2002 Middle Susquehanna Subbasin Survey, A Water Quality and Biological Assessment, July-September 2001 Water Quality Monitoring Subbasin Survey (Year 1)
2002 Nutrients and Suspended Sediment Transported in the Susquehanna River Basin, 2001, and Trends, January 1985 through December 2001 Water Quality sediment Nutrients Chesapeake Bay Nutrients and Suspended Sediment in the Susquehanna River Basin
2002 Sediment Task Force Recommendations Water Quality Sediment Nutrients Reservoir
2002 Use of a Constructed ReedBed Wetland in Mitigation of Highway Runoff on the Ground-Water Quality in Carbonate Rock Area Other Best Management Practices (BMPs)
2001 Assessment of Interstate Streams in the Susquehanna River Basin Monitoring Report No. 14, July 1, 1999 Through June 30, 2000 Water Quality Monitoring Fish Assessment of Interstate Streams
2001 Nutrients and Suspended Sediment Transported in the Susquehanna River Basin, 1999  Water Quality sediment Nutrients Chesapeake Bay Nutrients and Suspended Sediment in the Susquehanna River Basin
2001 Nutrients and Suspended Sediment Transported in the Susquehanna River Basin, 2000, and Trends, January 1985 through December 2000 Water Quality sediment Nutrients Chesapeake Bay Nutrients and Suspended Sediment in the Susquehanna River Basin
2001 Upper Susquehanna Subbasin Report Water Quality Monitoring
2000 Assessment of Interstate Streams in the Susquehanna River Basin, Monitoring Report No. 13, July 1, 1998 Through June 30, 1999 Water Quality Monitoring Fish Assessment of Interstate Streams
2000 Drought Coordination Plan Water Supply Drought
1999 Water Balance for the Jeddo Tunnel Basin, Luzerne County, Pennsylvania Mine Drainage Water Quality Middle Susquehanna
1999 Surface Overflows of Abandoned Mines in the Eastern Middle Anthracite Field Mine Drainage Water Quality Middle Susquehanna
1999 Assessment of Conditions Contributing Acid Mine Drainage to the Little Nescopeck Creek Watershed, Luzerne County, PA and an Abatement Plan to Mitigate Impaired Water Quality in the Watershed Water Quality Mine Drainage
1999 Assessment of Interstate Streams in the Susquehanna River Basin, Monitoring Report No. 12, July 1, 1997 Through June 30, 1998 Water Quality Monitoring Fish Assessment of Interstate Streams
1999 Nutrients and Suspended Sediment Transported in the Susquehanna River Basin, 1997  Water Quality sediment Nutrients Chesapeake Bay Nutrients and Suspended Sediment in the Susquehanna River Basin
1999 Upper Susquehanna Subbasin-A Water Quality and Biological Assessment Water Quality Monitoring Subbasin Survey (Year 1)
1999 Wiconisco Creek Watershed Assessment and Plan Other Watershed Study
1998 The 1998 Susquehanna River Basin Water Quality Assessment 305(b) Report Other Best Management Practices (BMPs)
1998 Effects of Streambank Fencing on Stream Ecosystem Integrity Other Best Management Practices (BMPs)
1998 Instream Flow Studies, Pennsylvania and Maryland Ecosystems Instream Flow Environmental Water Use Passby Flow
1998 Nutrients and Suspended Sediment Transported in the Susquehanna River Basin, 1994-96, and Loading Trends, Calendar Years 1985-96 Water Quality sediment Nutrients Chesapeake Bay Nutrients and Suspended Sediment in the Susquehanna River Basin
1998 Use of a Field Drain and an Artificial Wetland to Minimize Groundwater Contamination From an Agricultural Site Other Best Management Practices (BMPs)
1998 Water Quality and Biological Assessment of the Chemung Subbasin Water Quality Monitoring
1998 Water Quality and Biological Assessment of the Wiconisco Creek Watershed Other Watershed Study
1998 Water Quality of Interstate Streams in the Susquehanna River Basin, Monitoring Report No. 11, July 1, 1996 Through June 30, 1997 Water Quality Monitoring Assessment of Interstate Streams
1972 Susquehanna River Basin Compact Other Commission Documents