Progress Reporting

As of December 2010, all BMP information submitted to the Chesapeake Bay Program Office must be in a format compatible with the National Environmental Information Exchange Network (NEIEN) protocols that dictate the use of BMP-specific fields and units. Such information is utilized by CAST for the estimation of nutrient and sediment loads generated by different source areas within the Chesapeake Bay watershed.

River Trends

Scientists calculate flow-adjusted trends in nitrogen, phosphorus and sediment levels to better determine whether pollution has changed over time. You can download the data for nitrogen, phosphorus and sediment from 1990 forward. The data above the River Input Monitoring (RIM) stations has been adjusted for variations in flow by USGS using the Weighted Regressions on Time, Discharge, and Season (WRTDS) model (Moyer and Blomquist, 2018).


The 2010 Chesapeake Bay TMDL for Nitrogen, Phosphorus and Sediment set allocations for the Bay. Major jurisdictions create Watershed Implementation Plans for how to achieve the allocations. The Phase III Watershed Implementation Plans are under development and Interim Expectations have been established. BMPs are expected to be verified. Information on verification is below. 

Federal Agencies

Federal Facility User Guide for Frequently Asked Questions

This simple “How To” document will walk you through seven commonly-asked questions that can be used to determine what information is in the Phase 6 Chesapeake Watershed Model for your federal agency and help you build an effective and efficient implementation plan.

Phase III Watershed Implementation Plans

Federal facilities are developing Phase III Watershed Implementation Plans (WIPs) to show how they will meet the 2010 Chesapeake Bay TMDL for nitrogen, phosphorus and sediment. The WIPs are state-specific documents. Federal facility information will be incorporated into each states' WIP. A Protocol is under development to describe the state-specific processes for setting local area planning goals (LAPGs) for federal agencies. State LAPGs are available here.

To determine if the LAPG is met, create two scenarios in CAST. First create a baseline scenario of the BMPs implemented. Then create a separate scenario that is your plan for 2025. The 2025 scenario should have the current BMPs plus any additional BMPs that you will need to implement. Using Compare Scenarios, you can see the load for the current and 2025 scenario as well as the percent reduction. To determine if you reduced the targeted amount, subtract the baseline load from the 2025 plan. Alternatively, look at the percent reduction to see if you met the target.

Annual Progress Reporting Templates

Federal facilities reporting BMP implementation toward meeting the Chesapeake Bay TMDL are encouraged to use the template specific to each state when reporting. Data are reported to each state, who then merges data from federal facilities and multiple other sources for reporting to the Chesapeake Bay Program.

Any questions on annual progress reporting should be directed to Jeff Sweeney at or 410-267-9844 or the state representatives listed here: Tracking and Reporting Leads and Contact Information by Jurisdiction.


Milestones for 2016 to 2017

A Protocol was established for the 2016 to 2017 Milestones. While not applicable to the Phase III WIPs, that information is below for archival purposes.