This model archive summary (MAS) document and model calibration dataset describes a surrogate model used to compute suspended sediment concentrations at USGS streamgage 11509500 for water years 2019-2024. The methods used follow USGS guidance as referenced in Office of Surface Water (OSW)/Office of Water Quality (OWQ) technical memoranda 2016.07 (https://water.usgs.gov/osw/pubs/memo.summaries.html) and USGS techniques and methods, book 3-chapter C4 (doi.org/10.3133/tm3C4).