These data sets have been developed to provide preliminary hydraulic culvert models designed to convey the 10- and 4-percent annual exceedance probability (AEP) flood flows based on Massachusetts Department of Transportation highway functional classification and associated hydraulic design flow (2020) and to meet the Massachusetts Stream Crossing Standards (SCS) developed by River and Stream Continuity Partnership (2006).
The Microsoft Excel file “Hydraulic_Model_Data_Summary.xlsx” contains data tables that summarize and compare the SCS and preliminary culvert designs for the field survey and GIS derived data. The data for the existing culvert designs are also provided in this document.
The data release child item titled “Hydraulic Model Files for Selected Stream Crossing Sites in the Squannacook River Basin, North-Central Massachusetts” contains the HEC-RAS model files.
The data release child item titled named “Survey Data for Hydraulic Models at Selected Stream Crossing Sites in the Squannacook River Basin, North-Central Massachusetts” contains field survey data collected in 2021.
References:
River and Stream Continuity Partnership, 2006, Massachusetts river and stream crossing standards: revised version March 1, 2011 and corrected March 8, 2012, accessed on October 28, 2021 at https://www.mass.gov/doc/massachusetts-river-and-stream-crossing-standards
Massachusetts Department of Transportation, 2020, Load and resistance factor design (LRFD) Bridge Manual – Part I, Chapter 1 bridge site exploration, January 2020 revision, 26 p, accessed October 1, 2021 at https://www.mass.gov/doc/chapter-1-bridge-site-exploration/download