Title
[Contract Amendment] Basin 151 and 153 Storm Drainage Master Plans
End
FileID
File ID: 2026-01009
End
Location
Location: District 2
End
Recommendation
Recommendation: Pass a Motion authorizing the City Manager or designee to execute Contract Amendment No. 1 to City Agreement 2025-0554 with HDR Engineering, Inc. to convert the existing XPSWMM storm drainage model to a multi-dimensional hybrid model within the FY24 DOU Operating Grant Program (G14240100, Fund 6211), for an amount not to exceed $143,566, bringing the agreement's total not-to-exceed amount to $393,188.11, and extend the contract services through December 31, 2026.
End
Contact
Contact: Gary Gulseth, Project Manager, (916) 808-1415, ggulseth@cityofsacramento.org; Sherill Huun, Engineering & Water Resources Division Manager, (916) 808-1455, shuun@cityofsacramento.org; Dalia Fadl, Director, (916) 808-3765, dfadl@cityofsacramento.org; Department of Utilities
End
Presenter
Presenter: None
End
Attachments
Attachments:
1-Description/Analysis
2-Contract Amendment
End
Description/Analysis
IssueDetail
Issue Detail: Staff recommends City Council approve Contract Amendment No. 1 with HDR Engineering, Inc. to convert the existing one-dimensional (1D) XPSWMM hydraulic storm drainage model for Basins 151 and 153 to a multi-dimensional (1D/2D) hybrid model. The consultant will use the improved model to identify hydraulic deficiencies in the existing drainage system and evaluate remedial alternatives that will bring the system into compliance with public safety and flood performance standards. The proposed 1D/2D hybrid model will simulate rainfall runoff over the complex two-dimensional surface of the basins. This process will provide better insight into flow patterns and flood accumulation and, thus, allow HDR Engineering, Inc. and staff to better identify, and likely reduce, the need and level of improvement alternatives.
End
PolicyConsiderations
Policy Considerations:...
Click here for full text