Consideration and Approval of Contract: Ratify the Subrecipient Agreement with the Federal Emergency Management Agency through the Arizona Department of Emergency and Military Affairs for the Sunnyside Neighborhood Flood Mitigation/ Killip Basin Outlet Project.
 

The Federal Emergency Management Agency through the Arizona Department of Emergency and Military Affairs has approved the grant application and awarded a Subrecipient Agreement for the Hazard Mitigation Grant Program for the Sunnyside Neighborhood Flood Mitigation/Killip Basin Outlet project.  The grant covers eligible costs from April 29, 2025 to March 2026.

The project will provide flood mitigation for the Sunnyside neighborhood that has been heavily impacted by post-wildfire flooding due to the 2019 Musueum Fire.  

Project Name: Sunnyside Neighborhood Flood Mitigation/Killip Basin Outlet 
Cost: $1,665,000 (Federal Share) / $185,000 (Non-Federal Share)
Account Number Budgeted:  410-08-385-3580-3-4442
FY Budgeted Amount: FY2024-25 $117,491 & FY2025-26 $760,061
Grant Funded: Yes
Funding Source: Arizona Department of Emergency and Military Affairs, Hazard Mitigation Grant Program

No

1. Ratify the Agreement to authorize the Arizona Department of Emergency and Military Affairs to provide the City of Flagstaff $1,665,000.
2. Do not approve the ratification of the Agreement, thereby foregoing the $1,665,000.  This option is not recommended by staff.

On July 21, 2019, the Museum Fire broke out in the Dry Lake Hills area just above Flagstaff within the Coconino National Forest. The fire ultimately charred 1,961 acres, including a significant portion of the Spruce Wash Watershed. Flood modeling subsequently showed potential flood risk to neighborhoods in Coconino County and the City of Flagstaff. Throughout the summer of 2021,monsoon rain events impacted the Museum bum scar and caused multiple rounds of flash flooding in Flagstaff neighborhoods. In the November 2022 election, voters approved Proposition 441 with support from 76% of Flagstaff voters. The Proposition invests $57 million in City of Flagstaff wildfire suppression, stormwater flood mitigation and wastewater treatment infrastructure. Specifically, $26 million of this funding will be used to fund stormwater infrastructure improvements in the Spruce Wash area to lessen the impacts of flooding in affected neighborhoods.  The development of the Spruce Wash Technical Feasibility Study Phase I and Phase II conducted by Peak Engineering identified eight Projects to be constructed with the $26 million in funding from Prop 441 to mitigate post-wildfire flooding in the Spruce Wash.

This grant funded Spruce Wash - Sunnyside Neighborhood Flood Mitigation/Killip Basin Outlet improvement will construct an additional basin outlet at the southwest corner of Killip Regional Detention Basins and direct 80 cfs to 160 cfs of design storm peak flow detained in the basin away from the Spruce Wash storm drain and toward an alternate flow path at the West Wash storm drain. This improvement will optimize peak flow capacity of the Spruce Wash storm drain and reduce flood hazards in the Sunnyside neighborhood east and south of the detention basins.

High Performing Governance - Enhance the organization's fiscal stability and increase efficiency and effectiveness.
Sustainable, Innovative Infrastructure - Deliver outstanding services to residents through a healthy, well maintained infrastructure systesm.

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