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Museum fire flood mitigation on track for monsoon season | Local

The various flood mitigation projects related to the museum fire scar are on track to be completed before the monsoon season, according to updates presented to Flagstaff City Council at Tuesday’s meeting.

With the exception of one project, all others have been reported as progressing on schedule and are expected to be completed by July 1 or sooner. There are also upcoming volunteer events through which community members can contribute to monsoon mitigation and preparedness efforts.


The City of Flagstaff’s financial discussion group has met weekly and is creating processes to “track expenses related to flood mitigation preparations and potential response” as they are charged to the city’s stormwater fund. city, said director of management services Rick Tadder.

“That’s where we’re going to bill the majority of things,” Tadder said.

They were “primarily focused on pre-monsoon action,” Tadder added, and identified the need for a city investment of up to $350,000 in preparation costs.

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The hope is that it will be at least several years before the city experiences similar flooding as 2021, but Tadder said they are already planning financially in case 2022 brings more flooding. The focus group is also working to identify other sources of funding.


With funds from the Department of Forestry and Fire Management, the City of Flagstaff was able to order new flood management and response equipment.

Development engineer Gary Miller reported that the city received delivery of four portable digital message boards, three light plants and traffic barricades (including 1,100 traffic cones). They expect delivery of a Combo vacuum truck for culvert cleaning by the end of August. They have also ordered a mini excavator and trailer, two vehicle-mounted traffic signs, 200,000 empty sandbags and a manual sandbag machine, but delivery time for these items is uncertain.

Crossing Dortha

The Dortha Crossing project includes a box culvert and open construction.

Contractor Tiffany Construction “moved quickly to the field,” said Christine Cameron, manager of the capital improvement project. Grading of the open channel between Cedar and Dortha is “half complete”, with shotcrete pouring scheduled for the week of June 20.

For the culvert, “the shoring is in place,” Cameron said, the floor was poured Tuesday and the walls are expected to be poured the week of June 13.

The scupper “cover” will likely be installed the first week of July. In total, the Dortha Crossing project is expected to cost around $2.6 million.

Killip retention ponds

The Killip School retention pond project is “in its final stage of development,” said Scott Overton, director of public works.

Both basins are at their “final level” and the spillway structure is nearing completion. Fencing entered on Tuesday and landscaping elements such as trees are “coming soon”.

The project had “cost overruns” due to rock work and unscheduled utility work, Overton said, but overall “the project looks very good.”

It is in a position to be completed early potentially – by the third week of June.

Killip Creek at Ponderosa Park

The entrance structure to Ponderosa Park will allow flood management to “take full advantage of Killip’s retention ponds,” Miller said.

This project is being funded by an environmental infrastructure grant – worth about $1.5 million – but the city is “struggling to get an answer” from the granting agency as to when that money will be available. The entrance structure project is still ongoing, with the city working alongside the parks department to come up with a transportation structure design that “works with the rest of the park and what the park was intended for.” Next steps include removing equipment from the park that is no longer in use and removing barriers that are currently stored in the park.

Route 66 Canal / FUTS Crossing

Sediment and debris from the flood a year ago has been completely removed from the channel between Route 66 and the BNSF railroad, stormwater manager Ed Shanks reported. A railroad crossing in Flagstaff’s urban pathway system was also repaired with a 2019 FEMA pre-disaster grant.

“Just to give you an idea of ​​how fast FEMA got us this grant in 2019,” Shanks said. “We got the funding this year.”

Mitigation in the forest

The mitigation and restoration of watersheds in the Coconino National Forest are “progressing very well,” said Lucinda Andreani, deputy county executive.

Alluvial fan work on the western tributary is expected to be completed by July 1. The “Paradise Fan” closer to Paradise Street is expected to be completed “probably by the end of next week”.

A small portion of the main tributary has also been restored, but a “significant” portion of this tributary has been closed to construction due to seasonal Mexican spotted owl habitat protections.

“The rest will be built this fall” when the restrictions are lifted, Andreani said.

Mitigation within Mount Elden Estates, which includes construction of low water crossings and level control, is “85% complete” and “expected to be completed within the next two to three weeks”. In the area known as the “40 acre parcel”, level control and alluvial fan work is expected to be completed by the end of next week.

Sedimentary basins of the boardwalk

The Parkway Sedimentary Basin project is “in motion” but will not be delivered by July 1. From the start, the project has been challenged by complex legal jurisdictions in the proposed area.

“Next month hopefully we’ll have a little more information about the Parkway pools,” Overton said.

Flood warning siren system

Installation of the flood warning siren systems began on Tuesday, and residents can expect to see “poles going up this week,” Overton said. The systems have been transferred to rely on solar energy.

On-site testing is expected to take place in the coming weeks, and county emergency management is in the process of integrating the siren software into the county’s emergency notification system.

Events to come

There are two upcoming volunteer events on Saturday and June 18 that will be primarily focused on helping residents clean up sandbags in their neighborhoods. The city has also opened a service request line at (928)-213-2102, open 8 a.m. to 4 p.m. Monday through Friday, where residents can request assistance with sandbagging walls.