Developing Sinkhole in Dayton Ave N. at 122nd Street

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Pedersen, Alex

Sep 20, 2021, 9:25:36 AMSep 20
to Lee Bruch,, Juarez, Debora, Davis, Malik
Thank you for adding me to the thread to alert me to this. 

As the Chair of the Committee that monitors both SPU and SDOT, I’ll inquire with SPU and cc SDOT and the district Councilmember. Also, the location you note  (southbound lane of Dayton Ave. at N 122nd Street) appears to be in Council District 5 so I’m looping in the office of Councilmember Debora Juarez and moved CM Strauss to bcc so he knows I replied. 


Alex Pedersen
City Councilmember
District 4, Seattle, WA
Office: 206.684.8804

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From: Lee Bruch <>
Date: September 19, 2021 at 3:27:26 PM PDT
To:, "Pedersen, Alex" <>, "Strauss, Dan" <>
Subject: Developing Sinkhole Re: Should anyone be surprised? Re: Hole in Dayton Ave N. Look out Kids!

CAUTION: External Email
I question whether that's due to a broken culvert (which would imply it's one of the culverts that carries a watercourse under the road - there are none nearby). There are only 2 utilities shown on the city's SPU website at that location: 

A waterline runs under the east side of the road (you can see where from the maintenance hole at 122th - the line runs straight under Dayton  from there
A sewer line (combined sanitary and storm sewer) runs slightly west of the centerline of the road (you can see where from the maintenance hole at 122th and another at midblock- the line runs straight under Dayton from there.
And of course, each house along the road has both a house water line and a side sewer connecting to the mains.

My speculation is that it's a leak from any of the above (the water or sewer main or a house's water or sewer connection) that's carving out a void under the road.
The void will keep getting larger until the appropriate pipe is fixed regardless of what is done at the road surface. Those can require a fair amount of work when caught early (like now), but those sorts of voids keep growing until a sinkhole develops if not attended to.

I've added the chair and vice chair of Council's Transportation & Utilities Committee to this thread.

Lee Bruch

    206-355-4282 cell & text

From: 'Brent McFarlane' via Greenwood-Phinney Greenways <>
Sent: Sunday, September 19, 2021 2:45 PM
To: Greenwood-Phinney Greenways Google Group <>
Subject: Re: Should anyone be surprised? Re: Hole in Dayton Ave N. Look out Kids!
In so many words ‘yes we have’ and that was SPU who did the repair job, removed the cones and left it in a precarious condition. Today SPU generated a new work order - put sand bags in as a temp measure.  They’ve noted there is a broken culvert underneath the road. Let’s hope they will repair that ‘underlying problem’ before the serious rains hit.

Sent from my iPhone

> On Sep 19, 2021, at 12:14 PM, Douglas MacDonald <> wrote:

> Unbelievable? No. All too believable!  

> A city bureaucracy badly out of touch with its basic responsibilities to its citizens/taxpayers.   

> Brent: Have you been the recipient of one of those “Thanks for telling us. Maybe we’ll get to it someday” notifications?

>> On Sep 19, 2021, at 12:01 PM, 'Brent McFarlane' via Greenwood-Phinney Greenways <> wrote:
>> Southbound lane of Dayton Ave. at N 122nd.
>> At least 20” depth and 15” diameter.
>> Called in to SPU for a repair back in mid June. No estimated repair time from SPU or from SDOT. Dangerous for bikes and pedestrians.
>> You can see where a very superficial short term repair has fallen into the void. This has been called in at least 3 times now. This arterial was ‘resurfaced’ with no right of way improvements nor drainage improvements, 3 years ago.

Lee Bruch

Sep 20, 2021, 1:38:58 PMSep 20
to Greenwood-Phinney Greenways Google Group
Here is the only response Ive ever gotten from CM Petersen on any topic.
He is response about the hole on Dayton is below

Lee Bruch
Via clumsy thumbs on my iPhone

Begin forwarded message:

From: "Pedersen, Alex" <>
Date: September 20, 2021 at 6:25:37 AM PDT
To: Lee Bruch <>
Cc:, "Juarez, Debora" <>, "Davis, Malik" <>
Subject: Developing Sinkhole in Dayton Ave N. at 122nd Street

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Brent McFarlane

Sep 20, 2021, 2:05:52 PMSep 20
to, Lee Bruch
LOL. And of course he punts it to D5 like we don’t know what district we’re in. I’m sure Juarez will be a big help. 
The last time I raised a road / RoW condition issue with her office, she said “I’m not SDOT!”. She’s just too busy getting ready for Hockey season and more photo ops with Durkan.

Sent from my iPhone

On Sep 20, 2021, at 10:39 AM, Lee Bruch <> wrote:

Here is the only response Ive ever gotten from CM Petersen on any topic.
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