Evaluation of flood mitigation solutions

 Hi Neighbors,

My father-in-law is a semi-retired civil engineer, who's worked on fresh and waste water systems worldwide.  Bottom line, he's an expert on the subject, and he was happy to come out and walk around the Rim with me before the meeting at the fire station Wednesday September 14th.

We looked at Brewster Lake, the weir, the drain pipe to the infiltration pond, and the properties where the King County Homes were torn down prior to attending the meeting.

With his more than 30 years of experience, my F-in-L says the only way to prevent future flooding is by getting rid of the water, and the only way to do that is with a drain pipe from Brewster Lake to the hillside south of the Rim that would percolate through the Forrest into Rattlesnake lake.

Rattlesnake is 100 feet lower than Brewster.

Keep in mind, the initial 18" gravity pipe from the infiltration pond was rejected due to cost which was high because of length and excavation depth.

But rather than running all the way to Cedar Falls Road, heading south toward Rattlesnake cuts the distance by more than 2/3rd, an we'd only have to micrortunnel a short distance.  We'd be looking at about $120.00 per foot for a 30" drain pipe and we could mostly run down the existing road (I know don't tear up the brand new road).

I'll definitely be pushing the county on a feasibility study for this option.

The biggest challenge will be political with the city of Seattle Water department, so I contacted Kathy Lambert's office to see if they'd support us, see the next post for those details.

Best regards,
Dan Covey MPM, PMP
425-785-4217

If Ability is the Engine, Attitude is the Transmission.