After we had demolished the garage and concrete slab underneath it, I happened to come across an article in the Seattle Times that mentioned that the city of Seattle participates in the federally-funded Rainwise program. If your house is in a location that qualifies, you can be eligible for the program to pay up to 100% of the cost of installing a rain garden and/or cistern up to ~$4,500.
Well, my address is eligible, and I was already going to be putting in a garden area, so I thought this could be perfect! Well… not so fast… As with any government-funded program, there are a lot of restrictions and hoops to jump through.
The first is that you have to offset a minimum of 400 sq ft of roof area. I looked at my roof and thought “perfect!” since the area for the most easily accessible downspout to the backyard is 500+ sq ft
AND, this project is actually removing 350+ sq ft of roof by taking out the garage
But… unfortunately the program measures this from a birds-eye perspective and ONLY includes the roof of the house, not any roof structure that may be removed as part of the project. That area is <400 sq ft 😦
It seems a little counter-intuitive to me, and pretty unfortunate since this would be a perfect area!
The other qualification is that the soil has to “perk” to determine what level of rebate / subsidy you will be eligible for. Basically this means that water has to be absorbed into the ground at a certain rate. In order to check for this, you have to dig a hole 2ft deep and 10″ wide and then fill it with water and watch it drain several times over a period of ~7 hours. We dug the hole but haven’t done the test yet since its not looking likely that we would even qualify based on the roof calculations.
I have been talking with a very knowledgeable rainwise contractor, NW Bloom, about this and am hoping that there may be a little room for flexibility on the roofline qualification. I’m not holding my breath though, and I’ll certainly keep you posted!
Update: Unfortunately I won’t qualify for the rainwise program – there is no wiggle room in the square footage calculations (no surprise there). I also started the perk test by filling the hole with 12″ of water for the first fill/drain cycle. Its supposed to drain and then less than 2 hours later you fill it again and start to time how long it takes to drain. Well… I filled it on a Friday and then 1 WEEK later, it had only drained about 4″ of water!
-H





































