From guest contributer Sarah Leingang:

In the hills of the Renton Highlands there is a charming little blueberry farm. This farm is located on about 3.5 acres of land, which is roughly equal to 3.5 football fields. This is quite a bit of land for a suburban neighborhood like the Highlands. Especially when considering how quickly these areas are being densely developed into much smaller lots covered for the most part with single family homes.

This farm has been Tucked away in between I-405 and Edmonds Ave, and has been enjoyed by countless families. But most visitors coming and going never realize the true value of the place they have visited.

So what’s the point of this random rambling? Well in recent years this bit of land has undergone a lot of discussion between those that want to develop and those that want to conserve. With the common residential zoning of R-4, you can build 4 homes per acres, which means that if there were no wetland issues there would be a potential for 14 homes to be built over this beautiful farm. Already the farm owner has expressed concerns about the effect neighboring developments has had on the microclimate of her farm. These effects include such items as the loss of trees as a wind buffer, and water run off from nearby land that used to water her farm but is now diverted uselessly into the city’s storm water system.

This little blueberry farm tucked into the highlands is a rare find. It has a value even greater than just a bit of green space in a ever more developed suburban neighborhood. What people most often miss when looking at this farm is that this bit of land is a truly unique and rare ecosystem known as a fen. A fen is an ecosystem similar to a bog; but what makes a fen different from a bog is that it is feed by a natural water source, not simply by rainwater. An official definition describes “The fen is a phase in the development of the natural succession from open lake, through reedbed, fen and carr, to woodland as the peat develops and its surface rises.”

A naturally occurring fen is a rare treasure to come across, and without protection this fen could soon be only a memory. If this farm were to be developed intensely, the loss of this complex and remarkable natural wonder would be truly unfathomable. And even if it is not developed, the rate of development nearby may alter the fen’s microclimate so much that is damaged and loss anyhow.

City stormwater retention laws would require that some land be set aside, to serve as a retaining pond to mimic the natural function of a wetlands ability to slowly recharge ground water sources and filter clean water back into the ground. But the small effort of a retaining pond could never truly recover the ability of a natural wetland, 1 acre of wetland 1 foot deep can hold up to 330,000 gallons of water. The complex nature of any ecosystem cannot be remade (even with the best of intentions) since there is so many layers of perfectly balanced life. From the obvious flora and fauna down to the bugs and algae and even down to the unseen but just as important bacteria within the hydrological soil all work in perfect harmony that we are simply unable to recreate just anywhere.

Any bit of green space within our ever developing Highlands is a rarity, and should be considered for conservation for us and future generations. And this small blueberry farm tucked in amongst many homes is easy to overlook, but it is not just a blueberry farm… it is a FEN that is worth saving.

Sarah Leingang grew up in Renton Highlands and graduated from Hazen in 2003. She has recently obtained her degree in Architecture.

The excavation site across the street from the blueberry farm continues to fill with groundwater. It appears that the water table must be just a few inches below the level of the soil. (I think the pond shwon below is approximately two feet deep.)

The owner of the Kennydale Blueberry farm has applied for a rezone from RC to medium density R8, to allow additional homes to be built on the 3.5 acre site.

Council is considering allowing the property to instead be zoned to low density R4, which would allow one or two new homes, and would require that a biologist survey the wetland and put it into a protected status at the time of development.

While R4 would require wetland protection, we’ve been told that RC zoning would not require wetland protection, and that dog kennel runs or horse paddocks could be built on the low lying areas.

Personally, I would like to see the 2.25 acre damp area remain a blueberry farm, regardless of whether an additional home is built on the uplands. We have many homes in Renton Highlands, but only one U-Pick Blueberry farm.

Time for another Blueberry Bog Blog

We had a lengthy and interesting discussion at Monday night’s council meeting concerning the Kennydale Blueberry Farm rezone. The owner of the decades-old 3.5 acre farm is ready for retirement, and desires to rezone the property to an R4 or R8 (four to eight units per acre), from its current RC (resource conservation). She also says that the Blueberry plants are dying as a result of the dramatic development all around her farm, and the de-watering of the farm’s natural basin thanks to the city’s new storm-water drainage system.

The city staff, the Planning Commission, and the council’s Planning and Development subcommittee have all recommended R4 zoning for the property, which allows up to four homes per acre on the dry, buildable portion of the property (estimated to be 1.25 acres). Much of the past citizen testimony, however, has been in favor of keeping the zoning at RC, which would not allow subdivision but would allow the existing home, one accessory home, and (as we learned on Monday) several other rural type uses including professional dog kennels, professional stables, and other rural businesses.

But it turns out that the RC zoning would not ever require that the owner delineate the most delicate feature of the property, the peat bog (fen) fed by underground springs, which appears to be thousands of years old and forms the headwaters for Kennydale Creek. In a worst case type scenario, it sounds like RC zoning would allow for a future owner to bulldoze the blueberry plants, and put kennel runs on this peat bog if they were so inclined.

R4 zoning would require wetland delineation, but not until the property owner applied for subdivision. At that time, the wetland peat bog (estimated at 2.25 acres) would be delineated and documented by biologists in a wetland report, marked as a nature zone, and protected against building or any active uses. The remaining dry upland property would accommodate one to three new homes, in addition to the existing home.

Several citizens expressed concern that if the wetland delineation is not done before rezoning, then the character of the property may be altered before the biologists have a chance to survey the wetland. So the council asked the Mayor and the administration to contact the property owners, and see if the city could obtain permission to perform the wetland delineation now, in order to know specifically what the impact of the rezone will be. The report could then be provided to the property owner, and she in turn could share it with potential buyers, to eliminate all unknowns about the wetland when the property changes hands. In addition, council asked the administration to explore whether the owner would be interested in selling the wetland section back to the city, to protect it in perpetuity. ( This is a very common action along creeks and other bodies of water.)

The council has agreed to take up this issue again at Committee of the Whole, in two weeks.