Nothing can be placed outside of carts other than yardwaste bags and bundles, and lids on the carts must be able to fully close.
The Oma-Gro facility, 15705 Harlan Lewis Road in Bellevue, also accepts yard waste.
If you want yardwaste picked up that does not fit in your waste cart you will need a yardwaste sticker for each brown bag. Please read the rules on the sticker for proper placement.