Improving our region 's local parks and natural areas When planning a transportation project, we try to limit any adverse effects it may have on the environment. Better still, we try to avoid them all together. When that isn’t possible, we look for ways to mitigate those effects. How? We coordinate with resource agencies to improve parks, wetlands, and other sensitive natural areas. Here are the SR 520 Program environmental mitigation projects that are already completed or are underway. 6. South Lake 3EvanEsv Canrese kCreek Improved about 4 5 BBeearar Cree Creekk 4 acres of lake Natural Area UniversityUn ioofn Bay WashingtonNatural Area Kirkland shore by planting Redmond Montlake Redmond Triangle projeUniversityct of native vegetation, 1 Washington WSDOT-Owned 9 removing decades- PortageBryant B Bayuildi nParkg Peninsula Easastt ApApproproaachch old industrial structures, and Montlake 520 Washington Park enhancing near-shore habitat. WashAirnbgortoetnu mPark Medina Arboretum Completed in 2015. 992 8 YarYarowrro Cwree Crekek 5 Montlake BellevueBellevue

Seattle 405 7. Cedar River Lake Elliott Bridge Reach Washington Restoring about 5 acres of 90 wetlands, side channels, floodplain and river habitat for

Mercer migrating fish, including Island Chinook salmon. Completion

Seward Park expected in 2016.

8. Yarrow Creek Restored wetlands LEGEND: SR 520SR 520 corridor corridor and rehabilitated the WetlandWetland and/or and aquatic aquatic mitigationmitigation stream to improve ParksParks mitigation mitigation Taylor Creek 6 Culvert/streamConstruction mitigation mitigation South fish and wildlife habitat, and built

Grass Creek mitigationGrass siteCreek 101 eight large, fish-friendly culverts 101 South Lake Washington Shoreline Restoration within SR 520’s Eastside corridor. 10 Renton 109109 HoquiamHoquiam Completed in 2014. AberdeenAberdeen CCeeddaar RiveRiverr 101101 1212 169 Renton 7 EllioElliotttt BBririddge ReaReacchh Grays Harbor Grays Harbor CosmopolisCosmopolis Pontoon Construction Pontoon Construction 105105 ProjectProject location location 9. SR 520 East Approach Improving about 1 acre of 1. New Portage Bay Park 4. sockeye-spawning habitat beneath the east end of the new Supporting the city of Seattle’s Improving existing floating bridge by adding lake-bed creation of a new, approximately wetlands and gravel, removing bulkhead and 4-acre public park on the north buffers, and rubble, and restoring/replanting shore of Portage Bay, with water creating new the shoreline. Completion access for boaters and open wetlands – about expected in 2016. space for other uses. Completion 22 acres total – within the expected in 2018. ’s Union Bay Natural Area, northeast of 10. grass creek Husky Stadium. Completion Restored wetlands 2. Washington Park expected in 2017. Arboretum and shoreline habitat in the Performing a variety 5. Bear Creek 68-acre Grass of improvements Creek site in Grays Improved about 16 in the Arboretum, Harbor County by removing a acres of important including creation portion of earthen dike and stream and riparian of a new multiuse re-establishing tidal channels habitat for salmon trail, and restoration work in to reconnect and restore tidal by stabilizing creek Arboretum Creek, Azalea Way influence in the area. (SR 520 bank, adding stream gravel and Pond and Foster Island. Projects pontoons were constructed in wood, and planting native are underway. Aberdeen, Grays Harbor vegetation. Completed in 2015. County.) Completed in 2011. 3. Evans Creek Improved about 32 acres of wetlands at the confluence of Bear Creek and Evans Creek, near Redmond. Completed in 2013.