HomeMy WebLinkAboutERC PresentationVIA 405 Apartments
Proposed redevelopment of Roxy Theater property located between I-405 and the Renton Village Shopping Center/Evergreen Building.
Eight (8) story multifamily building with 270 dwelling units.
Structured parking and ground floor amenity/commercial space.
Five (5) story wood construction over three (3) story of concrete.
1
Land Use
Commercial Office (CO) zoning classification.
Commercial Mixed Use (CMU) Comprehensive Plan designation.
Attached dwelling units permitted via PUD and special conditions.
2
Critical Areas
High Seismic Hazard – Potential for Liquefaction
Special Flood Hazard Zone AH
Rolling Hills Creek Type Np (non-fish bearing) waters per COR maps
3
Vegetation
62 total significant trees.
32 trees in functional stream buffer.
30 trees outside buffer and subject to 10% retention.
Two (2) trees to be retained.
12 caliper inches of replacement required.
4
Existing Access
No public frontage.
Vehicle access to S Grady Way & S Renton Village Pl via easements.
No pedestrian access to public streets.
5
Proposed Access
Buffered pedestrian corridor to S Grady
Sidewalk extension to S Renton Village Pl
Delineated pathway to Uwajimaya
6
Proposed Access Cont’d.
Enhanced drive aisle
Mimic downtown street section
Narrow vehicle lanes
Parking adjacent to 12’+ sidewalk
Street trees in grates
7
Transportation Impacts
Credit provided for existing theater.
Weekday AM peak would generate an increase of 64 new trips (5 inbound and 59 outbound).
Weekday PM peak would generate a decrease of 102 new trips (43 inbound and 59 outbound).
Concurrency test has been passed.
Transportation impact fee provides appropriate mitigation.
No public street improvements.
8
Elevations
Two story brick base
Hardi and metal panel cladding on upper floors
Large step backs on north and south façade
Cantilevered overhangs
Modulated roof-line with amenity space setback
9
Geotechnical Considerations
Potential for liquefaction with 2.5 to 3.5 inch settlement.
No lateral movement anticipated.
Auger-cast pile supported foundation
Shallow foundation with GeoPiers.
Two recommended SEPA mitigation measures.
site
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Rolling Hills Creek
COR maps indicates Np (non-fish) and applicant agrees.
Muckleshoot Tribe insists stream is Type F (fish-bearing).
Legally constructed substantial improvements north of curb-line results in no functional buffer.
Applicant proposes to remove some surface parking and enhance new and remaining buffer.
SEPA mitigation to include southern bank enhancement and 5-years maintenance and monitoring.
11
Stormwater
Black River Drainage Basin and Peak Flow Control Standard – Matching Existing.
Existing run-off sheet flows into onsite catch basins and discharged into Rolling Hills Creek.
Drainage patterns to be maintained following redevelopment.
Enhanced Basic Water Quality is required and proposed to be provided via a biofilltration vault.
Project would be exempt from flow control requirements.
No more than 0.15 cubic feet per second increase in 100-year peak flows.
Increased runoff will not significantly impact a critical area.
On-site BMPs proposed include quality top soil to all pervious surfaces and vegetated roof. Other BMPs deemed infeasible due to poor soils, high groundwater, and lack of available vegetated
flow path.
12
Flood Hazard
Zone AH with flood depth of 1 to 3 feet
Base flood elevation of 27.6 feet
Floodplain storage volume increased from 32,108cf to 34,688cf.
Finished floor elevation one-foot above BFE.
Finding of no effect on federal status species.
13
Environmental Health
Close proximity to I-405
SEPA mitigation to reduce impacts of freeway vehicle noise inside the units.
14
DNS-M Recommendation
Compliance with the recommendations of the geotechnical report or a future addendum to the report.
Applicant’s geotechnical engineer shall review the project’s construction and building permit plans to verify compliance with the geotechnical report(s) and submit a sealed letter stating
the plans meet the intent of the report(s).
Final stream buffer enhancement plan to include the existing northern bank areas, newly provided buffer, and along the southern bank of the stream on the subject property between the
OHWM and I-405.
Preparation of an acoustical study to determine whether additional sound attenuation or acoustical architectural measures are necessary to mitigate the impacts of the freeway noise generated
by the abutting I-405.
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