OVERVIEW OF PROPOSAL FOR

NATURAL RESOURCE PROTECTIONS & STORMWATER

MANAGEMENT IN RIVER TERRACE

TUALATIN RIVER WATERSHED COUNCIL BRIEFING

JANUARY 9, 2013

Wetlands & Riparian AreasMandatory Protection:

• Application of existing city policy

• Regulated by Sensitive Lands chapter and CWS Design & Construction Standards

• DSL approved local wetland inventory Oct 2012

* Development prohibited in significant wetland areas (1 identified)

* Development required to avoid, minimize, mitigate impacts in other areas

Habitat Conservation AreasVoluntary Protection:

• Application of existing city policy developed during Tualatin Basin Partnership Process

• Regulated by Sensitive Lands chapter

Incentives include:• 50% adjustment to any dimensional standard• Reduction to minimum density

Significant Tree GrovesVoluntary Protection:

• Application of recently adopted city policy

• Regulated by Urban Forestry Plan

Incentives include:• Density transfer• Reduction to minimum density• Variations to some development standards

Stormwater Proposal

HISTORY - began as West Bull Mtn. Stormwater Plan and retains guiding principals established by the Stakeholder Group • Equitable/Feasible Financing• Green Community

STORMWATER STRATEGIES - brought forward to River Terrace Plan• Restore/Enhance Vegetated Corridors• Protect Water Quality• Preserve Existing Hydrology• Promote Safe and Long Lasting Stormwater Facilities• Balance the use of Regional and On-Site Management• Preserve Existing Mature Vegetation• Maximize use of Multi-benefit facilities to create community amenities• Promote Partnership with Other Public Service Providers

The cost of past stormwater impacts on Bull Mountain

City of Tigard capital project costs to stabilize Bull Mountain Streams in 2014 is $2,150,000. Very little funding is available for staff to recommend future projects to council after 2014.

Questions?