Welcome The purpose of this information is to give you an opportunity to:

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1 Welcome The purpose of this information is to give you an opportunity to: Learn how the Ada County Highway District (ACHD) is meeting requirements and milestones in our Phase II Stormwater Management Plan, which targets Eagle, Meridian, and unincorporated urbanized southwest Boise. Provide your input on the Phase II Stormwater Management Plan. Note: ACHD applied for reissuance of the NPDES MS4 permit in December of The current permit expired October 14th, 2014 but has been administratively extended until the new permit is issued.

2 Permit Areas Phase I Permit Area (Boise and Garden City) Phase II Permit Area (Eagle, Meridian, and unincorporated southwest Boise)

3 What is Stormwater? Stormwater is rain and snow melt that flows into the storm drain system. Stormwater flows across hard surfaces sidewalks, driveways, roadways, or rooftops and can pick up pollutants like lawn chemicals, automobile oil and grease, airborne dust, sediment and pet waste. Stormwater is not treated at a sewage treatment plant! It is discharged from the storm drain system directly into local waterways and groundwater. What is a Storm Drain System? A storm drain system conveys stormwater to local creeks, drains, canals, the Boise River and our groundwater. ACHD s storm drain system consists of: streets gutters ditches swales manholes stormwater basins seepage beds tree cells channels inlets pipes bioretention planters

4 What is the Stormwater Management Plan? The plan outlines procedures and practices ACHD uses or will use to reduce pollutants that discharge into the Boise River and other local waterways from the storm drain system. ACHD must employ practices that meet six measures: Education and outreach Public involvement and participation Illicit discharge detection and elimination Construction site stormwater runoff Post-construction stormwater management for new development and redevelopment projects Pollution prevention and good housekeeping Street Sweeper Art Contest Olivia, Grade 12

5 MEASURE 1 Public Education & Outreach ACHD s Education and Outreach Plan provides the basis on which ACHD will build an integrative and cooperative education and outreach program. Plan activities implemented include: Working with Partners for Clean Water, a valley wide group that provides education, outreach and advertising (bus ads, billboards, website) targeted at reducing pollution from stormwater runoff. Distributing stormwater press releases to the local media. Developing and distributing stormwater related fact sheets, flyers and brochures. Presenting to professional and student groups. Installing No Dumping markers on storm drain inlets that discharge to service waterbodies.

6 MEASURE 2 Public Involvement & Participation An informed and knowledgeable community helps ensure greater support and compliance. ACHD s stormwater annual reports and Stormwater Management Plan (SWMP) are posted on our website. ACHD hosts online open houses to solicit comments on the Stormwater program. Approximately 3,815 storm drains have been marked with No Dumping curb markers by volunteer and community groups, with 333 marked in. An additional 500 informational flyers were distributed to residents. ACHD hosted the What Goes Down the Drain Goes to the River Street Sweeper Art Contest in Winning designs were installed on our vacuum sweeper fleet. Street Sweeper Art Contest Cate, Grade 10

7 MEASURE 3 Illicit Discharge Detection & Elimination Illicit discharges result in untreated stormwater that contribute high levels of pollutants to degrade water quality and threaten aquatic life, wildlife, and human health. In ACHD completed the following to detect and eliminate illicit discharges in Ada County: Investigated 8 illicit discharge complaints in the Phase II area Responded to 19 illicit discharge incidents referred from the Stormwater Pollution Hotline ( ) Developed a comprehensive storm drain map consisting of 485 outfalls along 37 separate waterways in the Phase II area Inspected 49 outfalls during dry weather conditions to screen for illicit discharges Maintained an inventory of high risk industrial facilities What is an Illicit Discharge? Spills, leaks or intentional dumping of materials into the storm drain system including: paint sewage automotive fluids wash water trash food grease

8 MEASURE 4 Control of Construction Stormwater Runoff ACHD implements a Construction Site Discharge Control Program to reduce pollutants associated with construction site runoff. This program requires those who work in ACHD s rightof-way to implement Best Management Practices (BMPs). Best Management Practices (BMPs) BMP s are controls or practices that reduce or prevent pollutants such as sediment, pesticides, fuels and metals from entering nearby surface water, groundwater or storm drain system. Some common controls are silt fences, concrete washouts and catch basin mats. To ensure appropriate measures were taken to limit runoff countywide, in ACHD: Reviewed 392 Erosion and Sediment Control Plans Conducted 8,350 inspections Issued two notices of violation Silt fences Catch basin mats Concrete washouts

9 MEASURE 5 Post-construction Stormwater Management for New Development & Redevelopment Projects ACHD develops and implements programs to manage post-construction stormwater: ACHD inspects stormwater treatment systems before final approval of constructed projects. Operation and maintenance manuals for stormwater treatment facilities are required for all projects reviewed and approved by ACHD s Development Services Department. ACHD is exploring the use of Green Stormwater Infrastructure (GSI) where feasible in roadway repair and retrofit projects. ACHD developed a Green Stormwater Infrastructure Guidance Manual. ACHD developed a Revegetation Guidance Manual for stormwater basins. The Franklin Road, Black Cat Road to Ten Mile Road roadside swales were completed in November ACHD staff continues with vegetation establishment and weed control.

10 MEASURE 6 Pollution Prevention/Good Housekeeping Countywide, ACHD owns and operates a storm drain system composed of 578 miles of storm drain pipe, 6,756 sand and grease traps, 23,112 catch basins, and 108 ACHD-owned detention and retention basins. During ACHD crews across Ada County: Utilized 22 sweepers to sweep 30,185 miles of roadway. Cleaned 5,098 catch basins and 9.6 miles of storm drain pipe. Removed 51,094 cubic yards of material - the equivalent of filling 15.5 Olympic size swimming pools.

11 Pollutants of Concern The Idaho Department of Environmental Quality (IDEQ) has identified these pollutants as sources of impairment for the lower Boise River and its tributaries. Phosphorus Promotes weed and algae growth Comes from fertilizer runoff, human/animal waste, detergents Prevention Increase public awareness regarding adverse impacts of fertilizer Encourage disconnection of septic systems and connection to sanitary sewer system Consider Green Stormwater Infrastructure (GSI) for roadway development projects Sediment Blocks sunlight needed by aquatic plants to grow Can carry toxic chemicals Caused by soil erosion from construction sites, lawns and gardening/landscaping activities Prevention Street sweeping Cleaning catch basins Construction site controls Green Stormwater Infrastructure (GSI) Bacteria Can cause disease when present in drinking water and recreational waterways Originates from sewer and septic tanks/organic matter leakage, and animal waste Prevention Encourage collection of pet waste Waterfowl management Green Stormwater Infrastructure (GSI)

12 Stormwater Monitoring ACHD collects stormwater samples on a regular basis to: Estimate the amount of pollutants being discharged from the storm drain system. Identify where additional controls are needed. ACHD has been updating monitoring activities to collect samples through the duration of monitored storms. Discharge pipe Flow meter enclosure

13 What s Next? Review and address comments from online open house Modify the Phase II Stormwater Management Plan as needed Continue implementing the Phase II Plan Assess outcomes Please provide your comments on the Phase II Stormwater Management Plan. While your comments are always welcome, they can be best utilized if received before December 7,.