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Project Sponsor
City of Kellogg
Purpose
This project improves stormwater management at the City of Kellogg’s stormwater outfalls and consists of three phases.
In Phase 1, the city improved stormwater management at three outfalls (the points of discharge into a stream, river, or other water body. These outfalls are located at Hill Street, Bunker Creek, and North Kellogg. By reducing the amount of stormwater that flows out of these outfalls, the city aims to reduce the volume of metals, phosphorus, and other pollutants that eventually enter Coeur d’Alene Lake via the Coeur d’Alene River. The outfall upgrade at Bunker Creek also adds greenspace to the Trail of the Coeur d’Alenes.
In Phase 2, the city addressed stormwater at Government Gulch by restoring and improving swales and ponds for better stormwater retention. A broken concrete ditch was removed, and the surrounding area was regraded to increase infiltration. The city also constructed a bioswale in East Kellogg to increase infiltration and nutrient uptake. This area includes a designated spot for snow storage to drain into the bioswale, as well as a gravel path that connects to the Trail of the Coeur d’Alenes. Finally, a Vactor truck was purchased to more efficiently and effectively clean out stormwater systems and maintain their function.
In Phase 3, the city conducted a comprehensive assessment and documented areas for stormwater upgrades. Using this assessment, the city selected four sites to mitigate stormwater runoff. This phase also includes the installation of three continuous deflective separation (CDS) structures.
Even with these management measures in place, residents and visitors must be mindful about daily habits such as fertilizer use and waste disposal. Less pollution to capture and filter means less maintenance time and cost. Filtration systems can be overwhelmed, increasing the possibility that phosphorus and other pollutants in stormwater can reach Coeur d’Alene Lake.
Funding
This project received the following from Governor Little’s Leading Idaho initiative:
- Phase 1: $570,000
- Phase 2: $1.1 million
- Phase 3: $670,000
Current Status
Phase 1—Three project areas are complete: Bunker Creek Bioswale, South Hill Street CDS structure, and North Hill Street inlet modification and filters.
Phase 2—Two project areas are complete: Government Gulch Channel Restoration and East Kellogg Bioswale. The Vactor Truck was purchased and is in use by city staff to perform much-needed stormwater maintenance activities.
Phase 3—Outstanding Areas of Kellogg
- Task 1—The System Investigations and Survey is complete. This included cleaning, video recording, and mapping of the investigation area’s stormwater system and the inlets and surrounding areas.
- Task 2—Engineering Designs are complete. Project selection partially complete; dependent on landowner approval.
- Task 3—Construction and Final Reporting is partially complete.
- Two stormwater infiltration sites are complete. The Oak and Chestnut inlets were finished in fall 2025.
- Two stormwater inlets will go out to bid in spring 2026. Construction will finish in summer 2026.
- Three CDS structures will go out to bid in Spring 2026. These will be installed near the highway.
Outcome
This project is estimated to reduce phosphorus inputs to the Coeur d’Alene River by over 700 pounds annually.