The Los Angeles Bureau of Sanitation (LASAN), in partnership with the Los Angeles Department of Water and Power, strives to capture and infiltrate stormwater to increase groundwater replenishment throughout the San Fernando Valley Basin and improve downstream receiving water quality of the Los Angeles River.
The objective of the Van Nuys Green Streets Project is to implement green street infrastructure, consisting of drywells coupled with bioretention planters and porous gutters in public right-of-way, to capture and infiltrate stormwater from a Pacoima neighborhood of approximately 100 acres draining onto Van Nuys Blvd. The proposed green street infrastructure will be installed to complement the city's Great Streets Initiative, which aims to increase economic activity, improve access and mobility, enhance neighborhood character, promote community engagement, improve environmental resilience, provide safer and more secure communities, and improve public health throughout the city.
Geosyntec's Scope of Services
Geosyntec's scope of work includes managing a team of Geosyntec staff and over ten subconsultants to provide comprehensive alternative project delivery (design-build) services including project management, public outreach, concept development, preliminary and final design, permitting and approvals, construction (at risk) and construction management, and maintenance and monitoring for one-year after construction. Four design alternatives were evaluated with the city and the public. Preliminary design activities included full-scale drywell installation and percolation testing, utility investigation and coordination, and drainage analysis and optimization. Because Geosyntec is performing the project at risk, extensive project controls were implemented including Project Management Plan, Risk Register, and detailed budget and schedule updates. The project has completed outreach, design, and permitting activities, attained construction substantial completion, and is currently performing maintenance and monitoring.
Geosyntec completed outreach, design, permitting, and construction in just 16 months, 2 months ahead of baseline schedule. Adapting the scope of work away from the commercial street to the residential neighborhood resulted in avoiding significant utility conflicts and extensive traffic control. Full-scale drywell installation and testing was very unique and innovative compared to traditional investigation approach, and it resulted in significant schedule and cost savings for the project. In addition, continuous simulation modeling used for drainage analysis in lieu of traditional design storm approach resulted in optimized drainage design and project value. So far, Geosyntec's team is demonstrating that Alternative Project Delivery (design-build) can be a successful delivery method for the city.
- Location: Los Angeles, California
- Client: City of Los Angeles, Bureau of Sanitation (LASAN)
- Project Practice Areas: Water & Wastewater, Environmental Management, Water and Natural Resources
- Type of Facility: Green infrastructure
- Services Provided: Public Outreach, Preliminary Design & Construction Documents, Utility Coordination & Regulatory Approvals, Construction Management, Alternative Project Delivery, Monitoring
- Type of Work: Integrated delivery
- Governing Regulation: State and local