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      <li><input type="radio" id="poll-answer-94" name="poll_25" value="94"> <label for="poll-answer-94">Illicit discharge detection and elimination strategies</label></li>
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      <li><input type="radio" id="poll-answer-96" name="poll_25" value="96"> <label for="poll-answer-96">Monitoring the performance of existing or prospective infrastructure</label></li>
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      <li><input type="radio" id="poll-answer-102" name="poll_25" value="102"> <label for="poll-answer-102">Water quality trading programs</label></li>
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LONG BEACH STORMWATER PROJECT PROMISES PROTECTION FOR LA RIVER

Apr 28, 2022 | Flooding & Watersheds | 0



Construction is well underway on a project in Long Beach, California, to
transform a highly impervious industrial corridor into a stormwater treatment
hub, capable of collecting and diverting more than 40% of urban runoff generated
throughout the Lower Los Angeles River Watershed. The Long Beach Municipal Urban
Stormwater Treatment Project (LB-MUST), expected to become operational in 2024,
aims to drastically reduce the flow of untreated stormwater runoff into the Los
Angeles River, San Pedro Bay, and Pacific Ocean.  

The Long Beach Department of Public Works (DPW) estimates that LB-MUST, which
will consist of an advanced stormwater treatment facility as well as an adjacent
constructed wetland, will be able to capture and treat nearly 2,000 acre-feet
per year of urban runoff when fully built. More than 800 acre-feet per year of
this runoff will be suitable for non-potable reuse applications throughout the
region.

In April, the LB-MUST project earned an Envision Platinum certification from the
Institute of Sustainable Infrastructure (ISI; Washington, D.C.). LB-MUST is the
fourth stormwater project in the Los Angeles region and the first in Long Beach
to receive the designation. The certification recognizes infrastructure designs
that prioritize sustainability and environmental equity.

“Achieving Envision Platinum affirms the City of Long Beach’s commitment to
sustainability and sets an example for other public and private developments,”
said ISI Managing Director Melissa Peneycad, in a release. “This multi-benefit
project is a prime example of an infrastructure project that incorporates
nature-based solutions to minimize environmental impact while meeting the
long-term needs of the communities it serves.”  


TARGETING RUNOFF AND RECREATION

Strategically located at the mouth of the Los Angeles River, the new LB-MUST
treatment facility will divert stormwater from existing pump stations throughout
the watershed. Once diverted, runoff will undergo a combination of ceramic
ultrafiltration, media filtration, and photocatalytic treatment, purging both
organic and inorganic contaminants as small as 0.01 micrometers in diameter.
Initial plans for the facility will enable it to accept about 9.1 mL/d (2 mgd)
of runoff, with the potential to double its capacity with future upgrades.

The Long Beach Municipal Urban Stormwater Treatment Project (LB-MUST), expected
to become operational in 2023, aims to drastically reduce the flow of untreated
stormwater runoff into the Los Angeles River, San Pedro Bay, and Pacific Ocean.
Image courtesy of Stantec/City of Long Beach

According to project documents, the facility primarily aims to capture dry
weather runoff — the most prevalent source of water pollution in the region,
originating from such activities as watering lawns and washing cars as well as
groundwater seepage and illicit discharges. However, the design also targets the
“first-flush” portion of runoff generated during storms. Critically, LB-MUST
will feature considerable public outreach elements, described Ed Othmer, who
managed the design of the treatment facility on behalf of Stantec (San Diego,
California). The facility will invite the public for guided tours and will
feature educational signage throughout the premises.

“At the outset, I envisioned this project as more than just a stormwater
treatment facility,” Othmer said in a release. “I wanted LB-MUST to be the
flagship regional project along the LA River that fostered broader community
collaboration to inform greater sustainability decisions. I’m thankful to the
City of Long Beach for allowing me to manage this amazing project.”

The 0.4-ha (1-acre) constructed wetland, to be partially irrigated with treated
runoff, will further the city’s goals to improve access to green space for
locals while also passively managing stormwater. Under long-term plans for the
project site, the wetland will connect to adjacent outdoor amenities like soccer
fields and the Los Angeles River Bike Path. Designed in cooperation with the
Aquarium of the Pacific (Long Beach) and the San Gabriel and Lower Los Angeles
Rivers and Mountains Conservancy (Azusa, California), the wetland will feature
native, drought-resistant vegetation and add new walking paths and rest areas to
the site.

Long Beach’s Willmore neighborhood, the site of the LB-MUST project, ranks
within the 90th percentile for pollution burden throughout all Los Angeles
County neighborhoods, according to a 2016 report on access to green spaces
compiled by the county government. This means that its residents face
significant exposure to pollutants and the adverse environmental effects caused
by pollution, in large part due to its downstream location and scarcity of
existing green spaces, the report describes.


FINANCING BEYOND THE FENCE

The range of funding sources for LB-MUST reflect common buy-in for new
sustainability measures by voters, government entities, and local nonprofit
groups. Project planners have budgeted $44 million for the first phase of the
LB-MUST project, which supports the initial construction of the treatment
facility and wetland.

Long Beach’s Willmore neighborhood, the site of the LB-MUST project, ranks
within the 90th percentile for pollution burden throughout all Los Angeles
County neighborhoods. Not only does the project aim to improve access to parks
for this neighborhood, described Stantec project design lead Ed Othmer, but also
engage neighborhood residents with paid opportunities to assist in construction.
Image courtesy of Stantec/City of Long Beach

The California Department of Transportation invested $28 million into LB-MUST in
exchange for credits that count toward fulfilling requirements of the state
agency’s National Pollutant Discharge Elimination System (NPDES) permits. The
Port of Long Beach, the second-busiest container seaport in the U.S. and a
neighbor to the LB-MUST project, also contributed $1 million.

Approximately $14 million came from local tax programs, including $1 million
from Measure A, a sales tax to support infrastructure approved by Long Beach
voters in 2016, and $10.8 million from Measure W, a 2018 parcel tax passed by
voters in Los Angeles County specifically tailored to funding water
infrastructure. The California Coastal Conservancy contributed $500,000. Thanks
to innovative funding strategies that engaged multiple partners throughout the
region, the first phase of LB-MUST required only a $428,000 investment from the
Long Beach municipal government.

“The regional cooperation deployed and implemented to achieve the project’s
goals is outstanding and serves as inspiration for other regions,” Peneycad
said.

Learn more about the Long Beach Municipal Urban Stormwater Treatment Project at
the Long Beach DPW website.

Top image courtesy of Stantec/City of Long Beach

--------------------------------------------------------------------------------



ABOUT THE AUTHOR
Justin Jacques is editor of Stormwater Report and a staff member of the Water
Environment Federation (WEF). In addition to writing for WEF’s online
publications, he also contributes to Water Environment & Technology magazine.
Contact him at jjacques@wef.org.

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Which of the following does your organization have the least amount of
information about?

 * Promoting stormwater management within the community
 * Illicit discharge detection and elimination strategies
 * Controlling runoff from construction sites/during re-development projects
 * Monitoring the performance of existing or prospective infrastructure
 * Locating reliable funding and financing mechanisms
 * Integrated water supply planning/stormwater capture
 * Water quality trading programs
 * Other



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