Public Works

Projects Underway
Under construction or in design

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North Segment: Time Check & Cedar Lake Area

Northwest Neighborhood Detention Basins // 2019 – 2025 Sinclair Detention Basin
  • Hold excess rain water until it can be safely pumped back into the Cedar River
  • Serve as a “bowl” during heavy rain events, reducing stormwater runoff and neighborhood flash flooding. Locations and schedule include:
  • 2019 – north of the Northwest Recreation Center
  • 2022 – south of E Avenue NW and west of 28th Street
  • 2024 – north of O Avenue NW and west of Edgewood Road
  • 2025 – south of O Avenue NW and east of Highwood Drive
6th Street NW Extension to Ellis Blvd NW // 2022map of 6th street
  • Extends 6th Street NW through former Mid-American site, to Ellis Blvd NW, opening connectivity into Time Check neighborhood
  • New connection for traffic, pedestrians, bikes, transit
  • Includes sidewalk, bike lanes, brick pavers, raised medians, and utility improvements
  • Integrated with permanent flood control plans in Time Check
  • $8 million investment
Shaver Road NE Bridge Elevation // 2020 - 2023
  • Extension and partial demolition of existing box culvert, utility relocations (2020 – 2021)
  • Shaver Road bridge replacement/elevation and trail underpass (2021 – 2022)
  • Environmental improvements to streambed (2021 – 2023) 
Cedar Valley Nature Trail Improvements // 2020 - 2023Resident bike-riding along lake
  • Trail currently closed from 10th Street NE, along McLoud Run, and south to the Cedar Lake Loop located at the northwest corner of Cedar Lake
  • Detour established along 10th Street NE
  • Flood control in this area will include a new levee and trail system west of Shaver Road and south of McLoud Run, with the trail built on top of the levee (similar to the Sinclair levee).
  • The levee and trail system will include amenities such as a trail parking lot, pedestrian benches, and scenic viewpoints.
  • When all flood control measures are completed in this area, it will wrap around Cedar Lake, tying into high ground at I-380 near J Avenue, and will protect homes and businesses threatened when the Cedar River backs up into McLoud Run and Cedar Lake
O Avenue NW Levee Gateway // TBD
  • Design concepts are underway to elevate O Avenue NW over a levee, serving as a gateway to the greenways.
  • The project will feature an ADA accessible ramp from the raised O Avenue to the Northwest Gateway & Memorial Plaza.
E & F Avenue NW reconfiguration // 2022 Phase 1
  • Will eliminate the complex geometry at the intersection where 1st Street NW, E Avenue NW, F Avenue NW, and the I-380 off-ramp all come together
  • The realignment will be a simplified, more intuitive design, and will accommodate permanent flood control measures such as a levee and pump station


Central Segment: Downtown & Kingston Village

Quaker Oats Flood Wall // 2018 - 2021Rendering of Quaker Oats flood wall
  • Protects one of the nation's leading agricultural producers
  • 2,100 linear feet of permanent flood wall
  • Will ultimately protect to the 2008 flood volume
  • Includes pump station upgrades, water transmission main relocation, and railroad closure gate
E & F Avenue NE signal removals underneath I-380 // Summer 2021
  • Located on 1st Street NE underneath I-380
  • Signal removals are necessary precursor work to floodgate installation
  • Traffic study confirmed the intersections can operate efficiently as an all-way stop
  • Prior to their removals, the signals will operate in red-flash mode (four-way stop) as part of a transitional period to help the public get used to treating the intersection as a four-way stop
Demolition of HydroElectric Facility at the 5-in-1 Dam // Fall 2021 - 2022
  • This facility has been out of service since it was damaged in the 2008 Flood.
  • It will be removed and the dam gate behind it will be upgraded, which will allow for construction of a future floodwall between the dam and 1st Avenue East.
E and F Avenue NE Floodgates under 5-in-1 Dam // 2022 –2023 
  • Located underneath I-380
  • Roller gates similar to 16th Avenue SE
  • Signal removals at E and F Avenue: precursor work to gate installation (2021)
  • Hydroelectric facility will be demolished (Fall 2021/Winter 2022) prior to floodgate construction
  • Closures of E & F Avenue will be required during construction (timing and phasing TBD)
Tree of Five Seasons Park // 2022 –2023Five Seasons Park rendering with views of river
  • Sculpture elevated and realigned to accommodate levee
  • Pump station
  • Permanent full height floodwall with elevated park to allow views of the river
  • New bike trail connecting E Avenue with downtown
  • 1st Street will be reduced to one lane during construction
  • New landscaping and tree plantings (future project)
1st Avenue SE Floodgate // 2021 –20221st Ave floodgate and road
  • Roller gate similar to 16th Avenue SE
  • Preliminary work to begin June; traffic impacts will not occur until later this summer
  • 1st Avenue to remain open during construction, lane reductions in effect
  • Temporary parking removal on 1st Avenue during construction
  • VIEW PARKING IMPACTS
City Hall Flood Control //  2021 – 2024   City Hall flood control and trail
  • Trail connection established
  • Curb and ADA improvements on 1st Street SE
  • Temporary traffic signals in place during construction
2nd Avenue SE Floodgate // 2022 
  • Stackable / removable gate similar to 3rd Avenue SE floodgate
  • Includes a speed table at the trail crossing
  • 2nd Avenue will be closed during construction
3rd Avenue SE Floodgate // 2020 – September 20213RD AVE FLOOD GATE concept
  • Stackable / removable floodgate
  • Permanent columns on sidewalk
  • Stackable panel gate during flood
  • Deployed for a 22 ft river elevation
  • 3rd Avenue closed during construction
1st Street SE Storm Sewer (3rd Ave - 5th Ave SE) // Late 2021 – 2022 
  • Connects two future pump stations
  • Reduces number of river outlets
  • Eliminates need for pump station at 4th Ave
  • Pump connections add resiliency – if one pump fails, another is available
  • Partial and full closures expected
4th Avenue Riverfront // 2023-24
  • Between Smulekoff’s and Hach building on 4th Avenue SE
  • Considerations include parking, preserving view of the river, trail enhancements, public access, etc.
  • Permanent and combination floodwalls incorporated 
Amphitheatre Floodwall // 2020 – 2021 Amphitheatre floodwall
  • Floodwall built into the side of a new facility that also doubles as a public restroom and storage for events.
  • The built-in floodwall protects to the 2008 flood volume.
  • It will tie into a levee and removable floodwall that will stretch from the Amphitheatre to 7th Avenue SW, coming 2023
Kingston Village Storm Sewer Consolidation // 2022
  • Consolidating underground storm sewer lines reduces our number of vulnerable river outlets
  • Consolidate and relocate storm sewer on 1st Street SW at 8th Avenue SW
  • The new lines will be redirected to a future pump station at 8th Avenue
8th Avenue Bridge & Riverfront Improvements // 2023+8th Ave Bridge rendering
  • Elevated 15 feet, bridge to remain open during floods
  • Raised above 2008 volume
  • Fewer piers in river
  • Incorporates floodwall, pump station, and streetscaping/lighting
  • Incorporates indoor/outdoor public gathering spaces
  • Complements Amphitheatre
  • Trail component 

South Segment: NewBo & Czech Village

NewBo Lot 44 Levee // 2020 – 2021 
  • Located between 9th Avenue SE and 12th Avenue SE
  • Parking restrictions in place during and after construction
  • View a map of parking impacts 
12th Avenue SE Floodgate // Summer 2022 – Spring 2023
  • Roller gate, similar to 16th Avenue SE
  • Aesthetics to complement 16th Avenue SE gate
  • Paired with intersection improvements at 2nd Street for new roundabout
  • 12th Avenue Bridge elevation means west side does not require floodgate
  • Road will be closed to traffic
  • Trail detour established
  • Access maintained to African American Museum of Iowa
Masaryk Park Memorial  // Spring-Summer 2021 - Fall 2021Masaryk Park
  • Reinstating memorial markers that were moved during levee construction
  • Recall individuals significant to the history and development of the New Bohemia District
  • Includes replacing flag poles and adding bike racks and plantings 
16th Avenue SW Floodgate // Fall 2021 – Spring 2022 16th Ave SW floodgate
  • Roller gate paired with decorative archway
  • Complements aesthetics of east-side floodgate
  • Integrated with landscaping enhancements near Czech Village Clock Tower
  • Trail detour will be established
Czech Village Underground Gate // 2021
  • New underground stormwater gate
  • Prevents river water from backing up into the City’s storm sewer system, eliminating street flooding
  • Reduces the City’s reliance on temporary measures such as plugs and pumps 
National Czech & Slovak Museum & Library Floodwall // 2021Rendering of archway and floodwall
  • Permanent concrete floodwall from the 16th Avenue gate to the proposed pump station just south of the 12th Avenue Bridge
  • Includes a raised, terraced yard to accommodate outdoor activities at the museum and minimize the appearance of the floodwall
Otis Road Storm Sewer // Spring 2021 – Fall 2021
  • New storm sewer along Otis Road (16th Street - Van Vechten Park) and upgrading storm sewer underneath a future levee.
  • Ensures excess rain water can escape, instead of backing up into the neighborhood
  • Tree clearing at Van Vechten Park is required to prevent tree debris clogging stormwater pipes 
Czech Village Pump Station // 2022
  • Largest pump station undertaken to date, located south of the 12th Avenue Bridge
  • Capacity anticipated to be over 100,000 gallons per minute (more than twice the size of the Parking Lot 44 Pump Station)
  • The aesthetics will complement and blend with the National Czech & Slovak Museum & Library

Related: View Open House Material
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