After over 100 years at the heart of downtown Twin Falls, Idaho, Main Avenue would undergo a major reconstruction to make a number of physical improvements while maintaining its historic context. The design delivers a full streetscape and urban design that rebuilds seven blocks of downtown, incorporating existing township plans alongside extensive community engagement.
As the first major project of downtown Twin Falls since the early 1970’s the reconstruction of Main Street addressed a long list of needs from accessibility and pedestrian safety, to adding vibrancy through color and better sightlines around businesses with redesigned landscape features. Elements included street pavement and traffic flow, sidewalks, furnishings zone treatments, utility connections, public gathering spaces, parking management, furnishings, wayfinding, and branding. The design focused on community utility also added curbless festival street (shared street) segments for special events, a public plaza and concert stage, restroom and storage building as well as an overarching integration of public art and historic interpretation. The successful master plan and preliminary design by Otak was followed by the team moving through final design and engineering for the signature downtown Twin Falls project.
In revitalizing the central business district of Carnation, Washington, the reconstruction of four blocks was designed to improve a variety of areas from stormwater and utilities to traffic signage and pedestrian wayfinding. As the prime consultant completing these extensive streetscape improvements, Otak led the design, community engagement, and development of a comprehensive construction sequencing plan to minimize disruption to existing downtown businesses.
A Revitalized Streetscape Emphasizing Pedestrian Connectivity and Low Impact Development
This federally funded project applies a community-character design theme that draws on the area’s history to deliver new streetscape amenities as well as a host of functional streetscape improvements. Unique metal cut-out panels used as banners on street light poles and incorporated into street furniture highlight this theme. The design for core blocks downtown focused on pedestrian connectivity and gathering spaces while underground stormwater quality treatment vaults placed beneath sidewalks function as root-storage, allowing for street trees to be placed within the dense business-district environment. Integrated adjacent to the planter areas are stormwater bioretention facilities creating natural balance with landscape plantings. Use of a depressed-curb intersection design at Bird Street opens the cross-street pedestrian corridor for future festivals and other street events.
To complete a gap in the more than 50-mile Lake Washington Loop Trail system, this segment also provides improved connections to downtown Renton and Boeing. Beginning with a preliminary design study, the Otak design ultimately adds 2,500 feet of an 11-foot-wide cycle track for bicyclists while updating existing sidewalks for pedestrian access.
Connecting a Bike Trail System and Multimodal Access to a Community Business Hub
After a preliminary design study recommended walkway and bicycle facility concepts for 7,000 feet of regional trail near the Renton airport and Boeing plant, this project moved forward in phases beginning with this 2,500-foot segment. In the resulting design, a cycle track and sidewalk were installed along the north side of Airport Way, and over the Cedar River. Due to limitations in right-of-way along Airport Way, traffic lanes were reconfigured to allow for the new cycle track. The project also included utility improvements, bridge handrail modifications, landscape and urban design, improved pedestrian connections, pedestrian lighting, signal updates, and signage. Otak provided surveying, preliminary engineering, final design, right-of-way plans, and construction engineering support.
A section of SH 119 called the Diagonal Highway exists in what was once considered the outskirts of Boulder, but has since become a very busy area. Reconstruction of the Diagonal Highway was designed to improve roadway durability and drainage while adding pedestrian and bike facilities where there were none.
Complex Multimodal Design, Unique Roadway Elements
This complex design includes an extensive new drainage system, off-street bike lanes, multi-use paths, and improved transit facilities. With 400 trees, 4,400 shrubs, and 2,000 perennials, a number of landscape features were integrated into the design. The added green space is supported by a new irrigation system as well as three rain gardens that collect, store, and filter rain water and storm water runoff to naturally remove pollutants. Public spaces, including art plazas, were part of an emphasis on adding community value. Otak managed the design of this multi-phased project along with significant coordination between multiple departments within the City of Boulder, CDOT, RTD, and community stakeholder groups.
Enhancements to Main Street and the commercial district of Lyons, Colorado design pedestrian mobility, active transportation, drainage, and streetscape improvements. Sidewalks and crossings with refuge islands along US 36 also include bike lanes throughout the corridor.
A pedestrian crossing at the Stone Canyon intersection involved a streetscape design that accentuates multi-modal use. The Otak team brought this project from concept to completion while working extensively with the Colorado Department of Transportation (CDOT) throughout the process in achieving a roadway cross section that met the City of Lyons transportation goals.
As one of only a few locations on the island not having an adequate bypass route for emergency vehicles, Oakes Road was designed to provide a bypass in the event that this section of SR 525 becomes blocked. To offset unavoidable wetland, stream, and buffer impacts associated with the construction of the bypass, a compensatory wetland mitigation plan was designed to support local, state, and federal permitting.
Roadway Design with Unique Environmental Implications
A new, two-lane asphalt roadway, Oakes Road included features such as graded shoulders, drainage ditches and culverts; bioretention and infiltration LID facilities; retaining walls; onsite wetland and stream mitigation; utility relocations; channelization; and signing. The federally-funded project was also unique in that it traverses land parcels containing uncut forests and existing homes which ultimately required establishing an alignment that met objectives while also seeking to minimize property impacts and setbacks from existing structures and private wells. The goal of the mitigation site is to enhance an existing low-functioning wet pasture to a high-functioning wetland with a mosaic of wetland habitats using native plants. Otak led the planning and design of Oakes Road along with the wetland delineation and functional assessment, including coordination of environmental permitting, documentation, and plan installation.
The science of engineering is the backbone of the environment we construct around us, and many people perceive engineering in its most common ways. For example, both civil and structural applications are when engineers are most in the spotlight and is arguably the first thing people think about when considering what “engineering” means. These practice areas are often the most visible because they are physical and affect our daily lives as both participators in the built environment and also as members of society.
“I love being able to see a project come to life. It is quite a spectacular feeling to know I have helped bring someone’s idea into reality.”
Hailey Sibert – Otak Civil Designer
However, engineering can be much more varied than meets the eye, and the practice area is defined by the broader applications that a multidisciplinary approach can have on not only the built environment, but also on the communities that call that environment home.
In this post, we’ll explore the ways in which engineering affects multiple facets of society, and show just how important the intersectional practice is to fully functioning communities.
Getting People Around, In Multiple Ways
Transportation engineering immediately comes to mind when thinking about the lesser thought applications of the profession. Options for transportation in the built environment don’t just spring up out of nowhere, and the impact that high functioning transportation infrastructure on communities is hard to overstate.
Quality transportation engineering improves how community members get from place to place and serves as a great socioeconomic equalizer. By increasing access to jobs, opportunities, and services through breaking down transportation barriers, engineering directly uplifts disadvantaged groups within municipalities by ensuring everyone gets an equal shot at getting there.
Multi-modal transportation also plays a role here. Communities don’t solely consist of cars, trains, and busses. Designing pedestrian-friendly areas allow neighborhoods to flourish and encourages healthier, more walkable lifestyles among citizens. Greater still, access between point A to point B is improved for those who do opt for public transport, which decreases reliance on cars. This means everything from sustainability perspective, and it’s all made possible through quality engineering that’s designed to move people, not just vehicles.
Using The Natural Flow of Things
The environmental intersections of engineering with purpose are also huge components of quality design. When we envision communities, we design with natural surroundings and not despite them. By doing this, we place an emphasis on low impact development (LID) which gives way to developing green stormwater infrastructure.
The best part about being a civil engineer is building connections. We building infrastructures and improve transportation networks that connect people and communities.
Eva Ho – Otak Civil Engineer
Without a multidisciplinary approach to this type of engineering, the greener aspects of project work may go unnoticed, or natural systems in place may be harmed or interrupted. Instead, engineers can design around habitats by understanding water flow and hydraulics of the site. In this way , water and natural resources engineers play a critical role in making communities not only sustainable for humans, but also more habitable for other forms of wildlife that may exist alongside something out of the built environment.
Helping the Rain Go Away
Quality water resources engineering also helps us answer unique questions about planning and design, including ones in relation to stormwater and surface water management. One might ask themselves, “When the rain falls, where does it go?”
The answer? It’s been engineered to flow through the community in helpful ways. For one, understanding water detention and retention prevents flooding for neighborhoods already in place. Second, it ensures quality of water for communities and natural habitats impacted by the local watershed and stormwater runoff — engineering for the community of life, not just for people.
“My [engineering] work has given me the opportunity to wear many different (hard) hats. I’ve designed cable stay bridges, a variety of buildings, sculptures… every day is an adventure!”
Greg Mines – Otak Structures Engineer
This ultimately helps prevent more vulnerable communities and areas from experiencing the effects of increased or harmful precipitation by injecting climate resiliency into the existing system, something a traditionally structural engineer might not consider. When multifaceted engineers are tasked with a project, they come up with a multi-pronged way of looking at a project that does more than just house, shelter, or get people to work on time.
Finding the Perfect Place for a Project
Engineering helps us answer even more pertinent questions about the built environment and our relationship with it, even before construction begins. So, just what happens on a site before we start building on it? Choosing the right spot to begin work involves a lot more than one would think.
Scrupulous engineering considers all the possibilities in order to find the right place for a project based on a goals and initial design, giving way to the practice of site development. Coming up with creative, practical, buildable, and permittable solutions is the work of engineers as well, and good ones are context sensitive (to cultural and natural resources that exist around a site) before building starts. Design efficiency has everything to do with pre-construction, from choice of materials to making sure things go smoothly from both a budget and site complications perspective. Engineering opens doors to deeper understanding of a project, not just the calculus to get it done, to ensure timely project delivery.
Enjoying Outdoor Spaces
As much impact as good engineering can have, sometimes the work is about leaving that impact with a minimal footprint. This can not only benefit clients, but members of the community that the project might impact. So much of engineering is about enhancing our open spaces and natural landscapes with low-profile infrastructure that allows for greater access and enjoyment from the populace, which can be as simple as a well-placed jungle gym or as complex as designing administrative facilities for parks and natural attractions.
Bike paths, multi-use paths, all of these are often not thought of as a crucial bit of engineering, however they double down on active transportation of the area while continuing to encourage a healthy lifestyle.
Trails and trailheads play a similar role — allowing people to access and connect with nature while preserving the spaces in which they exist and generating interest in the natural environment while in an effort to preserve it.
The thing I like most about working at Otak is the awesome, interdisciplinary team that I get to work with.
Chris Romeyn – Otak Sr. Water Resources Engineeer
And again, even before construction or the start of a project, feasibility studies in these environments also fall into the wheelhouse of engineering, ensuring the safety, sustainability, and resiliency of the site so people can enjoy it, catching problems in advance that might hinder project completion.
Multiple Engineering Disciplines, One Team
The work of engineers at Otak is multi-faceted and interdisciplinary, and we’re proud that our work goes toward the betterment of the communities we serve. The voices, experience and expertise of the engineering teams within our ranks reflects what their work means to them. Take a closer look at the depth and breadth of project work from one of our most esteemed and recognizable practice areas.
Adding to an existing trail system, the Airport Road Pedestrian Underpass provides safe crossing beneath eastbound SH 119, as well an at-grade crossing on the roadway’s westbound lanes. The design by Otak was completed while accounting for high traffic volumes, working in close coordination with the Colorado Department of Transportation (CDOT), and includes a number of solutions aimed at optimizing the trail user experience.
Innovative Structural Solutions for a Safer Trail Experience
While adding approximately 4,000 linear feet of trail, the Airport Road Pedestrian Underpass incorporates several innovative design solutions to optimize the user experience. A unified drainage system that addressed the high groundwater table and retaining wall system to avoid tight right-of-way (ROW) impacts are among those design solutions. Groundwater mitigation – with consideration of adjacent wetlands – along with cast-in-place aesthetic features are also included. To facilitate two phases of construction, the project included a temporary shoofly roadway in completing utility relocation, lighting, signal modifications, and modifications to existing driveways.
The reconstruction of a 3,700-foot segment of pedestrian path of Cottontail Trail in Boulder Open Space and Mountain Parks improved its longevity. Over a three month duration, Otak played a critical role in evaluating the existing trail and building a team to successfully complete improvements that make the park more sustainable and ADA accessible.
Trail Improvements Add Durability and Accessibility
Cottontail Trail was realigned steep sections to meet ADA grade requirements and ditches for improved drainage. The design also replaced an existing turnpike section to eliminate its need for constant repairs which included an armored ford consisting of a concrete tread section with 24-inch culvert pipes. Colored concrete with exposed aggregate finish was selected to provide a durable, low-maintenance surface that blends well with the rustic rural character of the area. Otak was responsible for ensuring that the work was done right and on schedule despite numerous changes, acting as the eyes and ears for the owner throughout the construction process.
In expanding the city’s extensive trail system to regional transit and developing neighborhood, the CO 42 Underpass provides a safe and user-friendly grade-separated crossing. A concrete box culvert as well as new sidewalk/trail connections and utility relocation were included in the project. In leading the design, Otak also provided project management services during the construction phase.
A User-Friendly Crossing to Increase Active Transportation Connectivity
After completing an Open Space and Trails Wayfinding project – which also led to the McCaslin Boulevard Underpass – identified improvements to the Lake to Lake Trail, the CO 42 pedestrian underpass represents one of several investments by the city in transportation and supports its goal of safe traveling conditions for pedestrians and motorists. By strengthening the city’s approximately 32-mile trail network with better connectivity, the underpass encourages active transportation with more walking, running, and cycling in the community. The construction of a concrete box culvert running underneath CO 42, along with the relocation of several utilities and the Goodhue Ditch, created a pedestrian thoroughfare that closes an important gap in the Lake to Lake Trail.
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