the building has an evolving set of “maker” spaces ranging from metal, wood, and composite fabrication shops to a test kitchen, café, retail outlet, and a rooftop garden. as the lead 2022世界杯美洲杯预选赛 firm for this expansive project, the snyder & associates team was tasked with developing a site plan that would blend with the existing campus surroundings while at the same time creating a safe and welcoming environment for students.

demolition, historic preservation, & utility coordination highlight development plan

to accommodate the modern facility in the middle of the iowa state campus, our team was faced with 2022世界杯32强预选赛 the demolition of a portion of sweeney hall and the underutilized nuclear engineering building. these plans had to account for an active campus environment and the constrained site location. additionally, the design team needed to take extra precautions so as not to disturb the foundation of the marston water tower located adjacent to the site. this 168-foot-tall, iconic tower is listed on the national register of historic places.

the proximity of the marston water tower to the site required meticulous 2022世界杯32强预选赛 by the design team.

as a further challenge to the team, the building site contained a congested area of underground utilities, including storm sewer, sanitary sewer, steam tunnel, electrical primary feeders, natural gas lines, and telecommunication. daily communication with the onsite mechanical, electrical, and plumbing contractors was necessary for seamless coordination. 2022足球世界杯小组赛赛程 , a subsidiary of snyder & associates, was enlisted to create the new electrical vaults and steam tunnel designs in the tight quarters.

the design team also utilized phased construction by creating bid packages for the building and site demolition, site utility installation, building construction, and site restoration. this method further streamlined the entire site development and building construction process.

underground stormwater detention & multimodal accommodations

running along the west side of the building location, bissell road is the main thoroughfare through campus. however, the storm sewer system along this route was nearing capacity even before this project was envisioned. our team devised a plan to install an underground stormwater detention system to provide adequate drainage for the new building site. with the already congested utility issue in the area, adding this system took meticulous 2022世界杯32强预选赛 . our team determined that two strategically placed stormtech stormwater chamber systems could adequately handle the site’s stormwater needs.

the stormwater detention basins were hidden under parking and driveway areas.

these chambers, or vaults, consist of large sections of corrugated plastic placed on a compacted gravel bed. once covered, stormwater is diverted to the basin through normal channels where it’s temporarily stored. it’s then released through a series of outlet pipes specifically designed to let water out in a controlled manner to mitigate flooding.

like several other projects our team has designed for iowa state university and other college campuses, the need for multimodal accommodations was a chief concern. to meet this need, safe and expansive pedestrian walkways, and convenient bicycle parking were included in the external design, along with separate building access for vendor and maintenance traffic.

iowa state’s new student innovation center was designed with future changes and reconfigurations in mind. the interior building systems were left exposed for just this reason. the all-glass exterior was designed to reduce the building’s solar heat gain and simultaneously capture daylight to reduce energy consumption. these forward-looking ideas promote the sustainability of modern innovation and position this world-class structure for leed gold certification soon. undoubtedly, this award-winning facility will inspire many more generations of iowa state students.

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steam pipes run through an old section of utility tunnel on the university of iowa campus.

the labyrinth of utility networks running under the streets, homes, and businesses of iowa city has sections that date to the mid-1800s. several of these tunnels exist as conduits for steam pipes to heat buildings on the university of iowa campus. one such passage, known as the old capitol tunnel, runs along the east curb line of madison street. stretching from the universities power plant to the pentecrest, this tunnel is critical to the steam service on the east side of campus. it provides a path for condensate return to the power plant and completes a significant east campus steam loop providing operational reliability to the entire campus.

due to its susceptibility to flooding, a section of the old capitol tunnel between burlington street and washington street had deteriorated to a point that replacement was necessary. an engineering team with snyder & associates was brought on board to develop a solution that would meet the needs of a number of end-users. in lieu of dismantling and constructing a new tunnel section, our team developed a plan to replace the tunnel with a series of direct-buried pipes and concrete vaults spaced at appropriate intervals.

utility coordination & streetscape improvements

3-d modeling software was used to locate and track the multiple utilities in the reconstruction area.

in addition to the direct-bury steam/condensate utility replacement, this project also involves a high level of coordination with other university, city, and franchise utilities along the madison street corridor. there are numerous locations where the proposed direct-bury replacement piping crosses existing water, chilled water, sanitary sewer, storm sewer, electrical and communication duct banks, and lighting circuits. to coordinate this highly complex environment, 3-d modeling software was used by our engineering team to map the utility structures and plan the necessary relocations as the project progressed.

this project also includes a streetscape component aimed at restoring the surface features following the utility construction. the streetscape features include plantings, upgraded sidewalks and crosswalks, and other amenities targeted to the college students, such as convenient bike parking and multiple waste receptacles. improvements to transit facilities, including bus stops and shelters, as well as safety improvements within the adjacent seamans center are also part of the project scope.

a high degree of coordination is necessary to formulate a construction phasing and traffic control plan that accommodates the construction activities while considering the needs of building users, transit mobility, the general 世界杯足球比赛预选赛 , and other construction projects occurring within the area. this complex, snyder & associates-designed project is currently underway with substantial completion targeted for the late summer of 2021.

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a monument placed between the pavilions recognizes the supporters and sponsors of the farmers’ market.

farmer’s markets are much more than a place to buy and sell fresh produce and other locally sourced items. for some, a recurring farmers’ market provides a place to socialize, exchange recipes with friends and acquaintances, and an opportunity to support local family farmers. founded in 1998, the farmers’ market group in atchison, kansas, has provided a heaping dose of all those elements. but at their outdoor location along main street, the one thing they didn’t have was protection from inclement weather.

from the start, the atchison farmers’ market was held in a large expanse of parking lot adjacent to the 5^th street viaduct bridge. when the farmers’ market group approached city leaders about their need for an adequate structure to shelter market vendors and patrons from the elements, the city turned to snyder & associates to help guide the effort. our team set about gathering feedback from end-users to help drive design decisions, provide the amenities required by the group, and recommend pavilion shelter options that would be both aesthetically pleasing and practical.

outdoor space that meets market group requirements

as part of the design and construction services provided by our team, extensive consideration was given to creating an environment that directly complemented the existing features in the area, including cohesion with the mosaic tile walls created by the atchison art association several years prior. these walls add an artful element to the market site, as well as provide a buffer between the market location and the adjacent rail yard. the design team also accommodated for a future 10-foot wide trail tying the market area to the river walk.

other “must-haves” on the group’s wish list was a desire for safe and efficient vehicle and pedestrian access to the structures, including full ada compliance. repairs and modifications to the existing pavement in the parking area would be necessary to accommodate the needed improvements and adjust for utility coordination relative to footings for any new structure.

pavilion structures provide protected environment for market users

after compiling all relevant information while working with the city, art association, and the farmers’ market group, the snyder & associates team recommended the construction of two, 120’ x 40’ pavilions, one on each side of the 5^th street viaduct. these structures would include lighting and electrical outlets, provisions for ceiling fans, and a curb reconfiguration and new pavement that allows direct vehicle access for vendors.

our group acted as the primary project coordinator and site designer for the city. we developed the plans and specifications that allowed city personnel to directly purchase the pavilion structures and bid a site improvement package for the associated pavement modifications. snyder & associates also coordinated with the various suppliers and contractors involved and determined appropriate milestones to keep the project on time and at budget. when the project commenced in the fall of 2018, one critical requirement included the completion of the improvements in time for the farmers’ market mid-may opening in 2019. our team worked diligently with city leaders and market vendors to achieve this critical goal.

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snyder & associates’ project manager andy burke, p.e., (center) accepts an acec-ia honor award for the first avenue grade separation project during the 2018 engineering excellence awards program.

first avenue in iowa city, iowa serves as a main north-south arterial roadway. every day, approximately 13,000 vehicles utilize the corridor with future traffic volumes expected to increase dramatically. due to the mixed-use development in the area, including south east junior high school, the corridor also carries a notable amount of pedestrian and bicycle traffic.

bisecting 1^st avenue just south of the junior high school is a pair of railroad lines owned by the iowa interstate railroad (iais). an average of three trains per day pass through the area and block 1st avenue. this resulted in major traffic delays and safety concerns for vehicles and pedestrians. traffic studies reported an average vehicle wait time of 10 to 20 minutes while the crossing was blocked by slow-moving trains. commuters that chose to explore alternative routes were detoured four miles west to the nearest grade-separated crossing at summit street.

recognizing the need for improved traffic flow and safety throughout the corridor, iowa city officials began exploring their options in 2005. unfortunately, seasonal flooding and other unforeseen circumstances postponed the project for many years. in 2014, snyder & associates was contracted to design a solution to improve the corridor with the goal of avoiding conflicts with train traffic altogether and allowing for seamless traffic flow along 1st avenue. instead of creating a vehicle overpass to separate the trains from vehicle traffic, the design team quickly realized that the best course of action was to lower 1^st avenue approximately 16.5′ and raise the railroad tracks 5′ to pass over the roadway.

construction challenges addressed by a creative design

the project incorporated a unique design that required a significant change in grade and infrastructure construction. the challenges to staging and completing a project of this magnitude were substantial. most critical to the project was keeping all transportation corridors open to the fullest extent during construction. this included an open passage for vehicle traffic, as well as train traffic.

another major design concern was how to deal with stormwater runoff. since the roadway would be substantially lowered, the area under the train tracks could become inundated during periods of heavy rain. initially, a storm sewer pumping station was viewed as the best solution. however, during the design stages, the team was able to eliminate the need for the pumping station by finding a means of gravity draining the site. this resulted in significant savings in terms of construction costs and ongoing maintenance. finally, all aspects of the project had to be carried out in a fully-developed area without having a direct impact on existing structures.

traffic staging, shoofly railroad tracks, & aesthetic features

complete snyder & associates/2022足球世界杯小组赛赛程 project team pictured above, front row (left to right): subhija rahmanovic, structural engineering; diane goering, pla, landscape architecture and aesthetics; andy burke, p.e., project manager; todd knox, p.e., ptoe, traffic signal and street lighting. back row (left to right): jerome hatlewick, p.e., structural engineering; heather fritz, engineering technician; jordan gustafson, structural engineering; rich voelker, p.e., project director

to address the vehicle traffic along the corridor, the design coordinated an onsite detour allowing one lane of traffic to traverse the corridor in each direction. this plan was simple, effective, and it kept traffic flowing while also providing a large area for construction to occur.

maintaining unimpeded service for the iais, however, required a little more creativity. to that end, a shoofly railroad track was designed and utilized. shoofly tracks were originally used by railroads in mountainous regions. these temporary tracks were primarily used to carry trains around mudslide areas. but in modern roadway construction, they’re utilized as a solution for keeping train traffic moving.

the rest of the project called for a new railroad bridge, street paving, retaining wall, storm sewer, and water main. the existing four-lane roadway was reconstructed as a three-lane section with a bike lane in each direction. the massive retaining walls required along the corridor were constructed to include aesthetic elements, such as a decorative form liner, stain, and aluminum railings.

detailed staging plan keeps project on-task

project team members pictured above (left to right): jordan muller, peterson contractors; zach steffen, peterson contractors; jason reichart, city of iowa city; troy culver, snyder & associates; andy burke, snyder & associates; jason havel, city of iowa city

construction consisted of five main stages beginning in the spring of 2015 and concluded in the fall of the following year. the initial stages included the installation of the new water main, storm sewer, and construction of the shoofly tracks. the middle stages included building the retaining walls, bridge abutments, and wing walls, performing grading and paving work, and installing the new iais railroad bridge.

latter stages saw the completion of mainline paving and junior high paving, along with a critical closure to connect the new iais railroad across the onsite detour roadway. the final retaining wall and side path construction wrapped things up, along with an adjacent parking lot.

the total project construction cost was approximately $10 million. project funds included $2.4 million from the surface transportation program (stp), $500,000 from the traffic safety improvement program (tsip), and $550,000 from the iais. the remaining dollars were covered by general obligation bonds.

during the iowa chapter of the american 世界杯足球比赛预选赛 works association’s (apwa) annual fall conference awards banquet in 2017, snyder & associates proudly joined staff members from peterson contractors, inc. and the city of iowa city to accept the project of the year award in the transportation category, greater than $2.5 million. the project also received the american council of engineering companies (acec) of iowa honor award in the transportation category during the 2018 engineering excellence awards program on may 9, 2018.

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