section 1: structural and geotechnical - · pdf filesection 1: structural and ... system for a...

CE/GeoE 4102 Capstone Design, Spring 2009 of 12

CE/GeoE 4102: Capstone Design, 4cr Tuesday and Thursday: 4:00 pm to 5:15 pm Section 001, Room 210 CivE Section 002, Room 202 or 210 CivE

The Spring 2011 Semester of the University of Minnesota Civil Engineering Capstone Program is brought to you by the following mentors and their respective employers: Nathan Barnes, self-employed

Bill Cooke, Metropolitan Council (MCES) Paul T. Eickenberg, Wenck Associates

Nick Erpelding, Westwood Professional Services Suresh Hettiarachchi, HDR Engineering

Stephanie Johnson, Houston Engineering Jonathon Kusa, Howard R. Green Co.

John Larson, HDR Engineering Jihshya Lin, Mn/DOT Bridge Office Tom E. Lorentz, AEC Engineering

Matthew Lueker, St. Anthony Falls Laboratory Kevin MacDonald, Cemstone Products Company

Andrew McGovern, Howard R. Green Co.

Dan Mielke, Howard R. Green Co.

Jerome Mulvihill, HDR Engineering

Randy Newton, City of Eden Prairie

Matt Pacyna, SRF Consulting

Jeff Peltola, Wenck Associates

William S. Pim, Xcel Energy

Scott Poska, SRF Consulting

Dan Slegh, Mn/DOT Bridge Office

Tom Sohrweide, Short Elliott Hendrickson

George Sprouse, Metropolitan Council (MCES) Enhui Tan, HDR Engineering

Craig Taylor, St. Anthony Falls Lab.

From last year: Lisa Buchli, U.S. Army Corps of Engineers

Amanda Clements, HGA Architects and Engineers

Tom Fidler, Bonestroo

Kevin Gardner, Pierce, Pini and Associates

Chanel Kass, U.S. Army Corps of Engineers

Elizabeth Kinderman, Xcel Energy

Frank Qie, Xcel Energy

Matt Redington, HDR Engineering

Matt Ricker, BKBM Engineers

Mentors are the reason that Civil Engineering

Capstone Design at the University of Minnesota is a success. Thank you for being part of this class!

Section 1: Structural and Geotechnical 1.1 Design of Mn/DOT Bridge No. 05017 Mentors: Jihshya Lin, PE Principal Engineer Mn/DOT Bridge Office (co-mentor) Office: (651) 747-2199 E-mail: [email protected] Dan Slegh Grad I Engineer Mn/DOT Bridge Office (prime mentor) E-mail: [email protected] Students:

Mn/DOT is widening Trunk Highway (T.H.) 23 to four lanes from the T.H. 95 junction to the T.H. 25 junction in Foley. This will require Mn/DOT to construct

a bridge for the new southbound T.H. 23 over the Elk


River at about 1.5 miles east of the junction of T.H. 95. It's a single span bridge, about 112' long, 45'-4" wide and has a 30 degree skew. MnDOT will provide some software for the bridge geometry and structural design. There will be a geotechnical report for the soil properties that will be used for pile design. Attached is the preliminary design plan for the bridge. The Capstone team will need to design this bridge to meet the requirements specified in the “AASHTO LRFD Bridge Design Specifications”, 2010 edition. This project of designing Bridge No. 05017 will include the following tasks:

• Review the scope of work from the planning documents, the grading plan, the geotechnical report and the hydraulic recommendations letter to generate the bridge layout and geometry.

• Based on the defined bridge geometry, evaluate options for different types of bridge superstructure and substructure, and propose the best valued bridge type for Mn/DOT to consider.

• Upon Mn/DOT’s approval of the recommended bridge option, prepare a preliminary bridge design plan with approximate bridge width, length, vertical clearance, superstructure and substructure layout, and basic survey data sheets for Mn/DOT’s review.

• Upon Mn/DOT’s approval of the preliminary bridge design plan, prepare a final bridge design plan with general layout containing working points and elevations, abutment plan sheets, beam sheets, deck sheets, and details. Mn/DOT will approve and sign the final bridge design plan.

Attached is the official preliminary design plan for reference. Both mentors will guide the design team step by step in this design process, following Mn/DOT’s procedures in bridge design and plan preparations. Mn/DOT will provide the AASHTO Specifications, Mn/DOT LRFD Bridge Design

Manual, software and spreadsheets used in design, and any other guidelines needed for this bridge design.

Google Maps coordinates: 45.604371, -94.032755


1.2 Mentor: Tom E. Lorentz, PE AEC Engineering 15 South 5th Street, Suit 400 Minneapolis, MN 55402 Office: (612) 330-0250 Fax: (612) 334-3101 E-mail: [email protected] Students:

1.3 High Performance Mass Concrete

Foundations Mentor: Kevin MacDonald, PhD, PE, FACI Cemstone Products Company Cell: (612) 363-7111 E-mail: [email protected] Students:

The foundation and superstructure elements of the I-35W St Anthony Falls

bridge require concretes with unique and in some cases competing properties. The concrete needs to set and gain strength quickly, resist the ingress of chlorides, reduce the quantity of carbon dioxide generated relative to conventional concrete, self level and generate low heats of hydration. The students would develop, batch and test concretes with

significant reduction in clinker content in order to balance these competing requirements. I would work personally with the student, and we would make our materials labs, microscopy labs and design software available to them. 1.4 Xcel Energy Transmission Line Foundation Mentor: William S. Pim, PE Transmission Engineer Xcel Energy 414 Nicollet Mall, 7th Floor Minneapolis, MN 55401 Office: (612) 330-1904 Fax: (612) 330-6590 E-mail: [email protected] Students:

The purpose of this project is to develop a foundation system for a 500 kV guyed V transmission tower. The new foundation system design will be used to replace the existing transmission tower foundations used in the Winnipeg to Minneapolis 500 kV transmission line. This transmission line transmits power between the U.S electric company Northern States Power Company (a subsidiary of Xcel Energy) and Canada’s Manitoba Hydro.

Straight towers are currently in place along the transmission line. In the event that a straight tower is damaged, it will be replaced with a new guyed V tower. The existing foundations are not compatible with the new guyed V transmission towers. Xcel Energy has a solution to this problem for approximately 95% of the entire transmission line. The foundation design of this project covers the remaining 5% of the line.

The scope of this project includes the design of the foundation system and an outline of the construction process of the foundation. The foundation design and installation will have various constraints including time, accessibility, soil conditions, and constructability. The layout of the foundation, the anchor design, the connection design, and the concrete mix design will have to be considered. Specific recommendations for actions to be taken by Xcel Energy as well as a recommended day-by-day plan outlining the installation process of the designed foundation and guyed-V tower will have to be specified.

Details of construction planning are also included in the scope of this project. These details include determining the access methods to the work site, the procedure for constructing a workspace, the machinery to be used, appropriate anchors and their installation, formwork to be used for the concrete, and the method of placing of the concrete. Construction sites will typically have no road access.


1.5 Photo Voltaic Power Generation Facility Mentors: John Larson, PE Enhui Tan, PE Jerome Mulvihill, PE HDR Engineering Inc. 701 Xenia Avenue South, Suite 600 Minneapolis, MN 55416 E-mail: [email protected] Students:

• Hydraulic/Hydrologic – Determination of mean, minimum

and maximum lake level, fetch and wave analysis, establishment of platform design elevation. Determination of likely ice and mooring loadings.

• Foundation – Determination of typical foundation soil conditions in a marine setting. Development of geotechnical investigation scope of work based on typical land based investigation and marine setting.

• Structural Analysis and Design – Group pile analysis for the wind turbine, wave, ice, mooring and other loadings. Structural design of the main structural components – pile, bracing location, and platform.

• Report and Drawings. • Presentation. The Capstone Project Team will work directly with the HDR team working on wind turbine foundation design projects. 1.6 Dam Rehabilitation Mentors: Paul T. Eickenberg, PE Geo-Structural Engineer E-mail: [email protected] Wenck Associates, Inc. 1800 Pioneer Creek Ctr., Maple Plain, MN 55359-0249 Office: (763) 479-4253 Cell: (612) 741-9428 Students:

A large length of levee is required to be assessed for stability due to the replacement of an existing 48-inch

Projects 1.7 to 1.9 are old projects from spring or

fall 2010. The mentors have been contacted, but have not

indicated that they will offer a project. 1.7 College Sports Fieldhouse Green Roof Initiative Mentor: Matt Ricker, PE Associate BKBM Engineers 5930 Brooklyn Boulevard Minneapolis, MN 55429-2518 Office: (763) 843-0420 Direct: (763) 843-0449 Fax: (763) 843-0421 E-mail: [email protected] Students: Saura Jost [email protected] Jayson Newman [email protected] David Wirt [email protected] Jordan Horejsi [email protected]

A liberal arts college has just announced a new 52,000 square foot Athletic Facility to be built on campus. The fieldhouse portion of the facility requires a roof structural

system that will span 165 feet. At the first meeting, the college president presented the proposed facility floor plan and instructed the structural design team to do the following: “The college is interested in a state of the art green roof initiative for the fieldhouse, but is reluctant to proceed with any announcement until we understand the cost of such an endeavor. For two different framing layouts, compare a typical roof structure to a ‘green’ roof structure. Provide the college with structural images and the structural frame costs associated with adding a prairie grass assembly to the roof.” The design team will be given proper design parameters as well as access to computer analysis software. Our goal is to present to the college, two cost effective solutions, incorporating 3D modeling techniques that describe each roof structure and the associated costs.


1.8 Structural Modeling and Evaluation of Coal Crusher Building

Mentors: Frank Qie, PE Civil/Structural Engineer Office: (612) 330-1904 Fax: (612) 330-6590 E-mail: [email protected] Elizabeth Kinderman

Civil/Structural Engineer Engineering & Construction Sherco: (763) 261- 3854

Cell: (847) 769-4912 E-mail: [email protected]

Xcel Energy 250 Marquette Avenue, Suite 700 Minneapolis, MN 55401 Students: Daniel Kapchinski Gannon-Stromquist LeVoir Alex Pearson Steve Wilk

Xcel Energy’s Sherburne County Generating Plant (Sherco), located in Becker, MN was

originally constructed in the 1970’s, with expansion taking place in the mid-1980’s. The plant is a coal-fired generating plant with the capability of producing 2400 megawatts, making it the largest plant in the company’s fleet. As part of the original construction, the Crusher Building was built, consisting of steel fames, concrete floor deck and metal cladding. During the expansion in the 1980’s, the structure was added to in order to connect and support a coal conveyor. The Crusher Building houses the equipment used crush the coal before it is transferred to the main building via the conveyor system. The building measures The 175 feet x 80 feet and is 123 feet tall.

Over the past few years, plant personnel have observed excessive deflections of the structure during conveyor startup. Based on the preliminary structural inspection, the integrity of the building appears to be in sound condition. Although there is no evidence of imminent failure, there is some concern about the fatigue of the steel structures and connections due to the

frequent, excessive deflection. Pipes in contact with the building structure show signs of significant wear due to abrasion, which indicates that the cycles of the building movement have been high. The scope of the engineering project will include the following: • Develop a comprehensive computer model of the existing

crusher building structure; • Perform structural analysis under the conveyor loading and

other existing/intended loading conditions based on the computer modeling;

• Evaluate stress conditions of the existing structure, including cause and long term effect of the observed excessive deflections;

• Develop design solutions to retrofit the structure, in order to reduce the excessive deflections and to address future safety concerns under the operating loads.

1.9 St. J Vertical Expansion of Existing ACC

Building Mentor: Amanda J. Clements PE Associate HGA Architects and Engineers 701 Washington Avenue North Minneapolis, MN 55401 Direct: (612) 758-4478 Fax: (612) 758-9478 E-mail: [email protected] Students: Dylan O’Donnell Jonathan Morris Marcus Orrock Riley Moldenhauer A metro-area hospital needs to increase the capacity of their existing facilities. An additional 36 beds are desired. After a master planning study, it was determined that the best course of


action is to build a vertical expansion on the existing two-story ACC (Ambulatory Care Center). The project includes two new floors, each 30,500 square feet, above the existing ACC, which is a steel frame and composite slab building. The air handling units on the roof of the existing building will be reconstructed or replaced on the roof of the new expansion. All existing air shafts will be reconnected to serve the existing two floors of the building. The ACC building needs to remain occupied during the entire construction of the vertical expansion. The first floor of the expansion (third floor of the building) will need to be 16’ floor-to-floor in order to align with the existing height of this floor of the patient tower. The second floor of the expansion (fourth floor of the building) will measure 14’ floor-to-floor. The design documents of the original ACC building, dated 1997, indicate that the building was designed for 2 levels of future vertical expansion. Structural challenges for this project will be to accommodate the new expansion and architectural design within the existing column grid. The capacity of all existing members, including foundations, will need to be checked and any members that are not adequate will need to be reinforced. The most efficient structural systems will need to be designed so that the additional load is kept to a minimum while still meeting the numerous constraints on structural depth and layout required to accommodate the existing and future mechanical systems.

Section 2: Environmental, Water and Transportation 2.1 Project: Diamond Lake Total

Maximum Daily Load (TMDL) Mentor: Stephanie Johnson, Ph.D., P.E. Houston Engineering, Inc. Maple Grove, MN Office phone: (763) 493-4522 E-mail: [email protected] Students: Diamond Lake is a 1,565-acre lake located in Kandiyohi County, within the jurisdiction of the Middle Fork Crow River Watershed District (MFCRWD). The lake is classified as a 2B water by the State of MN with designated beneficial uses including the support of cool- and warm-water fishery, associated aquatic life, and their habitats. Aquatic recreation of all forms is also designated as a beneficial use for this water. Diamond Lake was included on the 2006 MN Pollution Control Agency’s (MPCA) 303(d) List for impaired aquatic recreation

due to excessive nutrients, specifically total phosphorus. Due to its impaired status, the lake must have a TMDL study completed for it. Efforts are now required to complete the statistical analysis of the monitoring data, use the monitoring data to develop water quality models of the watershed and lake, and complete the load allocation and the implementation plan. Among other tasks, HEI will use water quality data from three shallow lakes that flow into Diamond Lake to determine if those lakes are also impaired and in need of resource management.

2.2 BMP watershed analysis for the Villa Park sub-watershed Mentors: Jonathon Kusa, P.E., LEED AP

Surface Water Group Leader E-mail: [email protected] Direct: (651) 659-7777 Main: (651) 644-4389 Fax: (651) 644-9446 Andrew McGovern Project Engineer Dan Mielke Howard R. Green Company Court International Building 2550 University Ave W, Suite 400N St. Paul, MN 55114 Students:

The Villa Park Subwatershed

drains to Lake McCarrons in Roseville, which was identified in the strategic management plan of the Capitol Region Watershed District as requiring nutrient load and volume reduction to achieve desired water quality. This analysis includes hydrologic


and hydraulic modeling (HydroCAD or XPSWMM) of the subwatershed to identify potential areas for volume reduction Best Management Practices (BMPs). In addition, the project will include P8 modeling of the proposed BMPs to estimate reduction of total phosphorus (TP) loads. It is anticipated that the Capstone class may be able to complete concept BMP designs as part of the project. 2.3 Causes of Flow Regime Transitions in

Sanitary Sewer Force Mains Mentors: Bill Cook, P.E. Engineering Manager, Technical Services Metropolitan Council - Environmental Services 390 Robert Street North, St. Paul, MN 55101-1805 Direct: (651) 602-1181 Fax: (651) 602-1083 E-mail: [email protected] Matthew Lueker St. Anthony Falls Laboratory University of Minnesota 2 Third Ave. S.E. Minneapolis, MN 55414 Direct: (612) 626-3058 [email protected] Students:

The Metropolitan Council operates a wastewater interceptor system that serves

an approximate population equivalent of 3 million people. The interceptor system has a number of large pumping stations some of which have long force mains, in which flow transitions from pressurized pipe flow to free-surface gravity flow and back can occur a number of times. High and low points in the sanitary sewer pipes pose specific flow problems related to the accumulation and release of air. Traditional design approaches do not address these changes in flow regime. The changes in flow regimes and their impact on the pumping head characteristics are currently not well understood, and are believed to be one cause of the failure of pump stations to deliver their design capacity. A better understanding of these flow behaviors is desired. The student team will make hydraulic analyses of flow in mildly sloping pipe systems, make experimental observations in a physical model, and develop tools that will be useful to make future designs more successful. Experiments as well as analyses of sloping pipe systems with high and low points will be conducted by the capstone team, to develop a better understanding of the placement and operation of air release valves and other potential measures necessary to prevent

pressure surges in the pipe systems downstream from pumping stations. The design team will: • Improve and operate a physical model to observe and

document air movement and air restrictions within flow transition areas.

• Make changes to the physical model to determine impact of changes in the design.

• Develop alternatives to mitigation of those negative impacts to the pumping characteristics.

• Provide a final report that recommends design approaches to mitigate the problems associated with the flow transitions in long force mains.

• Gain a better understanding of hydraulic transitions within a closed conduit.

2.4 Engineered surface for improving in-

situ soil bioremediation efficiency by temperature control

Mentor: Craig Taylor and Nathan Barnes St. Anthony Falls Laboratory University of Minnesota 2 Third Ave. S.E. Minneapolis, MN 55414 E-mail: [email protected] [email protected] Students: In-situ bioremediation is a popular technique for cleaning polluted soils and shallow groundwater. The basic concept is to promote the growth of natural bacteria that consume the pollutant (such as gasoline). Most bacteria consume pollutants faster at warmer temperatures. This makes heating of the soil an attractive alternative for improving bioremediation efficiency; unfortunately, traditional heating methods are typically cost- prohibitive. Ongoing research suggests that it may be possible to


modify the ground surface cover to collect enough solar heat to improve bioremediation efficiency in the soil and shallow groundwater. The tasks for the design team are (1) perform heat transfer model simulations to determine what types of temperatures changes in the soil are possible (2) determine which microbes and bioremediation processes could benefit the most from temperature improvements, (3) design an engineered surface to maximize subsurface heating. This project will be part of ongoing research and the results will be incorporated into a larger research project. 2.5 Project description not available yet Mentor: Suresh Hettiarachchi, PE

HDR Engineering Inc. 701 Xenia Avenue South, Suite 600 Minneapolis, MN | 55416

Office: 763/591-5480 E-mail: [email protected]

Students:

2.6 MCES Eagles Point WWTP – Primary Sludge Gravity Thickening and Fermentation Optimization ___________________________________________ Mentor: George Sprouse, Ph.D., P.E. Metropolitan Council Environmental Services Metropolitan Wastewater Treatment Plant 2400 Childs Road St. Paul, Mn 55106 (651) 602-8771 (office) (651) 307-2102 (cell) [email protected]

Metropolitan Council, Environmental Services owns and operates the Eagles Point

Wastewater Treatment Plant (WWTP) located in Cottage Grove, MN. The plant serves the eastern Metropolitan area including portions of Cottage Grove and Woodbury. The facility has a nominal design treatment capacity of 10 million gallons per day

(mgd) and currently receives approximately 4.5 mgd of influent sewage flow. The Eagles Point WWTP’s liquid treatment train consists of primary clarification with alum (aluminum sulfate) addition capabilities for chemical phosphorus removal, activated sludge biological treatment (including enhanced biological phosphorus removal), secondary clarification, and seasonal ultraviolet light disinfection. The facility’s solids handling consists of gravity thickening of primary sludge and gravity belt thickening of waste activated sludge. Thickened sludge is transported to other facilities for stabilization and ultimate beneficial use.

Within the design concept of the facility the primary sludge gravity thickener has the dual purposes of (1) concentrating the primary sludge to reduce the amount of thickened sludge hauling and (2) fermenting the primary sludge to generate volatile fatty acids (VFAs) in the thickener overflow return stream and thus foster enhanced biological phosphorus removal in the activated sludge system. Capabilities including timed and cyclic feed pumping, recirculation options, timed and cyclic thickened sludge drawoff are available to achieve these dual purposes. However, the optimal approach to operation of the gravity thickener is undetermined at this time. The design team will (1) investigate and determine design criteria for gravity thickening of primary sludge, for fermentation of primary sludge, and for the operation of single unit thickening/fermentation processes; (2) generate a computer model of or other design/analysis tool for the Eagles Point WWTP fermenter/gravity thickener unit process; (3) use the analysis tool to test alternative methods of unit process operation using both the available capabilities and any appropriate new capabilities and new facilities needed to achieve optimal operation, (4) identify the optimum approach based on consideration of the various tradeoffs including sludge thickness, amount of required sludge hauling, VFA generation, impact on enhanced biological phosphorus removal, and avoided chemical phosphorus removal costs and (5) design system modifications and additions needed to implement the optimum approach.


2.7 Broadway Avenue (CSAH 2) Improvements Project Mentors: Scott Poska, PE, PTOE [email protected] Matt Pacyna, PE [email protected] SRF Consulting Group, Inc. 1 Carlson Parkway North, Suite 150 Minneapolis, MN 55447

Phone: (763) 249-6923 Fax: (763) 475-2429

Students:

Background Broadway Avenue (CSAH 2) roadway

improvements are needed in Forest Lake, Washington County. Broadway Avenue is an arterial roadway that connects the center of Forest Lake to I-35 and suburbs to the west. It has many commercial driveways with poor access management. The Broadway interchange at I-35 is nearing capacity and will be reconstructed in the near future. Broadway is currently a 5-lane roadway and is in need of access management and additional capacity to meet existing and forecasted traffic demands. Problem Statement The proposed Broadway Avenue roadway project includes access management, intersection and segment capacity, pedestrian facilities, and overall safety improvements for all users. At the Broadway interchange at I-35, a previous planning study was completed that determined the preferred interchange alternative. However, the County now needs an access management plan along Broadway Avenue to address the entire corridor. The goal of the project will be to develop and evaluate different access alternatives and select a preferred alternative based on a benefit cost analysis. Work will include: traffic counts, traffic forecasting, traffic operations analysis, intersection control evaluation, traffic detour planning, and a crash/safety analysis. This information will be used for documentation purposes in the final report and presentation. 2.8 XXXXXXXXXXXXXXXXXXXXXXXXXX ___________________________________________ Mentor: Tom Sohrweide, Principal Short Elliott Hendrickson Inc Butler Square Building, Suite 710C

100 North 6th Street Minneapolis, Minnesota 55403 Students: 2.9 LRT Mitchell Road Station ___________________________________________ Mentors: Randy Newton, PE, PTOE Assistant City Engineer | Traffic Engineer City of Eden Prairie 8080 Mitchell Road Eden Prairie, MN 55344 Office: (952) 949-8339 [email protected] Nick Erpelding, PE, PTOE Westwood Professional Services 7699 Anagram Drive Eden Prairie, MN 55344-7310 Direct Phone (952) 906-7444 Main phone: 952-937-5150 E-mail: [email protected] Students: Summary: 1) Collect / review data from existing park and ride sites to determine appropriate trip generation rates to be applied to the Mitchell Road Station and Park and Ride. 2) Provide a before and after trip generation comparison at Eaton and the Mitchell Road Station site. 3) Develop / review alternative access plans for accessing the station and park and ride. 4) Complete a preliminary traffic analysis of before and after conditions. 5) Document initial findings, initial recommendations, and suggested next steps. 2.10 Round-about design ___________________________________________ Mentor: Jeff Peltola Wenck Associates, Inc.


1800 Pioneer Creek Ctr., Maple Plain, MN 55359-0249 Office: (763) 479-4253 Cell: E-mail: [email protected] Students:

A large length of levee is required to be assessed for stability due to the

Projects 2.11 to 2.13 are old projects from spring 2010. The mentors have been contacted, but have not

indicated that they will offer a project. 2.11 Devils Lake Flood Risk Management Project, Lakewood Area Mentors: Lisa Buchli and Chanel Kass US Army Corps of Engineers 190 East 5th Street, Suite 401 St. Paul, MN 55101 Phone: (651) 290-5416 Fax: (651) 290-5805 E-mail: [email protected] E-mail: [email protected] Students: Jonathan Roberts [email protected] Matt Peterson [email protected] Ryan Drury [email protected] Kirk Carlson [email protected] Designated team leader: Jonathan Roberts

General Project Description The City of Devils Lake is located in northeast North Dakota, approximately 90 miles west of Grand Forks. Since 1867 the water surface elevation of Devils Lake has fluctuated between a minimum of 1400.9 feet above sea level

(asl) in 1940 to 1447.2 ft asl at the beginning of 2009. By the end of 2009, the lake had risen an additional four feet to a maximum elevation of 1450.2 feet, which is about 22.6 feet higher than the level recorded in February 1993. The flooding that began in the 1990s and continues to the present has inundated thousands of acres of farmland and destroyed hundreds of homes and businesses. Many roads have been closed and over 400 homes have been relocated. The City of Devils Lake currently has a project consisting of embankments that are holding back the waters of Devils Lake to

reduce the risk of flooding. These embankments, originally constructed in 1987, have been raised numerous times due to the continued rise of the lake. The Devils Lake Flood Risk Management Project (Devils Lake FRMP) continues the design and construction of structures throughout the city that will reduce the risk of further flood damage to the City of Devils Lake. Phase 3 of the Devils Lake FRMP is being done by a regional U.S. Army Corps of Engineers team, with the St. Paul District in charge of designing and preparing flood control plans and specifications for three small areas of the City of Devils Lake. Capstone Project Design A levee is being designed as part of Phase 3 of the FRMP that would protect the Lakewood area of the city from the rising water of Devils Lake. The capstone project will involve the design of interior flood control features for the Lakewood area. Interior flood control features are necessary to convey storm water from within the protected flood control area and can include gravity outlet structures, pumping stations, ponding areas, and interceptor ditches. The capstone project will require performing hydrologic and hydraulic analyses to determine the design of interior flood control features that will provide the appropriate level of protection to the Lakewood area. The hydrologic and hydraulic analyses require the use of the Hydrologic Engineering Center’s HEC-HMS and HEC-RAS software. Elevation data and mapping necessary to set up the models will be provided. 2.12 Tanana River Levee – Fairbanks, Alaska Mentor: Matt Redington, PE HDR Engineering Inc. 701 Xenia Ave South Minneapolis, MN 55416 Office: 763/591-5487 [email protected] Students: Andrew Dillon Susan Schlangen Seth Anderson Ken Ratrisavath

Engineering design services have been requested by the Alaska Railroad Corporation (ARRC) for developing a levee along the right bank of the Tanana River to mitigate for increases in water surface elevation due to the

planned construction of a rail bridge. The proposed levee and bridge site is located to the southeast of Fairbanks, Alaska. The levee is currently estimated to be 2.0 miles long. Riprap will be placed on the river side face and toe of the levee to protect against erosion and scour.


The proposed rail bridge is 3300 feet long and consists of 150-foot spans. The Tanana River is braided in this reach, and carries a heavy load of large woody debris in the form of mature white spruce and cottonwood logs. In addition to debris, the Tanana River regularly has ice jams in this reach, and there is the potential for ice to jam against the bridge piers, creating a backwater upstream until the jam flushes through. The amount of water surface elevation increases, due to the proposed rail bridge, will vary depending upon the bridge configuration and the effect of debris accumulation on bridge piers. The goal of this project will be to perform hydraulic modeling to determine water surface elevation increases, and design a levee for flood mitigation. HEC-RAS will be used to develop a hydraulic model of the Tanana River. Geopack and Microstation will be used to develop alternative levee alignments. Costs will be estimated for the alternative alignments. The final deliverable will be an Engineer's Report along with a presentation to the client.

Aerial View of the Tanana River and Tanana River – Right Bank

2.13 County Road 96 Corridor Design Mentor: Tom Fidler, PE

Bonestroo Direct: (651) 604-4810 Cell: (651) 324-5589 E-mail: [email protected]

Students: Kyle Renneke Nicklaus Ollrich Jason Meinke Zac Borgerding For several years, Ramsey County, the City of Arden Hills, Mn/DOT, and other agencies have been working to improve the existing traffic congestion and safety issues on Highway 96 and US Highway 10. The existing at-grade intersection where the two highways cross is one of the most congested intersections in the metro area and is the location of nearly 30 crashes each year. In addition to the existing concerns along Highway 96, the City of Arden Hills has been planning for the redevelopment of the former Twin Cities Army Ammunition Plant (TCAAP). The redevelopment could include nearly 2,200 housing units, producing a substantial increase in traffic on both Highway 96 and US 10. The existing congestion, annual traffic growth, and increase in traffic from the TCAAP redevelopment requires the


City and other agencies to work together to develop an overall plan for access, as well as implementing improvements to reduce congestion and crashes along the highways.

The concepts that have been developed have created some concern among residents in the area. The proximity of Arden Manor to the project site and the density of housing have made it difficult to develop a concept that minimizes impact to residents’ homes. Another significant concern is Round Lake, which is an impaired water body that contains hazardous runoff from the TCAAP site. The contaminants are located within the lake bed, where they pose less of a threat to the water and wildlife. Disturbance to the lake bed must be prevented to preserve the existing water quality. These two issues are in direct conflict with each other. In order to stay out of Round Lake, the widening will need to be to the north. It is very likely that the first row of homes in Arden Manor will be impacted. It will be necessary to closely review each of the key social, economic, and environmental issues to make informed decisions as development of the project concepts proceeds.

During the project development process, many concerns will need to be reviewed as part of the environmental review process. Some of these include: • Minimizing highway noise • Providing local access • Providing for safe access to local businesses southwest of

US 10 • Providing pedestrian/bicycle access along Highway 96 • Accommodating storm water drainage from the TCAAP

site to Round Lake • Preserving Arden Manor to the fullest extent possible • Limiting retaining walls along residential areas

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