Dan Vroom Ryan LaReau David Westlund Eric Eylander

Team Bridge

Project Selection

• Structural Engineering• Hydraulic Engineering• Local Flavor• Multiple Interested Parties• Possibility of Implemenation

Project Location

Image courtesy of Bing Maps

Project Location

Image courtesy of Bing Maps

Project Definition

The primary goal is conveyance. This crossing must be:

1. Safe

2. Economical

3. Attractive

Design Considerations

• Trust– Safety– Accountability

• Caring– Wheelchair accessibility– ADA compliance– Environmental impact

Little Heron Ct.

Location #1• 165 ft. span, 10 ft. elevation difference.• Too expensive

Location #2• Bank to Bank, 100 ft.

Little Heron Ct.

Final Location• 65 ft. span, 8 ft. wide.• Steel structure covered in wood.

Little Heron Ct

Bridge Alternative

• Determining Loads– Live Load: 148.85 psf • Motorized Wheelchair and Passenger

– Snow Load: 40 psf– Dead Load: 10 psf + 38.17 plf (Line Load)

RAM Modeling

Beam Design Summary

No. Item Unit Quantity

1 W8x10 LF 329

2 W12x19 LF 39

3 W12x35 LF 19.5

4 W10x33 LF 27

5 W24x68 LF 91

6 W24x76 LF 45.5

Bridge Profile

Bridge Cross-Section

Bridge Model

Culvert Alternative

The culvert design is at the same location as the bridge. The reasons for designing it are:

• Providing an alternative to the bridge• Comparing costs of more than one solution• Expanding the scope of the project to ensure

it best suits the needs of the clientele

Culvert DesignApril 6 storm event: Approximate 20 year, 2 hr. storm

Peak Discharge

• Drainage area is 148.3 acres.• SCS Method insists on 25 year return period.• Rainfall depth is 4.45 inches for 25-yr storm• Peak discharge:– 2-Yr Storm: 102 cubic feet per second– 25-Yr Storm: 276 cubic feet per second– 100-Yr Storm: 426 cubic feet per second

Culvert Design

HEC-RASMDNRE requirements – 100 Yr Storm impactTwo box culverts– 12’ x 6’ at channel bottom– 6’ x 3’ on floodplain

Culvert Model

Path Design

The paths must be ADA compliant. This means the design must have:

• The shallowest slope feasible• No steeper than a 1:12 slope• Landings that are 60” clear every 30” of rise or

40’ run (and 5’x 5’ for changes in direction)• Railings

Path Design

• 6’ wide• Minimize tree removal• Possible expansion of landings for benches• Retaining structures• 1% slope across the path to allow for storm

water runoff

Path Design

Path Design

North Path Design

Path Design

Part of South Path Design

Little Heron Court

South End of Bridge

Path Design

Part of South Path Design

Path Design

Crossing Through Parking Lot to Ministry Center Entrance

Cost Estimates

• Bridge--$56,863.23

• Culvert--$18,000

• Path (with railings, fill, and retaining

structures)--$6,908.62

Conclusion

• Met our design goals

• Learned importance of project management

• Gained experience with real world design

Future Work

• Woodlawn CRC• Calvin Physical Plant• ASCE Meeting• Holland Home

Acknowledgements• Professor J. Aubrey Sykes for proposing the project and remaining as a

contact from Woodlawn Christian Reformed Church. • Professor Leonard De Rooy for advising the team throughout the process.• Professor Robert Hoeksema for help in preliminary hydraulic analysis• Mr. Roger Lamer for aiding the team as the industrial consultant.• Mr. Phil Beezhold for acting as the team’s contact from Calvin College’s

Physical Plant.• Mr. Scott Hull for being the project’s contact from the Holland Home

and Raybrook Estates.• Mr. Brad Boomstra from the Kent County Drain Commissioners Office for

providing pertinent information about Whisky Creek.• Bridge Specialist Mark Becker from EXCEL Bridge Manufacturing Co. for

providing professional advice regarding bridge design considerations.

Questions