This page contains a Flash digital edition of a book.
ansion: Convenient and Economical

Parking Study For a better understanding of EppleyAirfield’s overall park-

ing needs, as well as the opportunities afforded to the airport by the area’s economic growth, consultants analyzed the relationship between parking demand and enplanement statistics to ensure that customers were receiving optimal service. For coordinated planning, the parking and the airside terminal study were con- ducted simultaneously. By reviewing current parking/rental car data and the oper-

ating conditions of the airport parking system, key parking parameters were identified to benchmark: parking revenue per parker, parking revenue per enplanement, and parking demand ratio per 1,000 enplanements. Rental car facilities housed with- in a parking structure contribute approximately 25% to total parking revenue. Recognizing that a parking structure expansionwould have

to allow for consolidation and expansion of current terminal facilities without duplication, several parking structure options were studied, including multiple plan locations, building heights, construction phasing, building materials, amenities, code implications, cost estimates and schedules. Once all of the data had been accumulated, the airport

authority’s review of the findings confirmed project directives. A plan of action to pursue a parking structure addition moved froma planning concept to a credible business proposal andwas submitted for review by the authority’s Board of Directors. Twelve expansion concepts were presented for airport staff

consideration with the following evaluation criteria: • Impact on roadway traffic flow (long range) • Impact on airport landside operations • Project aesthetics • Convenience – vehicle flow to / fromnew parking • Convenience – pedestrian flow to / fromnew parking • Constructability • Disruption to parking / rental car operations • Parking cost / added parking space

Parking Structure Expansion The final approved expansion concept provided the largest

parking area build-out possible within the existing site parame- ters.As the airport authority did not want the parking expansion to include remote facilities, two horizontal cast-in-place post-ten- sioned concrete additions, each six stories in height, served to increase parking space. Existing pedestrian vertical circulation elements and two pedestrian bridges from level three to the ter- minal remained in place. Construction forced the closing of the previous entry

points for all patrons using long-term garage and short-term parking. Temporary entry locations, using newly purchased entry equipment, provided patron ingress fromTerminal Drive. The parking structure continued to operate during all phases of the construction. Contract documents were prepared to define construction

activity phases, limits and schedules. Construction fencing and plastic enclosureswere designed to ensure safe and effective con- struction activity and public way separation. The construction contract included liquidated damages that coordinated with the project phases.

Cost and Features The structure additions, totaling approximately 250,000

square feet, were completed for a construction cost of $9.5 mil- lion, or $13,176 per parking stall, and were in line with the origi- nal cost estimate.TheGeneralContractorwasGrahamConstruc- tion of Omaha.

Construction features worth noting include: • Deep pile foundations: 70’ - 90’ tipped steel pipe. •New construction cantilevered 14’ toward existing structure.

• CIP post-tensioned construction. • 6” slabs with 24’x60’ structural grid. • Façade constructed of unitized concrete-filled steel pans.

The construction effort was completed in 14 months and

allowed for continuous parking operations, with no more than 150 stalls displaced at any given time. The 721-stall parking expansion accommodated the airside consultants’ post-9/11 re- evaluation of expansion alternatives. Overall, the Omaha Airport Authority’s desire to provide

additional convenient parking for patrons, to improve upon the parking system performance, and to respect the long-term land- side expansion opportunities, was successfully achieved.

Scott R. Froemming, P.E., Director of Operations in the Minneapolis office of Walker Parking Consultants, can be reached at

PT APRIL 2010 • PARKING TODAY • 15 Eppley Airfield’s garage expansion features incremental

parking system improvements; relocation of the entry parking equipment out of public viewand into awell-lighted, secure, cov- ered location; and improved vertical vehicular circulation through the modification of the long-term parker flow directly onto a one-way express ramp. In an effort to enhance public safe- ty, the short-termentry drive alsowas relocated to a spot next to a pedestrian pathway leading to the terminal.

Page 1  |  Page 2  |  Page 3  |  Page 4  |  Page 5  |  Page 6  |  Page 7  |  Page 8  |  Page 9  |  Page 10  |  Page 11  |  Page 12  |  Page 13  |  Page 14  |  Page 15  |  Page 16  |  Page 17  |  Page 18  |  Page 19  |  Page 20  |  Page 21  |  Page 22  |  Page 23  |  Page 24  |  Page 25  |  Page 26  |  Page 27  |  Page 28  |  Page 29  |  Page 30  |  Page 31  |  Page 32  |  Page 33  |  Page 34  |  Page 35  |  Page 36  |  Page 37  |  Page 38  |  Page 39  |  Page 40  |  Page 41  |  Page 42  |  Page 43  |  Page 44  |  Page 45  |  Page 46  |  Page 47  |  Page 48  |  Page 49  |  Page 50  |  Page 51  |  Page 52  |  Page 53  |  Page 54  |  Page 55  |  Page 56  |  Page 57  |  Page 58  |  Page 59  |  Page 60  |  Page 61  |  Page 62  |  Page 63  |  Page 64