Underground Construction - December 2019 - 14
Stormwater Drainage for One of
the World's Best Playgrounds
The Gathering Place is a $400 million project in Tulsa created by
the George Kaiser Family Foundation that transformed Tulsa's
iconic waterfront along the scenic Arkansas River into a dynamic,
interactive environment. Named by National Geographic as one of
the top 12 playgrounds, it is the largest private/public park in the
world, and the number one Tulsa attraction.
In 2014, Gathering Place broke ground, and the first guests
entered on Sept. 8, 2018. Five acres of the current 66-acre site
include playgrounds with 160 activities along with zip lines,
suspension bridges, sculptures plus natural hills, meadows and
paths. A skateboard park and basketball courts give teenagers and
young adults abundant opportunities to enjoy the public space and
the riverfront environment.
Built on the edge of the Arkansas River, the area is prone to
flooding when the river rises and also from typical rain storms.
This was due mainly to the undersized pipelines along with any
runoff from roads and highways that would also flow onto the
Blair Mansion property where the Gathering Place is now situated.
The city of Tulsa funded $41 million of critical infrastructure
improvements near the site before work could commence. While
the land is owned by the George Kaiser Family Foundation,
the utilities including the stormwater system are owned and
maintained by the city of Tulsa.
14
DECEMBER 2019 | UConOnline.com
For the Gathering Place's underground stormwater system,
more than four miles of pipe was called for along with 750 domed
chambers that would control and slow the flow of the stormwater
into the Arkansas River.
"Originally, reinforced concrete pipe (RCP) was specified but
changed to thermoplastic pipe due to substantial cost savings and
its ability to be rapidly installed," explained Ron Egge, engineer,
Sherwood Construction Company of Tulsa. "One of the hurdles we
had was that this job was a Privately Funded, Public Improvement
- PFPI - project with the city of Tulsa. The city didn't allow plastic
pipe at the time; however, they did allow it on this job after we got
going. This change saved the owner a lot of money plus made it
possible to do the installation a lot faster."
Long life cycle
Designed for a 100-year storm event, the stormwater system used
15,000 feet of ADS HP Storm polypropylene pipe in diameters
from 12 to 24 inches, 8,000 feet of N-12 high-density polyethylene
(HDPE) pipe plus Nyloplast Water Control Structures. To detain and
slow the outflow of stormwater runoff, two containment systems
using 750 MC-3500 StormTech chambers were constructed, one
under each parking lot. Total retention beds with water quality units
were installed in the sandy soil to recharge the groundwater onsite.
http://www.UConOnline.com
Underground Construction - December 2019
Table of Contents for the Digital Edition of Underground Construction - December 2019
Contents
Underground Construction - December 2019 - FC
Underground Construction - December 2019 - IFC
Underground Construction - December 2019 - Contents
Underground Construction - December 2019 - 4
Underground Construction - December 2019 - 5
Underground Construction - December 2019 - 6
Underground Construction - December 2019 - 7
Underground Construction - December 2019 - 8
Underground Construction - December 2019 - 9
Underground Construction - December 2019 - 10
Underground Construction - December 2019 - 11
Underground Construction - December 2019 - 12
Underground Construction - December 2019 - 13
Underground Construction - December 2019 - 14
Underground Construction - December 2019 - 15
Underground Construction - December 2019 - 16
Underground Construction - December 2019 - 17
Underground Construction - December 2019 - 18
Underground Construction - December 2019 - 19
Underground Construction - December 2019 - 20
Underground Construction - December 2019 - 21
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Underground Construction - December 2019 - IBC
Underground Construction - December 2019 - BC
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