Corman Kokosing
Construction Company
Cross County
Connector Trail
By Patrick Lunczynski, Corman Kokosing Construction Company
For the Cross County Connector Trail project, crews at
Corman Kokosing Construction Company constructed
a 10-foot wide trail for approximately 1.2 miles in a protected
wetland. The foundation consisted of a 4,439 LF elevated
timber boardwalk, 40,000 feet of pile driving, at-grade pavement,
guardrail, street signage, site drainage, utility relocations and erosion
and sediment controls.
Corman used a Link-Belt 218HSL crane outfitted with a GPE D8
diesel impact hammer and a Link-Belt Grove RT 880E crane outfitted
with an APE D8 diesel impact hammer to drive approximately
900 12-inch timber piles, each 40 to 45-feet long, the elevated
boardwalk. Test piles were performed every 500 feet. The timber
piles were pressure-treated southern yellow pine, manufactured in
accordance with ASTM D-25 for round piles. Corman ordered 40
to 45-foot long timber piles based on boring logs prior to the test
pile to save time and money. In most cases, the pile cutoffs were
approximately five feet long.
The completed structure extends from Kent Island into
Grasonville, Md., connects to the Cross Island Trail and is the
first link to start connecting with the rest of Maryland’s Queen
Anne’s County.
Since the project was in a protected wetland and geotechnical
conditions consisted of brackish water, timber piles were the most
compatible solution for a timber boardwalk as they had a 2.5#CCA
treatment best suited for the marine-like environment.
A crew installing headers and stringers working to keep up the
pace with pile driving crew
Two cranes meeting to
complete the pile driving.
Photos courtesy of Corman Kokosing Construction Company
64 | ISSUE 3 2020 www.piledrivers.org
/www.piledrivers.org
