Project Name:

Marina Basin at Cooper Jack

Client:

Cardita Limited

Delivery Methodology:

Project Overview:

The project scope included the excavation of a 12 acre marina basin to a general depth of  10 feet below mean sea level. In order to form the basin Johnston international excavated a total of 250,000 cubic yards of lime stone rock and installed 2200 linear feet of pre-cast concrete dock wall and bulkhead. The 600 linear foot marine approach channel was cut using a cutter suction barge.

Challenges: 

The project required the excavation of 250,000 cubic yards of limestone under water and a 600 linear foot dredge into the sea using a cutter suction barge. All works within the marine aproach channel were controlled with turbidity curtains and stringently monitored to ensure turbidity was maintained within the designated guidelines. 

Contract Value:

US $2.6m.

Construction Schedule:

Mobilization date, 28 March 2002. Contract Period 10 Months. The contract was completed on schedule.

Estimate Methodology:

Competitive tender.

Package Strategy:

The main excavation works were subcontracted to a specialist trade contractor from the US with whom Johnston have a ten year relationship.