Test air leakage rate: With a fully-charged air system (typically 125 psi), turn off the engine, release the service brake, and time the air pressure drop. The loss rate should be less than 2 psi in 1 minute for single vehicles and less than 3 psi in 1 minute for combination vehicles.
Construction on the Coronado Bridge began in 1967. Almost 500 prestressed concrete piles were fastened to the sea floor of the bay to provide the foundations for the bridge. The steel and concrete components were largely built offsite, then assembled together from marine construction barges over the bay.
TheHawk's Nest. About four miles from Port Jervis, the Hawk's Nest section of New York Route 97 has been frequently used in television commercials and advertisements. A 30 minute drive from Port Jervis along this scenic road will lead to the oldest wire suspension bridge in the United States. Called The Delaware Aqueduct when built in 1847, it was designed by John A. Roebling, future engineer of the famous Brooklyn Bridge in New York City.