Sequence of Events
The pilot circled the runway upon arrival at the private airstrip and assessed it as suitable for landing. Touchdown occurred 400 feet down the runway. Initial deceleration was normal, achieved through braking and aerodynamic braking. However, deceleration subsequently slowed and groundspeed increased. The pilot confirmed that the throttles were at idle and the aircraft configuration was appropriate. The aircraft then traveled off the end of the runway, making contact with a post and a ditch. It continued over a two-lane highway and came to rest in a second ditch. The impact caused the nose gear to shear off.
Airstrip Information
The pilot had been originally informed that the airstrip was 3,000 feet long, but its actual length was 2,250 feet. The grass surface was wet from morning dew. An aborted landing was not performed due to the presence of power lines at the end of the runway. Additionally, a 5-knot tailwind was present.