Installation of a new field turf surface at Hood River Valley High School’s Henderson Stadium is set to begin Thursday, and school officials are asking for the public’s cooperation to ensure the project can be completed without delay.  HRV athletic director Trent Kroll says people are asked to stay off the turf on the field once they begin installation, as spikes holding the turf down and stretched material that are disturbed may delay completion.  People are also asked to stay out of the fenced off parking lot area until construction is done, and to stay off the track until that portion of the project is completed, as a need to clean asphalt could delay progress.  Kroll says the field project is still on track to allow the stadium to reopen in time for a home football game on October 5.