Over the next several months, travelers in Southwest Washington who use Highway 14 through the Gorge should plan ahead for delays east of Washougal.  Starting Wednesday, Washington State Department of Transportation contractor crews will begin work to replace an existing damaged debris flow fence located along SR 14 between mileposts 25 and 26 near Cape Horn in Skamania County.  The highway through the work zone will be limited to one lane with flaggers from 7 a.m. to 5 p.m. Mondays through Thursdays, with delays of up to 20 minutes.  The transportation department says construction activity on Fridays and Saturdays may be needed.  Any work occurring on those two days will take place along the westbound shoulder of SR 14 from 7 a.m. – 5 p.m.  In observance of the Labor Day holiday, no work will be performed between Sunday, Sept. 3 and Tuesday, Sept. 5.  During rockfall activity, the debris fence helps contain rocks and debris by holding it between the fence and the slope, reducing the number of rocks and debris that fall onto the road and into the travel lanes of the highway, which improves safety and reduces emergency road closures.