Kitsap - Sunnyslope MP 0.3 culvert clus
Project Number: 1825-01
From milepost 0.3 to milepost 0.35
RATA Funds: $1,095,300
Legislative District: 26
Status: PE and Design
Date Approved: 2025
This project should be a DR (not 3R) - but Classic RAP has not been set up to allow DR in NW region. All other contract details remain true.
After yet another rainstorm during December of 2023 a culvert under Sunnyslope Road washed out. Kitsap County is replacing that with our own funds, but while we have the road closed we identified another culvert cluster ½ mile southeast that also needs to be replaced immediately due to rapid corrosion caused by the high concentration of tannins in the stream. The bottom of the metal culverts is rusted away and the road above has been patched a few times due to buckling. We are replacing those three culverts with a temporary structure at MP 0.3 with our own funds. The requested RAP funding will allow Kitsap County to replace the temporary structure with a permanent solution: an appropriately-sized concreted box culvert in a better location approx. 250' feet north, in a timely manner. The new position will return the streamflow to it’s natural position in the valley.
This area of Kitsap County was sharply striated by receding glaciers at the end of the last ice age, leaving parallel valleys and ridges that run from southwest to northeast. Sunnyslope Road is one of only a few ways to move in an east-west manner; to get from one end of the road closure to the other requires a 10-mile detour. When one of these other routes is closed due to an accident or downed tree (such as when a tree fell and blocked every lane of State Route 3 just before evening commute on June 3rd) the extremely limited alternate routes become severely congested adding over an hour to trips.
After yet another rainstorm during December of 2023 a culvert under Sunnyslope Road washed out. Kitsap County is replacing that with our own funds, but while we have the road closed we identified another culvert cluster ½ mile southeast that also needs to be replaced immediately due to rapid corrosion caused by the high concentration of tannins in the stream. The bottom of the metal culverts is rusted away and the road above has been patched a few times due to buckling. We are replacing those three culverts with a temporary structure at MP 0.3 with our own funds. The requested RAP funding will allow Kitsap County to replace the temporary structure with a permanent solution: an appropriately-sized concreted box culvert in a better location approx. 250' feet north, in a timely manner. The new position will return the streamflow to it’s natural position in the valley.
This area of Kitsap County was sharply striated by receding glaciers at the end of the last ice age, leaving parallel valleys and ridges that run from southwest to northeast. Sunnyslope Road is one of only a few ways to move in an east-west manner; to get from one end of the road closure to the other requires a 10-mile detour. When one of these other routes is closed due to an accident or downed tree (such as when a tree fell and blocked every lane of State Route 3 just before evening commute on June 3rd) the extremely limited alternate routes become severely congested adding over an hour to trips.