Home » River Issues » Stormwater » China Gulch culvert replacement: Pre-construction investigation begins

China Gulch culvert replacement: Pre-construction investigation begins

The China Gulch culvert under Highway 1 at the intersection of Old State Highway in Gualala is failing, causing a sinkhole to form at the intersection, and so it needs to be replaced promptly. CalTrans has approved $9.9M for emergency repair, and hopes to complete repairs by the end of November, 2025.

For more information, see: Sinkholes and Salmon

May 13, 2025 Drilling rig begins sub-surface investigations on west side of Highway 1
May 14 Drilling rig sub-surface investigations on the east side of Highway 1
May 15 Construction crew begins clearing path down to China Gulch culvert intake
Clearing a path through impenetrable brush
Digging their way down the slope into China Gulch
Down, down, down . . .
Looking downslope into China Gulch
China Gulch
China Gulch culvert intake
There’s light at the end of the tunnel.