The Maui News - Maui County is moving ahead with a $1.65 million project to replace a culvert at Waiakoa Gulch and to repair an undermined section of South Kihei Road.
Drainage pipes that run under the road near the Ma'alaea Surf and Kihei Beach resorts at Sugar Beach are not big enough to handle the high volume of floodwaters that sometimes rolls through the Waiakoa Gulch when heavy rains strike Haleakala.
"Long-term erosion, flooding and overtopping of the culverts from rain events have undermined the upslope shoulder of Waiakoa Gulch culverts at South Kihei Road," a project description says. "The drainage channel on the downstream side of South Kihei Road is usually blocked at the outlet by accumulated sand, which temporarily prevents discharge of stormwater to the ocean. During heavy storms, these circumstances contribute to the stormwater runoff overtopping South Kihei Road, often closing the roadway until the flooding subsides or the drainage channel is open."
The project's aim is to "repair the critical condition of the deteriorating culverts and road bed."