Graniterock Builds Protective Underground Water Freeway

Graniterock is constructing an underground water freeway in Morgan Hill to protect the community from floods. The $129 million project includes widening Llagas Creek and building a massive box culvert. Over 1,000 homes, 500 businesses and agricultural land will benefit. The complex construction involves heavy equipment and high coordination....

Nov 25, 2025 - 16:40

Graniterock is constructing an underground water freeway in Morgan Hill to protect the community from floods. The $129 million project includes widening Llagas Creek and building a massive box culvert. Over 1,000 homes, 500 businesses and agricultural land will benefit. The complex construction involves heavy equipment and high coordination....