Grant Line Road Roundabouts Project

The City of Mountain House is advancing the Grant Line Road Roundabouts Project to construct two roundabouts at the intersections of West Grant Line Road with Altamont Pass Road and West Grant Line Road with Mountain House Road in California, ZIP 95391. The primary objective is to reduce existing congestion and delays at these intersections by improving traffic flow, with no design consideration for future traffic growth. Both roundabouts require additional right-of-way acquisition due to insufficient existing space, and final approvals must be secured from both the City of Mountain House and Alameda County. The project is classified as a forecasted procurement under NAICS code 237310, though no contract value, pricing structure, or formal solicitation number has been published. The point of contact for the project is Harold Holland, Design/Build Consultant, reachable via email and phone, with secondary support from Charlie Simpson of Basecamp Environmental. The project’s execution is subject to extensive environmental and biological compliance requirements under CEQA, the Endangered Species Act, and related state and federal regulations. All construction activities must adhere to strict mitigation measures to protect federally and state-listed species including the California tiger salamander and California red-legged frog. Work is prohibited during sensitive biological periods from October 15 to May 1 and must cease during rain events exceeding 0.25 inch within 24 hours or within 48 hours after such events. Pre-construction surveys must be completed within 24 hours of ground-disturbing activity, and barrier fencing must be installed and removed within 72 hours of work completion. Natural erosion control materials only are permitted; synthetic netting is banned to prevent wildlife entrapment. Excavations deeper than 12 inches require daily inspections, covers, or ramps for animal escape, and any incident involving injury or death of protected species triggers immediate work stoppage and mandatory reporting to USFWS and CDFW. Additionally, a state-approved Traffic Control Plan must be implemented with coordination involving local emergency services and residents. Habitat restoration must restore disturbed areas with native vegetation, and off-site mitigation credits at a 3:1 ratio are required for permanent habitat loss. Permit compliance with ACOE, CDFW, and RWQCB is mandatory prior to any wetland or watercourse disturbance, and surveys for Swainson’s hawks must occur if work is conducted between March 1 and September 15. No formal FAR clauses, payment instructions, inspection checklists, or procurement evaluation factors are documented