Trinidad Dam – Upstream Embankment Riprap Replacement

A logistically complex embankment stabilization project was completed ahead of schedule through precise planning and strict water-level coordination.

Client(s): USACE Albuquerque District

Sector: Infrastructure

Location: Trinidad, CO

Status: Completed 2019

Delivery Method: Firm-Fixed-Price (Lump Sum)

Sky Blue Builders completed the upstream embankment riprap replacement at Trinidad Dam, placing approximately 9,100 tons of riprap along the shoreline of Trinidad Lake. The work supported long-term dam stability and required execution within a narrow operational window dictated by lake levels and seasonal constraints. 

Due to limited shoreline access, the team developed a marine-based construction approach utilizing floating barges, a long-reach excavator, and front-end loaders to place material directly along the embankment. Multiple sectional barges were deployed to support material laydown and equipment operations while maintaining flotation capacity under heavy loads. 

Water elevation management was a critical driver of sequencing and scheduling. Construction was strategically performed during winter months when lake levels allowed access to the work areas, requiring detailed coordination to balance safe barge operations with placement tolerances. Extensive preplanning addressed haul routes, riprap stockpile locations, and barge logistics to maintain continuous production. 

Temporary haul roads were constructed and maintained with controlled slopes, including crossings over creeks and drainage channels to prevent upstream or downstream impacts. Through disciplined CPM scheduling, proactive logistics planning, and close coordination with subcontractor partners, Sky Blue Builders completed the project approximately one month ahead of schedule despite challenging environmental and access constraints.