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Portfolio
We publish contract values, durations, peak workforce and safety results because a portfolio where every project finished early and under budget is not a portfolio, it is a brochure. Two of the nine below were difficult. One is described in full, including what it cost us.
Across the nine projects on this page, 2019–2026.
Design-build, CMAR, design-bid-build and contract mining.
With one lost-time incident and four recordable injuries in total.
Seven of nine reached substantial completion at or ahead of contract date.
Filter the portfolio
Filter by market or delivery method. Each record below is a real contract of ours; details on any of them, references, final cost, lessons learned, are available to owners who ask.
Heavy Civil · Design-Build
Clear Creek County, Colorado
Widening and realignment of 3.4 miles of interstate through a geologically active mountain corridor, including two new structures over Clear Creek and a full interchange replacement.
Energy · Design-Bid-Build
Chelan County, Washington
Civil, hydraulic and electrical balance-of-plant for a 380 MW pumped storage facility, delivered inside a 42-month energisation window.
Mining · Contract Mining
Campbell County, Wyoming
Ongoing overburden removal and coal delivery under a five-year term contract, moving approximately 46 million bank cubic yards per year.
Government · CMAR
Maricopa County, Arizona
A 24 million gallon per day advanced water reclamation facility providing recharge supply and drought resilience for a 520,000-person service area.
Government · Design-Build
Oklahoma City, Oklahoma
Full modernization of a 1960s-era maintenance hangar into a high-bay aircraft sustainment facility, executed adjacent to active flight-line operations.
Mining · Design-Build
Antofagasta Region, Chile
Concentrator throughput expansion from 78,000 to 120,000 tonnes per day, including new grinding circuit and flotation bank, at 3,100 metres elevation.
Energy · Design-Bid-Build
Lewis County, Washington
Rebuild of 41 route miles of ageing 230 kV wood-pole line to steel monopole construction, delivered entirely under planned outage windows.
Industrial · Design-Build
Louisville, Kentucky
Greenfield 42-acre multimodal bulk terminal with barge unloading, rail loop and 180,000 tonnes of covered storage.
Government · Design-Bid-Build
Doña Ana County, New Mexico
Rehabilitation of 14.2 miles of levee to FEMA and USACE 100-year flood protection standards, including slurry cutoff wall and habitat restoration.
We have likely still done the work, the filter is limited to nine records. Call the switchboard on (303) 555-0142 or email bids@ironwoodgroups.com and we will send references for the market and delivery method you are interested in.
Case studies
Scope, delivery approach and outcome for each project. Where a project ran into trouble, that is in here too.
Heavy Civil · Design-Build · 2022 – 2026
Widening and realignment of 3.4 miles of interstate through a geologically active mountain corridor, including two new structures over Clear Creek and a full interchange replacement.
Owner: Colorado Department of Transportation
Location: Clear Creek County, Colorado
Contract value: $214M
Energy · Design-Bid-Build · 2021 – 2025
Civil, hydraulic and electrical balance-of-plant for a 380 MW pumped storage facility, delivered inside a 42-month energisation window.
Owner: Cascade Power Authority
Location: Chelan County, Washington
Contract value: $388M
Mining · Contract Mining · 2019 – present
Ongoing overburden removal and coal delivery under a five-year term contract, moving approximately 46 million bank cubic yards per year.
Owner: Thunder Basin Resources LLC
Location: Campbell County, Wyoming
Contract value: $172M
Government · CMAR · 2023 – 2026
A 24 million gallon per day advanced water reclamation facility providing recharge supply and drought resilience for a 520,000-person service area.
Owner: City of Mesa & U.S. Bureau of Reclamation
Location: Maricopa County, Arizona
Contract value: $94M
Government · Design-Build · 2022 – 2024
Full modernization of a 1960s-era maintenance hangar into a high-bay aircraft sustainment facility, executed adjacent to active flight-line operations.
Owner: U.S. Army Corps of Engineers, Tulsa District
Location: Oklahoma City, Oklahoma
Contract value: $67M
Mining · Design-Build · 2020 – 2024
Concentrator throughput expansion from 78,000 to 120,000 tonnes per day, including new grinding circuit and flotation bank, at 3,100 metres elevation.
Owner: Andean Copper Joint Venture
Location: Antofagasta Region, Chile
Contract value: $245M
Energy · Design-Bid-Build · 2023 – 2025
Rebuild of 41 route miles of ageing 230 kV wood-pole line to steel monopole construction, delivered entirely under planned outage windows.
Owner: Cascade Power Authority
Location: Lewis County, Washington
Contract value: $58M
Industrial · Design-Build · 2021 – 2024
Greenfield 42-acre multimodal bulk terminal with barge unloading, rail loop and 180,000 tonnes of covered storage.
Owner: Ohio River Terminals Group
Location: Louisville, Kentucky
Contract value: $121M
Government · Design-Bid-Build · 2023 – 2025
Rehabilitation of 14.2 miles of levee to FEMA and USACE 100-year flood protection standards, including slurry cutoff wall and habitat restoration.
Owner: U.S. Army Corps of Engineers, Albuquerque District
Location: Doña Ana County, New Mexico
Contract value: $43M
Difficult projects
Two projects in the portfolio above did not go to plan. One is the 2017 water reclamation package we have already discussed elsewhere on this site. The other is below, a project where the ground was not what the geotechnical report said it was, and where the schedule consequence landed on us.
What happened. The contract documents indicated continuous lean clay over the full 14.2-mile reach. At mile 6.4 we encountered a 900-foot lens of loose saturated sand underlying the levee prism. The specified method, excavate and recompact in place, could not produce a stable embankment, so the design required a soil-cement-bentonite cutoff wall that was not in the bid.
What it cost. 26 weeks of extra programme and $5.8M of additional cost. As a design-bid-build contract with a differing-site-conditions clause and pre-bid geotechnical data relied upon in our bid, we recovered $4.9M of that through the modification process. We carried the balance.
What changed. We now commission our own geotechnical investigation, our own boreholes, our own geologist, our own risk register, on every levee, dam and channel project we price, regardless of what the owner provides. It costs roughly 0.3% of contract value and we will not bid flood control work without it.
References
Every owner below has agreed to be contacted directly about our performance. We will provide names, telephone numbers and email addresses on request.
Heavy Civil
I-70 Floyd Hill Segment 3 · $214M · progressive design-build · 2022–2026
Energy
Cascade Ridge pumped storage and Denali 230 kV rebuild · $446M combined · 2021–2025
Government
Tulsa and Albuquerque Districts · hangar modernisation and levee restoration · $110M combined
Mining
Bighorn Basin pre-strip and contract mining · $172M term contract · 2019–present
Industrial
Bluegrass rail and bulk terminal · $121M · design-build · 2021–2024
International
Antofagasta concentrator expansion · $245M · design-build · 2020–2024
Next step
Call the switchboard and our automated receptionist will take the details, book a call-back with the right estimator, or put you straight through to dispatch. It answers in under two seconds, day or night.
