Huron Cooling Tower Replacement

General Service Administration (GSA), Huron SD

A Design-Build project using a 210-ton crane lifting new cooling towers onto the roof of the Federal Building in Huron, SD. A highly technical project requiring incredible coordination with HDI’s customer(s) from start to finish.  HDI had the in-house experience and a bevy of talented subcontractors to make this happen in minimal time, meeting/exceeding all of the customer’s expectations.  The process included draining the existing system, demolishing the existing cooling tower to include piping, pumps, electrical connections and accessories.  Once completed, during challenging weather conditions HDI lifted, installed and connected two new cooling towers. Consisting of connecting new pumps, electrical reconnects, new chemical system, automated monitoring controls (BAS) system and finally passing the start-up & commissioning flawlessly.

Feed Mill Repairs, Phase 1

United states department of agriculture (USDA), Miles City, MT

HDI designed and accomplished the new construction of the feed mill conveying system on time with minimal changes after construction started.  The new concrete foundation, site work, electrical, lighting protection system, replacement of grain bin controls and electrical power brought the mill conveying system up to current standards and will be productive for long into the future.  The USDA worked closely with HDI throughout the design process until the project completion making this a great success story for the USDA and HDI.

Aspen Airport Traffic Control Tower Roof Replacement

Federal Aviation Administration (Faa), aSPEN, co

An FAA roofing repairs project which included complete repair/sealing of damaged surfaces to the roof membrane.  The damaged surface repair included; repair & reseal damaged flashing, sealing around all windows and metal inserts, new roof drains, and repairing/ resealing moisture intrusion areas for approximately 4,500 sf.

Emergency Vault Repairs

United states department of agriculture, national forest service, colorado state univercity campus, fort collins, co

Project included replacing a 10-ton refrigeration system, compressors, air-cooled condensing units, and evaporators for the USDA Seed Vault to include replacing electrical buckets supporting the demand for the new mechanical equipment. This replacement was considered a national emergency, as these refrigerated seed vaults housed hundreds of thousands of rare seeds for the USDA. Because of this, the entire demolition and replacement of equipment had to be accomplished without taking the existing cooling system offline.  Our people had to wear parkas and restrict time in the freezer to 15 minutes in order to prevent injury.  HDI removed and reclaimed existing refrigerant from the existing chillers to use with the new system. In order to replace the condensing units, HDI used a rigging crane replacing existing condensers one at a time allowing the system stay operational.

Storm Water Basin Repair

center for disease control and prevention, Colorado state univercity campus, Fort Collins, CO

A Design-Build Project that incorporated repairing a water drainage basin eliminating high volumes of seasonal water eroding dirt and distributing silt and mud onto Colorado State University’s (CSU’s) lakeside property. Two steel-reinforced 22’x8’x8” drop wall structures (with footings) were excavated and poured in place.  The structures acted as check damns for seasonal storm surges. During the excavation, proper sloping and benching were used in strict accordance with OSHA guidelines.  Class-B filter material and rip rap was used on the drainage flowline , with a 9 foot 3/1 sloped sidewalls. A center section (approximately 20’ long parallel with the flowline) was compacted, seeded, and blanketed with Turf Reinforcement Mat (TRM) encouraging natural vegetation and limit erosion. Rip rap was used to match existing landscape boulders.  Existing concrete flared end sections and drainage pipe were cleaned of silt/debris which were discharging water onto CSU property.  Hydro mulching was used to reclaim native grasses.

Fraser Lexan Weir Rehab

United states dapartment of agriculture, national forest service, Fraser, CO

Remote project involving the repairing of collapsed sidewalls and recorder hut of a research weir, included the demolition of the existing upper and lower weir walls.  After demolition, over excavating was done on the tilling pond with new corrugated hydrostatic piping. HDI placed a new clay liner in the tilling pond while grading/landscaping the surround grounds.

Raymond Façade Replacement

General Service Administration (GSA), Raymond, MT

Renovation of a 5,000 SF Customs and Border Patrol two-story facility owned by the GSA.  Using Building Information Modeling (BIM), HDI removed three sides of the exterior walls, adding steel, new panels, repairing damp proofing to the foundation, roofing, landscaping, drywall, finned tubes, architectural and mechanical louvers, insulated metal panel exterior, low E windows, electrical upgrades, blinds throughout, and specialized envelope testing.

A challenge HDI overcame during the construction was the remote location, wind and extreme temperatures variances. HDI’s ability to preplan and coordinate these variables into the construction plan brought the facility on time and in budget. 

Bennet Switchgear Replacement

General Services Administration (GSA), Salt Lake City, UT

Project included the replacing of existing switchgear with new upgraded switchgear in the eight-story Bennett Federal Building complex housing several government agencies and two U.S. Senators.  Constant coordination between HDI and the GSA was critical due to the sensitivity and level of clearances in facility.  

The preplanning and coordination between HDI, GSA and building management started early on in the process to ensure the power outage would not interrupt building services during normal working hours. Two 3-day weekends were agreed upon for the scheduled work, with the first weekend for the main-tie-main switchgear at the utility connection and the second weekend selected for the secondary A-B switchgear.  All this work was fast paced, long hours, and constant monitoring to enable the installation, testing, and energizing went off without a hitch, and it did. 

The team effort between the HDI, GSA, and building management with respect to the design, material fabrication and procurement process allowed short duration turn-around times over each three-day weekend making this such a successful project.

Devils Nose Shooting Area

United States Department of agriculture, Idaho Springs, CO

Installation of three shooting shade structures at the Devils Nose Shooting Area located at an elevation of 11,060 in the Roosevelt National Forest.  The work was multi-faceted; consisting of access road construction, roadway re-conditioning, accessible trails, mobilization, earthwork and demolition, blasting, rock and soil processing, timber stairs, and erosion control. 

Shooting shade structures include: structural steel and bracing, connections, steel framing, railings, wood carpentry, engineered lumber, wood sheathing, blocking, metal roofing, finishing. Roofing also included ice and water shields and fascia. 

In addition to storm drainage infrastructure, there are on-site rock walls and concrete walls, site features, landscaping, riprap, slope stabilization, and boulder placement.

Repair Landscaping Bldg. 30

Wyoming Air National Guard (WYANG),Cheyenne, WY

Removed existing wooden fence while keeping the metal and masonry supports in place.  HDI Installed a 4-inch concrete walking pad, removed rock ground cover and replaced with irrigated sod.  Soil excavated to 12 inches below the sidewalk grade, installed six inches of loam fill material, spread four inches of topsoil on top of the fill material and laid sod with new irrigation lines. HDI installed a new four-zone irrigational system connecting to a nearby water box with new electrical conduit.

Air Traffic Control Tower Parking Lot Expansion

Federal Aviation Adminitration, longmont, CO

Remote Air Traffic Control center road rehabilitation to include mobilization, excavation, asphalt pavement repairs, concrete, and drainage repair.  Including demolition of sloped sidewalk with ponding issues, Installation of new asphalt parking spaces and upgrading stormwater flow to existing storm drains. Placed new visitor’s parking lot sidewalk to the Child Care Facility.  Installed ADA compliant concrete ramp, re-work of irrigation system, constructed new sloped sidewalk solving ponding issues and replanting and sodding as necessary. 

Concrete Repair of Facilities Management Division Yard

National Insitute of standards and technology, boulder, co

Storage yard demolition and replacement of an existing concrete pad.  Concrete removed, new class 6 road base brought in and subgrade compacted. Road base laid in eight-inch lifts matching existing concrete edges. Water line placed across an existing roadway. New concrete and asphalt were poured back to the existing conditions with some irrigation line work and restoring the natural area.  Trenching (6’ x 4’) for a new frost-free hydrant was accomplished to connect to an existing storage area.