Projects

Alden provided structural and hydraulic engineering and CFD modeling to replace the Poudre River drop structure with a stepped spillway and stilling basin.

An innovative large scale enclosed pressure grouting test chamber is being used to evaluate and optimize grout mix design performance at Logan Martin Dam

Read how Alden tested the effects of innovative downstream fish passage technologies with lab, CFD, and field analysis. Funded by the Department of Energy

Alden performed mock-up flow testing to help determine the effects of cured in place pipe lining on flow performance at the Seabrook Nuclear Power Plant.

Alden constructed two 1:65-scale, live-bed physical models to test performance and effectiveness of the proposed land rebuilding diversions on the Mississippi River.

Alden performed mock-up testing to correctly simulate tension on a tethered ROV

Alden used CFD to evaluate and improve a heat recovery steam generator (HRSG) performance

Physical model study to determine hydraulic performance of a proposed auxiliary spillway system during flooding events

investigation of the hydraulic, thermal, and sediment dynamics within a cooling water intake forebay on the Ohio River, including both 3D numeric and physical modeling

Read how CFD modeling was used to show compliance with specifications and code requirements for a major New England rail station.

Using Turbine Survival Models and Existing Data to Understand the Impacts of Hydropower Projects on an Endangered Species

A report was developed to provide an updated review of the state of knowledge on fish protection technologies to meet 316(b) requirements

Read about a multi-year, multi-phase impingement survival study that included small-scale, tabletop testing along with large-scale prototype testing involving multiple species.

When historic floods damaged the St. Vrain Diversion Structure, a design-build team was contracted to replace the hydraulic structures as quickly as possible. Read how Alden meet the aggressive schedule.

Read how CFD and scaled physical modeling was used to evaluate the performance of the planned WFGD and designed a spray grid for the WFGD absorber to optimize SO2 removal.

Read how a CFD model helped to confirm adequate mixing in a proposed Monogram Foods Anaerobic Digester Basin, which employs KLa's K2DJM-10 jet mixing system.

Read about an SDA unit that was showing signs of improper droplet evaporation, and how CFD modeling was used to predict spray and deposition patterns in an SDA reactor in order to develop a solution to improve droplet evaporation.

Spillway upgrades to Canton Dam took advantage of hybrid modeling using integrated numerical and physical modeling to ensure its design & safety. Read how

Using a 1:12 scaled physical hydraulic model, Alden tested a new whitewater course design at Coweta Falls to ensure the course would perform as designed.

CFD modeling and biological evaluations were used to develop effective downstream passage for endangered shortnose sturgeon

This project involved structural engineering services from feasibility through design and construction for TDG modifications to five of the eight spill bays at Cabinet Gorge Dam.

The Mathis Dam spillway project highlights Alden's integrated hydraulic and structural engineering services.

Running CFD models for existing and upscaled chromatography columns helped determine the cause of reduced performance and subsequently produced a redesign.

CFD and physical modeling were used to resolve performance, navigation, constructability and cost issues in the design of a low head hydropower project

As a 90 ft. x 120 ft. movable bed physical model, the expanded small scale physical model is one of the largest of its kind in the world

Alden performed design studies using CFD and physical modeling, as well as field startup testing of the Floating Surface Collector.

Design upgrades were supported by CFD model studies used to assist in evaluating the hydraulic and sedimentation performance

Innovative 3D CFD modeling was used to design a fishway to mimic natural bedrock following removal of tow spillway dams.

Field testing of pump performance was used to help determine feasibility of and recommended technology to monitor cooling water intake flow rates.

Read how Alden redesigned a heat recovery system for a power plant exhaust system and confirmed performance goals with CFD

Read how scaled physical flow modeling helped eliminate coal ash deposition at a power plant in Minnesota