Regulations, Compliance & Standards

The Cedar Cliff dam and hydropower project is located approximately six miles from Cullowhee, in Jackson Country, North...

In order to meet screen velocity requirements of the Clean Water Act 316 b rule, American Electric Power has investigated...

Plant McDonough, owned and operated by Southern Company, has experienced excessive siltation at the makeup water intake. ...

In response to hurricane Katrina, the US Army Corps of Engineers decided to increase the frontal protection on four pump...

ALDEN conducted a comprehensive, multi-faceted flow model study of the addition of a proposed powerhouse (including three...

The existing flood control dam at Canton, Oklahoma, was being upgraded with an auxiliary spillway to enable it to safely...

McLaughlin Whitewater Design Group was developing a new course at Coweta Falls on the Lower Chattahoochee River near...

As part of Austin, Texas, Waller Creek has historically had problems with flooding, erosion and water quality. The addition...

To support design upgrades to the existing Primary Settling Tanks (PSTs) of the 26th Ward Waste Water Treatment Plant...

As part of project/dam surrender and removal efforts at the Saccarappa Hydroelectric Project (Saccarappa), Alden provided S....

Starting in 2009, Alden has been working with a confidential nuclear power facility to determine the feasibility of...

A major component of an Atlantic salmon population model developed by NMFS is the survival of smolts and kelts passing...

The Electric Power Research Institute (EPRI) has funded laboratory studies at Alden on the biological efficacy of fine-mesh...

In 2012, Alden developed a report providing an updated review of the state of knowledge on fish protection technologies for...

The main objective of the study was to determine the post-collection survival of larval fish when exposed to compounding...

The Highland Ditch Company services more than 40,000 acres of farmland. Its primary diversion infrastructure is located near...

Alden's Modeling of the Smithland Lock and Dam powerhouse project is an example of coordinated use of Computational Fluid...

Alden designed, constructed and tested a ~1:7 Froude scale physical hydraulic model to evaluate the hydraulic performance of...

Alden’s engineers and biologists conducted extensive CFD modeling and biological evaluations to help the Holyoke Gas &...

On startup, the air quality control system (AQCS) at Deerhaven Generating Station was not able to meet its guarantees for SO...

Designed to simulate the Mississippi River’s depth, sediment, and flow, the Lower Mississippi River Physical Model is used...

The Littoral Combat Ship (LCS) concept boat was studied for the U.S. Navy.  The LCS is intended to operate in coastal areas...

Alden performed design studies and field startup testingof PSE’s Upper and Lower Baker Dams Floating Surface Collector (FSC)...

Alden conducted CFD and physical modeling studies to support the design of the new power plant at the Taweelah Smelter...

Alden designed, constructed, and tested two 1:20 scale physical hydraulic models of the new 2-mile long surge protection...

During periods of spill, Cabinet Gorge Dam was generating total dissolved gas (TDG) concentrations in excess of water...

The Mathis Dam Spillway project highlights Alden’s integrated hydraulic and structural engineering services in which there...

One chromatography column developer was having challenges scaling up an existing design to a larger version. Our team worked...

Background

The South Station Transportation Center (SSTC), located in Boston, Massachusetts, consists of a train terminal,...

An existing roof vent arrangement was allowing rainwater to enter the Pot Room. Alden supported efforts to develop a roof...

A streamlined modeling approach reduced both cost and time to achieve an optimized design solution.

Williams Station Unit 1...

A three-dimensional computational fluid dynamics (CFD) model was used to evaluate the time-averaged steady-state flow field...

When an SDA unit that was showing signs of improper droplet evaporation, CFD modeling was used to predict spray and...

Clay Boswell Energy Center Unit 4 is a coal fired station owned by Minnesota Power. The plant had a need to reduce flue gas...

Shiller Station, a 150 MW coal and oil fired station owned by Public Service Company of New Hampshire, was experiencing high...

Our team and Air Consulting Associates (ACA) were was contracted by Southern Environmental Inc. (SEI) for the planned...

Alden simulated the planned Kansas City Power and Light Iatan Unit 2 (POWER Magazine’s 2011 plant of the year) Selective...

Marsulex Environmental Technologies (MET) contracted Alden to re-engineer a heat recovery system for flue gas reheat at...

Through funding made available by the U.S. Department of Energy, Alden conducted a series of studies to evaluate and...

Clay Boswell Station Unit 4, a 535 MW coal fired station owned by Minnesota Power, planned to retrofit a new SO2 removal...

Alden was retained by the Northern Water Conservancy District (Northern Water) for the Hansen Supply Canal Poudre River Drop...

Alden was contracted by Imperia Engineering for mock-up and head loss testing of cured in place pipe (CIPP) lining. Seabrook...

Even though McGuire Nuclear Power Plant is located on the shores of Lake Norman, it relies on cooling water from a separate...

Dam Remediation Using High and Low Mobility Pressure Grouting

Logan Martin Dam, owned and operated by Alabama Power Company,...

A Heat Recovery Steam Generator (HRSG) had suspected flow deficiencies which was causing suboptimal performance of the unit....