True Expertise + Working Ingenuity

WATER + WASTEWATER

ARCHITECTURE + ENGINEERING + ENVIRONMENTAL + PLANNING

Protecting Our Citizens, Resources, and EnvironmentTrue expertise coupled with unparalleled service means marked improvements

in a community’s access to clean, safe and affordable resources. ISG has a

rich history of building trusting relationships with public and private clients

and stakeholders. Together, we work to deliver high quality drinking water,

surface water, stormwater and wastewater technologies and solutions for

our clients and communities.

Our in-depth knowledge and understanding of regulations, environmental

conditions, procedures and processes enables our team of expert

engineers to confidently plan, design and address client’s individual needs

with innovative, budget-appropriate systems and services that maximize

operations and provide long-term value.

ISG provides high level architecture, engineering, environmental and planning services for a wide range of

markets. Our commitment to satisfy each project’s unique demands is relentless and unwavering from

start to finish.

EXPERTISE

Architecture

EngineeringEnvironmental

Planning

WORK

Agriculture

Civic and Culture

Commercial

Education

Energy

Government

Healthcare

Housing

Industrial

Mining

Public Works

Sports + Recreation

www.is-grp.com

LAWTON WATER TREATMENT PLANTLawton, IAHigh iron and manganese levels in the water of the City of Lawton

caused red/black water that was not able to be sequestered using

polyphosphates.

An iron and manganese removal water treatment plant was

designed using a unitized aeration-detention-filtration treatment

system. The tank was constructed of stainless steel to avoid

future corrosion. The treatment building was designed using a

concrete filled insulated plastic forming system that stays in place

providing a maintenance free building both inside and out. The

system has been producing good quality water from Dakota

Aquifer wells since 2006.

GOODHUE WATER TOWERGoodhue, MNA study was conducted for a new water distribution

system to serve the City of Goodhue. This study

included creating a model of the city’s existing water

system that was used to determine the effects of a new

water tower and water main improvements. When

complete, the project included a 250,000-gallon water

tower, a water main extension to existing infrastructure,

site plans and demolition of the existing tower.

WATERAccess to clean and safe drinking water is essential to the

well-being and prosperity of all communities. Residents and businesses rely on their

public leaders, administration and staff to provide this most basic, yet complicated,

lifeline. ISG has planned, designed and developed sustainable and cost-effective water

supply, treatment, pumping and distribution systems through the Upper Midwest.

Through our expertise, collaborative nature and results-driven solutions, communities

of all sizes and shape—from small systems to large systems—are experiencing the

benefits, value and integrity of our water systems.

Water Experience• Master Planning and Facility Plans

• Water Storage Facilities

• Water Distribution Systems

• Water Treatment Plants

• Wells and Pumping Stations

• Water Operations

• Valve Exercising

• Pipeline Rehabilitation/Replacement

• Hydraulic System Modeling and Analysis

• Fire Flow Modeling

FAIRMONT WATER TREATMENT PLANTFairmont, MNHigh iron and manganese levels in the water of the City of Lawton The

City of Fairmont had utilized Budd Lake as a raw water source since 1897

when the first pumping facility for raw water withdrawal was installed. The

latest water treatment plant was constructed nearly 80 years ago. When

the city constructed a new water treatment plant on an adjacent site, ISG

teamed with AE2S on the design and provided architectural, site design

and land surveying services. The project incorporated energy saving solar

tube lighting and rain gardens that reduce storm water runoff. It has been

an uncompromising success, both in terms of operations and water quality.

LOHRVILLE WATER TREATMENTLohrville, IAISG’s evaluation of Lohrville’s treatment system resulted in a recommendation to convert the

current softening process to an ion exchange system, allowing for a reduction in operator

attention and eliminating the presence of dust throughout the plant. The process continues to

utilize all of the existing filter system and piping, with only the addition of a new ion exchange

water softening system, and chemical feed pumps. Three pressure ion exchange vessels were

added and the entire inside of the plant was sand blasted and painted. The antiquated elevated

water tower was replaced with a modernized tower.

WEST BEND WATER TREATMENT IMPROVEMENTSWest Bend, IAAfter years of multiple repairs to their iron filter, heavy corrosion finally

caused the replacement of the unit for the City of West Bend, Iowa.

ISG prepared plans for a new factory built unitized aeration/detention/

filtration unit. This was the first all aluminum filtration unit constructed in

the State of Iowa. The tank resists corrosion and provides maintenance

free service. In addition, a large portion of the piping was replaced with

PVC piping, which will also provide a more maintenance free system. The

treatment plant now removes iron and manganese to below secondary

MCL limits.

www.is-grp.com

ALTA WASTEWATER TREATMENT PLANTAlta, IAYears of updating a 1950’s trickling filter treatment system led the City

of Alta to utilize ISG for an in-depth evaluation. Recent changes to

water quality standards required lower ammonia nitrogen and bacteria

discharge limits that could not currently be met. ISG recommended

construction of a new Aero-Mod, Inc. SEQUOX® activated sludge

system, which results in high energy efficiency and a smaller footprint

compared to other activated sludge designs, which lowers costs.

The new treatment system has shown significant improvement

over the previous system, yielding an average reduction of

NH3-N by 91% over the treatment efficiency of the old plant.

KINGSLEY WASTEWATER TREATMENTKinglsey, IAThe City of Kingsley’s aerated lagoon was not capable of meeting changes to Iowa’s

water quality standards, particularly in the

colder months. Following a detailed analysis,

ISG recommended retrofitting the existing wastewater

treatment lagoons using a Submerged Attached Growth Reactor

(SAGR). The SAGR is primarily designed to provide ammonia

removal in cold to moderate climates. An effluent ultraviolet

disinfection system also allows the city to meet more

stringent bacterial limits during summer months. Since the

Iowa Wastewater Design Standards did not specifically

address the SAGR process, the IDNR stepped in to approve it as an acceptable

alternative technology. This project was one of the first installations in Iowa

using SAGR technology.

WASTEWATEROur health and environment’s stability depends on the reliability, consistency

and quality of each community’s wastewater treatment initiatives. ISG’s

multi-disciplinary team uses their experience and ingenuity to help our clients

plan, design and implement for today’s needs and discover opportunities to

maximize performance, realize full capacity and prepare for the future.

From master plans that include assessment of existing facilities and

recommendations for improvements to complete wastewater facility design,

construction administration or wastewater collection systems, ISG knows the

regulatory requirements, understands the financial models and funding sources,

has the collaborative relationships and the true expertise to supply efficient and

cost-effective results.

• Master Planning and Facility Plans

• Wastewater Treatment Plants

• Sanitary Sewers/Wastewater Collection Systems

• Stabilization Ponds

• Wastewater Operations

• Lift Stations and Pumping Facilities

• Hydraulic System Modeling and Analysis

• Inflow/Infiltration Studies

• User Rate Studies

• Regulatory Assistance

• Industrial Wastewater Services

• In-house Structural and Electrical Design

SLOAN WASTEWATER TREATMENT PLANTSloan, IABecause the City of Sloan’s aging plant had been upgraded multiple

times and had difficulty meeting IDNR requirements, ISG designed

a new system consisting of a covered two-cell aerated lagoon with

a polishing reactor (LemTec™) and UV disinfection. A sewage

grinder is included in the inlet structure for the lagoon. The

covered aerated lagoon handles the increased loading from the

Infiltration and Inflow (I/I), and retains heat during winter months

which decreases the footprint needed for the nitrification process

in the polishing reactor. The new treatment system allows the city

to easily achieve effluent water quality limits as required by their

NPDES permit.

MADISON LAKE REGIONALIZATIONMadison Lake, MNWith ISG acting as the engineer for the City of Madison Lake, an

analysis of wastewater treatment options resulted in an outcome

of regionalization, rather than expansion or construction of a new

plant. It included the design and construction of a lift station and

forcemain, and treatment of Madison Lake’s sanitary sewer flows.

In addition, residents around three regional lakes wished to form

a sanitary sewer district and participate in the construction of the

regional forcemain. This resulted in a dual-purpose project that

serves the City of Madison Lake, and provides a sanitary sewer

outlet for over 400 lake homes.

www.is-grp.com

OTHER SPECIALIZED PUBLIC WORKS EXPERTISE

Municipal EngineeringInfrastructure, roads, bridges, water and sewer systems—it’s

the foundation of every public works project. It impacts the entire

community. It’s how we get to work each day, how we treat our natural

resources, and what we look at when traveling about our cities.

Municipal engineering is important work that demands highly skilled

engineers—engineers that are true experts in the technical aspects of

complex public projects. At ISG, our civil engineers take their job a step

further. They look at infrastructure as a responsibility. Their job is to serve

the people and to work together with their fellow citizens to ensure a

thriving and healthy environment, smooth mobility and wise use of public

and private funds.

TransportationTransportation networks, parking and pedestrian mobility have tremendous

impact on our communities, their economic viability, citizen satisfaction,

environmental health and future development. At ISG, we work closely

with our clients and work diligently to engage and listen to community

members, officials and stakeholders so we can fully understand their needs,

desires and development objectives and meet them with safe and efficient

solutions.

We plan, design and manage projects for a variety of

transportation infrastructure including highways, streets,

bridges and designs for traffic control and detour plans. Our

multi-disciplinary team of experts are well versed in state and federal

funding mechanisms and they analyze projects and advise clients on which

improvements are good candidates for those funding programs.

Land SurveyingAt ISG, we do more than recognize the fundamental importance of

measuring and collecting accurate site data. When our clients are provided

with accurate maps and site information, they are assured their investment

is safe, the survey is true, and they are building on a reliable legal foundation.

Whether the project requires simple boundary identification or a more

complex survey, ISG land surveyors accurately obtain information using

traditional survey methods complemented by the latest technology,

including in-house 3D laser scanning services.

Municipal AdministrationThere is a significant amount of work and extensive knowledge necessary

to efficiently run the day-to-day activities of a municipality. City clerks and

administrators work hard and wear several hats—and they readily admit

that often times some extra assistance and expertise could benefit their

city.

In the spirit of working ingenuity, ISG tapped our municipality experts

to offer administrative services and counsel. Our group has former city

administrators on staff that can help guide your community in planning and

zoning, community and economic development and administrative needs.

Municipal Resource PlanningIt’s inevitable. As our cities grow and age, there is a great need for a variety of

improvements to facilities and infrastructure. Our planners have developed

Capital Improvement Programs to help cities prioritize improvements and

ensure public funds are used most efficiently.

We use our expertise to gather information and study your proposed

projects. We then develop weighted scoring criteria that determine project

importance. Finally, we provide accurate project costs to assist decision

makers as we develop the very best foundation for the improvement plan.

As part of the plan, ISG will assist with exploring ways to best finance capital

improvements, including the potential for federal, state and agency loans

and grants.

Mankato, MNMinneapolis/St. Paul, MNFaribault, MNDes Moines, IAStorm Lake, IAAlgona, IALa Crosse, WI

www.is-grp.com

ARCHITECTURE

Architecture

Interior Design

Landscape Architecture

Planning

ENGINEERING

Civil

Electrical

Land Surveying

Municipal

Mechanical

Structural

Transportation

ENVIRONMENTAL

Assessments

Geographic Information

Systems

Permitting

Planning + Feasibility

Testing

PLANNING

Community

Municipal

Resources