Preserving America’s Heritage

ADVISORY COUNCIL ON HISTORIC PRESERVATION

Protecting Historic Properties:

A CITIZEN’S GUIDE TO 

SECTION 106 REVIEW

Protecting Historic Properties

WWW.ACHP.GOV
 Protecting Historic Properties 1

Th e mission of the Advisory Council on Historic Preservation 

(ACHP) is to promote the preservation, enhancement, and 

productive use of the nation’s historic resources and advise the 

President and Congress on national historic preservation policy.

Th e ACHP, an independent federal agency, also provides a 

forum for infl uencing federal activities, programs, and policies 

that aff ect historic properties. In addition, the ACHP has a key 

role in carrying out the Preserve America program. 

Th e 23-member council is supported by a professional staff in 

Washington, D.C. For more information contact:

Advisory Council on Historic Preservation

1100 Pennsylvania Avenue, NW, Suite 803

Washington, D.C. 20004

(202) 606-8503

www.achp.gov

CONTENTS

4 What is Section 106 Review? 

5 Understanding Section 106 Review

8 Determining Federal Involvement

12 Working with Federal Agencies

14 Infl uencing Project Outcomes

18 How the ACHP Can Help

20 When Agencies Don’t Follow the Rules

21 Following Through

22 Contact Information

About the ACHP

COVER PHOTOS: 

Clockwise, from top left: Historic Downtown Louisville, 

Kentucky; Section 106 consultation at Medicine Lake, 

California; bighorn sheep petroglyph in Nine Mile Canyon, 

Utah (photo courtesy Jerry D. Spangler); Worthington 

Farm, Monocacy Battlefi eld National Historic Landmark, 

Maryland (photo courtesy Maryland State Highway 

Administration).
2 ADVISORY COUNCIL ON HISTORIC PRESERVATION Protecting Historic Properties 3

Proud of your heritage? Value the places that refl ect your 

community’s history? You should know about Section 106 

review, an important tool you can use to infl uence federal 

decisions regarding historic properties. By law, you have a voice 

when a project involving federal action, approval, or funding 

may aff ect properties that qualify for the National Register of 

Historic Places, the nation’s offi cial list of historic properties. 

Th is guide from the Advisory Council on Historic Preservation 

(ACHP), the agency charged with historic preservation 

leadership within federal government, explains how your voice 

can be heard. 

Each year, the federal government is involved with many projects 

that aff ect historic properties. For example, the Federal Highway 

Administration works with states on road improvements, the 

Department of Housing and Urban Development grants funds 

to cities to rebuild communities, and the General Services 

Administration builds and leases federal offi ce space. 

Agencies like the Forest Service, the National Park Service, the 

Bureau of Land Management, the Department of Veterans 

Aff airs, and the Department of Defense make decisions daily 

Introduction

Dust from vehicles may 

affect historic sites in 

Nine Mile Canyon, Utah. 

(photo courtesy Jerry D. 

Spangler, Colorado Plateau 

Archaeological Alliance)

about the management of federal buildings, parks, forests, and 

lands. Th ese decisions may aff ect historic properties, including 

those that are of traditional religious and cultural signifi cance 

to federally recognized Indian tribes and Native Hawaiian 

organizations.

Projects with less obvious federal involvement can also 

have repercussions on historic properties. For example, the 

construction of a boat dock or a housing development that 

aff ects wetlands may also impact fragile archaeological sites and 

require a U.S. Army Corps of Engineers permit. Likewise, the 

construction of a cellular tower may require a license from the 

Federal Communications Commission and might compromise 

historic or culturally signifi cant landscapes or properties 

valued by Indian tribes or Native Hawaiian organizations for 

traditional religious and cultural practices. 

Th ese and other projects with federal involvement can harm 

historic properties. Th e Section 106 review process gives you 

the opportunity to alert the federal government to the historic 

properties you value and infl uence decisions about projects that 

aff ect them.

Public Involvement Matters
4 ADVISORY COUNCIL ON HISTORIC PRESERVATION Protecting Historic Properties 5

In the National Historic Preservation Act of 1966 (NHPA), 

Congress established a comprehensive program to preserve 

the historical and cultural foundations of the nation as a 

living part of community life. Section 106 of the NHPA is 

crucial to that program because it requires consideration of 

historic preservation in the multitude of projects with federal 

involvement that take place across the nation every day. 

Section 106 requires federal agencies to consider the eff ects of 

projects they carry out, approve, or fund on historic properties. 

Additionally, federal agencies must provide the ACHP an 

opportunity to comment on such projects prior to the agency’s 

decision on them. 

Section 106 review encourages, but does not mandate, 

preservation. Sometimes there is no way for a needed project to 

proceed without harming historic properties. Section 106 review 

does ensure that preservation values are factored into federal 

agency planning and decisions. Because of Section 106, federal 

agencies must assume responsibility for the consequences of the 

projects they carry out, approve, or fund on historic properties 

and be publicly accountable for their decisions.

What is Section 106 Review?

Regulations issued by the ACHP spell out the Section 106 

review process, specifying actions federal agencies must take to 

meet their legal obligations. Th e regulations are published in the 

Code of Federal Regulations at 36 CFR Part 800, “Protection of 

Historic Properties,” and can be found on the ACHP’s Web site 

at www.achp.gov.

Federal agencies are responsible for initiating Section 106 review, 

most of which takes place between the agency and state and 

tribal or Native Hawaiian organization offi cials. Appointed by 

the governor, the State Historic Preservation Offi cer (SHPO) 

coordinates the state’s historic preservation program and consults 

with agencies during Section 106 review. 

Agencies also consult with offi cials of federally recognized Indian 

tribes when the projects have the potential to aff ect historic 

properties on tribal lands or historic properties of signifi cance 

to such tribes located off tribal lands. Some tribes have offi cially 

designated Tribal Historic Preservation Offi cers (THPOs), 

while others designate representatives to consult with agencies 

as needed. In Hawaii, agencies consult with Native Hawaiian 

organizations (NHOs) when historic properties of religious and 

cultural signifi cance to them may be aff ected. 

To successfully complete Section 106 review, 

federal agencies must do the following: 

gather information to decide which properties in the 

area that may be aff ected by the project are listed, or are 

eligible for listing, in the National Register of Historic 

Places (referred to as “historic properties”); 

determine how those historic properties might be aff ected; 

explore measures to avoid or reduce harm (“adverse 

eff ect”) to historic properties; and 

reach agreement with the SHPO/THPO (and the 

ACHP in some cases) on such measures to resolve any 

adverse eff ects or, failing that, obtain advisory comments 

from the ACHP, which are sent to the head of the agency.

Understanding 

Section 106 Review

The National Soldiers Monument (1877) at Dayton 

(Ohio) National Cemetery was cleaned and 

conserved in 2009 as part of a program funded 

by the American Recovery and Reinvestment Act. 

(photo courtesy Department of Veterans Affairs)

Conservation
6 ADVISORY COUNCIL ON HISTORIC PRESERVATION Protecting Historic Properties 7

What are Historic Properties?

In the Section 106 process, a historic property is a prehistoric 

or historic district, site, building, structure, or object included 

in or eligible for inclusion in the National Register of Historic 

Places. Th is term includes artifacts, records, and remains 

that are related to and located within these National Register 

properties. Th e term also includes properties of traditional 

religious and cultural importance to an Indian tribe or Native 

Hawaiian organization, so long as that property also meets the 

criteria for listing in the National Register.

Th e National Register of Historic Places

Th e National Register of Historic Places is the nation’s offi cial 

list of properties recognized for their signifi cance in American 

history, architecture, archaeology, engineering, and culture. It 

is administered by the National Park Service, which is part of 

the Department of the Interior. Th e Secretary of the Interior 

has established the criteria for evaluating the eligibility of 

properties for the National Register. In short, the property 

must be signifi cant, be of a certain age, and have integrity: 

Signifi cance. Is the property associated with events, 

activities, or developments that were important in the 

past? With the lives of people who were historically 

important? With distinctive architectural history, 

landscape history, or engineering achievements? Does it 

have the potential to yield important information through 

archaeological investigation about our past? 

Age and Integrity. Is the property old enough to be 

considered historic (generally at least 50 years old) and 

does it still look much the way it did in the past? 

During a Section 106 review, the federal agency evaluates 

properties against the National Register criteria and seeks the 

consensus of the SHPO/THPO/tribe regarding eligibility. A 

historic property need not be formally listed in the National 

Register in order to be considered under the Section 106 

process. Simply coming to a consensus determination that a 

property is eligible for listing is adequate to move forward with 

Section 106 review. (For more information, visit the National 

Register Web site at www.cr.nps.gov/nr).

When historic properties may be harmed, Section 106 review 

usually ends with a legally binding agreement that establishes 

how the federal agency will avoid, minimize, or mitigate the 

adverse eff ects. In the very few cases where this does not occur, 

the ACHP issues advisory comments to the head of the agency 

who must then consider these comments in making a fi nal 

decision about whether the project will proceed. 

Section 106 reviews ensure federal agencies fully consider 

historic preservation issues and the views of the public during 

project planning. Section 106 reviews do not mandate the 

approval or denial of projects.

SECTION 106: WHAT IS AN 

ADVERSE EFFECT? 

If a project may alter characteristics that qualify a 

specifi c property for inclusion in the National Register 

in a manner that would diminish the integrity of 

the property, that project is considered to have an 

adverse effect. Integrity is the ability of a property to 

convey its signifi cance, based on its location, design, 

setting, materials, workmanship, feeling, and association. 

Adverse effects can be direct or indirect and 

include the following: 

physical destruction or damage 

alteration inconsistent with the Secretary of the 

Interior’s Standards for the Treatment of Historic 

Properties

relocation of the property 

change in the character of the property’s use or 

setting 

introduction of incompatible visual, atmospheric, 

or audible elements 

neglect and deterioration 

transfer, lease, or sale of a historic property 

out of federal control without adequate 

preservation restrictions
8 ADVISORY COUNCIL ON HISTORIC PRESERVATION Protecting Historic Properties 9

If you are concerned about a proposed project and wondering 

whether Section 106 applies, you should fi rst determine 

whether the federal government is involved. Will a federal 

agency fund or carry out the project? Is a federal permit, 

license, or approval needed? Section 106 applies only if a 

federal agency is carrying out the project, approving it, or 

funding it, so confi rming federal involvement is critical.

Determining Federal 

Involvement

IS THERE FEDERAL 

INVOLVEMENT? CONSIDER 

THE POSSIBILITIES: 

Is a federally owned or federally controlled 

property involved, such as a military base, 

park, forest, offi ce building, post offi ce, or 

courthouse? Is the agency proposing a project on 

its land, or would it have to provide a right-of-way 

or other approval to a private company for a project 

such as a pipeline or mine? 

Is the project receiving federal funds, 

grants, or loans? If it is a transportation project, 

frequent sources of funds are the Federal Highway 

Administration, the Federal Transit Administration, 

and the Federal Railroad Administration. Many 

local government projects receive funds from the 

Department of Housing and Urban Development. 

The Federal Emergency Management Agency 

provides funds for disaster relief. 

Does the project require a federal permit, 

license, or other approval? Often housing 

developments impact wetlands, so a U.S. Army 

Corps of Engineers permit may be required. Airport 

projects frequently require approvals from the 

Federal Aviation Administration. 

Many communications activities, including cellular 

tower construction, are licensed by the Federal 

Communications Commission. Hydropower and 

pipeline development requires approval from the 

Federal Energy Regulatory Commission. Creation of 

new bank branches must be approved by the Federal 

Deposit Insurance Corporation.

Falls of Clyde, in Honolulu, Hawaii, is the last surviving 

iron-hulled, four-masted full rigged ship, and the only 

remaining sail-driven oil tanker. (photo courtesy 

Bishop Museum Maritime Center)

Historic
10 ADVISORY COUNCIL ON HISTORIC PRESERVATION Protecting Historic Properties 11

Interstate 70 at the Georgetown-Silver Plume 

National Historic Landmark, Colorado (photo 

courtesy J.F. Sato & Associates)

Federal Funds

Sometimes federal involvement is obvious. Often, involvement 

is not immediately apparent. If you have a question, contact the 

project sponsor to obtain additional information and to inquire 

about federal involvement. All federal agencies have Web sites. 

Many list regional or local contacts and information on major 

projects. Th e SHPO/THPO/tribe, state or local planning 

commissions, or statewide historic preservation organizations 

may also have project information. 

Once you have identifi ed the responsible federal agency, write 

to the agency to request a project description and inquire about 

the status of project planning. Ask how the agency plans to 

comply with Section 106, and voice your concerns. Keep the 

SHPO/THPO/tribe advised of your interest and contacts 

with the federal agency.

MONITORING FEDERAL 

ACTIONS 

The sooner you learn about proposed projects 

with federal involvement, the greater your chance of 

infl uencing the outcome of Section 106 review. 

Learn more about the history of your neighborhood, 

city, or state. Join a local or statewide preservation, 

historical, or archaeological organization. These 

organizations are often the ones fi rst contacted by 

federal agencies when projects commence. 

If there is a clearinghouse that distributes information 

about local, state, tribal, and federal projects, make 

sure you or your organization is on its mailing list. 

Make the SHPO/THPO/tribe aware of your interest. 

Become more involved in state and local decision 

making. Ask about the applicability of Section 106 to 

projects under state, tribal, or local review. Does your 

state, tribe, or community have preservation laws in 

place? If so, become knowledgeable about and active 

in the implementation of these laws. 

Review the local newspaper for notices about 

projects being reviewed under other federal 

statutes, especially the National Environmental 

Policy Act (NEPA). Under NEPA, a federal agency 

must determine if its proposed major actions will 

signifi cantly impact the environment. Usually, if 

an agency is preparing an Environmental Impact 

Statement under NEPA, it must also complete a 

Section 106 review for the project. 
12 ADVISORY COUNCIL ON HISTORIC PRESERVATION Protecting Historic Properties 13

Th roughout the Section 106 review process, federal agencies 

must consider the views of the public. Th is is particularly 

important when an agency is trying to identify historic 

properties that might be aff ected by a project and is considering 

ways to avoid, minimize, or mitigate harm to them. 

Agencies must give the public a chance to learn about the 

project and provide their views. How agencies publicize 

projects depends on the nature and complexity of the particular 

project and the agency’s public involvement procedures. 

Public meetings are often noted in local newspapers and on 

television and radio. A daily government publication, the 

Federal Register (available at many public libraries and online at 

www.gpoaccess.gov/fr/index.html), has notices concerning 

projects, including those being reviewed under NEPA. Federal 

agencies often use NEPA for purposes of public outreach 

under Section 106 review. 

Federal agencies also frequently contact local museums and 

historical societies directly to learn about historic properties 

and community concerns. In addition, organizations like 

the National Trust for Historic Preservation (NTHP) are 

actively engaged in a number of Section 106 consultations on 

projects around the country. Th e NTHP is a private, nonprofi t membership organization dedicated to saving historic 

places and revitalizing America’s communities. Organizations 

Working with Federal Agencies

like the NTHP and your state and local historical societies 

and preservation interest groups can be valuable sources of 

information. Let them know of your interest. 

When the agency provides you with information, let the 

agency know if you disagree with its fi ndings regarding what 

properties are eligible for the National Register of Historic 

Places or how the proposed project may aff ect them. Tell the 

agency—in writing—about any important properties that you 

think have been overlooked or incorrectly evaluated. Be sure to 

provide documentation to support your views. 

When the federal agency releases information about project 

alternatives under consideration, make it aware of the options 

you believe would be most benefi cial. To support alternatives 

that would preserve historic properties, be prepared to discuss 

costs and how well your preferred alternatives would meet 

project needs. Sharing success stories about the treatment or 

reuse of similar resources can also be helpful. 

Applicants for federal assistance or permits, and their 

consultants, often undertake research and analyses on behalf of 

a federal agency. Be prepared to make your interests and views 

known to them, as well. But remember the federal agency is 

ultimately responsible for completing Section 106 review, so 

make sure you also convey your concerns directly to it. 

Hangar 1, a historic dirigible 

hangar at Moffett Field at 

NASA Ames Research 

Center, California

Learn About the Project
14 ADVISORY COUNCIL ON HISTORIC PRESERVATION Protecting Historic Properties 15

In addition to seeking the views of the public, federal agencies 

must actively consult with certain organizations and individuals 

during review. Th is interactive consultation is at the heart of 

Section 106 review. 

Consultation does not mandate a specifi c outcome. Rather, it 

is the process of seeking, discussing, and considering the views 

of consulting parties about how project eff ects on historic 

properties should be handled. 

To infl uence project outcomes, you may work through the 

consulting parties, particularly those who represent your 

interests. For instance, if you live within the local jurisdiction 

where a project is taking place, make sure to express your views 

on historic preservation issues to the local government offi cials 

who participate in consultation. 

Infl uencing Project Outcomes

You or your organization may want to take a more active 

role in Section 106 review, especially if you have a legal or 

economic interest in the project or the aff ected properties. You 

might also have an interest in the eff ects of the project as an 

individual, a business owner, or a member of a neighborhood 

association, preservation group, or other organization. Under 

these circumstances, you or your organization may write to the 

federal agency asking to become a consulting party. 

WHO ARE 

CONSULTING PARTIES? 

 The following parties are entitled to participate as 

consulting parties during Section 106 review: 

Advisory Council on Historic Preservation;

State Historic Preservation Offi cers; 

Federally recognized Indian tribes/THPOs; 

Native Hawaiian organizations; 

Local governments; and 

Applicants for federal assistance, permits, 

licenses, and other approvals. 

Other individuals and organizations with a 

demonstrated interest in the project may participate 

in Section 106 review as consulting parties “due to 

the nature of their legal or economic relation to the 

undertaking or affected properties, or their concern 

with the undertaking’s effects on historic properties.” 

Their participation is subject to approval by the 

responsible federal agency. 

Residents in the Lower Mid-City Historic District 

in New Orleans express their opinions about 

the proposed acquisition and demolition of their 

properties for the planned new Department of 

Veterans Affairs and Louisiana State University 

medical centers which would replace the facilities 

damaged as a result of Hurricane Katrina.

Sp p eak U
16 ADVISORY COUNCIL ON HISTORIC PRESERVATION Protecting Historic Properties 17

When requesting consulting party status, explain in a letter to 

the federal agency why you believe your participation would be 

important to successful resolution. Since the SHPO/THPO 

or tribe will assist the federal agency in deciding who will 

participate in the consultation, be sure to provide the SHPO/

THPO or tribe with a copy of your letter. Make sure to 

emphasize your relationship with the project and demonstrate 

how your connection will inform the agency’s decision making. 

If you are denied consulting party status, you may ask the 

ACHP to review the denial and make recommendations to 

the federal agency regarding your participation. However, the 

federal agency makes the ultimate decision on the matter.

Consulting party status entitles you to share your views, receive 

and review pertinent information, off er ideas, and consider 

possible solutions together with the federal agency and other 

consulting parties. It is up to you to decide how actively you 

want to participate in consultation.

MAKING THE MOST OF 

CONSULTATION 

Consultation will vary depending on the federal 

agency’s planning process and the nature of the project 

and its effects. 

Often consultation involves participants with a wide 

variety of concerns and goals. While the focus of some 

may be preservation, the focus of others may be time, 

cost, and the purpose to be served by the project.

Effective consultation occurs when you: 

keep an open mind; 

state your interests clearly; 

acknowledge that others have legitimate 

interests, and seek to understand and 

accommodate them; 

consider a wide range of options; 

identify shared goals and seek options that allow 

mutual gain; and

bring forward solutions that meet the agency’s 

needs.

Creative ideas about alternatives—not complaints—

are the hallmarks of effective consultation.

Section 106 consultation with an Indian tribe

Get Involved
18 ADVISORY COUNCIL ON HISTORIC PRESERVATION Protecting Historic Properties 19

Under Section 106 review, most harmful eff ects are addressed 

successfully by the federal agency and the consulting parties 

without participation by the ACHP. So, your fi rst points 

of contact should always be the federal agency and/or the 

SHPO/THPO. 

When there is signifi cant public controversy, or if the 

project will have substantial eff ects on important historic 

properties, the ACHP may elect to participate directly in the 

consultation. Th e ACHP may also get involved if important 

policy questions are raised, procedural problems arise, or if 

there are issues of concern to Indian tribes or Native Hawaiian 

organizations. 

Whether or not the ACHP becomes involved in consultation, 

you may contact the ACHP to express your views or to request 

guidance, advice, or technical assistance. Regardless of the 

How the ACHP Can Help

scale of the project or the magnitude of its eff ects, the ACHP 

is available to assist with dispute resolution and advise on the 

Section 106 review process. 

If you cannot resolve disagreements with the federal agency 

regarding which historic properties are aff ected by a project 

or how they will be impacted, contact the ACHP. Th e ACHP 

may then advise the federal agency to reconsider its fi ndings.

CONTACTING THE ACHP: 

A CHECKLIST 

When you contact the ACHP, try to have the 

following information available: 

the name of the responsible federal agency and 

how it is involved; 

a description of the project; 

the historic properties involved; and 

a clear statement of your concerns about the 

project and its effect on historic properties. 

If you suspect federal involvement but have been 

unable to verify it, or if you believe the federal agency 

or one of the other participants in review has not 

fulfi lled its responsibilities under the Section 106 

regulations, you can ask the ACHP to investigate. In 

either case, be as specifi c as possible.

A panel of ACHP members listen to comments 

during a public meeting.

Collecting Comments g
20 ADVISORY COUNCIL ON HISTORIC PRESERVATION Protecting Historic Properties 21

A federal agency must conclude Section 106 review before 

making a decision to approve a project, or fund or issue a 

permit that may aff ect a historic property. Agencies should not 

make obligations or take other actions that would preclude 

consideration of the full range of alternatives to avoid or 

minimize harm to historic properties before Section 106 

review is complete. 

If the agency acts without properly completing Section 106 

review, the ACHP can issue a fi nding that the agency has 

prevented meaningful review of the project. Th is means that, 

in the ACHP’s opinion, the agency has failed to comply with 

Section 106 and therefore has not met the requirements of 

federal law. 

A vigilant public helps ensure federal agencies comply fully 

with Section 106. In response to requests, the ACHP can 

investigate questionable actions and advise agencies to take 

corrective action. As a last resort, preservation groups or 

individuals can litigate in order to enforce Section 106. 

If you are involved in a project and it seems to be getting off 

track, contact the agency to voice your concern. Call the SHPO 

or THPO to make sure they understand the issue. Call the 

ACHP if you feel your concerns have not been heard.

When Agencies Don’t 

Follow the Rules

After agreements are signed, the public may still play a role in 

the Section 106 process by keeping abreast of the agreements 

that were signed and making sure they are properly carried out. 

Th e public may also request status reports from the agency.

Designed to accommodate project needs and historic values, 

Section 106 review relies on strong public participation. 

Section 106 review provides the public with an opportunity to 

infl uence how projects with federal involvement aff ect historic 

properties. By keeping informed of federal involvement, 

participating in consultation, and knowing when and whom to 

ask for help, you can play an active role in deciding the future of 

historic properties in your community. 

Section 106 review gives you a chance to weigh in when 

projects with federal involvement may aff ect historic properties 

you care about. Seize that chance, and make a diff erence! 

Following Th rough

Milton Madison Bridge over the Ohio River between 

Kentucky and Indiana (photo courtesy Wilbur Smith 

Associates/Michael Baker Engineers)

Stay Informed
22 ADVISORY COUNCIL ON HISTORIC PRESERVATION Protecting Historic Properties 23

Contact Information

National Park Service 

Heritage Preservation Services

1849 C Street, NW (2255)

Washington, D.C. 20240 

E-mail: NPS_HPS-info@nps.gov

Web site: www.nps.gov/history/hps

National Register of Historic Places

1201 Eye Street, NW (2280)

Washington, D.C. 20005

Phone: (202) 354-2211

Fax: (202) 371-6447

E-mail: nr_info@nps.gov

Web site: www.nps.gov/history/nr 

National Trust for Historic Preservation 

1785 Massachusetts Avenue, NW

Washington, D.C. 20036-2117

Phone: (800) 944-6847 or (202) 588-6000

Fax: (202) 588-6038

Web site: www.preservationnation.org

The National Trust has regional offi ces in San Francisco, Denver, 

Fort Worth, Chicago, Boston, and Charleston, as well as fi eld 

offi ces in Philadelphia and Washington, D.C.

Offi ce of Hawaiian Affairs

711 Kapi`olani Boulevard, Suite 500

Honolulu, HI 96813

Phone: (808) 594-1835

Fax: (808) 594-1865

E-mail: info@oha.org

Web site: www.oha.org

Advisory Council on Historic Preservation 

Offi ce of Federal Agency Programs

1100 Pennsylvania Avenue, NW, Suite 803

Washington, D.C. 20004

Phone: (202) 606-8503

Fax: (202) 606-8647

E-mail: achp@achp.gov

Web site: www.achp.gov

The ACHP’s Web site includes more information about working 

with Section 106 and contact information for federal agencies, 

SHPOs, and THPOs.

National Association of Tribal Historic 

Preservation Offi cers 

P.O. Box 19189

Washington, D.C. 20036-9189

Phone: (202) 628-8476

Fax: (202) 628-2241

E-mail: info@nathpo.org

Web site: www.nathpo.org

National Conference of State Historic 

Preservation Offi cers 

444 North Capitol Street, NW, Suite 342

Washington, D.C. 20001

Phone: (202) 624-5465

Fax: (202) 624-5419

Web site: www.ncshpo.org

For the SHPO in your state, see www.ncshpo.org/fi nd/index.htm
24 ADVISORY COUNCIL ON HISTORIC PRESERVATION Protecting Historic Properties 25

Beneath the Surface

Ohio Department of Transportation 

workers made an unanticipated 

archaeological discovery while working just 

north of Chillicothe along state Route 104. 

It is a remnant of an Ohio & Erie Canal 

viaduct. (photo courtesy Bruce W. Aument, 

Staff Archaeologist, ODOT/Offi ce of 

Environmental Services)
TO LEARN MORE

For detailed information about the ACHP, Section 106 review 

process, and our other activities, visit us at www.achp.gov or 

contact us at:

Advisory Council on Historic Preservation

1100 Pennsylvania Avenue, NW, Suite 803

Washington, D.C. 20004

Phone: (202) 606-8503

Fax: (202) 606-8647

E-mail: achp@achp.gov

WWW.ACHP.GOV Preserving America’s Heritage

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