Cultural Resources Mon

Grand Canyon Nationa

TWG Presentation

Phoenix, AZ

February 27, 2003
What is Cultural Resources Mon

•Monitoring is a tool to detect change -- the direction, extent and intensity•Monitoring focuses on answering specific qrelated to preservation and integrity of historalong the river corridor. Answers to these qudirect management decisions
10/7/96 1

Ability to Detect Change

Bank slump
2/2/91

Ability to Detect Change

• 9,800 ph• 18 sites wphotograp• Data ana• Repeat p(Manone)

Gully formation
11/02 12/00

5/00

Ability to Detect Change

• New 

Eolian erosion
Ability to Detect Change

• 78 sites with t• 128 NAU ma• Remote sensi• Alluvial terra• Geomorphic mand Potochnik)• Eolian transpo
Ability to Detect Change

• 10 sites with cross-sections 
Where are we Monitorin

•Area of Potential Effect 256,000 cfs. Most sitlower mesquite zone 100,000 to 125,000 cfs•Of the 438 sites recorded in 1990-91, 165 are monitored
Results of Core Monitor

Core monitoring has resulted in a 38% reductmonitored allowing us to focus on the most enproperties1992 -- 438 sites1995 -- 336 sites (as identified in the FEIS)1999 -- 264 sites2001 -- 190 sites2002 -- 165 sites

0

50

100150200250300350400450
Types of Impacts: Nonrecreational vs. Re

(1994-2002)

Nonrecreational 56% Recreat

Surface erosion Social tGullies CollectiArroyos CriminaBank slump On-site Side canyon erosionEolian erosion/deposition

River-based drainage

Col
Protection and Preservation A

•Potential Remedial Actions

*redirect or remove existing trails

develop for public interpretation

*close site to public

take no action based on traditional cul

*construct checkdams*vegetate or revegetate areas*stabilize banks wit rock armor or simil

stabilize structures

*collect artifacts*conduct subsurface testing and/or part

conduct complete data recovery

•Consultation Process
Management Actions

50 sites 

29 sites

Checkdam

Trailwork
Legal Responsibilities

•National Historic Preservation Act of 1966, as •National Environmental Policy Act of 1969•Grand Canyon Protection Act of 1992Grand Canyon Protection Act of 1992Sec. 1802. (a) The Secretary shall operate Glen Csuch a manner as to protect, mitigate adverse imimprove the values for which Grand Canyon NaGlen Canyon National Recreation Area were estincluding, but not limited to natural and cultura

visitor use.
Grand Canyon Protection Act of 1992 contin

Sec. 1805. (a)IN GENERAL. -- The Secretary shall establish implement long-term monitoring programs athat will ensure that Glen Canyon Dam is operaconsistent with that of section 1802.RESEARCH. -- Long-term monitoring of Glen shall include any necessary research and studies the effect of the Secretary’s actions under sectionatural, recreational, and cultural resources of 

National Park and Glen Canyon National Recre
•Final Environmental Impact Statement for th

Glen Canyon Dam, 1995•Record of Decision (Environmental CommitmRecord of Decision2. Monitoring and Protection of Cultural Re...Reclamation and the National Park Service, iwith Native American Tribes, will develop and long-term monitoring program for these sites. Amitigation will be carried out according to a proagreement written in compliance with the NatioPreservation Act.