final operational range assessment program phase i … · 2020. 5. 7. · dolores, colorado, in the...
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FINAL OPERATIONAL RANGE ASSESSMENT PROGRAM PHASE I QUALITATIVE ASSESSMENT REPORT SAN JUAN NATIONAL FOREST TRAINING AREA DOLORES, COLORADO
JUNE 2008 Prepared for: UNITED STATES ARMY CORPS OF ENGINEERS, BALTIMORE DISTRICT P.O. Box 1715 Baltimore, Maryland 21203
and
UNITED STATES ARMY ENVIRONMENTAL COMMAND Aberdeen Proving Ground, Maryland 21010 Prepared by: MALCOLM PIRNIE, INC. 640 Freedom Business Center Suite 310 King of Prussia, Pennsylvania 19406
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Operational Range Assessment Program, Phase I Qualitative Assessment Report June 2008 San Juan National Forest Training Area, Colorado
EXECUTIVE SUMMARY
The United States (U.S.) Army is conducting qualitative assessments at operational ranges to meet the requirements of Department of Defense policy and to support the U.S. Army Sustainable Range Program. The operational range qualitative assessment (hereinafter referred to as Phase I Assessment) is the first phase of the U.S. Army Operational Range Assessment Program. This Phase I Assessment evaluates the operational range area at the San Juan National Forest Training Area to assess whether further investigation is needed to determine if potential munitions constituents of concern (MCOC) are or could be migrating off-range at levels that may pose an unacceptable risk to human health or the environment. In conducting the Phase I Assessment, MCOC sources, potential off-range migration pathways, and potential off-range human and ecological receptors are evaluated as appropriate. The San Juan National Forest Training Area encompasses approximately 633,011 acres in Montezuma County and Dolores County, Colorado. The training area is located just north of Dolores, Colorado, in the Dolores Ranger District of the San Juan National Forest. According to the Army Range Inventory Database-Geodatabase from 2005, one training and maneuver area encompassing 633,011 acres is present on the training area. There is no other than operational area at the training area. A review of available records and background data, as well as an interview with Colorado Army National Guard (COARNG) personnel, indicated that the range at the San Juan National Forest Training Area has never been used for training involving military munitions (live-fire or non-live-fire). The COARNG began using the San Juan National Forest Training Area in 2001. The current Special Use Permit between the COARNG and the U.S. Department of Agriculture Forest Service expires on 31 December 2016 (Forest Service, 2001). Training currently conducted at the San Juan National Forest Training Area is limited to common soldier skill training (i.e., land navigation, patrolling, and equipment training exercises). Because training activities do not involve, and historically have not involved, the use of military munitions, there are no potential sources of MCOC. Therefore, potential off-range migration pathways and potential off-range human and ecological receptors were not evaluated, and the range at the San Juan National Forest Training Area is categorized as Unlikely. Installations with operational ranges where no munitions or only small caliber blanks have been utilized are categorized as Unlikely. That is, based on a review of available information, there is sufficient evidence to show that due to the lack of munitions use there are no known releases or source-receptor interactions that could present an unacceptable risk to human health or the environment. Ranges categorized as Unlikely are required to be re-evaluated at least every five years. Re-evaluation may occur sooner if significant changes (e.g., change in range operations or site conditions, regulatory changes) occur that affect determinations made during this Phase I Assessment. Table ES-1 summarizes the Phase I Assessment findings.
Malcolm Pirnie, Inc. ES-1
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Operational Range Assessment Program, Phase I Qualitative Assessment Report June 2008 San Juan National Forest Training Area, Colorado
Table ES-1: Summary of Findings and Conclusions for the San Juan National Forest Training Area
Category
Total Number of Ranges and
Acreage
Source(s) Pathway(s)
Human and
Ecological Receptors
Conclusions
Unlikely
One operational range; 633,011 acres
No source—no current or historical use of live-fire military munitions
Not evaluated (no source identified)
Re-evaluate during the five-year review.
Malcolm Pirnie, Inc. ES-2
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Operational Range Assessment Program, Phase I Qualitative Assessment Report June 2008 San Juan National Forest Training Area, Colorado
Malcolm Pirnie, Inc. ii
ABBREVIATIONS/ACRONYMS ARID-GEO Army Range Inventory Database-Geodatabase COARNG Colorado Army National Guard CSM Conceptual Site Model DoD Department of Defense MCOC Munitions Constituents of Concern ORAP Operational Range Assessment Program U.S. United States USACE United States Army Corps of Engineers
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U T A HU T A H
SAN JUAN NATIONAL FOREST TRAINING AREANarraguinnepReservoir
GroundhogReservoir
SummitReservoir
C O L O R A D OC O L O R A D O ElectraLake
LemonReservoir
PriestLakes
D o l o r e sD o l o r e s
M o n t e z u m aM o n t e z u m aL a P l a t aL a P l a t a
S a n J u a nS a n J u a n
S a n M i g u e lS a n M i g u e l
S a nJ u a nS a nJ u a n
Animas R
iver
Mancos River
Dolores River
Hermos
a Cree
k
West Dolores River
Florida River
Plateau
Creek
Fish Creek
Junction Creek
Lime C
reek
Disappointment Creek
Lightner Creek
Plata River, La
East Manc
os River
Taylor Creek
Cherry
Creek
Mariano
Wash
Bear Creek
Red Creek
Barlow CreekHorse Creek
Wildcat Creek
Spring Creek
Lado, Rio
Navajo
Wash
Silver Creek
Willow Cr
eek
Mc Elmo Creek
West Mancos River
Fall Creek
Tenderfoot Creek
Dolore
s River £¤550
£¤10
£¤666
UV145
UV141
UV140
UV184
UV3
DurangoDurangoCortezCortez
Date: .................................. June 2008Prepared By: ........ Malcolm Pirnie, Inc.Prepared For: ...................... U.S. ArmyContract: ............. W912DR-05-D-0004
Data Sources:AEC, ARID-GEO, 2006ESRI, StreetMap USA, 2005
InstallationInstallation BoundaryOperational Area
HydrologyRiver/Stream (Perennial)Stream (Intermittent)Canal/DitchWater Body
TransportationHighwayMajor RoadLocal RoadRailroad
AdministrativeCounty BoundaryState BoundaryUrbanized Area
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0 5Miles
Operational Range Assessment ProgramPhase I Qualitative AssessmentSan Juan National Forest Training Area, COFigure 2-1General San Juan National Forest Training Area Location and Operational Range Area
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