Yosemite Valley Plan SEIS, Volume II, Appendix E

Appendix E — Adverse Effects and Standard Mitigation Measures for Historic Properties

This table depicts actions adversely affecting historic sites, structures, and landscape elements, and the standard mitigating measures (as described in the Yosemite Programmatic Agreement, Appendix D) that the National Park Service proposes to use. Actions that do not adversely affect these historic properties are not listed here.

Alternative One
Description of Action	Adverse Effect	Standard Mitigation Measure(s)*
Superintendent’s House (Residence 1)
Superintendent’s House (Residence 1) managed through benign neglect	Eventual loss of Superintendent’s House (Residence 1) and garage; individually significant as well as contributing elements to the Yosemite Village Historic District	Salvage (recordation complete)
Orchards
Lamon Orchard managed through benign neglect; salvage cuttings and establish representative plants at appropriate facility outside of the park	Eventual loss of Lamon Orchard; a contributing element in the Yosemite Valley Cultural Landscape Historic District	Recordation, salvage cuttings, interpretation
Curry Orchard managed through benign neglect; salvage cuttings and establish representative plants at appropriate facility outside of the park	Eventual loss of Curry Orchard; a contributing element in the Yosemite Valley Cultural Landscape Historic District	Recordation, salvage cuttings, interpretation
Hutchings Orchard managed through benign neglect; salvage cuttings and establish representative plants at appropriate facility outside of the park	Eventual loss of Hutchings Orchard; a contributing element in Yosemite Village Historic District	Recordation, salvage cuttings, interpretation

Alternative Two
Description of Action	Adverse Effect	Standard Mitigation Measure(s)
Camp 4 (Sunnyside Campground)
Relocate five sites; relocate parking	Loss of contributing elements to Sunnyside Campground Historic Site	Recordation
Yosemite Falls Area
Realign and rehabilitate trails; rehabilitate, reconstruct, or remove bridges	Loss, rehabilitation, or reconstruction of up to seven footbridges and alteration of trail segments; contributing elements in the Yosemite Valley Cultural Landscape Historic District	Recordation
Yosemite Village
Relocate Superintendent’s House (Residence 1) and garage	Potential loss of National Register eligibility status of Superintendent’s House (Residence 1) and garage; individually significant as well as contributing structures in Yosemite Village Historic District	Interpretation (recordation complete)
*Note: This table depicts only standard mitigating measures as stipulated in the Yosemite Programmatic Agreement. Other mitigating measures, such as relocating historic structures, are described in the text of the document and are not represented here. Other actions, such as rehabilitating and adaptively reusing historic structures, do not result in adverse effects and therefore are not represented here.
Remove some existing facilities (if unfeasible to reuse) and redesign National Park Service (NPS) Maintenance area to accommodate some NPS district operations, Pacific Bell, shuttle maintenance, and overnight parking	Possible loss of up to 14 structures: NPS warehouse, Camp 1 structures, NPS Operations Building (Fort Yosemite), NPS maintenance shop buildings and garages; contributing elements in the Yosemite Valley Cultural Landscape Historic District	Recordation, salvage
Remove Concessioner Headquarters Building, Yosemite Village Garage, apartment, and shop buildings, and Hospital Row apartments.	Loss of up to eight structures including the Concessioner Headquarters, Village Garage complex and the road west of garage, and the Hospital Row apartments, contributing elements in the Yosemite Valley Cultural Landscape Historic District	Recordation, interpretation, salvage
The Ahwahnee
Remove Ahwahnee tennis courts and restore portion of Ahwahnee Meadow	Loss of contributing element (tennis courts) at The Ahwahnee historic property	Recordation, interpretation
Concessioner Stable
Remove concessioner stable, and associated structures; relocate some structures to McCauley Ranch, if feasible	Loss of 16 structures: stable buildings, housing, and associated facilities; contributing elements in Yosemite Valley Cultural Landscape Historic District	Recordation, salvage, interpretation
Curry Village
Remove 253 visitor tent cabins; construct new cabins with bathrooms	Loss of the majority of tent cabins and introduction of nonhistoric facilities in Camp Curry Historic District	Recordation, salvage, interpretation, National Register re-evaluation
Remove parking and historic fruit trees from Curry Orchard; remove the majority of comfort stations	Loss of Curry Orchard parking and Curry Orchard; loss of comfort stations; contributing elements in Yosemite Valley Cultural Landscape Historic District	Recordation, interpretation
Ecological Restoration, Including Bridge Removal
Restore Valley meadows, and riparian corridor within Merced River Protection Overlay at former campsites (Upper and Lower River Campgrounds), picnic area, and river corridor at Yosemite Lodge	Loss of the road bisecting Camps 7 and 15; loss of meadow ditches and river control structures such as wing dams, check dams, etc.; contributing elements in the Yosemite Valley Cultural Landscape Historic District	Recordation, interpretation
Remove Sugar Pine Bridge and, if necessary, Stoneman Bridge, and the raised causeway between Ahwahnee and Sugar Pine Bridges	Loss of Sugar Pine, and possibly, Stoneman Bridges (individually significant historic structures)	Salvage, interpretation, National Register re-evaluation (recordation complete)
Remove Happy Isles footbridge	Loss of Happy Isles footbridge (also known as the Old Happy Isles Bridge); a contributing element of the Yosemite Valley Cultural Landscape Historic District	Recordation, salvage, interpretation
Circulation Changes
Convert Southside Drive to two-way traffic (involves widening and minor realignment) between El Capitan Bridge and Curry Village	Modification of Southside Drive; a contributing circulation structure in the Yosemite Valley Cultural Landscape Historic District	Recordation
Orchards
Manage and maintain (but no replanting) Lamon Orchard; salvage cuttings and establish representative plants at appropriate facility outside of the park	Eventual loss of Lamon Orchard; a contributing element in Yosemite Valley Cultural Landscape Historic District	Recordation, salvage of cuttings, interpretation
Remove Curry Orchard; salvage cuttings and establish representative plants at appropriate facility outside of the park	Loss of Curry Orchard; a contributing element in Yosemite Valley Cultural Landscape Historic District	Recordation, salvage of cuttings, interpretation
Neither manage nor maintain Hutchings Orchard; salvage cuttings and establish representative plants at appropriate facility outside of the park	Eventual loss of Hutchings Orchard; a contributing element in Yosemite Village Historic District	Recordation, salvage of cuttings, interpretation
Cascades Area
Remove Cascades Diversion Dam, Screenhouse, and four Cascades residences	Loss of six structures; contributing elements in the Yosemite Hydroelectric Power Plant Historic Property	Recordation, salvage, National Register property re-evaluation

Alternative Three
Description of Action	Adverse Effect	Standard Mitigation Measure(s)
Camp 4 (Sunnyside Campground)
Relocate five sites; relocate parking; add 32 sites adjacent to Camp 4 (Sunnyside Campground)	Loss of contributing elements to Sunnyside Campground Historic Site; construction of nonhistoric features adjacent to historic site	Recordation, interpretation
Yosemite Falls Area
Realign and rehabilitate trails; rehabilitate, reconstruct, or remove bridges; relocate Clark Bench and Muir plaque	Relocation, rehabilitation, or loss of eight footbridges, alteration of trail segments, and relocation of small-scale features (bench and plaque); contributing elements in the Yosemite Valley Cultural Landscape Historic District	Recordation, salvage, interpretation
Yosemite Village
Remove Superintendent’s House (Residence 1) and garage	Loss of Superintendent’s House (Residence 1) and garage; individually significant as well as contributing elements in the Yosemite Village Historic District	Salvage (recordation complete)
Remove existing structures and redesign National Park Service (NPS) Maintenance area to accommodate some NPS district operations	Loss of up to 14 contributing structures: former NPS warehouse, Camp 1 structures, NPS Operations Building (Fort Yosemite), maintenance shop and garage buildings; contributing elements in the Yosemite Valley Cultural Landscape Historic District	Recordation, salvage
Construct new fire station in Yosemite Village Historic District housing area	Introduction of nonhistoric facility in Yosemite Village Historic District	Recordation
Remove Concessioner Headquarters Building; remove Ahwahnee Row housing, Y Apartments, Village Garage, associated apartment and shop buildings	Loss of 24 structures: Concessioner Headquarters; Village Garage; garage apartment and utility buildings; Ahwahnee Row houses, cottages and converted cabins, laundry room and garages; and Y Apartments; contributing elements in the Yosemite Valley Cultural Landscape District	Recordation, salvage, interpretation
The Ahwahnee
Remove Ahwahnee tennis courts and restore portion of Ahwahnee Meadow	Loss of tennis courts; a contributing element in The Ahwahnee historic property	Recordation, interpretation
Concessioner Stable
Remove concessioner stable and associated structures	Loss of 16 structures: concessioner stable buildings, housing, and associated structures; contributing elements in the Yosemite Valley Cultural Landscape Historic District	Recordation, salvage, interpretation
Curry Village
Remove 277 visitor tent cabins; remove Tresidder Residence, Cabin 90A/B, and Huff House; construct new cabins with bathrooms	Loss of the majority of tent cabins, Tresidder Residence, Huff House, and Cabin 90A/B; introduction of nonhistoric facilities in Camp Curry Historic District	Recordation, salvage, interpretation, National Register re-evaluation
Remove parking and fruit trees from Curry Orchard, and remove the majority of comfort stations	Loss of Curry Orchard and Curry Orchard parking, loss of comfort stations; contributing elements in Yosemite Valley Cultural Landscape Historic District	Recordation, interpretation
Ecological Restoration, Including Bridge And Orchard Removal
Restore Valley meadows, and riparian corridor within Merced River Protection Overlay at former Upper and Lower River Campgrounds, picnic area, and river corridor at Yosemite Lodge	Loss of the road bisecting Camps 7 and 15; loss of meadow ditches and river control structures such as wing dams, check dams, etc.; contributing elements in the Yosemite Valley Cultural Landscape Historic District	Recordation, interpretation
Remove Stoneman and Sugar Pine Bridges	Loss of Stoneman and Sugar Pine Bridges; individually significant historic structures	Salvage, interpretation, National Register re-evaluation (recordation complete)
Remove Housekeeping and Superintendent’s Bridges	Loss of Housekeeping and Superintendent’s Bridges; both contributing structures in the Yosemite Valley Cultural Landscape Historic District	Recordation, salvage, interpretation
Remove fruit trees from Hutchings Orchard	Loss of Hutchings Orchard; a contributing element in Yosemite Village Historic District	Recordation, salvage of cuttings, interpretation
Remove fruit trees from Lamon Orchard	Loss of Lamon Orchard; a contributing element in the Yosemite Valley Cultural Landscape Historic District	Recordation, salvage of cuttings, interpretation
Circulation Changes
Realign and widen portions of Southside Drive	Modification of Southside Drive; a contributing circulation structure in the Yosemite Valley Cultural Landscape Historic District	Recordation
Merced River Gorge
Remove Cascades Diversion Dam, Screenhouse, and four Cascades residences	Loss of six structures; contributing elements in the Yosemite Hydroelectric Power Plant historic property	Recordation, salvage, National Register re-evaluation

Alternative Four
Description of Action	Adverse Effect	Standard Mitigation Measure(s)
Camp 4 (Sunnyside Campground)
Remove five sites	Loss of contributing elements of Sunnyside Campground Historic Site	Recordation, interpretation, National Register re-evaluation
Yosemite Falls Area
Realign and rehabilitate trails; rehabilitate, reconstruct, or remove bridges; relocate Clark Bench and Muir plaque	Loss, relocation or rehabilitation of seven footbridges; relocation of Clark Bench and Muir plaque, and modification of some trail segments; contributing elements (structures and small-scale features) in the Yosemite Valley Cultural Landscape Historic District	Recordation, salvage
Yosemite Village
Remove Superintendent’s House (Residence 1) and garage	Loss of Superintendent’s House (Residence 1) and garage; individually significant as well as contributing elements in the Yosemite Village Historic District	Interpretation, (recordation complete)
Remove existing facilities and redesign National Park Service (NPS) Maintenance area to accommodate some NPS district operations	Loss of up to 13 contributing structures: former NPS warehouse, Camp 1 structures, maintenance shops, and garage buildings; contributing elements in the Yosemite Valley Cultural Landscape Historic District	Recordation, salvage
Construct new fire station in Yosemite Village Historic District housing area	Introduction of nonhistoric facility in Yosemite Village Historic District	Recordation
Remove Concessioner Headquarters Building; remove Ahwahnee Row housing; Y Apartments; Village Garage, associated shop buildings, and apartment	Loss of 24 structures: Concessioner Headquarters Building; Village Garage, garage apartment and shops, Ahwahnee Row houses, cottages and converted cabins, laundry room and garages; and Y Apartments; contributing elements in the Yosemite Valley Cultural Landscape Historic District	Recordation, salvage, interpretation
The Ahwahnee
Remove Ahwahnee tennis courts and restore portion of Ahwahnee Meadow	Loss of tennis courts; contributing element in The Ahwahnee historic property	Recordation, interpretation
Concessioner Stable
Remove Concessioner Stable and associated buildings	Loss of 16 structures; concessioner stable buildings, housing, and associated structures; contributing elements in the Yosemite Valley Cultural Landscape Historic District	Recordation, salvage, interpretation
Curry Village
Remove 277 tent cabins; remove Tresidder Residence, Huff House, and Cabin 90A/B; construction of new cabins with bathrooms	Loss of the majority of tent cabins; loss of Tresidder Residence, Huff House, and Cabin 90A/B; introduction of nonhistoric facilities in Camp Curry Historic District	Recordation, salvage, interpretation, National Register re-evaluation
Remove parking from Curry Orchard and remove the majority of comfort stations	Loss of Curry Orchard Parking, loss of comfort stations; contributing elements in Yosemite Valley Cultural Landscape Historic District	Recordation, interpretation
Ecological Restoration, Including Bridge Removal
Restore Valley meadows, and riparian corridor within Merced River Protection Overlay; restore riparian and upland vegetation at former Upper and Lower River Campgrounds and river corridor at Yosemite Lodge	Loss of the road bisecting Camps 7 and 15; loss of meadow ditches and river control structures such as wing dams, check dams, etc.; contributing elements in the Yosemite Valley Cultural Landscape Historic District	Recordation, interpretation
Remove Stoneman and Sugar Pine Bridges	Loss of Stoneman and Sugar Pine Bridges; individually significant historic structures	Salvage, interpretation, National Register re-evaluation (Recordation complete)
Remove Housekeeping and Superintendent’s Bridges	Loss of Housekeeping and Superintendent’s Bridges; contributing structures in the Yosemite Valley Cultural Landscape Historic District	Recordation, salvage, interpretation
Circulation Changes
Widen and convert Southside Drive to two-way traffic from El Capitan Bridge to Curry Village	Modification of Southside Drive; a contributing circulation structure in the Yosemite Valley Cultural Landscape Historic District	Recordation
Orchards
Manage Lamon Orchard through benign neglect; salvage cuttings and establish representative plants at appropriate facility outside of the park	Eventual loss of Lamon Orchard; a contributing element in Yosemite Valley Cultural Landscape Historic District	Recordation, salvage of cuttings, interpretation, National Register re-evaluation
Manage Curry Orchard through benign neglect; salvage cuttings and establish representative plants at appropriate facility outside of the park	Eventual loss of Curry Orchard; a contributing element in Yosemite Valley Cultural Landscape Historic District	Recordation, salvage of cuttings, interpretation
Manage Hutchings Orchard through benign neglect; salvage cuttings and establish representative plants at appropriate facility outside of the park	Eventual loss of Hutchings Orchard; a contributing element in Yosemite Village Historic District	Recordation, salvage of cuttings, interpretation
Merced River Gorge
Remove Cascades Diversion Dam, Screenhouse, and four Cascades residences	Loss of six structures; contributing elements in the Yosemite Hydroelectric Power Plant historic property	Recordation, salvage, National Register District re-evaluation

Alternative Five
Description of Action	Adverse Effect	Standard Mitigation Measure(s)
Camp 4 (Sunnyside Campground)
Relocate five campsites; construct employee housing adjacent to Camp 4.	Loss of contributing elements and introduction of major noncontributing structures at Sunnyside Campground Historic Site	Recordation, interpretation, National Register re-evaluation
Yosemite Falls Area
Realign and rehabilitate trails; rehabilitate, relocate, or remove bridges	Loss of three footbridges, rehabilitation of up to four footbridges, and modification of some trail segments; contributing elements in the Yosemite Valley Cultural Landscape Historic District	Recordation, salvage
Yosemite Village
Remove Superintendent’s House (Residence 1) and garage	Loss of Superintendent’s House (Residence 1) and garage; individually significant as well as contributing elements in the Yosemite Village Historic District	Salvage (recordation complete)
Remove existing facilities and redesign National Park Service (NPS) Maintenance area to accommodate NPS district operations, Pacific Bell, shuttle maintenance and overnight parking	Loss of up to 14 contributing structures (including former NPS warehouse, Camp 1 structures, NPS Operations Building [Fort Yosemite], maintenance shop buildings; contributing elements in the Yosemite Valley Cultural Landscape Historic District	Recordation, salvage
Remove Concessioner Headquarters Building; remove Ahwahnee Row houses, Y Apartments, Hospital Row apartments, Village Garage, associated shops, and apartment	Loss of 26 structures: Concessioner Headquarters Building, Village Garage, garage apartment and shop buildings, Ahwahnee Row houses, cottages and converted cabins, laundry room and garages, Hospital Row apartments, and Y Apartments; contributing elements in the Yosemite Valley Cultural Landscape Historic District	Recordation, salvage, interpretation
The Ahwahnee
Remove Ahwahnee tennis courts and restore portion of Ahwahnee Meadow	Loss of tennis courts; contributing element in The Ahwahnee historic property	Recordation, interpretation
Concessioner Stable
Remove concessioner stable and associated facilities	Loss of concessioner stable buildings, houses, and associated facilities; contributing elements in the Yosemite Valley Cultural Landscape Historic District	Recordation, salvage, interpretation
Curry Village
Remove 277 visitor tent cabins; remove Tresidder Residence, Huff House, and Cabin 90A/B; construct new cabins with bathrooms	Loss of the majority of tent cabins, Tresidder Residence, Huff House, and Cabin 90A/B; introduction of nonhistoric facilities in Camp Curry Historic District	Recordation, salvage, interpretation, National Register re-evaluation
Remove parking and orchard trees from Curry Orchard, and remove the majority of comfort stations	Loss of Curry Orchard Parking; loss of Curry Orchard; loss of comfort stations; contributing elements in Yosemite Valley Cultural Landscape Historic District	Recordation, salvage of cuttings, interpretation
Orchards
Manage and maintain Lamon Orchard (but no replanting); salvage cuttings and establish representative plants at appropriate facility outside of the park	Eventual loss of Lamon Orchard; a contributing element in Yosemite Valley Cultural Landscape Historic District	Recordation, salvage of cuttings, interpretation
Neither manage nor maintain Hutchings Orchard; salvage cuttings and establish representative plants at appropriate facility outside of the park	Eventual loss of Hutchings Orchard; a contributing element in Yosemite Village Historic District	Recordation, salvage of cuttings, interpretation
Remove Curry Orchard	Loss of Curry Orchard; a contributing element in Yosemite Valley Cultural Landscape Historic District	Recordation, salvage of cuttings, interpretation
Ecological Restoration, Including Bridge Removal
Restore Valley meadows, and riparian corridor within Merced River Protection Overlay at former campsites, picnic area, and river corridor at Yosemite Lodge	Loss of the road bisecting Camps 7 and 15; loss of meadow ditches and river control structures such as wing dams, check dams, etc.; contributing elements in the Yosemite Valley Cultural Landscape Historic District	Recordation, interpretation
Remove Ahwahnee and Sugar Pine Bridges	Loss of Ahwahnee and Sugar Pine Bridges; individually significant historic structures	Salvage, interpretation, National Register re-evaluation (recordation complete)