Portfolio January 2024 by Eva Kahn

PORTFOLIO

EVA

KAHN

EDUCATION

MASTER OF LANDSCAPE ARCHITECTURE | UNIVERSITY OF OREGON | EXPECTED 2025

College of Design | School of Architecture & Environment Cultural Landscape Research Group BACHELORS IN PLANNING, PUBLIC POLICY, AND MANAGEMENT | UNIVERSITY OF OREGON

Robert D. Clark Honors College 4.00 GPA | Summa Cum Laude | Phi Alpha Alpha Honors Society Thesis: The Grove: A Case Study in the Success of Student Community Gardens Study Abroad: Sustainable Development in Latin America | Ecuador 2018

EXPERIENCE

GRADUATE STUDENT RESEARCH ASSISTANT

August 2022—Present

Fall 2015—Spring 2019

September 2023—Present

Cultural Landscape Research Group | University of Oregon STUDENT AMBASSADOR

School of Architecture & Environment | University of Oregon COMMUNITY ENGAGEMENT COORDINATOR

Oregon Food Bank | Americorps COMMUNITY GARDEN COORDINATOR

Student Sustainability Center | University of Oregon ACTIVE TRANSPORTATION INTERN

Safe Routes to School | Lane Council of Governments STUDENT RESEARCH ASSISTANT

Institute for a Sustainable Environment | University of Oregon NATURE GUIDE VOLUNTEER

June 2022—Present September 2019—June 2021 September 2017—July 2019 January 2019—June 2019 April 2017—May 2018 June 2017—August 2017

Mt. Pisgah Arboretum ENVIRONMENTAL EDUCATION INTERN

March 2017 —June 2017

School Garden Project of Lane County

SCHOLARSHIPS & AWARDS The Josephine Lumm Matsler ‘41, Endowed Scholarship Cameron & McCarthy Scholarship for Landscape Architecture CELA Student Award for Creative Scholarship, Honorable Mention University of Oregon Landscape Architecture Award Ford Family Foundation Graduate Award Rural Community Builder Award, Ford Family Foundation Americorps Education Award Ford Family Foundatoin Scholarship University of Oregon Summit Scholarship

2024 2023 2023 2022 2022 2021 2021 2015 2015

PUBLICATIONS Eugene’s Zinc Sink | CELA Student Award for Creative Scholarship, Honorable Mention Columbia Gorge Community Food Assessment | Oregon Food Bank A Case Study in the Success of Student Community Gardens | University of Oregon

2023 2021 2019

CONTENTS 1 | SWITCHING BACK THE BANKS LA 610: RECLAIMING THE UO CAMPUS RIVERFRONT, WINTER/SPRING 2023

2 | EUGENE’S ZINC SINK LA 610: EMERGENT URBAN NATURES, FALL 2022

In collaboration with Steven Garcia and Mattie Ecklund

3 | KESTREL HABITAT IN THE ASH FOREST LA 610: OVERLOOK FIELD SCHOOL, SUMMER 2023

In collaboration with Jenny Ginn and Mattie Ecklund

4 | LETITIA CARSON LEGACY PROJECT LA 589: LETITIA CARSON LEGACY PROJECT, FALL 2023

Studio in progress

5 | HAND MEDIA PERSONAL & SCHOOL ASSIGNMENTS

1| SWITCHING BACK THE BANKS LA 610: Relcaiming the UO Campus Riverfront

R I PA R I A N

A TIN

LE AB

Winter/Spring 2023

SWITCHING BACK THE BANKS ACCESS & RESTORATION ON THE WILLAMETTE RIVER

The University of Oregon riverfront has long been neglected. “Switching Back the Banks” provides students and local residents access to the water by regrading the site to reflect historical topography and restore the floodable riparian area. This project began with deep site research looking at historical land uses, vegetation, soil conditions, and plans from the University. Our site research revealed incredibly poor subgrade conditions due to dumping and previous industry. My design leans into current desired uses of the site (beach access) and incorporates ecological restoration into this degraded riparian landscape. 1_Riverfront terrace rendering

RECRE

DOWNTOWN VIEW

MILLRACE OUTFALL

RESTORED HABITAT

EVA KAHN

1| SWITCHING BACK THE BANKS LA 610: Relcaiming the UO Campus Riverfront

19 4 4

185 0

Winter/Spring 2023

Fan-delta alluvium soils present throughout the site

Kalapuya people lived on and stewarded the land for millenia, many people removed or killed by 1850

Road moves gravel trucks through site, further compacting

Eugene Sand & Gravel builds more industrial facilities on site

Following the flood of 1964, ﬁll is extended to riverbank using new formula with higher silt and sand content

19 6 5

Site graded with ﬁll in preparation for asphalt plant

1_ Historical interpretations of the site in section (above) 2_ Physical model of floodable terrace, photo by Awar Meman (right) 3_ Planting design sketch in process, photo by Awar Meman (right, lower)

Open riparian woodland forest bordered by upland prairie

Vegetation remains on riverbank

Riprap used to engineer river bank and protect property from flooding

1 2

408

WILLAMETTE RIVER

2.5%

413 BASALT TERRACE

2.5

SALIX LASIANDRA

CONCRETE STEPS

30' 1.7%

3.2%

422

ALNUS RHOMBIFOLIA; PLANTED IN VARYING GROUPS OF 2-4 TREES

3.2% BASALT BOULDER SEATING AREA

2.4

36' ACER MACROPHYLLUM

0.9%

432

SALTED FINISH CONCRETE PATH

6' PLANTING ZONE 1: FLOODABLE RIPARIAN

1.8%

430 PLANTING ZONE 2: RIPARIAN FOREST

PLANTING ZONE 3: UPPER TERRACE MIXED WOODLAND

ENLARGEMENT PLAN SCALE: 1" = 10'

EVA KAHN

1| SWITCHING BACK THE BANKS LA 610: Relcaiming the UO Campus Riverfront Winter/Spring 2023

SW I T C H I N G B AC K T H E B A NKS Restored habitat and access on the UO Riverfront

M AT E R I A L Basalt terracing & Plant palette

Circulation and viewshed connections nS ta

Downto

e Riv

m diu

Autz e

nt Park rfro

Millrace Outfall

UO Willamette River Natural Area Water Parks and open space University of Oregon

Fra n

klin

Blv

Wil

Millrac

Site boundary (Land Lab) Railroad tracks Shared-use path connecting campus to downtown

White Alder (Alnus rhombifolia)

Red Osier Dogwood (Cornus sericea)

Slough Sedge (Carex obnupta)

Leichtlin’s Cama

Tall Oregon Grape (Berberis aquifolium)

Mock Orange (Philadelphus lewisii)

Romer’s Fescue (Festuca Roemeri)

Bleeding Heart

Riverbank Lupine (Lupinus rivularis)

Douglas Aster (Aster subspicatum)

Sword Fern (Polystichum munitum)

Slender Foot Se

lam

e Cree

ette

Riv

Concept grading plan Current t ypical condition

Historic site conditions

Viewpoint View of river blocked in many locations

+408’ +413’

1944

1850

Shared-use path City of Eugene

1965

+422’ +432’

+419’

+428’ Invasive species Rubus armeniacus Robinia pseudoacacia

+430’

+419’

Beach access Steep & muddy banks Exposed concrete rubble

From time immemorial, bands of Kalapuya people lived in this area. The river was an essential cultural connector, food source, and much more. According to the 1850 USGS survey, the site was covered in riparian woodland with the river meandering farther north.

Throughout the early to mid century, Eugene Sand & Gravel pulled stone out of the river and up toward machinery on south side of site. The site housed an asphalt plant east of the Millrace Outfall. Quarrying continued until the 1960s.

Throughout the 20th century, vegetation continued to be removed and replaced with industrial fill and buildings, including the asphalt plant. The banks were hardened to protect the site from flooding. The university purchased the property and continued to use it as a dumping groud for various chemical and manufacturing waste.

+428’ +430’

Design concept development ACCESSIBLE & FLOODABLE ZONE

PUBLIC ACCESS TO RIVER EDGE

EXPANDED RIPARIAN HABITAT

Phenology test plots

Vegetation gradient

Continued ecological & design

1 2

experimentation at Land Lab

Anthropogenic fill: sand & gravel 0-16’ Seasonal flooding

Siltstone bedrock 16’-

Varies from 408-419’ seasonally

408

Encourage circulation and rest point at phenology test plots

Seasonally Typical water level floods to 419’ in springtime at 408’

WILLAMETTE RIVER

Circulation choice: switchbacks or steps down to the water

Willamette River Natural Area Plant Palette

413

Switchbank into Millrace outfall

River edge concept

2.5

30'

DOWNTOWN VIEW

L E R IPA RI

MILLRACE OUTFALL

R ER

ECRE

3.2%

A TI

2.4

36'

A N TIN G S

RI V

422

432 6'

E S T B AS

AL T Y

TH W

A B U N DA N

L D LIFE

H E A LT H

PAC

IFI

1.8%

EVA KAHN | SPRING 2023 FINAL REVIEW

1_ Concept poster (left) 2_ Schematic poster (middle) 3_ Details poster (right)

ENLARGEMENT PLAN SCALE: 1" = 10'

LS & P L A N S native plant ecotone

EVA KAHN

SEC T I ON S & D E TAI LS Riparian forest planting zone

as (Camassia leichtlinii)

Big Leaf Maple (Acer Macropyllum)

Nootka Rose (Rosa nutkana)

Red-flowering Current (Ribes Sanguineum)

(Dicentra trollifolium)

California Hazel (Corylus cornuta)

Sitka Willow (Salix sitchensis)

Red Columbine (Aquilegia formosa)

edge (Carex leptopoda)

Baby Blue Eyes (Nemophila menziesii)

Tall larkspur (Delphinium trollifolium)

Sitka Willow (Salix sitchensis)

DRAINAGE SWALE COLLECTS RUNOFF FROM ADJACENT SLOPE

Materials

New trees, 70-90% canopy Existing trees

1"-6"

1'-6"

STONE SEATING

CONCRETE PEDESTRIAN PATH

DRAINAGE SWALE COLLECTS RUNOFF FROM ADJACENT SLOPE

3 4" CRUSHED STONE

DRAINAGE PIPE

UNDISTURBED SUBGRADE OR COMPACTED FILL

Basalt seating at path convergence

1"-6"

Upper Terrace Mixed Woodland (430 - 434’) Tall Camas Douglas Aster California Hazel Roemer’s Fecue Red Columbine Pacific Serviceberry Nootka Rose Big Leaf Maple Baby Blue Eyes

3 BASALT SPLIT FACE

BASALT STONE

4 DRAINAGE SWALE 1 RIPARIAN AREA SECTION

CONCR PATH

SCALE: 1" = 1'-0"

SCALE: 3/16" = 1'

121" Ø STL POST, 2" CLEAR FROM EDGE OF CONCRETE

Enlargement study area

Salted finish concrete (slip resistant paths)

1'-6"

Low-lying seasonally wet areas

Riparian Forest (419’ - 430’) Nootka rose Bleeding heart Sword fern Red flowering currant Slender foot sedge White alder Big leaf maple Riverbank lupine Mock orange Tall larkspur White alder Big Leaf Maple Roemer’s Fescue

Floodable Riparian Forest (below 419’) Red-osier dogwood Slough sedge Pacific willow White alder

3 4" CRUS

Boulder terracing along water edge

DRAINA

1 2"

CORE DRILL 2" Ø HOLE, SET POSTS W/ NON-SHRINK WATERPROOF GROUT, CROWN GROUT TO FILL & SEAL POST HOLES, FORM 41" WASH

1'-0"

UNDIST SUBGR COMPA FILL

170° 3' 3"

MULCH PLANTING SOIL CONCRETE PEDESTRIAN PATH 3 4" CRUSHED STONE

2.5%

121" Ø STL POST

DRAINAGE SWALE SCALE: 1" = 1'-0"

ADJACENT PAVING

30"

SOIL LINER

BASALT TERRACE

UNDISTURBED SUBGRADE OR COMPACTED FILL

SALIX LASIANDRA

6'-0"

8'-0"

1'-0" CONCRETE STEPS

PEDESTRIAN PATH SCALE: 1" = 1'-0"

1.7%

MULCH PLANTING SOIL CONCRETE PEDESTRIAN PATH 3 4" CRUSHED STONE

3.2%

ALNUS RHOMBIFOLIA; PLANTED IN VARYING GROUPS OF 2-4 TREES

SOIL LINER DRAINAGE SWALE COLLECTS RUNOFF FROM ADJACENT SLOPE

1' 4" - 1' 6" 6"

1'-6"

PLANTING ZONE 1: FLOODABLE RIPARIAN

UNDISTURBED SUBGRADE OR COMPACTED FILL

3'-6"

HANDRAIL

UNDISTURBED SUBGRADE OR COMPACTED FILL

6'-0"

PEDESTRIAN PATH SCALE: 1" = 1'-0"

SCALE: 1" = 1'-0"

BASALT SPLIT FACE STONE SEATING

BASALT TERRACE SCALE: 1" = 1'-0"

CONCRETE PEDESTRIAN PATH 3 4" CRUSHED STONE

430

1"-6"

SALTED FINISH CONCRETE PATH

1'-6"

BASALT SPLIT FACE STONE

DRAINAGE PIPE

3 4" CRUSHED STONE SOIL LINER

PLANTING ZONE 2: RIPARIAN FOREST

PLANTING ZONE 3: UPPER TERRACE MIXED WOODLAND

UNDISTURBED SUBGRADE OR COMPACTED FILL 1'-6"

2' 6" - 3'

SLOPE3'VARIES 3:1 TO 4:1

EVA KAHN | SPRING 2023 FINAL REVIEW

MULCH

DRAINAGE SWALE

PLANTING SOIL

SCALE: 1" = 1'-0"

UNDISTURBED SUBGRADE OR COMPACTED FILL

3'-6"

BASALT TERRACE SCALE: 1" = 1'-0"

EVA KAHN | SPRING 2023 FINAL REVIEW

SOIL LINER

SLOPED PLANTING AREA

SLOPE VARIES 3:1 TO 4:1

SCALE: 1" = 1'-0"

MULCH PLANTING SOIL CONCRETE PEDESTRIAN PATH 3 4" CRUSHED STONE

UNDISTURBED SUBGRADE OR COMPACTED FILL, COMPACTED IN LIFTS

2' 6" - 3'

0.9%

BASALT SPLIT FACE STONE 3 4" CRUSHED STONE SOIL LINER

ACER MACROPHYLLUM

1'-0"

1' 4" - 1' 6"

BASALT BOULDER SEATING AREA

MULCH PLANTING SOIL

SOIL LINER

1'-0"

PEDESTRIAN PATH SCALE: 1" = 1'-0"

6'-0"

UNDISTURBED SUBGRADE OR COMPACTED FILL

SOIL LINER UNDISTURBED SUBGRADE OR COMPACTED FILL, COMPACTED IN LIFTS

2 | EUGENE’S ZINC SINK LA 610: Emergent Urban Natures Fall 2022

1 mi

EUGENE’S ZINC SINK

DESIGNING FOR NON-POINT SOURCE POLLUTION

The Amazon Creek collects run-off from all of South and Southwest Eugene. For years, water quality has been improving in the creek, but zinc levels continue to increase. Zinc settles at the bottom of waterways and bioaccumulates in aquatic life. We conducted a spatial analysis of pollution sources based on the three primary contributors: runoff from residential areas, roads, and industrial sites. Then, we created a master plan for responding to zinc pollution based on our spatial analysis. We developed implementation strategies to educate the community about stormwater pollution, stop zinc runoff at its source, and treat runoff before it enters the creek. 1_ Zinc source analysis across Eugene stormwater basin 2_ Source analyses per stormwater subbasin (right)

2 mi

Number of Industrial Sites

Streets Concentraion of Low-Density Housing

RESIDENTIAL POLLUTION SOURCES (LOW DENSITY RESI-

VEHICULAR POLLUTION SOURCES

INDUSTRIAL POLLUTION SOURCES

COMBINED

EVA KAHN

2 | EUGENE’S ZINC SINK LA 610: Emergent Urban Natures Fall 2022

Runoff from zinc-based de-mossers on shingled rooﬁng

Runoff from zinc-based chemical power-washing

Runoff from galvanized metal products like siding and rooﬁng on industrial sites

Runoff from vehicular wear from brakes, exhaust, and tires

Silver birch (Betula pendula) stores zinc in leaves, stem, trunk and bark

Surface water runs off into vegetated stormwater infrastructure

Plant material is harvested and incinerated

Stormwater flows into the Amazon Creek Zinc particles in soil Soil underneath vegetation recharges groundwater before re-entering the surface water system 1_ Zinc runoff process (top) 2_ Phytoremediation process (lower) 3_ Amazon Creek Drainage Basin master plan (right)

RAIN GARDENS IN PARKS

SWALES ON VACANT LAND

SWALES ON MAJOR ROADS

PLANTERS IN PARKING LOTS

EVA KAHN

2 | EUGENE’S ZINC SINK LA 610: Emergent Urban Natures Fall 2022

ZINC IN THE AMAZON CREEK

ZINC RUNOFF PROCESS

ANALYZING ZINC POLLUTION ACROSS EUGENE’S STORMWATER BASINS

Runoff from zinc-based de-mossers on shingled roofing Runoff from galvanized metal products like siding, roofing, and fences on industrial sites

Runoff from zinc-based chemical power-washing Runoff from vehicular wear from brakes, exhaust, and tires

Water quality in Eugene has improved over the last 20 years, but zinc remains a key pollutant. Zinc is transported through stormwater runoff into waterways. Studies show that there are three main sources of zinc pollution: de-mossers used in lowdensity residential areas, anti-erosion coatings on galvanized metal in industrial areas, and vehicular byproducts like tire and brake wear on roadways. In a study completed last year, researchers found that the Amazon Creek has the highest zinc levels in Eugene. Water samples from Amazon Creek have shown that zinc levels exceed environmental standards. As a heavy metal, zinc persists indefinitely in the environment, settles at the bottom of waterways, and bio-accumulates in aquatic and terrestrial animal life. While zinc is necessary to human, plant, and animal life, excess Zinc poses negative environmental consequences. The impacts of excess zinc include the inhibition of plants’ ability to absorb other essential nutrients and reduces the survival of invertebrates. Even trace amounts of zinc impact fishes’ sense of smell, disrupting their ability to feed and mate. However, known zinc levels do not pose risk to human health. Our spatial analysis of zinc pollution sources shows that zinc pollution is diffused across the entire Eugene area, with higher concentrations in the Amazon stormwater drainage basin.

STORMWATER INFRASTRUCTURE PHYTOREMEDIATION PROCESS

Surface water runs off into vegetated stormwater infrastructure

Plant material is harvested incinerated

Zinc particles in soil

IMPACTS ON AQUATIC LIFE

Streamside parks provide some permeable surface

POLLUTION SOURCE ANALYSIS

Gill tissue disruption in species such as Northern Pike Minnow and Sculpin

Negatively impacts sense of smell for fish, reducing ability to find food and mate

Existing West Eugene wetlands provide some water quality remediation

Reduces lifespan of invertebrates

Silver birch (Betula pendula) stores zinc in leaves, stem, trunk and bark

Soil underneath vegetation recharges groundwater before re-entering the surface water system

Vegetation uptakes Zinc and removes it from the water system

CRITICAL STORMWATER INFRASTRUCTURE SUBBASINS

Inhibits plant nutrient uptake

Zinc accumulation in the creek

Number of Industrial Sites

Streets Number of Low Density Residential Sites per Subbasin

Master plan sub-basins join existing green infrastructure (parks and open space) Royal Ave Testing Site (Downstream)

ZINC POLLUTION SOURCES 25%

INDUSTRIAL

35%

VEHICULAR RUN-OFF

40%

RESIDENTIAL RUN-OFF

ZINC CONCENTRATION OVER TIME

Amazon Creek Headwaters

Micrograms/Litre

29th Ave Testing Site (Upstream)

EDUCATION AND REMEDIATION STRATEGY

Amazon Creek at Royal Avenue (downstream)

Industrial sites cluster along rail road lines in Northwest and West Eugene

2014

2018

Education Industrial runoff

Remediation Improved water quality

Residential runoff

Amazon Creek at 29th Avenue (upstream)

N Sub-basins with low density residential sites cluster in South, Northwest, and North Eugene

2022

Year

ZINC SOURCES PER STORMWATER SUB-BASIN

Vehicular runoff SWALES ON VACANT LAND

MASTER PLAN SUB-BASIN SELECTION PROCESS

Sub-basins with vacant land

LOW DENSITY RESIDENTIAL LOTS PER SUB-BASIN

STREETS PER SUB-BASIN

1_ Spatial analysis poster (right) 2_ Master plan poster (middle) 3_ Implementation strategy poster (left) *Poster design in collaboration with Mattie Ecklund and Steven Garcia

INDUSTRIAL SITES PER SUB-BASIN

Sub-basins with vacan land and parks

EDUCATION AND REMEDIATION ACROSS AMAZON STORMWATER DRAINAGE BASIN

Master plan sub-basins were selected by analyzing the overlap of available land. Rather than diffusing the infrastructure across the entire sub-basin, this plan strategically catches stormwater at the last moment before it enters the creek. To address industrial runoff, parks will be redesigned to include rain gardens along the creek and vacant land will be turned into bioswales. To address residential runoff, an incentive program will be implemented for residents to add rain gardens to their yards. Educational signage will be placed at the rain gardens in the parks to raise awareness about zinc pollution. Stormwater planters will be added to commercial parking lots to address vehicular runoff. Major intersections, where space allows, will be redesigned as roundabouts with bio-swales in the center. In addition to catching runoff from roads, roundabouts will help lower overall zinc pollution by reducing the amount of brake wear on roads. Phytoremediating species in the plantings will uptake zinc and store it in their biomass.

d and

MASTER PLAN SUB-BASIN PROTOTYPE

ZINC MASTER PLAN

Stormwater flows into the Amazon Creek

AVAILABLE LAND OVERLAP

SWALES AND PLANTERS ON MAJOR ROADS

PLANTERS IN COMMERCIAL PARKING LOTS

Sizing factor: 3% Facility size: 2,000 sqft.

Sizing factor: 6% Facility size: 2,000 sqft.

Bertelsen Nature Park

Total impervious surface: 69.58 acres or 44.70%

SWALES IN VACANT LAND

Sizing factor: 6% Facility size: 2,000 sqft.

RESIDENTIAL RAIN GARDENS

RAIN GARDENS IN PARKS

Sizing factor: 5% Facility size: 85 sqft. per residence

Sizing factor: 5% Facility size: 3.36 acres

MAJOR ROADS

EVA KAHN

IMPLEMENTATION STRATEGIES RESIDENTIAL, EDUCATIONAL, AND INFRASTRUCTURE SOLUTIONS

The master plan will be implemented as a stormwater management corridor with a focus on infrastructure in the critical sub-basins along the creek. The sizing of remediation facilities will depend on the impervious surface in each sub-basin. The City of Eugene Stormwater Management Plan describes facility “sizing factors” for a variety of facility types, including rain gardens, swales, and planters. For example, the sub-basins highlighted below (AMBT 010 and AMBT 030) have a total impervious surface area of 69.58 acres. The combined stormwater management facilities along major roads, in commercial parking lots, in parks, and vacant lots should be designed to accommodate runoff from the entire impervious area of the sub-basin. This subbasin example requires approximately 3.5 acres of managed runoff. The residential incentive program will be applied across the Amazon Creek basin as well, with a focus on addressing runoff in low-density residential areas. Property owners will be encouraged to disconnect their existing gutter lines from storm drains and treat roof runoff on-site with rain gardens.Finally, educational signage will be implemented at parks. As residents enjoy green space and view the new rain gardens, they will also be invited to learn about the stormwater process, the sources of zinc pollution, and its impact on aquatic life in the Amazon Creek. MASTER PLAN SUB-BASINS

PARKS Average surface area of a residential roof in US: 1,700 sqft.

VACANT LAND

COMMERICAL PARKING LOTS

RAIN GARDENS AND EDUCATIONAL SIGNAGE IN PARKS

Intervention sites are located in the most critical sub-basins along the creek

Disconnect gutters from stormdrains and filter water in residential rain gardens

AMAZON CREEK INTERVENTION CORRIDOR

Amazon Creek

PLANTERS IN PARKING LOTS WEST 11TH AVENUE

Commerical Parking Lots Major Streets Parks Parks Outside Master Plan Subbasins Vacant Lots Master Plan Subbasins

BERTELSEN NATURE PARK

Low Density Residential Areas

FERN RIDGE PATH

Master plan subbasins join existing parks as part of Eugene’s larger green infrastructure network

DISCONNECT GUTTERS FOR RESIDENTIAL RAIN GARDENS

Plantings will include phytoremediating species like willow, poplar, and birch Rain gardens along the banks of the creeks improve run-off water quality, beautify open areas and increase sense of community ownership

SWALES AND PLANTERS ON MAJOR ROADS

Sub-basins with vacant land, parks, and major roads

Sub-basins with vacant land, parks, major roads, and commercial parking lots along creek

SUB-BASINS AMBT 010 AND 030 Total impervious surface: 44.70% or 69.58 acres

INTEGRATING EDUCATION AND REMEDIATION IN PARKS Interpretive signage adjacent to the creek educates the community about the impacts of zincbased de-mossers

Human health and safety not impacted by zinc in soil

3 | KESTREL HABITAT IN THE ASH FOREST LA 610: Overlook Field School Summer 2023

1,500 snags are in the ash forest today

Only 4 habitat snags are needed per acre

Thinned dead wood to be repurposed across property

KESTREL HABITAT IN THE ASH FOREST USING DEAD ASH WOOD FOR TRANSPECIES DESIGN

The American kestrel is declining in the Northeastern United States. Meanwhile, the Emerald Ash Borer has swept through and devastated our forests. This project analyzes the potential for recycling dead ash wood for multispecies habitat with a focus on the American kestrel. We propose a habitat dispersal and enhancement plan that utilizes remnant ash material. The snag prototype and habitat dispersal plan highlight the utility of computational design, drone imagery, and photogrammetry in ecological design. We moved our designed kestrel habitat snag through several model iterations before erecting a 1:1 prototype on site. 1_ Ash forest management procession 2_ Kestrel hunting corridors in the ash forest (right)

Ash forest

0-15% slopes (required for trail maintenance)

>15% slope (retain current condition)

hunting corridor & maintenance pathway

remaining snags at 4 per acre

existing snags

site line

brush pile mowed area

RID

perching snag

IN NT

R CO

EVA KAHN

12’ wide corridor

3 | KESTREL HABITAT IN THE ASH FOREST LA 610: Overlook Field School Summer 2023

HISTORIC

Ash forest supports a mix of native wildlife, including raptors, bats, insects, and small birds and mammals.

CURRENT

Lonicera sempervirens

Invasive shrubs like Privet and Honeysuckle take over the midstory, crowding out the herbaceous layer. EAB infestation quickly decimates the Pennsylvania Ash forest in less than twenty years, causing sever canopy loss.

Forest patch is used as agricultural land by the Fuller family

Ash forest replaces abandoned agricultural land

Emerald Ash Borer ﬁrst detected in Lackawanna County

Early 1900s

1940s

2004

1_ Overlook ash forest timeline

FUTURE

EVA KAHN

Varying nest sizes and shapes will allow researchers to study the speciﬁc nest conditions kestrels desire most.

The ash forest is thinned to 4 snags per acre, Increased raptor presence decreases mammal population, leading to fewer vector opportunities for ticks

Banding helps researchers and Kestrel conservation groups study the habits of individual birds.

1,569 snags are currently in the

Natural ash snags begin to decay and fall

Natural standing Ash snags will last 10-20 years

Artiﬁcial snags persist as habitat

Cleared dead wood is repurposed throughout the

Artiﬁcial snag and mammal habitat installed

Kestrels choose nests

Nesting cavities drilled into natural ash snags

Potential partners, such as Pennsylvania DCNR, capture and band birds for ecological research

2023

Across the Overlook property, snag material can be used to create a network of ideal habitat for kestrels in open meadows and ﬁelds.

2023 and beyond

3 | KESTREL HABITAT IN THE ASH FOREST LA 610: Overlook Field School Summer 2023

1_ Photogrammetry of standing ash snag (above, left) 2_ Photogrammetry of 1:3 prototype (above, right) 3_ 1:5 dowel prototypes (left) 4_ 1:3 prototype assembly drawings (left, middle) 5_ 1:3 transpecies snag (left, far right)

EVA KAHN

Habitat wood: Fraxinus pennsylvanica

Habitat cavities Base column: Robinia pseudoacacia

3 | KESTREL HABITAT IN THE ASH FOREST LA 610: Overlook Field School Summer 2023

1_ Meadow snag install, photos by Ignacio Lopez Buson

Base column: Robinia pseudoacacia

American kestrel

EVA KAHN

4 | LETITIA CARSON LEGACY PROJECT LA 589: Letitia Carson Legacy Project Fall 2023, studio in progress

LETITIA

CARSO

SOAP CRE

1ST BLA CK LAN IN ORE D OWNER 1ST BLA G CK HO ON MESTE AD AC CLAIM T ANT

DONATION

LAND

320 ACRES GIVEN TO CARSON FAMILY

LETITIA CARSON LEGACY PROJECT HONORING THE FIRST BLACK LAND OWNER IN OREGON

The historic homestead of Letitia Carson, the ﬁrst Black woman landowner in Oregon, is currently owned by Oregon State University and operates as a research cattle ranch. The Letitia Carson Legacy Project, which is made up of leadership from OSU and local Blacklead organizations, is seeking help in designing a space on the historic homestead that is commemorative, community-oriented, and balances ecological restoration with current agricultural use. This studio has been the ﬁrst chance in my landscape architecture education to drive a project that has real clients with a real community and has the potential to lead to meaningful change. 1_ Site history collage

ORCHA RD RANCH IST ER PIONE ER MOTH CHEES ER EMAK BREWE ER R

Letitia and her children were displaced upon David Carson’s death. Letitia sued for compensation and won. Her lost homestead was never recovered by her family.

EEK

D CLAIM

LAND

& LEG ACY

Today th Letitia is land is ste Carso warde Orego n Legacy Pr d by the oje n State Unive ct and rsity. STORY LIVIN TELLING O LAND G HISTOR COM STEWARD Y MUN IT Y BU SHIP ILDIN HEALI G NG Visit h er Don ation L and C laim to : GATH ER LEARN and HON OR

EVA KAHN

4 | LETITIA CARSON LEGACY PROJECT LA 589: Letitia Carson Legacy Project Fall 2023, studio in progress

176

155

172

60 155

2205 A

137

176

Witzel-Ritner complex 30 to 60 percent slopes

155

Dixonville-Gellatly complex 12 to 30 percent slopes

Dixonville-Gellatly-Witham 2 to 12 percent slopes 2205 Conser silty clay loam A 0 to 3 percent slopes Witham silty clay loam 172 2 to 12 percent slopes

137

Waldo silty clay loam 0 to 3 percent slopes

Bashaw silty clay loam, nonflooded 0 to 3 percent slopes Abiqua silty clay loam 3 to 5 percent slopes

0’ 800’ 1” = 800’

Price-MacDunn-Ritner complex 30 to 60 percent slopes

June 21

8:30pm PDT

5:45 am PDT

Summer winds September 21

September 21

7pm PDT

7am PDT

5 December 21

December 21

4:15 pm PST

7:45am PST

Winter winds

McDonald Dunn Forest

Tampico Road (current access)

Carson Homestead Site

Soap Creek Road

Gate & current parking

McDonald Dunn Forest

1_ Site analysis 2_ Gathering space typologies for partners (right)

N 0’ 800’ 1” = 800’

EVA KAHN

5 | HAND DRAWING LA 564: Materials and Construction Fall 2023

HAND DRAWING DRAWING TO OBSERVE, LEARN, AND COMMUNICATE

Drawing is a skill that I highly value and am working on developing as part of my design process. I see hand drawing as a bridge between the real and imagined. I enjoy sketching while travelling as a way to understand my surroundings. Botanical sketching for coursework has helped me learn and familiarize myself with plant texture, color, and habit in an intimate way. Drawing helps me connect to the foundations of the landscape architecture discipline in a way that is intellectually and creatively satisfying. I believe it is also serves utility in creating more compelling, balanced, beautiful, and clear digital graphics and representations. 1_ Natural area vegetation map

EVA KAHN

5 | HAND DRAWING LA 564: Materials and Construction Fall 2023

1_ Acorn identiﬁcation drawings 2_Field sketches (right)

EVA KAHN