Bioswale Filters Parking Lot Run-off for MS4 Compliance

Permeable Stabilized Crusher fine Running Path

Long Mow for Less Water Use and Maintenance: 38% Irrigation Reduction

Entrance Bridgeand Overflow Short Mow for Playability

Educational Rain Pavilionfor Monitoring and Weather Data

50,000 Gallon Cisterns to Supplement Bioswale Irrigation:Reduces Portable Water Use Departmental

MonitoringStudy Piers

Native Riparian Vegetation for Threatened Species Habitat

View ACentral Ave.

Section A

1”=4’ 1”=4’

1”=4’ 1”=4’

1”=4’1”=4’

3” Stabilized Crusher�neShrubBuffer

BioswaleTotal 18’

6” Concrete Sidewalk

Redondo Dr.

6’

6” Concrete CurbCentral Blvd. ‘A’ Parking LotTree Trench

6’ 40’ 14’

5” Mulch

18” Gravel Base

Uncompacted Soil

2’

ShrubBuffer

2’ 10’ 28’

6” Curb6” Curb

Long Mow-4”0.9% Slope-2”Drop

Short Mow-1.5-2” Field

18” Perforated PVC Pipe, Digitally Activated Valve, with fabric liner

24” HDPE Pipe

Single ‘C’ Inlet Per COA STD 2205

Single ‘C’ Inlet Per COA STD 2205

Double ‘C’ Inlet Per COA STD 2205 2% Slope2% Slope

Road Crown 12” Bio-Retention Soil

2% Slope 1.4% Slope

Flooding Downstream on Central Ave August 2, 2014 (Roberto E. Rosales/Albuquerque Journal)

Johnson gym

Expansion View ASection A

Redondo Dr.

‘A’ Parking Lot

DormitoriesJohnson gym

Johnson pool

1

2 8

9

10

11

1212

9

9

3

4

4

1315

14 16

5

7

6

d

JOHNSON FIELD (RE)CREATION INCORpORATINg gREEN INFRASTRuCTuRE AND HAbITAT INTO AN EDuCATIONAL RECREATION SpACE D14

Contaminated Rio Grande

Downtown Flooding

On-Campus FloodingImpervious Surfaces

UNM Watershed

Central Ave.

5198’

5182’

5109’

5171’

Site Plan Scale: 1”=150’

1. Initial planting filtration2. Main entrance bridge3. Bioswale filtration and riparian planting4. New 6’ sidewalk5. Educational rain pavilion6. Above ground educational cistern7. New hardscaped paths8. Foothills educational area9. Tree grove areas10. New bus bay for improve traffic circulation11. Added ADA entrance12. gateway pavilions13. Study piers14. Bioswale overflow to street15. Entrance bridge16. pedestrian table

Site Problems and Watershed Elevations Current Stormwater FlowContaminated and Excessive Run-off South of Field

Proposed Stormwater Flow

Existing and Proposed Parking Lot Run-off (cf)

Potable Water Use (acre-feet/year)38% Reduction in potable water use,

2-Year Storm (0.713in/1hr)

10-Year Storm (1.14in/1hr)

Existing Parking Lot Runoff (cu ft)

Proposed Parking Lot Runoff (cu ft)

Existing Conditions

Proposed Design

ear storm (0.713 in/1 hr) 10-year storm (1.14 in/ 1 hr)

26

70

20,000

15,000

10,000

5,000

0 0

10

20

30

40

50

60

Compliance Filtered Throughbioswale

while improving shade, habitat, air quality, safety, and accessibility

MS4 permit Run-off Reduced

Goals: Methods:1. Watershed based MS4 compliance2. Reduce flooding on campus and downstream3. Use less potable water for irrigation4. Create habitat for biodiversity

Capture infiltrate and filter stormwater run-off from parking lots in 475’ bioswale planted with native riparian vegetationNew sub-surface drip irrigation system Selection of native, drought adapted, and pollinator friendly plantsAdd 50,000 sq ft for habitat

Johnson Field11 Acres

Parking Lots 4.8 Acres

Johnson Gym

Central Ave. Central Ave.

2-year storm (0.713 in/ 10-year storm (1.14 in/ 100-year storm (2.05 in/ 1 hr)

Existing Parking Lot Runoff (cu ft) 11,398 18,224 32,771

Proposed Parking Lot Runoff (cu ft) 0 6551 21098

0

5,000

10,000

15,000

20,000

25,000

30,000

35,000

2-y 100-year storm (2.05 in/ 1 hr)

Existing and Proposed Runoff from Parking Lots

Existing Parking Lot Runoff (cu ft) Proposed Parking Lot Runoff (cu ft)

Potable WaNumber of Trees 

Existing Conditions 60

Proposed Design 38

0

10

20

30

40

50

60

70

Existing Conditions Proposed Design

Potable Water Use (Acre-feet/year)