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1 21st St. and Northwestern Ave. streetscape Illustrative overview march 1, 2010 essence of the district loft buildings and granite pavers West 21st Street This booklet reflects the inial thoughts and ideas leading to the concept that was presented to the city for preliminary review. Property owners were convened for input and the resulng design has been re-submited to the city along with a cost esmate that responds to the city’s budget. There will be an addional outreach to property owners before final design that will occur in the coming weeks.

21st Street and Northwestern Ave. Streetscape

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(Kansas City, MO) Street Improvements in this KC historic district consisted of asphalt drive lanes and concrete sidewalks . . . except for these two streets. Design opporturnities were promoted to save the brownstone and incorporate a curbless environment into an alleyway with a swale to add greenery to the adjacent residents and business. The swale handles surface runoff of the alleyway street and is recharged by the condensate of surrounding buildings.

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21st St. and Northwestern Ave. streetscape Illustrative overview march 1, 2010

essence of the districtloft buildings and granite pavers

West 21st Street

This booklet refl ects the initi al thoughts and ideas leading to the concept that was presented to the city for preliminary review. Property owners were convened for input and the resulti ng design has been re-submited to the city along with a cost esti mate that responds to the city’s budget. There will be an additi onal outreach to property owners before fi nal design that will occur in the coming weeks.

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enriching promisewith new infrastructure

West 21st Street

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Northwestern Ave. streetscape concept

a curbless environmentand a swale

Northwestern Avenue

Northwestern Avenue

The above sketches reflect the conversation related to the street and swale design for Northwestern Avenue

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Northwestern Avenue and 21st Street streetscape aerial looking north

Northwestern Avenue Swale

Swale Detail - see page 5

Northwestern Avenue trench drainThe trench drain is located in the valley of the street and channels storm run-off to the swale in which it drains. During dry weather conditions, condensate from nearby buildings flow to the trench drain to provide mositure to the swale

Northwestern Street Section - see page 5

Re-used brownstone

Re-used brownstone

Streetscape Concepts

21st Street

The brownstone pavers on 21st street will be re-used. As a result of a reduced percentage of brick in the appropriate condition for re-use, the intersection of 21st and Northwestern will be concrete, which in effect creates two segments of re-used pavers. The parking lanes along 21st will be concrete forming two contained segements of 21st Street to hold the egdes of the relaid pavers and reducing the gross area to accommodate a reduced amount of re-usable paver.

Northwestern Avenue

Northwestern Avenue will feature a swale and curbless environment. The Northwestern Ave. swale will capture and clean run-off from the street and sidewalk surfaces for detention and assist in removing contaminatants and suspended solids. It will add delight and greenery for the residents in the adjacent Windows loft building and tenants in the West 300 building. This narrow 40’ wide street will have an 8’ concrete sidewalk and curb on the west side of the street. It will have a curbless concrete walkway on the east side that features a swale on the southern end and a storm water trench feature on the north end that will collect stormwater and building condensate and direct it to the swale. Once there, the water will infiltrate and be filtered with any remaining overlflow going into the city storm inlets located at the south end of the street on the north and east side of Northwestern. Northwestern will have two way traffic comprising of a 22’-0” asphalt driveway similar to other Crossroad streets.

West 21st Street

North

wes

tern

Ave

.

Light location detail - see page 5

Rebuilt Dock with new handicapped rampand stair

West 22nd Street

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Northwestern Avenue and 21st Street streetscape aerial looking north

Northwestern Street section

Swale Detail

Light Location Detail

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Pedestrian lighting - east sidewalk40’ spacing

The pedestrian lighting at a 40’ o.c. spacing helpsto achieve a continuity the side of the street where most people will walk and is somewhat disparate relative to a continuous streetwall. It is a place where most people pass through relative to the residential buildings and their openings along Northwestern.

1” = 30’-0” 3.1.2010

Northwestern Avenue streetscape SCHEME A - preferred scheme

Northwestern Avenue

West 22nd Street

West 21st S

treet

*

* Traffic lights would be located on the eastern side of street as shown in Scheme B

Lighting ScenariosThe following three schemes look at three lighting scenarios. Schemes A and B address pedestrian lighting on the west side of the street with spacing at 35’ oc and 40’ oc. Scheme C represents the plan forwarded to the city that shows pedestrian lighting on the east side of the street. Since we are dealing with a curbless environment on the east side of the street with narrower (5’-0”) circulation width along the swale we prefer the pedestrian lighting on the east side of the street with the 8’ sidewalk. The lighting will provide continuity to the side of the street with greater pedestrian traffic and provide continuity to a sidewalk interrupted by drives and curb cuts to residential and garage entrances along it’s length. We propose the traffic lights be located on the west side of the street.

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Pedestrian lighting - east sidewalk35’ spacing(traffic lighting shown at 100’ spacing

1” = 30’-0” 2.1.2010

Northwestern Avenue streetscape SCHEME B

Northwestern Avenue

West 22nd Street

West 21st S

treet

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Pedestrian lighting - west sidewalk40’ spacing(traffic lighting shown at 100’ spacing

1” = 30’-0” 2.1.2010

Northwestern Avenue streetscape SCHEME C

Northwestern Avenue

West 22nd Street

West 21st S

treet

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Pedestrian lighting spaced at 35’ o.c.

Pedestrian lighting spaced at 40’ o.c.

Pedestrian lighting spaced at 40’ o.c.

two pedestrian lights could be located here, one where the trash and generator are shown and the second between the first and second garage door to the south. We can feather the driveways to the street creating a curb situation on the first wide bay between the two gararage openings.

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Northwestern Avenue streetscape walking north from 22nd street

Scheme A - preferred scheme

Scheme B

Scheme C

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Windows Lofts

Swale

Northwestern Avenue streetscape walking north along swale

Scheme A - preferred scheme

Scheme B

Scheme C

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Scheme A - preferred scheme

Scheme B

Scheme C

Northwestern Avenue streetscape walking south on western sidewalk

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Northwestern Avenue streetscape walking south from 21st

Scheme A - preferred scheme

Scheme B

Scheme C

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Northwestern Avenue streetscape aerial looking north

Scheme A - preferred scheme

Scheme B

Scheme C