Analysis boards 2014 02 07

Page 1

720

825

755

750

760

730

815

0 71

5 71

740

0 73

72 5

0 71

725

72 5

725

72 5 725

725

725

725

5 72

725

725

WET AREA

72 5

730

72 5 76 0

770

0 73

73 0

76 5

785

77 0

76 5

725

715

710

725

730

72 5

710

715

720

77 0

0 73

730

725

72 5

730

735

730

730 730

735 72 5

B

735

0 73

5 72

725

725

725

75 0

725

725

74 5

74 0 73 5

730

725

705

5 72

730

72 5

725

73 5

0 73

725

EXISTING LEVEE 729’

0 74

5 72

725

735

5 72

730

730

735

5 73

705

5 72

730

735

730

73 5

730

72 5

725

735

730

72 5

5 72

5 72

72 5

73 0

72 5

30’

C

157’ min.

TIME CHECK NEIGHBORHOOD

725

725

82’

L AVENUE

MIDWESTERN RAILROAD

RIVER FLUX + LEVEES

5 72

5 72

STRUCTURAL REQUIREMENTS IN NEW GREENWAY

725

725

5 72

725

Hazard Mitigation Grant Program (HMGP) - FEMA: GREENWAY AQUISTION AREA

725

730

725

725

735 730

0 73

72 5

c Rai

755

730

Pacifi

725

77 5

730

ilroad

ilroad

ilroad

770

ic Ra Pacif

ic Ra Pacif

ic Ra Pacif

730

730

730

0 73

500 YR FLOOD 728.4’

740

73 0

Eligible Actities (HMGP):

735 725

73 0

730

HMGP 1904 1ST AVE WEST

• • • • • • • •

44 40

81

44

EXISTING GREEN SPACE

90

4980

730

0

600

5 76

745

0

0

RIVER ACCESS

427

0

71

0

60

20

720

400

74

77

40

5 72

730

72

50

CIRCULATION - AADT

5

750

71

0

735

0

72

20

750

FEMA/HUD ZONES

CDBG

NEIGHBORHOOD BLOCKS

0

730

720

825

200

0

730

300

760

5

755

750

750 5

71

780 765

745

0

785 790 775

0

82

4

30

0 74

800

71

29

86

815

0

73

755

5 74 5 73

835

73

725

300

730

770

820

830 825 805

800

300

730

0

725

416

785

0

5

72

90

5

5

720

80

72

730

750 740

0

73

300

71

0

0

71 5

71 0

0

720

73

5

72 5

5

5

72

5

725

72

72

71

0

71

1200

0

5 0 71

725

73 0

5 72

72

725

725

725

725

710

5

0

300

73

300

0 70 79

400

853

0 33

0 10 74

0 10 77 2704

100

200 600

400

2200

300

200

0

1640

300

1770

73

3290

0 80 63 50

5501500 0 0 5840

0 540

0 141

800

5 72

5 72

900

100

730 730

1630

1040

730

725

735 730

5

1 48

5 72

975

853

12000

230

1500

800

2609

300

1000

3831

250

00 863 0 70 79

300

300

33 0 10 74

0

2704

10 77

400

1770

20

0 80 63 50

5501500 0

80

00 584

0

00

0 141

RECREATION/PROGRAM + NATURE

LEVEE INSPIRATION

MEMORIALS

WATER INTERSECTIONS

FLOODABLE HOMES

HOUSE (1993) - RACHEL WHITEREAD

NIJMEGEN SIDE CHANNEL + ISLAND CREATION - RIVER WAAL

LUXEMBURG GARDENS - BALL COURT IN BOSQUE

KEAST PARK - SEAFORD, AUSTRALIA

STUTTGART MEMORIAL GARDEN (1992) - MICHAEL SINGER

VACLAV HAVEL’S MONUMENT - LIBOR SENEKEL

FLOATING HOMES - NETHERLANDS

MEMORIAL OF VICTIMS OF VIOLENCE - GAETA- SPRINGALL ARQUITECTOS LIMELIGHT - MEYER SILDERBERG LA

FLOODPLAIN PATHS AND HABITAT TIANJIN QIAOYUAN WETLAND PARK - TURENSCAPE

SEXSAN DESIGN - PJ8 SHOWHOUSE

G

THE MOSES BRIDGE - THE NETHERLANDS

QUAKER OATS

INDIVIDUAL LEVEE

Parlor City Storage

STRONG FISHING CULTURE

COMMERCIAL DEVELOPMENT WATERPLEIN - ROTTERDAM

Possible new casino

6

89

00

00 20

RIVERFRONT PARK CONNECTION

10 11

20

00

43

54

10 31 19

OLD CHICAGO AND NORTHWESTERN DOUBLE TRACK RAILROAD

10

570

2

1 53

0

0

39

65

0

HOUSE ON A HILL

TAYLOR NEIGHBORHOOD

54

540

50

24

0

100

100

FLOODABLE SPACES

F&M BANK

0

853

300

300

NEIGHBORHOOD ERASURE + ART

90

LAST OCCUPIED HOUSE BY RIVER

31

3290

FLOODING AND WATER LEVELS: In order to create a condition that is often wet it may be necessary to excavate some soil. Though the gage heights and contour levels do not have a direct correlation, I estimated the water level and associated contour for typical high and low seasonal variation to be between 718’ and 714’. The current land elevation is at 725’ which for most of the year will be dry, however with the new flood infrastructure it is anticipated that this area will be more likely to be wet due to the increased channalization and displacement of water.

38

90

200

50

35

1640

DOWNTOWN CEDAR RAPIDS

0 00 71

300 200

20

7200

G

1” = 200’

TIME CHECK NEIGHBORHOOD

41

2200

DECEMBER

HOMES BUILT UP STRUCTURALLY - MISSOURI

70

90

800

MAY’S ISLAND

90

31

600

NOVEMBER

Verdeck and Leonard

00

900

TAYLOR NEIGHBORHOOD

32

50

66

300

46

31

20

300

OCTOBER

Best Western

28

90

1630

SEPTEMBER

60

682

AUGUST

30’

870

0

0 660

72

725

200 500

1200

JULY

HUBBARD ICE HISTORY CENTER

00

00

22

0

0

0

JUNE

21

87

40

205

220

590

TYPICAL RESPONSE: The use of levees and floodwalls in response to large floods that were previously unprecedented is a typical trend in Cedar Rapids and other cities. After the flood of 1929 the city built a 2-3’ levee along 1st St NW which is now referred to as the Time Check Levee. In the early 60’s after the city was hit by another flood similar in size to that of 1929, they added an additional 3’ to the levee. The exact contents of the existing levee are not known. The US Army Corps of Engineers did a feasibility study before the 2008 flood looking at the Time Check levee and they determined that it did not qualify as a levee. One historian believes that the initial 1930’s levee was constructed of fill from the riverbed area and then construction debris from the 60’s urban renewal added to the structure.

80

300

HUBBARD ICE COMPLEX

0

37

30

1040

10

0

0

0

40 0

new amphitheater levee

0

157’ min.

FISHING BRIDGE

ACTIVE RECREATION

00

00

22

20

510

145

292

26

600

320

00

26

480

82’

Hubbard Industrial Park

00

39

00

G

45’

Hubbard Ice

00

60

83

0 80

4 28

00

71

LEVEE AND WATER LEVEL CONSIDERATIONS:

PRECEDENTS

DOWNTOWN CEDAR RAPIDS

DONALD JUDD -15 UNTITLED WORKS IN CONCRETE (1980 -1984)

25

31

50

660

300

90

00

0

70

79

58

00 155

MAY

RIVERFRONT PARK

Delong Development Co.

00 200

245

70

32

0

0

2910

21

2030

40

30

454

853 301

74

00

853

100

17

00

existing riverfront5700 1 parks

62

70

2

RIVERFRONT GREENWAY

396

0

0 11

46

85 4720

275

52

0

15

6

1790

0 60 68 0 1 37

0

60

740

396

50

0

30

4.7.1.3.1. Steel Roller Gates. Steel roller gates are utilized at street and railroad closures where adequate storage and level ground exists adjacent to the proposed floodwalls. Steel roller gates are basically a steel bulkhead placed on wheels that run along a track to open and close. Roller gate locations for the selected plan are shown on the attached plan plates. Each gate is physically stored in the open position on the floodside and upstream of each opening. Hydraulic forces during a flood serve to seal the gates tight once they have been closed. Photograph 2 shows a typical steel roller gate.

SPRING/SUMMER FLOODING

Santee James .

24

50 440 0

6000

4020

207

0 480

43

10

7900

4980

7200 750

682

300 725 725

725 725

725

0 73

400

600

600

300

5

77

5 73 725

725

735 730

725

416

735 725

300

1200 1230

e nu Av e H

80

90

2350

40 38 00 693 000 6

0

6200

8900

5700

CEDAR RAPIDS AND KINGSTON 1868

72

0

26

670

7900

60

30

76

644

1070

levee

8300

3 37

24

9600

301

300

13 23

4.7.1.3. Closure Structures. Fifteen individual closure structures are included in the selected plan. General location and type of closure is called out in the plan sheets attached with this report. The number and types of closure structures include seven steel roller gates, four steel swing gates and four removable floodwalls. Heights of the closure structures range from 6 to 19 feet. The closure gates serve locations identified in the City’s River Corridor Redevelopment Plan as critical traffic corridors, which include streets, railroad tracks, and trail systems.

F

NEIGHBORHOOD REDEVELOPMENT

25

89

853

15

853

300

TIME CHECK NEIGHBORHOOD

00

29

50

existing riverfront parks

F

157’ min.

Saddler Brothers LTD.

68

8

1473

300

SADLER’S POWER TRAIN - TRUCK REPAIR

new levee trail system floodplain/wetland habitat memorial/monument history/recreation/education center story recording location skate park/bmx park picnic areas boat access shelters playgrounds multipurpose fields levee crossings fishing spots ilroad

0 26

200

new dam

HUGE, NEW UTILITY LINES

MEMORIAL PARK

• • • • • • • • • • • • • •

ic Ra Pacif

32

100 Plaza/levee overlook

FLOODABLE HOMES

Sadler’s

0

5 11

1

APRIL

HIGHWAY I-380

30’

RIVERFRONT PARK

Union

ilroad

680

300

302

FLOODPLAIN/ HABITAT

ic Ra Pacif

306

8400

Cedar Valley/ Rompot

• Hubbard Ice - potential for retrofit, as it was built to hold ice and water, it also has historical significance and interesting character • Saddler’s Power Train Truck Repair appropriate for demolition • At least 5 homes, can remain • old Chicago and Northwestern RR bridge - potential for retrofit for pedestrian access and fishing • Best Western Hotel - potential to protect, but also could go • proposed Casino near I-380 would require levee modifications, which the city would consider

300

Union

400

0

300 0 77

5 76

725

730

725 730

75 0

725

5 74 0 74

73

5

730 0 73

730

300

755

0 78

77 5 780

870

71

00

660

0

0

500

600

400

770 5 76

1200 76 5

5 74

710

725

730

863

725

1230

725

5 72 725

725

725 730

00

5 725

725

725 725

725

5 72 73 0

300

725

725

72

72

5

730

72 5

735

72

5 72 0 73 735 735

5

735

73

5 73

320

0

0

4520

t

82’

Program Elements:

Structures in the Greenway

00

100

Proposed levee opening

F

45’

0

300 300

PROGRAM

00

nu e

30

0

680

0

300

STRUCTURAL + CULTURAL ELEMENTS

127

590

500

5900

00 67 0 15

Av e

50

86

27

00

0

MARCH

MONTH

1

57

0

216

FEBRUARY

0

0

70

ilroad

H

90

0

8 11

50 18

Restored River Edge

St

4

ic Ra Pacif

300

Czech Village

29

Union

3720

16 T

81

10

00

20

324

650

140

0

14100

The total amount of compacted clay fill needed for the levee is estimated to be 150,000 cubic yards. Fifty percent of the soil removed from the inspection trench is anticipated to be suitable clay fill material for use in the construction of the levee. The other 50 percent of soil removed from the inspection trench is anticipated to be unsuitable fill material. This material would be placed adjacent to or on top of the levee side slopes as extra material in order to lessen the steepness of the levee slope.

211

DOWNTOWN

253

110

12

00

1

I-380

39 0

• the current levee opening is located near the existing Time Check park where a new recreation center is being considered, this would be a good location as it is near busier roadways, there’s no need to have a vehicular opening in the neighborhood side. • pedestrian crossings of the levee need to be determined • connecting the Time Check Greenway to the other proposed greenways and existing parkspace as well as the new amphitheater levee • considerations for development along Ellis Avenue as it will likely become much busier, collecting traffic typically using 1st St NW.

3010

I-380

0

90

20

19

0

65

95

13100

200

2720

250

427

0 80

43

00

952

62

98

60 24

54

0

10

730

730

570

24

0

300

250

0

0

0

9100

5

4510

3890

165

90

0

5

73

0

1929 FLOOD - TIMECHECK NEIGHBORHOOD

60

72

730

730

30

REMAINING STRUCTURES AN ZONING IN THE PROPOSED GREENWAY

00

13

00

5400

4780

1100

800

300

31

17

Connection/Circulation Considerations:

5600

4630

725

1

3770 72

0

14

0

59

1

5

1929 FLOOD - 1ST AVENUE BRIDGE

10

48

72

730

73

120

0

740

0

48

73

00

250

8

34

230

60

158

16

730

735 745

00

5

5

730

77

40 10 11

0

59

200

72

74

730

0 73

10

0

0

0

730

0

90

20

00 20

10 31

0

241

112

5

74

0

Figure 75. Levee Section Looking Downstream

MINIMUM LEVEE REQUIREMENTS: The new Time Check levee will need to meet USACE standards and have a footprint of at least 82’ with 30’-45’ of easement on both sides. Sasaki showed an image of an extended levee that sloped gently from about 12’ to the river’s edge.

700’ JANUARY

0 65

0

5

284

44

31

54

9

25

0

10

0

0

73

0

300

75

890

34

73

100

5

0

14

425

00

0 68

0 10

396

0

0

7

00 197

725

730

775

220

40

600

0

5 73 730

72

725

73

725

730

72

5

219

174

725

725

76

295

3

200

“Gage 0” Datum: 700.47’ 44

00

205

0

26

5

0 72

725

CIRCULATION AND CONNECTIONS

5

38

90

510

39

0

590

714’ APP.

701’

50

00

00

7

480

0

00

AVERAGE SUMMER/SPRING 703’

702’

40

20

00

145

90

72

72

5

0 73

12 T

50

22 79

58

00 155

292

21

725

725

725

725

72

730

6TH Street

41

00

28

28

40

660

300

5

245

5

5

00

00

30

0

0

200

725

725

725

725

72

72

5

730

d Rd

20

66

7

703’

705’

46

90

20

50

60

30

454

853

72

2910

87

24

00 15

704’

718’ APP. The channelized concition creates a non-direct correlation between river stage and contour elevation.

707’ 706’

50

35

40

32

00

26

301

2030

AVERAGE SUMMER/SPRING 707’

80

74

10

62

70

5

1951 (17.22’)

70

90

0

70

00

2004 (18.30’)

708’

31

70

5

200 72

QUAKER OATS GRAIN ELEVATORS - 1941

1929 FLOOD

396

QUAKER OATS

32

50

17

1965 (718.51’)

709’

RIVERFRONT PARK

20

0

00

0

15

0 72 5

725 5 72

0

E

TIME CHECK NEIGHBORHOOD

VACANCIES

E

37

43

26

0

5700

73

227

5

5

1790

0

5

725

770

Edge woo

00

20

25

30

60

40

0 52

21

24

30 0 60 68 10 37

72

5

0

Severe disasters must be remembered in order to learn from them and safeguard against their recurrence (Pfister 2011). The memory of natural disasters is short lived. High water marks serve to remember the floods, but also become “expressions of institutional risk me.”

72

0

85

853

100

72

72

725

5

73

300

Riverfront Park

REMEMBRANCE

72 5

0

72

72

re e

Cities can be designed to live with periodic flooding as a way to develop resiliency to them (Liao 2012). The ability to adapt to flooding is dependent on flooding events that occur more frequently and at a scaleRight-of-way that is not catastrophic. Being able to develop resilience to large disturbances requires experiencing typical section of riverfront with extended parkland and learning from smaller 10 cedar Rapids Framework Plan disturbances, by letting some small floods in. Flooding itself becomes the agent for resilience to flooding.

0

725

1929 FLOOD - F AVENUE BRIDGE (NOW I-380)

New Dam

C

city park

72

5

5

2000

levee

65

71

5

157’ min.

90

Potential PLAY Location

New Bohemia

THEORETICAL FRAMEWORK greenway RESILIENCE

0 480

0

5

72

730 730

730

N

1000

60

1947 (718.23’)

1993 (719.83’)

710’

30’

CDBG

0

4720 396

5

725 72

5

5 72

725

730

73

TH

500

72

5

100

Wetland Park 16 Avenue

72

10

46

73

72

5

725

72

75

Taylor

0

705

72

5

730

740

e

740

5

725

207

71

5

e Av

670

0

705

72

5

725

77

Oak Hill Jackson

3 37

2350

40 38 00 693 000 6

50 440 0

6000

4020

0

72

735

770

May’s Island Plaza

nu

TH

7900

735

730

72

t

en Av

8

725

74

725

730

City Terrace

e re

Downtown

ue

5TH Avenue

0

72 5

725 5

730

5

735

St

RD

3

Riverfront Amphitheater

0

725

730

TH

Taylor Area

e Av

1070

73

0

The exact location of the West side levee is not yet determined. However, in the meantime the City of Cedar Rapids is beginning on the redevelopment of a series of greenways along the riverfront on the West side of the Cedar River.

8

e

nu

ST

1

89

5

5

Boat Dock

Potential PLAY location

15

72

73 5

6200

8900

725

0

72

73

730

735

Plaza/Levee Overlook

76

735

730

735

Greenway

F Avenue E Avenue

5

73

TIME CHECK GREENWAY Time Check

Great Lawn / Sports Recreation

9600

725

730

72

13

644

5

73

730

72 5

730

72

My project will focus on the Time Check Greenway project area and the neighborhood connection across the proposed levee system as well as the connection to the Riverfront Greenway.

O Avenue

8300

735

7900

72

Continuous Trail System

853

23

301

300

730

730

22

31

720

720

725

72

73 0

82’

25

710

715

10

5

730

200

Restored River Edge and River Recreation

853

300

735

Ellis Park

50 1473

300

0

735

72

725

00

83

0

725

725

SASAKI CITY MASTER PLAN FRAMEWORK

88

31

78

77

45’

25

0

5

725

730

400

90

0

5

77

73

72

725

5

38

730

29

200 100

715

725

730

0 73

730

73

E

ilroad

300

302

1961 (719.66’)

711’

ic Ra Pacif

0

785

730 72

0

00

0

780

73

68

1929 (720’)

712’

0

60

750

77

74

730

60

ADDITION TO TIME CHECK LEVEE - 1960’S

When the existing levee is removed, the existing landform will be more exposed to seasonal flooding, but in order to have water more often, excavation would be required.

717’

00

4520

730

730

12

00 11

5 11

100

785

8400

0

725

725

730

80

POST-2008 BUILDING UP

725’ TYP.

718’

HMGP

680

32

719’

D

1ST TIME CHECK LEVEE - 1930’S

EXISTING LAND ELEVATION

713’

Union

100

73

725

725

725

5 72

725

0

300

300

0 73

5

730

730

300

725

725 725

72

ilroad

250

306

5

725

ic Ra Pacif

5

76 0

725

Union

5

75

730

725

ilroad

72

725 0 72

5

72

ic Ra Pacif

725

72

5 72

Union

5

725 725

ilroad

725

725

72 5

ic Ra Pacif

5

730

72

730

Union

300

72

725

725

ilroad

3720

725

ilroad

725

250

725

740

730

ic Ra Pacif

725

ic Ra Pacif

5

725

Union

Union

300

5

QUAKER OATS

714’

725

0

725

725

72

200 72

720’

715’

5 72

725

73

730

D

TIME CHECK NEIGHBORHOOD

722’

716’

3010

5

725

City’s Plan:

1

724’

721’

QUAKER OATS

2720

4510

3890

730

PROJECT FOCUS

RR BRIDGE

725

735

72

CEDAR RAPIDS 1906

D

5

730

0

TIME CHECK NEIGHBORHOOD

720

770

775 780 785

72

5

200

71

10

300

5

730

73

98

5

72

50 YR FLOOD 722.4’

725

72

320

740

71 5

725

729’ TYP. The existing levee will protect to a lower river height when due to the new flood walls along the East side of the river.

723’

• Potential construction of structural flood management (levee) including levee slope, safety zone, relocation of streets, utilities, and infrastructure • Not all properties in this area will be affected.

75

73

760

5 74

810

100 YR FLOOD 724.4’

Community Development Block Grant (CDBG) - HUD: CONSTRUCTION/STUDY AREA

25

5

10

720

77

0

TOPOGRAPHY

38

740

72

property aquisition, demo, relocation structure elevation dry floodproofing historic structures minor localized flood reduction projects structural/non-structural retrofitting of existing buildings safe room construction infrastructure retrofit soil stabilization

EXISTING LEVEE

725’

HUBBARD ICE

ilroad

75 5

730

730

726’

0 72

730

0 73

ic Ra Pacif

775

725

728’ 727’

QUAKER OATS 5 72

730

Union

780

5 72

0 73

2008 (731.12’)

729’

5 72

72 5

0 73

735 745

731.12’

731’ 730’

5 72

730

74 0

725

0 73

76 5

2008 FLOOD 731.12’

5 74

78 0

5 73

lroad

Union

Union

Union

• HMGP is voluntary and there is no obligation to sell your home. • Any land purchased with HMGP funds must be restricted to open space, recreational, and wetlands management uses in perpetuity. 725

0 75

5 77

Union

72 5

PROPOSED LEVEE 734’ (+3’ freeboard)

732’

C

7

5 73 730

725

740 730

CEDAR RAPIDS AERIAL 1945

830

USACE

Cedar River Rapids, Iowa TYPCAL LEVEE Flood Cedar Risk Management Project Feasibility Study Report with Integrated Environmental Assessment

CONTOUR ELEVATION HEIGHT 733’

0 72

5 72

725

730

725

725

725

72 5

72 5

770

73

HISTORICAL FLOODING

FLOOD STAGE GAGE HEIGHT

5 72

0 73

725

DEMOLISHED HOUSE BY RIVER

725

POST-FLOOD (CURRENT) BUILDINGS

725

725

PRE-FLOOD BUILDINGS

735

CITY-OWNED PROPERTY

730

Three RFP’s are out for the Time Check Greenway, the Riverfront Greenway, and the Czech Village Greenway. The exact boundaries of each are not determined, however construction is planned to be completed between 2015 - 2020.

EXISTING LEVEE 729’

EXISTING LEVEE 729’

725

5 72

72 5

731.12’

45’

5 72

730 730

730

LAND USE - EXEMPT STATUS

731.12’

725

5 72

2008

NEW FLOOD PROTECTION

725 725

5 72

5 73

72 5

725 5 72

730

The project scope includes creating a master plan for the Cedar River’s western edge from the Time Check neighborhood’s northern edge at Penn Avenue to the newly constructed amphitheater levee. The master plan will show the location of the proposed levee, connections to existing green space and to the surrounding neighborhood as well as existing buildings to remain and greenway boundaries. Site design will focus greenway memorial within the erased portion of the Time Check Neighborhood between the proposed levee and the river.

C

72 5

0 72

725

5 72

5 72

5 71

725

730

730

The project scope includes creating a master plan for the Cedar River’s western edge from the Time Check neighborhood’s northern edge at Penn Avenue to the newly constructed amphitheater levee. The master plan will show the location of the proposed levee, connections to existing green space and to the surrounding neighborhood as well as existing buildings to remain and greenway boundaries. This master plan will be a more detailed modification to the larger city master plan prepared by Sasaki. Site design will focus greenway memorial within the erased portion of the Time Check Neighborhood between the proposed levee and the river.

EXISTING LEVEE 729’

5 72

730

71 0

SCOPE AND SITE BOUNDARY

PROPOSED LEVEE 737’

PROPOSED LEVEE 737’

0 73

730

725

500 yr

PROPOSED LEVEE 737’

73 0 0 73

PROPOSED LEVEE 737’

5 72

735

72 5

725

0 73

72 5

0 73

730

72 5

730

0 73

725

100 yr

730

725

719.83’

2008 FLOOD (731.12’)

MIDWESTERN RAILROAD

730

25 in/yr 27 in/yr 29 in/yr 31 in/yr 33 in/yr 35 in/yr 37 in/yr

100 YEAR FLOOD (724.4’)

730

735

2008 FLOOD

TIME CHECK NEIGHBORHOOD

SUMMER/SPRING TYP. LEVEL (707’)

73 5

72 5

725

730

SCOPE AND SITE BOUNDARY

1993 FLOOD

B

157’ min.

WINTER/FALL TYP. LEVEL (703’)

750

725

725

725

ilroad

ilroad

ilroad

ilroad

ilroad

ilroad

Precipitation in Iowa occurs mostly as rain, occurring largly during thunderstorms from April to September. Large scale flooding occurs as a result of rapid snowmelt or extended periods of thunderstorms.

5 72

ic Ra Pacif

ic Ra Pacif

ic Ra Pacif

ic Ra Pacif

ic Ra Pacif

ic Ra Pacif

open water wetlands forest grassland alfalfa/hay corn soybeans developed

LAST HOUSE BY RIVER

30’

Union

Union

Union

Union

Union

Union

Over 90% of the land cover in Iowa is dedicated to row crops, mostly corn and soy.

82’

725 735

73 0

Cedar Rapids sits at the bottom of the Middle Cedar Watershed and receives water from the entire upstream area. Upstream development patterns can affect flooding in the city.

45’

725

725

720

730

PROJECT BACKGROUND

B

78 0

77 5

725

0 73

730

TIME CHECK GREENWAY: LIVING IN THE FLOODPLAIN

0 77

5 73

730

The Flood of 2008 was unprecedented in Cedar Rapids, IA, reaching heights well beyond the 500-yr floodplain and affecting seven states across the Midwest. After having withstood the 1993 Midwest floods which set the previous benchmark at nearly 20’, the city of Cedar Rapids was considered unfloodable. However in 2008 waters reached over 31’ and covered nearly 14% of the city; it has often been termed Iowa’s Katrina. These unprecedented floods are expected to become more frequent and equally unpredictable with climate change, causing cities to change their policies and perceptions of what is normal regarding flooding. In Cedar Rapids new Federal Insurance Rate Maps have delineated a larger portion of the city into the 100-yr floodplain and the city is currently working to implement their approved Flood Management System which would protect the city to the 2008 flood levels. The system combines strategies of incorporating permanent and removable flood walls as well as widening the river bed and allowing the Cedar River to flow into a portion of its floodplain. The city’s master plan framework delineates a large portion on the west side of the river’s edge to create amenity and public space and to restore floodplain functionality to increase flood resilience. This effort requires buying out property along the river, mostly in the Time Check neighborhood. This area has been designated by FEMA to remain as open space in perpetuity and will become the new greenway. The buyout process is now complete, with the city having purchased 1,300 properties and having demolished over 1,700 buildings. In the Time Check neighborhood nearly 200 homes have been purchased but five families remain living in a neighborhood that has seen destruction from flooding, and the persistent removal of homes. The space is currently in a transitional state with few houses poking through a street grid reminiscent of what used to be a neighborhood but is increasingly already looking like parkland and will eventually be a wet area.

PROPOSED AND EXISTING LEVEES

780

725

730

0 77

74 5

730

730

ANNUAL PRECIPITATION

750

725

0 74

PROPOSED FLOOD INFRASTRUCTURE

730

EXISTING FLOOD INFRASTRUCTURE - 2008

725

EXISTING FLOOD INFRASTRUCTURE

76 5

725

725

72 5

785

725

SANITARY SEWERS

1” = 50’

A

5 75

725

0 72

0 73

5 72

730

725

725

STORM SEWERS

PENN AVENUE

5 72

730

725

725

725

5 72

FLOOD LEVELS

MIDWESTERN RAILROAD

725

725

725

725

72 5

725

725

WATERSHED CHARACTERISTICS

TIME CHECK NEIGHBORHOOD

5 72

725 72 5

5 72

POST-FLOOD RECONSTRUCTION

A

157’ min.

PROPOSED LEVEE

PROPOSED FLOODWALL 3’ - 20’ typ. protection to 734’

730

725

725

BOAT HOUSE COMMUNITY RE-ESTABLISHED POST-FLOOD

30’

EXISTING LANDFORM contour elevation 725’ typ.

15’ 15’

725

735

730

72 5

73 0 735

ad

725

730

735

5 72

82’

82’

720’

725

Railro

725

725 725

5 72

725

ic Pacif

725

725

72 5

45’

30’

712’

731’ TYP.

73 0

72 5

Union

730

15’

A

725

0 73

HARRISON CREEK

BOAT HOUSES CAUGHT AT RR BRIDGE

LAND COVER

72 5

710

72 5

735 730

725

707’

720

725

725

MIDDLE CEDAR WATERSHED

725

715

730

725

72 5

Evaluation of buildings to remain in the floodplain and how they could be resilient. Phasing: (1) streets/utilities removal, (2) greenway development, (3) new/old levee. Restoration of floodplain habitat and function, inclusion of wetlands. Education and interpretation regarding flooding and history. Consideration of connecting to the neighborhood across proposed levee. Daylighting creek from Harrison and consolidating sewers. Create fishing locations and more river access, especially across RR bridge. Incorporate skate park into levee system or flood mitigation. Memorialize the lost neighborhood and preserve historic structures. Create opportunities for reflection and contemplation. Accentuate and reveal natural river processes by marking flood datums, watermarks.

EXISTING LEVEE contour elevation 729’

12’

0 71

725

725

10’

EXISTING LEVEE

MIDWESTERN RAILROADS

72 5

765

745

785 790 775

0 71

5 71

725

0 73 5 72

DESIGN OBJECTIVES: • • • • • • • • • • •

• consolidation of storm/sanitary pipes to decrease punctures through levee • closure gates and pump stations for infrastructure near levee • potential to daylight creek from Harrison School • all structures in the “wet” area must be flood resilient, the city has requested that they be portable. • Even fences are not permitted as they would obstruct debris. • The construction of flood walls and levees along the river will increase the depth of water typically experienced. The existing Time Check levee would no longer protect to 20’ of river stage (100 yr flood) • The city plans to remove the exististing levee when the new levee is built.

5 72

5 72

725

5 72

0 73

Hyrdologic Considertions: 720

82 5 805

0 71

780 72 5

740

CEDAR RAPIDS 1875

0 74

835

5 74 5 73

800

RIVER + NEIGHBORHOOD

71 5

730

TIME CHECK GREENWAY WET CONDITIONS SECTION ANALYSIS

SECTION ANALYSIS

750

73 0

5 72

The people who want to remain could be an asset if they were interested in being an experimental community that lived on the river. Old historical buildings like Hubbard Ice, the RR and remnants of the existing neighborhood including houses, foundations and street grids could be used to recall the old neighborhood.

0 73

755

71 5

725

• Time Check traces its beginnings to the early 1870’s. • Early residents worked across the river at rail yards just north of downtown, and later worked at Quaker Oats. • The name “Time Check” evolved from the worker relationship with the railroad companies who were often short on payroll and would provide workers with post-dated checks, known in local parlance as time checks. • The stable workforce of the community attracted additional industry to the heart of the city. • The levee in the neighborhood was built in the 1930’s and later added to in the 1960’s in response to the floods of 1929 and 1961. • In 2008, the Time Check neighborhood was the first to be evacuated and the hardest hit by the flood.

0 73

725

730

770

820

830 5 82

Time Check History:

CEDAR RAPIDS, IOWA TIME CHECK GREENWAY

HYDROLOGY AND PROPOSED LEVEE CREATING NEW WET AREA

770

TIME CHECK NEIGHBORHOOD

EXISTING ASSETS

775 780 785

CEDAR RAPIDS, IA

830

SITE ANALYSIS SUMMARY

RESILIENCE + REMEMBRANCE in

730

FLOODABLE

72 0 725

1” = 200’


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