BUILDING STRONG®

Lqnusujo

September 2012

1

Fargo-Moorhead Metropolitan Flood Risk

Management Project

US Army Corps of Engineers

BUILDING STRONG®

Flood Diversion Board of Authority meeting

December 19, 2013

Fargo-Moorhead Metropolitan Flood Risk

Management Project

BUILDING STRONG®

Monthly Update

Maple River Physical Model

Project Path Forward

2

Fargo-Moorhead - 2009

Presentation Outline

BUILDING STRONG®

Corps Monthly Update

Design work continues on Outlet to

Reach 4, with Outlet/Reach 1 and Reach

2 nearing technical completion.

Continue to support MnEIS process

Maple River Aqueduct Physical Modeling

is moving forward

Oxbow/Hickson/Bakke Levee design

Met with the Rush River Water Resource

District

Developing a Cemetery Study

3

BUILDING STRONG®

Maple River Physical Modeling

Description: Allows diversion channel to

pass beneath the Maple River

Spillway allows floods greater

than a bank full event to be

diverted to diversion channel

River remains biologically

connected; maintains fish

passage

Limits flow to the protected

side

4

BUILDING STRONG®

Reasons for Detailed Modeling Study

Evaluate plunging, pressurized flow under aqueduct

Evaluate flow split at the spillway

Structure is part of the line of protection

Cost of structures warrants investment

5

BUILDING STRONG®

Physical Model

Location: UMore Park, Rosemount, MN

Scale: 1:50, horizontal and vertical

Features: diversion channel, relocated

Maple River channel, aqueduct, spillway

6

UMore Park

BUILDING STRONG® 7

North Extent – Diversion, 300 feet upstream of 40th Avenue North

South Extent – Diversion, 100 feet downstream of diversion curvature

East extent – Maple River, 50 feet downstream of the downstream extent of the engineered channel

West extent – Maple River, 610 feet upstream of spillway mouth

BUILDING STRONG® 8

BUILDING STRONG®

Physical Model

Building size: 17,000 square feet

Model physical size: Approximately 80’ long, 70’ wide

Construction materials:

► Channels: concrete

► Aqueduct: plexiglass

9

BUILDING STRONG® 10

Hydraulic Model Schedule

August 2013: Construction restarted

December 2013: Construction complete

March 2014:

► Phase 1 completion

► Calibration, performance verification and testing plan complete

June 2014: Intermediate results workshop

Summer 2014: Model Tour/Presentation

October 2014: Hydraulic optimization report complete

December 2014: Final aqueduct modeling report

BUILDING STRONG®

Other Aqueducts

11

Hennepin Canal, Illinois

Completed by Corps in 1907

Connects Illinois and Mississippi

Rivers

9 original aqueducts; 6 remain

Recreation only now

India

Approx. 100 miles east of New

Delhi

“Super passages”

Natural channel over man-made

canal

BUILDING STRONG®

Project Path Forward

Design Agreement Amendment No 1

► Approved by Corps’ Headquarters. Documents being routed for

sponsor signatures. Executed once the Colonel signs the

documents.

Await Federal Authorization for the project

Continue to review design products

Corps provides input into MN EIS process (ongoing)

Continue Oxbow/Hickson/Bakke levee coordination and

design.

Construction Memorandum of Understanding (MOU)

► Package was submitted to Corps’ Division for approval.

12

BUILDING STRONG®

Next

Administrative/Legal

Design Contracts / Task Orders

13