19 Jan 2011 1

Lqnusujo

Fargo-Moorhead Metropolitan Flood Risk Management Project

US Army Corps of Engineers BUILDING STRONG®

Industry Day - Overview June 27, 2012

Design details are preliminary and may change. The information presented is provided for general

overview and discussion purposes only.

June 2012 2

June 2012 3

Provide quick overview of Project

Intent of Construction Industry Day

Intent of Contracting Seminar

What will happen with the

information provided

What won’t be discussed

Fargo-Moorhead Flood 2009

Welcome

June 2012 4

The Record of Decision signed by the Assistant Secretary of the Army April 3, 2012

Now Congress decides whether to authorize and fund construction of the project

The Corps and Local Sponsors are moving forward with the design phase

Currently designing from the Outlet (near Georgetown, MN) to Maple River, downstream to upstream

Project Status

June 2012 5

Red River Flood Stage = 18 feet on the Fargo gage Exceeded in 48 of the past 109 years Exceeded every year from 1993 through

2011

Catastrophic damages have been prevented by emergency measures 11 disaster declarations since 1989

2009 was the flood of record Stage of 40.8 feet 2-percent chance (50 year) event Emergency measures cost approximately

$70M

Background

June 2012 6

Plan components 20,000 cfs ND diversion channel 50,000 acre feet storage area 150,000 acre feet staging area 35-mile diversion 12 miles of tie-back embankments Control structures on the Red & Wild

Rice rivers Aqueduct & spillway structures on

the Sheyenne & Maple rivers Rock ramp drop structure on the

Lower Rush & Rush rivers Meandering low-flow channel Non-structural mitigation for impacts

in the storage & staging areas

Federally Recommended Plan

June 2012 7

Have started design activities for: Outlet/Design Reach1 Design Reach 2 Design Reach 3 (sponsors) Design Reach 4 Rush River structure Design Reach 5 Lower Rush River structure Design Reach 6 (sponsors) Design Reach 7 (Maple River aqueduct) Environmental mitigation projects

Bridges and associated channel designed by the sponsors CR 31/4, 32, 22, 20 I-29 Hwy 81

Current Design Reaches

June 2012 8

Reach lengths will change depending on future funding and acquisition plan

Construction reaches may differ from design reaches

Alignment from Maple River to Sheyenne River upstream may change

Estimated 55,000,000 cubic yards of excavation (Feasibility Study)

Project Design Reaches

June 2012 9

Outlet/Design Reach 1

June 2012 10

Downstream (north) end of diversion channel

Confluence of Red River to station 225+00

Features Outlet Structure County Drains 29 and 30 Design of local drainage done by

local sponsor

Transportation Re-alignment of County Roads 173rd

Ave SE and 25th St SE Design and construction of bridges

done by local sponsor

Outlet/Design Reach 1

Outlet Structure Plan components

Rock armored drops 1V:50H from low-flow channel to

the invert of Red River Boulder steps: 4-5ft diameter to

create appropriate water depths, resting areas for fish and energy dissipation

June 2012 11

Diversion Channel and Low-Flow Channel FEIS included a

250’ channel Current Plan

300 ft width, 1V:7H side slope up to existing ground

Bottom of channel slopes 2% toward the low-flow channel

Meandering low-flow channel included within the main channel

June 2012 12

Environmental Considerations Meandering low flow channel Planting plan: native wetland species

June 2012 13

Conceptual Section of the Diversion

June 2012 14

Detailed Design Items Ditching

required for lateral drainage

Meandering low flow channel

Excavated Material Berms (EMB) configuration

Recreation

Excavated Material Berms (EMB) and Levees

June 2012 15

Excavated material placed in berms along left and right banks of diversion channel Right Bank:

Embedded levee Recreation Maintenance road

Left Bank:

No levee Maintenance road Drainage inlets

June 2012 16

County Drains 29 & 30

County Drains County Drain 29

Routed to Outlet

County Drain 30 Enters Diversion at station 222+36

on left side of diversion Passes through EMB

June 2012 17

Typical for structures in subsequent reaches (showing Drain 30)

June 2012 18

Lower Rush & Rush Rivers

Lower Rush and Rush Rivers Rock Ramps Plan components

Rock ramp drops followed by riffle pools

5-ft boulders at drops and 15-in rocks in pool areas

Fish passage

Rush rock ramp width of 200-ft Lower Rush rock ramp width of 150-ft

June 2012 19 Rush River Structure

Lower Rush and Rush Rivers Concept

June 2012 20

Schematic of the rock ramp used in the hydraulic analysis

Maple River Sheyenne River

June 2012 21

Maple & Sheyenne Rivers

Maple and Sheyenne Rivers Aqueduct Structures

Plan components Natural river channel will under

under the Diversion channel No gate No operation during flood events Similar to highway overpass Deep foundation Structures possibly heated 250’ span x 50’ width (Feasibility) Cost = $60M (Feasibility)

June 2012 22

Maple River Structure

Maple River Aqueduct Structure

June 2012 23

Aqueduct visualization

June 2012 24

Gated Control Structures Wolverton Creek Control

Structure Red River Control Structure Wild Rick Control Structure

Control Structure

Plan components Operable gates Gates used to limit flow passing

into the cities

Red River structure 182’ wide x 78’ deep (Feasibility) Cost = $61M (Feasibility)

June 2012 25

Red River Control Structure

June 2012 26

Aqueduct visualization Red River Control Structure visualization (gates open - no flooding)

Water Storage Area 1

Plan components Confined by 12 miles of

embankments No gates

June 2012 27

Water Staging Area

Plan components Tie-back embankment running east into Minnesota Overflow embankment running south in North Dakota

Adjacent to CR 17 At a staging elevation of 923.0, 20,000 cfs enters the diversion channel

June 2012 28

June 2012 29

Water Staging Area

Environmental Mitigation Projects Drayton Dam –Fish Passage/biotic connectivity Wild Rice River – Fish Passage/biotic connectivity Buffalo River – River Restoration

Additional mitigation projects may be identified in the future to include: fish passage, riparian forest restoration, floodplain forest restoration

June 2012 30

June 2012 31

Project Location

Drayton Dam Fish Passage Construct new rock ramp fishway structure with sheetpile cutoff 300ft up stream of existing dam

June 2012 32

Drayton Dam, ND Riverside Dam, ND

Existing structure

Drayton Dam Fish Passage

Wild Rice River Fish Passage Construct rock ramp fishway over

existing dam Similar to other Corps fishways on the

Red River, including Riverside Dam in Grand Forks, ND

June 2012 33

Wild Rice Dam, ND

Buffalo River Restoration Restore portions of river to a more natural channel Restore existing river channel in two areas Install rock riffles for grade control Excavate pools behind rock riffles Potentially remove existing road (Junction Ave.)

June 2012 34

Buffalo River, Hawley MN Project Location

Moving Forward Continued analysis to improve overall project by increasing value

and decreasing future risks: Continue to work on technical information Value Engineering studies Examine cost saving measures identified in feasibility study

June 2012 35

June 2012 36

Once authorized and funded by Congress +3 months - Sign Project Partnership Agreement +6 months – Earliest construction start + 8.5 years – Project Operable *

Earliest construction start

Summer 2013

* 8.5 year construction period based on $240 Million/year funding stream

Tentative Project Schedule

June 2012 37

Questions?