Nelson creek removal of fish barrier
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Nelson Creek – Removal of Fish Barrier. Client: Washington State Department of Transportation December 4, 2013 Rainy Day Industries Justin Monsrud Clay PetermanCheryl Preston. Location Map for Nelson Creek.

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Nelson Creek – Removal of Fish Barrier

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Nelson Creek – Removal of Fish Barrier

Client: Washington State Department of Transportation

December 4, 2013

Rainy Day Industries

Justin MonsrudClay PetermanCheryl Preston


Location Map for Nelson Creek

This project is located in Clallam County, Wa on SR-112 mile post 47.1 at the crossing of Nelson Creek. The site is location in the Olympic Region west of Port Angeles


Project Description

  • Removal of existing box culvert

  • Construction of a 16’ wide by 10’ high culvert

    • Precast 3-sided culvert with wing walls.

    • Strip footing foundations

  • 130’ long structural earth wall on South side

    • Reconstruct existing embankments to a slope of 2H:1V

  • New pavement for roadway

    • Approximately 175’


Project Justification

  • The restoration of declining salmon and trout populations

    • Inability to utilize spawning grounds

    • Opening passage to natural habitat

    • Coho Salmon and Steelhead

    • sea run and resident Cutthroat Trout


Project Scope

  • develop a traffic re-routing plan

  • Pavement design of new roadway

    • Existing impervious surface 17780 approx. 740 ft.

    • New impervious surface 4200 approx. 175 ft.

  • Embankment improvements

  • Earth wall and erosion control design

  • Removal of existing culvert

  • Design of new culvert, wing walls, foundation and strip footings.


Plan View


The Team

  • Roles and Responsibilities:

    • Culvert and strip footing designs.

      • Primary: Justin Monsrud

      • Secondary: Clay Peterman

    • Structural earth wall and embankments.

      • Primary: Clay Peterman

      • Secondary: Cheryl Preston

    • Traffic routing and control and pavement design.

      • Primary: Cheryl Preston

      • Secondary: Justin Monsrud


Permits and Approval

  • Local permits for approval:

  • Clearing, grading, and building permit

  • Critical area ordinance

  • Noise variance

  • State permits for approval:

  • Aquatic lands permit

  • Hydraulic Project Approval (HPA)

  • Federal permits for approval:

  • CWA Section 401

  • CWA Section 402

  • Endangered Species Section 7


Temporary Traffic Management Plan

  • Decision Matrix

    • Scale 1-10

      • 10 most desirable


Temporary Traffic Management Plan

  • Construction schedule


Temporary Traffic Management Plan


Soil Borrow

  • Decision Matrix:

  • Gravel borrow chosen.

    • Less sensitivity to moisture.


Culvert Design

  • Culvert sidewalls are loaded axially and laterally. Have to consider ΦPn and ΦMn. Have to develop a interaction diagram and also consider the limit of cracking at service state.


Culvert Design

Channel restoration

  • Culvert bed material will consist of well graded stream bed sediment (Standard spec 9-03.11.1), stream bed cobbles (Standard spec 9-03.11.2), and stream bed boulders (Standard sec 9-03-.11.3)


Culvert Design

  • For Precast Culvert installation we will need 14 units total to achieve 106 LF (14 joints adding 3.25” in length)


Structural Earth Wall

  • South side of project.

  • Approximately 130 feet long.

  • No more than 20 feet exposed height.

  • A 4 foot bench before slope.


Structural Earth Wall

  • Decision matrix for SE Wall selection.

  • Chose a gabion retaining wall.


Structural Earth Wall

Gabions

Concrete Cantilever

Sheet Piling


Structural Earth Wall

  • Design:

    • 138 feet in length.

    • 18 feet tall at highest point.

    • Checks for overturning, sliding, and bearing capacity.


Strip Footings


WingwallDesign


Grading

  • Requirements:

    • A 2H:1V slope.

    • Vegetation to be planted for erosion control


Erosion Control

  • Vegetation:

    • Will be from native plants chosen based on effectiveness.

  • Other:

    • Wattles, compost socks, and and erosion control blankets will be considered.


Pavement Design

  • Decision Matrix

    • Scale 1-10

      • 10 most desirable


Pavement Design

  • Average Daily Traffic (ADT):

    • 951 units, 26.5% truck traffic

  • Equivalent Single Axle Load (ESAL):

    • Design year =201,081. total design=27,418,510

  • 15 year performance grade binder:

    • PG64-16

http://www.pavementinteractive.org/wsdot-esal-application/

LTPPBIND Software


Pavement Design

Section 3 WADOT’s Pavement Policy

Section 5.2 WSDOT’s Pavement Policy

Minimum shoulder requirements

Section 5.2.5 WSDOT’s Pavement Policy


Pavement Design


Traffic Barrier Design

  • Decision Matrix

    • Scale 1-10

      • 10 most desirable


Traffic Barrier Design


Traffic Barrier Design

  • Beam guardrail type 31 allows 28-31 inch rail height tolerance – Section 1610.06(1)

    • Terminal ET-31 (TL3) or SKT-SP-MGS (TL3) – Section 1610.06(5)(a)

    • Anchor Type 10 – Section 1610.06(5)(e)

    • Steel guardrail posts – Section 1610.06(3)

    • Guardrail placement case 2-31 for two-way traffic – Section 1610.06(7)


Questions?


Temporary Traffic Management Plan

  • Off-site detour


Traffic Barrier Design

  • Guardrail type 31 placement type 2-31


Traffic Barrier Design

  • Guardrail anchor type 10


Traffic Barrier Design

  • Guardrail terminal ET-31 (TL3) or SKT-SP-MGS (TL3)


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