proposed revision of the hydraulic code rules · 2019-12-19 · proposed revision of the hydraulic...
TRANSCRIPT
Proposed Revision of the Hydraulic Code Rules
Randi Thurston
Dave Price
Habitat Program
February 7-8, 2014, WDFW Commission Meeting Presentation 1
Information is subject to changes and amendments over time.
Overview
• Water crossings – Culverts
– Bridges
– Fords
• Fish passage structures – Fish ladders
– Hydraulic designs
• Beaver dam management
February 7-8, 2014, WDFW Commission Meeting Presentation 2
Information is subject to changes and amendments over time.
Water Crossings
Water crossings facilitate the movement of people or materials over water.
– Culverts
– Bridges
– Fords
February 7-8, 2014, WDFW Commission Meeting Presentation 3
Information is subject to changes and amendments over time.
Regulatory History
1890 - Dams and obstructions must be passable to fish.
1950 – Highway culverts must also pass fish.
1994 – WAC included design criteria for water crossings
February 7-8, 2014, WDFW Commission Meeting Presentation 4
Information is subject to changes and amendments over time.
Crossing Requirements
Crossings must be constructed to avoid or minimize impacts to fish and their habitat:
– Durable and efficient
fish passage
– Preservation of
in-stream habitat
February 7-8, 2014, WDFW Commission Meeting Presentation 5
Information is subject to changes and amendments over time.
Passage and Habitat Standard
Because passage and
habitat are required for
all fish in all streams,
culverts and bridges
should simulate natural
streams.
February 7-8, 2014, WDFW Commission Meeting Presentation 6
Information is subject to changes and amendments over time.
Stream Simulation Culverts
7
1. Culvert at stream gradient
2. Culvert bed width equal
to 1.2 x channel bed width
+ 2 ft. or alternative
3. Downstream
countersink 30-50%
of rise
4. Upstream
countersink 30-
50% of rise
Requires complex engineering
‘No Slope’ Culverts
8
1. Culvert at flat gradient
2. Culvert bed width equal
to channel bed width
3. Minimum
downstream
countersink 20% of
rise
4. Upstream countersink
40% of rise maximum
Does not requires complex engineering
Proposed W.C. WAC
Major changes:
• Stream simulation culvert design method
• Bridge design for habitat protection
• Ford design provisions
February 7-8, 2014, WDFW Commission Meeting Presentation 9
Information is subject to changes and amendments over time.
Proposed W.C. WAC
220-110-190:
• Uses stream simulation as the goal for design
• Provides design guidelines for culverts, bridges and fords
• Allows the designer freedom to choose methods and some criteria
February 7-8, 2014, WDFW Commission Meeting Presentation 10
Information is subject to changes and amendments over time.
Fishways
February 7-8, 2014, WDFW Commission Meeting Presentation 11
Information is subject to changes and amendments over time.
Fishways are designed specifically to pass certain fish – mostly adult salmon and trout
Fishway Applications
February 7-8, 2014, WDFW Commission Meeting Presentation 12
Information is subject to changes and amendments over time.
• Temporary passage
• Passage at an
existing barrier
• Roughened channel
Fishway Design
February 7-8, 2014, WDFW Commission Meeting Presentation 13
Information is subject to changes and amendments over time.
• Engineers stamp required
• Must meet specific criteria
• Must be inspected and maintained
Beaver Dam Management
Types of Activities
• Dam removal or breaching
• Water level control devices
• Beaver exclusion devices
14 February 7-8, 2014, WDFW Commission
Meeting Presentation
Information is subject to changes and
amendments over time.
Water Level Control Device
15 February 7-8, 2014, WDFW Commission
Meeting Presentation
Information is subject to changes and
amendments over time.
Clemson Beaver Pond Leveler
Beaver Exclusion Device
16 February 7-8, 2014, WDFW Commission
Meeting Presentation
Information is subject to changes and
amendments over time.
Stillaguamish Tribe Beaver Defeater Trapezoidal Fence
Potential Impacts from Beaver Dam Management
Fish life concerns
• Loss of fish habitat
– Coho
– Olympic mudminnow
• Impacts to water quality
– Water storage
– Sediment storage
17
Information is subject to changes and
amendments over time. February 7-8, 2014, WDFW Commission
Meeting Presentation
Rules for Beaver Dam Management
Provisions
• Dam removal
– Remove only to prevent damage
– Control sediment and water release
• Water level control and exclusion
– Provide fish passage
18 Information is subject to changes and
amendments over time. February 7-8, 2014, WDFW Commission
Meeting Presentation
March Meeting
February 7-8, 2014, WDFW Commission Meeting Presentation
19 19 Information is subject to changes and
amendments over time.
Saltwater Sections
• Authorized work times
• Residential docks
• Outfalls and tide gates
• Boring
Contact Information
Randi Thurston
Protection Division [email protected]
(360) 902-2602
February 7-8, 2014, WDFW Commission Meeting Presentation 20
Information is subject to changes and amendments over time.