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(7)  Hydro-Acoustic - Hollow steel piling 24 inches in diameter or smaller and H pile designated as HP24 or smaller may be installed below the ordinary high water as follows:


  • Minimize the number and diameter of pilings, as feasible.

  • Repairs, upgrades, and replacement of existing pilings consistent with these conditions are allowed. In addition, up to five single pilings or one dolphin consisting of three to five pilings may be added to an existing facility.

  • Whenever feasible, use vibratory hammer for piling installation. Otherwise, use the smallest drop or hydraulic impact hammer necessary to complete the job, and set the drop height to the minimum necessary to drive the piling.

  • When using an impact hammer to drive or proof steel pile, one of the following sound attenuation devices must be used to reduce sound pressure levels by 20 dB.



  • Place a block of wood or other sound dampening material between the hammer and the piling being driven.

  • If water velocity is 1.7 miles per hour or less, surround the piling being driven by an unconfined bubble curtain that will distribute small air bubbles around 100% of the piling perimeter for the full depth of the water column. Contract the Project Manager for guidance on how to deploy an effective, economical bubble curtain.

  • If water velocity is greater than 1.7 miles per hour, surround the piling being driven by a confined bubble curtain (for example: a bubble ring surrounded by a fabric or metal sleeve) that will distribute air bubbles around 100% of the piling perimeter for the full depth of the water column.

  • Written approval of an alternative sound attenuation plan may be requested to the U. S. Army Corps of Engineers through the Project Manager, provided the plan will maintain sound pressure levels below 150dB rms (1 micro Pascal) for a minimum of 50% of the driver strikes, and peak sound pressure levels below 180 dB rms (1 micro Pascal) for all strikes.


(8)  Drilling, Boring, or Jacking - If drilling, boring, or jacking is used, the following conditions apply:


  • Design, build, and maintain facilities to collect and treat all construction and drilling discharge water using the best available technology applicable to site conditions. Provide treatment to remove debris, nutrients, sediment, petroleum hydrocarbons, metals, and other pollutants likely to be present. An alternate to treatment is collection and proper disposal offsite.

  • Isolate drilling operations from wetted stream to prevent drilling fluids from contacting waters of the state and U.S.

  • Use casing to prevent loss of drilling fluid to the subsurface formation. Do not drill open hole.

  • If it is necessary to drill through an over-water bridge deck, use containment measures to prevent drilling debris from entering the stream channel.

  • If drilling fluid or waste is released to surface water, wetland or other sensitive environment, cease all drilling pending written approval from appropriate regulatory agencies through the Project Manager to resume drilling.

  • Recover all waste and spoils if precipitation is falling or imminent. Recover, recycle, or dispose of all drilling fluids and waste to prevent entry into flowing water.



  • Recycle drilling fluids using a tank instead of drill recovery/recycling pits, whenever feasible.

  • When drilling is completed, make attempts to remove the remaining drilling fluid from the sleeve (for example: by pumping) to reduce turbidity when the sleeve is removed.


(9)  Treated Wood - Do not use of lumber, pilings, or other wood products that are treated or preserved with pesticidal compounds below the ordinary high water (OHW) or as part of an in-water or over-water structure, except as described below:


  • Store treated wood shipped to the Project out of contact with standing water and wet soil, and protected from precipitation.

  • Visually inspect each load and piece of treated wood. Reject for use in or above aquatic environments if visible residues, bleeding of preservative, preservative-saturated sawdust, contaminated soil, or other matter is present.

  • Pilings treated with ammoniacal copper zinc arsenate, chromated copper arsenate, or creosote may be installed below OHW provided that no more than 50 piles are used. No other use for treated wood or preservative type is allowed below or over the OHW.

  • Use pre-fabrication to the extent feasible. When field fabrication is necessary, all cutting and drilling of treated wood, and field preservative treatment of wood exposed by cutting and drilling, shall occur above the OHW. Use tarps, plastic tubs, or similar devices to contain the bulk of any fabrication debris, and wipe off any excess field preservative.

  • All treated wood structures, including pilings, shall have design features to avoid or minimize impacts and abrasion by livestock, pedestrians, vehicles, vessels, and floats.

  • Treated wood may be used to construct a bridge, over-water structure or an in-water structure, provided that all surfaces exposed to leaching by precipitation, overtopping waves, or submersion are coated with a water-proof seal or barrier are maintained. Apply and contain coatings and paint-on field treatment to prevent contamination. Surfaces that are not exposed to precipitation or wave attack, such as parts of a timber bridge completely covered by the bridge deck, are exempt from this requirement.

  • During demolition of treated wood, ensure that no treated wood debris falls into the water. If treated wood debris does fall into the water, remove it immediately.

  • Store removed treated wood debris in appropriate dry storage areas, at least 150 feet away from the regulated work area.


(10)  Piling Removal - If a temporary or permanent piling will be removed, the following conditions apply:


  • Dislodge the piling with a vibratory hammer, whenever feasible.

  • Once loose, place the piling onto the construction barge or other appropriate dry storage site.

  • Ensure remaining treated wood piling is broken, cut, or pushed at least 3 feet below the sediment surface and covered with a cap of clean, native substrates that match surrounding streambed materials.

  • Fill holes left by each piling with clean, native sediments whenever feasible.


(11)  Ditch and Culvert Cleaning - Complete ditch cleaning, culvert and trash rack cleaning by working from the top of bank, unless work area isolation would result in less habitat disturbance.


  • Do not work more than 20 feet upstream or downstream the culvert or trash rack.

  • Remove only the minimum amount of wood, sediment, or other natural debris necessary to maintain the facility’s function, without disturbing spawning gravel or changing the configuration of the original ditch, unless the new configuration is part of the project design.

  • Place all large wood, cobbles, and gravels recovered from during culvert and trash rack cleaning downstream from the structure.

  • Complete drift removal in the following priority, as directed:




  • Pull and release whole logs or trees downstream.

  • Pull whole logs and trees and place in the riparian area, as directed.

  • Remove whole logs or trees only if roadside development plans have been developed for replacement in-kind.

  • Pull, cut only as necessary, and release logs and trees downstream.


(12)  Floating Structures - The following types of over-water or in-water structures are not allowed:


  • boat house

  • boat ramp made of asphalt

  • buoy or float in an active anchorage or fleeting area

  • covered moorage

  • floating storage unit

  • houseboat

  • marine

  • pier

  • non-water related facilities (including staging areas) inside riparian management areas

  • any other over-water structure more than 6-feet wide unless otherwise approved in writing by appropriate regulatory agencies through the Project Manager

The following conditions apply to floatation structures:




  • Concrete boat ramps that consist of pre-cast concrete slabs below the ordinary high water elevation, and higher elevation portions that are completed in the dry so that no wet concrete that has cured less than 24 hours is allowed to contact any wetland or waters of the state and U.S.

  • Rock may be used to construct a boat ramp footing, or other protection necessary to prevent scouring, down-cutting, or failure of the boat ramp, provided that the rock does not extend further than 4 feet from the edge of the ramp in any direction.

  • Any replacement roof, wall, or garage door for covered moorages and boat houses must be made of translucent materials or skylights. In addition, each side, except the door, of the boat house shall have windows at least 4 feet wide installed the length of the boat house, subject to breaks only for structural support.

  • An existing marina may be modified within the existing footprint of the moorage, or in the water more than 50 feet from the shoreline and more than 20 feet deep, except that structures may not be placed in areas that support aquatic vegetation or areas where boat operations may damage aquatic vegetation.

  • Fit all pilings, mooring buoys, and navigational aides with devices to prevent perching by piscivorous birds.

  • Permanently encapsulate all synthetic flotation material to prevent breakup into small pieces and dispersal in water.

  • Install small temporary floats less than 7 Calendar Days before a scheduled event, remove them five days after a scheduled event is concluded, and do not leave them in place longer than 21 Calendar Days.

  • Install mooring buoys and temporary floats (for example: shellfish traps) more than 300 feet from native submerged aquatic vegetation, more than 50 feet from the shoreline, and in water deeper than 20 feet deep at all times, or as necessary to ensure that gear does not ground out unnecessarily, and boats do not prop wash the bottom.


[ End subsection .34(c) ]
(Use the following subsection .36(b) when there is potential disturbance to material bat colonies. Delete what does not apply. Obtain information from Environmentalist.)
00290.36(b)  Bats - Add the following to the end of this subsection:
Protect bats by doing the following:


  • Schedule bridge demolition outside of the bat breeding season (___(date)___ to ___(date)___).

  • If this is not feasible and if approved by the Project Manager, apply exclusionary methods prior to this date to exclude bats from accessing suitable habitat. An exclusionary device is any method that denies birds physical access to the nest site area (for example: nets and hole blockers).

  • Exclusionary devices must be installed a minimum of 15 days prior to this period.

  • Inspect, maintain, and repair exclusionary devices to prevent active occupancy by bats during period listed above.


(Use one of the following option lead-in paragraphs and subsection .36(c)'s as directed by instruction below. Delete the one that does not apply. Obtain information from the Environmentalist.)
[ Use this lead-in paragraph and subsection .36 when migratory birds or bats are known to use the bridge or vegetation in the area and avoidance is feasible. Modify as needed. Delete items that do not apply. ]
[ Begin option 1 subsection .36(c) ]
Add the following subsection:
00290.36(c)  Avoid Nesting - Comply with Migratory Bird Treaty Act (16 U.S.C. 703 712). Submit a migratory bird protection plan for review and approval at least 10 Calendar Days before the pre-construction conference. Include the following:


  • Describe measures to avoid disturbance to migratory bird nesting habitat (vegetation, structures) from March 1 to September 1 of each year.

  • Do not begin work until the migratory bird protection plan is approved.

  • In the event the nesting birds or bats are encountered during construction, the Engineer may suspend the work according to 00180.70


[ End option 1 subsection .36(c) ]
[ Use this lead-in paragraph and subsection .36(c) when migratory birds or bats are known to use the bridge or vegetation in the area and avoidance is NOT feasible. Modify as needed. Delete items that do not apply. ]
[ Begin option 2 subsection .36(c) ]
Add the following subsection:
00290.36(c)  Prevent Nesting - Comply with Migratory Bird Treaty Act (16 U.S.C. 703 712). Submit a migratory bird protection plan for review and approval at least 10 Calendar Days before the pre-construction conference. Include the following:


  • Provide a list of qualified personnel experienced in bird identification, including a summary of their qualifications. A qualified individual shall have at least 2 years of work experience identifying nesting birds in the Pacific Northwest.

  • Describe measures to avoid disturbance to migratory bird nesting habitat (vegetation, structures) from March 1 to September 1 of each year. If complete avoidance is not feasible, describe measure and method to prevent birds and bats from nesting within the Project Site. Describe measures to install, inspect, maintain, and repair exclusionary devices and/or harassment methods, and a schedule for installing, inspecting, and removing exclusionary measures.

  • Do not begin work until the migratory bird protection plan and the implementation schedule are approved.

  • Prevent nesting by native birds on structures to be removed or repaired and on vegetation to be removed as follows:



  • Install, inspect, repair and maintain exclusionary methods or begin harassment methods to prevent nesting of native birds in, on, or under the structures and the vegetation from March 1 to September 1 of each year.

  • If exclusionary measures have been installed or harassment methods have begun on-site prior to NTP, within 15 Calendar Days of the preconstruction conference, assume responsibility for ensuring that native birds do not nest in, on, or under the structures or the vegetation, according to Agency’s migratory bird protection plan, including maintaining and inspecting exclusionary measures.

  • Using qualified personnel from the list, perform inspections on the structures (and the vegetation) according to the implementation schedule for nesting activity and effectiveness of exclusionary measures. Document inspections and maintain documentation on-site.

  • Remove existing bird nests only if no eggs or young are found.

  • Meet with the Agency Biologist, the Engineer, and inspector on-site if nests containing eggs or young are found.

  • Use equivalent materials when repairing or replacing damaged exclusionary measures.

  • If on-site work is completed prior to September 1, discontinue exclusionary measures or harassment methods.

In the event the Contractor fails to prevent nesting of native birds, the Engineer may suspend the work according to 00180.70.


Unless authorized in writing by the Engineer, return to the Engineer, within 5 Calendar Days of removal, all exclusionary measures applied by others prior to the NTP for the Project.
[ End option 2 subsection .36(c) ]
(Use the following lead-in paragraph and subsection .36(d) when there is high noise production work near listed birds. Change "(d)" to "(c)" if either of the above (c)'s are NOT used. Obtain information from Environmentalist.)
[ Begin subsection .36(d) ]
Add the following subsection:
00290.36(d)  Wildlife Avoidance/Harassment (High Noise) -  For purposes of this project, "high noise" is defined as sound pressure levels greater than 10 dBA above the ambient as measured by the LAFmax and LAFeq at sensitive habitat as shown:
(Use the following bullets when suitable habitat for marbled murrelet is located within one mile of the project.)


  • Non-blasting high-noise producing construction activities are not allowed between April 1 and August 5. Blasting activities within one mile of sensitive habitat shall be conducted only between September 15 and March 30.

  • Non-blasting high noise producing construction activities conducted from August 6 to September 15 shall implement a daily limited operating period of daytime work being conducted from two hours after sunrise to two hours before sunset. If night construction is needed, then activity shall be conducted one hour after sunset to one hour before sunrise.



(Use the following bullet when nesting or communal roosting sites for bald eagles are within one mile of blasting activities, 0.5 mile line of sight of construction activities, or 0.25 mile of construction activities.)



  • High-noise producing activities, including blasting, are allowed only between November 1 and August 31.



(Use the following bullets when there is suitable habitat for northern spotted owl near the project site. Delete what does not apply.)



  • Blasting and high-noise producing activities shall be prohibited during the following critical nesting period:



  • March 1 to July 7 for the North Coast Province.

  • March 1 to June 30 for the Rogue/Siskiyou National Forest (NF) and Medford District of U.S. Bureau of Land Management (BLM) in the Southwest Province.

  • March 1 to July 15 for the Umpqua NF in the Southwest Province.

  • March 1 to July 15 for the Willamette Province.

  • March 1 to September 30 for the Deschutes NF, Fremont, and Winema NF and unlisted areas.


[ End subsection .36(d) ]
(Use the following subsection .41(b) when required by relevant permits. Obtain information from the Environmentalist.)
(Use the following subsection .41(b) when required by relevant permits. Obtain information from the Environmentalist.)
00290.41(b)  Disturbing Wetlands - Add the following to the end of this subsection:
Permits have been obtained for this project from the US Army Corps of Engineers (Corps) and the Department of State Lands (DSL). Keep a copy of Corps and DSL permits at the project site during construction. These permits authorize the placement of 30,000 cubic yards of fill within a wetlands located between Stations Fk 09+50 and Fk 15+50. A total of 1.21 acres of wetlands will be permanently impacted. Changes to the project that may increase the amount of fill placed in wetlands or the acreage of wetlands impacted are not authorized.

00290.41(b)  Disturbing Wetlands - Add the following to the end of this subsection:
Permits have been obtained for this project from the [US Army Corps of Engineers (Corps)] and the [Department of State Lands (DSL)]. Keep a copy of Corps and DSL permits at the project site during construction. These permits authorize the placement of _____ cubic yards of fill within wetlands located at Station(s)_____. A total of ____ acres of wetlands will be permanently filled and _____ acres will be temporarily impacted. Changes to the project that may increase the amount of fill placed in wetlands or the acreage of wetlands impacted are not authorized.
SECTION 00305 - CONSTRUCTION SURVEY WORK
(Follow all instructions. If there are no instructions above a subsection, paragraph, sentence, or bullet, then include them in the project but make necessary modifications to only include project specific specifications. Delete specifications that do not apply to the project.)

Section 00305, which is not a Standard Specification, is included for this Project by Special Provision.


Description
00305.00  Scope - This work consists of all surveying activities necessary to control the many phases of work required to construct the Project to the lines and grades as shown, specified, or established.
Make all supporting computations and field notes required for control of the work and as necessary to establish the exact position, orientation, and elevation of the work from control stations, including furnishing and setting construction stakes and marks, reference marks, and additional control stations.
Plans, specifications and other data necessary to lay out the work will be available for inspection at the Project Manager’s office.
00305.01  Definitions:
Confidence Points - Random points measured in the field within the boundary of a digital terrain model (DTM), the purposes of which are to verify the accuracy of the DTM and to provide evidence just prior to construction that the DTM is a reasonable representation of the original ground for computation of volumes and pay quantities. Similarly, confidence points are used to verify that a constructed grade has been built according to the design DTM. Additional information is available from the Engineer.
Confidence point locations follow these guidelines:


  • Randomly selected without regard for the location of DTM points or triangles

  • Evenly distributed over the entire DTM area to be validated

  • Proportionately distributed between confidence point classifications as applicable

  • At a density sufficient to validate the surface, generally ten per instrument location as used in collecting DTM data or if not applicable, as in data collected photogrammetrically, 2% of DTM points


Control Network - An array of control stations either established by the Contractor or provided by the Agency.
Control Station - Any item identified in the Project records as having a position and/or elevation on the Project datum and intended to be used to control the many phases of the construction work.
Digital Terrain Model (DTM) - An electronic computer model of the shape of the ground.
Reference Stakes - Stakes set away from but with information relating back to the intended location and/or grade.
Slope Catch - The location where a design slope intersects the existing ground and where excavation or embankment work should begin to provide the intended earthwork.
Slope Staking - The process of using measurements and calculations in the field to determine the slope catch. Slope staking shall normally include setting stakes to mark the slope catch and setting a reference stake for every catch stake.
Stakes - Stakes, nails, marks, string lines, or other devices or mechanisms set or established for the purpose of indicating or controlling the location, orientation, or grade of any feature intended for construction, or for the purpose of limiting or influencing the construction work.
Staking - The act of placing stakes.
Survey Marker - Any survey monument, control station, or stake.
Survey Monument - Any natural or man-made item specified or identified in a property deed, boundary survey, government document, or other instrument of public record, when the purpose of said item is to mark or reference a property boundary, geographical location, elevation, or other position.
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