Wis. Admin. Code Department of Transportation Trans 207.10 - Construction methods
(1) TEMPORARY NAVIGATIONAL CLEARANCE. In the
placement of all construction forms, bracing, and falsework in or over
navigable waters, as much clearance as is practicable shall be provided,
consistent with the character and volume of navigational traffic and the
duration of the construction phase.
(2) TEMPORARY WATERWAY OPENING. Consistent
with stream flows reasonably predictable during the time period of use,
temporary structures shall have sufficient waterway opening, either inherent in
the structure or combined with an overflow area, to prevent damage from back-up
of water and downstream siltation due to washout or scouring of temporary
facilities.
(3) TEMPORARY EROSION
CONTROL. Constructing authorities shall ensure that contractors or municipal
employees perform all construction activities in such a way as to minimize the
contamination of the stream by silt, debris, or toxic materials. Temporary
erosion control measures such as ditch dams, settling ponds, erosion bales, and
others shall be used for this purpose. When erosion bales are used, they shall
be placed in accordance with Figure 4.
(4) TIMING OF CONSTRUCTION. Construction
activities shall be undertaken and planned for completion during such seasons
and weather conditions as to minimize adverse impacts on fish spawning
activities, flood water elevations, and public recreation activities.
(5) REMOVAL OF OLD STRUCTURES.
(a) Old structures shall be removed if they
are no longer to be used for highway purposes unless it is deemed to be in the
public interest to leave such structures intact for recreational or other use.
In such cases the structure no longer has the legal status of a highway
structure. Firm arrangements shall be made for future responsibility and
maintenance if structures are to remain in place.
(b)
1. When
structures are removed, all substructure units shall be removed to an elevation
2 feet below the groundline remaining after any shaping in above-water areas,
and level with the stream bed elevation in submerged areas.
2. Old abutment fills shall be shaped so as
to blend into the adjoining terrain.
3. If unusual circumstances appear to warrant
leaving old substructure units or abutment fills within the area defined by the
ordinary high watermark and at a higher elevation than the stream bed
elevation, constructing authorities must notify the department of natural
resources and obtain concurrence that to do so is in the public
interest.
(6)
EXCAVATION AND DISPOSAL OF PEAT, MULCH, OR OTHER UNSUITABLE EMBANKMENT OR
FOUNDATION MATERIAL.
(a) Excavation of
organic or other material found not suitable to carry embankment loading shall
be done in such a manner so as to preclude, as far as practicable, washing of
piled-up material into navigable waters. Sufficient crossroad and toe of fill
drainage shall be provided to maintain the natural continuity of ground water
flow. The extent of lateral upheaval shall be estimated and shall be considered
as part of the effects which may necessitate changing locations or taking other
mitigating measures.
(b) Organic
and unsuitable material may normally be disposed of on the sides of
embankments, unless a sensitive or unique environmental situation necessitates
removal and disposal on a less sensitive site. Highly polluted or toxic
materials excavated must be disposed of under state laws and regulations
governing such material.
Notes
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