[Ord. No. 02-01 Part B §1, 4-1-2004; Ord. No. 06-02 Part B §1, 1-26-2006; Ord. No. 06-08 Part B §1, 3-23-2006; Ord. No. 06-11 Part B §1, 5-4-2006; Ord. No. 06-14 Part B §1, 7-13-2006; Ord. No. 07-01 Part B §1, 2-1-2007; Ord. No. 07-02 Part B §1, 3-15-2007; Ord. No. 08-03 Part B §1, 7-1-2008; Ord. No. 08-05 Part B §1, 10-2-2008]
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Arterial
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Collector
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Local
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Right-of-way width
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60'
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60'
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60'
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Cul-de-sac (R/W)
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N/A
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N/A
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116'
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Surface radius
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N/A
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N/A
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50'
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Surface width
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24'
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24'
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24'
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Design speed
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35 mph
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35 mph
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35 mph
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[Ord. No. 02-01 Part B §2, 4-1-2004; Ord. No. 06-02 Part B §2, 1-26-2006; Ord. No. 06-08 Part B §2, 3-23-2006; Ord. No. 06-11 Part B §2, 5-4-2006; Ord. No. 06-14 Part B §2, 7-13-2006; Ord. No. 07-01 Part B §2, 2-1-2007; Ord. No. 07-02 Part B §2, 3-15-2007; Ord. No. 08-03 Part B §2, 7-1-2008; Ord. No. 08-05 Part B §2, 10-2-2008]
A.
Standard Specification. All street and storm drainage construction
shall meet the requirements of Cass County specifications and standards
and all subsequent revisions.
B.
Supplemental Specification Or Special Provisions To The Standard
Specifications. Street and storm drainage construction not addressed by the standard specifications are as indicated below. Geometric requirements of Section 510.060 shall apply.
C.
Asphalt Surface Roadways. Asphalt roadways constructed without
curbs as allowed by these specifications shall meet the standard specification
with the following exceptions:
E.
Base (Minimum Requirements). Subgrade shall consist of suitable
construction material, free of organic or other undesirable material,
properly compacted to ninety-five percent (95%) of the standard proctor
density. Any testing required will be the responsibility of the contractor
with test results to be submitted to the Road/Bridge Department for
review. Unsuitable subgrade material shall be removed and replaced
as necessary. One and one-half (1½) inch to two (2) inch sized
rock shall be incorporated into and compacted as part of the base
as necessary. Application rate for the base rock will be approximated
two thousand six hundred (2,600) ton/mile for twenty-four (24) foot
width roadways. Application rates for other widths shall be adjusted
accordingly.
F.
Surface (Minimum Requirements).
1.
First (1st) application.
2.
Second (2nd) application.
a.
One (1) inch to one and one-quarter (1¼) inch minus rock —
one thousand four hundred (1,400) ton/mile for twenty-four (24) foot
width.
b.
Surface shall be graded and profiled to meet the requirements of
typical roadway section.
c.
Copies of rock tickets or other acceptable proof of rock quantities
shall be submitted to the Public Works Department. Acceptance of base
rock construction and surface course may be based on visual inspection
by the department at the discretion of the Public Works Director.
G.
Subdivision Road Requirements.
1.
All new interior subdivision roads require twenty-four (24) foot
road width which consists of a three (3) inch asphalt overlay over
top of six (6) inch compacted aggregate base.
2.
County roads that abut the subdivision to be C/S or asphalt the full
width of twenty-four (24) feet.
3.
All roads to be completed within two (2) years from final plat filing.
[Ord. No. 02-01 Part B §3, 4-1-2004; Ord. No. 06-02 Part B §3, 1-26-2006; Ord. No. 06-08 Part B §3, 3-23-2006; Ord. No. 06-11 Part B §3, 5-4-2006; Ord. No. 06-14 Part B §3, 7-13-2006; Ord. No. 07-01 Part B §3, 2-1-2007; Ord. No. 07-02 Part B §3, 3-15-2007; Ord. No. 08-03 Part B §3, 7-1-2008; Ord. No. 08-05 Part B §3, 10-2-2008]
A.
All
storm drainage shall be carried in enclosed storm sewers or open channels
subject to the following criteria and consistent with other County
regulations or requirements. Stormwater quantities for open channel
or drainage structures serving a drainage area of less than two hundred
(200) acres shall be calculated using the rational method, Q=CIA.
Stormwater quantities serving drainage areas of greater than two hundred
(200) acres shall be calculated using "Technique for Estimating the
Magnitude and Frequency of Missouri Floods". The Manning Equation
shall be used for sizing of open channels, culvert pipe or other similar
structures.
B.
Design Flood Return Frequencies.
1.
Q10 — All enclosed structures in residential areas.
2.
Q25 — Commercial property, arterial or collector street culverts
and open channel (earth) slopes.
3.
Q50 — Open paved drainage channels.
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The engineer shall have detailed computations available to support
the design and may be required to submit them to Public Works Director
or his representative.
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C.
Minimum Pipe Size. The minimum size culvert pipe shall be
fifteen (15) inches in diameter except under roadways where eighteen
(18) inches in diameter shall be minimum.
D.
Material Allowed. (Culverts, Storm Drains) — Reinforced
concrete pipe (RCP), corrugated metal pipe (CMP) – annular riveted
or helical meeting corrugated minimum gage requirements, corrugated
polypropylene (PE) pipe (corrugated or corrugated with smooth interior
wall, or corrugated polypropylene (PP) pipe (corrugated). RCP shall
not be allowed under or adjacent to granular surfaced roadways. All
pipes shall be used and installed in conformance with manufacturer
specifications and guidelines.
[Ord. No. 17-06, 11-2-2017]
E.
Length Of Pipe. All drainage pipes shall be of sufficient
length such that pipe flow discharges beyond the toe fill and onto
natural or stabilized ground.
F.
Velocity. All storm drainage pipes, culverts and open paved
channels shall be designed so as to maintain a minimum velocity of
flow of three (3) fps and a maximum of fifteen (15) fps when flowing
full. All open storm drainage channels (earth channels) shall have
a gradient to keep the velocity within one and one-half (1.5) to four
(4.0) fps depending on existing soil conditions. Consideration shall
be given to design and construction of discharge energy dissipaters
to prevent erosion and souring along downstream properties.
G.
Cover Depth. The minimum allowable fill or cover for structures
under roadways shall be one (1) foot or a minimum clearance of six
(6) inches from the top of structure to the bottom of pavement's base,
except for box culverts designed to carry traffic on the top slab.
Structural protection, such as special bedding, shall be provided
where adequate cover cannot be attained. Special consideration may
be made by Road/Bridge Department for culverts under private entrances.
[Ord. No. 02-01 Part B §4, 4-1-2004; Ord. No. 06-02 Part B §4, 1-26-2006; Ord. No. 06-08 Part B §4, 3-23-2006; Ord. No. 06-11 Part B §4, 5-4-2006; Ord. No. 06-14 Part B §4, 7-13-2006; Ord. No. 07-01 Part B §4, 2-1-2007; Ord. No. 07-02 Part B §4, 3-15-2007; Ord. No. 08-03 Part B §4, 7-1-2008; Ord. No. 08-05 Part B §4, 10-2-2008]
A.
NOTE:
Person(s) desiring to cross the roadway in Cass County must obtain
a permit from the Public Works Director before the construction begins
and may require a posted bond.
1.
Roadway cuts in existing asphalt and chip sealed or gravel roadways
in Cass County are not allowed. Person(s) must bore under the roadway.
2.
Utility cuts in granular surfaced roadways shall be repaired in a
manner not to create a depression in the surface when complete.
3.
All underground water line installations within the road right-of-way
(in back slope only) shall have a minimum cover of forty-two (42)
inches. All other underground installations shall have a minimum cover
of thirty (30) inches. Direct burial of underground telephone or TV
cable placed parallel with the roadway shall have a minimum cover
of twenty-four (24) inches. Not in ditch line.
4.
Roadway ditches, culverts and other devices used to carry surface
runoff shall be kept open, free and clear at all times. Construction
signing shall be required and consistent with the Manual on Uniform
Traffic Control Devices (MUTCD). All disturbed areas shall be seeded
and mulched to the satisfaction of the Road/Bridge Department. All
work shall be performed expediently and in a workmanship matter.
5.
Person(s) receiving permit shall be responsible for correcting any
deficient repairs for a period of ninety (90) days from the completion
of the work or the permit deadline, whichever is longer.
[Ord. No. 02-01 Part B §5, 4-1-2004; Ord. No. 06-02 Part B §5, 1-26-2006; Ord. No. 06-08 Part B §5, 3-23-2006; Ord. No. 06-11 Part B §5, 5-4-2006; Ord. No. 06-14 Part B §5, 7-13-2006; Ord. No. 07-01 Part B §5, 2-1-2007; Ord. No. 07-02 Part B §5, 3-15-2007; Ord. No. 08-03 Part B §5, 7-1-2008; Ord. No. 08-05 Part B §5, 10-2-2008]
A.
All
unpaved or unsurfaced areas within road rights-of-way which have been
disturbed during grading, construction or utility operations shall
be fertilized and seeded to minimize erosion in those areas.
B.
Mulching
is required on areas where slopes, soil type, excessive drainage or
other conditions indicate additional protection is necessary.
C.
The
area to be seeded shall have uniform surface free from rills, washes
and depressions. Seeding shall be done before the proposed seedbed
becomes eroded, crusted over or dries out and shall not be done when
the ground is frozen or covered with snow. Seed shall be uniformly
applied at a rate which will insure a dense growth to control erosion.
If proper growth is not obtained as a result of the initial seeding,
additional applications of seed will be required until satisfactory
results are obtained. The Director of Public Works may waive this
requirement if the developer has provided adequate erosion control
by some other means.
[Ord. No. 02-01 Part B §6, 4-1-2004; Ord. No. 06-02 Part B §6, 1-26-2006; Ord. No. 06-08 Part B §6, 3-23-2006; Ord. No. 06-11 Part B §6, 5-4-2006; Ord. No. 06-14 Part B §6, 7-13-2006; Ord. No. 07-01 Part B §6, 2-1-2007; Ord. No. 07-02 Part B §6, 3-15-2007; Ord. No. 08-03 Part B §6, 7-1-2008; Ord. No. 08-05 Part B §6, 10-2-2008]
A.
Any
variance to the geometric requirements or minimum construction standards
as set forth in these BMPs must be approved by the County Commission.
B.
Persons
requesting variances shall make application to the Road and Bridge
Department indicating the variances desired along with justification
for those requests. The Road and Bridge Department will assist the
applicant in determining what supporting documentation or information
might be required by the County Commission evaluating the request.
D.
Procedure.
1.
Application for variance shall be made to the Road and Bridge Department.
2.
Road and Bridge Department shall schedule a public hearing before
Road and Bridge Advisory Committee to hear request.
3.
Road and Bridge Department shall provide legal notice of said public
hearing.
4.
County Commission shall formally hear from the requesting party the
request for variances as scheduled.
5.
County Commission shall allow the public an opportunity for comment
before calling a vote on any requested variances.
6.
County Commission may request that additional information be provided
by the requesting party(ies) or by road and bridge staff prior to
making a decision.
[Ord. No. 02-01 Part B §7, 4-1-2004; Ord. No. 06-02 Part B §7, 1-26-2006; Ord. No. 06-08 Part B §7, 3-23-2006; Ord. No. 06-11 Part B §7, 5-4-2006; Ord. No. 06-14 Part B §7, 7-13-2006; Ord. No. 07-01 Part B §7, 2-1-2007; Ord. No. 07-02 Part B §7, 3-15-2007; Ord. No. 08-03 Part B §7, 7-1-2008; Ord. No. 08-05 Part B §7, 10-2-2008]
A.
Permits
are required by the Road and Bridge Department for the purpose of
identifying responsible parties who perform work on any publicly dedicated
right-of-way. This identification allows the department to more evenly
and consistently enforce the requirements of these BMPs and procedures
upon all persons who perform work on County rights-of-way and to be
better prepared to answer questions about work that is being performed
on County rights-of-way.
B.
The
following permits are required by these specifications. References
are made to other parts of the BMPs and procedures and other regulations
as appropriate. Permit fees and bonding requirements of these specifications
shall not apply to public utilities or other public agencies. Private
contractors under contract with public utilities or public agencies
are not exempt from these fees or bonding requirements.
[Ord. No. 02-01 Part B §8, 4-1-2004; Ord. No. 06-02 Part B §8, 1-26-2006; Ord. No. 06-08 Part B §8, 3-23-2006; Ord. No. 06-11 Part B §8, 5-4-2006; Ord. No. 06-14 Part B §8, 7-13-2006; Ord. No. 07-01 Part B §8, 2-1-2007; Ord. No. 07-02 Part B §8, 3-15-2007; Ord. No. 08-03 Part B §8, 7-1-2008; Ord. No. 08-05 Part B §8, 10-2-2008]
A.
A permit
shall be obtained from the Road/Bridge Department prior to performing
any clearing, grading, shaping, excavation or any other work within
public dedicated right-of-way except that a property owner may perform
mowing, clearing or brush cutting work on County right-of-way directly
adjacent to their property without a permit.
B.
A bond
or cash security may be required to be provided to the Road/Bridge
Department in an amount to be established by said department to ensure
that the right-of-way is repaired to its original condition.
C.
Fee. As prescribed by the Cass County Commission.
D.
Bond Or Cash Security. As required.
[Ord. No. 02-01 Part B §9, 4-1-2004; Ord. No. 06-02 Part B §9, 1-26-2006; Ord. No. 06-08 Part B §9, 3-23-2006; Ord. No. 06-11 Part B §9, 5-4-2006; Ord. No. 06-14 Part B §9, 7-13-2006; Ord. No. 07-01 Part B §9, 2-1-2007; Ord. No. 07-02 Part B §9, 3-15-2007; Ord. No. 08-03 Part B §9, 7-1-2008; Ord. No. 08-05 Part B §9, 10-2-2008]
A.
Prior
to starting any construction or improvement covered by these specifications,
the owner/developer/contractor shall notify the Road/Bridge Department
at least twenty-four (24) hours prior to beginning said construction.
An inspection is required to assure compliance with the plans and
specifications as approved by the Road and Bridge Department. If the
owner/developer/contractor shall fail to notify the Road and Bridge
Department concerning such construction or commencement of construction,
it shall be the responsibility of the owner/developer/contractor at
his cost to furnish proof that such construction complies with County
plans and specifications and these regulations. Substandard work must
be corrected by the owner/developer/contractor at his cost. Periodic
inspections shall be required during construction work as indicated
below (and as applicable).
B.
Streets And Roadways.
1.
After subgrade has been prepared and prior to any subbase or base
construction.
2.
After base has been constructed and before surfacing is applied,
if required.
3.
Before and after prime coat application.
4.
When asphalt or concrete paving operation has been started.
5.
After the completion of paving or surfacing.
6.
After all material and debris has been cleared from street and right-of-way
and all lot pins have been reset.
7.
Final inspection for approval.
