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7/28/2019 0 Getting Caltrans to Approve Your Plans (1)
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Getting Caltrans to Approve
Your Plans
Basic Drainage Policies and
Requirements
Roy H. King, MS,PE
California Department of TransportationDivision of Hydraulics
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Getting Started IGR (Inter-Governmental Review)
Optional but HIGHLY RECOMMENDED!
Environmental Processing and Approval
Research (Encroachment Permit Required
for ALL WORK within Caltrans Right-of-Way!)
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Plan and Permit Processing Plan Submittal (PS & E Package, including
Drainage Report)
Plan Review and Approval
Construction
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REMEMBER:
We Have High-Speed Traffic! (Affects ALL
FACILITIES on our Highways!)
Affects DESIGN!
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Caltrans Drainage Considerations
On-site Drainage
Off-site (Cross) Drainage
California Drainage Law Existing / Future Storm Drain Systems
FEMA and Flood Plain Issues
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On-Site Drainage
No more than 0.1 cubic foot per second
during a 25-year frequency storm allowed
as concentrated flow anywhere within the
traveled way.
No water allowed to pond into the traveled
way during a 25-year frequency storm.
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Off-Site Drainage
No formal written policy for design of
culverts.
Informal Policy: 100-year storm flow may
not pond to the edge of traveled way; 10-
year storm may not cause the culvert to
seal or flow under pressure.
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FEMA Issues Is there a FIRM map for any of the
watercourses near your project? Will your proposed construction potentiallyraise the water surface by one foot or more?
Ifso, you will need to prepare a LOMR orCLOMR
- and: -
Even if there is no FIRM map, you stillmighthave to prepare a LOMR or CLOMR!
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FEMA Website:
http://msc.fema.gov/webapp/wcs/stores/se
rvlet/FemaWelcomeView?storeId=10001&
catalogId=10001&langId=-1
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Recent Problem # 1
Where water previously flowed well
outside the traveled way, the installation of
curb and gutter now forces this water into
the highway.
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Existing ground probably capable of conveying
50-60 cfs before water reaches traveled way
Reduced carrying capacity as a result of the
curb and gutter will carry maybe 10-15 cfs
before water flows into traveled way
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Even in a minor storm, note how little
runoff it takes to pond to edge of
traveled way
But nowletsput in some curb and gutter!
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Recent Problem # 2
In the desert, our old two-lane rural roads
would pond to a depth of four inches or so
before water would flow across the road.
Now that weve added two lanes and ashoulder, it ponds to a foot and a half!
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Water ponds to only a
few inches depth
before spilling overcenterline
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gain, water ponds to only a few inches depth
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But now, lets add two twelve
foot lanes (giving us three) at
2% crossfall, a ten foot
shoulder at 5% crossfall, andlook how deep the water
ponds!
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A More Serious Recent Problem:
New development, while retarding the
100-year storm to less than pre-
development conditions, has increased the
flow from small storms. The increased flowfrom these small storms is KILLING us!
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The flood routing calculations showed this basinwould work just fine!(Did the outlet plug?)
Were the Contractors BMPs functioning properly
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However, the 5-yearpost-development runoff
of 85 cfs was NOT
reduced to the pre-
development 5-yearrunoff of 50 cfs!
The basin was designed to
reduce the 100-year Q from 250
cfs post-development down to
175 pre-developmentand willwork just fine in a 100-year
storm!
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So where did the extra
concentratedrunoff fro
the basin outlet go?
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This is how it looked when it got to
the next major highway junction
er e s orm
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er e s orm
S l ti l ki t
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Same location looking upstream
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Existing Problems you MAY be
Asked to Help Solve
Malfunctioning drainage facilities
Non-existent facilities
Safety hazards (whether drainage-related ornot)
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ll your development increase the flow in this ditch? If so, you may b
l t t
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culvert entrance
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pstream or downstream,
oure probably going toave to do something here!
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(Yes, we may ask you to help fix this,
too, even though we did it)
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No comment!!!
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Drainage Report Submittal
Guidelines for District 8
Transportation Projects
Floodplain Analysis (if Applicable) Preliminary Drainage Report
Final Drainage Report
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34/47 Estimated duration of traffic interruption for 100-year event ______ hours.
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Estimated value of Q100 flood damages (if any) - moderate risk level.A. Roadway $________B. Property $_________
Total $____________
Assessment of Level of RiskLow ___ Moderate ___ High ___For High Risk projects, during design phase, additional Design Study Risk Analysis maybe necessary to determine design alternative.
PREPARED BY:
_____________________________________________ ____________________Signature - Dist. Hydraulic Engineer Date(Item numbers 3, 4, 5, 7, 9)
Is there any longitudinal encroachment, significant encroachment, or any support ofincompatible Floodplain development? No ____ Yes ____
If yes, provide evaluation and discussion of practicability of alternatives in accordancewith 23 CFR 650.113
Information developed to comply with the Federal requirement for the LocationHydraulic Study Shall be retained in the project files.
_____________________________________________ ____________________
Signature - Dist. Project Engineer Date(Item numbers 1, 2, 6, 8)
Responsible Engineer Preparing Plans
Caltrans Project Engineeraltrans Project Engineer
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SUMMARY FLOODPLAIN ENCROACHMENT REPORT
Dist. __________Co. _________ Rte.__________ P.M. _________________________
Project No.: _________________________ Bridge No. ______________________
Limits: _____________________________________________________________________________________________________________________________________
Floodplain Description: ___________________________________________________
_____________________________________________________________________
No Yes
1. Is the proposed action a longitudinal encroachment of the base floodplain? ___ ___
2. Are the risks associated with the implementation of the proposed action
significant?
___ ___
3. Will the proposed action support probable incompatible floodplain
development?
___ ___
4. Are there any significant impacts on natural and beneficial floodplain values? ___ ___
5. Routine construction procedures are required to minimize impacts on the
floodplain. Are there any special mitigation measures necessary to minimizeimpacts or restore and preserve natural and beneficial floodplain values? If
yes, explain.
___ ___
6. Does the proposed action constitute a significant floodplain encroach-ment as
defined in 23 CFR, Section 650.105(q).
___ ___
7. Are Location Hydraulic Studies that document the above answers on file? If
not explain.
___ ___
PREPARED BY:
______________________________________ __________Signature - Dist. Hydraulic Engineer Date
______________________________________ __________
Signature - Dist. Environmental Branch Chief Date
______________________________________ __________
Signature - Dist. Project Engineer Date
SUMMARY FLOODPLAIN ENCROACHMENT REPORT
Dist. __________Co. _________ Rte.__________ P.M. _________________________Project No.: _________________________ Bridge No. ______________________Limits: _____________________________________________________________________________________________________________________________________Floodplain Description: ___________________________________________________
_____________________________________________________________________
No Yes1. Is the proposed action a longitudinal encroachment of the base floodplain? ___ ___2. Are the risks associated with the implementation of the proposed action
significant?___ ___
3. Will the proposed action support probable incompatible floodplaindevelopment?
___ ___
4. Are there any significant impacts on natural and beneficial floodplain values? ___ ___5. Routine construction procedures are required to minimize impacts on the
floodplain. Are there any special mitigation measures necessary to minimizeimpacts or restore and preserve natural and beneficial floodplain values? Ifyes, explain.
___ ___
6. Does the proposed action constitute a significant floodplain encroach-ment asdefined in 23 CFR, Section 650.105(q).
___ ___
7. Are Location Hydraulic Studies that document the above answers on file? Ifnot explain.
___ ___
PREPARED BY:
______________________________________ __________
Signature - Dist. Hydraulic Engineer Date
______________________________________ __________Signature - Dist. Environmental Branch Chief Date
______________________________________ __________Signature - Dist. Project Engineer Date
Responsible Engineer Preparing PlansProfessional Responsible for Environmental DocumentCaltrans Project Manager
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http://caltrans-opac.ca.gov/publicat.htm
To order by e-mail:
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To Order by Mail or FAX:
State of California
Department of Transportation
Publication Distribution Unit1900 Royal Oaks Drive
Sacramento California 95815 3800
FAX (916) 324-8997
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Caltrans Drafting
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Caltrans BasicTraffic ControlRequirements
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Caltrans Basic SoilCompaction Requirements
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Caltrans Water Quality Requirements
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Caltrans Basic Landscaping Requirements
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and of course Caltrans Drainage Requirements
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Caltrans PlanReview &Encroachment
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Roy H. King, MS, PE
Hydraulics Division, California Department of Transportation
464 West 4th, MS 1065
San Bernardino, CA 92401-1464
Tel. (909) 383-4555