0 getting caltrans to approve your plans (1)

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


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

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