final hydraulics report central federal lands highway division

8/17/2019 FINAL Hydraulics Report Central Federal Lands Highway Division

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Bunker Road and Mitchell RoadFINAL Hydraulics Report

Table of Contents

I. INTRODUCTION ....................................................................................................................... I-1

II. PROJECT BACKGROUND AND DESCRIPTION ................................................................... II-1

Highway Design Improvements II!"Bridge Improvements II!#Hydrualic Improvements II!$%etland Improvements II!$

III. DRAINAGE CRITERIA............................................................................................................ III-1

IV. DATA COLLECTION AND SITE INVESTIGATION................................................................IV-1

V. !DROLOG! ..........................................................................................................................V-1

VI. "INAL !DRAULIC ANAL!SIS .............................................................................................VI-#

&ulverts'I!$(avement Drainage 'I!)

Ditches 'I!)*ur+er (arking &ulvert 'I!,Mitchell Road &ulvert at *tation $-.") 'I!/Rodeo Lagoon Bridge 'I!0

VII. SU$$AR! .............................................................................................................................VII-1

VIII. DRAINAGE CRITERIA RE"ERENCES ................................................................................VIII-1

L%st of "%&'(es

Figure " (ro1ect *egment LocationII!#

L%st of Tables

2a3le " (ro1ect *egment *ummary II!#2a3le # Design (oint Rain+all '!"2a3le $ (roposed Drainage Basins and (eak Discharges '!#2a3le 4 Final &ulvert Analysis 'I!$2a3le 5 Final Inlet Analysis 'I!52a3le ) Final Ditch Analysis 'I!)2a3le , Final *ur+er (arking &ulvert Analysis at *tation "#.-5 'I!,

2a3le / Mitchell Road &ulvert at *tation $-.") 'I!/2a3le 0 *ummary o+ Recommended Design 'II!"

Table of Contents

i


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L%st of A))en*%+es

A))en*%, A 6Hydrologic and Hydraulic Criteria and Computational Methods Technical Memorandum for Bunker and Mitchell Roads

A))en*%, B 6 Hydrology7 Basin Map8 &alculations

A))en*%, C 6 Hydraulics7 &ulverts7 H9!/ Reports8 Ditches : Inlets7 Hydraulic 2ool3o; ReportsA))en*%, D 6


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I. INTRODCTION

!he 'co*e o+ ork i' to *er+or/ eniron/ental7 enineerin7 hdraulic7 eotechnical7 rihto+a7

'urein7 /a**in7 and *ro:ect /anae/ent 'erice' toard' delier o+ a ;5< *lan 'et +or the "ederal

#iha Ad/ini'tration ("#A)7 Central "ederal 6and' #iha ii'ion (C"6#) +or *ro*o'ed

i/*roe/ent' to Golden Gate National Recreation Area (GGNRA)7 Ale=ander Aenue7 Mitchell Road7and Bunker Road.

!he *ur*o'e o+ thi' *ro:ect i' to reha8ilitate the roada'7 con'truct /inor roada idenin7 i/*roe

drainae and 'a+et7 e=tend the le+t turn lane on Ale=ander Aenue at ane' rie7 and con'truct to ne

*arkin area'.

!he *ur*o'e o+ thi' ">NA6 #draulic' Re*ort i' to *roide a 'u//ar o+ the +inal hdraulic

reco//endation' +or Bunker Road and Mitchell Road and Ale=ander Aenue to a ;5< *lan 'et. !he

*reli/inar hdroloic and hdraulic anal'i' *er+or/ed under thi' ta'k u'ed reco//endation' +ro/ theC"6# Trip Report, C"6# CA note'7 a +ield reie in Noe/8er 2010 and A*ril 20117 B&9?'

Preliminary Hydraulics Recommendations Report, B&9?' Rodeo Lagoon Preliminary Hydraulics Recommendations Report 7 and Aer'?' Rodeo Lagoon Bridge Hydraulics and Scour Evaluation.

Introduction

I!"


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II. !RO"#CT $AC%&ROND AND D#'CRI!TION

!hi' *ro:ect ill 8e +unded throuh the "ederal 6and' #iha rora/. !he National ark erice

(N) co/*leted an eniron/ental i/*act 'tate/ent +or the Marin #eadland' and "ort Baker area'. !heRecord o+ eci'ion (RO) a' 'ined on Auu't 117 200;.

*eci+ic hdroloic and hdraulic co/*onent' +or thi' *ro:ect ill include deelo*in the a**lica8le

criteria /e/orandu/7 identi+in and ealuatin the e=i'tin and *ro*o'ed drainae +acilitie'7 'u**ortinthe de'in actiitie' ith ater @ualit reco//endation'7 deelo*in a technical /e/orandu/ to

docu/ent *reli/inar hdraulic reco//endation'7 and *re*arin a dra+t and +inal hdraulic' re*ort +or

delier o+ a ;5< *lan 'et. A 'co*e o+ ork to deelo* the re/ainder o+ the *ro:ect to the 100< *lan 'etleel ill 8e deelo*ed in the +uture.

HI&H( A ) D#'I&N I*!RO+#*#NT'

!he eneral 'co*e o+ roada i/*roe/ent' i' the reha8ilitation o+ a**ro=i/atel 3.24 /ile' o+ roada.

Minor i/*roe/ent' ill 8e /ade on Bunker Road a't. Guardrail'7 'in *anel'7 and 'in 'u**ort'

ill al'o 8e u*raded to /eet current 'tandard'.

Bunker Road con'i't' o+ three 'e/ent',

• e/ent 1, 0.20 /ile' on Old Bunker Road 8einnin at the inter'ection o+ Mitchell Road and

Bunker Road e't and continue' northe't *a't the Marine Ma//al Center.

• e/ent 2, 2.53 /ile' on Bunker Road e't 8einnin at the inter'ection o+ Mitchell Road and

Old Bunker Road and *roceed' ea't to the BakerBarr !unnel.

• e/ent 3, 0.5$ /ile' on Bunker Road a't 8ein' at Murra Circle and *roceed' northe't to

the BakerBarr !unnel. Onl /inor i/*roe/ent' to correct de+iciencie' (re*lace uardrail7re'tri*e7 and re*lace /i''in centerline rai'ed re+lector') ill 8e included in thi' *ro:ect.

!hi' *ro:ect al'o include' 0.50 /ile o+ ork on Mitchell Road7 hich 8ein' :u't e't o+ Rodeo Beach

and e=tend' to the inter'ection o+ Bunker Road and Old Bunker Road. ork on Mitchell Road ill 8eli/ited to a**ro=i/atel 2700 +eet o+ roada +ro/ the inter'ection to the un*aed oer+lo *arkin

area on Rodeo Beach.

A ne *arkin lot ill 8e con'tructed ad:acent to Bunker Road e't and /ith Road and a 'econd

*arkin lot i' *ro*o'ed alon Old Bunker Road near the Marine Ma//al Center. !he'e *arkin lot' ill

hae a *aed drie7 acce''i8le *arkin '*ace'7 and rael or *er/ea8le *arkin area'.

!he le+tturn lane on Ale=ander Aenue to ane' rie ill 8e e=tended to /eet A/erican A''ociation

o+ tate #iha and !ran'*ortation O++icial' =AA#!O) de'in 'tandard'. !hi' ill re@uire a rock cuton Ale=ander Aenue to iden the roada and acco//odate the e=tended turn lane. ane' rie ill

8e realined at the inter'ection o+ Ale=ander Aenue to +or/ a !inter'ection.

GGNRA i' the /aintainin aenc +or thi' *ro:ect7 e=ce*t on Ale=ander Aenue7 hich i' /aintained 8Caltran' and the Golden Gate Bride7 #iha7 and !ran'*ortation i'trict (GGB#!).

!a8le 1 include' a 'u//ar o+ the *ro:ect 'e/ent' and "iure 1 'ho' the *ro:ect location.

Project Background and Description

II!"


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Roa* "'n+t%onal Class%f%+at%on Te((a%n T)eSt('+t'(es on

Se&ent

>ld Bunker Road7

*egment "

&lass II7 &onnector (ark

Road

Rolling 4R None

Bunker Road ?%est@7*egment #

&lass I7 (rincipal (ark Flat to Rolling 4RRodeo Lagoon

BridgeBunker Road ?


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H)DRA L IC I*!RO+#*#NT'

ithin the roada i/*roe/ent'7 deteriorated culert' and dro* inlet' ill 8e re*laced and u*'iDed a'

needed. All 'olid inlet coer' ill 8e re*laced ith 'lotted rate inlet coer' +or /aintenance.

Althouh there i' not an identi+ied drainae *ro8le/ in the area o+ the *ro*o'ed *arkin lot at Bunker

Road e't and /ith Road7 an atte/*t ill 8e /ade to i/*roeEre'tore the natural 'heet +lo draininnorthard +ro/ Bunker Road to /ith Road. !he *arkin lot i' ill 8e de'ined to re'toreE/aintain

drainae into the ri*arian area.

(#TLAND I*!RO+#*#NT'

!he e=i'tin 'ur+er *arkin lot o++ o+ Mitchell Road near Rodeo Beach ill 8e raded to acco//odate

*ro*o'ed etland re'toration. !he e=i'tin culert at the *ro*o'ed etland re'toration doe' not *roide

ade@uate coneance and the culert and rate inlet ill 8e re*laced.

reli/inar de'in' +or thi' *ro:ect al'o ine'tiated the re*lace/ent o+ an e=i'tin culert cro''in

a**ro=i/atel 0.3 /ile ea't o+ the 'ur+er *arkin lot on Mitchell Road. !he *reli/inar de'in included a

+our culert ''te/ to acco//odate +uture etland re'toration. #oeer7 due to +undin and 'chedulino+ the etland re'toration7 acco//odation o+ the +uture etland re'toration i' not 8ein incor*orated ith

the Mitchell Road i/*roe/ent' a''ociated ith thi' *ro:ect.

Project Background and Description

II!$


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III. DRAINA CRIT#RIA

!he drainae criteria /e/orandu/7 #droloic and #draulic Criteria and Co/*utational Method'

!echnical Me/orandu/ +or Bunker Road and Mitchell Road "#A ro:ect, GOGA 104(1) & 105(2)a' co/*leted e*te/8er 2%7 20107 8a'ed on de'in 'tandard' outlined in "ederal 6and' #iha

Project Development and Design Manual (M) (200%) and Caltran' Hig!ay Design Manual (200$).

A co* o+ the criteria /e/orandu/ i' included in A**endi= A.

All 'e/ent' o+ Mitchell Road and Bunker Road utiliDe C"6#?' criteria. !o acco//odate *ro*o'ed

etland re'toration *ro:ect' ad:acent to Mitchell Road7 additional re+erence a' *roided 8 the

+olloin *reiou' re*ort',

• "etland Processes and #pportunities $or Restoration in te Rodeo Lagoon "atersed 7 Ma 200$

• "etland Ha%itat &anges in te Rodeo Lagoon "atersed, Marin &ounty, &'7 Octo8er 2004

• Hydrologic Regime, (egetation, )mpact 'nalysis, and Restoration &oncepts $or te Rodeo Beac

"etland comple*+ olden ate -ational Recreational 'rea, &ali$ornia, e*te/8er 200%

Drainage Criteria

III!"


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I+. DATA COLL#CTION AND 'IT# IN+#'TI&ATION

A 'ite in'*ection occurred in Noe/8er 2010 and A*ril 2011. !he'e +ield reie' '*eci+icall addre''ed,

eri+ication o+ drainae *attern'7 deter/ination i+ e=i'tin 'tor/ ''te/' e=i't at the Marine Ma//alCenter and ridin 'ta8le'7 the need to re*lace inlet' at inter'ection o+ Old Bunker Road and Bunker Road

e't7 e=i'tin inlet cloin i''ue'7 hether the re'tored ditche' 'hould 8e *aed or eetated7 out+all'

that ere not identi+ied on the 'ure7 and the need +or additional inlet'. Re'ult' o+ the Noe/8er 2010

i'it are docu/ented in B&9?' Preliminary Hydraulics Recommendations Report . #draulic re'ult'and di'cu''ion' o+ the A*ril 2011 i'it are docu/ented in thi' re*ort.

Data Collection and 'ite In#estigation

I'!"


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+. H)DROLO&)

#droloic anal'i' +or Bunker Road and Mitchell Road a' deter/ined u'in the Rational MethodF the

anal'i' +or Rodeo 6aoon Bride u'ed trea/tat and rere''ion e@uation' 8ecau'e the 8ride ha' adrainae area reater than 200 acre'. !he hdroloic anal'i' +or Rodeo 6aoon Bride doe' not include

+lo attenuation or detention e++ect' o+ Rodeo ond u*'trea/ o+ Rodeo 6aoon Bride. e'in rain+all

u'ed +or thi' anal'i' i' 8a'ed on criteria o8tained +ro/ the National Oceanic and At/o'*heric

Ad/ini'tration (NOAA) and rain+all de*thduration+re@uenc data o8tained +ro/ Cali+ornia e*art/ento+ ater Re'ource' +ro/ the Marin Cit tation ('tation nu/8er 20 5342 35). e'in oint Rain+all

alue' +or the 'ite i' 'hon in !a8le 2. !he'e cure' are u'ed ith the Rational Method +or the

hdroloic co/*aratie anal'i' *er+or/ed a' *art o+ the drainae calculation' and are in A**endi= B.

Table 0Des%&n Po%nt Ra%nfall

Ret'(n Pe(%o*1-o'( 2-o'( 03-o'( =inches =inches =inches

#!year -)4 "#) "0#5!year -0" ",, #)0

"-!year "-/ #"" $##

5-!year "4) #/) 4$4

"--!year ")# $") 4/"

ater'hed 8a'in' ere delineated u'in 'ureed to*ora*h and -.. Geoloical ure (-G) uad/a*' here 8a'in' e=tended 8eond the 'ureed to*ora*h. !a8le 3 'u//ariDe' 8a'in' alon the

*ro:ect. Ba'in' 'hon in !a8le 3 and on the 8a'in /a* +ocu' on hdraulic reco//endation' *re'ented in

the Preliminary Hydraulics Recommendations Report . Area' not delineated t*icall drain to e=i'tin

ditche'7 inlet' or 'tor/ drain' and are not e=*ected to need i/*roe/ent'. A 8a'in /a* i' in A**endi= B.

Hydrology

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Table #P(o)ose* D(a%na&e Bas%ns an* Pea4 D%s+a(&es

Bas%n IDA(ea 516 507 576 5166

=acres =c+s =c+s =c+s =c+s

A" #0) ")5 #"0 #), $"-

A# -55 -4- -54 -)) -,) A$ ,05 )-, /-5 0/$ ""$0

B" "", -,5 "-- "## "4#

&" 040 4-$ 5$5 )5$ ,5/

D" )004 #$-) $-)" $,$" 4$#$

D# $#5 "", "55 "/0 #"0


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+I. FINAL H)DRALIC ANAL)'I'

!he ;5< de'in hdraulic anal'i' i' 8a'ed on the B&9 Preliminary Hydraulics Recommendations Report and B&9 Rodeo Lagoon Preliminary Hydraulics Recommendations Report and 'u8'e@uent

coordination ith C"6#. A**ro=i/atel 0 hdraulic 'tructure' hae 8een identi+ied alon the

corridor. !he 'co*e o+ thi' *ro:ect include' the ealuation o+ 'een to eleen 8a'in' and the hdraulic'tructure' included in each. >n eneral7 'olid inlet coer' ill 8e re*laced ith 'lotted dro* inlet'7'tandard dro* inlet' ill 8e added7 culert' in *oor condition or under'iDed ill 8e re*laced ith

a**ro*riate 'iDe' 8a'ed on the criteria outlined +or the *ro:ect7 and *aed ditche' ill 8e ree'ta8li'hed.

Additional culert' on Mitchell Road are re@uired to acco//odate *ro*o'ed etland re'toration.Bunker Road e't +ollo' de'in criteria +or lo 'tandard road'.

itch and inlet i/*roe/ent' ere ealuated u'in "#A?' #draulic !ool8o= er'ion 2.1. itchca*acit a' de'ined 8a'ed on the 10ear de'in 'tor/. ro*o'ed ditch eo/etr con'i't' o+

eetated Hditch ith 1,4 (H,#) 'ide'lo*e' and *aed atera' ith 1,$ (H,#) +ront 'lo*e and

aried 8ack 'lo*e'. ro*o'ed dro* inlet i/*roe/ent' to cro'' culert' ere de'ined 8a'ed on the 25

ear de'in 'tor/ u'in "#A?' #draulic !ool8o=.

Cro'' culert' ere de'ined 8a'ed on the 25ear de'in 'tor/ u'in "#A?' #I% er'ion .2.

Cro'' culert' to 8e re*laced ill u'e end treat/ent' to increa'e e++icienc7 e/8ank/ent 'ta8ilit7ae'thetic' and 'a+et +or ehicle'.

C L +#R T '

urin the A*ril 2011 +ield reie7 N re@ue'ted that culert' di'charin into the laoon hae a *i*eculert di''i*ator a' the outlet end treat/ent. Cro'' culert' and driea culert' alon the *ro:ect

are 'u//ariDed in !a8le 4. All *ro*o'ed cro'' culert' are located on Bunker Road and ill hae

culert *rotection 8 /ean' o+ a +lared end 'ection' ith *laced ri*ra* at the culert end 'ection or aculert di''i*ator.

Table 3"%nal C'l8e(t Anals%s

Roa*9a D%aete( Velo+%t Des%&nStat%on

Bas%n ID=inches =+ps :;D<

Coent

$0./# A" #4 55$ -$5 Replace with HD(


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>n 'eeral location' the C"6# Trip Report ha' reco//ended addin concrete all' to e=i'tinculert' to conert to a 'tandard dro* inlet. o/e location' hae 'ealed inlet coer' and need to 8e

re*laced ith a rate inlet. !he 'ure ha' identi+ied /o't o+ the e=i'tin culert' a' 1$inch

rein+orced concrete *i*e (RC). !he /ini/u/ *i*e 'iDe +or cro'' culert' i' 24 inche' (or e@uialent)and 1% inche' (or e@uialent) +or driea culert'. Becau'e o+ the *ro*o'ed roada idenin7 'o/e

culert' ill need to 8e re*laced or e=tendedF there+ore7 the'e culert' are reco//ended to 8e re*lacedin addition to addin rate inlet'.

=i'tin culert' at a**ro=i/ate 'tation' 3;J%27 43J07 and 45J3$ ill need to 8e e=tended due to the

*ro*o'ed roada ideninF there+ore it i' reco//ended to re*lace ith 24inch hih den'it

*olethlene (#) and add dro* inlet'. i*e culert di''i*ator ith a rolled ero'ion control *roductill 8e *laced at the culert outlet.

>t i' reco//ended to re*lace the e=i'tin 3$inch RC at a**ro=i/ate 'tation 4$J5; due to the *ro*o'ed idenin. >t i' reco//ended to re*lace ith 3$inch # and add a headall to the

entrance and *i*e culert di''i*ator ith a rolled ero'ion control *roduct at the e=it.

!he driea culert located at a**ro=i/ate 'tation %%J%2 and ;2J2 ill 8e re*laced ith a 24inch

#7 +lared end 'ection'7 and *laced ri*ra* at the e=it. !hi' culert carrie' o++'ite drainae to the

roada.

Ba'ed on the A*ril 20117 the e=i'tin culert' at a**ro=i/ate 'tation 11;J%7 152J217 and 15%J50 ill

not re@uire re*lace/ent a' *reiou'l reco//ended. At the'e location'7 the culert +unction' and ill

re/ain in *lace. !here a' no indication o+ 'courin7 culert eatherin7 or hih 'edi/entation.

Alon the corridor a 'tandard dro* inlet ill 8e added to cro'' culert' a' di'cu''ed a8oe and at 'o/elocation' 'ealed inlet coer' ill 8e re*laced ith rate inlet'. !he anal'i' a' 8a'ed on the 25earde'in 'tor/ and re'ult' are 'hon in !a8le 5. Caltran' tandard etail 37 !*e G1 +or /edianinlet' i' reco//ended at the'e location'.

+inal Hydraulic /nalysis

'I!4


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Table 7"%nal Inlet Anals%s

Lo+at%onRoa*9a

Bas%n IDDe)t at S)(ea* at

CoentsStat%on Inlet =+eet Inlet =+eet

>ld Bunker

Road

$"-.#5 A$ -$$ #)) Remain as is

$"-.,- A# -"5 "#/ Restore

Bunker

Road

$0./# A" -#) #-4 Remove : replace

4$.-, B" -#/ #"# Remove : replace

45.$) &" -#) #-# Remove : replace

)$.0, n'tall inlet7 /etal rate. !he e=i'tin

'iDe o+ the inlet' ha' 8een *roided in the con'truction *lan 'et.

!he dro* inlet at 'tation %J; ill re/ain in *lace and a' i'.

A dro* inlet ill 8e added to the e=i'tin culert at 'tation 12$J;2 and 1$1J$2.

Cur8 inlet' at 'tation 13$J54 and 13J24 are to 8e re*laced 8ecau'e o+ the idenin and re*lace/ent

o+ cur8 and utter.

All rate' ill 8e 8iccle 'a+e rate'.


'I!5


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!A+# * #NT DRAINA

!he *lan 'et 'ho' *ro*o'ed cur8 and utter alon Old Bunker Road7 8ut no additional drainae

reco//endation' hae 8een /ade +or thi' 'e/ent.

DITCH#'

!he +inal ditch anal'i' reco//end' ditch reconditionin in eetated area' and re*lacin *aed

ditche' alon Old Bunker Road a' 'hon in !a8le $. !he *ro*o'ed eo/etr con'i't' o+ a eetated

Hditch ith 1,4 (H, #) 'ide 'lo*e' ith a /ini/u/ de*th o+ 0.50 +oot7 a *aed Hditch ith 1,$ (H,

#) +ront and 1,3 (H, #) 8ack 'lo*e' ith a /ini/u/ de*th o+ 0.50 +oot7 and a *aed atera ith1,10 (H, #) to the cur8 ith a /ini/u/ de*th o+ 0.30 +oot.

Table 2"%nal D%t+ Anals%s

Bas%nDes%&n $%n%' "(ont =

Velo+%tLo+at%on Roa*9a Stat%on

IDDe)t Const('+te* Ba+4

=+psL%n%n&

=+eet De)t =+eet S>S ='7H

>ld Bunker Road

$-4.5# to $"-.#5 A$ -45 -5- "7) : "7$ ,)- (aved

$"-.#5 to $"-.,- A# -"5 -5- "7) : "7$ 4#" (aved

$"-.,- to $"$.05 A" -#) -5- "7) : "7$ )$- (aved

$"$.05 to $0./" A" -#) -5- "7) : "7$ )$- (aved

Bunker Road

$0./4 to 4$.-5 B" -#/ -$-"7"- :

"7#"/5

(avedwaterway

4$.-, to 45.$) &" -)- -5- "74 : "74 #,) 'egetated

45.$) to 4).50 D" -$, -5- "74 : "74 #-$ 'egetated

)$.0, to )/.5$


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At a**ro=i/ate 'tation 44J5 the e=i'tin driea culert ill 8e re/oed and re*laced ith the *ro*o'ed ditch to e=tend to the *ro*o'ed dro* inlet at 'tation 45J3$.

itch reconditionin i' reco//ended at 'tation $3J; to %5J0;. !here are +ie relie+ culert' ithinthi' rane.

!here i' a 8io'ale located 8eteen 'tation' %5J0; to ;2J00 that 'hould not 8e di'tur8ed.

itch reconditionin i' reco//ended at 'tation' ;2J;5 to ;%J007 11;J% to 123J2;7 12$J;2 to

131J007 and 152J21 to 1$1J$2

'R F #R ! AR%IN& CL+#RT

!he e=i'tin culert located at Mitchell Road tation 12J05 con'i't' o+ to 24inch CM. !he e=i'tin

u*'trea/ condition include' a rate inlet located north o+ Mitchell Road7 8eteen the 'ur+er *arkin lotand "ort Cronkhite *arkin lot. !he don'trea/ condition include' the to 24inch CM' *ro:ectin

+ro/ +ill ith a '*ill heiht o+ a**ro=i/atel 3 to 4 +eet.

etland re'toration o+ the e=i'tin 'ur+er *arkin lot *ro*o'e' to e=caate the *arkin 'ur+ace and

e'ta8li'h etland eetation. N ha' e=*re''ed concern' that a concentrated culert cro''in /a

*roduce headcuttin throuh the etland.

!a8le *roide' a 'u//ar o+ the hdraulic anal'i' +or the e=i'tin and *ro*o'ed culert'.

Table ?"%nal S'(fe( Pa(4%n& C'l8e(t Anals%s at Stat%on 10@67

D%aete( Velo+%t Des%&n%n+es

Bas%n ID=+ps :;D<

Coent

#!#4@ &M(


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Additional hdraulic 'tructure' could 8e added to enhance the etland re'toration. !o *roide a ider

di'tri8ution o+ +lo +ro/ the etland' throuh Mitchell Road7 a loner rate inlet co/*le= ould 8e

con'tructed. !he *ro*o'ed to7 "#A Catch Ba'in7 !*e 1 inlet' a' de'ined to acco//odate the25 *eak di'chare ithout oerto**in the e=i'tin Mitchell Road. Another alternatie to *roide a

ider di'tri8ution o+ +lo ould 8e con'truction o+ a *orou' rock road *ri'/ in Mitchell RoadFhoeer7 rock road *ri'/ in'tallation ould re@uire e=caation and recon'truction o+ the e=i'tinroada e/8ank/ent. edi/ent cloin o+ the rock road *ri'/ /a al'o re@uire 'ini+icant

/aintenance +or the *orou' rock road *ri'/ to +unction. !he rock road *ri'/ ould al'o re@uire rock

ri*ra* alon the entire lenth o+ the *ri'/ alon the 8each'ide roada e/8ank/ent. ue to the

*otential co't and /aintenance concern'7 a rock road *ri'/ i' not reco//ended.

*ITCH# L L ROAD CL+#RT AT ' T AT IO N ,-/0

!he e=i'tin culert located at Mitchell Road tation 30J1$7 +or/erl knon a' the etland elta

Culert con'i't' o+ a 'inle 24inch 8 32inch CM. !he e=i'tin u*'trea/ condition include' aconcrete headall 'tructure. !he don'trea/ condition could not 8e o8'ered due to e=i'tin laoon

eetation 8ut i' a''u/ed to 8e CM *ro:ectin +ro/ +ill.

!he oriinal intention +or thi' culert a' to re'tore the etland' 8 di'*er'in the +lo di'tri8ution+ro/ the 'inle e=i'tin culert to +our culert' 'e*arated 8 a**ro=i/atel 100 +eet. !o acco//odate

the loered 'ur+ace *ro*o'ed 8 the etland re'toration7 the *ro*o'ed culert' ould 8e 8elo the

hih ater eleation o+ Rodeo 6aoon and could 8e 'u8/ered durin *ortion' o+ the ear. !heloered culert' ould al'o re@uire 'ini+icant don'trea/ e=caation to *roide *o'itie drainae to

Rodeo 6aoon. >n*ut athered durin the 'ite in'*ection (Noe/8er7 2010) included reco//endation

to *roide an o*en8otto/ culert.

"und' +or the etland re'toration *ro:ect ould 8e 'ecured throuh a di++erent *ro:ect. >n the interi/7

the +our culert' ere con'idered a' *lace holder' +or the antici*ation o+ the etland re'toration *ro:ect to /ini/iDe i/*act' to Mitchell Road. #oeer7 to do thi' ould re@uire /a:or radin and

utilit relocation e++ort'. urin the A*ril 2011 +ield di'cu''ion occurred in reard' to the con'truction

'chedulin. Ba'ed on aaila8le +und'7 it a' deter/ined that the etland re'toration cannot 8e

acco/*li'hed ith the recon'truction o+ Mitchell Road and that interi/ de'in con'ideration' ouldnot 8e deelo*ed. A' a re'ult7 the culert at thi' location ill not +unction a' a etland re'toration

culert7 8ut a' a 'tor/ater coneance culert.

!a8le % *roide' a 'u//ar o+ the hdraulic anal'i' +or the e=i'tin and *ro*o'ed culert'.

Table

$%t+ell Roa* C'l8e(t at Stat%on #6@12

D%aete( Bas%n Velo+%t Des%&n%n+es ID =+ps :;D<

Coent

$#@;#4@ &M(


18/149


+,' ( flared end sections-Ma"imum H)*D ( %.

ROD#O LA&OON $RID

#draulic and 'cour anal'i' o+ the e=i'tin 8ride ha' 8een conducted to 'iDe rock ri*ra* reha8ilitation.

!he e=i'tin Rodeo 6aoon Bride i' 'u8:ect to contraction and a8ut/ent 'cour. !he a8ut/ent' are *artiall *rotected 8 the e=i'tin rock ri*ra*F hoeer7 the coerae and e=tent o+ the ri*ra* i' not

'u++icient to co/*l ith the reco//endation' o+ "#A uidance docu/ent #C237 Bride courand trea/ >n'ta8ilit Counter/ea'ure'. Additionall7 the Bride >n'*ection Re*ort dated 9ul 200$

reco//end' additional ri*ra* on the don'trea/ 'ide o+ the 8ride. Cla'' 3 ri*ra* i' *ro*o'ed to +ill

oid' o8'ered in the e=i'tin ri*ra*. Additionall7 Cla'' 3 ri*ra* and eote=tile +ilter i' *ro*o'ed

8ehind the e=i'tin 'heet *ile all to *roide additional 'cour and ero'ion *rotection.

reiou' reco//endation' o+ *lacin additional ri*ra* ithin the laoon ere dee/ed unnece''ar 8

C"6# 'ta++. Other than /inor oid' o8'ered in the e=i'tin ri*ra*7 no 'ini+icant 'courin o+ the 8ride ha' 8een o8'ered. !he *lace/ent o+ ri*ra* ithin the laoon a' al'o thouht to 8e an

unnece''ar +ill actiit and unanted i/*act to *otential 404 *er/ittin.


'I!0


19/149


+II. '**AR)

!a8le ; 'u//ariDe' +inal reco//endation' +or thi' *ro:ect to a ;5< de'in. Hditch eo/etr ill 8e1,4 (H,#) 'ide 'lo*e' ith a /ini/u/ de*th o+ 0.5 +eet. Grate inlet' ill u'e Caltran' tandard etail

A7 !*e 24; +or /edian inlet'. ro*o'ed *i*e /aterial i' #. !he'e +inal reco//endation' are

con'i'tent ith the initial reco//endation' +ro/ the B&9 Preliminary Hydraulics Recommendations Report 7 B&9 Rodeo Lagoon Preliminary Hydraulics Recommendations Report and B&9 Bunerand Mitcell Roads Preliminary Hydraulics Report .

Table S'a( of Re+oen*e* Des%&n

Roa*9a Stat%on Lo+at%on "%nal Re+oen*at%ons

"5.-- to "/.-- Mitchell (roposed pavement drains towards e;isting vegetated 3u++er

"#.-5 MitchellReplace e;isting culverts =#!$-@ HD(ld Bunker Recondition e;isting inlet

$"-.,- to $"$.05 >ld Bunker (aved ditch

$"$.05 to $0./">ld Bunkerto Bunker

(aved ditch

$0./# Bunker Replace e;isting culvert =#4@ HD(


20/149


Table S'a( of Re+oen*e* Des%&n

Roa*9a Stat%on Lo+at%on "%nal Re+oen*at%ons

0#.05 Bunker &lean e;isting culvert

0#.05 to 0/.-- Bunker Recondition ditch"-#.05 Bunker Do not distur3 e;isting culvert

"-).#)8 "-/."/ Bunker &lean e;isting culvert

""".#)8 ""4.-$ Bunker Recondition e;isting inlet8 metal grate

""0.,/ Bunker Recondition e;isting inlet8 metal grate

""0.,/ to "#$.#0 Bunker Recondition ditch

"#$.#0 Bunker Recondition e;isting inlet8 metal grate8 clean e;isting culvert

"#).0# Bunker Recondition e;isting inlet8 metal grate

"#).0# to "$".-- Bunker Recondition ditch

"$).548 "$,.#4 Bunker Reset cur3 inlets due to cur3 and gutter modi+ications

"$/.)"8 "$/.,/ Bunker Do not distur3 e;isting culverts

"4,.$$ Bunker Do not distur3 e;isting culvert and headwall

"5#.#" Bunker Recondition e;isting inlet8 metal grate

"5#.#" to "5/.5- Bunker Recondition ditch

"5/.5- Bunker Recondition e;isting inlet8 metal grate

"5/.5- to ")".)# Bunker Recondition ditch

")".)# Bunker Recondition e;isting inlet8 metal grate+,' ( flared end sections-Differs from Preliminary Hydraulics Recommendations Report --Differs from Preliminary Hydraulics Report

!he anal'i' o+ the e=i'tin 'tructure' alon Bunker Road e't7 e/ent 2 a' ealuated 8a'ed on thedrainae criteria /e/orandu/7 #droloic and #draulic Criteria and Co/*utational Method' !echnical

Me/orandu/ +or Bunker Road and Mitchell Road "#A ro:ect, GOGA 104(1) & 105(2)7 e*te/8er 2%7 2010. Reco//endation' +or e=i'tin hdraulic 'tructure' ere *reiou'l /ade +or de+icient

'tructure' identi+ied in a C"6# Trip Report, C"6# CA note'7 +ield reie' in Noe/8er 2010 and

A*ril 20117 B&9 Preliminary Hydraulics Recommendations Report, and B&9 Rodeo Lagoon

Preliminary Hydraulics Recommendations Report .

!he reco//ended culert cro''in to acco//odate *ro*o'ed etland re'toration at the ur+er arkin

lot and etland delta area hae 8een *roided to a ;5< de'in leel 8a'ed on *roided in+or/ation.

'ummary

'II!#


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+III. DRAINA CRIT#RIA R#F#R#NC#'

Cali+ornia e*art/ent o+ ater Re'ource'7 Rain$all Dept/Duration/0re1uency Data $or Marin &ity7

2005.

Caltran'7 Hig!ay Design Manual 7 e*te/8er 200$.

CA RA GOGA 104(1) & 105(2) Reha8 Bunker Road and Mitchell Road co*in "ield Reie7 Ma

th7 200%.

"ederal 6and' #iha7 Project Development and Design Manual 7 March 200%.

"#A7 H2/37 200;.

"#A7 Hydraulic Design Series -o. 47 Octo8er 2002.

"#A7 HE& -o. 56, Hydraulic Design o$ Energy Dissipators $or &ulverts and &annels7 9ul 200$.

"#A7 HE& -o. 57, Design o$ Roadside &annels !it 0le*i%le Linings7 e*te/8er 2005.

"#A7 HDS -o. 7, Hydraulic Design o$ Hig!ay &ulverts7 e*te/8er 1;%5.

"#A7 HE& -o. 237 Bridge Scour and Stream )nsta%ility &ountermeasures, e*te/8er 4889

National Oceanic and At/o'*heric Ad/ini'tration Atla' 27 Holu/e K>Cali+ornia7 reci*itation

"re@uenc Atla' o+ the e'tern -nited tate'7 1;3.

NRC Her'ion 47 "e% Soil Survey, Marin &ounty, &ali$ornia, e*te/8er 2010.

. aid ha7 -nier'it o+ Cali+ornia7 Berkele7 Center +or niron/ental e'in Re'earch7 "etland

Process and #pportunities $or Restoration in te Rodeo Lagoon "atersed, Ma 200$

tri*len7 C.7 R. Gro''iner7 and 9. Collin'7 "etland Ha%itat &anges in te Rodeo Lagoon "atersed, Marin &ounty, &'., Octo8er 2004

"#A7 Bride >n'*ection Re*ort7 Rodeo Lagoon Bridge, Buner Road #ver Rodeo Lagoon, oldenate -ational Recreational 'rea, 9ul 200$

Coo*er7 ol+7 Hydrologic regime, (egetation )mpact 'nalysis, and Restoration &oncepts $or te Rodeo Beac "etland comple*+ olden ate -ational Recreation 'rea, &ali$ornia7 e*te/8er 200%

Drainage Criteria References

'III!"


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TECNICAL $E$ORANDU$

TO> Nate Allen C"LD P(o/e+t $ana&e( $att :essell P.E. PBS=J P(o/e+t $ana&e(

"RO$> Jos ollon PBS=J :ate( Reso'(+es En&%nee( Ta K%(4b(%*e PBS=J :ate( Reso'(+es En&%nee(

DATE> Se)tebe( 0 0616

SUBJECT> *(olo&%+ an* *(a'l%+ C(%te(%a an* Co)'tat%onal $eto*s Te+n%+al$eo(an*' fo( B'n4e( an* $%t+ell Roa*s":A P(o/e+t> GOGA 1631 = 1670

1.6 INTRODUCTION

!he co*e o+ ork i' to *er+or/ eniron/ental7 enineerin7 hdraulic7 eotechnical7 rihto+a7

'urein7 /a**in7 and *ro:ect /anae/ent 'erice' toard' delier o+ a 0< *lan 'et +or the "ederal#iha Ad/ini'tration7 Central "ederal 6and' #iha ii'ion (C"6#) +or *ro*o'ed i/*roe/ent'

to Gold Gate National Recreation Area (GGNRA)7 Ale=ander Aenue7 Mitchell and Bunker Road'.

!he *ur*o'e o+ thi' *ro:ect i' to reha8ilitate the roada'7 con'truct /inor roada idenin7 i/*roedrainae and 'a+et7 e=tend the le+t turn lane on Ale=ander Aenue at ane' rie7 and con'truct a ne

*arkin area.

!he *ur*o'e o+ thi' #droloic and #draulic Criteria and Co/*utation Method' !echnical

Me/orandu/ i' to *roide a 8rie+ 'u//ar o+ the a**lica8le criteria that ill 8e a**lied to the de'in

actiitie' +or *ro*o'ed i/*roe/ent' +or Bunker and Mitchell Road'. An additional technical/e/orandu/7 Rodeo 6aoon !echnical Me/orandu/ ill 8e *roided +or the Rodeo 6aoon Bride

and to Mitchell Road culert' that ill 'erice *ro*o'ed etland7 eniron/ental7 and etland

re'toration. !he additional /e/o ill *roide an other '*eci+ic de'in criteria deelo*ed throuhcoordination ith N and eniron/ental *er'onnel +or tho'e three drainae 'tructure'.

0.6 PROJECT BACKGROUND AND DESCRIPTION

!hi' *ro:ect ill 8e +unded throuh the "ederal 6and' #iha rora/. !he National ark erice(N) co/*leted an niron/ental >/*act tate/ent +or the Marin #eadland' and "ort Baker area'. !he

Record o+ eci'ion (RO) a' 'ined on Auu't 117 200;.

*eci+ic hdroloic and hdraulic co/*onent' +or thi' *ro:ect ill include deelo*in the a**lica8le

criteria /e/orandu/7 identi+in and ealuatin the e=i'tin and *ro*o'ed drainae +acilitie'7 'u**ortinthe de'in actiitie' ith ater @ualit reco//endation'7 deelo*in a technical /e/orandu/ to

docu/ent *reli/inar hdraulic reco//endation'7 and *re*arin a dra+t and +inal hdraulic' re*ort +or

4)-" D2& Boulevard8 *uite ,-- L Denver8 &> /-#$, L (hone7 $-$!##"!,#,5 Fa;7 $-$!##"!,#,)


23/149

Hydrologic and Hydraulic Criteria and Computational Methods'eptember 01$ 022

Page 0 of 0

delier o+ a 0< *lan 'et. A co*e o+ ork to deelo* the re/ainder o+ the *ro:ect to the 100< *lan 'et

leel ill 8e deelo*ed in the +uture.

0.1 IG:A! DESIGN I$PROVE$ENTS

!he eneral 'co*e o+ roada i/*roe/ent' i' reha8ilitation o+ a**ro=i/atel 3.24 /ile' o+ roada.

Minor i/*roe/ent' ill 8e /ade Bunker Road a't. Guardrail'7 'in *anel'7 and 'ih 'u**ort' illal'o 8e u*raded to /eet current 'tandard'.

Bunker Road con'i't' o+ three 'e/ent'.

M e/ent 1, 0.20 /ile' on Old Bunker Road 8ein' at the inter'ection o+ Mitchell Road andBunker Road e't and continue' northe't *a't the Marine Ma//al Center

M e/ent 2, 2.53 /ile' on Bunker Road e't 8ein' at the inter'ection o+ Mitchell Road andOld Bunker Road and *roceed' ea't to the BakerBarr !unnel.

M e/ent 3, 0.5$ /ile' on Bunker Road a't 8ein' at Murra Circle and *roceed' northe't tothe "ort Baker !unnel. Onl /inor i/*roe/ent' to correct de+iciencie' (re*lace uardrail7re'tri*e7 and re*lace /i''in centerline rai'ed re+lector' ill 8e included in thi' *ro:ect.

!hi' *ro:ect al'o include' 0.50 /ile' o+ ork on Mitchell Road7 hich 8ein' :u't e't o+ Rodeo Beachand e=tend' to the inter'ection o+ Bunker Road and Old Bunker Road ork on Mitchell Road ill 8e

li/ited to a**ro=i/atel 2700 +t o+ roada +ro/ the inter'ection to the un*aed oer+lo *arkin area

on Rodeo Beach.

A ne *arkin lot ill 8e con'tructed ad:acent to Bunker Road e't and /ith Road. !hi' *arkin lot

ill hae a *aed drie7 acce''i8le *arkin '*ace' and rael or *er/ea8le *arkin area'.

!he le+t turn lane on Ale=ander Aenue to ane' rie ill 8e e=tended to /eet AA#!O de'in'tandard'. !hi' ill re@uire a rock cut on Ale=ander Aenue to idened the roada and acco//odate

the e=tended turn lane. ane' rie ill 8e realined at the inter'ection Ale=ander Aenue to +or/ a!inter'ection.

GGNRA i' the /aintainin aenc +or thi' *ro:ect7 e=ce*t on Ale=ander Aenue to hich Caltran' and

Golden Gate Bride7 #iha7 and !ran'*ortation i'trict (GGB#!) are the /aintainin aenc.

!a8le 1 'ho' the *ro:ect location and "iure 1 include' a 'u//ar o+ the *ro:ect 'e/ent'.


24/149


Page 3 of 0

Ta1le /

!ro2ect 'eg3ent 'u33ary

Roa* "'n+t%onal Class%f%+at%on Te((a%n T)e

St('+t'(es

on Se&ent>ld Bunker Road7

*egment "&lass II7 &onnector (ark

RoadRolling $R. None

Bunker Road ?%est@7*egment #

&lass I7 (rincipal (ark Flat to Rolling $R.RodeoLagoonBridge

Bunker Road ?


25/149


26/149


Page . of 0

Ta1le ,

Design !oint Rain5all

Ret'(n Pe(%o*1-o'( 2-o'( 03-o'(

%n+es %n+es %n+es#!year -)4 "#) "0#

5!year -0" ",, #)0

"-!year "-/ #"" $##

5-!year "4) #/) 4$4

"--!year ")# $") 4/"

ater'hed 8a'in delineation' ill 8e *re*ared u'in aaila8le -.. Geoloical ure (-G) uad

/a*' and 'ureed to*ora*h.

oil 'ure data and /a*' ere o8tained +ro/ the National Re'ource' Con'eration erice (NRC).

Ba'ed on the NRC 'oil 'ure o+ the *ro:ect area7 the 'oil' in the icinit o+ Bunker Road are *art o+ the!a/al*ai'Barna8e Hariant7 CronkhiteBarna8e Co/*le= and Kerorthent'-r8an 6and Co/*le=. All o+

the 'oil' are cla''i+ied a' a !*e C hdroloic 'oil rou*. !he'e 'oil' hae a 'lo in+iltration rate

hen thorouhl et. !he'e con'i't chie+l o+ 'oil' hain a laer that i/*ede' the donard /oe/ent

o+ ater or 'oil' o+ /oderatel +ine te=ture or +ine te=ture. !he'e 'oil' hae a 'lo rate o+ atertran'/i''ion (NRC7 2010).

Additional 'oil t*e' alon Bunker Road include #u/a@ue*t' and Rodeo Cla 6oa/. !he'e 'oil' arecla''i+ied a' !*e hdroloic 'oil rou*. !he'e 'oil' hae a er 'lo in+iltration rate hen

thorouhl et. !he'e con'i't' chie+l o+ cla' that hae a hih 'hrink'ell *otential7 'oil' that hae a

hih ater ta8le7 'oil' that hae a cla*an or cla laer at or near the 'ur+ace7 and the 'oil' that are

'hallo oer nearl i/*eriou' /aterial (NRC7 2010).

Near the icinit o+ Mitchell Road and in 'o/e area' o+ Bunker Road7 there ere area' ere NRC did

not identi+ 'oil'. >n'tead a +ill /aterial7 Kerorthent' a' delineated that doe' not hae a NRC 'oilratin.

!he *ro:ect li/it' doe' not lie ithin a "ederal /erenc Manae/ent Aenc ("MA) /a**ed +lood

Done and can 8e +ound ithin "lood >n'urance Rate Ma* anel nu/8ered 0$041C0510 and0$041C052%. !he /a:orit o+ the *ro:ect lie' ithin a National Recreation Area or Militar

Re'eration and i' un/a**ed 8 "MA.

7.6 ROAD:A! !DRAULICS

!he de'in o+ roada hdraulic 'tructure' i' 8a'ed on C"6#?' roada cla''i+ication. !here are to

roada cla''i+ication' u'ed in thi' *ro:ect de*endin on the 'e/ent.

#ih tandard, i+ an o+ the +olloin condition' a**l to the 'ection o+ the *ro:ect,

M e'in '*eed 45 /*h

M e'in Aerae ail !ra++ic (A!) 1500

M e'inated a' a critical acce'' road


27/149


Page 5 of 0

6o tandard, All other road'

!a8le 3 *roide' a 'u//ar o+ the roada cla''i+ication.

Ta1le ,

FH(A Roadway Classi5ication 'u33ary

Roa*S)ee*

ADTC(%t%+al Roa*9a

) A++ess Class%f%+at%on

Bunker Road7*egment "

#5!$5 4-- No Low *tandard

Bunker Road7*egment #

#5!$5 ""-- No Low *tandard

Bunker Road7*egment $

#5 4)-- No High *tandard

Mitchell Road #5 "--- No Low *tandard

Ale;ander Avenue 4- ,)-- 9es High *tandard

7.1 CULVERTS

=i'tin culert' ill 8e ealuated +or the 107 257 50 and 100ear eent' +or *otential encroach/ent'

to deter/ine ater 'ur+ace eleation' and deter/ine hether the /eet current criteria. Culert' ill 8e

analDed u'in #I% Culert Anal'i' 'o+tare.

Caltran' *re+erence +or *i*e /aterial i' rein+orced concrete *i*e7 8ut alternatie /aterial' are al'o

con'idered. C"6# *re+er' to u'e corruated /etal *i*e to /aintain hi'toric *ro*ertie' throuhout the

*ark. Ba'ed u*on recent drainae i/*roe/ent' in the icinit o+ thi' 'tud hich u'ed RC or *la'tic *i*e the'e t*e' ill al'o 'ere a' the *ri/ar /aterial 'election +or thi' *ro:ect. =i'tin culert' ill 8e

ealuated and i+ the do not /eet current criteria7 alternatie' ill 8e reco//ended. =i'tin hdrauliccondition' ill 8e ealuated and docu/ented. "or *ro*o'ed condition'7 culert' ill 8e ealuated and

de'ined 8a'ed on the loe't headater eleation 8a'ed on the criteria 'hon in !a8le 4. >t i'

reco//ended that culert' hae end treat/ent' to increa'e e++icienc7 e/8ank/ent 'ta8ilit7 ae'thetic'and 'a+et +or ehicle'.

!a8le 4 'u//ariDe' the culert re@uire/ent' *er "ederal 6and' #iha?' M unle'' otheri'e

noted.


28/149


Page 6 of 0

Ta1le 6

Culverts

Des%&n C(%te(%a Stan*a(*s

*torm


29/149


Page 1 of 0

7.0 STOR$ DRAINS

Roada drainae criteria +or 'tor/ drain' i' 8a'ed on "#A roada cla''i+ication7 hih 'tandard and

lo 'tandard roada7 and Caltran' roada cla''i+ication o+ a /a:or ur8an arterial route ith *o'ted

'*eed' 45 /*h and under. !a8le 5 'u//ariDe' de'in criteria and 'tandard' +or inlet'7 and !a8le $'u//ariDe' criteria +or 'tor/ drain *i*e de'in *er "ederal 6and' #iha?' M unle'' otheri'e

noted.

Ta1le 7

Inlets 8!ave3ent Drainage9


*torm n!grade7 "-!year *umps7 5-!year

*pread M High *tandard7 *hall not e;ceed $ +eet o+ one travel laneM Low *tandard7 *hall not spread to hal+ o+ one travel lane

Depth M >n!grade7 Depth not to e;ceed the cur3 height or allowa3lespread

M *umps7 Depth not to e;ceed ) inchesM (arking areas7 Inlets ad1acent to cur3s8 the +low depth shall not

e;ceed the cur3 height +or sags the depth o+ +low at the gutter+lowline shall not e;ceed ) inches

Inlet &logging Factor >n!grade7 no clogging +actor8 unless it has previously 3een apro3lem8 i+ clogging is considered minimum is ,-K

*umps7M Crate Inlets7 5-KM &ur3 Inlets7 no clogging +actor8 unless it has previously

3een a pro3lemM Reha3ilitation (ro1ects7 no clogging +actor8 unless it haspreviously 3een a pro3lem

I+ clogging is considered minimum is 5-KInlet 2ypes M &ur3 Inlet 2ype >* or >L with 2ype A or B cur3s =&altrans

M Crate Inlet 2ype C" or C# =&altrans


30/149


Page 7 of 0

Ta1le 0

'tor3 Drains


*torm n!grade7 "-!year *umps7 5-!year No pressure +low

Minimum siGe M 2runk Line7 "/ inches =&altransM 2runk Laterals7 "5 inches ="/ inches i+ wholly or partly under

the road3ed =&altransM Inlet Laterals7 "5 inches ="/ inches i+ wholly or partly under the

road3ed =&altransMinimum *lope $ +ps to insure sel+ cleansing

-5K as a minimum +or constructa3ilityHydraulic Crade Line =HCL M Needs to 3e calculated over the +ull length o+ storm drains with

+our or more inlets connected in a seriesM I+ the design +lood creates pressure +low8 the HCL must remain

3elow ground elevationM verside Drains M Location 3ased on roadway drainage criteriaM *ideslopes 47" or steeper M Minimum pipe diameter7 /!inches

7.# DITCES;OPEN CANNELS

Road'ide ditche' ill 8e analDed u'in Bentle?' "loMa'ter. !a8le 'u//ariDe' the ditch

re@uire/ent' *er "ederal 6and' #iha?' M unle'' otheri'e noted.

Ta1le :

Ditches


*torm


31/149


Page 2 of 0

7.3 END TREAT$ENTS

here *o''i8le7 all *ro*o'ed outlet' ill 8e de'ined to include 'o/e deree o+ 'cour *rotection. !he *ro*o'ed treat/ent' include either +lared end 'ection' or headall' +or the entrance' o+ culert' and *i*e

rundon' +or the outlet'. !a8le 4 include' criteria +or end treat/ent' and outlet *rotection. !*ical outlet *rotection ill u'e C"6# etail C25550. >+ additional *rotection i' re@uired the de'in /ethod' in#draulic nineerin Circular (#C) 11 and 14 ill 8e a**lied.

here *ractical7 outlet *rotection i' reco//ended +or the e=i'tin culert' that are e=hi8itin ero'ion.

Outlet *rotection ill 8e *roided hen +ea'i8le +or each ne cro'' culert and ill 8e 'iDed u'in thede'in 'tor/ eent +or the *ro*o'ed culert. Culert outlet *rotection ill con'i't o+ *aed rundon' or

*laced ri*ra* a*ron' *er the "#A 'tandard'.

7.7 BRIDGES

!he Rodeo 6aoon Bride ill receie reha8ilitation ork in the +or/ o+ ri*ra* re*air o+ area' 'hoinero'ion and e/8ank/ent re*lace/ent at the northe't inall. #C 11 and 23 ill 8e u'ed to 'iDe and

*lace ri*ra* at thi' location. *eci+ic de'in criteria deelo*ed throuh coordination ith N and

eniron/ental *er'onnel durin thi' *ro:ect that i/*act' the Rodeo 6aoon Bride ill 8e docu/ented ina 'e*arate Criteria Me/o.

7.2 CONSTRUCTION SITE BEST $ANAGE$ENT PRACTICES

ro'ion control /ea'ure' ill 8e u'ed to *rotect the e=i'tin ''te/ and out+all' +ro/ 'edi/ent tran'*ortdurin con'truction. An ero'ion control *lan 'hould 8e *re*ared durin *ro:ect i/*le/entation *ha'e' 8a'ed on "#A Be't Manae/ent ractice' +or ro'ion and edi/ent Control a' ell a' Caltran' Storm"ater :uality Hand%oos+ Project Planning and Design uide. !he +olloin ero'ion control *ractice'

'hould 8e u'ed7 8ut not 8e li/ited to,

M >nlet *rotection

M ilt +ence

M ro'ion control lo'

M Hehicle trackin control

er/anent (*o'tcon'truction) ero'ion control /ea'ure' ill include reeetation7 ri*ra* a*ron'7 and *i*erundon'.

2.6 ENVIRON$ENTAL !DRAULICS2.1 STREA$ RESTORATION AND REABILITATION

!he 'elected de'in ill 8e rea'ona8le in ter/' o+ 'ati'+in 'ocial7 eniron/ental7 and econo/iccon'traint'. >n the *roce'' o+ re'toration and reha8ilitation o+ 'trea/'7 the oal i' not a 'tatic7 i//oa8le

channel. Rather7 to re'tore the 'trea/ to rea'ona8le 'ta8le7 naturali'tic ''te/ that e=hi8it' a 'tate o+

dna/ic e@uili8riu/.


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33/149


34/149

dDrawingsBasinMap05dgn)#/#-"" 47""7$, (M


35/149

Nob(e *el P(oe+to > &areetera BunkerT(aba/o N o . > "---",$,""e+a -)"$""Po( > 2 9 ERe8%sa*o Po( > A F

K land use & =Htros O acres(onderado & O

DescripciSn general de la &uenca7 s%n e,)lota(

Tiempo de concentracion: tiempo de via1e concentrado y canal poco pro+undo calculado con la siguiente ecuaciSn2iempo =inicial calculado mediante la siguiente ecuaciSn *&* 2R!55

-/ -/

tc O -4# n L tt O L

(-5

*-4

)-'

donde 7 donde 7

n O coe+iciente de rugocidad7 tt O tiemp o de via1e =min LO

longitud del +lu1o super+icial en pies =5-- pies mT;imo L O longitud de +lu1o=+t

( O #!aUos8 #4!horas intenciadad de precipitacion

* O pendiente media de la cuenca8 en porcenta1e ' O velocidad =+ps

Te((est(e Con+ent(a+%on s')e(f%+%al;+anal

n O maleGa ligera *eccion 1

Longitud O +t Length O 20.# +t


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37/149

K land use & =H &areetera BunkerT(aba/o N o . > "---",$,""e+a -)"$""Po( > 2 9 ERe8%sa*o Po( > A F

CFl+'los $to*o Ra+%onalCaracteristicas de la Cuenca

DescripciSn de la cuenca = ID O A#A(ea total *e la +'en+a A H ?.7 acres =ver mapa de la cuenca

Area pavimentada O acres Prea sin pavimentar =mediana O acres

Area Residencial =Q 5 # acre lots O acres Area Residencial =Q # acre lots O acres

*u3ur3ano O(arJues O acres

>tros O acrespoderado & O

DescripciSn general de la &uenca7 7 s%n e,)lota(

Tiempo de concentracion tiempo de via1e concentrado y canal poco pro+undo calculado con la siguiente ecuaciSn72iempo =inicial calculado mediante la siguiente ecuaciSn *&* 2R!55 7

-/ -/

tc O -4# n L tt O L

(-5

*-4

)-'

donde 7 donde 7




* O pendiente media de la cuenca8 en porcenta1e

Te((est(e Con+ent(a+%on s')e(f%+%al;+anal

n O maleGa ligera *ecccion "Longitud O +t Longitud O )#/,5/# +t


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K land use & =H 2 9 ERe8%sa*o Po( > A F


DescripciSn de la cuenca = ID O B1A(ea total *e la +'en+aA H 1.1? acres =ver mapa de cuenca

Area (avimentada O acres Area sin pavimentar =mediana O acres


su3ur3ano O(arJues O acres

>tros O acresponderado& O

descricion general de la cuenca 7 s%n e,)lota(

Time of Concentration: tiempo de via1e concentrado y canal poco pro+undo calculado con la siguiente ecuaciSn72iempo =inicial calculado mediante la siguiente ecuaciSn *&* 2R!55 7

-/ -/

tc O -4# n L tt O L

(-5

*-4

)-'

donde 7 donde 7





Te((est(e +on+ent(a+%on s')e(f%+%al;+anal

n O maleGa ligera *eccion 1

Longitud O +t Longitud O #11 +t


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CFl+'los $to*oCaracteristicas de la Cuenca

DescripciSn de la cuenca =ID O C1A(ea total *e la +'en+a A H .3 acres =ver mapa de la cuenca

Area (avimentada O acres Area sin paviemntar =mediana O acres



>tros O acresponderado & O

descripcion general de la cuenca 7 s%n e,)lota(

Tiempo de concetracion tiempo de via1e concentrado y canal poco pro+undo calculado con la siguienteecuaciSn7 2iempo =inicial calculado mediante la siguiente ecuaciSn *&* 2R!55 7

-/ -/

tc O -4# n L tt O L

(-5

*-4

)-'

donde 7

donde 7n O coe+iciente de rugocidad7 tt O tiempo de via1e =min

LO longitud del +lu1o super+icial en pies =5-- pies mT;imo L O longitud de +lu1o=+t



Po( t%e((a +on+ent(a+%on s')e(f%+%al;+anal

n O maleGa ligera *eccion 1 0 # 3Longitud O +t Longitud O +t


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DescripciSn de la cuanca = ID O D0A(ea total *e la +'en+a A H #.07 acres =ver mapa de la cuenca

Area pavimentada O acres Area sin pavimentar=mediana O acres





Tiempo de concentracion:

tiempo de via1e concentrado y canal poco pro+undo calculado con la siguiente ecuaciSn72iempo =inicial calculado mediante la siguiente ecuaciSn *&* 2R!55 7

-/ -/tc O -4# n L tt O L

(-5

*-4

)-'

donde 7 donde 7

n O coe+iciente de rugosidad7 tt O 2iempo de via1e =min

LO longitud del +lu1o super+icial en pies =5-- pies mT;imo L O longitud de +lu1o =+t



te((est(e +on+ent(a+%on s')e(f%+%al;+anal

n O maleGa ligera *eccion 1Longitud O +t Longitud O 1#06.#1 +t


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DescripciSn de la cuenca = ID O "1A(ea total *e la +'en+a A H 1.02 acres =ver mapa de cuenca

Area (avimentada O acres Area npaved =mediana O acres





Tiempo de concentracion: tiempo de via1e concentrado y canal poco pro+undo calculado con la siguiente ecuaciSn72iempo =inicial calculado mediante la siguiente ecuaciSn *&* 2R!55 7

-/ -/

tc O -4# n L tt O L

(-5

*-4

)-'

donde 7 donde 7


LO longitud del +lu1o super+icial en pies =5-- pies mT;imo L O longitud de +lu1o =+t( O #!aUos8 #4!horas intenciadad de precipitacion



n O maleGa ligera *eccion 1Longitud O +t Longitud O 03 +t


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DescripciSn de la cuenca = ID O "0A(ea total *e la +'en+a A H 6.7# acres =ver mapa de la cuenca

Area (avimentada O acres Area sin pavimentar =mediana O acres





Time of Concentration: tiempo de via1e concentrado y canal poco pro+undo calculado con la siguiente ecuaciSn72iempo =inicial calculado mediante la siguiente ecuaciSn *&* 2R!55 7

-/ -/

tc O -4# n L tt O L

(-5

*-4

)-'

donde 7 donde 7





n O maleGa ligera *ection 1Longitud O +t Longitud O 17.#? +t


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DescripciSn d ela cuenca = ID O "#A(ea total *e la +'en+a A H 6. acres =ver mapa de cuenca

Area (avimentada O acres Area npaved =median O acres





Tiempo de concentracion: tiempo de via1e concentrado y canal poco pro+undo calculado con la siguiente ecuaciSn72iempo =inicial calculado mediante la siguiente ecuaciSn *&* 2R!55 7

-/ -/

tc O -4# n L tt O L

(-5

*-4

)-'

donde 7 donde 7





n O malesa ligera *eccion 1Longitud O +t Longitud O #6.117 +t


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Rat%onal $eto* Cal+'lat%onsBasin Charcteristics

Basin Description =ID O G1Total Bas%n A(ea A H 01. acres =see 3asin map

Area (aved O acres Area npaved =median O acres

Area Residential =Q 5 # acre lots O acres Area Residential =Q # acre lots O acres

*u3ur3an O(arks O acres>ther O acres

%eighted & O

Ceneral Basin Description =undeveloped or ur3aniGed 7 'n*e8elo)e*

Time of Concentration:*hallow concentrated and channel travel time calculated using

2ime =initial calculated using the +ollowing *&* 2R!55 eJuation 7the +ollowing eJuation 7

-/ -/tc O -4# n L tt O L

(-5

*-4

)-'

where 7 where 7

n O roughness coe++icient7 tt O 2ravel 2ime =min

LO length o+ overland +low in +eet =5--W ma;imum L O +low length =+t

( O #!year8 #4!hour rain+all depth* O average 3asin slope in percent ' O velocity =+ps

O8e(lan* Sallo9 Con+ent(ate*;Cannel

n O light under3rush *ection 1Length O +t Length O 11??.723 +t


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Basin Description =ID O I1Total Bas%n A(ea A H 1.21 acres =see 3asin map




%eighted & O




-/ -/tc O -4# n L tt O L

(-5

*-4

)-'

where 7 where 7





n O light under3rush *ection 1Length O +t Length O 3 ft


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Basin Description =ID O J1Total Bas%n A(ea A H ?.2? acres =see 3asin map




%eighted & O




-/ -/tc O -4# n L tt O L

(-5

*-4

)-'

where 7 where 7





n O light under3rush *ection 1 0Length O +t Length O +t


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P( o /e+t Na e > B unker RoadJ o b N o . > "---",$,"Da t e -0##"-B > A FC e+4e* B > 2 9 E

K land use & =H


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53/149

K land use & =H


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K land use & =H B unker RoadJ o b N o . > "---",$,"Da t e -0##"-B > A FC e+4e* B > 2 9 E


Basin Description =ID O N1Total Bas%n A(ea A H 3.# acres =see 3asin map




%eighted & O




-/ -/tc O -4# n L tt O L

(-5

*-4

)-'

where 7 where 7





n O light under3rush *ection 1Length O +t Length O ?0.310 +t


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P( o /e+t Na e > B unker RoadJ o b N o . > "---",$,"Da t e -0"$"-B > &DC e+4e* B > M H

K land use & =H


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P( o /e+t Na e > B unker RoadJ o b N o . > "---",$,"Da t e )#/#-""B > &DC e+4e* B > M H

K land use & =H


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National *tream+low *tatistics (rogram'ersion 4-Based on 2echniJues and Methods Book 4!A)

Bunkernsst;t

BnDA9de+initions


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Table 1 - S'a( of C'l8e(t "lo9s at C(oss%n&> #@0.0

Headwater vertopping


60/149

Rat%n& C'(8e Plot fo( C(oss%n&> #@0.0


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62/149


63/149

:ate( S'(fa+e P(of%le Plot fo( C'l8e(t> A1

S%te Data - A1

*ite Data >ption7 &ulvert Invert Data

Inlet *tation7 --- +t Inlet


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Table # - Do9nst(ea Cannel Rat%n& C'(8e C(oss%n&> #@0.0

Flow =c+s %ater *ur+ace ption7


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Table 3 - S'a( of C'l8e(t "lo9s at C(oss%n&> 3#@6?.03

Headwater


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67/149

Table 7 - C'l8e(t S'a( Table> B1

2otalDischarge

=c+s

&ulvertDischarge

=c+s

Headwater utlet&ontrol

Depth =+t

Flow2ype

NormalDepth =+t

&riticalDepth =+t

>utletDepth =+t

2ailwater Depth =+t

>utlet'elocity

=+ts

2ailwater 'elocity

=+ts

-,5 -,5 ",5# -$0, -- "!*#n -#)) -#/# -#,# ---- #/$- ----

-/# -/# ",54 -4") -- "!*#n -#,, -#05 -#/5 ---- #/,) ----

-// -// ",55 -4$$ -- "!*#n -#/0 -$-/ -#0/ ---- #0", ----

-05 -05 ",5, -45- -- "!*#n -$-- -$## -$"# ---- #05$ ----

"-- "-- ",5/ -4)$ -- "!*#n -$-/ -$$# -$## ---- #0,) ----

"-0 "-0 ",)- -4/4 -- "!*#n -$#$ -$40 -$$0 ---- $-"$ ----

""5 ""5 ",)# -5-- -- "!*#n -$$4 -$)# -$5# ---- $-$/ ----

"## "## ",)4 -5") -- "!*#n -$4) -$,5 -$54 ---- $"/) ----

"#0 "#0 ",)5 -5$# -- "!*#n -$5, -$/0 -$50 ---- $$-, ----

"$5 "$5 ",), -54, -- "!*#n -$)0 -4-" -$,- ---- $$$0 ----

"4# "4# ",)/ -5)# -- "!*#n -$/- -4"- -$/4 ---- $$4/ ----

theoretical depth is impractical Depth reported is corrected

Inlet utlet


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C'l8e(t Pe(fo(an+e C'(8e Plot> B1


69/149

:ate( S'(fa+e P(of%le Plot fo( C'l8e(t> B1

S%te Data - B1



utlet

*tation7 5"-- +t >utlet


70/149


71/149


72/149

Rat%n& C'(8e Plot fo( C(oss%n&> 37@#7.3


73/149


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C'l8e(t Pe(fo(an+e C'(8e Plot> C1


75/149


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Table - Do9nst(ea Cannel Rat%n& C'(8e C(oss%n&> 37@#7.3

Flow =c+s %ater *ur+ace 37@#7.3

Roadway (ro+ile *hape7 &onstant Roadway


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78/149

Rat%n& C'(8e Plot fo( C(oss%n&> [email protected]


79/149

Table 11 - C'l8e(t S'a( Table> D1

2otalDischarge

=c+s

&ulvertDischarge

=c+s


Depth =+t

Flow2ype

NormalDepth =+t

&riticalDepth =+t

>utletDepth =+t

2ailwater Depth =+t

>utlet'elocity

=+ts

2ailwater 'elocity

=+ts

#$-) #$-) ")45 ##/5 -- "!*#n "$), "54$ "$,5 ---- ,#05 ----

#5-/ #5-/ ")5, #4-) -- "!*#n "4$) ")-0 "44# ---- ,4)- ----

#,-0 #,-0 "))/ #5#4 -- "!*#n "5-5 "),) "5-/ ---- ,)", ----

#0"" #0"" ")/- #)4" -- "!*#n "5,- ",4$ "5,) ---- ,,4# ----

$-)" $-)" ")/0 #,#/ -- "!*#n ")"0 ",0# ")#5 ---- ,/$4 ----

$$"4 $$"4 ",-4 #/,) -- "!*#n ",-" "/)4 ",-, ---- ,0/) ----

$5") $5") ",") #00) -- "!*#n ",)) "0#" ",,- ---- /"-) ----

$,"/ $,"/ ",#/ $""/ -- 5!*#n "/$$ "0,, "/$$ ---- /#"4 ----

$0#- $0#- ",4- $#4$ -- 5!*#n "0-" #-$$ "0-# ---- /$-$ ----

4"#" 4"#" ",5$ $$,# -- 5!*#n "0)0 #-0- "0)0 ---- /$0$ ----

4$#$ 4$#$ ",), $5-) -- 5!*#n #-$, #"$/ #-$, ---- /4)0 ----


Inlet utlet


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C'l8e(t Pe(fo(an+e C'(8e Plot> D1


81/149

:ate( S'(fa+e P(of%le Plot fo( C'l8e(t> D1

S%te Data - D1



utlet

*tation7 )5-- +t >utlet


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Table 10 - Do9nst(ea Cannel Rat%n& C'(8e C(oss%n&> [email protected]

Flow =c+s %ater *ur+ace [email protected]

Roadway (ro+ile *hape7 &onstant Roadway


83/149


84/149

Rat%n& C'(8e Plot fo( C(oss%n&> @1.1


85/149

Table 13 - C'l8e(t S'a( Table> I1> D(%8e9a-

2otalDischarge

=c+s

&ulvertDischarge

=c+s


Depth =+t

Flow2ype

NormalDepth =+t

&riticalDepth =+t

>utletDepth =+t

2ailwater Depth =+t

>utlet'elocity

=+ts

2ailwater 'elocity

=+ts

#40 #40 ,)5) -,5- -- "!*#n -5-$ -54# -5"" -#)4 $/0) "/,)

#)5 #)5 ,)50 -,,) -- "!*#n -5#- -5)# -5## -#,$ 4-#0 "0#$

#/" #/" ,))" -/-" -- "!*#n -5$/ -5/# -54" -#/4 4-,# "05/

#0/ #0/ ,))4 -/#, -- "!*#n -555 -)-# -5)" -#0$ 4"-) "00/

$"4 $"4 ,))) -/5" -- "!*#n -5,# -)") -5,5 -$-# 4"/$ #-$)

$$- $$- ,))0 -/,5 ---" "!*#n -5/0 -)$" -50- -$"" 4#54 #-,-

$4) $4) ,)," -/00 ---0 "!*#n -)-5 -)4) -)-) -$"0 4$"$ #""-

$)# $)# ,),$ -0", --"0 "!*#n -)"/ -))" -)#- -$#0 4$/4 #"$0

$,0 $,0 ,),5 -0$/ --#, "!*#n -)$" -),5 -)$4 -$$, 444$ #",4

$05 $05 ,),, -050 --$) "!*#n -)45 -)0- -)40 -$4) 440/ #"00

4"" 4"" ,),0 -0/- --44 "!*#n -)5/ -,-5 -))4 -$54 4404 ##$-


Inlet


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C'l8e(t Pe(fo(an+e C'(8e Plot> I1> D(%8e9a-


87/149

:ate( S'(fa+e P(of%le Plot fo( C'l8e(t> I1> D(%8e9a-

S%te Data - I1> D(%8e9a-



D(%8e9a-

Barrel *hape7 &ircular

Barrel Diameter7 #-- +t

Barrel Material7 *mooth HD(<


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Table 17 - Do9nst(ea Cannel Rat%n& C'(8e C(oss%n&> @1.1

Flow =c+s%ater *ur+ace


89/149

Table 12 - S'a( of C'l8e(t "lo9s at C(oss%n&> [email protected]?

Headwater


90/149

Rat%n& C'(8e Plot fo( C(oss%n&> [email protected]?


91/149

Table 1? - C'l8e(t S'a( Table> 1> D(%8e9a-

2otalDischarge

=c+s

&ulvertDischarge

=c+s


Depth =+t

Flow2ype

NormalDepth =+t

&riticalDepth =+t

>utletDepth =+t

2ailwater Depth =+t

>utlet'elocity

=+ts

2ailwater 'elocity

=+ts

"5$- "5$- ,4)" ##0" #$5# #!M#c ")-- "4-0 "4"- ---- )4)4 ----

")), ")), ,4,5 #4)$ #4// #!M#c ",0/ "4)) "4,# ---- ),#) ----

"/-4 "/-4 ,40" #)4/ #)4$ #!M#c #--- "5#4 "5$- ---- ,--0 ----

"04- "/,/ ,5-" #,55 #,#$ #!M#c #--- "555 "5)- ---- ,"55 ----

#-,, "0#" ,5-/ #/"0 #,)0 #!M#c #--- "5,4 "5,, ---- ,#$0 ----

##"4 "05, ,5"$ #/,4 #/-/ #!M#c #--- "5/0 "50" ---- ,$"- ----

#$5" "00- ,5"/ #0#$ #/4" #!M#c #--- ")-# ")-$ ---- ,$,$ ----

#4// #-"0 ,5#$ #0,- #/," #!M#c #--- ")"- ")"$ ---- ,4$" ----

#)#4 #-4) ,5#, $-"$ #0#" #!M#c #--- ")"/ ")#$ ---- ,4/4 ----

#,)" #-,# ,5$" $-54 #05$ #!M#c #--- ")#) ")$# ---- ,5$4 ----

#/0/ #-05 ,5$5 $-0$ #0/$ #!M#c #--- ")$$ ")4- ---- ,5/" ----

Inlet utlet


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C'l8e(t Pe(fo(an+e C'(8e Plot> 1> D(%8e9a-


93/149

:ate( S'(fa+e P(of%le Plot fo( C'l8e(t> 1> D(%8e9a-

S%te Data - 1> D(%8e9a-



utlet

*tation7 $#-- +t >utlet

D(%8e9a-

Barrel *hape7 &ircular

Barrel Diameter7 #-- +t

Barrel Material7 *mooth HD(<


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Table 1 - Do9nst(ea Cannel Rat%n& C'(8e C(oss%n&> [email protected]?

Flow =c+s %ater *ur+ace ption7


95/149

P(o/e+t Data

*(a'l%+ Anals%s Re)o(t

(ro1ect 2itle7 05K Bunker RoadDesigner7

(ro1ect Date7 2uesday8 Fe3ruary "58 #-""(ro1ect nits7 * &ustomary nitsNotes7

$e*%an;D%t+ D(o)-Inlet Anals%s> A#> D%t+ InletNotes7

sing the +ollowing channel7 A$7 Historic Ditch

Cannel Anals%s> A#> %sto(%+ D%t+

Notes7

In)'t Pa(aete(s

&hannel 2ype7 2riangular*ide *lope " =Y"7 )---- =+t+t*ide *lope # =Y#7 #---- =+t+tLongitudinal *lope7 --5#- =+t+tManningWs n7 --")-

Flow7 )-,-- =c+sRes'lt Pa(aete(sDepth7 -44)0 =+t

Area o+ Flow7 -,0/0 =+tX#%etted (erimeter7 $,",, =+tHydraulic Radius7 -#"40 =+t

Average 'elocity7 ,50/" =+ts2op %idth7 $5,5# =+tFroude Num3er7 #/$#)&ritical Depth7 -$,0) =+t&ritical 'elocity7 #4,#" =+ts&ritical *lope7 -"#4# =+t+t&ritical 2op %idth7 $-$)) =+t

&alculated Ma; *hear *tress7 "45-" =l3+tX#&alculated Avg *hear *tress7 -)0,$ =l3+tX#

Inlet Data>

&omputing the reJuired channel 3lock =3erm height(ercent &logging7 -----Crate 2ype7 $- degree tilt!3ar Crate %idth7 "0)-- =+tCrate Length7 $$$-- =+t

Co)'te* Data>

(erimeter7 "-5/-- =+t


96/149

Cannel Anals%s> A#> %sto(%+ D%t+

Notes7

In)'t Pa(aete(s

&hannel 2ype7 2riangular*ide *lope " =Y"7 )---- =+t+t*ide *lope # =Y#7 #---- =+t+tLongitudinal *lope7 --5#- =+t+tManningWs n7 --")-Flow7 )-,-- =c+s

Res'lt Pa(aete(s

Depth7 -44)0 =+t Area o+ Flow7 -,0/0 =+tX#%etted (erimeter7 $,",, =+tHydraulic Radius7 -#"40 =+t

Average 'elocity7 ,50/" =+ts2op %idth7 $5,5# =+tFroude Num3er7 #/$#)&ritical Depth7 -$,0) =+t&ritical 'elocity7 #4,#" =+ts

&ritical *lope7 -"#4# =+t+t&ritical 2op %idth7 $-$)) =+t&alculated Ma; *hear *tress7 "45-" =l3+tX#&alculated Avg *hear *tress7 -)0,$ =l3+tX#


97/149

$e*%an;D%t+ D(o)-Inlet Anals%s> A0> D%t+ Inlet

Notes7

sing the +ollowing channel7 A#7 Historic (aved Ditch

Cannel Anals%s> A0> %sto(%+ Pa8e* D%t+

Notes7

In)'t Pa(aete(s&hannel 2ype7 2riangular*ide *lope " =Y"7 )---- =+t+t*ide *lope # =Y#7 #---- =+t+tLongitudinal *lope7 --))- =+t+tManningWs n7 --")-Flow7 -4--- =c+s

Res'lt Pa(aete(s

Depth7 -"54" =+t Area o+ Flow7 --05- =+tX#%etted (erimeter7 "#/#" =+tHydraulic Radius7 --,4" =+t

Average 'elocity7 4#-0, =+ts

2op %idth7 "#$$- =+tFroude Num3er7 #),#4&ritical Depth7 ----4 =+t&ritical 'elocity7 --/#5 =+ts&ritical *lope7 $-##4#554/505")4) =+t+t&ritical 2op %idth7 ---$4 =+t&alculated Ma; *hear *tress7 -)$4, =l3+tX#&alculated Avg *hear *tress7 -$-5# =l3+tX#

Inlet Data>

Not computing the channel 3lock =3erm heightInlet Location7 Inlet on gradeCrate 2ype7 $- degree tilt!3ar

Crate %idth7 "0)-- =+tCrate Length7 $$$-- =+t

Co)'te* Data>

Intercepted +low7 -4--- =c+ sBypass +low7 ----- =c+s


98/149


Notes7

In)'t Pa(aete(s

&hannel 2ype7 2riangular*ide *lope " =Y"7 )---- =+t+t*ide *lope # =Y#7 #---- =+t+tLongitudinal *lope7 --))- =+t+tManningWs n7 --")-Flow7 -4--- =c+s

Res'lt Pa(aete(s

Depth7 -"54" =+t Area o+ Flow7 --05- =+tX#%etted (erimeter7 "#/#" =+tHydraulic Radius7 --,4" =+t

Average 'elocity7 4#-0, =+ts2op %idth7 "#$$- =+tFroude Num3er7 #),#4&ritical Depth7 ----4 =+t&ritical 'elocity7 --/#5 =+ts

&ritical *lope7 $-##4#554/505")4) =+t+t&ritical 2op %idth7 ---$4 =+t&alculated Ma; *hear *tress7 -)$4, =l3+tX#&alculated Avg *hear *tress7 -$-5# =l3+tX#


99/149

$e*%an;D%t+ D(o)-Inlet Anals%s> A1> D%t+ Inlet

Notes7

sing the +ollowing channel7 A"7 Historic (aved Ditch


Notes7

In)'t Pa(aete(s&hannel 2ype7 2riangular*ide *lope " =Y"7 )---- =+t+t*ide *lope # =Y#7 #---- =+t+tLongitudinal *lope7 --))- =+t+tManningWs n7 --"5-Flow7 ")5-- =c+s

Res'lt Pa(aete(s

Depth7 -#550 =+t Area o+ Flow7 -#)#- =+tX#%etted (erimeter7 #"#0# =+tHydraulic Radius7 -"#$" =+t

Average 'elocity7 )#0)0 =+ts

2op %idth7 #-4,) =+tFroude Num3er7 $"-#-&ritical Depth7 --"4) =+t &ritical 'elocity7 -4/5# =+ts &ritical *lope7 #/"5-0,--, =+t+t &ritical 2op %idth7 -"",- =+t&alculated Ma; *hear *tress7 "-54" =l3+tX#&alculated Avg *hear *tress7 -5-)/ =l3+tX#

Inlet Data>



Co)'te* Data>

Intercepted +low7 ")5-- =c+ sBypass +low7 ----- =c+s


100/149


Notes7

In)'t Pa(aete(s

&hannel 2ype7 2riangular*ide *lope " =Y"7 )---- =+t+t*ide *lope # =Y#7 #---- =+t+tLongitudinal *lope7 --))- =+t+tManningWs n7 --"5-Flow7 ")5-- =c+s

Res'lt Pa(aete(s

Depth7 -#550 =+t Area o+ Flow7 -#)#- =+tX#%etted (erimeter7 #"#0# =+tHydraulic Radius7 -"#$" =+t

Average 'elocity7 )#0)0 =+ts2op %idth7 #-4,) =+tFroude Num3er7 $"-#-&ritical Depth7 --"4) =+t &ritical 'elocity7 -4/5# =+ts &ritical

*lope7 #/"5-0,--, =+t+t &ritical 2op %idth7 -"",- =+t&alculated Ma; *hear *tress7 "-54" =l3+tX#&alculated Avg *hear *tress7 -5-)/ =l3+tX#


101/149

C'(b an* G'tte( Anals%s> A1> C'(be* D%t+

Notes7

G'tte( In)'t Pa(aete(s

Longitudinal *lope o+ Road7 --))- =+t+t&ross!*lope o+ (avement7 --#-- =+t+tDepressed Cutter Ceometry&ross!*lope o+ Cutter7 -"--- =+t+tManningWs n7 --")-Cutter %idth7 $---- =+t%idth o+ *pread7 ##$#0 =+t

G'tte( Res'lt Pa(aete(s Design Flow7 ")5-- =c+s Cutter Depression7 #//-- =in Areao+ Flow7 -4-00 =+tX#


102/149

C'(b an* G'tte( Anals%s> B1> C'(be* D%t+

Notes7

G'tte( In)'t Pa(aete(s

Longitudinal *lope o+ Road7 --"/- =+t+t&ross!*lope o+ (avement7 --#-- =+t+tDepressed Cutter Ceometry&ross!*lope o+ Cutter7 -"--- =+t+tManningWs n7 --")-Cutter %idth7 $---- =+t%idth o+ *pread7 #""0) =+t

G'tte( Res'lt Pa(aete(s Design Flow7 -,5-- =c+s Cutter Depression7 #//-- =in Areao+ Flow7 -4-40 =+tX#


103/149

$e*%an;D%t+ D(o)-Inlet Anals%s> C1> D%t+ Inlet

Notes7

sing the +ollowing channel7 &"7 'egetated &hannel

Cannel Anals%s> C1> Ve&etate* Cannel

Notes7

In)'t Pa(aete(s&hannel 2ype7 2riangular*ide *lope " =Y"7 4---- =+t+t*ide *lope # =Y#7 4---- =+t+tLongitudinal *lope7 --")- =+t+tManningWs n7 --$--Flow7 4-$-- =c+s

Res'lt Pa(aete(s

Depth7 -)-$/ =+t Area o+ Flow7 "45/4 =+tX#%etted (erimeter7 40,0# =+tHydraulic Radius7 -#0#0 =+t

Average 'elocity7 #,)$$ =+ts

2op %idth7 4/$-5 =+tFroude Num3er7 -//)$&ritical Depth7 -"$)$ =+t&ritical 'elocity7 "4/"5 =+ts&ritical *lope7 44,//0 =+t+t&ritical 2op %idth7 "-0-) =+t&alculated Ma; *hear *tress7 -)-#0 =l3+tX#&alculated Avg *hear *tress7 -#0#4 =l3+tX#

Inlet Data>

&omputing the reJuired channel 3lock =3erm height(ercent &logging7 -----Crate 2ype7 $- degree tilt!3ar


Co)'te* Data>

(erimeter7 "-5/-- =+t


104/149

Cannel Anals%s> C1> Ve&etate* Cannel

Notes7

In)'t Pa(aete(s

&hannel 2ype7 2riangular*ide *lope " =Y"7 4---- =+t+t*ide *lope # =Y#7 4---- =+t+tLongitudinal *lope7 --")- =+t+tManningWs n7 --$--Flow7 4-$-- =c+s

Res'lt Pa(aete(s

Depth7 -)-$/ =+t Area o+ Flow7 "45/4 =+tX#%etted (erimeter7 40,0# =+tHydraulic Radius7 -#0#0 =+t

Average 'elocity7 #,)$$ =+ts2op %idth7 4/$-5 =+tFroude Num3er7 -//)$&ritical Depth7 -"$)$ =+t&ritical 'elocity7 "4/"5 =+ts

&ritical *lope7 44,//0 =+t+t&ritical 2op %idth7 "-0-) =+t&alculated Ma; *hear *tress7 -)-#0 =l3+tX#&alculated Avg *hear *tress7 -#0#4 =l3+tX#


105/149

$e*%an;D%t+ D(o)-Inlet Anals%s> D0> D%t+ Inlet

Notes7

sing the +ollowing channel7 D#7 'egetated Ditch

Cannel Anals%s> D0> Ve&etate* D%t+

Notes7

In)'t Pa(aete(s&hannel 2ype7 2riangular*ide *lope " =Y"7 4---- =+t+t*ide *lope # =Y#7 4---- =+t+tLongitudinal *lope7 --")- =+t+tManningWs n7 --$--Flow7 "",-- =c+s

Res'lt Pa(aete(s

Depth7 -$,0, =+t Area o+ Flow7 -5,)/ =+tX#%etted (erimeter7 $"$"4 =+tHydraulic Radius7 -"/4# =+t

Average 'elocity7 #-#/4 =+ts

2op %idth7 $-$,0 =+tFroude Num3er7 -/#-$&ritical Depth7 ---)# =+t&ritical 'elocity7 -$"5, =+ts&ritical *lope7 54,),#/$#/)" =+t+t&ritical 2op %idth7 --405 =+t&alculated Ma; *hear *tress7 -$,0" =l3+tX#&alculated Avg *hear *tress7 -"/$0 =l3+tX#

Inlet Data>



Co)'te* Data>

Intercepted +low7 "",-- =c+ sBypass +low7 ----- =c+s


106/149

Cannel Anals%s> D0> Ve&etate* D%t+

Notes7

In)'t Pa(aete(s

&hannel 2ype7 2riangular*ide *lope " =Y"7 4---- =+t+t*ide *lope # =Y#7 4---- =+t+tLongitudinal *lope7 --")- =+t+tManningWs n7 --$--Flow7 "",-- =c+s

Res'lt Pa(aete(s

Depth7 -$,0, =+t Area o+ Flow7 -5,)/ =+tX#%etted (erimeter7 $"$"4 =+tHydraulic Radius7 -"/4# =+t

Average 'elocity7 #-#/4 =+ts2op %idth7 $-$,0 =+tFroude Num3er7 -/#-$&ritical Depth7 ---)# =+t&ritical 'elocity7 -$"5, =+ts

&ritical *lope7 54,),#/$#/)" =+t+t&ritical 2op %idth7 --405 =+t&alculated Ma; *hear *tress7 -$,0" =l3+tX#&alculated Avg *hear *tress7 -"/$0 =l3+tX#


107/149

$e*%an;D%t+ D(o)-Inlet Anals%s> E1> D%t+ Inlet

Notes7

sing the +ollowing channel7


108/149

Cannel Anals%s> E1> Ve&etate* Cannel

Notes7

In)'t Pa(aete(s

&hannel 2ype7 2riangular*ide *lope " =Y"7 4---- =+t+t*ide *lope # =Y#7 #---- =+t+tLongitudinal *lope7 ---5- =+t+tManningWs n7 --$--Flow7 ")5-- =c+s

Res'lt Pa(aete(s

Depth7 -)-#) =+t Area o+ Flow7 "-/05 =+tX#%etted (erimeter7 $/$#$ =+tHydraulic Radius7 -#/4$ =+t

Average 'elocity7 "5"44 =+ts2op %idth7 $)"50 =+tFroude Num3er7 -4/)#&ritical Depth7 --$-- =+t&ritical 'elocity7 -)05# =+ts

&ritical *lope7 44$#",/-4 =+t+t&ritical 2op %idth7 -"/-" =+t&alculated Ma; *hear *tress7 -"//- =l3+tX#&alculated Avg *hear *tress7 --//, =l3+tX#


109/149

$e*%an;D%t+ D(o)-Inlet Anals%s> "1> D%t+ Inlet

Notes7

sing the +ollowing channel7 F"7 'egetated &hannel

Cannel Anals%s> "1> Ve&etate* Cannel

Notes7

In)'t Pa(aete(s&hannel 2ype7 2riangular*ide *lope " =Y"7 4---- =+t+t*ide *lope # =Y#7 #---- =+t+t

final hydraulics report central federal lands highway division

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