20090900 Ver 1_More Info Received_20090904

»i M U LK EY
ENGINEERS & CONSULTANTS
PO Box 331 27
RALEIGH, NC 27636
PHONE: [phone]
FAx: [phone]
09-0900
LETTER OF TRANSMITTAL
To: Lia Gilleski
DWQ 401 Express Permit Unit
2321 Crabtree Blvd., Suite 250
Raleigh, NC 27604
[phone]
From: Cindy Carr
[phone]
[e-mail]
Re: Burning Tree Drive Stormwater Drainage
Improvements, Chapel Hill, Orange County
I am sending you the following item(s):
Date: September 3, 2009
"HAND DELIVERED"
Job No.: 2007038.00
COPIES DATE NO. DESCRIPTION
1 Plan Sheet C-1, Drawing Revisions
These are transmitted as checked below:
? As requested ? For your use
® For approval ? For Signatures
? For review and comment ? Contract for your files
Remarks:
Lia,
Please call me at [phone] or send email to ccarrCa?mulkevinc.com if you have any questions about
the attached information.
CC: File Receipt
Joseph Gyamfi, DWQ 401 Unit Signature:
SEP - 2009
WETLANDS AND sTORWV A EAR BRANCH
Comment number 1 Aquatic Life Passage
On September 3, 2009 Jeff Reck spoke to Joseph Gyamfi about the aquatic life passage comment made
on September 2, 2009. The natural channel elevation is at 243.1 approximately 25 feet upstream of the
existing cross pipes and 242.9 approximately 60 feet downstream. The lower bed elevation at the
existing cross pipes appears to be man maintained to keep the existing pipes free of sediment and
flowing. The proposed invert of the culvert is 241.7. After the stream returns to a natural condition the
culvert will be buried approximately 1.3 feet. Directly after construction the culvert will be buried 0.2 to
0.3 feet. In conversation with Mr. Gyamfi due to the bed elevation downstream being greater than 1
foot of the proposed culvert invert aquatic life will be able to pass through the proposed culvert. The
detail on sheet C-1 has been edited to show these conditions.
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TOTAL BILL OF MATE w .o ATEIAL TES 0
° PRECAST REINFORCED CONCRETE B0 m T CULVERT C~ STA. 10+32.48 CULVERT EXCAVATION ...................LU FONDATION CONDITIONING MATERI CHAPEL HILL COUNTRY CLUB PROPOSED SINGLE 6' X 3' BOX CULVERT !CRETE BOX ASSUMED LIVE LOAD9HS2O-44 OR ALTERNATE LOADING.
8 .........LUMP SUM FOR OTHER STANDARD DATA AND NOTES SEE STANDARD
............LUMP SUM NOTES SHEET.
MATERIAL THE ENGINEER SHALL CHECK THE LENGTH OF THE
DB 3391 PG 96 ...............TONS 7 CULVERT BEFORE STAKING IT OUT TO MAKE CERTAIN - THAT IT WILL PROPERLY TAKE CARE OF THE FILL.
PRECAST BOX CULVERT REMOVAL OF EXISTING PIPES.......... :PES...........LUMP SUM EXISTING 24" HDPE PIPE TO BE REMOVED.
-CART- PC Sto. 10-F00.00 CLASS A CONCRETE
DIMENSIONS FOR WING LAYOUT AS WELL AS ADDITIONAL
N 788,672.8525 WINGS ETC 8.5 CY REINFORCING STEEL EMBEDDED IN BARREL ARE SHOWN
_ E 1,995.888.9/84 TOTAL ~N WING SHEET. 8.5 CY
STA. 10+32.71
~ BEGIN CONCRETE CARTPATH THE CONCRETE FOR THE PRECAST UNITS SHALL ATTAIN A
C~ ~ hx'', _ -CART- POC Sto:>0+19.00 MINIMUM COMPRESSIVE STRENGTH AT 28 DAYS OF 5000 P.S.L .
~ A~ < THE CONCRETE FOR THE HEADWALLS, LEVELING PADs WINGS AND SEAL)` END CURTAIN WALLS SHALL BE CLASS "A" CONCRETE AS PER
y w THE STANDARD SPECIFICATIONS.
FOR CONSTRUCTION SEOUENCE9SEE SPECIAL PROVISIONS.
--r _ WHEN ANY PRECAST UNIT IS DAMAGED DURING HANDLING, THE
ENGINEER AT HIS DISCRETION SHALL REJECT THE UNIT AS ~
BEING UNFIT FOR INSTALLATION AND THE CONTRACTOR SHALL Z
_ . _ o _ 4~ 1°~ END CONCRETE CART - REMOVE SUCH REJECTED UNIT FROM THE PROJECT. MINOR Q
° ~ - a: t DAMAGE TO THE UNIT MAY BE REPAIRED BY THE CONTRACTOR J
-CART- PT Sta. 10+56b7 WHEN PERMITTED BY THE ENGINEER. ~
. W W
N 788,666.0460 CARE SHALL BE TAKEN DURING BACKFILL AND COMPACTION Z ~
OPERATION TO MAINTAIN ALIGNMENT AND PREVENT DAMAGE TO m v ~
~ CART PATH E 1.995,945J076 THE JOINTS. UNITS WHICH BECOME MISALIGNED, SHOW ~ ~ N ~ ~ z
EXCESSIVE SETTLEMENT, OR HAVE OTHERWISE BEEN DAMAGED BY
_ EXISTING 24"HDPE THE CONTRACTORS OPERATION SHALL AT THE DISCRETION OF ~ ~r
PIPES TO BE REMOVED THE ENGINEER BE REMOVED AND REPLACED BY THE CONTRACTOR ~ ~ ~v m~Y
AT NO COST TO THE TOWN OF CHAPEL HILL. ~ W ~ z N N j
CHAPEL HILL COUNTRY CLUB z a ~~oo~ W
DB 3391 PG 96 CONCRETE CHAMFERS ON EXTERIOR LONGITUDINAL EDGES OF THE °
PRECAST UNITS MAY BE AS PER THE FABRICATORS ~ mW°'°°3
-CART- RECOMMENDATION9HOWEVER ALL WORKMANSHIP SHALL PROVIDE W ~ ~ ~o,~
Pl Sta 10+28.40 CONCRETE COVER OVER THE WELDED WIRE FABRIC AS SPECIFIED
N 788.67/.7959 ON THE PLANS AND THE CONCRETE CHAMFERS CHOSEN SHALL IN r
E 1,995,9/72973 NO WAY FUNCTIONALLY LESSEN THE DESIGN SHOWN ON THE ~r
D = 5 32' 56.8" (RTl PLANS.
D = lG 5/' 06J" FOR PRECAST REINFORCED CONCRETE BOX CULVERTgSEE
L = 56.67' SPECIAL PROVISIONS.
T = 28.90'
R = 340.00' A 3 FOOT STRIP OF FILTER FABRIC SHALL BE ATTACHED TO THE W o
FILL FACE OF EACH WING~OVERING THE ENTIRE LENGTH OF THE ~ ~
EXPANSION JOINT. ~ J
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LOCATION SKETCH
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m m
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W ~ 0 0
~ CART PA CART PATH
74'-6„ 31,_6„_ > ~
NATURAL o ~
CHANNEL NATURAL W Z
ELEV. 243.0 CHANNEL m w ® ~
„ „ ELEV. 243.0 ~ 3 ~ ~ w
EXISTING 5 6 5 6 z p ~ 0
CHANNEL BED 1.3'
1.3' W o ~W~
NATURAL CHANNEL ~ ~
0 ~
~ ~ m --e_---------

ELEV. 242.9±
ELEV. 242.3± ------ELEV. 241.9±~ ELEV. 243.1 ± INV. IN ELEV. 241.7±
ELEV. 241.6±
INV. OUT ELEV. 241.689 J Z
ELEV. 241.663 m W 663 ~ Z
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PROPOSED
INV. ELEV 241.676 CHANNEL BED NV. ELEV. _ ~ ~ N
W 41.676 J° W"
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O e. ~ZZJnw ~ ~ W ~ = U H
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PROFILE L LET ~ zz~4~, a ~w~UQ'O
SHEET N0.
OE SHEETS