HomeMy WebLinkAboutDrainage Report C,uP Oa.- H1
Project Name: ch,..L C
( J 1 t/
Review Date: V Z d Z.
COLLEGE STATION Reviewer: 1 S)
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Drai*age Reports
Loca ion
rimary drainage system identified
) Surrounding developments shown
ocal streets, drainage systems shown
Desc iption
V creage of project
an¢ cover described
Primary/secondary systems within property shown
General description
rains a Basins
A ferences to FIRMs if applicable
econdary system flow patterns and impact of development on existing system
✓Proposed pathways to Primary system shown or described s '(� /� �5 I,
Design Criteria �1 � �2 '- - i a
Any deviation from standards being requested? 0/ L 0. 3 rrvU'`
JDiscussion of site constraints and capacities (streets, existing structures, etc.)
*Discussion of any applicable previous drainage studies and how this plan will affect it
Hy4eologic Criteria
Rainfall/runoff calculation method described and calculations provided
r 1 etention discharge / storage calculation method / calculations
J Storm recurrence intervals used
Discussion of other drainage facility design criteria used if not referenced in Standards
Hydaulic Criteria
Identify capacity of systems used
Specify velocities at critical points in system
Identify detention / retention outlet and routing
Discussion of other drainage facility design criteria used not referenced in Standards
LI Li D r 'nage Facility Design
Discuss drainage patterns / flows (pre vs. post)
Are they draining water onto another property owner? - if so, is it where the water flowed before? and is it not
more than what flowed there before? and no faster than it flowed before?
Discuss erosion control measures employed
44ttDiscuss detention pond design (sideslope, low flow channels, outlet works, freeboard, emergency spillway)
i V iscuss maintenance access and responsibilities
Conclusions
'4Verify compliance with DPDS (signed and se. ed certification
I' / E lain effectiveness of improvements with regar• to controlling discharges of 5 - 100 year storm by
a) Detaining
b) Accommodating runoff in existing / proposed easements or ROW discharging into primary system
c) Combination of a & b
o: \deve_ser \forms \engr \chklst.doc 8/21/02 9 of 12
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Project Name: ..j i
`� Review Date: D zA OZ
COLLEGE STATION Reviewer: , e Tho'(lr`1Q5,r1
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Drainage Reports(cont.)
Appendices
References (all criteria and technical information used)
Hydrologic computations
Land use assumptions for adjacent property
tk f h Minor /major storm runoff at specific points
/' Historic /fully developed runoff specific points
Hydrographs at critical points
[Hydraulic computations
(/ _ Culvert capacities (headwater and tailwater assumptions)
,� Storm sewer capacities
N Street capacities
Storm inlet capacities (inlet control rating)
#11 4 1 :: Open channel design
N
(A-- Detention area / volume capacity / outlet capacity
Attaphed Drawings
Location map with drainage patterns
)C, Fjoodplain map if any
-'Drainage plan with topo (existing and proposed with arrows if needed)
Details of outlet structures
o: \deve_ser \forms \engr \chklst.doc 8/21/02 10 of 12
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Project Name: fib_ .-- �' �-
`II G
Review Date: 0 (, r)
COLLEGE STATION
Reviewer: c
'1
Public Water Infrastructure C � -
General
Overall utility layout sheet - showing easements (platted or by separate instrument)
If separate instrument easements are needed - do not approve until we get them recorded
TXDOT peiutils needed!
Sealed and Signed
Engineers Estimates
L� ss
'Pipe material
'JPipe sizes (allowable....6,8,12,16,18 - note no 10" approved)
>. Depth (4' +) (min,max)
S eparation distances (TNRCC)
• All utilities in plan & profile w /sizes and type
"Private vs. Public line distinction
1.* Wyes not past property line (so meter can be within ROW /easement)
,JA- Max # of connections for size waterline (TNRCC)
2 Pipe deflection (noted as %, degrees, radius - with begin /end curve, not at jt.)
7 Grades - existing and proposed (centerline, right and left) shown in profile
Full TNRCC compliance
n Conflicts with other utilities shown
Labels on all major items in plan & profile (crossings)
N Size/Location sufficient for overall City needs /masterplan
✓1vlinimize dead -end lines
Vtines located in PUE/ROW �'-
S tationing on all fittings and taps 2-13.
Valves
,,,A- V spacing (500')
(v'')Jalves - system isolation
�`� Valves - at hydrant
,•/' B ackflow preventers/ and check valves uses as necessary ( @irrigation /fire sprinkler /pools/hazards)
V Blowoffs (FH ok too) @ end of dead end lines
Air release valves at all major high points
Fire Hydrants
04,1-- Fire hydrant spacing (Coverage)
Fire hydrant location (relative to curb)
X Fire hydrant - detail/type specified
N O Fire flow calculations provided
Service Lines
i, k Service lines - materials and size specified from main to meter
/� Services provided to all lots to a point beyond sidewalks on both sides of street
o: \deve_ser \forms \engr \chklst.doc 8/21/02 1 of 12
Project Name:
`of Review Date:
COLLEGE STATION Reviewer:
Public Water Infrastructure(cont.)
Details
$ Standard Details noted or included (referenced as city of CS Standard Details)
X. Details for all non - standard items (included/ok) (not on CS Std. detail sheet)
All MJ valves and fittings
X rust blocking
/Easement width adequate
yc Embedment details (specify option)
Trench safety if deeper than 5'
Erosion control notes
The following items are variances to the College Station public waterline standards:
o: \deve_ser \forms \engr \chklst.doc 8/21/02 2 of 12
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Project Name: ' � fl u j
Review Date: cw.D. ,
COLLEGE STATION Reviewer: 4 , A , /11• Ir■L•L
Ct
DEVELOPMENT PERMIT
1. Application Fee ($100)
2. Application
3. Erosion Control Plan
4. EPA/NOI (> 5 acres)
5. Public Infrastructure Inspection Fee ($300)
6. Drainage Report
7. HOA Covenants for maintenance of detention /retention ponds
8. Easements Dedicated (separate instrument)
60. Engineer's Estimates
(1 -4 necessary for rough grading /clearing all others necessary for full permit)
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