FLOOD00595

• County: Jefferson
• Community: Pleasant View
• Stream Name: Lena Gulch
• Title: Pleasant View Drainage Study
• Date: 11/28/1975
• Prepared For: Jefferson County
• Prepared By: Jefferson County Planning Department
• Floodplain - Doc Type: Floodplain Report/Masterplan

Figure II-I

Figure II

Figure II

Table II-I

Table III

Table III

Table III - 3

Table III - 4

Table III - 5

Table III - 6

Figure III - 1

Figure III - 2

Figure III - 3

Figure IV - 1

Table IV -- 1

Table IV

2

Table IV

3

Tahle IV 4

Table IV 5

,Figure V 1

Table V 1

Table V 2

Table V - 3

Table V

4

Table V

5

Figure VII - I

LIST OF TABLES AND FIGURES

Page

Drainage Basin ,..----------------...-----.----.- 3

2

Aerial Photograph __'___.._____n_____________ 4

3

Land Use Map

5

Reach Limits ---'-------..-----..---------,----- 6

I

Hydrologic Parameters

8

2

Storm Unit Hydrograph ------..--.-----,----- 11

2-Year Storm Hydrograph ------------------- 12

5-Year Storm Hydrograph ------------.--,----- 12

10-Year Storm Hydrograph -------.----.--,----- 13

100-Year Storm Hydrograph ---.------.------- 13

lntensi ty - Dura t ion Curves -,-,,,---,------- 9

Rainfall - Duration ,- Frequency Curves -- 10

100-Year Flood Plain Boundary -,---------- Envelope
Map (Scale 1" = 200':1

Special Drainage Problem ----..--'-----.----- 17

Peak Runoff Rates at Design Points ------ 15

2-Year Stom Hydrograph -----,---,-----,----- '19

5-Year Stom Hydrograph ----.--,-----.----- 19

10-Year Stann Hydrograph ----.------------- 20

100-Year Storm Hydrograph --.------------- 20

Location of Alignments and
Detention Pond Locations ----------------- 22

Street Crossing Sizes .---------..------------ 23

Closed Conduit Sizes --------..-------.---... 23

Detenti.on Pond VOlumE'S ---------------.---- 25

Unit Costs -----'-----.-----------,------------ 26

Alternate Costs '-----,-.-..--..----------.---.- 27

Runoff Rates at Design Points -------...---- Envelope