FLOOD04708

• County: Archuleta
• Community: Pagosa Springs
• Stream Name: San Juan River
• Basin: San Juan/Dolores
• Title: Pagosa Springs Community File
• Date: 1/1/2001
• Prepared For: CWCB
• Prepared By: CWCB
• Floodplain - Doc Type: Community File

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STUDY RESPONSIBiliTIES

The Colorado Water Conservation Board will:

1. Provide leadership in coordinating all activities.

2. Provide engineering and technical assistance.

3. Designate.the location for reference monuments.

The Upper San Juan Region Planning Commission, Archuleta County, the
Pagosa Springs, and the San Juan Soil Conservation District will:

Town of

1. Provide photogrammetric maps and cross-section data in accordance
with the Colorado Water Conservation Board specifications (Specifi-
cations are in accordance with National Mapping Standards.)

2. Secure all necessary rights of ingress and egress for engineering
fie 1 d surveys.

3. Install approximately 30 permanent reference monuments in the same
location and elevation as used in the photogrammetric ground control
survey as designated by the Colorado Water Conservation Board.

4. Collect historic flooding data.

5. Provide maps showing estimated location and density of future urbani-
zation and upstream watershed development.

6. Provide meeting room facil ities for presentation of final report.

The Soil Conservation Service will:

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1. Conduct engineering field surveys for hydrologic and hydraul ic
studies.

2. Conduct hydraulic and hydrologic studies, and develop water surface
profile and cross-section data.

3. Develop flood plain outl ines on the photogrammetric maps for the 100-
and 500-year frequency floods. Flood plain outl ines will be based on
existing channel and flood plain conditions.

4. Prepare and distribuLe review draft of the Flood Hazard Analyses
Report .

5. Provide one set of photo positive mylars with flood plain outl ines on
a sca J e of J ,., = 200'.

6. Prepare Flood Hazard Analyses Report for publication.