Removal Case Study: Dennison Dam - Olentangy River
Historical Information
1. Dam Name: Dennison Dam - Olentangy River
2. Estimate height of dam in feet - 225' long, 4' wide, 2' deep
3. Dam Type:
a) earthfill dam ____
b) concrete arch dam - X
c) gravity dam ____
d) masonry dam ____
e) timber cribs ____
f) other, please explain ____ ___________________
4. Location Description: Near Rt. 315 and Bean-Oller Road in Delaware County.
5. Year Constructed: Early 1900s Year Removed: 2002
6. Dam Owner:
a) public
b) private - X
c) abandoned
a) generate hydropower - X
b) irrigation
c) domestic water supply
d) navigation
e) flood control
f) recreation
g) industrial water supply
h) unknown
8. What repairs have been done to the dam? _________________
9. Reason(s) for Removal:
a) aesthetic enhancement - X
b) fish and wildlife habitat improvement - X c) cost savings ____
d) community revitalization ____
e) public safety hazard - X
f) water quality improvement - X
g) recreational improvement - X
h) alternative to dam ____
10. Project Sponsor (who initiated project): ODNR, Division of Natural Areas and Preserves
11. Dam Removal Funding Sources:
a) federal
b) state - X
c) local governmental agencies
d) other (please explain)
The dam removal was funded through the Ohio Scenic Rivers License Plate program. This program provides money generated by the sale of specialized license plates for river restoration activities on Ohio's scenic rivers.
12. Cost of Dam Removal: $17,000 - October 2002
13. List all Contractors by Name, include Address and Telephone #:
1) ODNR, Division of Civilian Conservation
2) ODOT provided dump trucks to haul the debris
a) federal - Nationwide Permit #27 U.S. ACOE
b) state - X 401 OEPA
c) municipal ____
a) before removal ____
b) during removal ____
c) after removal ____
a) before removal______________________________
b) during removal______________________________
c) after removal________________________________
a) Estimated Reservoir Area in acres_______________
b) Composition of river bed (eg. sand, pebbles, boulders, bedrock)?
c) Types of Fish caught in the river_______________
d) Water Quality
i) behind the dam Good____ Fair____ Poor______
ii) below the dam Good____ Fair____ Poor______
18. Were any studies of the river conducted before the dam was removed?
Yes or No.
If yes, who conducted the studies and who is the contact for obtaining them?
19. Have studies been conducted on the river after the dam was removed to document changes in the river?
Yes or No
If yes, who conducted the studies and who is the contact for obtaining them?
|